Fix expression default type.

Co-authored-by: ClementPasteau <ClementPasteau@users.noreply.github.com>

.circleci/config.yml

@@ -68,7 +68,7 @@ jobs:
 
       - run:
           name: Clean dist folder to keep only installers/binaries.
-          command: rm -rf "newIDE/electron-app/dist/mac/GDevelop 5.app"
+          command: rm -rf "newIDE/electron-app/dist/mac/GDevelop 5.app" && rm -rf "newIDE/electron-app/dist/mac-arm64/GDevelop 5.app"
 
       # Upload artifacts (CircleCI)
       - store_artifacts:
@@ -143,11 +143,11 @@ jobs:
       # Build GDevelop IDE (seems like we need to allow Node.js to use more space than usual)
       - run:
           name: Build GDevelop IDE
-          command: export NODE_OPTIONS="--max-old-space-size=7168" && cd newIDE/electron-app && npm run build -- --linux AppImage zip deb --publish=never
+          command: export NODE_OPTIONS="--max-old-space-size=7168" && cd newIDE/electron-app && npm run build -- --linux --publish=never
 
       - run:
           name: Clean dist folder to keep only installers/binaries.
-          command: rm -rf newIDE/electron-app/dist/linux-unpacked
+          command: rm -rf newIDE/electron-app/dist/linux-unpacked && rm -rf newIDE/electron-app/dist/linux-arm64-unpacked
 
       # Upload artifacts (CircleCI)
       - store_artifacts:

.github/ISSUE_TEMPLATE/--asset-store-submission.md

@@ -0,0 +1,19 @@
+---
+name: "📦 Asset Store submission"
+about: Submit a free asset pack for the GDevelop Asset Store.
+title: ''
+labels: "📦 Asset Store submission" 
+assignees: ''
+
+---
+
+BEFORE opening a new submission, please make sure that you:
+
+- You have packaged the asset pack according [these rules](https://wiki.gdevelop.io/gdevelop5/community/contribute-to-the-assets-store). Otherwise, your package may be rejected or we will ask you to do the changes.
+
+## Description
+
+- License:
+- Author:
+- Link to the original website:
+- Zip file:

Core/GDCore/Events/CodeGeneration/EventsCodeGenerator.cpp

@@ -43,7 +43,7 @@ gd::String EventsCodeGenerator::GenerateRelationalOperatorCall(
   std::size_t relationalOperatorIndex = instrInfos.parameters.size();
   for (std::size_t i = startFromArgument; i < instrInfos.parameters.size();
        ++i) {
-    if (instrInfos.parameters[i].type == "relationalOperator")
+    if (instrInfos.parameters[i].GetType() == "relationalOperator")
       relationalOperatorIndex = i;
   }
   // Ensure that there is at least one parameter after the relational operator
@@ -95,7 +95,7 @@ gd::String EventsCodeGenerator::GenerateOperatorCall(
   std::size_t operatorIndex = instrInfos.parameters.size();
   for (std::size_t i = startFromArgument; i < instrInfos.parameters.size();
        ++i) {
-    if (instrInfos.parameters[i].type == "operator") operatorIndex = i;
+    if (instrInfos.parameters[i].GetType() == "operator") operatorIndex = i;
   }
 
   // Ensure that there is at least one parameter after the operator
@@ -164,7 +164,7 @@ gd::String EventsCodeGenerator::GenerateCompoundOperatorCall(
   std::size_t operatorIndex = instrInfos.parameters.size();
   for (std::size_t i = startFromArgument; i < instrInfos.parameters.size();
        ++i) {
-    if (instrInfos.parameters[i].type == "operator") operatorIndex = i;
+    if (instrInfos.parameters[i].GetType() == "operator") operatorIndex = i;
   }
 
   // Ensure that there is at least one parameter after the operator
@@ -215,7 +215,7 @@ gd::String EventsCodeGenerator::GenerateMutatorCall(
   std::size_t operatorIndex = instrInfos.parameters.size();
   for (std::size_t i = startFromArgument; i < instrInfos.parameters.size();
        ++i) {
-    if (instrInfos.parameters[i].type == "operator") operatorIndex = i;
+    if (instrInfos.parameters[i].GetType() == "operator") operatorIndex = i;
   }
 
   // Ensure that there is at least one parameter after the operator
@@ -293,7 +293,7 @@ gd::String EventsCodeGenerator::GenerateConditionCode(
 
   // Verify that there are no mismatchs between object type in parameters.
   for (std::size_t pNb = 0; pNb < instrInfos.parameters.size(); ++pNb) {
-    if (ParameterMetadata::IsObject(instrInfos.parameters[pNb].type)) {
+    if (ParameterMetadata::IsObject(instrInfos.parameters[pNb].GetType())) {
       gd::String objectInParameter =
           condition.GetParameter(pNb).GetPlainString();
 
@@ -303,11 +303,11 @@ gd::String EventsCodeGenerator::GenerateConditionCode(
           !GetGlobalObjectsAndGroups().GetObjectGroups().Has(
               objectInParameter)) {
         return "/* Unknown object - skipped. */";
-      } else if (!instrInfos.parameters[pNb].supplementaryInformation.empty() &&
+      } else if (!instrInfos.parameters[pNb].GetExtraInfo().empty() &&
                  gd::GetTypeOfObject(GetGlobalObjectsAndGroups(),
                                      GetObjectsAndGroups(),
                                      objectInParameter) !=
-                     instrInfos.parameters[pNb].supplementaryInformation) {
+                     instrInfos.parameters[pNb].GetExtraInfo()) {
         return "/* Mismatched object type - skipped. */";
       }
     }
@@ -485,7 +485,7 @@ gd::String EventsCodeGenerator::GenerateActionCode(
 
   // Verify that there are no mismatchs between object type in parameters.
   for (std::size_t pNb = 0; pNb < instrInfos.parameters.size(); ++pNb) {
-    if (ParameterMetadata::IsObject(instrInfos.parameters[pNb].type)) {
+    if (ParameterMetadata::IsObject(instrInfos.parameters[pNb].GetType())) {
       gd::String objectInParameter = action.GetParameter(pNb).GetPlainString();
       if (!GetObjectsAndGroups().HasObjectNamed(objectInParameter) &&
           !GetGlobalObjectsAndGroups().HasObjectNamed(objectInParameter) &&
@@ -493,11 +493,11 @@ gd::String EventsCodeGenerator::GenerateActionCode(
           !GetGlobalObjectsAndGroups().GetObjectGroups().Has(
               objectInParameter)) {
         return "/* Unknown object - skipped. */";
-      } else if (!instrInfos.parameters[pNb].supplementaryInformation.empty() &&
+      } else if (!instrInfos.parameters[pNb].GetExtraInfo().empty() &&
                  gd::GetTypeOfObject(GetGlobalObjectsAndGroups(),
                                      GetObjectsAndGroups(),
                                      objectInParameter) !=
-                     instrInfos.parameters[pNb].supplementaryInformation) {
+                     instrInfos.parameters[pNb].GetExtraInfo()) {
         return "/* Mismatched object type - skipped. */";
       }
     }
@@ -679,21 +679,21 @@ gd::String EventsCodeGenerator::GenerateParameterCodes(
         supplementaryParametersTypes) {
   gd::String argOutput;
 
-  if (ParameterMetadata::IsExpression("number", metadata.type)) {
+  if (ParameterMetadata::IsExpression("number", metadata.GetType())) {
     argOutput = gd::ExpressionCodeGenerator::GenerateExpressionCode(
         *this, context, "number", parameter, lastObjectName);
-  } else if (ParameterMetadata::IsExpression("string", metadata.type)) {
+  } else if (ParameterMetadata::IsExpression("string", metadata.GetType())) {
     argOutput = gd::ExpressionCodeGenerator::GenerateExpressionCode(
         *this, context, "string", parameter, lastObjectName);
-  } else if (ParameterMetadata::IsExpression("variable", metadata.type)) {
+  } else if (ParameterMetadata::IsExpression("variable", metadata.GetType())) {
     argOutput = gd::ExpressionCodeGenerator::GenerateExpressionCode(
-        *this, context, metadata.type, parameter, lastObjectName);
-  } else if (ParameterMetadata::IsObject(metadata.type)) {
+        *this, context, metadata.GetType(), parameter, lastObjectName);
+  } else if (ParameterMetadata::IsObject(metadata.GetType())) {
     // It would be possible to run a gd::ExpressionCodeGenerator if later
     // objects can have nested objects, or function returning objects.
     argOutput =
-        GenerateObject(parameter.GetPlainString(), metadata.type, context);
-  } else if (metadata.type == "relationalOperator") {
+        GenerateObject(parameter.GetPlainString(), metadata.GetType(), context);
+  } else if (metadata.GetType() == "relationalOperator") {
     auto parameterString = parameter.GetPlainString();
     argOutput += parameterString == "=" ? "==" : parameterString;
     if (argOutput != "==" && argOutput != "<" && argOutput != ">" &&
@@ -703,7 +703,7 @@ gd::String EventsCodeGenerator::GenerateParameterCodes(
     }
 
     argOutput = "\"" + argOutput + "\"";
-  } else if (metadata.type == "operator") {
+  } else if (metadata.GetType() == "operator") {
     argOutput += parameter.GetPlainString();
     if (argOutput != "=" && argOutput != "+" && argOutput != "-" &&
         argOutput != "/" && argOutput != "*") {
@@ -712,28 +712,28 @@ gd::String EventsCodeGenerator::GenerateParameterCodes(
     }
 
     argOutput = "\"" + argOutput + "\"";
-  } else if (ParameterMetadata::IsBehavior(metadata.type)) {
+  } else if (ParameterMetadata::IsBehavior(metadata.GetType())) {
     argOutput = GenerateGetBehaviorNameCode(parameter.GetPlainString());
-  } else if (metadata.type == "key") {
+  } else if (metadata.GetType() == "key") {
     argOutput = "\"" + ConvertToString(parameter.GetPlainString()) + "\"";
-  } else if (metadata.type == "audioResource" ||
-             metadata.type == "bitmapFontResource" ||
-             metadata.type == "fontResource" ||
-             metadata.type == "imageResource" ||
-             metadata.type == "jsonResource" ||
-             metadata.type == "videoResource" ||
+  } else if (metadata.GetType() == "audioResource" ||
+             metadata.GetType() == "bitmapFontResource" ||
+             metadata.GetType() == "fontResource" ||
+             metadata.GetType() == "imageResource" ||
+             metadata.GetType() == "jsonResource" ||
+             metadata.GetType() == "videoResource" ||
              // Deprecated, old parameter names:
-             metadata.type == "password" || metadata.type == "musicfile" ||
-             metadata.type == "soundfile" || metadata.type == "police") {
+             metadata.GetType() == "password" || metadata.GetType() == "musicfile" ||
+             metadata.GetType() == "soundfile" || metadata.GetType() == "police") {
     argOutput = "\"" + ConvertToString(parameter.GetPlainString()) + "\"";
-  } else if (metadata.type == "mouse") {
+  } else if (metadata.GetType() == "mouse") {
     argOutput = "\"" + ConvertToString(parameter.GetPlainString()) + "\"";
-  } else if (metadata.type == "yesorno") {
+  } else if (metadata.GetType() == "yesorno") {
     auto parameterString = parameter.GetPlainString();
     argOutput += (parameterString == "yes" || parameterString == "oui")
                      ? GenerateTrue()
                      : GenerateFalse();
-  } else if (metadata.type == "trueorfalse") {
+  } else if (metadata.GetType() == "trueorfalse") {
     auto parameterString = parameter.GetPlainString();
     // This is duplicated in AdvancedExtension.cpp for GDJS
     argOutput += (parameterString == "True" || parameterString == "Vrai")
@@ -741,21 +741,21 @@ gd::String EventsCodeGenerator::GenerateParameterCodes(
                      : GenerateFalse();
   }
   // Code only parameter type
-  else if (metadata.type == "inlineCode") {
-    argOutput += metadata.supplementaryInformation;
+  else if (metadata.GetType() == "inlineCode") {
+    argOutput += metadata.GetExtraInfo();
   } else {
     // Try supplementary types if provided
     if (supplementaryParametersTypes) {
       for (std::size_t i = 0; i < supplementaryParametersTypes->size(); ++i) {
-        if ((*supplementaryParametersTypes)[i].first == metadata.type)
+        if ((*supplementaryParametersTypes)[i].first == metadata.GetType())
           argOutput += (*supplementaryParametersTypes)[i].second;
       }
     }
 
     // Type unknown
     if (argOutput.empty()) {
-      if (!metadata.type.empty())
-        cout << "Warning: Unknown type of parameter \"" << metadata.type
+      if (!metadata.GetType().empty())
+        cout << "Warning: Unknown type of parameter \"" << metadata.GetType()
              << "\"." << std::endl;
       argOutput += "\"" + ConvertToString(parameter.GetPlainString()) + "\"";
     }
@@ -1030,7 +1030,7 @@ gd::String EventsCodeGenerator::GenerateFreeCondition(
   for (std::size_t i = 0; i < instrInfos.parameters.size();
        ++i)  // Some conditions already have a "conditionInverted" parameter
   {
-    if (instrInfos.parameters[i].type == "conditionInverted")
+    if (instrInfos.parameters[i].GetType() == "conditionInverted")
       conditionAlreadyTakeCareOfInversion = true;
   }
   if (!conditionAlreadyTakeCareOfInversion && conditionInverted)
@@ -1051,7 +1051,7 @@ gd::String EventsCodeGenerator::GenerateObjectCondition(
   // Prepare call
   // Add a static_cast if necessary
   gd::String objectFunctionCallNamePart =
-      (!instrInfos.parameters[0].supplementaryInformation.empty())
+      (!instrInfos.parameters[0].GetExtraInfo().empty())
           ? "static_cast<" + objInfo.className + "*>(" +
                 GetObjectListName(objectName, context) + "[i])->" +
                 instrInfos.codeExtraInformation.functionCallName

Core/GDCore/Events/Serialization.cpp

@@ -184,8 +184,8 @@ void EventsListSerialization::UpdateInstructionsFromGD2x(
     for (std::size_t j = 0;
          j < parameters.size() && j < metadata.parameters.size();
          ++j) {
-      if (metadata.parameters[j].type == "relationalOperator" ||
-          metadata.parameters[j].type == "operator") {
+      if (metadata.parameters[j].GetType() == "relationalOperator" ||
+          metadata.parameters[j].GetType() == "operator") {
         if (j == parameters.size() - 1) {
           std::cout << "ERROR: No more parameters after a [relational]operator "
                        "when trying to update an instruction from GD2.x";

Core/GDCore/Extensions/Builtin/AudioExtension.cpp

@@ -73,9 +73,9 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
 
   extension
       .AddAction("RePlaySoundCanal",
-                 _("Play the sound of a channel"),
-                 _("Play the sound of the channel."),
-                 _("Play the sound of channel _PARAM1_"),
+                 _("Resume playing a sound on a channel"),
+                 _("Resume playing a sound on a channel that was paused."),
+                 _("Resume the sound of channel _PARAM1_"),
                  _("Sounds on channels"),
                  "res/actions/son24.png",
                  "res/actions/son.png")
@@ -132,9 +132,9 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
 
   extension
       .AddAction("RePlayMusicCanal",
-                 _("Play the music of a channel"),
-                 _("Play the music of the channel."),
-                 _("Play the music of channel _PARAM1_"),
+                 _("Resume playing a music on a channel"),
+                 _("Resume playing a music on a channel that was paused."),
+                 _("Resume the music of channel _PARAM1_"),
                  _("Music on channels"),
                  "res/actions/music24.png",
                  "res/actions/music.png")

Core/GDCore/Extensions/Builtin/BaseObjectExtension.cpp

@@ -28,7 +28,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
   extension.AddInstructionOrExpressionGroupMetadata(_("Movement using forces"))
       .SetIcon("res/actions/force24.png");
 
-  gd::ObjectMetadata& obj = extension.AddObject<gd::Object>(
+  gd::ObjectMetadata& obj = extension.AddObject<gd::ObjectConfiguration>(
       "", _("Base object"), _("Base object"), "res/objeticon24.png");
 
   obj.AddCondition("PosX",
@@ -36,8 +36,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                    _("Compare the X position of the object."),
                    _("the X position"),
                    _("Position"),
-                   "res/conditions/position24.png",
-                   "res/conditions/position.png")
+                   "res/conditions/position24_black.png",
+                   "res/conditions/position_black.png")
 
       .AddParameter("object", _("Object"))
       .UseStandardRelationalOperatorParameters("number")
@@ -48,8 +48,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                 _("Change the X position of an object."),
                 _("the X position"),
                 _("Position"),
-                "res/actions/position24.png",
-                "res/actions/position.png")
+                "res/actions/position24_black.png",
+                "res/actions/position_black.png")
 
       .AddParameter("object", _("Object"))
       .UseStandardOperatorParameters("number")
@@ -60,8 +60,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                    _("Compare the Y position of an object."),
                    _("the Y position"),
                    _("Position"),
-                   "res/conditions/position24.png",
-                   "res/conditions/position.png")
+                   "res/conditions/position24_black.png",
+                   "res/conditions/position_black.png")
 
       .AddParameter("object", _("Object"))
       .UseStandardRelationalOperatorParameters("number")
@@ -72,8 +72,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                 _("Change the Y position of an object."),
                 _("the Y position"),
                 _("Position"),
-                "res/actions/position24.png",
-                "res/actions/position.png")
+                "res/actions/position24_black.png",
+                "res/actions/position_black.png")
 
       .AddParameter("object", _("Object"))
       .UseStandardOperatorParameters("number")
@@ -85,8 +85,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                 _("Change the position of _PARAM0_: _PARAM1_ _PARAM2_ (x "
                   "axis), _PARAM3_ _PARAM4_ (y axis)"),
                 _("Position"),
-                "res/actions/position24.png",
-                "res/actions/position.png")
+                "res/actions/position24_black.png",
+                "res/actions/position_black.png")
 
       .AddParameter("object", _("Object"))
       .AddParameter("operator", _("Modification's sign"), "number")
@@ -102,8 +102,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                   "_PARAM2_ (x "
                   "axis), _PARAM3_ _PARAM4_ (y axis)"),
                 _("Position/Center"),
-                "res/actions/position24.png",
-                "res/actions/position.png")
+                "res/actions/position24_black.png",
+                "res/actions/position_black.png")
       .AddParameter("object", _("Object"))
       .AddParameter("operator", _("Modification's sign"), "number")
       .AddParameter("expression", _("X position"))
@@ -118,7 +118,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
          _("the X position of the center of rotation"),
          _("the X position of the center"),
          _("Position/Center"),
-         "res/actions/position24.png")
+         "res/actions/position24_black.png")
       .AddParameter("object", _("Object"))
       .UseStandardParameters("number");
 
@@ -129,7 +129,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
          _("the Y position of the center of rotation"),
          _("the Y position of the center"),
          _("Position/Center"),
-         "res/actions/position24.png")
+         "res/actions/position24_black.png")
       .AddParameter("object", _("Object"))
       .UseStandardParameters("number");
 
@@ -140,7 +140,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                                   "the object) left position"),
                                 _("the bounding box left position"),
                                 _("Position/Bounding Box"),
-                                "res/conditions/bounding-box-left.svg")
+                                "res/conditions/bounding-box-left_black.svg")
       .AddParameter("object", _("Object"))
       .UseStandardParameters("number");
 
@@ -151,7 +151,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
          _("the bounding box (the area encapsulating the object) top position"),
          _("the bounding box top position"),
          _("Position/Bounding Box"),
-         "res/conditions/bounding-box-top.svg")
+         "res/conditions/bounding-box-top_black.svg")
       .AddParameter("object", _("Object"))
       .UseStandardParameters("number");
 
@@ -162,7 +162,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                                   "the object) right position"),
                                 _("the bounding box right position"),
                                 _("Position/Bounding Box"),
-                                "res/conditions/bounding-box-right.svg")
+                                "res/conditions/bounding-box-right_black.svg")
       .AddParameter("object", _("Object"))
       .UseStandardParameters("number");
 
@@ -173,7 +173,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                                   "the object) bottom position"),
                                 _("the bounding box bottom position"),
                                 _("Position/Bounding Box"),
-                                "res/conditions/bounding-box-bottom.svg")
+                                "res/conditions/bounding-box-bottom_black.svg")
       .AddParameter("object", _("Object"))
       .UseStandardParameters("number");
 
@@ -184,7 +184,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                                   "the object) center X position"),
                                 _("the bounding box center X position"),
                                 _("Position/Bounding Box"),
-                                "res/conditions/bounding-box-center.svg")
+                                "res/conditions/bounding-box-center_black.svg")
       .AddParameter("object", _("Object"))
       .UseStandardParameters("number");
 
@@ -195,7 +195,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                                   "the object) center Y position"),
                                 _("the bounding box center Y position"),
                                 _("Position/Bounding Box"),
-                                "res/conditions/bounding-box-center.svg")
+                                "res/conditions/bounding-box-center_black.svg")
       .AddParameter("object", _("Object"))
       .UseStandardParameters("number");
 
@@ -222,8 +222,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                 _("Change the angle of rotation of an object (in degrees)."),
                 _("the angle"),
                 _("Angle"),
-                "res/actions/direction24.png",
-                "res/actions/direction.png")
+                "res/actions/direction24_black.png",
+                "res/actions/direction_black.png")
 
       .AddParameter("object", _("Object"))
       .UseStandardOperatorParameters("number");
@@ -234,8 +234,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                   "counterclockwise otherwise."),
                 _("Rotate _PARAM0_ at speed _PARAM1_ deg/second"),
                 _("Angle"),
-                "res/actions/direction24.png",
-                "res/actions/direction.png")
+                "res/actions/rotate24_black.png",
+                "res/actions/rotate_black.png")
 
       .AddParameter("object", _("Object"))
       .AddParameter("expression", _("Angular speed (in degrees per second)"))
@@ -248,8 +248,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
          _("Rotate an object towards an angle with the specified speed."),
          _("Rotate _PARAM0_ towards _PARAM1_ at speed _PARAM2_ deg/second"),
          _("Angle"),
-         "res/actions/direction24.png",
-         "res/actions/direction.png")
+         "res/actions/rotate24_black.png",
+         "res/actions/rotate_black.png")
 
       .AddParameter("object", _("Object"))
       .AddParameter("expression", _("Angle to rotate towards (in degrees)"))
@@ -264,8 +264,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
          _("Rotate _PARAM0_ towards _PARAM1_;_PARAM2_ at speed "
            "_PARAM3_ deg/second"),
          _("Angle"),
-         "res/actions/direction24.png",
-         "res/actions/direction.png")
+         "res/actions/rotate24_black.png",
+         "res/actions/rotate_black.png")
 
       .AddParameter("object", _("Object"))
       .AddParameter("expression", _("X position"))
@@ -393,7 +393,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                 "res/actions/layer.png")
 
       .AddParameter("object", _("Object"))
-      .AddParameter("layer", _("Move it to this layer (base layer if empty)"))
+      .AddParameter("layer", _("Move it to this layer"))
       .SetDefaultValue("\"\"")
       .MarkAsAdvanced();
 
@@ -512,8 +512,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                    _("Compare the angle of the specified object."),
                    _("the angle (in degrees)"),
                    _("Angle"),
-                   "res/conditions/direction24.png",
-                   "res/conditions/direction.png")
+                   "res/conditions/direction24_black.png",
+                   "res/conditions/direction_black.png")
 
       .AddParameter("object", _("Object"))
       .UseStandardRelationalOperatorParameters("number")
@@ -886,7 +886,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
          "res/conditions/timer24.png",
          "res/conditions/timer.png")
       .AddParameter("object", _("Object"))
-      .AddParameter("string", _("Timer's name"))
+      .AddParameter("identifier", _("Timer's name"), "objectTimer")
       .AddParameter("expression", _("Time in seconds"))
       .SetHidden();
 
@@ -900,7 +900,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
          "res/conditions/timer24.png",
          "res/conditions/timer.png")
       .AddParameter("object", _("Object"))
-      .AddParameter("string", _("Timer's name"))
+      .AddParameter("identifier", _("Timer's name"), "objectTimer")
       .AddParameter("relationalOperator", _("Sign of the test"), "time")
       .AddParameter("expression", _("Time in seconds"))
       .SetManipulatedType("number");
@@ -913,7 +913,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                    "res/conditions/timerPaused24.png",
                    "res/conditions/timerPaused.png")
       .AddParameter("object", _("Object"))
-      .AddParameter("string", _("Timer's name"))
+      .AddParameter("identifier", _("Timer's name"), "objectTimer")
       .MarkAsAdvanced();
 
   obj.AddAction(
@@ -926,7 +926,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
          "res/actions/timer24.png",
          "res/actions/timer.png")
       .AddParameter("object", _("Object"))
-      .AddParameter("string", _("Timer's name"));
+      .AddParameter("identifier", _("Timer's name"), "objectTimer");
 
   obj.AddAction("PauseObjectTimer",
                 _("Pause an object timer"),
@@ -936,7 +936,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                 "res/actions/pauseTimer24.png",
                 "res/actions/pauseTimer.png")
       .AddParameter("object", _("Object"))
-      .AddParameter("string", _("Timer's name"))
+      .AddParameter("identifier", _("Timer's name"), "objectTimer")
       .MarkAsAdvanced();
 
   obj.AddAction("UnPauseObjectTimer",
@@ -947,7 +947,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                 "res/actions/unPauseTimer24.png",
                 "res/actions/unPauseTimer.png")
       .AddParameter("object", _("Object"))
-      .AddParameter("string", _("Timer's name"))
+      .AddParameter("identifier", _("Timer's name"), "objectTimer")
       .MarkAsAdvanced();
 
   obj.AddAction("RemoveObjectTimer",
@@ -958,28 +958,28 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                 "res/actions/timer24.png",
                 "res/actions/timer.png")
       .AddParameter("object", _("Object"))
-      .AddParameter("string", _("Timer's name"))
+      .AddParameter("identifier", _("Timer's name"), "objectTimer")
       .MarkAsAdvanced();
 
   obj.AddExpression("X",
                     _("X position"),
                     _("X position of the object"),
                     _("Position"),
-                    "res/actions/position.png")
+                    "res/actions/position_black.png")
       .AddParameter("object", _("Object"));
 
   obj.AddExpression("Y",
                     _("Y position"),
                     _("Y position of the object"),
                     _("Position"),
-                    "res/actions/position.png")
+                    "res/actions/position_black.png")
       .AddParameter("object", _("Object"));
 
   obj.AddExpression("Angle",
                     _("Angle"),
                     _("Current angle, in degrees, of the object"),
                     _("Angle"),
-                    "res/actions/direction.png")
+                    "res/actions/direction_black.png")
       .AddParameter("object", _("Object"));
 
   obj.AddExpression("ForceX",
@@ -1022,14 +1022,14 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                     _("Width"),
                     _("Width of the object"),
                     _("Size"),
-                    "res/actions/scaleWidth.png")
+                    "res/actions/scaleWidth_black.png")
       .AddParameter("object", _("Object"));
 
   obj.AddExpression("Largeur",
                     _("Width"),
                     _("Width of the object"),
                     _("Size"),
-                    "res/actions/scaleWidth.png")
+                    "res/actions/scaleWidth_black.png")
       .AddParameter("object", _("Object"))
       .SetHidden();
 
@@ -1037,14 +1037,14 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                     _("Height"),
                     _("Height of the object"),
                     _("Size"),
-                    "res/actions/scaleHeight.png")
+                    "res/actions/scaleHeight_black.png")
       .AddParameter("object", _("Object"));
 
   obj.AddExpression("Hauteur",
                     _("Height"),
                     _("Height of the object"),
                     _("Size"),
-                    "res/actions/scaleHeight.png")
+                    "res/actions/scaleHeight_black.png")
       .AddParameter("object", _("Object"))
       .SetHidden();
 
@@ -1098,7 +1098,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .AddParameter("expression", _("Target Y position"));
 
   obj.AddExpression("Variable",
-                    _("Object variable"),
+                    _("Value of an object variable"),
                     _("Value of an object variable"),
                     _("Variables"),
                     "res/actions/var.png")
@@ -1114,7 +1114,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .AddParameter("objectvar", _("Variable"));
 
   obj.AddStrExpression("VariableString",
-                       _("Object variable"),
+                       _("Text of an object variable"),
                        _("Text of an object variable"),
                        _("Variables"),
                        "res/actions/var.png")
@@ -1127,7 +1127,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                     _("Object timers"),
                     "res/actions/time.png")
       .AddParameter("object", _("Object"))
-      .AddParameter("string", _("Timer's name"));
+      .AddParameter("identifier", _("Timer's name"), "objectTimer");
 
   obj.AddExpression("AngleToObject",
                     _("Angle between two objects"),
@@ -1135,7 +1135,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                       "If you need the angle to an arbitrary position, "
                       "use AngleToPosition."),
                     _("Angle"),
-                    "res/actions/position.png")
+                    "res/actions/position_black.png")
       .AddParameter("object", _("Object"))
       .AddParameter("objectPtr", _("Object"));
 
@@ -1146,7 +1146,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                       "getting the cartesian coordinates of a 2D vector, using "
                       "its polar coordinates."),
                     _("Position"),
-                    "res/actions/position.png")
+                    "res/actions/position_black.png")
       .AddParameter("object", _("Object"))
       .AddParameter("expression", _("Angle, in degrees"))
       .AddParameter("expression", _("Distance"));
@@ -1158,7 +1158,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                       "getting the cartesian coordinates of a 2D vector, using "
                       "its polar coordinates."),
                     _("Position"),
-                    "res/actions/position.png")
+                    "res/actions/position_black.png")
       .AddParameter("object", _("Object"))
       .AddParameter("expression", _("Angle, in degrees"))
       .AddParameter("expression", _("Distance"));
@@ -1169,7 +1169,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                       "\"target\" position (in degrees). If you need the angle "
                       "between two objects, use AngleToObject."),
                     _("Angle"),
-                    "res/actions/position.png")
+                    "res/actions/position_black.png")
       .AddParameter("object", _("Object"))
       .AddParameter("expression", _("Target X position"))
       .AddParameter("expression", _("Target Y position"));
@@ -1565,7 +1565,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                        _("Object name"),
                        _("Return the name of the object"),
                        "",
-                       "res/conditions/text.png")
+                       "res/conditions/text_black.png")
       .AddParameter("object", _("Object"));
 
   obj.AddStrExpression("Layer",

Core/GDCore/Extensions/Builtin/CameraExtension.cpp

@@ -22,6 +22,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
           "object or a position.",
           "Florian Rival",
           "Open source (MIT License)")
+      .SetCategory("Camera")
       .SetExtensionHelpPath("/interface/scene-editor/layers-and-cameras");
   extension.AddInstructionOrExpressionGroupMetadata(_("Layers and cameras"))
       .SetIcon("res/conditions/camera24.png");
@@ -221,7 +222,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                  "res/actions/camera24.png",
                  "res/actions/camera.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer (base layer if empty)"))
+      .AddParameter("layer", _("Layer"))
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Width"), "", true)
       .AddParameter("expression", _("Height"), "", true)
@@ -256,7 +257,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                  "res/actions/camera24.png",
                  "res/actions/camera.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer (base layer if empty)"))
+      .AddParameter("layer", _("Layer"))
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number"))
       .MarkAsComplex();
@@ -272,7 +273,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                  "res/actions/camera24.png",
                  "res/actions/camera.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer (base layer if empty)"))
+      .AddParameter("layer", _("Layer"))
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number"))
       .AddParameter("expression", _("Width"))
@@ -290,7 +291,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                  "res/actions/camera24.png",
                  "res/actions/camera.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer (base layer if empty)"))
+      .AddParameter("layer", _("Layer"))
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number"))
       .AddParameter(
@@ -309,7 +310,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
 
   extension
       .AddAction("ZoomCamera",
-                 _("Change camera zoom"),
+                 _("Camera zoom"),
                  _("Change camera zoom."),
                  _("Change camera zoom to _PARAM1_ (layer: _PARAM2_, camera: "
                    "_PARAM3_)"),
@@ -413,7 +414,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                  "res/actions/layer24.png",
                  "res/actions/layer.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer (base layer if empty)"))
+      .AddParameter("layer", _("Layer"))
       .SetDefaultValue("\"\"")
       .MarkAsAdvanced();
 
@@ -426,7 +427,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                  "res/actions/layer24.png",
                  "res/actions/layer.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer (base layer if empty)"))
+      .AddParameter("layer", _("Layer"))
       .SetDefaultValue("\"\"")
       .MarkAsAdvanced();
 
@@ -439,7 +440,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                     "res/conditions/layer24.png",
                     "res/conditions/layer.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer (base layer if empty)"))
+      .AddParameter("layer", _("Layer"))
       .SetDefaultValue("\"\"")
       .MarkAsAdvanced();
 
@@ -576,7 +577,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
 
   extension
       .AddAction("SetLayerDefaultZOrder",
-                 _("Change layer default Z order"),
+                 _("Layer default Z order"),
                  _("Change the default Z order set to objects when they are "
                    "created on a layer."),
                  _("Set the default Z order of objects created on _PARAM1_ to "

Core/GDCore/Extensions/Builtin/CommonConversionsExtension.cpp

@@ -21,14 +21,14 @@ BuiltinExtensionsImplementer::ImplementsCommonConversionsExtension(
           "Open source (MIT License)")
       .SetExtensionHelpPath("/all-features/common-conversions");
   extension.AddInstructionOrExpressionGroupMetadata(_("Conversion"))
-      .SetIcon("res/conditions/toujours24.png");
+      .SetIcon("res/conditions/toujours24_black.png");
 
   extension
       .AddExpression("ToNumber",
                      _("Text > Number"),
                      _("Convert the text to a number"),
                      "",
-                     "res/conditions/toujours24.png")
+                     "res/conditions/toujours24_black.png")
       .AddParameter("string", _("Text to convert to a number"));
 
   extension
@@ -36,7 +36,7 @@ BuiltinExtensionsImplementer::ImplementsCommonConversionsExtension(
                         _("Number > Text"),
                         _("Convert the result of the expression to text"),
                         "",
-                        "res/conditions/toujours24.png")
+                        "res/conditions/toujours24_black.png")
       .AddParameter("expression", _("Expression to be converted to text"));
 
   extension
@@ -45,7 +45,7 @@ BuiltinExtensionsImplementer::ImplementsCommonConversionsExtension(
                         _("Convert the result of the expression to text, "
                           "without using the scientific notation"),
                         "",
-                        "res/conditions/toujours24.png")
+                        "res/conditions/toujours24_black.png")
       .AddParameter("expression", _("Expression to be converted to text"));
 
   extension
@@ -54,7 +54,7 @@ BuiltinExtensionsImplementer::ImplementsCommonConversionsExtension(
           _("Degrees > Radians"),
           _("Converts the angle, expressed in degrees, into radians"),
           "",
-          "res/conditions/toujours24.png")
+          "res/conditions/toujours24_black.png")
       .AddParameter("expression", _("Angle, in degrees"));
 
   extension
@@ -63,7 +63,7 @@ BuiltinExtensionsImplementer::ImplementsCommonConversionsExtension(
           _("Radians > Degrees"),
           _("Converts the angle, expressed in radians, into degrees"),
           "",
-          "res/conditions/toujours24.png")
+          "res/conditions/toujours24_black.png")
       .AddParameter("expression", _("Angle, in radians"));
 
   extension
@@ -71,7 +71,7 @@ BuiltinExtensionsImplementer::ImplementsCommonConversionsExtension(
                         _("Convert scene variable to JSON"),
                         _("Convert a scene variable to JSON"),
                         _("JSON"),
-                        "res/conditions/toujours24.png")
+                        "res/conditions/toujours24_black.png")
       .AddParameter("scenevar", _("Scene variable to be stringified"));
 
   extension
@@ -79,7 +79,7 @@ BuiltinExtensionsImplementer::ImplementsCommonConversionsExtension(
                         _("Convert global variable to JSON"),
                         _("Convert a global variable to JSON"),
                         _("JSON"),
-                        "res/conditions/toujours24.png")
+                        "res/conditions/toujours24_black.png")
       .AddParameter("globalvar", _("The global variable to be stringified"));
 
   extension
@@ -87,7 +87,7 @@ BuiltinExtensionsImplementer::ImplementsCommonConversionsExtension(
                         _("Convert object variable to JSON"),
                         _("Convert an object variable to JSON"),
                         _("JSON"),
-                        "res/conditions/toujours24.png")
+                        "res/conditions/toujours24_black.png")
       .AddParameter("objectPtr", _("The object with the variable"))
       .AddParameter("objectvar", _("The object variable to be stringified"));
 

Core/GDCore/Extensions/Builtin/CommonInstructionsExtension.cpp

@@ -33,7 +33,7 @@ BuiltinExtensionsImplementer::ImplementsCommonInstructionsExtension(
       .SetExtensionHelpPath("/all-features/advanced-conditions");
   extension
       .AddInstructionOrExpressionGroupMetadata(_("Events and control flow"))
-      .SetIcon("res/conditions/toujours24.png");
+      .SetIcon("res/conditions/toujours24_black.png");
 
   extension
       .AddCondition("Always",
@@ -42,8 +42,8 @@ BuiltinExtensionsImplementer::ImplementsCommonInstructionsExtension(
                       "the condition is inverted)."),
                     _("Always"),
                     "",
-                    "res/conditions/toujours24.png",
-                    "res/conditions/toujours.png")
+                    "res/conditions/toujours24_black.png",
+                    "res/conditions/toujours_black.png")
       .SetHelpPath("/all-features/advanced-conditions")
       .AddCodeOnlyParameter("conditionInverted", "")
       .MarkAsAdvanced();
@@ -61,8 +61,8 @@ BuiltinExtensionsImplementer::ImplementsCommonInstructionsExtension(
                     _("Check if one of the sub conditions is true"),
                     _("If one of these conditions is true:"),
                     "",
-                    "res/conditions/or24.png",
-                    "res/conditions/or.png")
+                    "res/conditions/or24_black.png",
+                    "res/conditions/or_black.png")
       .SetCanHaveSubInstructions()
       .MarkAsAdvanced();
 
@@ -72,8 +72,8 @@ BuiltinExtensionsImplementer::ImplementsCommonInstructionsExtension(
                     _("Check if all sub conditions are true"),
                     _("If all of these conditions are true:"),
                     "",
-                    "res/conditions/and24.png",
-                    "res/conditions/and.png")
+                    "res/conditions/and24_black.png",
+                    "res/conditions/and_black.png")
       .SetCanHaveSubInstructions()
       .MarkAsAdvanced();
 
@@ -84,8 +84,8 @@ BuiltinExtensionsImplementer::ImplementsCommonInstructionsExtension(
           _("Return the contrary of the result of the sub conditions"),
           _("Invert the logical result of these conditions:"),
           "",
-          "res/conditions/not24.png",
-          "res/conditions/not.png")
+          "res/conditions/not24_black.png",
+          "res/conditions/not_black.png")
       .SetCanHaveSubInstructions()
       .MarkAsAdvanced();
 
@@ -104,8 +104,8 @@ BuiltinExtensionsImplementer::ImplementsCommonInstructionsExtension(
                     _("Compare the two numbers."),
                     _("_PARAM0_ _PARAM1_ _PARAM2_"),
                     "",
-                    "res/conditions/egal24.png",
-                    "res/conditions/egal.png")
+                    "res/conditions/egal24_black.png",
+                    "res/conditions/egal_black.png")
       .SetHelpPath("/all-features/advanced-conditions")
       .AddParameter("expression", _("First expression"))
       .AddParameter("relationalOperator", _("Sign of the test"), "number")
@@ -125,8 +125,8 @@ BuiltinExtensionsImplementer::ImplementsCommonInstructionsExtension(
                     _("Compare the two strings."),
                     _("_PARAM0_ _PARAM1_ _PARAM2_"),
                     "",
-                    "res/conditions/egal24.png",
-                    "res/conditions/egal.png")
+                    "res/conditions/egal24_black.png",
+                    "res/conditions/egal_black.png")
       .SetHelpPath("/all-features/advanced-conditions")
       .AddParameter("string", _("First string expression"))
       .AddParameter("relationalOperator", _("Sign of the test"), "string")

Core/GDCore/Extensions/Builtin/FileExtension.cpp

@@ -21,7 +21,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsFileExtension(
           "Florian Rival",
           "Open source (MIT License)")
       .SetExtensionHelpPath("/all-features/storage")
-      .SetCategory("Device");
+      .SetCategory("Advanced");
   extension.AddInstructionOrExpressionGroupMetadata(_("Storage"))
       .SetIcon("res/conditions/fichier24.png");
 

Core/GDCore/Extensions/Builtin/MathematicalToolsExtension.cpp

@@ -485,6 +485,13 @@ BuiltinExtensionsImplementer::ImplementsMathematicalToolsExtension(
       .AddParameter("expression", _("Angle, in degrees"))
       .AddParameter("expression", _("Distance"));
 
+  extension
+      .AddExpression("Pi",
+                     _("Number Pi (3.1415...)"),
+                     _("The number Pi (3.1415...)"),
+                     "",
+                     "res/mathfunction.png")
+      .SetHelpPath("/all-features/expressions");
 }
 
 }  // namespace gd

Core/GDCore/Extensions/Builtin/SceneExtension.cpp

@@ -112,7 +112,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSceneExtension(
 
   extension
       .AddAction("SceneBackground",
-                 _("Change background color"),
+                 _("Background color"),
                  _("Change the background color of the scene."),
                  _("Set background color to _PARAM1_"),
                  "",

Core/GDCore/Extensions/Builtin/SpriteExtension/SpriteExtension.cpp

@@ -22,6 +22,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                                "Florian Rival",
                                "Open source (MIT License)")
       .SetExtensionHelpPath("/objects/sprite");
+  extension.AddInstructionOrExpressionGroupMetadata(_("Sprite"))
+      .SetIcon("CppPlatform/Extensions/spriteicon.png");
 
   gd::ObjectMetadata& obj =
       extension
@@ -33,7 +35,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
           .SetCategoryFullName(_("General"));
 
   obj.AddAction("Opacity",
-                _("Change sprite opacity"),
+                _("Sprite opacity"),
                 _("Change the opacity of a Sprite. 0 is fully transparent, 255 "
                   "is opaque (default)."),
                 _("the opacity"),
@@ -79,8 +81,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
            "is in 8 directions mode, the valid directions are 0..7"),
          _("the direction"),
          _("Direction"),
-         "res/actions/direction24.png",
-         "res/actions/direction.png")
+         "res/actions/direction24_black.png",
+         "res/actions/direction_black.png")
       .SetHidden()  // Hide as 8 direction is not supported officially in the
                     // interface.
       .AddParameter("object", _("Object"), "Sprite")
@@ -140,8 +142,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                 "Rotate an object towards a position.",
                 "Rotate _PARAM0_ towards _PARAM1_;_PARAM2_",
                 _("Direction"),
-                "res/actions/direction24.png",
-                "res/actions/direction.png")
+                "res/actions/rotate24_black.png",
+                "res/actions/rotate_black.png")
 
       .AddParameter("object", _("Object to be rotated"), "Sprite")
       .AddParameter("expression", _("X position"))
@@ -156,8 +158,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                 _("Modify the scale of the specified object."),
                 _("the scale"),
                 _("Size"),
-                "res/actions/scale24.png",
-                "res/actions/scale.png")
+                "res/actions/scale24_black.png",
+                "res/actions/scale_black.png")
 
       .AddParameter("object", _("Object"), "Sprite")
       .UseStandardOperatorParameters("number")
@@ -168,8 +170,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                 _("Modify the scale of the width of an object."),
                 _("the width's scale"),
                 _("Size"),
-                "res/actions/scale24.png",
-                "res/actions/scale.png")
+                "res/actions/scaleWidth24_black.png",
+                "res/actions/scaleWidth_black.png")
 
       .AddParameter("object", _("Object"), "Sprite")
       .UseStandardOperatorParameters("number")
@@ -180,8 +182,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                 _("Modify the scale of the height of an object."),
                 _("the height's scale"),
                 _("Size"),
-                "res/actions/scale24.png",
-                "res/actions/scale.png")
+                "res/actions/scaleHeight24_black.png",
+                "res/actions/scaleHeight_black.png")
 
       .AddParameter("object", _("Object"), "Sprite")
       .UseStandardOperatorParameters("number")
@@ -192,8 +194,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                 _("Change the width of a Sprite object."),
                 _("the width"),
                 _("Size"),
-                "res/actions/scale24.png",
-                "res/actions/scale.png")
+                "res/actions/scaleWidth24_black.png",
+                "res/actions/scaleWidth_black.png")
 
       .AddParameter("object", _("Object"), "Sprite")
       .UseStandardOperatorParameters("number")
@@ -204,8 +206,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                    _("Compare the width of a Sprite object."),
                    _("the width"),
                    _("Size"),
-                   "res/conditions/scaleWidth24.png",
-                   "res/conditions/scaleWidth.png")
+                   "res/conditions/scaleWidth24_black.png",
+                   "res/conditions/scaleWidth_black.png")
 
       .AddParameter("object", _("Object"), "Sprite")
       .UseStandardRelationalOperatorParameters("number")
@@ -216,8 +218,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                 _("Change the height of a Sprite object."),
                 _("the height"),
                 _("Size"),
-                "res/actions/scale24.png",
-                "res/actions/scale.png")
+                "res/actions/scaleHeight24_black.png",
+                "res/actions/scaleHeight_black.png")
 
       .AddParameter("object", _("Object"), "Sprite")
       .UseStandardOperatorParameters("number")
@@ -228,8 +230,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                    _("Compare the height of a Sprite object."),
                    _("the height"),
                    _("Size"),
-                   "res/conditions/scaleHeight24.png",
-                   "res/conditions/scaleHeight.png")
+                   "res/conditions/scaleHeight24_black.png",
+                   "res/conditions/scaleHeight_black.png")
 
       .AddParameter("object", _("Object"), "Sprite")
       .UseStandardRelationalOperatorParameters("number")
@@ -240,8 +242,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                 _("Change the size of an object."),
                 _("Change the size of _PARAM0_: set to _PARAM1_x_PARAM2_"),
                 _("Size"),
-                "res/actions/scale24.png",
-                "res/actions/scale.png")
+                "res/actions/scale24_black.png",
+                "res/actions/scale_black.png")
 
       .AddParameter("object", _("Object"))
       .AddParameter("expression", _("Width"))
@@ -281,8 +283,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
            "from 0 to 7. Otherwise, the direction is in degrees."),
          _("the direction"),
          _("Direction"),
-         "res/conditions/direction24.png",
-         "res/conditions/direction.png")
+         "res/conditions/direction24_black.png",
+         "res/conditions/direction_black.png")
       .SetHidden()  // Hide as 8 direction is not supported officially in the
                     // interface.
       .AddParameter("object", _("Object"), "Sprite")
@@ -330,8 +332,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                    _("Compare the scale of the width of an object."),
                    _("the width's scale"),
                    _("Size"),
-                   "res/conditions/scaleWidth24.png",
-                   "res/conditions/scaleWidth.png")
+                   "res/conditions/scaleWidth24_black.png",
+                   "res/conditions/scaleWidth_black.png")
 
       .AddParameter("object", _("Object"), "Sprite")
       .UseStandardRelationalOperatorParameters("number")
@@ -342,8 +344,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                    _("Compare the scale of the height of an object."),
                    _("the height's scale"),
                    _("Size"),
-                   "res/conditions/scaleHeight24.png",
-                   "res/conditions/scaleHeight.png")
+                   "res/conditions/scaleHeight24_black.png",
+                   "res/conditions/scaleHeight_black.png")
 
       .AddParameter("object", _("Object"), "Sprite")
       .UseStandardRelationalOperatorParameters("number")
@@ -449,8 +451,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                 "Rotate an object towards another.",
                 "Rotate _PARAM0_ towards _PARAM1_",
                 _("Direction"),
-                "res/actions/direction24.png",
-                "res/actions/direction.png")
+                "res/actions/rotate24_black.png",
+                "res/actions/rotate_black.png")
 
       .AddParameter("object", _("Object"), "Sprite")
       .AddParameter("objectPtr", "Rotate toward this object")
@@ -461,7 +463,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                     _("X position of a point"),
                     _("X position of a point"),
                     _("Position"),
-                    "res/actions/position.png")
+                    "res/actions/position_black.png")
       .SetHidden()
       .AddParameter("object", _("Object"), "Sprite")
       .AddParameter("objectPointName", _("Name of the point"), "", true);
@@ -470,7 +472,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                     _("Y position of a point"),
                     _("Y position of a point"),
                     _("Position"),
-                    "res/actions/position.png")
+                    "res/actions/position_black.png")
       .SetHidden()
       .AddParameter("object", _("Object"), "Sprite")
       .AddParameter("objectPointName", _("Name of the point"), "", true);
@@ -479,7 +481,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                     _("X position of a point"),
                     _("X position of a point"),
                     _("Position"),
-                    "res/actions/position.png")
+                    "res/actions/position_black.png")
 
       .AddParameter("object", _("Object"), "Sprite")
       .AddParameter("objectPointName", _("Name of the point"));
@@ -488,7 +490,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                     _("Y position of a point"),
                     _("Y position of a point"),
                     _("Position"),
-                    "res/actions/position.png")
+                    "res/actions/position_black.png")
 
       .AddParameter("object", _("Object"), "Sprite")
       .AddParameter("objectPointName", _("Name of the point"));
@@ -497,7 +499,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                     _("Direction"),
                     _("Direction of the object"),
                     _("Direction"),
-                    "res/actions/direction.png")
+                    "res/actions/direction_black.png")
       .SetHidden()
       .AddParameter("object", _("Object"), "Sprite");
 
@@ -505,7 +507,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                     _("Direction"),
                     _("Direction of the object"),
                     _("Direction"),
-                    "res/actions/direction.png")
+                    "res/actions/direction_black.png")
       .SetHidden()  // Hide as 8 direction is not supported officially in the
                     // interface.
       .AddParameter("object", _("Object"), "Sprite");
@@ -550,14 +552,14 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                     _("Scale of the width of an object"),
                     _("Scale of the width of an object"),
                     _("Size"),
-                    "res/actions/scaleWidth.png")
+                    "res/actions/scaleWidth_black.png")
       .AddParameter("object", _("Object"), "Sprite");
 
   obj.AddExpression("ScaleY",
                     _("Scale of the height of an object"),
                     _("Scale of the height of an object"),
                     _("Size"),
-                    "res/actions/scaleHeight.png")
+                    "res/actions/scaleHeight_black.png")
       .AddParameter("object", _("Object"), "Sprite");
 
   obj.AddExpression("Opacity",

Core/GDCore/Extensions/Builtin/SpriteExtension/SpriteObject.cpp

@@ -25,8 +25,7 @@ namespace gd {
 
 Animation SpriteObject::badAnimation;
 
-SpriteObject::SpriteObject(gd::String name_)
-    : Object(name_), updateIfNotVisible(false) {}
+SpriteObject::SpriteObject() : updateIfNotVisible(false) {}
 
 SpriteObject::~SpriteObject(){};
 

Core/GDCore/Extensions/Builtin/SpriteExtension/SpriteObject.h

@@ -36,11 +36,11 @@ namespace gd {
  * \see gd::BuiltinExtensionsImplementer::ImplementsSpriteExtension
  * \ingroup SpriteObjectExtension
  */
-class GD_CORE_API SpriteObject : public gd::Object {
+class GD_CORE_API SpriteObject : public gd::ObjectConfiguration {
  public:
-  SpriteObject(gd::String name_);
+  SpriteObject();
   virtual ~SpriteObject();
-  std::unique_ptr<gd::Object> Clone() const override {
+  std::unique_ptr<gd::ObjectConfiguration> Clone() const override {
     return gd::make_unique<SpriteObject>(*this);
   }
 

Core/GDCore/Extensions/Builtin/StringInstructionsExtension.cpp

@@ -21,20 +21,20 @@ BuiltinExtensionsImplementer::ImplementsStringInstructionsExtension(
           "Open source (MIT License)")
       .SetExtensionHelpPath("" /*TODO: Add a documentation page for this */);
   extension.AddInstructionOrExpressionGroupMetadata(_("Text manipulation"))
-      .SetIcon("res/actions/text24.png");
+      .SetIcon("res/actions/text24_black.png");
 
   extension.AddStrExpression("NewLine",
                              _("Insert a new line"),
                              _("Insert a new line"),
                              "",
-                             "res/conditions/toujours24.png");
+                             "res/conditions/toujours24_black.png");
 
   extension
       .AddStrExpression("FromCodePoint",
                         _("Get character from code point"),
                         _("Get character from code point"),
                         "",
-                        "res/conditions/toujours24.png")
+                        "res/conditions/toujours24_black.png")
 
       .AddParameter("expression", _("Code point"));
 
@@ -43,7 +43,7 @@ BuiltinExtensionsImplementer::ImplementsStringInstructionsExtension(
                         _("Uppercase a text"),
                         _("Uppercase a text"),
                         "",
-                        "res/conditions/toujours24.png")
+                        "res/conditions/toujours24_black.png")
 
       .AddParameter("string", _("Text"));
 
@@ -52,7 +52,7 @@ BuiltinExtensionsImplementer::ImplementsStringInstructionsExtension(
                         _("Lowercase a text"),
                         _("Lowercase a text"),
                         "",
-                        "res/conditions/toujours24.png")
+                        "res/conditions/toujours24_black.png")
 
       .AddParameter("string", _("Text"));
 
@@ -61,7 +61,7 @@ BuiltinExtensionsImplementer::ImplementsStringInstructionsExtension(
                         _("Get a portion of a text"),
                         _("Get a portion of a text"),
                         "",
-                        "res/conditions/toujours24.png")
+                        "res/conditions/toujours24_black.png")
 
       .AddParameter("string", _("Text"))
       .AddParameter("expression",
@@ -74,7 +74,7 @@ BuiltinExtensionsImplementer::ImplementsStringInstructionsExtension(
                         _("Get a character from a text"),
                         _("Get a character from a text"),
                         "",
-                        "res/conditions/toujours24.png")
+                        "res/conditions/toujours24_black.png")
 
       .AddParameter("string", _("Text"))
       .AddParameter(
@@ -86,7 +86,7 @@ BuiltinExtensionsImplementer::ImplementsStringInstructionsExtension(
                         _("Repeat a text"),
                         _("Repeat a text"),
                         "",
-                        "res/conditions/toujours24.png")
+                        "res/conditions/toujours24_black.png")
 
       .AddParameter("string", _("Text to repeat"))
       .AddParameter("expression", _("Repetition count"));
@@ -96,7 +96,7 @@ BuiltinExtensionsImplementer::ImplementsStringInstructionsExtension(
                      _("Length of a text"),
                      _("Length of a text"),
                      "",
-                     "res/conditions/toujours24.png")
+                     "res/conditions/toujours24_black.png")
 
       .AddParameter("string", _("Text"));
 
@@ -106,7 +106,7 @@ BuiltinExtensionsImplementer::ImplementsStringInstructionsExtension(
                      _("Search in a text (return the position of the result or "
                        "-1 if not found)"),
                      "",
-                     "res/conditions/toujours24.png")
+                     "res/conditions/toujours24_black.png")
 
       .AddParameter("string", _("Text"))
       .AddParameter("string", _("Text to search for"));
@@ -117,7 +117,7 @@ BuiltinExtensionsImplementer::ImplementsStringInstructionsExtension(
                      "Search in a text from the end (return the position of "
                      "the result or -1 if not found)",
                      "",
-                     "res/conditions/toujours24.png")
+                     "res/conditions/toujours24_black.png")
 
       .AddParameter("string", _("Text"))
       .AddParameter("string", _("Text to search for"))
@@ -131,7 +131,7 @@ BuiltinExtensionsImplementer::ImplementsStringInstructionsExtension(
             "the result, from the beginning of the string, or -1 if not "
             "found)"),
           "",
-          "res/conditions/toujours24.png")
+          "res/conditions/toujours24_black.png")
 
       .AddParameter("string", _("Text"))
       .AddParameter("string", _("Text to search for"));
@@ -142,7 +142,7 @@ BuiltinExtensionsImplementer::ImplementsStringInstructionsExtension(
                      _("Search in a text, starting from a position (return the "
                        "position of the result or -1 if not found)"),
                      "",
-                     "res/conditions/toujours24.png")
+                     "res/conditions/toujours24_black.png")
 
       .AddParameter("string", _("Text"))
       .AddParameter("string", _("Text to search for"))
@@ -157,7 +157,7 @@ BuiltinExtensionsImplementer::ImplementsStringInstructionsExtension(
           "Search in a text from the end, starting from a position (return "
           "the position of the result or -1 if not found)",
           "",
-          "res/conditions/toujours24.png")
+          "res/conditions/toujours24_black.png")
 
       .AddParameter("string", _("Text"))
       .AddParameter("string", _("Text to search for"))
@@ -175,7 +175,7 @@ BuiltinExtensionsImplementer::ImplementsStringInstructionsExtension(
             " the position of the result, from the beginning of the string, or "
             "-1 if not found)"),
           "",
-          "res/conditions/toujours24.png")
+          "res/conditions/toujours24_black.png")
 
       .AddParameter("string", _("Text"))
       .AddParameter("string", _("Text to search for"))

Core/GDCore/Extensions/Builtin/TimeExtension.cpp

@@ -36,7 +36,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsTimeExtension(
                     "res/conditions/timer.png")
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("expression", _("Time in seconds"))
-      .AddParameter("string", _("Timer's name"))
+      .AddParameter("identifier", _("Timer's name"), "sceneTimer")
       .SetHidden();
 
   extension
@@ -50,7 +50,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsTimeExtension(
                     "res/conditions/timer24.png",
                     "res/conditions/timer.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("string", _("Timer's name"))
+      .AddParameter("identifier", _("Timer's name"), "sceneTimer")
       .AddParameter("relationalOperator", _("Sign of the test"), "time")
       .AddParameter("expression", _("Time in seconds"))
       .SetManipulatedType("number");
@@ -78,7 +78,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsTimeExtension(
                     "res/conditions/timerPaused24.png",
                     "res/conditions/timerPaused.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("string", _("Timer's name"))
+      .AddParameter("identifier", _("Timer's name"), "sceneTimer")
       .MarkAsAdvanced();
 
   extension
@@ -93,7 +93,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsTimeExtension(
           "res/actions/timer24.png",
           "res/actions/timer.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("string", _("Timer's name"));
+      .AddParameter("identifier", _("Timer's name"), "sceneTimer");
 
   extension
       .AddAction("PauseTimer",
@@ -105,7 +105,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsTimeExtension(
                  "res/actions/pauseTimer24.png",
                  "res/actions/pauseTimer.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("string", _("Timer's name"))
+      .AddParameter("identifier", _("Timer's name"), "sceneTimer")
       .MarkAsAdvanced();
 
   extension
@@ -118,7 +118,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsTimeExtension(
                  "res/actions/unPauseTimer24.png",
                  "res/actions/unPauseTimer.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("string", _("Timer's name"))
+      .AddParameter("identifier", _("Timer's name"), "sceneTimer")
       .MarkAsAdvanced();
 
   extension
@@ -131,12 +131,12 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsTimeExtension(
                  "res/actions/timer24.png",
                  "res/actions/timer.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("string", _("Timer's name"))
+      .AddParameter("identifier", _("Timer's name"), "sceneTimer")
       .MarkAsAdvanced();
 
   extension
       .AddAction("ChangeTimeScale",
-                 _("Change time scale"),
+                 _("Time scale"),
                  _("Change the time scale of the scene."),
                  _("Set the time scale of the scene to _PARAM1_"),
                  "",
@@ -153,8 +153,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsTimeExtension(
                    "the next actions (and sub-events)."),
                  _("Wait _PARAM0_ seconds"),
                  "",
-                 "res/timer.svg",
-                 "res/timer.svg")
+                 "res/timer_black.svg",
+                 "res/timer_black.svg")
       .AddParameter("expression", "Time to wait in seconds")
       .SetHelpPath("/all-features/timers-and-time/wait-action");
 
@@ -191,7 +191,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsTimeExtension(
                      "",
                      "res/actions/time.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("string", _("Timer's name"));
+      .AddParameter("identifier", _("Timer's name"), "sceneTimer");
 
   extension
       .AddExpression("TimeFromStart",

Core/GDCore/Extensions/Builtin/WindowExtension.cpp

@@ -20,6 +20,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsWindowExtension(
           "these features can be applied.",
           "Florian Rival",
           "Open source (MIT License)")
+      .SetCategory("User interface")
       .SetExtensionHelpPath("/all-features/window");
   extension
       .AddInstructionOrExpressionGroupMetadata(
@@ -55,7 +56,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsWindowExtension(
 
   extension
       .AddAction("SetWindowMargins",
-                 _("Change the window's margins"),
+                 _("Window's margins"),
                  _("This action changes the margins, in pixels, between the "
                    "game frame and the window borders."),
                  _("Set margins of game window to "
@@ -71,7 +72,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsWindowExtension(
 
   extension
       .AddAction("SetGameResolutionSize",
-                 _("Change the resolution of the game"),
+                 _("Game resolution"),
                  _("Changes the resolution of the game, effectively changing "
                    "the game area size. This won't change the size of the "
                    "window in which the game is running."),
@@ -117,7 +118,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsWindowExtension(
 
   extension
       .AddAction("SetGameResolutionResizeMode",
-                 _("Change the game resolution resize mode"),
+                 _("Game resolution resize mode"),
                  _("Set if the width or the height of the game resolution "
                    "should be changed to fit the game window - or if the game "
                    "resolution should not be updated automatically."),
@@ -153,7 +154,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsWindowExtension(
 
   extension
       .AddAction("SetWindowIcon",
-                 _("Change the window's icon"),
+                 _("Window's icon"),
                  _("This action changes the icon of the game's window."),
                  _("Use _PARAM1_ as the icon for the game's window."),
                  "",
@@ -164,7 +165,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsWindowExtension(
 
   extension
       .AddAction("SetWindowTitle",
-                 _("Change the window's title"),
+                 _("Window's title"),
                  _("This action changes the title of the game's window."),
                  _("Change window title to _PARAM1_"),
                  "",

Core/GDCore/Extensions/Metadata/BehaviorMetadata.cpp

@@ -14,12 +14,14 @@
 #include "GDCore/Project/Behavior.h"
 #include "GDCore/Project/BehaviorsSharedData.h"
 #include "GDCore/Tools/Localization.h"
+#include "GDCore/Tools/MakeUnique.h"
+#include "GDCore/Tools/Log.h"
 
 namespace gd {
 
 BehaviorMetadata::BehaviorMetadata(
     const gd::String& extensionNamespace_,
-    const gd::String& name_,
+    const gd::String& nameWithNamespace,
     const gd::String& fullname_,
     const gd::String& defaultName_,
     const gd::String& description_,
@@ -29,21 +31,50 @@ BehaviorMetadata::BehaviorMetadata(
     std::shared_ptr<gd::Behavior> instance_,
     std::shared_ptr<gd::BehaviorsSharedData> sharedDatasInstance_)
     : extensionNamespace(extensionNamespace_),
+      className(className_),
+      iconFilename(icon24x24),
       instance(instance_),
-      sharedDatasInstance(sharedDatasInstance_) {
-#if defined(GD_IDE_ONLY)
+      sharedDatasInstance(sharedDatasInstance_),
+      isEventBased(false) {
   SetFullName(gd::String(fullname_));
   SetDescription(gd::String(description_));
   SetDefaultName(gd::String(defaultName_));
   SetGroup(group_);
-  className = className_;
-  iconFilename = icon24x24;
-#endif
 
-  if (instance) instance->SetTypeName(name_);
-  if (sharedDatasInstance) sharedDatasInstance->SetTypeName(name_);
+  if (!instance) {
+    gd::LogFatalError(
+        "Trying to create a BehaviorMetadata that has no "
+        "behavior. This will crash - please double check that the "
+        "BehaviorMetadata is valid for: " + nameWithNamespace);
+  }
+
+  if (instance) instance->SetTypeName(nameWithNamespace);
+  if (sharedDatasInstance) sharedDatasInstance->SetTypeName(nameWithNamespace);
 }
 
+BehaviorMetadata::BehaviorMetadata(
+    const gd::String& extensionNamespace,
+    const gd::String& nameWithNamespace,
+    const gd::String& fullname_,
+    const gd::String& defaultName_,
+    const gd::String& description_,
+    const gd::String& group_,
+    const gd::String& icon24x24_): BehaviorMetadata(
+        extensionNamespace,
+        nameWithNamespace,
+        fullname_,
+        defaultName_,
+        description_,
+        group_,
+        icon24x24_,
+        // Class name is the name, actually unused
+        defaultName_,
+        // It is only used to get the name for GetName.
+        gd::make_unique<gd::Behavior>("", nameWithNamespace),
+        nullptr){
+  isEventBased = true;
+};
+
 gd::InstructionMetadata& BehaviorMetadata::AddCondition(
     const gd::String& name,
     const gd::String& fullname,
@@ -52,7 +83,6 @@ gd::InstructionMetadata& BehaviorMetadata::AddCondition(
     const gd::String& group,
     const gd::String& icon,
     const gd::String& smallicon) {
-#if defined(GD_IDE_ONLY)
   gd::String nameWithNamespace =
       extensionNamespace.empty() ? name : extensionNamespace + name;
   conditionsInfos[nameWithNamespace] = InstructionMetadata(extensionNamespace,
@@ -66,7 +96,6 @@ gd::InstructionMetadata& BehaviorMetadata::AddCondition(
                                            .SetHelpPath(GetHelpPath())
                                            .SetIsBehaviorInstruction();
   return conditionsInfos[nameWithNamespace];
-#endif
 }
 
 gd::InstructionMetadata& BehaviorMetadata::AddAction(
@@ -77,7 +106,6 @@ gd::InstructionMetadata& BehaviorMetadata::AddAction(
     const gd::String& group,
     const gd::String& icon,
     const gd::String& smallicon) {
-#if defined(GD_IDE_ONLY)
   gd::String nameWithNamespace =
       extensionNamespace.empty() ? name : extensionNamespace + name;
   actionsInfos[nameWithNamespace] = InstructionMetadata(extensionNamespace,
@@ -91,7 +119,6 @@ gd::InstructionMetadata& BehaviorMetadata::AddAction(
                                         .SetHelpPath(GetHelpPath())
                                         .SetIsBehaviorInstruction();
   return actionsInfos[nameWithNamespace];
-#endif
 }
 
 gd::InstructionMetadata& BehaviorMetadata::AddScopedCondition(
@@ -102,7 +129,6 @@ gd::InstructionMetadata& BehaviorMetadata::AddScopedCondition(
     const gd::String& group,
     const gd::String& icon,
     const gd::String& smallicon) {
-#if defined(GD_IDE_ONLY)
   gd::String nameWithNamespace =
       GetName() + gd::PlatformExtension::GetNamespaceSeparator() + name;
   conditionsInfos[nameWithNamespace] = InstructionMetadata(extensionNamespace,
@@ -116,7 +142,6 @@ gd::InstructionMetadata& BehaviorMetadata::AddScopedCondition(
                                            .SetHelpPath(GetHelpPath())
                                            .SetIsBehaviorInstruction();
   return conditionsInfos[nameWithNamespace];
-#endif
 }
 
 gd::InstructionMetadata& BehaviorMetadata::AddScopedAction(
@@ -127,7 +152,6 @@ gd::InstructionMetadata& BehaviorMetadata::AddScopedAction(
     const gd::String& group,
     const gd::String& icon,
     const gd::String& smallicon) {
-#if defined(GD_IDE_ONLY)
   gd::String nameWithNamespace =
       GetName() + gd::PlatformExtension::GetNamespaceSeparator() + name;
   actionsInfos[nameWithNamespace] = InstructionMetadata(extensionNamespace,
@@ -141,7 +165,6 @@ gd::InstructionMetadata& BehaviorMetadata::AddScopedAction(
                                         .SetHelpPath(GetHelpPath())
                                         .SetIsBehaviorInstruction();
   return actionsInfos[nameWithNamespace];
-#endif
 }
 
 gd::ExpressionMetadata& BehaviorMetadata::AddExpression(
@@ -150,7 +173,6 @@ gd::ExpressionMetadata& BehaviorMetadata::AddExpression(
     const gd::String& description,
     const gd::String& group,
     const gd::String& smallicon) {
-#if defined(GD_IDE_ONLY)
   // Be careful, behaviors expression do not have namespace (not necessary as
   // we refer to the behavior name in the expression).
   expressionsInfos[name] = ExpressionMetadata("number",
@@ -162,7 +184,6 @@ gd::ExpressionMetadata& BehaviorMetadata::AddExpression(
                                               smallicon)
                                .SetHelpPath(GetHelpPath());
   return expressionsInfos[name];
-#endif
 }
 
 gd::ExpressionMetadata& BehaviorMetadata::AddStrExpression(
@@ -171,7 +192,6 @@ gd::ExpressionMetadata& BehaviorMetadata::AddStrExpression(
     const gd::String& description,
     const gd::String& group,
     const gd::String& smallicon) {
-#if defined(GD_IDE_ONLY)
   // Be careful, behaviors expression do not have namespace (not necessary as
   // we refer to the behavior name in the expression).
   strExpressionsInfos[name] = ExpressionMetadata("string",
@@ -183,7 +203,6 @@ gd::ExpressionMetadata& BehaviorMetadata::AddStrExpression(
                                                  smallicon)
                                   .SetHelpPath(GetHelpPath());
   return strExpressionsInfos[name];
-#endif
 }
 
 gd::MultipleInstructionMetadata BehaviorMetadata::AddExpressionAndCondition(
@@ -288,7 +307,6 @@ BehaviorMetadata::AddExpressionAndConditionAndAction(
       expression, condition, action);
 }
 
-#if defined(GD_IDE_ONLY)
 gd::InstructionMetadata& BehaviorMetadata::AddDuplicatedAction(
     const gd::String& newActionName, const gd::String& copiedActionName) {
   gd::String newNameWithNamespace = extensionNamespace + newActionName;
@@ -356,49 +374,44 @@ gd::ExpressionMetadata& BehaviorMetadata::AddDuplicatedStrExpression(
 
   return strExpressionsInfos[newNameWithNamespace];
 }
-#endif
 
 BehaviorMetadata& BehaviorMetadata::SetFullName(const gd::String& fullname_) {
-#if defined(GD_IDE_ONLY)
   fullname = fullname_;
-#endif
   return *this;
 }
 BehaviorMetadata& BehaviorMetadata::SetDefaultName(
     const gd::String& defaultName_) {
-#if defined(GD_IDE_ONLY)
   defaultName = defaultName_;
-#endif
   return *this;
 }
 BehaviorMetadata& BehaviorMetadata::SetDescription(
     const gd::String& description_) {
-#if defined(GD_IDE_ONLY)
   description = description_;
-#endif
   return *this;
 }
 BehaviorMetadata& BehaviorMetadata::SetGroup(const gd::String& group_) {
-#if defined(GD_IDE_ONLY)
   group = group_;
-#endif
   return *this;
 }
 BehaviorMetadata& BehaviorMetadata::SetIncludeFile(
     const gd::String& includeFile) {
-#if defined(GD_IDE_ONLY)
   includeFiles.clear();
   includeFiles.push_back(includeFile);
-#endif
   return *this;
 }
 BehaviorMetadata& BehaviorMetadata::AddIncludeFile(
     const gd::String& includeFile) {
-#if defined(GD_IDE_ONLY)
   if (std::find(includeFiles.begin(), includeFiles.end(), includeFile) ==
       includeFiles.end())
     includeFiles.push_back(includeFile);
-#endif
+  return *this;
+}
+
+BehaviorMetadata& BehaviorMetadata::AddRequiredFile(
+    const gd::String& requiredFile) {
+  if (std::find(requiredFiles.begin(), requiredFiles.end(), requiredFile) ==
+      requiredFiles.end())
+    requiredFiles.push_back(requiredFile);
   return *this;
 }
 
@@ -407,13 +420,25 @@ const gd::String& BehaviorMetadata::GetName() const {
 }
 
 gd::Behavior& BehaviorMetadata::Get() const {
-  if (!instance)
+  if (isEventBased) {
+    gd::LogFatalError("Error: Event-based behaviors don't have blueprint. "
+                      "This method should not never be called.");
+  }
+  if (!instance) {
     gd::LogFatalError(
         "Trying to get a behavior from a BehaviorMetadata that has no "
         "behavior. This will crash - please double check that the "
-        "BehaviorMetadata is valid.");
-
+        "BehaviorMetadata is valid for: " + className);
+  }
   return *instance;
 }
 
+gd::BehaviorsSharedData* BehaviorMetadata::GetSharedDataInstance() const { 
+  if (isEventBased) {
+    gd::LogFatalError("Error: Event-based behaviors don't have blueprint. "
+                      "This method should not never be called.");
+  }
+  return sharedDatasInstance.get();
+}
+
 }  // namespace gd

Core/GDCore/Extensions/Metadata/BehaviorMetadata.h

@@ -29,7 +29,7 @@ class GD_CORE_API BehaviorMetadata {
  public:
   BehaviorMetadata(
       const gd::String& extensionNamespace,
-      const gd::String& name_,
+      const gd::String& nameWithNamespace,
       const gd::String& fullname_,
       const gd::String& defaultName_,
       const gd::String& description_,
@@ -38,6 +38,21 @@ class GD_CORE_API BehaviorMetadata {
       const gd::String& className_,
       std::shared_ptr<gd::Behavior> instance,
       std::shared_ptr<gd::BehaviorsSharedData> sharedDatasInstance);
+      
+  /**
+   * \brief Construct a behavior metadata, without "blueprint" behavior.
+   * 
+   * \note This is used by events based behaviors.
+   */
+  BehaviorMetadata(
+      const gd::String& extensionNamespace,
+      const gd::String& nameWithNamespace,
+      const gd::String& fullname_,
+      const gd::String& defaultName_,
+      const gd::String& description_,
+      const gd::String& group_,
+      const gd::String& icon24x24_);
+
   BehaviorMetadata(){};
   virtual ~BehaviorMetadata(){};
 
@@ -195,6 +210,13 @@ class GD_CORE_API BehaviorMetadata {
    */
   BehaviorMetadata& AddIncludeFile(const gd::String& includeFile);
 
+  /**
+   * \brief Add a file to the already existing required files.
+   * \note These files are required for the behavior to work,
+   * but they are not executable.
+   */
+  BehaviorMetadata& AddRequiredFile(const gd::String& requiredFile);
+
   /**
    * Get the help path of the behavior, relative to the GDevelop documentation
    * root.
@@ -239,16 +261,20 @@ class GD_CORE_API BehaviorMetadata {
 
   /**
    * \brief Return the associated gd::Behavior, handling behavior contents.
+   * 
+   * \note Returns a dumb Behavior for events based behaviors as CustomBehavior
+   * are using EventBasedBehavior.
    */
   gd::Behavior& Get() const;
 
   /**
    * \brief Return the associated gd::BehaviorsSharedData, handling behavior
    * shared data, if any (nullptr if none).
+   * 
+   * \note Returns nullptr for events based behaviors as they don't declare
+   * shared data yet.
    */
-  gd::BehaviorsSharedData* GetSharedDataInstance() const {
-    return sharedDatasInstance.get();
-  }
+  gd::BehaviorsSharedData* GetSharedDataInstance() const;
 
   /**
    * \brief Return a reference to a map containing the names of the actions
@@ -271,30 +297,29 @@ class GD_CORE_API BehaviorMetadata {
    */
   std::map<gd::String, gd::ExpressionMetadata>& GetAllStrExpressions() { return strExpressionsInfos; };
 
-#if defined(GD_IDE_ONLY)
   std::map<gd::String, gd::InstructionMetadata> conditionsInfos;
   std::map<gd::String, gd::InstructionMetadata> actionsInfos;
   std::map<gd::String, gd::ExpressionMetadata> expressionsInfos;
   std::map<gd::String, gd::ExpressionMetadata> strExpressionsInfos;
 
   std::vector<gd::String> includeFiles;
+  std::vector<gd::String> requiredFiles;
   gd::String className;
-#endif
+
  private:
   gd::String extensionNamespace;
   gd::String helpPath;
-#if defined(GD_IDE_ONLY)
   gd::String fullname;
   gd::String defaultName;
   gd::String description;
   gd::String group;
   gd::String iconFilename;
   gd::String objectType;
-#endif
 
   // TODO: Nitpicking: convert these to std::unique_ptr to clarify ownership.
   std::shared_ptr<gd::Behavior> instance;
   std::shared_ptr<gd::BehaviorsSharedData> sharedDatasInstance;
+  bool isEventBased;
 };
 
 }  // namespace gd

Core/GDCore/Extensions/Metadata/ExpressionMetadata.cpp

@@ -37,22 +37,24 @@ gd::ExpressionMetadata& ExpressionMetadata::AddParameter(
     const gd::String& supplementaryInformation,
     bool parameterIsOptional) {
   gd::ParameterMetadata info;
-  info.type = type;
+  info.SetType(type);
   info.description = description;
   info.codeOnly = false;
-  info.optional = parameterIsOptional;
-  info.supplementaryInformation =
+  info.SetOptional(parameterIsOptional);
+  info.SetExtraInfo(
       // For objects/behavior, the supplementary information
       // parameter is an object/behavior type...
-      (gd::ParameterMetadata::IsObject(type) ||
+      ((gd::ParameterMetadata::IsObject(type) ||
        gd::ParameterMetadata::IsBehavior(type))
+       // Prefix with the namespace if it's not already there.
+       && !(supplementaryInformation.rfind(extensionNamespace, 0) == 0))
           ? (supplementaryInformation.empty()
                  ? ""
                  : extensionNamespace +
                        supplementaryInformation  //... so prefix it with the extension
                                            // namespace.
              )
-          : supplementaryInformation;  // Otherwise don't change anything
+          : supplementaryInformation);  // Otherwise don't change anything
 
   // TODO: Assert against supplementaryInformation === "emsc" (when running with
   // Emscripten), and warn about a missing argument when calling addParameter.
@@ -64,9 +66,9 @@ gd::ExpressionMetadata& ExpressionMetadata::AddParameter(
 gd::ExpressionMetadata& ExpressionMetadata::AddCodeOnlyParameter(
     const gd::String& type, const gd::String& supplementaryInformation) {
   gd::ParameterMetadata info;
-  info.type = type;
+  info.SetType(type);
   info.codeOnly = true;
-  info.supplementaryInformation = supplementaryInformation;
+  info.SetExtraInfo(supplementaryInformation);
 
   parameters.push_back(info);
   return *this;

Core/GDCore/Extensions/Metadata/ExpressionMetadata.h

@@ -222,6 +222,18 @@ class GD_CORE_API ExpressionMetadata {
     return *this;
   };
 
+  /**
+   * \brief Set the additional information, used for some parameters
+   * with special type (for example, it can contains the type of object accepted
+   * by the parameter), for the last added parameter.
+   *
+   * \see AddParameter
+   */
+  ExpressionMetadata &SetParameterExtraInfo(const gd::String &extraInfo) {
+    if (!parameters.empty()) parameters.back().SetExtraInfo(extraInfo);
+    return *this;
+  }
+
   /**
    * \brief Mark this (object) expression as requiring the specified capability,
    * offered by the base object.
@@ -256,7 +268,30 @@ class GD_CORE_API ExpressionMetadata {
    */
   ExpressionCodeGenerationInformation& GetCodeExtraInformation() {
     return codeExtraInformation;
-  };
+  }
+
+  /**
+   * \brief Erase any existing include file and add the specified include.
+   */
+  ExpressionMetadata &SetIncludeFile(const gd::String &includeFile) {
+    codeExtraInformation.SetIncludeFile(includeFile);
+    return *this;
+  }
+
+  /**
+   * \brief Add a file to the already existing include files.
+   */
+  ExpressionMetadata &AddIncludeFile(const gd::String &includeFile) {
+    codeExtraInformation.AddIncludeFile(includeFile);
+    return *this;
+  }
+
+  /**
+   * \brief Get the files that must be included to use the instruction.
+   */
+  const std::vector<gd::String>& GetIncludeFiles() const {
+    return codeExtraInformation.GetIncludeFiles();
+  }
 
   ExpressionCodeGenerationInformation codeExtraInformation;
 

Core/GDCore/Extensions/Metadata/InstructionMetadata.cpp

@@ -55,15 +55,17 @@ InstructionMetadata& InstructionMetadata::AddParameter(
     const gd::String& supplementaryInformation,
     bool parameterIsOptional) {
   ParameterMetadata info;
-  info.type = type;
+  info.SetType(type);
   info.description = description;
   info.codeOnly = false;
-  info.optional = parameterIsOptional;
-  info.supplementaryInformation =
+  info.SetOptional(parameterIsOptional);
+  info.SetExtraInfo(
       // For objects/behavior, the supplementary information
       // parameter is an object/behavior type...
-      (gd::ParameterMetadata::IsObject(type) ||
+      ((gd::ParameterMetadata::IsObject(type) ||
        gd::ParameterMetadata::IsBehavior(type))
+       // Prefix with the namespace if it's not already there.
+       && !(supplementaryInformation.rfind(extensionNamespace, 0) == 0))
           ? (supplementaryInformation.empty()
                  ? ""
                  : extensionNamespace +
@@ -71,7 +73,7 @@ InstructionMetadata& InstructionMetadata::AddParameter(
                                                  // extension
                                                  // namespace.
              )
-          : supplementaryInformation;  // Otherwise don't change anything
+          : supplementaryInformation);  // Otherwise don't change anything
 
   // TODO: Assert against supplementaryInformation === "emsc" (when running with
   // Emscripten), and warn about a missing argument when calling addParameter.
@@ -83,17 +85,19 @@ InstructionMetadata& InstructionMetadata::AddParameter(
 InstructionMetadata& InstructionMetadata::AddCodeOnlyParameter(
     const gd::String& type, const gd::String& supplementaryInformation) {
   ParameterMetadata info;
-  info.type = type;
+  info.SetType(type);
   info.codeOnly = true;
-  info.supplementaryInformation = supplementaryInformation;
+  info.SetExtraInfo(supplementaryInformation);
 
   parameters.push_back(info);
   return *this;
 }
 
 InstructionMetadata& InstructionMetadata::UseStandardOperatorParameters(
-    const gd::String& type) {
-  SetManipulatedType(type);
+    const gd::String& type, const gd::String& typeExtraInfo) {
+  const gd::String& expressionValueType =
+      gd::ValueTypeMetadata::GetPrimitiveValueType(type);
+  SetManipulatedType(expressionValueType);
 
   if (type == "boolean") {
     AddParameter("yesorno", _("New value"));
@@ -117,8 +121,8 @@ InstructionMetadata& InstructionMetadata::UseStandardOperatorParameters(
                               "_PARAM" + gd::String::From(valueParamIndex) + "_");
     }
   } else {
-    AddParameter("operator", _("Modification's sign"), type);
-    AddParameter(type == "number" ? "expression" : type, _("Value"));
+    AddParameter("operator", _("Modification's sign"), expressionValueType);
+    AddParameter(type, _("Value"), typeExtraInfo);
 
     size_t operatorParamIndex = parameters.size() - 2;
     size_t valueParamIndex = parameters.size() - 1;
@@ -151,8 +155,10 @@ InstructionMetadata& InstructionMetadata::UseStandardOperatorParameters(
 
 InstructionMetadata&
 InstructionMetadata::UseStandardRelationalOperatorParameters(
-    const gd::String& type) {
-  SetManipulatedType(type);
+    const gd::String& type, const gd::String& typeExtraInfo) {
+  const gd::String& expressionValueType =
+      gd::ValueTypeMetadata::GetPrimitiveValueType(type);
+  SetManipulatedType(expressionValueType);
 
   if (type == "boolean") {
     if (isObjectInstruction || isBehaviorInstruction) {
@@ -168,8 +174,8 @@ InstructionMetadata::UseStandardRelationalOperatorParameters(
           templateSentence.FindAndReplace("<subject>", sentence);
     }
   } else {
-    AddParameter("relationalOperator", _("Sign of the test"), type);
-    AddParameter(type == "number" ? "expression" : type, _("Value to compare"));
+    AddParameter("relationalOperator", _("Sign of the test"), expressionValueType);
+    AddParameter(type, _("Value to compare"), typeExtraInfo);
     size_t operatorParamIndex = parameters.size() - 2;
     size_t valueParamIndex = parameters.size() - 1;
 

Core/GDCore/Extensions/Metadata/InstructionMetadata.h

@@ -206,7 +206,7 @@ class GD_CORE_API InstructionMetadata {
     if (!parameters.empty())
       parameters.back().SetLongDescription(longDescription);
     return *this;
-  };
+  }
 
   /**
    * \brief Set the additional information, used for some parameters
@@ -218,20 +218,26 @@ class GD_CORE_API InstructionMetadata {
   InstructionMetadata &SetParameterExtraInfo(const gd::String &extraInfo) {
     if (!parameters.empty()) parameters.back().SetExtraInfo(extraInfo);
     return *this;
-  };
+  }
 
   /**
    * \brief Add the default parameters for an instruction manipulating the
    * specified type ("string", "number") with the default operators.
+   * 
+   * \note The type "string" can be declined in several subtypes.
+   * \see ParameterMetadata
    */
-  InstructionMetadata &UseStandardOperatorParameters(const gd::String &type);
+  InstructionMetadata &UseStandardOperatorParameters(const gd::String &type, const gd::String& typeExtraInfo = "");
 
   /**
    * \brief Add the default parameters for an instruction comparing the
    * specified type ("string", "number") with the default relational operators.
+   * 
+   * \note The type "string" can be declined in several subtypes.
+   * \see ParameterMetadata
    */
   InstructionMetadata &UseStandardRelationalOperatorParameters(
-      const gd::String &type);
+      const gd::String &type, const gd::String& typeExtraInfo = "");
 
   /**
    * \brief Mark the instruction as an object instruction. Automatically called
@@ -276,7 +282,7 @@ class GD_CORE_API InstructionMetadata {
    */
   const gd::String &GetRequiredBaseObjectCapability() const {
     return requiredBaseObjectCapability;
-  };
+  }
 
   /**
    * \brief Consider that the instruction is easy for a user to understand.
@@ -361,7 +367,7 @@ class GD_CORE_API InstructionMetadata {
      *                 _("the string"),
      *                 _("Text"),
      *                 "CppPlatform/Extensions/text24.png",
-     *                 "CppPlatform/Extensions/text.png");
+     *                 "CppPlatform/Extensions/text_black.png");
      *
      *      .AddParameter("object", _("Object"), "Text", false)
      *      .AddParameter("operator", _("Modification operator"), "string")
@@ -487,6 +493,29 @@ class GD_CORE_API InstructionMetadata {
     return codeExtraInformation.SetAsyncFunctionName(functionName);
   }
 
+  /**
+   * \brief Erase any existing include file and add the specified include.
+   */
+  InstructionMetadata &SetIncludeFile(const gd::String &includeFile) {
+    codeExtraInformation.SetIncludeFile(includeFile);
+    return *this;
+  }
+
+  /**
+   * \brief Add a file to the already existing include files.
+   */
+  InstructionMetadata &AddIncludeFile(const gd::String &includeFile) {
+    codeExtraInformation.AddIncludeFile(includeFile);
+    return *this;
+  }
+
+  /**
+   * \brief Get the files that must be included to use the instruction.
+   */
+  const std::vector<gd::String>& GetIncludeFiles() const {
+    return codeExtraInformation.GetIncludeFiles();
+  };
+
   std::vector<ParameterMetadata> parameters;
 
  private:

Core/GDCore/Extensions/Metadata/MultipleInstructionMetadata.h

@@ -80,6 +80,16 @@ class GD_CORE_API MultipleInstructionMetadata {
     return *this;
   };
 
+  /**
+   * \see gd::InstructionMetadata::SetParameterExtraInfo
+   */
+  MultipleInstructionMetadata &SetParameterExtraInfo(const gd::String &defaultValue) {
+    if (expression) expression->SetParameterExtraInfo(defaultValue);
+    if (condition) condition->SetParameterExtraInfo(defaultValue);
+    if (action) action->SetParameterExtraInfo(defaultValue);
+    return *this;
+  };
+
   /**
    * \see gd::InstructionMetadata::SetParameterLongDescription
    */
@@ -116,9 +126,9 @@ class GD_CORE_API MultipleInstructionMetadata {
    * \see gd::InstructionMetadata::UseStandardOperatorParameters
    * \see gd::InstructionMetadata::UseStandardRelationalOperatorParameters
    */
-  MultipleInstructionMetadata &UseStandardParameters(const gd::String &type) {
-    if (condition) condition->UseStandardRelationalOperatorParameters(type);
-    if (action) action->UseStandardOperatorParameters(type);
+  MultipleInstructionMetadata &UseStandardParameters(const gd::String &type, const gd::String& typeExtraInfo = "") {
+    if (condition) condition->UseStandardRelationalOperatorParameters(type, typeExtraInfo);
+    if (action) action->UseStandardOperatorParameters(type, typeExtraInfo);
     return *this;
   }
 
@@ -154,6 +164,34 @@ class GD_CORE_API MultipleInstructionMetadata {
     return *this;
   }
 
+  /**
+   * \brief Get the files that must be included to use the instruction.
+   */
+  const std::vector<gd::String>& GetIncludeFiles() const {
+    if (expression)
+      return expression->GetCodeExtraInformation().GetIncludeFiles();
+    if (condition)
+      return condition->GetCodeExtraInformation().GetIncludeFiles();
+    if (action)
+      return action->GetCodeExtraInformation().GetIncludeFiles();
+    // It can't actually happen.
+    throw std::logic_error("no instruction metadata");
+  }
+
+  /**
+   * Set that the instruction is private - it can't be used outside of the
+   * object/ behavior that it is attached too.
+   */
+  MultipleInstructionMetadata &SetPrivate() {
+    if (expression)
+      expression->SetPrivate();
+    if (condition)
+      condition->SetPrivate();
+    if (action)
+      action->SetPrivate();
+    return *this;
+  }
+
   /**
    * \see gd::InstructionMetadata::MarkAsSimple
    */

Core/GDCore/Extensions/Metadata/ObjectMetadata.cpp

@@ -14,6 +14,7 @@
 #include "GDCore/Extensions/PlatformExtension.h"
 #include "GDCore/Project/Object.h"
 #include "GDCore/Tools/Localization.h"
+#include "GDCore/Tools/Log.h"
 
 namespace gd {
 
@@ -22,45 +23,53 @@ ObjectMetadata::ObjectMetadata(const gd::String& extensionNamespace_,
                                const gd::String& fullname_,
                                const gd::String& description_,
                                const gd::String& icon24x24,
-                               std::shared_ptr<gd::Object> blueprintObject_)
-    : extensionNamespace(extensionNamespace_),
-      blueprintObject(blueprintObject_) {
-  name = name_;
-#if defined(GD_IDE_ONLY)
-  SetFullName(gd::String(fullname_));
-  SetDescription(gd::String(description_));
-  iconFilename = icon24x24;
-#endif
-  createFunPtr =
-      [blueprintObject_](gd::String name) -> std::unique_ptr<gd::Object> {
-    if (blueprintObject_ == std::shared_ptr<gd::Object>()) {
-      std::cout
-          << "Error: Unable to create object. Have you declared an extension "
-             "(or ObjectMetadata) without specifying an object as blueprint?"
-          << std::endl;
+                               std::shared_ptr<gd::ObjectConfiguration> blueprintObject_)
+    : ObjectMetadata(extensionNamespace_,
+                     name_,
+                     fullname_,
+                     description_,
+                     icon24x24,
+                     [blueprintObject_]() -> std::unique_ptr<gd::ObjectConfiguration> {
+    if (blueprintObject_ == std::shared_ptr<gd::ObjectConfiguration>()) {
+      gd::LogFatalError(
+          "Error: Unable to create object. Have you declared an extension "
+          "(or ObjectMetadata) without specifying an object as blueprint?");
       return nullptr;
     }
-
-    std::unique_ptr<gd::Object> newObject = blueprintObject_->Clone();
-    newObject->SetName(name);
-    return newObject;
-  };
+    return blueprintObject_->Clone();
+  }) {
+  blueprintObject = blueprintObject_;
 }
 
+ObjectMetadata::ObjectMetadata(const gd::String& extensionNamespace_,
+                               const gd::String& name_,
+                               const gd::String& fullname_,
+                               const gd::String& description_,
+                               const gd::String& icon24x24)
+    : ObjectMetadata(extensionNamespace_,
+                     name_,
+                     fullname_,
+                     description_,
+                     icon24x24,
+                     []() -> std::unique_ptr<gd::ObjectConfiguration> {
+      gd::LogFatalError(
+          "Error: Event-based objects don't have blueprint. "
+          "This method should not never be called.");
+      return nullptr;
+    }) {}
+
 ObjectMetadata::ObjectMetadata(const gd::String& extensionNamespace_,
                                const gd::String& name_,
                                const gd::String& fullname_,
                                const gd::String& description_,
                                const gd::String& icon24x24,
                                CreateFunPtr createFunPtrP)
-    : extensionNamespace(extensionNamespace_) {
-  name = name_;
-#if defined(GD_IDE_ONLY)
+    : name(name_),
+      iconFilename(icon24x24),
+      createFunPtr(createFunPtrP),
+      extensionNamespace(extensionNamespace_) {
   SetFullName(gd::String(fullname_));
   SetDescription(gd::String(description_));
-  iconFilename = icon24x24;
-#endif
-  createFunPtr = createFunPtrP;
 }
 
 gd::InstructionMetadata& ObjectMetadata::AddCondition(

Core/GDCore/Extensions/Metadata/ObjectMetadata.h

@@ -13,6 +13,7 @@
 #include "GDCore/Extensions/Metadata/ExpressionMetadata.h"
 #include "GDCore/Extensions/Metadata/InstructionMetadata.h"
 #include "GDCore/Project/Object.h"
+#include "GDCore/Project/ObjectConfiguration.h"
 #include "GDCore/String.h"
 namespace gd {
 class InstructionMetadata;
@@ -20,7 +21,7 @@ class MultipleInstructionMetadata;
 class ExpressionMetadata;
 }  // namespace gd
 
-typedef std::function<std::unique_ptr<gd::Object>(gd::String name)>
+typedef std::function<std::unique_ptr<gd::ObjectConfiguration>()>
     CreateFunPtr;
 
 namespace gd {
@@ -42,7 +43,17 @@ class GD_CORE_API ObjectMetadata {
                  const gd::String& fullname_,
                  const gd::String& description_,
                  const gd::String& icon24x24_,
-                 std::shared_ptr<gd::Object> blueprintObject_);
+                 std::shared_ptr<gd::ObjectConfiguration> blueprintObject_);
+  /**
+   * \brief Construct an object metadata, without "blueprint" object
+   * 
+   * \note This is used by events based objects.
+   */
+  ObjectMetadata(const gd::String& extensionNamespace_,
+                 const gd::String& name_,
+                 const gd::String& fullname_,
+                 const gd::String& description_,
+                 const gd::String& icon24x24_);
 
   /**
    * \brief Construct an object metadata, with a function that will be called
@@ -304,10 +315,12 @@ class GD_CORE_API ObjectMetadata {
   gd::String categoryFullName;
   std::set<gd::String> unsupportedBaseObjectCapabilities;
 
-  std::shared_ptr<gd::Object>
+  std::shared_ptr<gd::ObjectConfiguration>
       blueprintObject;  ///< The "blueprint" object to be copied when a new
                         ///< object is asked. Can be null in case a creation
-                        ///< function is passed.
+                        ///< function is passed or for events based objects
+                        ///< (CustomObject are using EventBasedObject, they
+                        ///< don't need blueprints).
 };
 
 }  // namespace gd

Core/GDCore/Extensions/Metadata/ParameterMetadata.cpp

@@ -10,12 +10,10 @@
 
 namespace gd {
 
-ParameterMetadata::ParameterMetadata() : optional(false), codeOnly(false) {}
+ParameterMetadata::ParameterMetadata() : codeOnly(false) {}
 
 void ParameterMetadata::SerializeTo(SerializerElement& element) const {
-  element.SetAttribute("type", type);
-  element.SetAttribute("supplementaryInformation", supplementaryInformation);
-  element.SetAttribute("optional", optional);
+  valueTypeMetadata.SerializeTo(element);
   element.SetAttribute("description", description);
   element.SetAttribute("longDescription", longDescription);
   element.SetAttribute("codeOnly", codeOnly);
@@ -24,10 +22,7 @@ void ParameterMetadata::SerializeTo(SerializerElement& element) const {
 }
 
 void ParameterMetadata::UnserializeFrom(const SerializerElement& element) {
-  type = element.GetStringAttribute("type");
-  supplementaryInformation =
-      element.GetStringAttribute("supplementaryInformation");
-  optional = element.GetBoolAttribute("optional");
+  valueTypeMetadata.UnserializeFrom(element);
   description = element.GetStringAttribute("description");
   longDescription = element.GetStringAttribute("longDescription");
   codeOnly = element.GetBoolAttribute("codeOnly");
@@ -35,18 +30,4 @@ void ParameterMetadata::UnserializeFrom(const SerializerElement& element) {
   name = element.GetStringAttribute("name");
 }
 
-  // TODO factorize in a file with an enum and helpers?
-  const gd::String ParameterMetadata::numberType = "number";
-  const gd::String ParameterMetadata::stringType = "string";
-
-  const gd::String &ParameterMetadata::GetExpressionValueType(const gd::String &parameterType) {
-    if (parameterType == "number" || gd::ParameterMetadata::IsExpression("number", parameterType)) {
-      return ParameterMetadata::numberType;
-    }
-    if (parameterType == "string" || gd::ParameterMetadata::IsExpression("string", parameterType)) {
-      return ParameterMetadata::stringType;
-    }
-    return parameterType;
-  }
-
 }  // namespace gd

Core/GDCore/Extensions/Metadata/ParameterMetadata.h

@@ -6,16 +6,13 @@
 
 #ifndef PARAMETER_METADATA_H
 #define PARAMETER_METADATA_H
-#if defined(GD_IDE_ONLY)
 #include <map>
 #include <memory>
 
 #include "GDCore/String.h"
+#include "GDCore/Extensions/Metadata/ValueTypeMetadata.h"
+
 namespace gd {
-class Project;
-class Layout;
-class EventsCodeGenerator;
-class EventsCodeGenerationContext;
 class SerializerElement;
 }  // namespace gd
 
@@ -32,17 +29,32 @@ class GD_CORE_API ParameterMetadata {
   ParameterMetadata();
   virtual ~ParameterMetadata(){};
 
+  /**
+   * \brief Return the metadata of the parameter type.
+   */
+  gd::ValueTypeMetadata &GetValueTypeMetadata() { return valueTypeMetadata; }
+
+  /**
+   * \brief Set the metadata of the parameter type.
+   */
+  ParameterMetadata &SetValueTypeMetadata(const gd::ValueTypeMetadata &valueTypeMetadata_) {
+    valueTypeMetadata = valueTypeMetadata_;
+    return *this;
+  }
+
   /**
    * \brief Return the type of the parameter.
    * \see gd::ParameterMetadata::IsObject
+   * \deprecated Use gd::ValueTypeMetadata instead.
    */
-  const gd::String &GetType() const { return type; }
+  const gd::String &GetType() const { return valueTypeMetadata.GetName(); }
 
   /**
    * \brief Set the type of the parameter.
+   * \deprecated Use gd::ValueTypeMetadata instead.
    */
   ParameterMetadata &SetType(const gd::String &type_) {
-    type = type_;
+    valueTypeMetadata.SetName(type_);
     return *this;
   }
 
@@ -71,29 +83,33 @@ class GD_CORE_API ParameterMetadata {
    * \brief Return an optional additional information, used for some parameters
    * with special type (for example, it can contains the type of object accepted
    * by the parameter).
+   * \deprecated Use gd::ValueTypeMetadata instead.
    */
-  const gd::String &GetExtraInfo() const { return supplementaryInformation; }
+  const gd::String &GetExtraInfo() const { return valueTypeMetadata.GetExtraInfo(); }
 
   /**
    * \brief Set an optional additional information, used for some parameters
    * with special type (for example, it can contains the type of object accepted
    * by the parameter).
+   * \deprecated Use gd::ValueTypeMetadata instead.
    */
   ParameterMetadata &SetExtraInfo(const gd::String &supplementaryInformation_) {
-    supplementaryInformation = supplementaryInformation_;
+    valueTypeMetadata.SetExtraInfo(supplementaryInformation_);
     return *this;
   }
 
   /**
    * \brief Return true if the parameter is optional.
+   * \deprecated Use gd::ValueTypeMetadata instead.
    */
-  bool IsOptional() const { return optional; }
+  bool IsOptional() const { return valueTypeMetadata.IsOptional(); }
 
   /**
    * \brief Set if the parameter is optional.
+   * \deprecated Use gd::ValueTypeMetadata instead.
    */
   ParameterMetadata &SetOptional(bool optional_ = true) {
-    optional = optional_;
+    valueTypeMetadata.SetOptional(optional_);
     return *this;
   }
 
@@ -151,26 +167,27 @@ class GD_CORE_API ParameterMetadata {
     return *this;
   }
 
+  // TODO Remove these deprecated functions.
+
   /**
    * \brief Return true if the type of the parameter is representing one object
    * (or more, i.e: an object group).
    *
    * \see gd::ParameterMetadata::GetType
+   * \deprecated Use gd::ValueTypeMetadata instead.
    */
   static bool IsObject(const gd::String &parameterType) {
-    return parameterType == "object" || parameterType == "objectPtr" ||
-           parameterType == "objectList" ||
-           parameterType == "objectListOrEmptyIfJustDeclared" ||
-           parameterType == "objectListOrEmptyWithoutPicking";
+    return gd::ValueTypeMetadata::IsTypeObject(parameterType);
   }
 
   /**
    * \brief Return true if the type of the parameter is "behavior".
    *
    * \see gd::ParameterMetadata::GetType
+   * \deprecated Use gd::ValueTypeMetadata instead.
    */
   static bool IsBehavior(const gd::String &parameterType) {
-    return parameterType == "behavior";
+    return gd::ValueTypeMetadata::IsTypeBehavior(parameterType);
   }
 
   /**
@@ -179,42 +196,22 @@ class GD_CORE_API ParameterMetadata {
    * \note If you had a new type of parameter, also add it in the IDE (
    * see EventsFunctionParametersEditor, ParameterRenderingService
    * and ExpressionAutocompletion) and in the EventsCodeGenerator.
+   * \deprecated Use gd::ValueTypeMetadata instead.
    */
   static bool IsExpression(const gd::String &type,
                            const gd::String &parameterType) {
-    if (type == "number") {
-      return parameterType == "expression" || parameterType == "camera" ||
-             parameterType == "forceMultiplier";
-    } else if (type == "string") {
-      return parameterType == "string" || parameterType == "layer" ||
-             parameterType == "color" || parameterType == "file" ||
-             parameterType == "joyaxis" ||
-             parameterType == "stringWithSelector" ||
-             parameterType == "sceneName" ||
-             parameterType == "layerEffectName" ||
-             parameterType == "layerEffectParameterName" ||
-             parameterType == "objectEffectName" ||
-             parameterType == "objectEffectParameterName" ||
-             parameterType == "objectPointName" ||
-             parameterType == "objectAnimationName" ||
-             parameterType == "functionParameterName" ||
-             parameterType == "externalLayoutName" ||
-             parameterType == "leaderboardId";
-    } else if (type == "variable") {
-      return parameterType == "objectvar" || parameterType == "globalvar" ||
-             parameterType == "scenevar";
-    }
-    return false;
+    return gd::ValueTypeMetadata::IsTypeExpression(type, parameterType);
   }
 
   /**
    * \brief Return the expression type from the parameter type.
    * Declinations of "number" and "string" types (like "forceMultiplier" or
    * "sceneName") are replaced by "number" and "string".
+   * \deprecated Use gd::ValueTypeMetadata instead.
    */
-  static const gd::String &GetExpressionValueType(const gd::String &parameterType);
-  static const gd::String numberType;
-  static const gd::String stringType;
+  static const gd::String &GetExpressionValueType(const gd::String &parameterType) {
+    return gd::ValueTypeMetadata::GetPrimitiveValueType(parameterType);
+  }
 
   /** \name Serialization
    */
@@ -232,14 +229,12 @@ class GD_CORE_API ParameterMetadata {
 
   // TODO: Deprecated public fields. Any direct usage should be moved to
   // getter/setter.
-  gd::String type;                      ///< Parameter type
-  gd::String supplementaryInformation;  ///< Used if needed
-  bool optional;                        ///< True if the parameter is optional
 
   gd::String description;  ///< Description shown in editor
   bool codeOnly;  ///< True if parameter is relative to code generation only,
                   ///< i.e. must not be shown in editor
  private:
+  gd::ValueTypeMetadata valueTypeMetadata; ///< Parameter type
   gd::String longDescription;  ///< Long description shown in the editor.
   gd::String defaultValue;     ///< Used as a default value in editor or if an
                                ///< optional parameter is empty.
@@ -249,5 +244,4 @@ class GD_CORE_API ParameterMetadata {
 
 }  // namespace gd
 
-#endif
 #endif  // PARAMETER_METADATA_H

Core/GDCore/Extensions/Metadata/ParameterMetadataTools.cpp

@@ -85,7 +85,7 @@ void ParameterMetadataTools::IterateOverParametersWithIndex(
     const gd::Expression& parameterValue =
         pNb < parameters.size() ? parameters[pNb].GetPlainString() : "";
     const gd::Expression& parameterValueOrDefault =
-        parameterValue.GetPlainString().empty() && parameterMetadata.optional
+        parameterValue.GetPlainString().empty() && parameterMetadata.IsOptional()
             ? Expression(parameterMetadata.GetDefaultValue())
             : parameterValue;
 

Core/GDCore/Extensions/Metadata/ValueTypeMetadata.cpp

@@ -0,0 +1,49 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#include "ValueTypeMetadata.h"
+
+#include "GDCore/CommonTools.h"
+#include "GDCore/Serialization/SerializerElement.h"
+
+namespace gd {
+
+ValueTypeMetadata::ValueTypeMetadata() : optional(false) {}
+
+void ValueTypeMetadata::SerializeTo(SerializerElement& element) const {
+  element.SetAttribute("type", name);
+  if (!supplementaryInformation.empty()) {
+    element.SetAttribute("supplementaryInformation", supplementaryInformation);
+  }
+  if (optional) {
+    element.SetAttribute("optional", optional);
+  }
+  if (!defaultValue.empty()) {
+    element.SetAttribute("defaultValue", defaultValue);
+  }
+}
+
+void ValueTypeMetadata::UnserializeFrom(const SerializerElement& element) {
+  name = element.GetStringAttribute("type");
+  supplementaryInformation =
+      element.GetStringAttribute("supplementaryInformation");
+  optional = element.GetBoolAttribute("optional");
+  defaultValue = element.GetStringAttribute("defaultValue");
+}
+
+const gd::String ValueTypeMetadata::numberType = "number";
+const gd::String ValueTypeMetadata::stringType = "string";
+
+const gd::String &ValueTypeMetadata::GetPrimitiveValueType(const gd::String &parameterType) {
+  if (parameterType == "number" || gd::ValueTypeMetadata::IsTypeExpression("number", parameterType)) {
+    return ValueTypeMetadata::numberType;
+  }
+  if (parameterType == "string" || gd::ValueTypeMetadata::IsTypeExpression("string", parameterType)) {
+    return ValueTypeMetadata::stringType;
+  }
+  return parameterType;
+}
+
+}  // namespace gd

Core/GDCore/Extensions/Metadata/ValueTypeMetadata.h

@@ -0,0 +1,219 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+
+#ifndef VALUE_TYPE_METADATA_H
+#define VALUE_TYPE_METADATA_H
+#include <map>
+#include <memory>
+
+#include "GDCore/String.h"
+namespace gd {
+class SerializerElement;
+}  // namespace gd
+
+namespace gd {
+
+/**
+ * \brief Define a type for parameters of a function (action, condition or
+ * expression) or the returned value of an expression.
+ *
+ * \see gd::EventsFunction
+ * \ingroup Events
+ */
+class GD_CORE_API ValueTypeMetadata {
+ public:
+  ValueTypeMetadata();
+  virtual ~ValueTypeMetadata(){};
+
+  /**
+   * \brief Return the string representation of the type.
+   */
+  const gd::String &GetName() const { return name; }
+
+  /**
+   * \brief Set the string representation of the type.
+   */
+  ValueTypeMetadata &SetName(const gd::String &name_) {
+    name = name_;
+    return *this;
+  }
+
+  /**
+   * \brief Return an optional additional information, used for some parameters
+   * with special type (for example, it can contains the type of object accepted
+   * by the parameter).
+   */
+  const gd::String &GetExtraInfo() const { return supplementaryInformation; }
+
+  /**
+   * \brief Set an optional additional information, used for some parameters
+   * with special type (for example, it can contains the type of object accepted
+   * by the parameter).
+   */
+  ValueTypeMetadata &SetExtraInfo(const gd::String &supplementaryInformation_) {
+    supplementaryInformation = supplementaryInformation_;
+    return *this;
+  }
+
+  /**
+   * \brief Return true if the parameter is optional.
+   */
+  bool IsOptional() const { return optional; }
+
+  /**
+   * \brief Set if the parameter is optional.
+   */
+  ValueTypeMetadata &SetOptional(bool optional_ = true) {
+    optional = optional_;
+    return *this;
+  }
+
+  /**
+   * \brief Get the default value for the parameter.
+   */
+  const gd::String &GetDefaultValue() const { return defaultValue; }
+
+  /**
+   * \brief Set the default value, if the parameter is optional.
+   */
+  ValueTypeMetadata &SetDefaultValue(const gd::String &defaultValue_) {
+    defaultValue = defaultValue_;
+    return *this;
+  }
+
+  /**
+   * \brief Return true if the type is defined.
+   */
+  bool IsDefined() const {
+    return !name.empty();
+  }
+
+  /**
+   * \brief Return true if the type is representing one object
+   * (or more, i.e: an object group).
+   */
+  bool IsObject() const {
+    return gd::ValueTypeMetadata::IsTypeObject(name);
+  }
+
+  /**
+   * \brief Return true if the type is "behavior".
+   */
+  bool IsBehavior() const {
+    return gd::ValueTypeMetadata::IsTypeBehavior(name);
+  }
+
+  /**
+   * \brief Return true if the type is an expression of the
+   * given type.
+   */
+  bool IsNumber() const {
+    return gd::ValueTypeMetadata::IsTypeExpression("number", name);
+  }
+
+  /**
+   * \brief Return true if the type is a string.
+   */
+  bool IsString() const {
+    return gd::ValueTypeMetadata::IsTypeExpression("string", name);
+  }
+
+  /**
+   * \brief Return true if the type of the parameter is a number.
+   * \note If you had a new type of parameter, also add it in the IDE (
+   * see EventsFunctionParametersEditor, ParameterRenderingService
+   * and ExpressionAutocompletion) and in the EventsCodeGenerator.
+   */
+  bool IsVariable() const {
+    return gd::ValueTypeMetadata::IsTypeExpression("variable", name);
+  }
+
+  /**
+   * \brief Return true if the type is representing one object
+   * (or more, i.e: an object group).
+   */
+  static bool IsTypeObject(const gd::String &parameterType) {
+    return parameterType == "object" || parameterType == "objectPtr" ||
+           parameterType == "objectList" ||
+           parameterType == "objectListOrEmptyIfJustDeclared" ||
+           parameterType == "objectListOrEmptyWithoutPicking";
+  }
+
+  /**
+   * \brief Return true if the type is "behavior".
+   */
+  static bool IsTypeBehavior(const gd::String &parameterType) {
+    return parameterType == "behavior";
+  }
+
+  /**
+   * \brief Return true if the type is an expression of the given type.
+   * \note If you are adding a new type of parameter, also add it in the IDE (
+   * see EventsFunctionParametersEditor, ParameterRenderingService
+   * and ExpressionAutocompletion) and in the EventsCodeGenerator.
+   */
+  static bool IsTypeExpression(const gd::String &type,
+                           const gd::String &parameterType) {
+    if (type == "number") {
+      return parameterType == "number" || parameterType == "expression" ||
+             parameterType == "camera" || parameterType == "forceMultiplier";
+    } else if (type == "string") {
+      return parameterType == "string" || parameterType == "layer" ||
+             parameterType == "color" || parameterType == "file" ||
+             parameterType == "joyaxis" ||
+             parameterType == "stringWithSelector" ||
+             parameterType == "sceneName" ||
+             parameterType == "layerEffectName" ||
+             parameterType == "layerEffectParameterName" ||
+             parameterType == "objectEffectName" ||
+             parameterType == "objectEffectParameterName" ||
+             parameterType == "objectPointName" ||
+             parameterType == "objectAnimationName" ||
+             parameterType == "functionParameterName" ||
+             parameterType == "externalLayoutName" ||
+             parameterType == "leaderboardId" ||
+             parameterType == "identifier";
+    } else if (type == "variable") {
+      return parameterType == "objectvar" || parameterType == "globalvar" ||
+             parameterType == "scenevar";
+    }
+    return false;
+  }
+
+  /**
+   * \brief Return the expression type from the parameter type.
+   * Declinations of "number" and "string" types (like "forceMultiplier" or
+   * "sceneName") are replaced by "number" and "string".
+   */
+  static const gd::String &GetPrimitiveValueType(const gd::String &parameterType);
+  static const gd::String numberType;
+  static const gd::String stringType;
+
+  /** \name Serialization
+   */
+  ///@{
+  /**
+   * \brief Serialize the ParameterMetadata to the specified element
+   */
+  void SerializeTo(gd::SerializerElement &element) const;
+
+  /**
+   * \brief Load the ParameterMetadata from the specified element
+   */
+  void UnserializeFrom(const gd::SerializerElement &element);
+  ///@}
+
+ private:
+  gd::String name;                      ///< Parameter type
+  gd::String supplementaryInformation;  ///< Used if needed
+  bool optional;                        ///< True if the parameter is optional
+  gd::String defaultValue;     ///< Used as a default value in editor or if an
+                               ///< optional parameter is empty.
+};
+
+}  // namespace gd
+
+#endif  // VALUE_TYPE_METADATA_H

Core/GDCore/Extensions/Platform.cpp

@@ -7,7 +7,9 @@
 
 #include "GDCore/Extensions/PlatformExtension.h"
 #include "GDCore/Project/Object.h"
+#include "GDCore/Project/ObjectConfiguration.h"
 #include "GDCore/String.h"
+#include "GDCore/Tools/Log.h"
 
 using namespace std;
 
@@ -91,24 +93,22 @@ std::shared_ptr<gd::PlatformExtension> Platform::GetExtension(
   return std::shared_ptr<gd::PlatformExtension>();
 }
 
-std::unique_ptr<gd::Object> Platform::CreateObject(
-    gd::String type, const gd::String& name) const {
+std::unique_ptr<gd::ObjectConfiguration> Platform::CreateObjectConfiguration(
+    gd::String type) const {
   if (creationFunctionTable.find(type) == creationFunctionTable.end()) {
-    std::cout << "Tried to create an object with an unknown type: " << type
-              << " for platform " << GetName() << "!" << std::endl;
+    gd::LogWarning("Tried to create an object with an unknown type: " + type
+              + " for platform " + GetName() + "!");
     type = "";
     if (creationFunctionTable.find("") == creationFunctionTable.end()) {
-      std::cout << "Unable to create a Base object!" << std::endl;
+      gd::LogError("Unable to create a Base object!");
       return nullptr;
     }
   }
 
   // Create a new object with the type we want.
-  std::unique_ptr<gd::Object> object =
-      (creationFunctionTable.find(type)->second)(name);
-  object->SetType(type);
-
-  return std::unique_ptr<gd::Object>(std::move(object));
+  auto objectConfiguration = (creationFunctionTable.find(type)->second)();
+  objectConfiguration->SetType(type);
+  return objectConfiguration;
 }
 
 #if defined(GD_IDE_ONLY)

Core/GDCore/Extensions/Platform.h

@@ -16,6 +16,7 @@ namespace gd {
 class InstructionsMetadataHolder;
 class Project;
 class Object;
+class ObjectConfiguration;
 class Behavior;
 class BehaviorMetadata;
 class ObjectMetadata;
@@ -26,7 +27,7 @@ class LayoutEditorCanvas;
 class ProjectExporter;
 }  // namespace gd
 
-typedef std::function<std::unique_ptr<gd::Object>(gd::String name)>
+typedef std::function<std::unique_ptr<gd::ObjectConfiguration>()>
     CreateFunPtr;
 
 #undef CreateEvent
@@ -146,8 +147,8 @@ class GD_CORE_API Platform {
   /**
    * \brief Create an object of given type with the specified name.
    */
-  std::unique_ptr<gd::Object> CreateObject(gd::String type,
-                                           const gd::String& name) const;
+  std::unique_ptr<gd::ObjectConfiguration> CreateObjectConfiguration(
+      gd::String type) const;
 
   /**
    * \brief Create an event of given type

Core/GDCore/Extensions/PlatformExtension.cpp

@@ -18,6 +18,7 @@
 #include "GDCore/Extensions/Platform.h"
 #include "GDCore/IDE/PlatformManager.h"
 #include "GDCore/Project/Behavior.h"
+#include "GDCore/Project/ObjectConfiguration.h"
 #include "GDCore/Project/BehaviorsSharedData.h"
 #include "GDCore/Tools/Localization.h"
 
@@ -231,7 +232,7 @@ gd::ObjectMetadata& PlatformExtension::AddObject(
     const gd::String& fullname,
     const gd::String& description,
     const gd::String& icon24x24,
-    std::shared_ptr<gd::Object> instance) {
+    std::shared_ptr<gd::ObjectConfiguration> instance) {
   gd::String nameWithNamespace = GetNameSpace() + name;
   objectsInfos[nameWithNamespace] = ObjectMetadata(GetNameSpace(),
                                                    nameWithNamespace,
@@ -244,6 +245,21 @@ gd::ObjectMetadata& PlatformExtension::AddObject(
   return objectsInfos[nameWithNamespace];
 }
 
+gd::ObjectMetadata& PlatformExtension::AddEventsBasedObject(
+    const gd::String& name,
+    const gd::String& fullname,
+    const gd::String& description,
+    const gd::String& icon24x24) {
+  gd::String nameWithNamespace = GetNameSpace() + name;
+  objectsInfos[nameWithNamespace] = ObjectMetadata(GetNameSpace(),
+                                                   nameWithNamespace,
+                                                   fullname,
+                                                   description,
+                                                   icon24x24)
+                                        .SetHelpPath(GetHelpPath());
+  return objectsInfos[nameWithNamespace];
+}
+
 gd::BehaviorMetadata& PlatformExtension::AddBehavior(
     const gd::String& name,
     const gd::String& fullname,
@@ -269,6 +285,25 @@ gd::BehaviorMetadata& PlatformExtension::AddBehavior(
   return behaviorsInfo[nameWithNamespace];
 }
 
+gd::BehaviorMetadata& PlatformExtension::AddEventsBasedBehavior(
+    const gd::String& name,
+    const gd::String& fullname,
+    const gd::String& description,
+    const gd::String& group,
+    const gd::String& icon24x24) {
+  gd::String nameWithNamespace = GetNameSpace() + name;
+  behaviorsInfo[nameWithNamespace] = BehaviorMetadata(GetNameSpace(),
+                                                      nameWithNamespace,
+                                                      fullname,
+                                                      // Default name is the name
+                                                      name,
+                                                      description,
+                                                      group,
+                                                      icon24x24)
+                                         .SetHelpPath(GetHelpPath());
+  return behaviorsInfo[nameWithNamespace];
+}
+
 gd::EffectMetadata& PlatformExtension::AddEffect(const gd::String& name) {
   gd::String nameWithNamespace = GetNameSpace() + name;
   effectsMetadata[nameWithNamespace] = EffectMetadata(nameWithNamespace);

Core/GDCore/Extensions/PlatformExtension.h

@@ -37,9 +37,10 @@ class ArbitraryResourceWorker;
 class BehaviorsSharedData;
 class Behavior;
 class Object;
+class ObjectConfiguration;
 }  // namespace gd
 
-typedef std::function<std::unique_ptr<gd::Object>(gd::String name)>
+typedef std::function<std::unique_ptr<gd::ObjectConfiguration>()>
     CreateFunPtr;
 
 namespace gd {
@@ -242,7 +243,21 @@ class GD_CORE_API PlatformExtension {
                                 const gd::String& fullname_,
                                 const gd::String& description_,
                                 const gd::String& icon_,
-                                std::shared_ptr<gd::Object> instance);
+                                std::shared_ptr<gd::ObjectConfiguration> instance);
+
+  /**
+   * \brief Declare a new events based object as being part of the extension.
+   *
+   * \param name The name of the object
+   * \param fullname The user friendly name of the object
+   * \param description The user friendly description of the object
+   * \param icon The icon of the object.
+   */
+  gd::ObjectMetadata& AddEventsBasedObject(
+      const gd::String& name_,
+      const gd::String& fullname_,
+      const gd::String& description_,
+      const gd::String& icon_);
 
   /**
    * \brief Declare a new behavior as being part of the extension.
@@ -267,6 +282,21 @@ class GD_CORE_API PlatformExtension {
       std::shared_ptr<gd::Behavior> instance,
       std::shared_ptr<gd::BehaviorsSharedData> sharedDatasInstance);
 
+  /**
+   * \brief Declare a new events based behavior as being part of the extension.
+   *
+   * \param name The name of the behavior
+   * \param fullname The user friendly name of the behavior
+   * \param description The user friendly description of the behavior
+   * \param icon The icon of the behavior.
+   */
+  gd::BehaviorMetadata& AddEventsBasedBehavior(
+      const gd::String& name_,
+      const gd::String& fullname_,
+      const gd::String& description_,
+      const gd::String& group_,
+      const gd::String& icon_);
+
   /**
    * \brief Declare a new effect as being part of the extension.
    * \param name The internal name of the effect (also called effect type).

Core/GDCore/Extensions/PlatformExtension.inl

@@ -25,8 +25,8 @@ gd::ObjectMetadata& PlatformExtension::AddObject(const gd::String& name,
                      fullname,
                      description,
                      icon24x24,
-                     [](gd::String name) -> std::unique_ptr<gd::Object> {
-                       return gd::make_unique<T>(name);
+                     []() -> std::unique_ptr<gd::ObjectConfiguration> {
+                       return gd::make_unique<T>();
                      })
           .SetHelpPath(GetHelpPath());
 

Core/GDCore/IDE/Events/ArbitraryEventsWorker.cpp

@@ -73,4 +73,54 @@ bool ArbitraryEventsWorker::VisitInstruction(gd::Instruction& instruction,
 
 ArbitraryEventsWorkerWithContext::~ArbitraryEventsWorkerWithContext() {}
 
+
+ReadOnlyArbitraryEventsWorker::~ReadOnlyArbitraryEventsWorker() {}
+
+void ReadOnlyArbitraryEventsWorker::VisitEventList(const gd::EventsList& events) {
+  DoVisitEventList(events);
+
+  for (std::size_t i = 0; i < events.size(); ++i) {
+    VisitEvent(events[i]);
+
+    if (events[i].CanHaveSubEvents()) {
+      VisitEventList(events[i].GetSubEvents());
+    }
+  }
+}
+
+void ReadOnlyArbitraryEventsWorker::VisitEvent(const gd::BaseEvent& event) {
+  DoVisitEvent(event);
+
+  const vector<const gd::InstructionsList*> conditionsVectors =
+      event.GetAllConditionsVectors();
+  for (std::size_t j = 0; j < conditionsVectors.size(); ++j) {
+    VisitInstructionList(*conditionsVectors[j], true);
+  }
+
+  const vector<const gd::InstructionsList*> actionsVectors = event.GetAllActionsVectors();
+  for (std::size_t j = 0; j < actionsVectors.size(); ++j) {
+    VisitInstructionList(*actionsVectors[j], false);
+  }
+}
+
+void ReadOnlyArbitraryEventsWorker::VisitInstructionList(
+    const gd::InstructionsList& instructions, bool areConditions) {
+  DoVisitInstructionList(instructions, areConditions);
+
+  for (std::size_t i = 0; i < instructions.size(); ++i) {
+    VisitInstruction(instructions[i], areConditions);
+    if (!instructions[i].GetSubInstructions().empty()) {
+      VisitInstructionList(instructions[i].GetSubInstructions(),
+                            areConditions);
+    }
+  }
+}
+
+void ReadOnlyArbitraryEventsWorker::VisitInstruction(const gd::Instruction& instruction,
+                                             bool isCondition) {
+  DoVisitInstruction(instruction, isCondition);
+}
+
+ReadOnlyArbitraryEventsWorkerWithContext::~ReadOnlyArbitraryEventsWorkerWithContext() {}
+
 }  // namespace gd

Core/GDCore/IDE/Events/ArbitraryEventsWorker.h

@@ -121,6 +121,101 @@ class GD_CORE_API ArbitraryEventsWorkerWithContext
   const gd::ObjectsContainer* currentObjectsContainer;
 };
 
+/**
+ * \brief ReadOnlyArbitraryEventsWorker is an abstract class used to browse events (and
+ * instructions). It can be used to implement autocompletion for example.
+ *
+ * \see gd::ReadOnlyArbitraryEventsWorkerWithContext
+ *
+ * \ingroup IDE
+ */
+class GD_CORE_API ReadOnlyArbitraryEventsWorker {
+ public:
+  ReadOnlyArbitraryEventsWorker(){};
+  virtual ~ReadOnlyArbitraryEventsWorker();
+
+  /**
+   * \brief Launch the worker on the specified events list.
+   */
+  void Launch(const gd::EventsList& events) { VisitEventList(events); };
+
+ private:
+  void VisitEventList(const gd::EventsList& events);
+  void VisitEvent(const gd::BaseEvent& event);
+  void VisitInstructionList(const gd::InstructionsList& instructions,
+                            bool areConditions);
+  void VisitInstruction(const gd::Instruction& instruction, bool isCondition);
+
+  /**
+   * Called to do some work on an event list.
+   */
+  virtual void DoVisitEventList(const gd::EventsList& events){};
+
+  /**
+   * Called to do some work on an event
+   */
+  virtual void DoVisitEvent(const gd::BaseEvent& event) {};
+
+  /**
+   * Called to do some work on an instruction list
+   */
+  virtual void DoVisitInstructionList(const gd::InstructionsList& instructions,
+                                      bool areConditions){};
+
+  /**
+   * Called to do some work on an instruction.
+   */
+  virtual void DoVisitInstruction(const gd::Instruction& instruction,
+                                  bool isCondition) {};
+};
+
+/**
+ * \brief An events worker that will know about the context (the objects
+ * container). Useful for workers working on expressions notably.
+ *
+ * \see gd::ReadOnlyArbitraryEventsWorker
+ *
+ * \ingroup IDE
+ */
+class GD_CORE_API ReadOnlyArbitraryEventsWorkerWithContext
+    : public ReadOnlyArbitraryEventsWorker {
+ public:
+  ReadOnlyArbitraryEventsWorkerWithContext()
+      : currentGlobalObjectsContainer(nullptr),
+        currentObjectsContainer(nullptr){};
+  virtual ~ReadOnlyArbitraryEventsWorkerWithContext();
+
+  /**
+   * \brief Launch the worker on the specified events list,
+   * giving the objects container on which the events are applying to.
+   */
+  void Launch(const gd::EventsList& events,
+              const gd::ObjectsContainer& globalObjectsContainer_,
+              const gd::ObjectsContainer& objectsContainer_) {
+    currentGlobalObjectsContainer = &globalObjectsContainer_;
+    currentObjectsContainer = &objectsContainer_;
+    ReadOnlyArbitraryEventsWorker::Launch(events);
+  };
+
+  void Launch(gd::EventsList& events) = delete;
+
+ protected:
+  const gd::ObjectsContainer& GetGlobalObjectsContainer() {
+    // Pointers are guaranteed to be not nullptr after
+    // Launch was called.
+    return *currentGlobalObjectsContainer;
+  };
+  const gd::ObjectsContainer& GetObjectsContainer() {
+    // Pointers are guaranteed to be not nullptr after
+    // Launch was called.
+    return *currentObjectsContainer;
+  };
+
+ private:
+  const gd::ObjectsContainer* currentGlobalObjectsContainer;
+  const gd::ObjectsContainer* currentObjectsContainer;
+};
+
 }  // namespace gd
 
 #endif  // GDCORE_ARBITRARYEVENTSWORKER_H

Core/GDCore/IDE/Events/BehaviorTypeRenamer.cpp

@@ -0,0 +1,25 @@
+#include "BehaviorTypeRenamer.h"
+
+#include "GDCore/Events/Instruction.h"
+#include "GDCore/Extensions/Metadata/MetadataProvider.h"
+#include "GDCore/Extensions/PlatformExtension.h"
+#include "GDCore/IDE/WholeProjectRefactorer.h"
+#include "GDCore/IDE/Events/ExpressionTypeFinder.h"
+#include "GDCore/Project/Behavior.h"
+#include "GDCore/Project/Object.h"
+#include "GDCore/Project/Project.h"
+
+namespace gd {
+
+void BehaviorTypeRenamer::DoVisitObject(gd::Object& object) {
+};
+
+void BehaviorTypeRenamer::DoVisitBehavior(gd::Behavior& behavior) {
+  if (behavior.GetTypeName() == oldType) {
+    behavior.SetTypeName(newType);
+  }
+};
+
+BehaviorTypeRenamer::~BehaviorTypeRenamer() {}
+
+}  // namespace gd

Core/GDCore/IDE/Events/BehaviorTypeRenamer.h

@@ -0,0 +1,43 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+
+#ifndef GDCORE_BEHAVIORTYPERENAMER_H
+#define GDCORE_BEHAVIORTYPERENAMER_H
+#include <set>
+
+#include "GDCore/Events/Parsers/ExpressionParser2NodeWorker.h"
+#include "GDCore/IDE/Events/ArbitraryEventsWorker.h"
+#include "GDCore/IDE/Project/ArbitraryObjectsWorker.h"
+#include "GDCore/String.h"
+
+namespace gd {
+class Project;
+class Object;
+class Behavior;
+}  // namespace gd
+
+namespace gd {
+
+class GD_CORE_API BehaviorTypeRenamer : public ArbitraryObjectsWorker {
+ public:
+  BehaviorTypeRenamer(const gd::Project& project_,
+                          const gd::String& oldType_,
+                          const gd::String& newType_)
+      : project(project_), oldType(oldType_), newType(newType_){};
+  virtual ~BehaviorTypeRenamer();
+
+ private:
+  void DoVisitObject(gd::Object& object) override;
+  void DoVisitBehavior(gd::Behavior& behavior) override;
+
+  const gd::Project& project;
+  gd::String oldType;
+  gd::String newType;
+};
+
+};  // namespace gd
+
+#endif // GDCORE_BEHAVIORTYPERENAMER_H

Core/GDCore/IDE/Events/CustomObjectTypeRenamer.cpp

@@ -0,0 +1,24 @@
+#include "CustomObjectTypeRenamer.h"
+
+#include "GDCore/Events/Instruction.h"
+#include "GDCore/Extensions/Metadata/MetadataProvider.h"
+#include "GDCore/Extensions/PlatformExtension.h"
+#include "GDCore/IDE/WholeProjectRefactorer.h"
+#include "GDCore/IDE/Events/ExpressionTypeFinder.h"
+#include "GDCore/Project/Behavior.h"
+#include "GDCore/Project/Object.h"
+#include "GDCore/Project/Project.h"
+
+namespace gd {
+
+void CustomObjectTypeRenamer::DoVisitObject(gd::Object& object) {
+  if (object.GetType() == oldType) {
+    object.SetType(newType);
+  }
+};
+
+void CustomObjectTypeRenamer::DoVisitBehavior(gd::Behavior& behavior) {};
+
+CustomObjectTypeRenamer::~CustomObjectTypeRenamer() {}
+
+}  // namespace gd

Core/GDCore/IDE/Events/CustomObjectTypeRenamer.h

@@ -0,0 +1,43 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+
+#ifndef GDCORE_CUSTOMOBJECTTYPERENAMER_H
+#define GDCORE_CUSTOMOBJECTTYPERENAMER_H
+#include <set>
+
+#include "GDCore/Events/Parsers/ExpressionParser2NodeWorker.h"
+#include "GDCore/IDE/Events/ArbitraryEventsWorker.h"
+#include "GDCore/IDE/Project/ArbitraryObjectsWorker.h"
+#include "GDCore/String.h"
+
+namespace gd {
+class Project;
+class Object;
+class Behavior;
+}  // namespace gd
+
+namespace gd {
+
+class GD_CORE_API CustomObjectTypeRenamer : public ArbitraryObjectsWorker {
+ public:
+  CustomObjectTypeRenamer(const gd::Project& project_,
+                          const gd::String& oldType_,
+                          const gd::String& newType_)
+      : project(project_), oldType(oldType_), newType(newType_){};
+  virtual ~CustomObjectTypeRenamer();
+
+ private:
+  void DoVisitObject(gd::Object& object) override;
+  void DoVisitBehavior(gd::Behavior& behavior) override;
+
+  const gd::Project& project;
+  gd::String oldType;
+  gd::String newType;
+};
+
+};  // namespace gd
+
+#endif // GDCORE_CUSTOMOBJECTTYPERENAMER_H

Core/GDCore/IDE/Events/EventsBehaviorRenamer.cpp

@@ -120,7 +120,7 @@ bool EventsBehaviorRenamer::DoVisitInstruction(gd::Instruction& instruction,
           const gd::Expression& parameterValue,
           size_t parameterIndex,
           const gd::String& lastObjectName) {
-        const gd::String& type = parameterMetadata.type;
+        const gd::String& type = parameterMetadata.GetType();
 
         if (gd::ParameterMetadata::IsBehavior(type)) {
           if (lastObjectName == objectName) {

Core/GDCore/IDE/Events/EventsIdentifiersFinder.cpp

@@ -0,0 +1,254 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+
+#include "EventsIdentifiersFinder.h"
+#include "GDCore/Events/Event.h"
+#include "GDCore/Events/Instruction.h"
+#include "GDCore/Events/Parsers/ExpressionParser2NodePrinter.h"
+#include "GDCore/Events/Parsers/ExpressionParser2NodeWorker.h"
+#include "GDCore/Extensions/Metadata/ExpressionMetadata.h"
+#include "GDCore/Extensions/Metadata/InstructionMetadata.h"
+#include "GDCore/Extensions/Metadata/MetadataProvider.h"
+#include "GDCore/Extensions/Platform.h"
+#include "GDCore/IDE/Events/ArbitraryEventsWorker.h"
+#include "GDCore/Project/Layout.h"
+#include "GDCore/Project/Object.h"
+#include "GDCore/Project/Project.h"
+#include "GDCore/Project/ExternalEvents.h"
+#include "GDCore/IDE/DependenciesAnalyzer.h"
+
+using namespace std;
+
+namespace gd {
+namespace {
+/**
+ * \brief Go through the nodes to search for identifier occurrences.
+ *
+ * \see gd::ExpressionParser2
+ */
+class GD_CORE_API IdentifierFinderExpressionNodeWorker
+    : public ExpressionParser2NodeWorker {
+ public:
+  IdentifierFinderExpressionNodeWorker(std::set<gd::String>& results_,
+                              const gd::Platform &platform_,
+                              const gd::ObjectsContainer &globalObjectsContainer_,
+                              const gd::ObjectsContainer &objectsContainer_,
+                              const gd::String& identifierType_,
+                              const gd::String& objectName_ = "")
+      : results(results_),
+        platform(platform_),
+        globalObjectsContainer(globalObjectsContainer_),
+        objectsContainer(objectsContainer_),
+        identifierType(identifierType_),
+        objectName(objectName_){};
+  virtual ~IdentifierFinderExpressionNodeWorker(){};
+
+ protected:
+  void OnVisitSubExpressionNode(SubExpressionNode& node) override {
+    node.expression->Visit(*this);
+  }
+  void OnVisitOperatorNode(OperatorNode& node) override {
+    node.leftHandSide->Visit(*this);
+    node.rightHandSide->Visit(*this);
+  }
+  void OnVisitUnaryOperatorNode(UnaryOperatorNode& node) override {
+    node.factor->Visit(*this);
+  }
+  void OnVisitNumberNode(NumberNode& node) override {}
+  void OnVisitTextNode(TextNode& node) override {}
+  void OnVisitVariableNode(VariableNode& node) override {
+    if (node.child) node.child->Visit(*this);
+  }
+  void OnVisitVariableAccessorNode(VariableAccessorNode& node) override {
+    if (node.child) node.child->Visit(*this);
+  }
+  void OnVisitVariableBracketAccessorNode(
+      VariableBracketAccessorNode& node) override {
+    node.expression->Visit(*this);
+    if (node.child) node.child->Visit(*this);
+  }
+  void OnVisitIdentifierNode(IdentifierNode& node) override {}
+  void OnVisitObjectFunctionNameNode(ObjectFunctionNameNode& node) override {}
+  void OnVisitFunctionCallNode(FunctionCallNode& node) override {
+    bool considerFunction = objectName.empty() || node.objectName == objectName;
+
+    const bool isObjectFunction = !node.objectName.empty();
+    const gd::ExpressionMetadata &metadata = isObjectFunction ?
+            MetadataProvider::GetObjectAnyExpressionMetadata(
+                platform,
+                GetTypeOfObject(globalObjectsContainer, objectsContainer, objectName),
+                node.functionName):
+          MetadataProvider::GetAnyExpressionMetadata(platform, node.functionName);
+
+    if (gd::MetadataProvider::IsBadExpressionMetadata(metadata)) {
+      return;
+    }
+    
+    size_t parameterIndex = 0;
+    for (size_t metadataIndex = (isObjectFunction ? 1 : 0); metadataIndex < metadata.parameters.size()
+      && parameterIndex < node.parameters.size(); ++metadataIndex) {
+      auto& parameterMetadata = metadata.parameters[metadataIndex];
+      if (parameterMetadata.IsCodeOnly()) {
+        continue;
+      }
+      auto& parameterNode = node.parameters[parameterIndex];
+      ++parameterIndex;
+
+      if (considerFunction && parameterMetadata.GetType() == "identifier"
+       && parameterMetadata.GetExtraInfo() == identifierType) {
+        // Store the value of the parameter
+        results.insert(
+            gd::ExpressionParser2NodePrinter::PrintNode(*parameterNode));
+      } else {
+        parameterNode->Visit(*this);
+      }
+    }
+  }
+  void OnVisitEmptyNode(EmptyNode& node) override {}
+
+ private:
+  const gd::Platform &platform;
+  const gd::ObjectsContainer &globalObjectsContainer;
+  const gd::ObjectsContainer &objectsContainer;
+
+  std::set<gd::String>& results;  ///< Reference to the std::set where argument
+                                  ///< values must be stored.
+  gd::String identifierType;  ///< The type of the parameters to be searched for.
+  gd::String objectName;     ///< If not empty, parameters will be taken into
+                             ///< account only if related to this object.
+};
+
+/**
+ * \brief Go through the events to search for identifier occurrences.
+ */
+class GD_CORE_API IdentifierFinderEventWorker
+    : public ReadOnlyArbitraryEventsWorkerWithContext {
+ public:
+  IdentifierFinderEventWorker(std::set<gd::String>& results_,
+                              const gd::Platform &platform_,
+                              const gd::String& identifierType_,
+                              const gd::String& objectName_ = "")
+      : results(results_),
+        platform(platform_),
+        identifierType(identifierType_),
+        objectName(objectName_){};
+  virtual ~IdentifierFinderEventWorker(){};
+
+  void DoVisitInstructionList(const gd::InstructionsList& instructions,
+                                      bool areConditions) override {
+    for (std::size_t aId = 0; aId < instructions.size(); ++aId) {
+      auto& instruction = instructions[aId];
+      gd::String lastObjectParameter = "";
+      const gd::InstructionMetadata& instrInfos =
+          areConditions ? MetadataProvider::GetConditionMetadata(
+                              platform, instruction.GetType())
+                        : MetadataProvider::GetActionMetadata(
+                              platform, instruction.GetType());
+      for (std::size_t pNb = 0; pNb < instrInfos.parameters.size(); ++pNb) {
+        // The parameter has the searched type...
+      if (instrInfos.parameters[pNb].GetType() == "identifier"
+       && instrInfos.parameters[pNb].GetExtraInfo() == identifierType) {
+          //...remember the value of the parameter.
+          if (objectName.empty() || lastObjectParameter == objectName) {
+            results.insert(instruction.GetParameter(pNb).GetPlainString());
+          }
+        }
+        // Search in expressions
+        else if (ParameterMetadata::IsExpression(
+                    "number", instrInfos.parameters[pNb].GetType()) ||
+                ParameterMetadata::IsExpression(
+                    "string", instrInfos.parameters[pNb].GetType())) {
+          auto node = instruction.GetParameter(pNb).GetRootNode();
+
+          IdentifierFinderExpressionNodeWorker searcher(
+              results,
+              platform,
+              GetGlobalObjectsContainer(),
+              GetObjectsContainer(),
+              identifierType,
+              objectName);
+          node->Visit(searcher);
+        }
+        // Remember the value of the last "object" parameter.
+        else if (gd::ParameterMetadata::IsObject(
+                    instrInfos.parameters[pNb].GetType())) {
+          lastObjectParameter =
+              instruction.GetParameter(pNb).GetPlainString();
+        }
+      }
+    }
+  };
+
+ private:
+  const gd::Platform &platform;
+
+  std::set<gd::String>& results;  ///< Reference to the std::set where argument
+                                  ///< values must be stored.
+  gd::String identifierType;  ///< The type of the parameters to be searched for.
+  gd::String objectName;     ///< If not empty, parameters will be taken into
+                             ///< account only if related to this object.
+};
+} // namespace
+
+std::set<gd::String> EventsIdentifiersFinder::FindAllIdentifierExpressions(
+    const gd::Platform& platform,
+    const gd::Project& project,
+    const gd::Layout& layout,
+    const gd::String& identifierType,
+    const gd::String& contextObjectName) {
+  std::set<gd::String> results;
+
+  const bool isObjectIdentifier = identifierType.find("object") == 0;
+  // The object from the context is only relevent for object identifiers.
+  auto& actualObjectName = isObjectIdentifier ? contextObjectName : "";
+
+  FindArgumentsInEventsAndDependencies(
+      results,
+      platform,
+      project,
+      layout,
+      identifierType,
+      actualObjectName);
+
+  return results;
+}
+
+void EventsIdentifiersFinder::FindArgumentsInEventsAndDependencies(
+    std::set<gd::String>& results,
+    const gd::Platform& platform,
+    const gd::Project& project,
+    const gd::Layout& layout,
+    const gd::String& identifierType,
+    const gd::String& objectName) {
+  IdentifierFinderEventWorker eventWorker(results,
+                                        platform,
+                                        identifierType,
+                                        objectName);
+  eventWorker.Launch(layout.GetEvents(), project, layout);
+
+  DependenciesAnalyzer dependenciesAnalyzer = DependenciesAnalyzer(project, layout);
+  dependenciesAnalyzer.Analyze();
+  for (const gd::String& externalEventName : dependenciesAnalyzer.GetExternalEventsDependencies()) {
+    const gd::ExternalEvents& externalEvents = project.GetExternalEvents(externalEventName);
+
+    IdentifierFinderEventWorker eventWorker(results,
+                                          platform,
+                                          identifierType,
+                                          objectName);
+    eventWorker.Launch(externalEvents.GetEvents(), project, layout);
+  }
+  for (const gd::String& sceneName : dependenciesAnalyzer.GetScenesDependencies()) {
+    const gd::Layout& dependencyLayout = project.GetLayout(sceneName);
+
+    IdentifierFinderEventWorker eventWorker(results,
+                                          platform,
+                                          identifierType,
+                                          objectName);
+    eventWorker.Launch(dependencyLayout.GetEvents(), project, dependencyLayout);
+  }
+}
+
+}  // namespace gd

Core/GDCore/IDE/Events/EventsIdentifiersFinder.h

@@ -0,0 +1,81 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#ifndef EVENTSIDENTIFIERSFINDER_H
+#define EVENTSIDENTIFIERSFINDER_H
+#include <set>
+#include <vector>
+#include "GDCore/Events/Event.h"
+#include "GDCore/String.h"
+namespace gd {
+class Instruction;
+class Platform;
+class Object;
+class Project;
+class Layout;
+}  // namespace gd
+
+namespace gd {
+
+/**
+ * \brief Perform a search over a layout, searching for layout or object custom
+ * identifiers.
+ *
+ * \todo Refactor this class using ArbitraryEventsWorker
+ *
+ * \ingroup IDE
+ */
+class EventsIdentifiersFinder {
+ public:
+  EventsIdentifiersFinder(){};
+  virtual ~EventsIdentifiersFinder(){};
+
+  /**
+   * Construct a list containing all the expressions for a given identifier used
+   * in the layout.
+   *
+   * \param project The project to use.
+   * \param layout The layout to use.
+   * \param  identifierType The identifier type to be analyzed.
+   * \param  objectName If not empty, parameters will be taken into account
+   * only if the last object parameter is filled with
+   * this value.
+   * \return A std::set containing the names of all identifiers used.
+   */
+  static std::set<gd::String> FindAllIdentifierExpressions(
+      const gd::Platform& platform,
+      const gd::Project& project,
+      const gd::Layout& layout,
+      const gd::String& identifierType,
+      const gd::String& objectName = "");
+
+ private:
+  /**
+   * Construct a list containing all the expressions for a given identifier used
+   * in the layout. It searches in events dependencies.
+   *
+   * \param results A std::set to fill with the expressions used for all parameters of the
+   * specified identifier type
+   * \param platform The platform of the project
+   * \param project The project to use.
+   * \param layout The layout to use.
+   * \param events The events to be analyzed
+   * \param identifierType The identifier type to be analyzed
+   * \param objectName If not empty, parameters will be taken into account
+   * only if the last object parameter is filled with
+   * this value.
+   */
+  static void FindArgumentsInEventsAndDependencies(
+      std::set<gd::String>& results,
+      const gd::Platform& platform,
+      const gd::Project& project,
+      const gd::Layout& layout,
+      const gd::String& identifierType,
+      const gd::String& objectName = "");
+};
+
+}  // namespace gd
+
+#endif  // EVENTSIDENTIFIERSFINDER_H

Core/GDCore/IDE/Events/EventsLeaderboardsLister.cpp

@@ -30,7 +30,7 @@ bool EventsLeaderboardsLister::DoVisitInstruction(gd::Instruction& instruction,
   for (int i = 0; i < instruction.GetParametersCount() &&
                   i < instrInfo.GetParametersCount();
        ++i)
-    if (instrInfo.GetParameter(i).type == "leaderboardId") {
+    if (instrInfo.GetParameter(i).GetType() == "leaderboardId") {
       leaderboardIds.insert(instruction.GetParameter(i).GetPlainString());
     }
   return false;

Core/GDCore/IDE/Events/EventsLeaderboardsRenamer.cpp

@@ -32,7 +32,7 @@ bool EventsLeaderboardsRenamer::DoVisitInstruction(gd::Instruction& instruction,
        ++i) {
     const gd::ParameterMetadata parameter = instrInfo.GetParameter(i);
 
-    if (parameter.type == "leaderboardId") {
+    if (parameter.GetType() == "leaderboardId") {
       const gd::String leaderboardId =
           instruction.GetParameter(i).GetPlainString();
 

Core/GDCore/IDE/Events/EventsRefactorer.cpp

@@ -19,6 +19,7 @@
 #include "GDCore/IDE/Events/ExpressionValidator.h"
 #include "GDCore/IDE/Events/InstructionSentenceFormatter.h"
 #include "GDCore/Project/ObjectsContainer.h"
+#include "GDCore/Project/EventsBasedObject.h"
 #include "GDCore/IDE/Events/ExpressionTypeFinder.h"
 
 using namespace std;
@@ -236,12 +237,12 @@ bool EventsRefactorer::RenameObjectInActions(const gd::Platform& platform,
         MetadataProvider::GetActionMetadata(platform, actions[aId].GetType());
     for (std::size_t pNb = 0; pNb < instrInfos.parameters.size(); ++pNb) {
       // Replace object's name in parameters
-      if (gd::ParameterMetadata::IsObject(instrInfos.parameters[pNb].type) &&
+      if (gd::ParameterMetadata::IsObject(instrInfos.parameters[pNb].GetType()) &&
           actions[aId].GetParameter(pNb).GetPlainString() == oldName)
         actions[aId].SetParameter(pNb, gd::Expression(newName));
       // Replace object's name in expressions
       else if (ParameterMetadata::IsExpression(
-                   "number", instrInfos.parameters[pNb].type)) {
+                   "number", instrInfos.parameters[pNb].GetType())) {
         auto node = actions[aId].GetParameter(pNb).GetRootNode();
 
         if (ExpressionObjectRenamer::Rename(platform, project, layout, "number", *node, oldName, newName)) {
@@ -251,7 +252,7 @@ bool EventsRefactorer::RenameObjectInActions(const gd::Platform& platform,
       }
       // Replace object's name in text expressions
       else if (ParameterMetadata::IsExpression(
-                   "string", instrInfos.parameters[pNb].type)) {
+                   "string", instrInfos.parameters[pNb].GetType())) {
         auto node = actions[aId].GetParameter(pNb).GetRootNode();
 
         if (ExpressionObjectRenamer::Rename(platform, project, layout, "string", *node, oldName, newName)) {
@@ -290,12 +291,12 @@ bool EventsRefactorer::RenameObjectInConditions(
                                                conditions[cId].GetType());
     for (std::size_t pNb = 0; pNb < instrInfos.parameters.size(); ++pNb) {
       // Replace object's name in parameters
-      if (gd::ParameterMetadata::IsObject(instrInfos.parameters[pNb].type) &&
+      if (gd::ParameterMetadata::IsObject(instrInfos.parameters[pNb].GetType()) &&
           conditions[cId].GetParameter(pNb).GetPlainString() == oldName)
         conditions[cId].SetParameter(pNb, gd::Expression(newName));
       // Replace object's name in expressions
       else if (ParameterMetadata::IsExpression(
-                   "number", instrInfos.parameters[pNb].type)) {
+                   "number", instrInfos.parameters[pNb].GetType())) {
         auto node = conditions[cId].GetParameter(pNb).GetRootNode();
 
         if (ExpressionObjectRenamer::Rename(platform, project, layout, "number", *node, oldName, newName)) {
@@ -305,7 +306,7 @@ bool EventsRefactorer::RenameObjectInConditions(
       }
       // Replace object's name in text expressions
       else if (ParameterMetadata::IsExpression(
-                   "string", instrInfos.parameters[pNb].type)) {
+                   "string", instrInfos.parameters[pNb].GetType())) {
         auto node = conditions[cId].GetParameter(pNb).GetRootNode();
 
         if (ExpressionObjectRenamer::Rename(platform, project, layout, "string", *node, oldName, newName)) {
@@ -411,8 +412,8 @@ void EventsRefactorer::RenameObjectInEvents(const gd::Platform& platform,
 }
 
 bool EventsRefactorer::RemoveObjectInActions(const gd::Platform& platform,
-                                             gd::ObjectsContainer& project,
-                                             gd::ObjectsContainer& layout,
+                                             gd::ObjectsContainer& globalObjectsContainer,
+                                             gd::ObjectsContainer& objectsContainer,
                                              gd::InstructionsList& actions,
                                              gd::String name) {
   bool somethingModified = false;
@@ -424,27 +425,27 @@ bool EventsRefactorer::RemoveObjectInActions(const gd::Platform& platform,
         MetadataProvider::GetActionMetadata(platform, actions[aId].GetType());
     for (std::size_t pNb = 0; pNb < instrInfos.parameters.size(); ++pNb) {
       // Find object's name in parameters
-      if (gd::ParameterMetadata::IsObject(instrInfos.parameters[pNb].type) &&
+      if (gd::ParameterMetadata::IsObject(instrInfos.parameters[pNb].GetType()) &&
           actions[aId].GetParameter(pNb).GetPlainString() == name) {
         deleteMe = true;
         break;
       }
       // Find object's name in expressions
       else if (ParameterMetadata::IsExpression(
-                   "number", instrInfos.parameters[pNb].type)) {
+                   "number", instrInfos.parameters[pNb].GetType())) {
         auto node = actions[aId].GetParameter(pNb).GetRootNode();
 
-        if (ExpressionObjectFinder::CheckIfHasObject(platform, project, layout, "number", *node, name)) {
+        if (ExpressionObjectFinder::CheckIfHasObject(platform, globalObjectsContainer, objectsContainer, "number", *node, name)) {
           deleteMe = true;
           break;
         }
       }
       // Find object's name in text expressions
       else if (ParameterMetadata::IsExpression(
-                   "string", instrInfos.parameters[pNb].type)) {
+                   "string", instrInfos.parameters[pNb].GetType())) {
         auto node = actions[aId].GetParameter(pNb).GetRootNode();
 
-        if (ExpressionObjectFinder::CheckIfHasObject(platform, project, layout, "string", *node, name)) {
+        if (ExpressionObjectFinder::CheckIfHasObject(platform, globalObjectsContainer, objectsContainer, "string", *node, name)) {
           deleteMe = true;
           break;
         }
@@ -458,8 +459,8 @@ bool EventsRefactorer::RemoveObjectInActions(const gd::Platform& platform,
     } else if (!actions[aId].GetSubInstructions().empty())
       somethingModified =
           RemoveObjectInActions(platform,
-                                project,
-                                layout,
+                                globalObjectsContainer,
+                                objectsContainer,
                                 actions[aId].GetSubInstructions(),
                                 name) ||
           somethingModified;
@@ -470,8 +471,8 @@ bool EventsRefactorer::RemoveObjectInActions(const gd::Platform& platform,
 
 bool EventsRefactorer::RemoveObjectInConditions(
     const gd::Platform& platform,
-    gd::ObjectsContainer& project,
-    gd::ObjectsContainer& layout,
+    gd::ObjectsContainer& globalObjectsContainer,
+    gd::ObjectsContainer& objectsContainer,
     gd::InstructionsList& conditions,
     gd::String name) {
   bool somethingModified = false;
@@ -484,27 +485,27 @@ bool EventsRefactorer::RemoveObjectInConditions(
                                                conditions[cId].GetType());
     for (std::size_t pNb = 0; pNb < instrInfos.parameters.size(); ++pNb) {
       // Find object's name in parameters
-      if (gd::ParameterMetadata::IsObject(instrInfos.parameters[pNb].type) &&
+      if (gd::ParameterMetadata::IsObject(instrInfos.parameters[pNb].GetType()) &&
           conditions[cId].GetParameter(pNb).GetPlainString() == name) {
         deleteMe = true;
         break;
       }
       // Find object's name in expressions
       else if (ParameterMetadata::IsExpression(
-                   "number", instrInfos.parameters[pNb].type)) {
+                   "number", instrInfos.parameters[pNb].GetType())) {
         auto node = conditions[cId].GetParameter(pNb).GetRootNode();
 
-        if (ExpressionObjectFinder::CheckIfHasObject(platform, project, layout, "number", *node, name)) {
+        if (ExpressionObjectFinder::CheckIfHasObject(platform, globalObjectsContainer, objectsContainer, "number", *node, name)) {
           deleteMe = true;
           break;
         }
       }
       // Find object's name in text expressions
       else if (ParameterMetadata::IsExpression(
-                   "string", instrInfos.parameters[pNb].type)) {
+                   "string", instrInfos.parameters[pNb].GetType())) {
         auto node = conditions[cId].GetParameter(pNb).GetRootNode();
 
-        if (ExpressionObjectFinder::CheckIfHasObject(platform, project, layout, "string", *node, name)) {
+        if (ExpressionObjectFinder::CheckIfHasObject(platform, globalObjectsContainer, objectsContainer, "string", *node, name)) {
           deleteMe = true;
           break;
         }
@@ -518,8 +519,8 @@ bool EventsRefactorer::RemoveObjectInConditions(
     } else if (!conditions[cId].GetSubInstructions().empty())
       somethingModified =
           RemoveObjectInConditions(platform,
-                                   project,
-                                   layout,
+                                   globalObjectsContainer,
+                                   objectsContainer,
                                    conditions[cId].GetSubInstructions(),
                                    name) ||
           somethingModified;
@@ -529,8 +530,8 @@ bool EventsRefactorer::RemoveObjectInConditions(
 }
 
 void EventsRefactorer::RemoveObjectInEvents(const gd::Platform& platform,
-                                            gd::ObjectsContainer& project,
-                                            gd::ObjectsContainer& layout,
+                                            gd::ObjectsContainer& globalObjectsContainer,
+                                            gd::ObjectsContainer& objectsContainer,
                                             gd::EventsList& events,
                                             gd::String name) {
   for (std::size_t i = 0; i < events.size(); ++i) {
@@ -538,19 +539,19 @@ void EventsRefactorer::RemoveObjectInEvents(const gd::Platform& platform,
         events[i].GetAllConditionsVectors();
     for (std::size_t j = 0; j < conditionsVectors.size(); ++j) {
       bool conditionsModified = RemoveObjectInConditions(
-          platform, project, layout, *conditionsVectors[j], name);
+          platform, globalObjectsContainer, objectsContainer, *conditionsVectors[j], name);
     }
 
     vector<gd::InstructionsList*> actionsVectors =
         events[i].GetAllActionsVectors();
     for (std::size_t j = 0; j < actionsVectors.size(); ++j) {
       bool actionsModified = RemoveObjectInActions(
-          platform, project, layout, *actionsVectors[j], name);
+          platform, globalObjectsContainer, objectsContainer, *actionsVectors[j], name);
     }
 
     if (events[i].CanHaveSubEvents())
       RemoveObjectInEvents(
-          platform, project, layout, events[i].GetSubEvents(), name);
+          platform, globalObjectsContainer, objectsContainer, events[i].GetSubEvents(), name);
   }
 }
 

Core/GDCore/IDE/Events/EventsVariablesFinder.cpp

@@ -13,6 +13,7 @@
 #include "GDCore/Extensions/Metadata/InstructionMetadata.h"
 #include "GDCore/Extensions/Metadata/MetadataProvider.h"
 #include "GDCore/Extensions/Platform.h"
+#include "GDCore/IDE/Events/ArbitraryEventsWorker.h"
 #include "GDCore/Project/Layout.h"
 #include "GDCore/Project/Object.h"
 #include "GDCore/Project/Project.h"
@@ -22,28 +23,28 @@
 using namespace std;
 
 namespace gd {
-
+namespace {
 /**
- * \brief Go through the nodes and change the given object name to a new one.
+ * \brief Go through the nodes to search for variable occurrences.
  *
  * \see gd::ExpressionParser2
  */
-class GD_CORE_API ExpressionParameterSearcher
+class GD_CORE_API VariableFinderExpressionNodeWorker
     : public ExpressionParser2NodeWorker {
  public:
-  ExpressionParameterSearcher(const gd::Platform &platform_,
+  VariableFinderExpressionNodeWorker(std::set<gd::String>& results_,
+                              const gd::Platform &platform_,
                               const gd::ObjectsContainer &globalObjectsContainer_,
                               const gd::ObjectsContainer &objectsContainer_,
-                              std::set<gd::String>& results_,
                               const gd::String& parameterType_,
                               const gd::String& objectName_ = "")
-      : platform(platform_),
+      : results(results_),
+        platform(platform_),
         globalObjectsContainer(globalObjectsContainer_),
         objectsContainer(objectsContainer_),
-        results(results_),
         parameterType(parameterType_),
         objectName(objectName_){};
-  virtual ~ExpressionParameterSearcher(){};
+  virtual ~VariableFinderExpressionNodeWorker(){};
 
  protected:
   void OnVisitSubExpressionNode(SubExpressionNode& node) override {
@@ -74,27 +75,34 @@ class GD_CORE_API ExpressionParameterSearcher
   void OnVisitFunctionCallNode(FunctionCallNode& node) override {
     bool considerFunction = objectName.empty() || node.objectName == objectName;
 
-    const gd::ExpressionMetadata &metadata = node.objectName.empty() ?
-          MetadataProvider::GetAnyExpressionMetadata(platform, node.functionName) :
+    const bool isObjectFunction = !node.objectName.empty();
+    const gd::ExpressionMetadata &metadata = isObjectFunction ?
             MetadataProvider::GetObjectAnyExpressionMetadata(
                 platform,
                 GetTypeOfObject(globalObjectsContainer, objectsContainer, objectName),
-                node.functionName);
+                node.functionName):
+            MetadataProvider::GetAnyExpressionMetadata(platform, node.functionName);
 
     if (gd::MetadataProvider::IsBadExpressionMetadata(metadata)) {
       return;
     }
-    
-    for (size_t i = 0; i < node.parameters.size() &&
-                       i < metadata.parameters.size();
-         ++i) {
-      auto& parameterMetadata = metadata.parameters[i];
+
+    size_t parameterIndex = 0;
+    for (size_t metadataIndex = (isObjectFunction ? 1 : 0); metadataIndex < metadata.parameters.size()
+      && parameterIndex < node.parameters.size(); ++metadataIndex) {
+      auto& parameterMetadata = metadata.parameters[metadataIndex];
+      if (parameterMetadata.IsCodeOnly()) {
+        continue;
+      }
+      auto& parameterNode = node.parameters[parameterIndex];
+      ++parameterIndex;
+
       if (considerFunction && parameterMetadata.GetType() == parameterType) {
         // Store the value of the parameter
         results.insert(
-            gd::ExpressionParser2NodePrinter::PrintNode(*node.parameters[i]));
+            gd::ExpressionParser2NodePrinter::PrintNode(*parameterNode));
       } else {
-        node.parameters[i]->Visit(*this);
+        parameterNode->Visit(*this);
       }
     }
   }
@@ -112,18 +120,87 @@ class GD_CORE_API ExpressionParameterSearcher
                              ///< account only if related to this object.
 };
 
+/**
+ * \brief Go through the events to search for variable occurrences.
+ */
+class GD_CORE_API VariableFinderEventWorker
+    : public ReadOnlyArbitraryEventsWorkerWithContext {
+ public:
+  VariableFinderEventWorker(std::set<gd::String>& results_,
+                              const gd::Platform &platform_,
+                              const gd::String& parameterType_,
+                              const gd::String& objectName_ = "")
+      : results(results_),
+        platform(platform_),
+        parameterType(parameterType_),
+        objectName(objectName_){};
+  virtual ~VariableFinderEventWorker(){};
+
+  void DoVisitInstructionList(const gd::InstructionsList& instructions,
+                                      bool areConditions) override {
+    for (std::size_t aId = 0; aId < instructions.size(); ++aId) {
+      auto& instruction = instructions[aId];
+      gd::String lastObjectParameter = "";
+      const gd::InstructionMetadata& instrInfos =
+          areConditions ? MetadataProvider::GetConditionMetadata(
+                              platform, instruction.GetType())
+                        : MetadataProvider::GetActionMetadata(
+                              platform, instruction.GetType());
+      for (std::size_t pNb = 0; pNb < instrInfos.parameters.size(); ++pNb) {
+        // The parameter has the searched type...
+        if (instrInfos.parameters[pNb].GetType() == parameterType) {
+          //...remember the value of the parameter.
+          if (objectName.empty() || lastObjectParameter == objectName)
+            results.insert(instruction.GetParameter(pNb).GetPlainString());
+        }
+        // Search in expressions
+        else if (ParameterMetadata::IsExpression(
+                    "number", instrInfos.parameters[pNb].GetType()) ||
+                ParameterMetadata::IsExpression(
+                    "string", instrInfos.parameters[pNb].GetType())) {
+          auto node = instruction.GetParameter(pNb).GetRootNode();
+
+          VariableFinderExpressionNodeWorker searcher(
+              results,
+              platform,
+              GetGlobalObjectsContainer(),
+              GetObjectsContainer(),
+              parameterType,
+              objectName);
+          node->Visit(searcher);
+        }
+        // Remember the value of the last "object" parameter.
+        else if (gd::ParameterMetadata::IsObject(
+                    instrInfos.parameters[pNb].GetType())) {
+          lastObjectParameter =
+              instruction.GetParameter(pNb).GetPlainString();
+        }
+      }
+    }
+  };
+
+ private:
+  const gd::Platform &platform;
+
+  std::set<gd::String>& results;  ///< Reference to the std::set where argument
+                                  ///< values must be stored.
+  gd::String parameterType;  ///< The type of the parameters to be searched for.
+  gd::String objectName;     ///< If not empty, parameters will be taken into
+                             ///< account only if related to this object.
+};
+} // namespace
+
 std::set<gd::String> EventsVariablesFinder::FindAllGlobalVariables(
     const gd::Platform& platform, const gd::Project& project) {
   std::set<gd::String> results;
 
   for (std::size_t i = 0; i < project.GetLayoutsCount(); ++i) {
-    std::set<gd::String> results2 =
-        FindArgumentsInEventsAndDependencies(
+    FindArgumentsInEventsAndDependencies(
+            results,
             platform,
             project,
             project.GetLayout(i),
             "globalvar");
-    results.insert(results2.begin(), results2.end());
   }
 
   return results;
@@ -135,9 +212,12 @@ std::set<gd::String> EventsVariablesFinder::FindAllLayoutVariables(
     const gd::Layout& layout) {
   std::set<gd::String> results;
 
-  std::set<gd::String> results2 = FindArgumentsInEventsAndDependencies(
-      platform, project, layout, "scenevar");
-  results.insert(results2.begin(), results2.end());
+  FindArgumentsInEventsAndDependencies(
+      results,
+      platform,
+      project,
+      layout,
+      "scenevar");
 
   return results;
 }
@@ -149,159 +229,51 @@ std::set<gd::String> EventsVariablesFinder::FindAllObjectVariables(
     const gd::Object& object) {
   std::set<gd::String> results;
 
-  std::set<gd::String> results2 = FindArgumentsInEventsAndDependencies(
+  FindArgumentsInEventsAndDependencies(
+      results,
       platform,
       project,
       layout,
       "objectvar",
       object.GetName());
-  results.insert(results2.begin(), results2.end());
 
   return results;
 }
 
-std::set<gd::String> EventsVariablesFinder::FindArgumentsInInstructions(
-    const gd::Platform& platform,
-    const gd::Project& project,
-    const gd::Layout& layout,
-    const gd::InstructionsList& instructions,
-    bool instructionsAreConditions,
-    const gd::String& parameterType,
-    const gd::String& objectName) {
-  std::set<gd::String> results;
-
-  for (std::size_t aId = 0; aId < instructions.size(); ++aId) {
-    gd::String lastObjectParameter = "";
-    const gd::InstructionMetadata& instrInfos =
-        instructionsAreConditions ? MetadataProvider::GetConditionMetadata(
-                                        platform, instructions[aId].GetType())
-                                  : MetadataProvider::GetActionMetadata(
-                                        platform, instructions[aId].GetType());
-    for (std::size_t pNb = 0; pNb < instrInfos.parameters.size(); ++pNb) {
-      // The parameter has the searched type...
-      if (instrInfos.parameters[pNb].type == parameterType) {
-        //...remember the value of the parameter.
-        if (objectName.empty() || lastObjectParameter == objectName)
-          results.insert(instructions[aId].GetParameter(pNb).GetPlainString());
-      }
-      // Search in expressions
-      else if (ParameterMetadata::IsExpression(
-                   "number", instrInfos.parameters[pNb].type) ||
-               ParameterMetadata::IsExpression(
-                   "string", instrInfos.parameters[pNb].type)) {
-        auto node = instructions[aId].GetParameter(pNb).GetRootNode();
-
-        ExpressionParameterSearcher searcher(
-            platform,
-            project,
-            layout,
-            results,
-            parameterType,
-            objectName);
-        node->Visit(searcher);
-      }
-      // Remember the value of the last "object" parameter.
-      else if (gd::ParameterMetadata::IsObject(
-                   instrInfos.parameters[pNb].type)) {
-        lastObjectParameter =
-            instructions[aId].GetParameter(pNb).GetPlainString();
-      }
-    }
-
-    if (!instructions[aId].GetSubInstructions().empty())
-      FindArgumentsInInstructions(platform,
-                                  project,
-                                  layout,
-                                  instructions[aId].GetSubInstructions(),
-                                  instructionsAreConditions,
-                                  parameterType);
-  }
-
-  return results;
-}
-
-std::set<gd::String> EventsVariablesFinder::FindArgumentsInEventsAndDependencies(
+void EventsVariablesFinder::FindArgumentsInEventsAndDependencies(
+    std::set<gd::String>& results,
     const gd::Platform& platform,
     const gd::Project& project,
     const gd::Layout& layout,
     const gd::String& parameterType,
     const gd::String& objectName) {
-  std::set<gd::String> results;
 
-  std::set<gd::String> results2 = FindArgumentsInEvents(
-      platform, project, layout, layout.GetEvents(), parameterType, objectName);
-  results.insert(results2.begin(), results2.end());
+  VariableFinderEventWorker eventWorker(results,
+                                        platform,
+                                        parameterType,
+                                        objectName);
+  eventWorker.Launch(layout.GetEvents(), project, layout);
 
   DependenciesAnalyzer dependenciesAnalyzer = DependenciesAnalyzer(project, layout);
   dependenciesAnalyzer.Analyze();
   for (const gd::String& externalEventName : dependenciesAnalyzer.GetExternalEventsDependencies()) {
     const gd::ExternalEvents& externalEvents = project.GetExternalEvents(externalEventName);
 
-    std::set<gd::String> results3 = FindArgumentsInEvents(
-        platform, project, layout, externalEvents.GetEvents(), parameterType, objectName);
-    results.insert(results3.begin(), results3.end());
+    VariableFinderEventWorker eventWorker(results,
+                                          platform,
+                                          parameterType,
+                                          objectName);
+    eventWorker.Launch(externalEvents.GetEvents(), project, layout);
   }
   for (const gd::String& sceneName : dependenciesAnalyzer.GetScenesDependencies()) {
     const gd::Layout& dependencyLayout = project.GetLayout(sceneName);
 
-    std::set<gd::String> results3 = FindArgumentsInEvents(
-        platform, project, dependencyLayout, dependencyLayout.GetEvents(), parameterType, objectName);
-    results.insert(results3.begin(), results3.end());
+    VariableFinderEventWorker eventWorker(results,
+                                          platform,
+                                          parameterType,
+                                          objectName);
+    eventWorker.Launch(dependencyLayout.GetEvents(), project, dependencyLayout);
   }
-
-  return results;
-}
-
-std::set<gd::String> EventsVariablesFinder::FindArgumentsInEvents(
-    const gd::Platform& platform,
-    const gd::Project& project,
-    const gd::Layout& layout,
-    const gd::EventsList& events,
-    const gd::String& parameterType,
-    const gd::String& objectName) {
-  std::set<gd::String> results;
-  for (std::size_t i = 0; i < events.size(); ++i) {
-    vector<const gd::InstructionsList*> conditionsVectors =
-        events[i].GetAllConditionsVectors();
-    for (std::size_t j = 0; j < conditionsVectors.size(); ++j) {
-      std::set<gd::String> results2 =
-          FindArgumentsInInstructions(platform,
-                                      project,
-                                      layout,
-                                      *conditionsVectors[j],
-                                      /*conditions=*/true,
-                                      parameterType,
-                                      objectName);
-      results.insert(results2.begin(), results2.end());
-    }
-
-    vector<const gd::InstructionsList*> actionsVectors =
-        events[i].GetAllActionsVectors();
-    for (std::size_t j = 0; j < actionsVectors.size(); ++j) {
-      std::set<gd::String> results2 =
-          FindArgumentsInInstructions(platform,
-                                      project,
-                                      layout,
-                                      *actionsVectors[j],
-                                      /*conditions=*/false,
-                                      parameterType,
-                                      objectName);
-      results.insert(results2.begin(), results2.end());
-    }
-
-    if (events[i].CanHaveSubEvents()) {
-      std::set<gd::String> results2 =
-          FindArgumentsInEvents(platform,
-                                project,
-                                layout,
-                                events[i].GetSubEvents(),
-                                parameterType,
-                                objectName);
-      results.insert(results2.begin(), results2.end());
-    }
-  }
-
-  return results;
 }
 
 }  // namespace gd

Core/GDCore/IDE/Events/EventsVariablesFinder.h

@@ -23,7 +23,6 @@ namespace gd {
  * \brief Perform a search over a project or a layout, searching for layout,
  * global or object variables.
  *
- * \todo Refactor this class using ArbitraryEventsWorker
  * \todo Rework this class to return the shapes (maybe even types?) of the
  * variables (in particular for structures and arrays), so we can use this
  * for better autocompletions in the variables dialogs in the IDE.
@@ -74,34 +73,13 @@ class EventsVariablesFinder {
       const gd::Object& object);
 
  private:
-  /**
-   * Construct a list of the value of the arguments for parameters of type @
-   * parameterType
-   *
-   * \param project The project used
-   * \param project The layout used
-   * \param instructions The instructions to be analyzed
-   * \param instructionsAreConditions True if the instructions are conditions.
-   * \param parameterType The parameters type to be analyzed
-   * \param objectName If not empty, parameters will be taken into account only
-   * if the last object parameter is filled with this value.
-   *
-   * \return A std::set filled with the values used for all parameters of the
-   * specified type
-   */
-  static std::set<gd::String> FindArgumentsInInstructions(
-      const gd::Platform& platform,
-      const gd::Project& project,
-      const gd::Layout& layout,
-      const gd::InstructionsList& instructions,
-      bool instructionsAreConditions,
-      const gd::String& parameterType,
-      const gd::String& objectName = "");
 
   /**
    * Construct a list of the value of the arguments for parameters of type @
-   * parameterType. It searchs in events dependencies.
+   * parameterType. It searches in events dependencies.
    *
+   * \param results A std::set to fill with the values used for all parameters of the
+   * specified type
    * \param platform The platform of the project
    * \param project The project used
    * \param layout The layout used
@@ -110,40 +88,14 @@ class EventsVariablesFinder {
    * \param objectName If not empty, parameters will be taken into account
    * only if the last object parameter is filled with
    * this value.
-   *
-   * \return A std::set filled with the values used for all parameters of the
-   * specified type
    */
-  static std::set<gd::String> FindArgumentsInEventsAndDependencies(
+  static void FindArgumentsInEventsAndDependencies(
+      std::set<gd::String>& results,
       const gd::Platform& platform,
       const gd::Project& project,
       const gd::Layout& layout,
       const gd::String& parameterType,
       const gd::String& objectName = "");
-
-  /**
-   * Construct a list of the value of the arguments for parameters of type @
-   * parameterType. It doesn't search in events dependencies.
-   *
-   * \param platform The platform of the project
-   * \param project The project used
-   * \param layout The layout used
-   * \param events The events to be analyzed
-   * \param parameterType The parameters type to be analyzed
-   * \param objectName If not empty, parameters will be taken into account
-   * only if the last object parameter is filled with
-   * this value.
-   *
-   * \return A std::set filled with the values used for all parameters of the
-   * specified type
-   */
-  static std::set<gd::String> FindArgumentsInEvents(
-      const gd::Platform& platform,
-      const gd::Project& project,
-      const gd::Layout& layout,
-      const gd::EventsList& events,
-      const gd::String& parameterType,
-      const gd::String& objectName);
 };
 
 }  // namespace gd

Core/GDCore/IDE/Events/ExpressionValidator.cpp

@@ -36,7 +36,7 @@ size_t GetMinimumParametersNumber(
     size_t initialParameterIndex) {
   size_t nb = 0;
   for (std::size_t i = initialParameterIndex; i < parameters.size(); ++i) {
-    if (!parameters[i].optional && !parameters[i].codeOnly) nb++;
+    if (!parameters[i].IsOptional() && !parameters[i].codeOnly) nb++;
   }
 
   return nb;

Core/GDCore/IDE/Events/ExpressionsParameterMover.cpp

@@ -78,13 +78,16 @@ class GD_CORE_API ExpressionParameterMover
   void OnVisitObjectFunctionNameNode(ObjectFunctionNameNode& node) override {}
   void OnVisitFunctionCallNode(FunctionCallNode& node) override {
     auto moveParameter =
-        [this](std::vector<std::unique_ptr<gd::ExpressionNode>>& parameters) {
-          if (oldIndex >= parameters.size() || newIndex >= parameters.size())
+        [this](std::vector<std::unique_ptr<gd::ExpressionNode>>& parameters, int firstWrittenParameterIndex) {
+          size_t newExpressionIndex = newIndex - firstWrittenParameterIndex;
+          size_t oldExpressionIndex = oldIndex - firstWrittenParameterIndex;
+
+          if (oldExpressionIndex >= parameters.size() || newExpressionIndex >= parameters.size())
             return;
 
-          auto movedParameterNode = std::move(parameters[oldIndex]);
-          parameters.erase(parameters.begin() + oldIndex);
-          parameters.insert(parameters.begin() + newIndex,
+          auto movedParameterNode = std::move(parameters[oldExpressionIndex]);
+          parameters.erase(parameters.begin() + oldExpressionIndex);
+          parameters.insert(parameters.begin() + newExpressionIndex,
                             std::move(movedParameterNode));
         };
 
@@ -92,10 +95,13 @@ class GD_CORE_API ExpressionParameterMover
       if (behaviorType.empty() && !objectType.empty() &&
           !node.objectName.empty()) {
         // Move parameter of an object function
+        // This refactor only applies on events object functions
+        // and events object functions doesn't exist yet.
+        // This is a dead code.
         const gd::String& thisObjectType = gd::GetTypeOfObject(
             globalObjectsContainer, objectsContainer, node.objectName);
         if (thisObjectType == objectType) {
-          moveParameter(node.parameters);
+          moveParameter(node.parameters, 1);
           hasDoneMoving = true;
         }
       } else if (!behaviorType.empty() && !node.behaviorName.empty()) {
@@ -103,12 +109,12 @@ class GD_CORE_API ExpressionParameterMover
         const gd::String& thisBehaviorType = gd::GetTypeOfBehavior(
             globalObjectsContainer, objectsContainer, node.behaviorName);
         if (thisBehaviorType == behaviorType) {
-          moveParameter(node.parameters);
+          moveParameter(node.parameters, 2);
           hasDoneMoving = true;
         }
       } else if (behaviorType.empty() && objectType.empty()) {
         // Move parameter of a free function
-        moveParameter(node.parameters);
+        moveParameter(node.parameters, 1);
         hasDoneMoving = true;
       }
     }
@@ -144,7 +150,7 @@ bool ExpressionsParameterMover::DoVisitInstruction(gd::Instruction& instruction,
   for (std::size_t pNb = 0; pNb < metadata.parameters.size() &&
                             pNb < instruction.GetParametersCount();
        ++pNb) {
-    const gd::String& type = metadata.parameters[pNb].type;
+    const gd::String& type = metadata.parameters[pNb].GetType();
     const gd::Expression& expression = instruction.GetParameter(pNb);
 
     auto node = expression.GetRootNode();

Core/GDCore/IDE/Events/UsedExtensionsFinder.cpp

@@ -5,7 +5,7 @@
 #include "GDCore/Extensions/PlatformExtension.h"
 #include "GDCore/IDE/WholeProjectRefactorer.h"
 #include "GDCore/IDE/Events/ExpressionTypeFinder.h"
-#include "GDCore/Project/BehaviorContent.h"
+#include "GDCore/Project/Behavior.h"
 #include "GDCore/Project/Object.h"
 #include "GDCore/Project/Project.h"
 
@@ -29,7 +29,7 @@ void UsedExtensionsFinder::DoVisitObject(gd::Object& object) {
 
 // Behaviors scanner
 
-void UsedExtensionsFinder::DoVisitBehavior(gd::BehaviorContent& behavior) {
+void UsedExtensionsFinder::DoVisitBehavior(gd::Behavior& behavior) {
   usedExtensions.insert(
       gd::MetadataProvider::GetExtensionAndBehaviorMetadata(
           project.GetCurrentPlatform(), behavior.GetTypeName())

Core/GDCore/IDE/Events/UsedExtensionsFinder.h

@@ -16,7 +16,7 @@
 namespace gd {
 class Project;
 class Object;
-class BehaviorContent;
+class Behavior;
 }  // namespace gd
 
 namespace gd {
@@ -38,7 +38,7 @@ class GD_CORE_API UsedExtensionsFinder
   void DoVisitObject(gd::Object& object) override;
 
   // Behavior Visitor
-  void DoVisitBehavior(gd::BehaviorContent& behavior) override;
+  void DoVisitBehavior(gd::Behavior& behavior) override;
 
   // Instructions Visitor
   bool DoVisitInstruction(gd::Instruction& instruction,

Core/GDCore/IDE/EventsFunctionTools.cpp

@@ -8,9 +8,10 @@
 #include "GDCore/Events/Expression.h"
 #include "GDCore/Extensions/Metadata/ParameterMetadataTools.h"
 #include "GDCore/Project/EventsBasedBehavior.h"
+#include "GDCore/Project/EventsBasedObject.h"
+//#include "GDCore/Project/ObjectsContainer.h"
 #include "GDCore/Project/EventsFunction.h"
 #include "GDCore/Project/Object.h"
-#include "GDCore/Project/ObjectsContainer.h"
 #include "GDCore/Project/Project.h"
 #include "GDCore/String.h"
 #include "GDCore/Tools/Log.h"
@@ -19,6 +20,7 @@ namespace gd {
 
 void EventsFunctionTools::FreeEventsFunctionToObjectsContainer(
     const gd::Project& project,
+    const gd::EventsFunctionsContainer functionContainer,
     const gd::EventsFunction& eventsFunction,
     gd::ObjectsContainer& outputGlobalObjectsContainer,
     gd::ObjectsContainer& outputObjectsContainer) {
@@ -30,8 +32,12 @@ void EventsFunctionTools::FreeEventsFunctionToObjectsContainer(
   // to parameters
   outputObjectsContainer.GetObjects().clear();
   outputObjectsContainer.GetObjectGroups().Clear();
+
+  auto &parameters = eventsFunction.GetParametersForEvents(functionContainer);
   gd::ParameterMetadataTools::ParametersToObjectsContainer(
-      project, eventsFunction.GetParameters(), outputObjectsContainer);
+      project,
+      parameters,
+      outputObjectsContainer);
   outputObjectsContainer.GetObjectGroups() = eventsFunction.GetObjectGroups();
 }
 
@@ -43,6 +49,7 @@ void EventsFunctionTools::BehaviorEventsFunctionToObjectsContainer(
     gd::ObjectsContainer& outputObjectsContainer) {
   // The context is build the same way as free function...
   FreeEventsFunctionToObjectsContainer(project,
+                                       eventsBasedBehavior.GetEventsFunctions(),
                                        eventsFunction,
                                        outputGlobalObjectsContainer,
                                        outputObjectsContainer);
@@ -72,4 +79,40 @@ void EventsFunctionTools::BehaviorEventsFunctionToObjectsContainer(
   }
 }
 
+void EventsFunctionTools::ObjectEventsFunctionToObjectsContainer(
+    const gd::Project& project,
+    const gd::EventsBasedObject& eventsBasedObject,
+    const gd::EventsFunction& eventsFunction,
+    gd::ObjectsContainer& outputGlobalObjectsContainer,
+    gd::ObjectsContainer& outputObjectsContainer) {
+  // The context is build the same way as free function...
+  FreeEventsFunctionToObjectsContainer(project,
+                                       eventsBasedObject.GetEventsFunctions(),
+                                       eventsFunction,
+                                       outputGlobalObjectsContainer,
+                                       outputObjectsContainer);
+
+  // TODO EBO Use a constant instead a hard coded value "Object".
+  // ...and has an "Object" by convention...
+  if (!outputObjectsContainer.HasObjectNamed("Object")) {
+    gd::LogWarning("No \"Object\" in a function of an events based object: " +
+                   eventsFunction.GetName() +
+                   ". This means this function is likely misconfigured (check "
+                   "its parameters).");
+    return;
+  }
+  if (eventsBasedObject.HasObjectNamed("Object")) {
+    gd::LogWarning("Child-objects can't be named Object because it's reserved"
+                  "for the parent. ");
+    return;
+  }
+
+  // ...and its children.
+  auto &children = eventsBasedObject.GetObjects();
+  for (auto &childObject : children) {
+    auto child = childObject.get();
+    outputObjectsContainer.InsertObject(*child, children.size());
+  }
+}
+
 }  // namespace gd

Core/GDCore/IDE/EventsFunctionTools.h

@@ -10,10 +10,12 @@
 #include "GDCore/String.h"
 namespace gd {
 class Project;
+class EventsFunctionsContainer;
 class ObjectsContainer;
 class ParameterMetadata;
 class EventsFunction;
 class EventsBasedBehavior;
+class EventsBasedObject;
 class Expression;
 }  // namespace gd
 
@@ -33,6 +35,7 @@ class GD_CORE_API EventsFunctionTools {
    */
   static void FreeEventsFunctionToObjectsContainer(
       const gd::Project& project,
+      const gd::EventsFunctionsContainer functionContainer,
       const gd::EventsFunction& eventsFunction,
       gd::ObjectsContainer& outputGlobalObjectsContainer,
       gd::ObjectsContainer& outputObjectsContainer);
@@ -51,6 +54,21 @@ class GD_CORE_API EventsFunctionTools {
       const gd::EventsFunction& eventsFunction,
       gd::ObjectsContainer& outputGlobalObjectsContainer,
       gd::ObjectsContainer& outputObjectsContainer);
+  /**
+   * \brief Given a parent-object events function, initialize the given objects container
+   * with objects described in the events function parameters, in
+   * the events function groups and in the parent-object properties for
+   * child-objects.
+   *
+   * This is useful to create the "context" of a function, before code
+   * generation for example.
+   */
+  static void ObjectEventsFunctionToObjectsContainer(
+      const gd::Project& project,
+      const gd::EventsBasedObject& eventsBasedObject,
+      const gd::EventsFunction& eventsFunction,
+      gd::ObjectsContainer& outputGlobalObjectsContainer,
+      gd::ObjectsContainer& outputObjectsContainer);
 };
 }  // namespace gd
 

Core/GDCore/IDE/Project/ArbitraryObjectsWorker.cpp

@@ -10,7 +10,7 @@
 #include <memory>
 #include <vector>
 
-#include "GDCore/Project/BehaviorContent.h"
+#include "GDCore/Project/Behavior.h"
 #include "GDCore/Project/Object.h"
 #include "GDCore/Project/ObjectsContainer.h"
 #include "GDCore/String.h"
@@ -36,7 +36,7 @@ void ArbitraryObjectsWorker::VisitObject(gd::Object& object) {
     VisitBehavior(object.GetBehavior(behaviorName));
 }
 
-void ArbitraryObjectsWorker::VisitBehavior(gd::BehaviorContent& behavior) {
+void ArbitraryObjectsWorker::VisitBehavior(gd::Behavior& behavior) {
   DoVisitBehavior(behavior);
 }
 

Core/GDCore/IDE/Project/ArbitraryObjectsWorker.h

@@ -15,7 +15,7 @@
 namespace gd {
 class Object;
 class ObjectsContainer;
-class BehaviorContent;
+class Behavior;
 }  // namespace gd
 
 namespace gd {
@@ -40,7 +40,7 @@ class GD_CORE_API ArbitraryObjectsWorker {
  private:
   void VisitObjectContainer(gd::ObjectsContainer& objects);
   void VisitObject(gd::Object& object);
-  void VisitBehavior(gd::BehaviorContent& instruction);
+  void VisitBehavior(gd::Behavior& behavior);
 
   /**
    * Called to do some work on an object container.
@@ -55,7 +55,7 @@ class GD_CORE_API ArbitraryObjectsWorker {
   /**
    * Called to do some work on a behavior.
    */
-  virtual void DoVisitBehavior(gd::BehaviorContent& instruction){};
+  virtual void DoVisitBehavior(gd::Behavior& behavior){};
 };
 
 }  // namespace gd

Core/GDCore/IDE/Project/ArbitraryResourceWorker.cpp

@@ -111,7 +111,7 @@ class ResourceWorkerInEventsWorker : public ArbitraryEventsWorker {
   ResourceWorkerInEventsWorker(const gd::Project& project_,
                                gd::ArbitraryResourceWorker& worker_)
       : project(project_), worker(worker_){};
-  virtual ~ResourceWorkerInEventsWorker() {};
+  virtual ~ResourceWorkerInEventsWorker(){};
 
  private:
   bool DoVisitInstruction(gd::Instruction& instruction, bool isCondition) {
@@ -131,7 +131,8 @@ class ResourceWorkerInEventsWorker : public ArbitraryEventsWorker {
                              const gd::String& lastObjectName) {
           const String& parameterValue = parameterExpression.GetPlainString();
           if (parameterMetadata.GetType() ==
-              "police") {  // Should be renamed fontResource
+                  "police" ||  // Should be renamed fontResource
+              parameterMetadata.GetType() == "fontResource") {
             gd::String updatedParameterValue = parameterValue;
             worker.ExposeFont(updatedParameterValue);
             instruction.SetParameter(parameterIndex, updatedParameterValue);
@@ -149,6 +150,10 @@ class ResourceWorkerInEventsWorker : public ArbitraryEventsWorker {
             gd::String updatedParameterValue = parameterValue;
             worker.ExposeImage(updatedParameterValue);
             instruction.SetParameter(parameterIndex, updatedParameterValue);
+          } else if (parameterMetadata.GetType() == "jsonResource") {
+            gd::String updatedParameterValue = parameterValue;
+            worker.ExposeJson(updatedParameterValue);
+            instruction.SetParameter(parameterIndex, updatedParameterValue);
           }
         });
 

Core/GDCore/IDE/ProjectStripper.cpp

@@ -5,6 +5,8 @@
  */
 #include "ProjectStripper.h"
 
+#include "GDCore/Project/EventsFunctionsContainer.h"
+#include "GDCore/Project/EventsFunctionsExtension.h"
 #include "GDCore/Project/ExternalEvents.h"
 #include "GDCore/Project/ExternalLayout.h"
 #include "GDCore/Project/Layout.h"
@@ -12,7 +14,7 @@
 
 namespace gd {
 
-void GD_CORE_API ProjectStripper::StripProjectForExport(gd::Project& project) {
+void GD_CORE_API ProjectStripper::StripProjectForExport(gd::Project &project) {
   project.GetObjectGroups().Clear();
   while (project.GetExternalEventsCount() > 0)
     project.RemoveExternalEvents(project.GetExternalEvents(0).GetName());
@@ -22,7 +24,28 @@ void GD_CORE_API ProjectStripper::StripProjectForExport(gd::Project& project) {
     project.GetLayout(i).GetEvents().Clear();
   }
 
-  project.ClearEventsFunctionsExtensions();
+  // Keep the EventsBasedObject object list because it's useful for the Runtime
+  // to create the child-object.
+  for (unsigned int extensionIndex = 0;
+       extensionIndex < project.GetEventsFunctionsExtensionsCount();
+       ++extensionIndex) {
+    auto &extension = project.GetEventsFunctionsExtension(extensionIndex);
+    auto &eventsBasedObjects = extension.GetEventsBasedObjects();
+    if (eventsBasedObjects.size() == 0) {
+      project.RemoveEventsFunctionsExtension(extension.GetName());
+      extensionIndex--;
+      continue;
+    }
+    for (unsigned int objectIndex = 0; objectIndex < eventsBasedObjects.size();
+         ++objectIndex) {
+      auto &eventsBasedObject = eventsBasedObjects.at(objectIndex);
+      eventsBasedObject.SetFullName("");
+      eventsBasedObject.SetDescription("");
+      eventsBasedObject.GetEventsFunctions().GetInternalVector().clear();
+      eventsBasedObject.GetPropertyDescriptors().GetInternalVector().clear();
+    }
+    extension.GetEventsBasedBehaviors().Clear();
+  }
 }
 
-}  // namespace gd
+} // namespace gd

Core/GDCore/IDE/UnfilledRequiredBehaviorPropertyProblem.h

@@ -11,7 +11,7 @@
 namespace gd {
 class Project;
 class Object;
-class BehaviorContent;
+class Behavior;
 }  // namespace gd
 
 namespace gd {
@@ -24,12 +24,12 @@ class GD_CORE_API UnfilledRequiredBehaviorPropertyProblem {
   UnfilledRequiredBehaviorPropertyProblem(
       const gd::Project& sourceProject_,
       gd::Object& sourceObject_,
-      gd::BehaviorContent& sourceBehaviorContent_,
+      gd::Behavior& sourceBehavior_,
       const gd::String& sourcePropertyName_,
       const gd::String& expectedBehaviorTypeName_)
       : sourceProject(sourceProject_),
       sourceObject(sourceObject_),
-      sourceBehaviorContent(sourceBehaviorContent_),
+      sourceBehavior(sourceBehavior_),
       sourcePropertyName(sourcePropertyName_),
       expectedBehaviorTypeName(expectedBehaviorTypeName_){};
   virtual ~UnfilledRequiredBehaviorPropertyProblem();
@@ -47,8 +47,8 @@ class GD_CORE_API UnfilledRequiredBehaviorPropertyProblem {
   /**
    * \brief Return the behavior where the problem appears.
    */
-  virtual gd::BehaviorContent& GetSourceBehaviorContent() const {
-    return sourceBehaviorContent;
+  virtual gd::Behavior& GetSourceBehaviorContent() const {
+    return sourceBehavior;
   }
 
   /**
@@ -69,7 +69,7 @@ class GD_CORE_API UnfilledRequiredBehaviorPropertyProblem {
  private:
   const gd::Project& sourceProject;
   gd::Object& sourceObject;
-  gd::BehaviorContent& sourceBehaviorContent;
+  gd::Behavior& sourceBehavior;
   const gd::String sourcePropertyName;
 
   const gd::String expectedBehaviorTypeName;

Core/GDCore/IDE/WholeProjectRefactorer.h

@@ -18,11 +18,11 @@ class EventsFunctionsExtension;
 class EventsFunction;
 class ObjectsContainer;
 class EventsBasedBehavior;
+class EventsBasedObject;
 class ArbitraryEventsWorker;
 class ArbitraryObjectsWorker;
 class ArbitraryEventsWorkerWithContext;
 class Behavior;
-class BehaviorContent;
 class BehaviorMetadata;
 class UnfilledRequiredBehaviorPropertyProblem;
 }  // namespace gd
@@ -61,13 +61,24 @@ class GD_CORE_API WholeProjectRefactorer {
    * \brief Call the specified worker on all events of the events based behavior
    *
    * This should be the preferred way to traverse all the events of an events
-   * based behavior
+   * based behavior.
    */
   static void ExposeEventsBasedBehaviorEvents(
       gd::Project& project,
       const gd::EventsBasedBehavior& eventsBasedBehavior,
       gd::ArbitraryEventsWorkerWithContext& worker);
 
+  /**
+   * \brief Call the specified worker on all events of the events based object
+   *
+   * This should be the preferred way to traverse all the events of an events
+   * based object.
+   */
+  static void ExposeEventsBasedObjectEvents(
+      gd::Project& project,
+      const gd::EventsBasedObject& eventsBasedObject,
+      gd::ArbitraryEventsWorkerWithContext& worker);
+
   /**
    * \brief Call the specified worker on all ObjectContainers of the project
    * (global, layouts...)
@@ -119,6 +130,21 @@ class GD_CORE_API WholeProjectRefactorer {
       const gd::String& oldFunctionName,
       const gd::String& newFunctionName);
 
+  /**
+   * \brief Refactor the project **before** an events function of an object is
+   * renamed.
+   *
+   * \warning Do the renaming of the specified function after calling this.
+   * This is because the function is expected to have its old name for the
+   * refactoring.
+   */
+  static void RenameObjectEventsFunction(
+      gd::Project& project,
+      const gd::EventsFunctionsExtension& eventsFunctionsExtension,
+      const gd::EventsBasedObject& eventsBasedObject,
+      const gd::String& oldFunctionName,
+      const gd::String& newFunctionName);
+
   /**
    * \brief Refactor the project **before** an events function parameter
    * is moved.
@@ -150,6 +176,22 @@ class GD_CORE_API WholeProjectRefactorer {
       std::size_t oldIndex,
       std::size_t newIndex);
 
+  /**
+   * \brief Refactor the project **before** the parameter of an events function
+   * of an object is moved.
+   *
+   * \warning Do the move of the specified function parameters after calling
+   * this. This is because the function is expected to be in its old state for
+   * the refactoring.
+   */
+  static void MoveObjectEventsFunctionParameter(
+      gd::Project& project,
+      const gd::EventsFunctionsExtension& eventsFunctionsExtension,
+      const gd::EventsBasedObject& eventsBasedObject,
+      const gd::String& functionName,
+      std::size_t oldIndex,
+      std::size_t newIndex);
+
   /**
    * \brief Refactor the project **before** a property of a behavior is
    * renamed.
@@ -165,6 +207,21 @@ class GD_CORE_API WholeProjectRefactorer {
       const gd::String& oldPropertyName,
       const gd::String& newPropertyName);
 
+  /**
+   * \brief Refactor the project **before** a property of an object is
+   * renamed.
+   *
+   * \warning Do the renaming of the specified property after calling this.
+   * This is because the property is expected to have its old name for the
+   * refactoring.
+   */
+  static void RenameEventsBasedObjectProperty(
+      gd::Project& project,
+      const gd::EventsFunctionsExtension& eventsFunctionsExtension,
+      const gd::EventsBasedObject& eventsBasedObject,
+      const gd::String& oldPropertyName,
+      const gd::String& newPropertyName);
+
   /**
    * \brief Add a behavior to an object and add required behaviors if necessary
    * to fill every behavior properties of the added behaviors.
@@ -217,6 +274,19 @@ class GD_CORE_API WholeProjectRefactorer {
       const gd::String& oldBehaviorName,
       const gd::String& newBehaviorName);
 
+  /**
+   * \brief Refactor the project **before** an object is renamed.
+   *
+   * \warning Do the renaming of the specified object after calling this.
+   * This is because the object is expected to have its old name for the
+   * refactoring.
+   */
+  static void RenameEventsBasedObject(
+      gd::Project& project,
+      const gd::EventsFunctionsExtension& eventsFunctionsExtension,
+      const gd::String& oldObjectName,
+      const gd::String& newObjectName);
+
   /**
    * \brief Refactor the project after an object is renamed in a layout
    *
@@ -241,6 +311,34 @@ class GD_CORE_API WholeProjectRefactorer {
                                            bool isObjectGroup,
                                            bool removeEventsAndGroups = true);
 
+  /**
+   * \brief Refactor the project after an object is removed in an events-based
+   * object.
+   *
+   * This will update the events of the function and groups.
+   */
+  static void ObjectOrGroupRemovedInEventsBasedObject(
+      gd::Project& project,
+      gd::EventsBasedObject& eventsBasedObject,
+      gd::ObjectsContainer& globalObjectsContainer,
+      gd::ObjectsContainer& objectsContainer,
+      const gd::String& objectName,
+      bool isObjectGroup,
+      bool removeEventsAndGroups);
+
+  /**
+   * \brief Refactor the events function after an object or group is renamed
+   *
+   * This will update the events of the function and groups.
+   */
+  static void ObjectOrGroupRenamedInEventsBasedObject(
+      gd::Project& project,
+      gd::ObjectsContainer& globalObjectsContainer,
+      gd::EventsBasedObject& eventsBasedObject,
+      const gd::String& oldName,
+      const gd::String& newName,
+      bool isObjectGroup);
+
   /**
    * \brief Refactor the events function after an object or group is renamed
    *
@@ -309,6 +407,14 @@ class GD_CORE_API WholeProjectRefactorer {
       const gd::EventsFunctionsExtension& eventsFunctionsExtension,
       const gd::EventsBasedBehavior& eventsBasedBehavior);
 
+  /**
+   * \brief Ensure (adding if necessary) that the functions of the given
+   * object have the proper mandatory parameters (the "Object").
+   */
+  static void EnsureObjectEventsFunctionsProperParameters(
+      const gd::EventsFunctionsExtension& eventsFunctionsExtension,
+      const gd::EventsBasedObject& eventsBasedObject);
+
   virtual ~WholeProjectRefactorer(){};
 
  private:
@@ -324,6 +430,10 @@ class GD_CORE_API WholeProjectRefactorer {
                                const gd::String& oldBehaviorType,
                                const gd::String& newBehaviorType);
 
+  static void DoRenameObject(gd::Project& project,
+                             const gd::String& oldObjectType,
+                             const gd::String& newObjectType);
+
   static void FindDependentBehaviorNames(
       const gd::Project& project,
       const gd::Object& object,
@@ -331,6 +441,7 @@ class GD_CORE_API WholeProjectRefactorer {
       std::unordered_set<gd::String>& dependentBehaviorNames);
 
   static const gd::String behaviorObjectParameterName;
+  static const gd::String parentObjectParameterName;
 
   WholeProjectRefactorer(){};
 };

Core/GDCore/Project/AbstractEventsBasedEntity.cpp

@@ -0,0 +1,44 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#include "AbstractEventsBasedEntity.h"
+#include "EventsFunctionsContainer.h"
+#include "GDCore/Serialization/SerializerElement.h"
+#include "GDCore/Tools/MakeUnique.h"
+
+namespace gd {
+
+AbstractEventsBasedEntity::AbstractEventsBasedEntity(
+    const gd::String& _name,
+    gd::EventsFunctionsContainer::FunctionOwner functionContainerSource)
+    : name(_name), fullName(""), eventsFunctionsContainer(functionContainerSource) {}
+
+void AbstractEventsBasedEntity::SerializeTo(SerializerElement& element) const {
+  element.SetAttribute("description", description);
+  element.SetAttribute("name", name);
+  element.SetAttribute("fullName", fullName);
+
+  gd::SerializerElement& eventsFunctionsElement =
+      element.AddChild("eventsFunctions");
+  eventsFunctionsContainer.SerializeEventsFunctionsTo(eventsFunctionsElement);
+  propertyDescriptors.SerializeElementsTo(
+      "propertyDescriptor", element.AddChild("propertyDescriptors"));
+}
+
+void AbstractEventsBasedEntity::UnserializeFrom(gd::Project& project,
+                                          const SerializerElement& element) {
+  description = element.GetStringAttribute("description");
+  name = element.GetStringAttribute("name");
+  fullName = element.GetStringAttribute("fullName");
+
+  const gd::SerializerElement& eventsFunctionsElement =
+      element.GetChild("eventsFunctions");
+  eventsFunctionsContainer.UnserializeEventsFunctionsFrom(
+      project, eventsFunctionsElement);
+  propertyDescriptors.UnserializeElementsFrom(
+      "propertyDescriptor", element.GetChild("propertyDescriptors"));
+}
+
+}  // namespace gd

Core/GDCore/Project/AbstractEventsBasedEntity.h

@@ -0,0 +1,153 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#ifndef GDCORE_ABSTRACTEVENTSBASEDENTITY_H
+#define GDCORE_ABSTRACTEVENTSBASEDENTITY_H
+
+#include <vector>
+#include "GDCore/Project/NamedPropertyDescriptor.h"
+#include "GDCore/Tools/SerializableWithNameList.h"
+#include "GDCore/Project/EventsFunctionsContainer.h"
+#include "GDCore/String.h"
+namespace gd {
+class SerializerElement;
+class Project;
+}  // namespace gd
+
+namespace gd {
+
+/**
+ * \brief Represents a behavior or an object that is implemented with events.
+ *
+ * It's the responsibility of the IDE to run the logic to transform this into a
+ * real behavior or object, by declaring an extension and running code generation.
+ * See `EventsFunctionsExtensionsLoader`.
+ *
+ * \ingroup PlatformDefinition
+ */
+class GD_CORE_API AbstractEventsBasedEntity {
+ public:
+  AbstractEventsBasedEntity(
+      const gd::String& _name,
+      gd::EventsFunctionsContainer::FunctionOwner functionContainerSource);
+  virtual ~AbstractEventsBasedEntity(){};
+
+  /**
+   * \brief Return a pointer to a new AbstractEventsBasedEntity constructed from
+   * this one.
+   */
+  AbstractEventsBasedEntity* Clone() const { return new AbstractEventsBasedEntity(*this); };
+
+  /**
+   * \brief Get the description of the behavior or object, that is displayed in the
+   * editor.
+   */
+  const gd::String& GetDescription() const { return description; };
+
+  /**
+   * \brief Set the description of the behavior or object, to be displayed in the editor.
+   */
+  virtual AbstractEventsBasedEntity& SetDescription(const gd::String& description_) {
+    description = description_;
+    return *this;
+  }
+
+  /**
+   * \brief Get the internal name of the behavior or object.
+   */
+  const gd::String& GetName() const { return name; };
+
+  /**
+   * \brief Set the internal name of the behavior or object.
+   */
+  AbstractEventsBasedEntity& SetName(const gd::String& name_) {
+    name = name_;
+    return *this;
+  }
+
+  /**
+   * \brief Get the name of the behavior or object, that is displayed in the editor.
+   */
+  const gd::String& GetFullName() const { return fullName; };
+
+  /**
+   * \brief Set the name of the behavior or object, to be displayed in the editor.
+   */
+  AbstractEventsBasedEntity& SetFullName(const gd::String& fullName_) {
+    fullName = fullName_;
+    return *this;
+  }
+
+  /**
+   * \brief Return a reference to the functions of the events based behavior or object.
+   */
+  EventsFunctionsContainer& GetEventsFunctions() {
+    return eventsFunctionsContainer;
+  }
+
+  /**
+   * \brief Return a const reference to the functions of the events based
+   * behavior or object.
+   */
+  const EventsFunctionsContainer& GetEventsFunctions() const {
+    return eventsFunctionsContainer;
+  }
+
+  /**
+   * \brief Return a reference to the list of the properties.
+   */
+  SerializableWithNameList<NamedPropertyDescriptor>& GetPropertyDescriptors() {
+    return propertyDescriptors;
+  }
+
+  /**
+   * \brief Return a const reference to the list of the properties.
+   */
+  const SerializableWithNameList<NamedPropertyDescriptor>& GetPropertyDescriptors()
+      const {
+    return propertyDescriptors;
+  }
+
+  /**
+   * \brief Get the name of the action to change a property.
+   */
+  static gd::String GetPropertyActionName(const gd::String& propertyName) { return "SetProperty" + propertyName; };
+
+  /**
+   * \brief Get the name of the condition to compare a property.
+   */
+  static gd::String GetPropertyConditionName(const gd::String& propertyName) { return "Property" + propertyName; };
+
+  /**
+   * \brief Get the name of the expression to get a property.
+   */
+  static gd::String GetPropertyExpressionName(const gd::String& propertyName) { return "Property" + propertyName; };
+
+  /** \name Serialization
+   */
+  ///@{
+  /**
+   * \brief Serialize the AbstractEventsBasedEntity to the specified element
+   */
+  virtual void SerializeTo(gd::SerializerElement& element) const;
+
+  /**
+   * \brief Load the AbstractEventsBasedEntity from the specified element
+   */
+  virtual void UnserializeFrom(gd::Project& project,
+                       const gd::SerializerElement& element);
+  ///@}
+
+ private:
+  gd::String name;
+  gd::String fullName;
+  gd::String description;
+  gd::EventsFunctionsContainer eventsFunctionsContainer;
+  SerializableWithNameList<NamedPropertyDescriptor> propertyDescriptors;
+};
+
+}  // namespace gd
+
+#endif  // GDCORE_ABSTRACTEVENTSBASEDENTITY_H

Core/GDCore/Project/Behavior.cpp

@@ -5,20 +5,10 @@
  */
 #include "GDCore/Project/Behavior.h"
 #include <iostream>
-#if defined(GD_IDE_ONLY)
 #include "GDCore/Project/PropertyDescriptor.h"
-#endif
 
 namespace gd {
 
 Behavior::~Behavior(){};
 
-#if defined(GD_IDE_ONLY)
-std::map<gd::String, gd::PropertyDescriptor> Behavior::GetProperties(
-    const gd::SerializerElement& behaviorContent) const {
-  std::map<gd::String, gd::PropertyDescriptor> nothing;
-  return nothing;
-}
-#endif
-
 }  // namespace gd

Core/GDCore/Project/Behavior.h

@@ -5,86 +5,28 @@
  */
 #ifndef GDCORE_BEHAVIOR_H
 #define GDCORE_BEHAVIOR_H
-#include <map>
+
 #include "GDCore/String.h"
-#if defined(GD_IDE_ONLY)
-namespace gd {
-class PropertyDescriptor;
-}
-#endif
-namespace gd {
-class SerializerElement;
-class Project;
-class Layout;
-}  // namespace gd
+#include "GDCore/Project/BehaviorConfigurationContainer.h"
 
 namespace gd {
 
 /**
  * \brief Base class used to represents a behavior that can be applied to an
- * object
+ * object. It stores the content (i.e: the properties) of a behavior of an object.
  *
- * \see gd::BehaviorContent
  * \see gd::BehaviorsSharedData
+ * \see gd::Object
  * \ingroup PlatformDefinition
  */
-class GD_CORE_API Behavior {
+class GD_CORE_API Behavior: public BehaviorConfigurationContainer {
  public:
-  Behavior(){};
+
+  Behavior(): BehaviorConfigurationContainer() {};
+  Behavior(const gd::String& name_, const gd::String& type_)
+      : BehaviorConfigurationContainer(name_, type_) {};
   virtual ~Behavior();
-  virtual Behavior* Clone() const { return new Behavior(*this); }
-
-  /**
-   * \brief Return the type of the behavior
-   */
-  const gd::String& GetTypeName() const { return type; }
-
-  /**
-   * \brief Set the type of the behavior.
-   */
-  void SetTypeName(const gd::String& type_) { type = type_; };
-
-#if defined(GD_IDE_ONLY)
-  /**
-   * \brief Called when the IDE wants to know about the custom properties of the
-   * behavior.
-   *
-   * Implementation example:
-   \code
-      std::map<gd::String, gd::PropertyDescriptor> properties;
-      properties[_("Initial speed")].SetValue(gd::String::From(initialSpeed));
-
-      return properties;
-   \endcode
-   *
-   * \return a std::map with properties names as key.
-   * \see gd::PropertyDescriptor
-   */
-  virtual std::map<gd::String, gd::PropertyDescriptor> GetProperties(
-      const gd::SerializerElement& behaviorContent) const;
-
-  /**
-   * \brief Called when the IDE wants to update a custom property of the
-   * behavior
-   *
-   * \return false if the new value cannot be set
-   * \see gd::InitialInstance
-   */
-  virtual bool UpdateProperty(gd::SerializerElement& behaviorContent,
-                              const gd::String& name,
-                              const gd::String& value) {
-    return false;
-  };
-#endif
-
-  /**
-   * \brief Called to initialize the content with the default properties
-   * for the behavior.
-   */
-  virtual void InitializeContent(gd::SerializerElement& behaviorContent){};
-
- private:
-  gd::String type;
+  virtual Behavior* Clone() const override { return new Behavior(*this); }
 };
 
 }  // namespace gd

Core/GDCore/Project/BehaviorConfigurationContainer.cpp

@@ -0,0 +1,25 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#include "GDCore/Project/BehaviorConfigurationContainer.h"
+#include <iostream>
+#include "GDCore/Project/PropertyDescriptor.h"
+
+namespace gd {
+
+BehaviorConfigurationContainer::~BehaviorConfigurationContainer(){};
+
+
+std::map<gd::String, gd::PropertyDescriptor> BehaviorConfigurationContainer::GetProperties() const {
+    return GetProperties(content);
+  };
+
+std::map<gd::String, gd::PropertyDescriptor> BehaviorConfigurationContainer::GetProperties(
+    const gd::SerializerElement& behaviorContent) const {
+  std::map<gd::String, gd::PropertyDescriptor> nothing;
+  return nothing;
+}
+
+}  // namespace gd

Core/GDCore/Project/BehaviorConfigurationContainer.h

@@ -0,0 +1,155 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#ifndef GDCORE_BEHAVIORCONFIGURATIONCONTAINER_H
+#define GDCORE_BEHAVIORCONFIGURATIONCONTAINER_H
+
+#include <map>
+#include <memory>
+#include "GDCore/Serialization/Serializer.h"
+#include "GDCore/String.h"
+
+namespace gd {
+class PropertyDescriptor;
+class SerializerElement;
+class Project;
+class Layout;
+}  // namespace gd
+
+namespace gd {
+
+/**
+ * \brief Base class for containers of behavior configuration.
+ * They can be attached to objects (Behavior) or layouts (BehaviorsSharedData).
+ * It stores the content (i.e: the properties) of a behavior of an object.
+ *
+ * \see gd::Behavior
+ * \see gd::BehaviorsSharedData
+ * \ingroup PlatformDefinition
+ */
+class GD_CORE_API BehaviorConfigurationContainer {
+ public:
+
+  BehaviorConfigurationContainer(){};
+  BehaviorConfigurationContainer(const gd::String& name_, const gd::String& type_)
+      : name(name_), type(type_){};
+  virtual ~BehaviorConfigurationContainer();
+  virtual BehaviorConfigurationContainer* Clone() const { return new BehaviorConfigurationContainer(*this); }
+
+  /**
+   * \brief Return the name identifying the behavior
+   */
+  const gd::String& GetName() const { return name; }
+
+  /**
+   * \brief Change the name identifying the behavior
+   */
+  void SetName(const gd::String& name_) { name = name_; }
+
+  /**
+   * \brief Return the type of the behavior
+   */
+  const gd::String& GetTypeName() const { return type; }
+
+  /**
+   * \brief Set the type of the behavior.
+   */
+  void SetTypeName(const gd::String& type_) { type = type_; };
+
+  /**
+   * \brief Called when the IDE wants to know about the custom properties of the
+   * behavior.
+   * 
+   * \return a std::map with properties names as key.
+   * \see gd::PropertyDescriptor
+   */
+  std::map<gd::String, gd::PropertyDescriptor> GetProperties() const;
+
+
+  /**
+   * \brief Called when the IDE wants to update a custom property of the
+   * behavior
+   *
+   * \return false if the new value cannot be set
+   * \see gd::InitialInstance
+   */
+  bool UpdateProperty(const gd::String& name, const gd::String& value) {
+    return UpdateProperty(content, name, value);
+  };
+
+  /**
+   * \brief Called to initialize the content with the default properties
+   * for the behavior.
+   */
+  virtual void InitializeContent() {
+    InitializeContent(content);
+  };
+
+  /**
+   * \brief Serialize the behavior content.
+   */
+  virtual void SerializeTo(gd::SerializerElement& element) const {
+    element = content;
+  };
+
+  /**
+   * \brief Unserialize the behavior content.
+   */
+  virtual void UnserializeFrom(const gd::SerializerElement& element) {
+    content = element;
+  };
+
+  const gd::SerializerElement& GetContent() const { return content; };
+  gd::SerializerElement& GetContent() { return content; };
+
+protected:
+  /**
+   * \brief Called when the IDE wants to know about the custom properties of the
+   * behavior.
+   *
+   * Implementation example:
+   \code
+      std::map<gd::String, gd::PropertyDescriptor> properties;
+      properties[_("Initial speed")].SetValue(gd::String::From(initialSpeed));
+
+      return properties;
+   \endcode
+   *
+   * \return a std::map with properties names as key.
+   * \see gd::PropertyDescriptor
+   */
+  virtual std::map<gd::String, gd::PropertyDescriptor> GetProperties(
+      const gd::SerializerElement& behaviorContent) const;
+
+  /**
+   * \brief Called when the IDE wants to update a custom property of the
+   * behavior
+   *
+   * \return false if the new value cannot be set
+   * \see gd::InitialInstance
+   */
+  virtual bool UpdateProperty(gd::SerializerElement& behaviorContent,
+                              const gd::String& name,
+                              const gd::String& value) {
+    return false;
+  };
+
+  /**
+   * \brief Called to initialize the content with the default properties
+   * for the behavior.
+   */
+  virtual void InitializeContent(gd::SerializerElement& behaviorContent){};
+
+ private:
+  gd::String name;  ///< Name of the behavior
+  gd::String type;  ///< The type of the behavior that is represented. Usually
+                    ///< in the form "ExtensionName::BehaviorTypeName"
+
+  gd::SerializerElement content;  // Storage for the behavior properties
+};
+
+}  // namespace gd
+
+#endif  // GDCORE_BEHAVIORCONFIGURATIONCONTAINER_H

Core/GDCore/Project/BehaviorContent.cpp

@@ -1,12 +0,0 @@
-/*
- * GDevelop Core
- * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
- * reserved. This project is released under the MIT License.
- */
-#include "GDCore/Project/BehaviorContent.h"
-
-namespace gd {
-
-BehaviorContent::~BehaviorContent(){};
-
-}  // namespace gd

Core/GDCore/Project/BehaviorContent.h

@@ -1,88 +0,0 @@
-/*
- * GDevelop Core
- * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
- * reserved. This project is released under the MIT License.
- */
-#ifndef GDCORE_BEHAVIORCONTENT_H
-#define GDCORE_BEHAVIORCONTENT_H
-#include <map>
-#include "GDCore/Serialization/Serializer.h"
-#include "GDCore/String.h"
-#if defined(GD_IDE_ONLY)
-namespace gd {
-class PropertyDescriptor;
-}
-#endif
-namespace gd {
-class SerializerElement;
-class Project;
-class Layout;
-}  // namespace gd
-
-namespace gd {
-
-/**
- * \brief Store the content (i.e: the properties) of a behavior of an object.
- *
- * \see gd::Behavior
- * \see gd::BehaviorsSharedData
- * \see gd::Object
- * \ingroup PlatformDefinition
- */
-class GD_CORE_API BehaviorContent {
- public:
-  BehaviorContent(const gd::String& name_, const gd::String& type_)
-      : name(name_), type(type_){};
-  virtual ~BehaviorContent();
-  virtual BehaviorContent* Clone() const { return new BehaviorContent(*this); }
-
-  /**
-   * \brief Return the name identifying the behavior
-   */
-  virtual const gd::String& GetName() const { return name; }
-
-  /**
-   * \brief Change the name identifying the behavior
-   */
-  virtual void SetName(const gd::String& name_) { name = name_; }
-
-  /**
-   * \brief Get the type of the behavior.
-   */
-  virtual const gd::String& GetTypeName() const { return type; }
-
-  /**
-   * \brief Change the type of the behavior
-   */
-  virtual void SetTypeName(const gd::String& type_) { type = type_; }
-
-#if defined(GD_IDE_ONLY)
-  /**
-   * \brief Serialize the behavior content.
-   */
-  virtual void SerializeTo(gd::SerializerElement& element) const {
-    element = content;
-  };
-#endif
-
-  /**
-   * \brief Unserialize the behavior content.
-   */
-  virtual void UnserializeFrom(const gd::SerializerElement& element) {
-    content = element;
-  };
-
-  const gd::SerializerElement& GetContent() const { return content; };
-  gd::SerializerElement& GetContent() { return content; };
-
- protected:
-  gd::String name;  ///< Name of the behavior
-  gd::String type;  ///< The type of the behavior that is represented. Usually
-                    ///< in the form "ExtensionName::BehaviorTypeName"
-
-  gd::SerializerElement content;  // Storage for the behavior properties
-};
-
-}  // namespace gd
-
-#endif  // GDCORE_BEHAVIORCONTENT_H

Core/GDCore/Project/BehaviorsSharedData.cpp

@@ -5,21 +5,11 @@
  */
 
 #include "GDCore/Project/BehaviorsSharedData.h"
-#if defined(GD_IDE_ONLY)
 #include <map>
 #include "GDCore/Project/PropertyDescriptor.h"
-#endif
 
 namespace gd {
 
 BehaviorsSharedData::~BehaviorsSharedData(){};
 
-#if defined(GD_IDE_ONLY)
-std::map<gd::String, gd::PropertyDescriptor> BehaviorsSharedData::GetProperties(
-    const gd::SerializerElement& behaviorSharedDataContent) const {
-  std::map<gd::String, gd::PropertyDescriptor> nothing;
-  return nothing;
-}
-#endif
-
 }  // namespace gd

Core/GDCore/Project/BehaviorsSharedData.h

@@ -4,19 +4,11 @@
  * reserved. This project is released under the MIT License.
  */
 
-#ifndef BEHAVIORSSHAREDDATA_H
-#define BEHAVIORSSHAREDDATA_H
+#ifndef GDCORE_BEHAVIORSSHAREDDATA_H
+#define GDCORE_BEHAVIORSSHAREDDATA_H
 
-#include <map>
-#include <memory>
 #include "GDCore/String.h"
-class BehaviorsRuntimeSharedData;
-namespace gd {
-class SerializerElement;
-class PropertyDescriptor;
-class Project;
-class Layout;
-}  // namespace gd
+#include "GDCore/Project/BehaviorConfigurationContainer.h"
 
 namespace gd {
 
@@ -29,63 +21,15 @@ namespace gd {
  *
  * \ingroup GameEngine
  */
-class GD_CORE_API BehaviorsSharedData {
+class GD_CORE_API BehaviorsSharedData: public BehaviorConfigurationContainer {
  public:
-  BehaviorsSharedData(){};
+  BehaviorsSharedData(): BehaviorConfigurationContainer() {};
+  BehaviorsSharedData(const gd::String& name_, const gd::String& type_)
+      : BehaviorConfigurationContainer(name_, type_) {};
   virtual ~BehaviorsSharedData();
-  virtual gd::BehaviorsSharedData* Clone() const {
-    return new BehaviorsSharedData(*this);
-  }
-
-  /**
-   * \brief Return the name identifying the type of the behavior
-   */
-  gd::String GetTypeName() { return type; }
-
-  /**
-   * \brief Change name identifying the type of the behavior.
-   */
-  void SetTypeName(const gd::String& type_) { type = type_; };
-
-#if defined(GD_IDE_ONLY)
-  /**
-   * \brief Called when the IDE wants to know about the properties of the shared
-   data.
-   *
-   * Usage example:
-   \code
-      std::map<gd::String, gd::PropertyDescriptor> properties;
-      properties[_("Initial speed")].SetValue(gd::String::From(initialSpeed));
-
-      return properties;
-   \endcode
-   *
-   * \return a std::map with properties names as key.
-   * \see gd::PropertyDescriptor
-   */
-  virtual std::map<gd::String, gd::PropertyDescriptor> GetProperties(
-      const gd::SerializerElement& behaviorSharedDataContent) const;
-
-  /**
-   * \brief Called when the IDE wants to update a property of the shared data
-   *
-   * \return false if the new value cannot be set
-   * \see gd::InitialInstance
-   */
-  virtual bool UpdateProperty(gd::SerializerElement& behaviorSharedDataContent,
-                              const gd::String& name,
-                              const gd::String& value) {
-    return false;
-  };
-#endif
-
-  virtual void InitializeContent(
-      gd::SerializerElement& behaviorSharedDataContent){};
-
- private:
-  gd::String type;  ///< The type indicate of which type is the behavior.
+  virtual BehaviorsSharedData* Clone() const override { return new BehaviorsSharedData(*this); }
 };
 
 }  // namespace gd
 
-#endif  // BEHAVIORSSHAREDDATA_H
+#endif  // GDCORE_BEHAVIORSSHAREDDATA_H

Core/GDCore/Project/CustomBehavior.cpp

@@ -0,0 +1,119 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#include "CustomBehavior.h"
+
+#include "GDCore/IDE/Project/ArbitraryResourceWorker.h"
+#include "GDCore/Project/Behavior.h"
+#include "GDCore/Project/Project.h"
+#include "GDCore/Project/PropertyDescriptor.h"
+#include "GDCore/Serialization/Serializer.h"
+#include "GDCore/Serialization/SerializerElement.h"
+
+#include <map>
+
+using namespace gd;
+
+CustomBehavior *CustomBehavior::Clone() const {
+  CustomBehavior *clone = new CustomBehavior(*this);
+  return clone;
+}
+
+std::map<gd::String, gd::PropertyDescriptor> CustomBehavior::GetProperties(
+    const gd::SerializerElement &behaviorContent) const {
+  auto behaviorProperties = std::map<gd::String, gd::PropertyDescriptor>();
+  if (!project.HasEventsBasedBehavior(GetTypeName())) {
+    return behaviorProperties;
+  }
+  const auto &eventsBasedBehavior = project.GetEventsBasedBehavior(GetTypeName());
+  const auto &properties = eventsBasedBehavior.GetPropertyDescriptors();
+
+  for (auto &property : properties.GetInternalVector()) {
+    const auto &propertyName = property->GetName();
+    const auto &propertyType = property->GetType();
+
+    // TODO Move this into a PropertyDescriptor copy method.
+    auto &newProperty = behaviorProperties[propertyName]
+                            .SetType(property->GetType())
+                            .SetDescription(property->GetDescription())
+                            .SetGroup(property->GetGroup())
+                            .SetLabel(property->GetLabel())
+                            .SetValue(property->GetValue())
+                            .SetHidden(property->IsHidden());
+
+    for (auto &extraInfo : property->GetExtraInfo()) {
+      newProperty.AddExtraInfo(extraInfo);
+    }
+
+    if (behaviorContent.HasChild(propertyName)) {
+      if (propertyType == "String" || propertyType == "Choice" ||
+          propertyType == "Color" || propertyType == "Behavior") {
+        newProperty.SetValue(
+            behaviorContent.GetChild(propertyName).GetStringValue());
+      } else if (propertyType == "Number") {
+        newProperty.SetValue(gd::String::From(
+            behaviorContent.GetChild(propertyName).GetDoubleValue()));
+      } else if (propertyType == "Boolean") {
+        newProperty.SetValue(
+            behaviorContent.GetChild(propertyName).GetBoolValue() ? "true"
+                                                                  : "false");
+      }
+    } else {
+      // No value was serialized for this property. `newProperty`
+      // will have the default value coming from `enumeratedProperty`.
+    }
+  }
+
+  return behaviorProperties;
+}
+
+bool CustomBehavior::UpdateProperty(gd::SerializerElement &behaviorContent,
+                                    const gd::String &propertyName,
+                                    const gd::String &newValue) {
+  if (!project.HasEventsBasedBehavior(GetTypeName())) {
+    return false;
+  }
+  const auto &eventsBasedBehavior = project.GetEventsBasedBehavior(GetTypeName());
+  const auto &properties = eventsBasedBehavior.GetPropertyDescriptors();
+  if (!properties.Has(propertyName)) {
+    return false;
+  }
+  const auto &property = properties.Get(propertyName);
+
+  auto &element = behaviorContent.AddChild(propertyName);
+  const gd::String &propertyType = property.GetType();
+
+  if (propertyType == "String" || propertyType == "Choice" ||
+      propertyType == "Color" || propertyType == "Behavior") {
+    element.SetStringValue(newValue);
+  } else if (propertyType == "Number") {
+    element.SetDoubleValue(newValue.To<double>());
+  } else if (propertyType == "Boolean") {
+    element.SetBoolValue(newValue == "1");
+  }
+
+  return true;
+}
+
+void CustomBehavior::InitializeContent(gd::SerializerElement &behaviorContent) {
+  if (!project.HasEventsBasedBehavior(GetTypeName())) {
+    return;
+  }
+  const auto &eventsBasedBehavior = project.GetEventsBasedBehavior(GetTypeName());
+  const auto &properties = eventsBasedBehavior.GetPropertyDescriptors();
+  for (auto &&property : properties.GetInternalVector()) {
+    auto &element = behaviorContent.AddChild(property->GetName());
+    auto propertyType = property->GetType();
+
+    if (propertyType == "String" || propertyType == "Choice" ||
+        propertyType == "Color" || propertyType == "Behavior") {
+      element.SetStringValue(property->GetValue());
+    } else if (propertyType == "Number") {
+      element.SetDoubleValue(property->GetValue().To<double>());
+    } else if (propertyType == "Boolean") {
+      element.SetBoolValue(property->GetValue() == "true");
+    }
+  }
+}

Core/GDCore/Project/CustomBehavior.h

@@ -0,0 +1,51 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#ifndef GDCORE_CUSTOMBEHAVIOR_H
+#define GDCORE_CUSTOMBEHAVIOR_H
+
+#include "GDCore/Project/Behavior.h"
+#include "GDCore/Project/EventsBasedBehavior.h"
+#include "GDCore/Project/Project.h"
+#include "GDCore/Project/PropertyDescriptor.h"
+#include "GDCore/Serialization/Serializer.h"
+#include "GDCore/Serialization/SerializerElement.h"
+
+using namespace gd;
+
+namespace gd {
+/**
+ * \brief A gd::Behavior that stores its content in JSON and forward the
+ * properties related functions to Javascript with Emscripten.
+ */
+class CustomBehavior : public gd::Behavior {
+public:
+  CustomBehavior(const gd::String &name,
+                 const Project &project_,
+                 const gd::String &fullType)
+      : Behavior(name, fullType),
+        project(project_) {}
+  CustomBehavior *Clone() const override;
+
+  using Behavior::GetProperties;
+  using Behavior::InitializeContent;
+  using Behavior::UpdateProperty;
+
+protected:
+  virtual std::map<gd::String, gd::PropertyDescriptor>
+  GetProperties(const gd::SerializerElement &behaviorContent) const override;
+  virtual bool UpdateProperty(gd::SerializerElement &behaviorContent,
+                              const gd::String &name,
+                              const gd::String &value) override;
+  virtual void
+  InitializeContent(gd::SerializerElement &behaviorContent) override;
+
+private:
+  const Project &project; ///< The project is used to get the
+                          ///< EventBasedBehavior from the fullType.
+};
+}  // namespace gd
+
+#endif  // GDCORE_CUSTOMBEHAVIOR_H

Core/GDCore/Project/CustomObjectConfiguration.cpp

@@ -0,0 +1,228 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#include "CustomObjectConfiguration.h"
+
+#include "GDCore/IDE/Project/ArbitraryResourceWorker.h"
+#include "GDCore/Project/Object.h"
+#include "GDCore/Project/Project.h"
+#include "GDCore/Project/PropertyDescriptor.h"
+#include "GDCore/Serialization/Serializer.h"
+#include "GDCore/Serialization/SerializerElement.h"
+#include "GDCore/Tools/Log.h"
+
+using namespace gd;
+
+void CustomObjectConfiguration::Init(const gd::CustomObjectConfiguration& objectConfiguration) {
+  project = objectConfiguration.project;
+  objectContent = objectConfiguration.objectContent;
+
+  // There is no default copy for a map of unique_ptr like childObjectConfigurations.
+  childObjectConfigurations.clear();
+  for (auto& it : objectConfiguration.childObjectConfigurations) {
+    childObjectConfigurations[it.first] = it.second->Clone();
+  }
+}
+
+gd::ObjectConfiguration CustomObjectConfiguration::badObjectConfiguration;
+
+std::unique_ptr<gd::ObjectConfiguration> CustomObjectConfiguration::Clone() const {
+  return gd::make_unique<gd::CustomObjectConfiguration>(*this);
+}
+
+gd::ObjectConfiguration &CustomObjectConfiguration::GetChildObjectConfiguration(const gd::String &objectName) {
+  if (!project->HasEventsBasedObject(GetType())) {
+    return badObjectConfiguration;
+  }
+  const auto &eventsBasedObject = project->GetEventsBasedObject(GetType());
+  
+  if (!eventsBasedObject.HasObjectNamed(objectName)) {
+    gd::LogError("Tried to get the configuration of a child-object:" + objectName
+                + " that doesn't exist in the event-based object: " + GetType());
+    return badObjectConfiguration;
+  }
+
+  auto &childObject = eventsBasedObject.GetObject(objectName);
+  auto configurationPosition = childObjectConfigurations.find(objectName);
+  if (configurationPosition == childObjectConfigurations.end()) {
+    childObjectConfigurations.insert(std::make_pair(
+        objectName,
+        childObject.GetConfiguration().Clone()));
+    return *(childObjectConfigurations[objectName]);
+  }
+  else {
+    auto &pair = *configurationPosition;
+    auto &configuration = pair.second;
+    return *configuration;
+  }
+ }
+
+std::map<gd::String, gd::PropertyDescriptor> CustomObjectConfiguration::GetProperties() const {
+    auto objectProperties = std::map<gd::String, gd::PropertyDescriptor>();
+    if (!project->HasEventsBasedObject(GetType())) {
+      return objectProperties;
+    }
+    const auto &eventsBasedObject = project->GetEventsBasedObject(GetType());
+    const auto &properties = eventsBasedObject.GetPropertyDescriptors();
+
+    for (auto &property : properties.GetInternalVector()) {
+      const auto &propertyName = property->GetName();
+      const auto &propertyType = property->GetType();
+
+      // TODO Move this into a PropertyDescriptor copy method.
+      auto &newProperty = objectProperties[propertyName]
+            .SetType(property->GetType())
+            .SetDescription(property->GetDescription())
+            .SetGroup(property->GetGroup())
+            .SetLabel(property->GetLabel())
+            .SetValue(property->GetValue())
+            .SetHidden(property->IsHidden());
+      
+      for (auto &extraInfo : property->GetExtraInfo()) {
+        newProperty.AddExtraInfo(extraInfo);
+      }
+
+      if (objectContent.HasChild(propertyName)) {
+        if (
+          propertyType == "String" ||
+          propertyType == "Choice" ||
+          propertyType == "Color"
+        ) {
+          newProperty.SetValue(
+            objectContent.GetChild(propertyName).GetStringValue()
+          );
+        } else if (propertyType == "Number") {
+          newProperty.SetValue(
+            gd::String::From(objectContent.GetChild(propertyName).GetDoubleValue())
+          );
+        } else if (propertyType == "Boolean") {
+          newProperty.SetValue(
+            objectContent.GetChild(propertyName).GetBoolValue()
+              ? "true"
+              : "false"
+          );
+        }
+      } else {
+        // No value was serialized for this property. `newProperty`
+        // will have the default value coming from `enumeratedProperty`.
+      }
+    }
+
+    return objectProperties;
+}
+
+bool CustomObjectConfiguration::UpdateProperty(const gd::String& propertyName,
+                                  const gd::String& newValue) {
+    if (!project->HasEventsBasedObject(GetType())) {
+      return false;
+    }
+    const auto &eventsBasedObject = project->GetEventsBasedObject(GetType());
+    const auto &properties = eventsBasedObject.GetPropertyDescriptors();
+    if (!properties.Has(propertyName)) {
+      return false;
+    }
+    const auto &property = properties.Get(propertyName);
+
+    auto &element = objectContent.AddChild(propertyName);
+    const gd::String &propertyType = property.GetType();
+
+    if (
+      propertyType == "String" ||
+      propertyType == "Choice" ||
+      propertyType == "Color"
+    ) {
+      element.SetStringValue(newValue);
+    } else if (propertyType == "Number") {
+      element.SetDoubleValue(newValue.To<double>());
+    } else if (propertyType == "Boolean") {
+      element.SetBoolValue(newValue == "1");
+    }
+
+    return true;
+}
+
+std::map<gd::String, gd::PropertyDescriptor>
+CustomObjectConfiguration::GetInitialInstanceProperties(
+    const gd::InitialInstance& instance,
+    gd::Project& project,
+    gd::Layout& scene) {
+  return std::map<gd::String, gd::PropertyDescriptor>();
+}
+
+bool CustomObjectConfiguration::UpdateInitialInstanceProperty(
+    gd::InitialInstance& instance,
+    const gd::String& name,
+    const gd::String& value,
+    gd::Project& project,
+    gd::Layout& scene) {
+  return false;
+}
+
+void CustomObjectConfiguration::DoSerializeTo(SerializerElement& element) const {
+  element.AddChild("content") = objectContent;
+  auto &childrenContentElement = element.AddChild("childrenContent");
+  for (auto &pair : childObjectConfigurations) {
+    auto &childName = pair.first;
+    auto &childConfiguration = pair.second;
+    auto &childElement = childrenContentElement.AddChild(childName);
+    childConfiguration->SerializeTo(childElement);
+  }
+}
+void CustomObjectConfiguration::DoUnserializeFrom(Project& project,
+                                               const SerializerElement& element) {
+  objectContent = element.GetChild("content");
+  auto &childrenContentElement = element.GetChild("childrenContent");
+  for (auto &pair : childrenContentElement.GetAllChildren()) {
+    auto &childName = pair.first;
+    auto &childElement = pair.second;
+    auto &childConfiguration = GetChildObjectConfiguration(childName);
+    childConfiguration.UnserializeFrom(project, *childElement);
+  }
+}
+
+void CustomObjectConfiguration::ExposeResources(
+    gd::ArbitraryResourceWorker& worker) {
+  std::map<gd::String, gd::PropertyDescriptor> properties = GetProperties();
+
+  for (auto& property : properties) {
+    const String& propertyName = property.first;
+    const gd::PropertyDescriptor& propertyDescriptor = property.second;
+    if (propertyDescriptor.GetType() == "resource") {
+      auto& extraInfo = propertyDescriptor.GetExtraInfo();
+      const gd::String& resourceType = extraInfo.empty() ? "" : extraInfo[0];
+      const gd::String& oldPropertyValue = propertyDescriptor.GetValue();
+
+      gd::String newPropertyValue = oldPropertyValue;
+      if (resourceType == "image") {
+        worker.ExposeImage(newPropertyValue);
+      } else if (resourceType == "audio") {
+        worker.ExposeAudio(newPropertyValue);
+      } else if (resourceType == "font") {
+        worker.ExposeFont(newPropertyValue);
+      } else if (resourceType == "video") {
+        worker.ExposeVideo(newPropertyValue);
+      } else if (resourceType == "json") {
+        worker.ExposeJson(newPropertyValue);
+      } else if (resourceType == "bitmapFont") {
+        worker.ExposeBitmapFont(newPropertyValue);
+      }
+
+      if (newPropertyValue != oldPropertyValue) {
+        UpdateProperty(propertyName, newPropertyValue);
+      }
+    }
+  }
+
+  auto objectProperties = std::map<gd::String, gd::PropertyDescriptor>();
+  if (!project->HasEventsBasedObject(GetType())) {
+    return;
+  }
+  const auto &eventsBasedObject = project->GetEventsBasedObject(GetType());
+
+  for (auto& childObject : eventsBasedObject.GetObjects()) {
+    auto &configuration = GetChildObjectConfiguration(childObject->GetName());
+    configuration.ExposeResources(worker);
+  }
+}

Core/GDCore/Project/CustomObjectConfiguration.h

@@ -0,0 +1,100 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#ifndef GDCORE_CUSTOMOBJECTCONFIGURATION_H
+#define GDCORE_CUSTOMOBJECTCONFIGURATION_H
+
+#include "GDCore/Project/ObjectConfiguration.h"
+
+#include <map>
+#include <memory>
+#include "GDCore/Project/Object.h"
+#include "GDCore/Project/Project.h"
+#include "GDCore/Project/EventsBasedObject.h"
+#include "GDCore/Project/PropertyDescriptor.h"
+#include "GDCore/Serialization/Serializer.h"
+#include "GDCore/Serialization/SerializerElement.h"
+
+
+using namespace gd;
+
+namespace gd {
+/**
+ * \brief A gd::ObjectConfiguration that stores its content in JSON and is
+ * composed of other configuration according to it's object children.
+ *
+ * It also implements "ExposeResources" to expose the properties of type
+ * "resource".
+ */
+class CustomObjectConfiguration : public gd::ObjectConfiguration {
+ public:
+  CustomObjectConfiguration(const Project& project_, const String& type_)
+      : project(&project_) {
+    SetType(type_);
+  }
+  std::unique_ptr<gd::ObjectConfiguration> Clone() const override;
+
+  /**
+   * Copy constructor. Calls Init().
+   */
+  CustomObjectConfiguration(const gd::CustomObjectConfiguration& object)
+      : ObjectConfiguration(object) {
+    Init(object);
+  };
+
+  /**
+   * Assignment operator. Calls Init().
+   */
+  CustomObjectConfiguration& operator=(const gd::CustomObjectConfiguration& object){
+    if ((this) != &object) {
+        ObjectConfiguration::operator=(object);
+        Init(object);
+    }
+    return *this;
+  }
+
+  std::map<gd::String, gd::PropertyDescriptor> GetProperties() const override;
+  bool UpdateProperty(const gd::String& name, const gd::String& value) override;
+
+  std::map<gd::String, gd::PropertyDescriptor> GetInitialInstanceProperties(
+      const gd::InitialInstance& instance,
+      gd::Project& project,
+      gd::Layout& scene) override;
+  bool UpdateInitialInstanceProperty(gd::InitialInstance& instance,
+                                     const gd::String& name,
+                                     const gd::String& value,
+                                     gd::Project& project,
+                                     gd::Layout& scene) override;
+
+  void ExposeResources(gd::ArbitraryResourceWorker& worker) override;
+
+  gd::ObjectConfiguration &GetChildObjectConfiguration(const gd::String& objectName);
+
+ protected:
+  void DoSerializeTo(SerializerElement& element) const override;
+  void DoUnserializeFrom(Project& project, const SerializerElement& element) override;
+
+ private:
+  const Project* project; ///< The project is used to get the
+                          ///< EventBasedObject from the fullType.
+  gd::SerializerElement objectContent;
+  std::map<gd::String, std::unique_ptr<gd::ObjectConfiguration>> childObjectConfigurations;
+
+  static gd::ObjectConfiguration badObjectConfiguration;
+
+  /**
+   * Initialize configuration using another configuration. Used by copy-ctor
+   * and assign-op.
+   * 
+   * Don't forget to update me if members were changed!
+   * 
+   * It's needed because there is no default copy for childObjectConfigurations
+   * and it must be a deep copy.
+   */
+  void Init(const gd::CustomObjectConfiguration& object);
+};
+}  // namespace gd
+
+#endif  // GDCORE_CUSTOMOBJECTCONFIGURATION_H

Core/GDCore/Project/EffectsContainer.h

@@ -110,6 +110,11 @@ class GD_CORE_API EffectsContainer {
    */
   void UnserializeFrom(const SerializerElement& element);
 
+  /**
+   * \brief Clear all effects of the container.
+   */
+  inline void Clear() { effects.clear(); }
+
  private:
   std::vector<std::shared_ptr<gd::Effect>> effects;
   static Effect badEffect;

Core/GDCore/Project/EventsBasedBehavior.cpp

@@ -3,7 +3,6 @@
  * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
  * reserved. This project is released under the MIT License.
  */
-#if defined(GD_IDE_ONLY)
 #include "EventsBasedBehavior.h"
 #include "EventsFunctionsContainer.h"
 #include "GDCore/Serialization/SerializerElement.h"
@@ -12,36 +11,19 @@
 namespace gd {
 
 EventsBasedBehavior::EventsBasedBehavior()
-    : name("MyBehavior"), fullName("") {}
+    : AbstractEventsBasedEntity(
+        "MyBehavior",
+        gd::EventsFunctionsContainer::FunctionOwner::Behavior) {}
 
 void EventsBasedBehavior::SerializeTo(SerializerElement& element) const {
-  element.SetAttribute("description", description);
-  element.SetAttribute("name", name);
-  element.SetAttribute("fullName", fullName);
+  AbstractEventsBasedEntity::SerializeTo(element);
   element.SetAttribute("objectType", objectType);
-
-  gd::SerializerElement& eventsFunctionsElement =
-      element.AddChild("eventsFunctions");
-  eventsFunctionsContainer.SerializeEventsFunctionsTo(eventsFunctionsElement);
-  propertyDescriptors.SerializeElementsTo(
-      "propertyDescriptor", element.AddChild("propertyDescriptors"));
 }
 
 void EventsBasedBehavior::UnserializeFrom(gd::Project& project,
                                           const SerializerElement& element) {
-  description = element.GetStringAttribute("description");
-  name = element.GetStringAttribute("name");
-  fullName = element.GetStringAttribute("fullName");
+  AbstractEventsBasedEntity::UnserializeFrom(project, element);
   objectType = element.GetStringAttribute("objectType");
-
-  const gd::SerializerElement& eventsFunctionsElement =
-      element.GetChild("eventsFunctions");
-  eventsFunctionsContainer.UnserializeEventsFunctionsFrom(
-      project, eventsFunctionsElement);
-  propertyDescriptors.UnserializeElementsFrom(
-      "propertyDescriptor", element.GetChild("propertyDescriptors"));
 }
 
 }  // namespace gd
-
-#endif

Core/GDCore/Project/EventsBasedBehavior.h

@@ -3,11 +3,11 @@
  * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
  * reserved. This project is released under the MIT License.
  */
-#if defined(GD_IDE_ONLY)
 #ifndef GDCORE_EVENTSBASEDBEHAVIOR_H
 #define GDCORE_EVENTSBASEDBEHAVIOR_H
 
 #include <vector>
+#include "GDCore/Project/AbstractEventsBasedEntity.h"
 #include "GDCore/Project/NamedPropertyDescriptor.h"
 #include "GDCore/Tools/SerializableWithNameList.h"
 #include "GDCore/Project/EventsFunctionsContainer.h"
@@ -28,7 +28,7 @@ namespace gd {
  *
  * \ingroup PlatformDefinition
  */
-class GD_CORE_API EventsBasedBehavior {
+class GD_CORE_API EventsBasedBehavior: public AbstractEventsBasedEntity {
  public:
   EventsBasedBehavior();
   virtual ~EventsBasedBehavior(){};
@@ -39,43 +39,24 @@ class GD_CORE_API EventsBasedBehavior {
    */
   EventsBasedBehavior* Clone() const { return new EventsBasedBehavior(*this); };
 
-  /**
-   * \brief Get the description of the behavior, that is displayed in the
-   * editor.
-   */
-  const gd::String& GetDescription() const { return description; };
-
-  /**
-   * \brief Set the description of the behavior, to be displayed in the editor.
-   */
-  EventsBasedBehavior& SetDescription(const gd::String& description_) {
-    description = description_;
+  EventsBasedBehavior& SetDescription(const gd::String& description_) override {
+    AbstractEventsBasedEntity::SetDescription(description_);
     return *this;
   }
 
-  /**
-   * \brief Get the internal name of the behavior.
-   */
-  const gd::String& GetName() const { return name; };
-
   /**
    * \brief Set the internal name of the behavior.
    */
   EventsBasedBehavior& SetName(const gd::String& name_) {
-    name = name_;
+    AbstractEventsBasedEntity::SetName(name_);
     return *this;
   }
 
-  /**
-   * \brief Get the name of the behavior, that is displayed in the editor.
-   */
-  const gd::String& GetFullName() const { return fullName; };
-
   /**
    * \brief Set the name of the behavior, to be displayed in the editor.
    */
   EventsBasedBehavior& SetFullName(const gd::String& fullName_) {
-    fullName = fullName_;
+    AbstractEventsBasedEntity::SetFullName(fullName_);
     return *this;
   }
 
@@ -92,76 +73,15 @@ class GD_CORE_API EventsBasedBehavior {
     return *this;
   }
 
-  /**
-   * \brief Return a reference to the functions of the events based behavior.
-   */
-  EventsFunctionsContainer& GetEventsFunctions() {
-    return eventsFunctionsContainer;
-  }
+  void SerializeTo(SerializerElement& element) const override;
 
-  /**
-   * \brief Return a const reference to the functions of the events based
-   * behavior.
-   */
-  const EventsFunctionsContainer& GetEventsFunctions() const {
-    return eventsFunctionsContainer;
-  }
-
-  /**
-   * \brief Return a reference to the list of the properties.
-   */
-  SerializableWithNameList<NamedPropertyDescriptor>& GetPropertyDescriptors() {
-    return propertyDescriptors;
-  }
-
-  /**
-   * \brief Return a const reference to the list of the properties.
-   */
-  const SerializableWithNameList<NamedPropertyDescriptor>& GetPropertyDescriptors()
-      const {
-    return propertyDescriptors;
-  }
-
-  /**
-   * \brief Get the name of the action to change a property.
-   */
-  static gd::String GetPropertyActionName(const gd::String& propertyName) { return "SetProperty" + propertyName; };
-
-  /**
-   * \brief Get the name of the condition to compare a property.
-   */
-  static gd::String GetPropertyConditionName(const gd::String& propertyName) { return "Property" + propertyName; };
-
-  /**
-   * \brief Get the name of the expression to get a property.
-   */
-  static gd::String GetPropertyExpressionName(const gd::String& propertyName) { return "Property" + propertyName; };
-
-  /** \name Serialization
-   */
-  ///@{
-  /**
-   * \brief Serialize the EventsBasedBehavior to the specified element
-   */
-  void SerializeTo(gd::SerializerElement& element) const;
-
-  /**
-   * \brief Load the EventsBasedBehavior from the specified element
-   */
   void UnserializeFrom(gd::Project& project,
-                       const gd::SerializerElement& element);
-  ///@}
+                       const SerializerElement& element) override;
 
  private:
-  gd::String name;
-  gd::String fullName;
-  gd::String description;
   gd::String objectType;
-  gd::EventsFunctionsContainer eventsFunctionsContainer;
-  SerializableWithNameList<NamedPropertyDescriptor> propertyDescriptors;
 };
 
 }  // namespace gd
 
 #endif  // GDCORE_EVENTSBASEDBEHAVIOR_H
-#endif

Core/GDCore/Project/EventsBasedObject.cpp

@@ -0,0 +1,43 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#include "EventsBasedObject.h"
+#include "GDCore/Project/Object.h"
+#include "GDCore/Serialization/SerializerElement.h"
+
+namespace gd {
+
+EventsBasedObject::EventsBasedObject()
+    : AbstractEventsBasedEntity(
+        "MyObject",
+        gd::EventsFunctionsContainer::FunctionOwner::Object),
+    ObjectsContainer() {
+}
+
+EventsBasedObject::~EventsBasedObject() {}
+    
+EventsBasedObject::EventsBasedObject(const gd::EventsBasedObject &_eventBasedObject)
+        : AbstractEventsBasedEntity(_eventBasedObject) {
+  // TODO Add a copy constructor in ObjectsContainer.
+  initialObjects = gd::Clone(_eventBasedObject.initialObjects);
+  objectGroups = _eventBasedObject.objectGroups;
+}
+
+void EventsBasedObject::SerializeTo(SerializerElement& element) const {
+  element.SetAttribute("defaultName", defaultName);
+
+  AbstractEventsBasedEntity::SerializeTo(element);
+  SerializeObjectsTo(element.AddChild("objects"));
+}
+
+void EventsBasedObject::UnserializeFrom(gd::Project& project,
+                                          const SerializerElement& element) {
+  defaultName = element.GetStringAttribute("defaultName");
+
+  AbstractEventsBasedEntity::UnserializeFrom(project, element);
+  UnserializeObjectsFrom(project, element.GetChild("objects"));
+}
+
+}  // namespace gd

Core/GDCore/Project/EventsBasedObject.h

@@ -0,0 +1,86 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#ifndef GDCORE_EVENTSBASEDOBJECT_H
+#define GDCORE_EVENTSBASEDOBJECT_H
+
+#include <vector>
+#include "GDCore/Project/AbstractEventsBasedEntity.h"
+#include "GDCore/Project/ObjectsContainer.h"
+#include "GDCore/String.h"
+namespace gd {
+class SerializerElement;
+class Project;
+}  // namespace gd
+
+namespace gd {
+// TODO EBO Add a way to mark some parts of children configuration as readonly.
+/**
+ * \brief Represents an object that is implemented with events.
+ *
+ * It's the responsibility of the IDE to run the logic to transform this into a
+ * real object, by declaring an extension and running code generation.
+ * See `EventsFunctionsExtensionsLoader`.
+ *
+ * \ingroup PlatformDefinition
+ */
+class GD_CORE_API EventsBasedObject: public AbstractEventsBasedEntity, public ObjectsContainer {
+ public:
+  EventsBasedObject();
+  virtual ~EventsBasedObject();
+  EventsBasedObject(const gd::EventsBasedObject &_eventBasedObject);
+
+  /**
+   * \brief Return a pointer to a new EventsBasedObject constructed from
+   * this one.
+   */
+  EventsBasedObject* Clone() const { return new EventsBasedObject(*this); };
+
+  /**
+   * \brief Get the default name for created objects.
+   */
+  const gd::String& GetDefaultName() const { return defaultName; };
+
+  /**
+   * \brief Set the default name for created objects.
+   */
+  EventsBasedObject& SetDefaultName(const gd::String& defaultName_) {
+    defaultName = defaultName_;
+    return *this;
+  }
+
+  EventsBasedObject& SetDescription(const gd::String& description_) override {
+    AbstractEventsBasedEntity::SetDescription(description_);
+    return *this;
+  }
+
+  /**
+   * \brief Set the internal name of the object.
+   */
+  EventsBasedObject& SetName(const gd::String& name_) {
+    AbstractEventsBasedEntity::SetName(name_);
+    return *this;
+  }
+
+  /**
+   * \brief Set the name of the object, to be displayed in the editor.
+   */
+  EventsBasedObject& SetFullName(const gd::String& fullName_) {
+    AbstractEventsBasedEntity::SetFullName(fullName_);
+    return *this;
+  }
+
+  void SerializeTo(SerializerElement& element) const override;
+
+  void UnserializeFrom(gd::Project& project,
+                       const SerializerElement& element) override;
+
+ private:
+  gd::String defaultName;
+};
+
+}  // namespace gd
+
+#endif  // GDCORE_EVENTSBASEDOBJECT_H

Core/GDCore/Project/EventsFunction.cpp

@@ -7,10 +7,54 @@
 #include "EventsFunction.h"
 #include <vector>
 #include "GDCore/Serialization/SerializerElement.h"
+#include "GDCore/Project/EventsFunctionsContainer.h"
+#include "GDCore/Extensions/Metadata/ParameterMetadata.h"
 
 namespace gd {
 
-EventsFunction::EventsFunction() : functionType(Action) {}
+EventsFunction::EventsFunction() : functionType(Action) {
+  expressionType.SetName("expression");
+}
+
+const std::vector<gd::ParameterMetadata>& EventsFunction::GetParametersForEvents(
+    const gd::EventsFunctionsContainer& functionsContainer) const {
+  if (functionType != FunctionType::ActionWithOperator) {
+    // For most function types, the parameters are specified in the function.
+    return parameters;
+  }
+  // For ActionWithOperator, the parameters are auto generated.
+  actionWithOperationParameters.clear();
+  if (!functionsContainer.HasEventsFunctionNamed(getterName)) {
+    return actionWithOperationParameters;
+  }
+  const auto& expression = functionsContainer.GetEventsFunction(getterName);
+  const auto& expressionParameters = expression.parameters;
+  const auto functionsSource = functionsContainer.GetOwner();
+  const int expressionValueParameterIndex =
+      functionsSource == gd::EventsFunctionsContainer::FunctionOwner::Behavior ?
+      2 : 
+      functionsSource == gd::EventsFunctionsContainer::FunctionOwner::Object ?
+      1 :
+      0;
+  
+  for (size_t i = 0;
+       i < expressionValueParameterIndex && i < expressionParameters.size();
+       i++)
+  {
+    actionWithOperationParameters.push_back(expressionParameters[i]);
+  }
+  gd::ParameterMetadata parameterMetadata;
+  parameterMetadata.SetName("Value").SetValueTypeMetadata(expression.expressionType);
+  actionWithOperationParameters.push_back(parameterMetadata);
+  for (size_t i = expressionValueParameterIndex;
+       i < expressionParameters.size();
+       i++)
+  {
+    actionWithOperationParameters.push_back(expressionParameters[i]);
+  }
+
+  return actionWithOperationParameters;
+}
 
 void EventsFunction::SerializeTo(SerializerElement& element) const {
   element.SetAttribute("name", name);
@@ -18,18 +62,33 @@ void EventsFunction::SerializeTo(SerializerElement& element) const {
   element.SetAttribute("description", description);
   element.SetAttribute("sentence", sentence);
   element.SetAttribute("group", group);
+  element.SetAttribute("getterName", getterName);
   element.SetBoolAttribute("private", isPrivate);
   events.SerializeTo(element.AddChild("events"));
 
   gd::String functionTypeStr = "Action";
   if (functionType == Condition)
     functionTypeStr = "Condition";
-  else if (functionType == Expression)
+  else if (functionType == Expression) {
     functionTypeStr = "Expression";
-  else if (functionType == StringExpression)
-    functionTypeStr = "StringExpression";
+
+    // Compatibility code for version 5.1.147 and older.
+    // There is no longer distinction between number and string in the function
+    // type directly. The expression type is now used for this.
+    if (expressionType.IsString()) {
+      functionTypeStr = "StringExpression";
+    }
+  }
+  else if (functionType == ExpressionAndCondition) {
+    functionTypeStr = "ExpressionAndCondition";
+  }
+  else if (functionType == ActionWithOperator)
+    functionTypeStr = "ActionWithOperator";
   element.SetAttribute("functionType", functionTypeStr);
 
+  if (this->IsExpression()) {
+    expressionType.SerializeTo(element.AddChild("expressionType"));
+  }
   gd::SerializerElement& parametersElement = element.AddChild("parameters");
   parametersElement.ConsiderAsArrayOf("parameter");
   for (const auto& parameter : parameters) {
@@ -46,16 +105,32 @@ void EventsFunction::UnserializeFrom(gd::Project& project,
   description = element.GetStringAttribute("description");
   sentence = element.GetStringAttribute("sentence");
   group = element.GetStringAttribute("group");
+  getterName = element.GetStringAttribute("getterName");
   isPrivate = element.GetBoolAttribute("private");
   events.UnserializeFrom(project, element.GetChild("events"));
 
   gd::String functionTypeStr = element.GetStringAttribute("functionType");
+
   if (functionTypeStr == "Condition")
     functionType = Condition;
-  else if (functionTypeStr == "Expression")
+  else if (functionTypeStr == "Expression" || functionTypeStr == "StringExpression") {
     functionType = Expression;
-  else if (functionTypeStr == "StringExpression")
-    functionType = StringExpression;
+    if (element.HasChild("expressionType")) {
+      expressionType.UnserializeFrom(element.GetChild("expressionType"));
+    }
+    else {
+      // Compatibility code for version 5.1.147 and older.
+      // There is no longer distinction between number and string in the function
+      // type directly. The expression type is now used for this.
+      expressionType.SetName(functionTypeStr == "StringExpression" ? "string" : "expression");
+    }
+  }
+  else if (functionTypeStr == "ExpressionAndCondition") {
+    functionType = ExpressionAndCondition;
+    expressionType.UnserializeFrom(element.GetChild("expressionType"));
+  }
+  else if (functionTypeStr == "ActionWithOperator")
+    functionType = ActionWithOperator;
   else
     functionType = Action;
 

Core/GDCore/Project/EventsFunction.h

@@ -12,6 +12,7 @@
 #include "GDCore/Events/EventsList.h"
 #include "GDCore/Project/ObjectGroupsContainer.h"
 #include "GDCore/String.h"
+#include "GDCore/Extensions/Metadata/ValueTypeMetadata.h"
 // TODO: In theory (for separation of concerns between Project and
 // extensions/events), this include should be removed and gd::ParameterMetadata
 // replaced by a new gd::EventsFunctionParameter class.
@@ -19,6 +20,7 @@
 namespace gd {
 class SerializerElement;
 class Project;
+class EventsFunctionsContainer;
 }  // namespace gd
 
 namespace gd {
@@ -115,7 +117,40 @@ class GD_CORE_API EventsFunction {
     return *this;
   }
 
-  enum FunctionType { Action, Condition, Expression, StringExpression };
+  /**
+   * \brief Get the name of the ExpressionAndCondition to use as an operand
+   * that is defined in the editor.
+   */
+  const gd::String& GetGetterName() const { return getterName; };
+
+  /**
+   * \brief Set the name of the ExpressionAndCondition to use as an operand
+   * that is defined in the editor.
+   */
+  EventsFunction& SetGetterName(const gd::String& getterName_) {
+    getterName = getterName_;
+    return *this;
+  }
+
+  /**
+   * \brief Set the type of the expression
+   */
+  EventsFunction& SetExpressionType(const gd::ValueTypeMetadata& type) {
+    expressionType = type;
+    return *this;
+  }
+
+  /**
+   * \brief Get the type of the expression
+   */
+  const gd::ValueTypeMetadata& GetExpressionType() const { return expressionType; }
+
+  enum FunctionType {
+      Action,
+      Condition,
+      Expression,
+      ExpressionAndCondition,
+      ActionWithOperator };
 
   /**
    * \brief Set the type of the function
@@ -123,12 +158,40 @@ class GD_CORE_API EventsFunction {
   EventsFunction& SetFunctionType(FunctionType type) {
     functionType = type;
     return *this;
-  };
+  }
 
   /**
    * \brief Get the type of the function
    */
-  FunctionType GetFunctionType() const { return functionType; };
+  FunctionType GetFunctionType() const { return functionType; }
+
+  /**
+   * \brief Return true if the function is an action.
+   */
+  bool IsAction() const {
+    return functionType == gd::EventsFunction::Action || 
+           functionType == gd::EventsFunction::ActionWithOperator;
+ }
+
+  /**
+   * \brief Return true if the function is an expression.
+   * 
+   * Note that a function can be both an expression and a condition.
+   */
+  bool IsExpression() const {
+    return functionType == gd::EventsFunction::Expression ||
+           functionType == gd::EventsFunction::ExpressionAndCondition;
+ }
+
+  /**
+   * \brief Return true if the function is a condition.
+   * 
+   * Note that a function can be both an expression and a condition.
+   */
+  bool IsCondition() const {
+    return functionType == gd::EventsFunction::Condition ||
+           functionType == gd::EventsFunction::ExpressionAndCondition;
+ }
 
   /**
    * \brief Returns true if the function is private.
@@ -154,7 +217,20 @@ class GD_CORE_API EventsFunction {
   gd::EventsList& GetEvents() { return events; };
 
   /**
-   * \brief Return the parameters of the function.
+   * \brief Return the parameters of the function that are used in the events.
+   *
+   * \note During code/extension generation, new parameters are added
+   * to the generated function, like "runtimeScene" and "eventsFunctionContext".
+   * This should be transparent to the user.
+   */
+  const std::vector<gd::ParameterMetadata>& GetParametersForEvents(
+      const gd::EventsFunctionsContainer& functionsContainer) const;
+
+  /**
+   * \brief Return the parameters of the function that are filled in the editor.
+   * 
+   * \note They won't be used for ActionWithOperator, but they need to be kept
+   * to avoid to loose them when the function type is changed.
    *
    * \note During code/extension generation, new parameters are added
    * to the generated function, like "runtimeScene" and "eventsFunctionContext".
@@ -202,9 +278,12 @@ class GD_CORE_API EventsFunction {
   gd::String description;
   gd::String sentence;
   gd::String group;
+  gd::String getterName;
+  gd::ValueTypeMetadata expressionType;
   gd::EventsList events;
   FunctionType functionType;
   std::vector<gd::ParameterMetadata> parameters;
+  mutable std::vector<gd::ParameterMetadata> actionWithOperationParameters;
   gd::ObjectGroupsContainer objectGroups;
   bool isPrivate = false;
 };

Core/GDCore/Project/EventsFunctionsContainer.h

@@ -25,7 +25,24 @@ namespace gd {
  */
 class GD_CORE_API EventsFunctionsContainer
     : private SerializableWithNameList<gd::EventsFunction> {
- public:
+public:
+  enum FunctionOwner {
+      Extension,
+      Object,
+      Behavior};
+
+  EventsFunctionsContainer(FunctionOwner source_) : owner(source_) {}
+
+  /**
+   * \brief Get the source of the function container.
+   * 
+   * \note For instance, it can be useful to handle specific parameters for
+   * behaviors.
+   */
+  FunctionOwner GetOwner() const {
+    return owner;
+  }
+
   /** \name Events Functions management
    */
   ///@{
@@ -139,6 +156,9 @@ class GD_CORE_API EventsFunctionsContainer
   void Init(const gd::EventsFunctionsContainer& other) {
     return SerializableWithNameList<gd::EventsFunction>::Init(other);
   };
+
+private:
+  FunctionOwner owner;
 };
 
 }  // namespace gd

Core/GDCore/Project/EventsFunctionsExtension.cpp

@@ -6,16 +6,21 @@
 #include "EventsFunctionsExtension.h"
 
 #include "EventsBasedBehavior.h"
+#include "EventsBasedObject.h"
 #include "EventsFunction.h"
 #include "GDCore/Serialization/SerializerElement.h"
 #include "GDCore/Tools/MakeUnique.h"
 
 namespace gd {
 
-EventsFunctionsExtension::EventsFunctionsExtension() {}
+EventsFunctionsExtension::EventsFunctionsExtension() :
+    gd::EventsFunctionsContainer(
+        gd::EventsFunctionsContainer::FunctionOwner::Extension) {}
 
 EventsFunctionsExtension::EventsFunctionsExtension(
-    const EventsFunctionsExtension& other) {
+    const EventsFunctionsExtension& other) :
+    gd::EventsFunctionsContainer(
+        gd::EventsFunctionsContainer::FunctionOwner::Extension) {
   Init(other);
 }
 
@@ -42,6 +47,7 @@ void EventsFunctionsExtension::Init(const gd::EventsFunctionsExtension& other) {
   helpPath = other.helpPath;
   EventsFunctionsContainer::Init(other);
   eventsBasedBehaviors = other.eventsBasedBehaviors;
+  eventsBasedObjects = other.eventsBasedObjects;
 }
 
 void EventsFunctionsExtension::SerializeTo(SerializerElement& element) const {
@@ -79,9 +85,17 @@ void EventsFunctionsExtension::SerializeTo(SerializerElement& element) const {
   SerializeEventsFunctionsTo(element.AddChild("eventsFunctions"));
   eventsBasedBehaviors.SerializeElementsTo(
       "eventsBasedBehavior", element.AddChild("eventsBasedBehaviors"));
+  eventsBasedObjects.SerializeElementsTo(
+      "eventsBasedObject", element.AddChild("eventsBasedObjects"));
 }
 
 void EventsFunctionsExtension::UnserializeFrom(
+    gd::Project& project, const SerializerElement& element) {
+      UnserializeExtensionDeclarationFrom(project, element);
+      UnserializeExtensionImplementationFrom(project, element);
+}
+
+void EventsFunctionsExtension::UnserializeExtensionDeclarationFrom(
     gd::Project& project, const SerializerElement& element) {
   version = element.GetStringAttribute("version");
   extensionNamespace = element.GetStringAttribute("extensionNamespace");
@@ -134,9 +148,34 @@ void EventsFunctionsExtension::UnserializeFrom(
     dependencies.push_back(
         UnserializeDependencyFrom(dependenciesElement.GetChild(i)));
 
+  // Only unserialize behaviors and objects names.
+  // As event based objects can contains objects using CustomBehavior and/or
+  // CustomObject, this allows them to reference EventBasedBehavior and
+  // EventBasedObject respectively.
+  auto &behaviorsElement = element.GetChild("eventsBasedBehaviors");
+  behaviorsElement.ConsiderAsArrayOf("eventsBasedBehavior");
+  for (std::size_t i = 0; i < behaviorsElement.GetChildrenCount(); ++i) {
+    const gd::String &behaviorName =
+        behaviorsElement.GetChild(i).GetStringAttribute("name");
+    eventsBasedBehaviors.InsertNew(behaviorName, eventsBasedBehaviors.GetCount());
+  }
+  auto &objectsElement = element.GetChild("eventsBasedObjects");
+  objectsElement.ConsiderAsArrayOf("eventsBasedObject");
+  for (std::size_t i = 0; i < objectsElement.GetChildrenCount(); ++i) {
+    const gd::String &objectName =
+        objectsElement.GetChild(i).GetStringAttribute("name");
+    eventsBasedObjects.InsertNew(objectName, eventsBasedObjects.GetCount());
+  }
+}
+
+void EventsFunctionsExtension::UnserializeExtensionImplementationFrom(
+    gd::Project& project,
+    const SerializerElement& element) {
   UnserializeEventsFunctionsFrom(project, element.GetChild("eventsFunctions"));
   eventsBasedBehaviors.UnserializeElementsFrom(
       "eventsBasedBehavior", project, element.GetChild("eventsBasedBehaviors"));
+  eventsBasedObjects.UnserializeElementsFrom(
+      "eventsBasedObject", project, element.GetChild("eventsBasedObjects"));
 }
 
 bool EventsFunctionsExtension::IsExtensionLifecycleEventsFunction(

Core/GDCore/Project/EventsFunctionsExtension.h

@@ -10,6 +10,7 @@
 
 #include "GDCore/Extensions/Metadata/DependencyMetadata.h"
 #include "GDCore/Project/EventsBasedBehavior.h"
+#include "GDCore/Project/EventsBasedObject.h"
 #include "GDCore/Project/EventsFunctionsContainer.h"
 #include "GDCore/String.h"
 #include "GDCore/Tools/SerializableWithNameList.h"
@@ -19,7 +20,9 @@ class Project;
 }  // namespace gd
 
 namespace gd {
-
+// TODO Remove the EventsFunctionsContainer inheritance and make it an attribute.
+// This will allow to get EventsFunctionsContainer the same way for extensions,
+// objects and behaviors.
 /**
  * \brief Hold a list of Events Functions (gd::EventsFunction) and Events Based
  * Behaviors.
@@ -145,6 +148,21 @@ class GD_CORE_API EventsFunctionsExtension : public EventsFunctionsContainer {
     return eventsBasedBehaviors;
   }
 
+  /**
+   * \brief Return a reference to the list of the events based objects.
+   */
+  gd::SerializableWithNameList<EventsBasedObject>& GetEventsBasedObjects() {
+    return eventsBasedObjects;
+  }
+
+  /**
+   * \brief Return a const reference to the list of the events based objects.
+   */
+  const gd::SerializableWithNameList<EventsBasedObject>&
+  GetEventsBasedObjects() const {
+    return eventsBasedObjects;
+  }
+
   /**
    * \brief Sets an extension origin. This method is not present since the
    * beginning so the projects created before that will have extensions
@@ -200,10 +218,26 @@ class GD_CORE_API EventsFunctionsExtension : public EventsFunctionsContainer {
   void SerializeTo(gd::SerializerElement& element) const;
 
   /**
-   * \brief Load the EventsFunctionsExtension from the specified element
+   * \brief Load the EventsFunctionsExtension from the specified element.
    */
   void UnserializeFrom(gd::Project& project,
                        const gd::SerializerElement& element);
+
+  /**
+   * \brief Load the extension without free functions, behaviors and objects
+   * implementation.
+   */
+  void UnserializeExtensionDeclarationFrom(
+      gd::Project& project,
+      const gd::SerializerElement& element);
+
+  /**
+   * \brief Load free functions, behaviors and objects implementation
+   * (in opposition to load just their "declaration" by reading their name).
+   */
+  void UnserializeExtensionImplementationFrom(
+      gd::Project& project,
+      const gd::SerializerElement& element);
   ///@}
 
   /** \name Lifecycle event functions
@@ -255,6 +289,7 @@ class GD_CORE_API EventsFunctionsExtension : public EventsFunctionsContainer {
   gd::String helpPath;  ///< The relative path to the help for this extension in
                         ///< the documentation (or an absolute URL).
   gd::SerializableWithNameList<EventsBasedBehavior> eventsBasedBehaviors;
+  gd::SerializableWithNameList<EventsBasedObject> eventsBasedObjects;
   std::vector<gd::DependencyMetadata> dependencies;
 };
 

Core/GDCore/Project/InitialInstance.cpp

@@ -11,9 +11,7 @@
 #include "GDCore/Project/Project.h"
 #include "GDCore/Serialization/SerializerElement.h"
 #include "GDCore/Tools/UUID/UUID.h"
-#if defined(GD_IDE_ONLY)
 #include "GDCore/Project/PropertyDescriptor.h"
-#endif
 
 namespace gd {
 
@@ -30,6 +28,7 @@ InitialInstance::InitialInstance()
       width(0),
       height(0),
       locked(false),
+      sealed(false),
       persistentUuid(UUID::MakeUuid4()) {}
 
 void InitialInstance::UnserializeFrom(const SerializerElement& element) {
@@ -44,6 +43,7 @@ void InitialInstance::UnserializeFrom(const SerializerElement& element) {
   SetZOrder(element.GetIntAttribute("zOrder", 0, "plan"));
   SetLayer(element.GetStringAttribute("layer"));
   SetLocked(element.GetBoolAttribute("locked", false));
+  SetSealed(element.GetBoolAttribute("sealed", false));
 
   persistentUuid = element.GetStringAttribute("persistentUuid");
   if (persistentUuid.empty()) ResetPersistentUuid();
@@ -83,7 +83,8 @@ void InitialInstance::SerializeTo(SerializerElement& element) const {
   element.SetAttribute("customSize", HasCustomSize());
   element.SetAttribute("width", GetCustomWidth());
   element.SetAttribute("height", GetCustomHeight());
-  element.SetAttribute("locked", IsLocked());
+  if (IsLocked()) element.SetAttribute("locked", IsLocked());
+  if (IsSealed()) element.SetAttribute("sealed", IsSealed());
 
   if (persistentUuid.empty()) persistentUuid = UUID::MakeUuid4();
   element.SetStringAttribute("persistentUuid", persistentUuid);
@@ -112,15 +113,14 @@ InitialInstance& InitialInstance::ResetPersistentUuid() {
   return *this;
 }
 
-#if defined(GD_IDE_ONLY)
 std::map<gd::String, gd::PropertyDescriptor>
 InitialInstance::GetCustomProperties(gd::Project& project, gd::Layout& layout) {
   // Find an object
   if (layout.HasObjectNamed(GetObjectName()))
-    return layout.GetObject(GetObjectName())
+    return layout.GetObject(GetObjectName()).GetConfiguration()
         .GetInitialInstanceProperties(*this, project, layout);
   else if (project.HasObjectNamed(GetObjectName()))
-    return project.GetObject(GetObjectName())
+    return project.GetObject(GetObjectName()).GetConfiguration()
         .GetInitialInstanceProperties(*this, project, layout);
 
   std::map<gd::String, gd::PropertyDescriptor> nothing;
@@ -132,15 +132,14 @@ bool InitialInstance::UpdateCustomProperty(const gd::String& name,
                                            gd::Project& project,
                                            gd::Layout& layout) {
   if (layout.HasObjectNamed(GetObjectName()))
-    return layout.GetObject(GetObjectName())
+    return layout.GetObject(GetObjectName()).GetConfiguration()
         .UpdateInitialInstanceProperty(*this, name, value, project, layout);
   else if (project.HasObjectNamed(GetObjectName()))
-    return project.GetObject(GetObjectName())
+    return project.GetObject(GetObjectName()).GetConfiguration()
         .UpdateInitialInstanceProperty(*this, name, value, project, layout);
 
   return false;
 }
-#endif
 
 double InitialInstance::GetRawDoubleProperty(const gd::String& name) const {
   const auto& it = numberProperties.find(name);

Core/GDCore/Project/InitialInstance.h

@@ -127,19 +127,31 @@ class GD_CORE_API InitialInstance {
   void SetCustomHeight(double height_) { height = height_; }
 
   /**
-   * \brief Return true if the instance is locked and cannot be selected by
-   * clicking on it in the IDE.
+   * \brief Return true if the instance is locked and cannot be moved in the IDE.
    */
   bool IsLocked() const { return locked; };
 
   /**
    * \brief (Un)lock the initial instance.
    *
-   * An instance which is locked cannot be selected by clicking on it in a
-   * layout editor canvas.
+   * An instance which is locked cannot be moved with actions in the IDE.
    */
   void SetLocked(bool enable = true) { locked = enable; }
 
+  /**
+   * \brief Return true if the instance cannot be selected by clicking on it
+   * in the IDE (only applies if instance is also locked).
+   */
+  bool IsSealed() const { return sealed; };
+
+  /**
+   * \brief (Un)seal the initial instance.
+   *
+   * An instance which is sealed cannot be selected by clicking on it in a
+   * layout editor canvas.
+   */
+  void SetSealed(bool enable = true) { sealed = enable; }
+
   ///@}
 
   /** \name Variable management
@@ -270,6 +282,7 @@ class GD_CORE_API InitialInstance {
   double height;           ///< Object custom height
   gd::VariablesContainer initialVariables;  ///< Instance specific variables
   bool locked;                              ///< True if the instance is locked
+  bool sealed;                              ///< True if the instance is sealed
   mutable gd::String persistentUuid; ///< A persistent random version 4 UUID, useful for hot reloading.
 
   static gd::String*

Core/GDCore/Project/InitialInstancesContainer.h

@@ -244,6 +244,15 @@ class GD_CORE_API HighestZOrderFinder : public gd::InitialInstanceFunctor {
    */
   size_t GetInstancesCount() const { return instancesCount; }
 
+  void Reset() {
+    highestZOrder = 0;
+    lowestZOrder = 0;
+    instancesCount = 0;
+    firstCall = true;
+    layerRestricted = false;
+    layerName.clear();
+  }
+
  private:
   int highestZOrder;
   int lowestZOrder;

Core/GDCore/Project/Layout.cpp

@@ -16,7 +16,6 @@
 #include "GDCore/Extensions/Platform.h"
 #include "GDCore/IDE/SceneNameMangler.h"
 #include "GDCore/Project/Behavior.h"
-#include "GDCore/Project/BehaviorContent.h"
 #include "GDCore/Project/BehaviorsSharedData.h"
 #include "GDCore/Project/InitialInstance.h"
 #include "GDCore/Project/Layer.h"
@@ -33,7 +32,7 @@ using namespace std;
 namespace gd {
 
 gd::Layer Layout::badLayer;
-gd::BehaviorContent Layout::badBehaviorContent("", "");
+gd::BehaviorsSharedData Layout::badBehaviorSharedData("", "");
 
 Layout::Layout(const Layout& other) { Init(other); }
 
@@ -51,9 +50,6 @@ Layout::Layout()
       backgroundColorB(209),
       stopSoundsOnStartup(true),
       standardSortMethod(true),
-      oglFOV(90.0f),
-      oglZNear(1.0f),
-      oglZFar(500.0f),
       disableInputWhenNotFocused(true),
       profiler(NULL)
 {
@@ -79,23 +75,23 @@ std::vector<gd::String> Layout::GetAllBehaviorSharedDataNames() const {
   return allNames;
 }
 
-const gd::BehaviorContent& Layout::GetBehaviorSharedData(
+const gd::BehaviorsSharedData& Layout::GetBehaviorSharedData(
     const gd::String& behaviorName) const {
   auto it = behaviorsSharedData.find(behaviorName);
   if (it != behaviorsSharedData.end()) return *it->second;
 
-  return badBehaviorContent;
+  return badBehaviorSharedData;
 }
 
-gd::BehaviorContent& Layout::GetBehaviorSharedData(
+gd::BehaviorsSharedData& Layout::GetBehaviorSharedData(
     const gd::String& behaviorName) {
   auto it = behaviorsSharedData.find(behaviorName);
   if (it != behaviorsSharedData.end()) return *it->second;
 
-  return badBehaviorContent;
+  return badBehaviorSharedData;
 }
 
-const std::map<gd::String, std::unique_ptr<gd::BehaviorContent> >&
+const std::map<gd::String, std::unique_ptr<gd::BehaviorsSharedData> >&
 Layout::GetAllBehaviorSharedData() const {
   return behaviorsSharedData;
 }
@@ -197,20 +193,20 @@ void Layout::UpdateBehaviorsSharedData(gd::Project& project) {
     std::vector<gd::String> objectBehaviors =
         initialObjects[i]->GetAllBehaviorNames();
     for (unsigned int j = 0; j < objectBehaviors.size(); ++j) {
-      auto& behaviorContent =
+      auto& behavior =
           initialObjects[i]->GetBehavior(objectBehaviors[j]);
-      allBehaviorsTypes.push_back(behaviorContent.GetTypeName());
-      allBehaviorsNames.push_back(behaviorContent.GetName());
+      allBehaviorsTypes.push_back(behavior.GetTypeName());
+      allBehaviorsNames.push_back(behavior.GetName());
     }
   }
   for (std::size_t i = 0; i < project.GetObjectsCount(); ++i) {
     std::vector<gd::String> objectBehaviors =
         project.GetObject(i).GetAllBehaviorNames();
     for (std::size_t j = 0; j < objectBehaviors.size(); ++j) {
-      auto& behaviorContent =
+      auto& behavior =
           project.GetObject(i).GetBehavior(objectBehaviors[j]);
-      allBehaviorsTypes.push_back(behaviorContent.GetTypeName());
-      allBehaviorsNames.push_back(behaviorContent.GetName());
+      allBehaviorsTypes.push_back(behavior.GetTypeName());
+      allBehaviorsNames.push_back(behavior.GetName());
     }
   }
 
@@ -222,19 +218,10 @@ void Layout::UpdateBehaviorsSharedData(gd::Project& project) {
 
     if (behaviorsSharedData.find(name) != behaviorsSharedData.end()) continue;
 
-    const gd::BehaviorMetadata& behaviorMetadata =
-        gd::MetadataProvider::GetBehaviorMetadata(project.GetCurrentPlatform(),
-                                                  allBehaviorsTypes[i]);
-    if (gd::MetadataProvider::IsBadBehaviorMetadata(behaviorMetadata)) continue;
-
-    gd::BehaviorsSharedData* behaviorSharedData =
-        behaviorMetadata.GetSharedDataInstance();
-    if (!behaviorSharedData) continue;
-
-    auto behaviorContent =
-        gd::make_unique<gd::BehaviorContent>(name, allBehaviorsTypes[i]);
-    behaviorSharedData->InitializeContent(behaviorContent->GetContent());
-    behaviorsSharedData[name] = std::move(behaviorContent);
+    auto sharedData = CreateBehaviorsSharedData(project, name, allBehaviorsTypes[i]);
+    if (sharedData) {
+      behaviorsSharedData[name] = std::move(sharedData);
+    }
   }
 
   // Remove useless shared data:
@@ -253,6 +240,33 @@ void Layout::UpdateBehaviorsSharedData(gd::Project& project) {
   }
 }
 
+std::unique_ptr<gd::BehaviorsSharedData> Layout::CreateBehaviorsSharedData(gd::Project& project, const gd::String& name, const gd::String& behaviorsType) {
+    if (project.HasEventsBasedBehavior(behaviorsType)) {
+      // Events based behaviors don't have shared data yet.
+      auto sharedData =
+          gd::make_unique<gd::BehaviorsSharedData>(name, behaviorsType);
+      sharedData->InitializeContent();
+      return std::move(sharedData);
+    }
+    const gd::BehaviorMetadata& behaviorMetadata =
+        gd::MetadataProvider::GetBehaviorMetadata(
+            project.GetCurrentPlatform(),
+            behaviorsType);
+    if (gd::MetadataProvider::IsBadBehaviorMetadata(behaviorMetadata)) {
+      return nullptr;
+    }
+
+    gd::BehaviorsSharedData* behaviorsSharedDataBluePrint =
+        behaviorMetadata.GetSharedDataInstance();
+    if (!behaviorsSharedDataBluePrint) return nullptr;
+
+    auto sharedData = behaviorsSharedDataBluePrint->Clone();
+    sharedData->SetName(name);
+    sharedData->SetTypeName(behaviorsType);
+    sharedData->InitializeContent();
+    return std::unique_ptr<gd::BehaviorsSharedData>(sharedData);
+}
+
 void Layout::SerializeTo(SerializerElement& element) const {
   element.SetAttribute("name", GetName());
   element.SetAttribute("mangledName", GetMangledName());
@@ -260,17 +274,12 @@ void Layout::SerializeTo(SerializerElement& element) const {
   element.SetAttribute("v", (int)GetBackgroundColorGreen());
   element.SetAttribute("b", (int)GetBackgroundColorBlue());
   element.SetAttribute("title", GetWindowDefaultTitle());
-  element.SetAttribute("oglFOV", oglFOV);
-  element.SetAttribute("oglZNear", oglZNear);
-  element.SetAttribute("oglZFar", oglZFar);
   element.SetAttribute("standardSortMethod", standardSortMethod);
   element.SetAttribute("stopSoundsOnStartup", stopSoundsOnStartup);
   element.SetAttribute("disableInputWhenNotFocused",
                        disableInputWhenNotFocused);
 
-#if defined(GD_IDE_ONLY)
   editorSettings.SerializeTo(element.AddChild("uiSettings"));
-#endif
 
   GetObjectGroups().SerializeTo(element.AddChild("objectsGroups"));
   GetVariables().SerializeTo(element.AddChild("variables"));
@@ -321,9 +330,6 @@ void Layout::UnserializeFrom(gd::Project& project,
                      element.GetIntAttribute("b"));
   SetWindowDefaultTitle(
       element.GetStringAttribute("title", "(No title)", "titre"));
-  oglFOV = element.GetDoubleAttribute("oglFOV");
-  oglZNear = element.GetDoubleAttribute("oglZNear");
-  oglZFar = element.GetDoubleAttribute("oglZFar");
   standardSortMethod = element.GetBoolAttribute("standardSortMethod");
   stopSoundsOnStartup = element.GetBoolAttribute("stopSoundsOnStartup");
   disableInputWhenNotFocused =
@@ -364,20 +370,23 @@ void Layout::UnserializeFrom(gd::Project& project,
                             "Behavior");  // Compatibility with GD <= 4
     gd::String name = sharedDataElement.GetStringAttribute("name", "", "Name");
 
-    auto behaviorContent = gd::make_unique<gd::BehaviorContent>(name, type);
-    // Compatibility with GD <= 4.0.98
-    // If there is only one child called "content" (in addition to "type" and
-    // "name"), it's the content of a JavaScript behavior. Move the content
-    // out of the "content" object (to put it directly at the root of the
-    // behavior shared data element).
-    if (sharedDataElement.HasChild("content")) {
-      behaviorContent->UnserializeFrom(sharedDataElement.GetChild("content"));
+
+    auto sharedData = CreateBehaviorsSharedData(project, name, type);
+    if (sharedData) {
+      // Compatibility with GD <= 4.0.98
+      // If there is only one child called "content" (in addition to "type" and
+      // "name"), it's the content of a JavaScript behavior. Move the content
+      // out of the "content" object (to put it directly at the root of the
+      // behavior shared data element).
+      if (sharedDataElement.HasChild("content")) {
+        sharedData->UnserializeFrom(sharedDataElement.GetChild("content"));
+      }
+      // end of compatibility code
+      else {
+        sharedData->UnserializeFrom(sharedDataElement);
+      }
+      behaviorsSharedData[name] = std::move(sharedData);
     }
-    // end of compatibility code
-    else {
-      behaviorContent->UnserializeFrom(sharedDataElement);
-    }
-    behaviorsSharedData[name] = std::move(behaviorContent);
   }
 }
 
@@ -388,9 +397,6 @@ void Layout::Init(const Layout& other) {
   backgroundColorB = other.backgroundColorB;
   standardSortMethod = other.standardSortMethod;
   title = other.title;
-  oglFOV = other.oglFOV;
-  oglZNear = other.oglZNear;
-  oglZFar = other.oglZFar;
   stopSoundsOnStartup = other.stopSoundsOnStartup;
   disableInputWhenNotFocused = other.disableInputWhenNotFocused;
   initialInstances = other.initialInstances;
@@ -402,7 +408,7 @@ void Layout::Init(const Layout& other) {
   behaviorsSharedData.clear();
   for (const auto& it : other.behaviorsSharedData) {
     behaviorsSharedData[it.first] =
-        std::unique_ptr<gd::BehaviorContent>(it.second->Clone());
+        std::unique_ptr<gd::BehaviorsSharedData>(it.second->Clone());
   }
 
   events = other.events;

Core/GDCore/Project/Layout.h

@@ -17,14 +17,12 @@
 #include "GDCore/Project/ObjectsContainer.h"
 #include "GDCore/Project/VariablesContainer.h"
 #include "GDCore/String.h"
-#if defined(GD_IDE_ONLY)
 #include "GDCore/IDE/Dialogs/LayoutEditorCanvas/EditorSettings.h"
-#endif
+
 namespace gd {
 class BaseEvent;
 class Object;
 class Project;
-class BehaviorContent;
 class InitialInstancesContainer;
 }  // namespace gd
 class TiXmlElement;
@@ -131,7 +129,6 @@ class GD_CORE_API Layout : public ObjectsContainer {
    */
   ///@{
 
-#if defined(GD_IDE_ONLY)
   /**
    * Get the events of the layout
    */
@@ -141,7 +138,7 @@ class GD_CORE_API Layout : public ObjectsContainer {
    * Get the events of the layout
    */
   gd::EventsList& GetEvents() { return events; }
-#endif
+
   ///@}
 
   /** \name Variable management
@@ -238,12 +235,10 @@ class GD_CORE_API Layout : public ObjectsContainer {
    */
   void MoveLayer(std::size_t oldIndex, std::size_t newIndex);
 
-#if defined(GD_IDE_ONLY)
   /**
    * \brief Serialize the layers.
    */
   void SerializeLayersTo(SerializerElement& element) const;
-#endif
 
   /**
    * \brief Unserialize the layers.
@@ -274,21 +269,21 @@ class GD_CORE_API Layout : public ObjectsContainer {
   /**
    * \brief Get the shared data stored for a behavior
    */
-  const gd::BehaviorContent& GetBehaviorSharedData(
+  const gd::BehaviorsSharedData& GetBehaviorSharedData(
       const gd::String& behaviorName) const;
 
   /**
    * \brief Get the shared data stored for a behavior
    */
-  gd::BehaviorContent& GetBehaviorSharedData(const gd::String& behaviorName);
+  gd::BehaviorsSharedData& GetBehaviorSharedData(const gd::String& behaviorName);
 
   /**
    * \brief Get a map of all shared data stored for behaviors
    */
-  const std::map<gd::String, std::unique_ptr<gd::BehaviorContent>>&
+  const std::map<gd::String, std::unique_ptr<gd::BehaviorsSharedData>>&
   GetAllBehaviorSharedData() const;
 
-#if defined(GD_IDE_ONLY)
+
   /**
    * Return the settings associated to the layout.
    * \see gd::EditorSettings
@@ -304,7 +299,6 @@ class GD_CORE_API Layout : public ObjectsContainer {
   gd::EditorSettings& GetAssociatedEditorSettings() {
     return editorSettings;
   }
-#endif
 
   /** \name Other properties
    */
@@ -345,48 +339,16 @@ class GD_CORE_API Layout : public ObjectsContainer {
    * launched
    */
   bool StopSoundsOnStartup() const { return stopSoundsOnStartup; }
-
-  /**
-   * Set OpenGL default field of view
-   */
-  void SetOpenGLFOV(float oglFOV_) { oglFOV = oglFOV_; }
-
-  /**
-   * Get OpenGL default field of view
-   */
-  float GetOpenGLFOV() const { return oglFOV; }
-
-  /**
-   * Set OpenGL near clipping plan
-   */
-  void SetOpenGLZNear(float oglZNear_) { oglZNear = oglZNear_; }
-
-  /**
-   * Get OpenGL near clipping plan
-   */
-  float GetOpenGLZNear() const { return oglZNear; }
-
-  /**
-   * Set OpenGL far clipping plan
-   */
-  void SetOpenGLZFar(float oglZFar_) { oglZFar = oglZFar_; }
-
-  /**
-   * Get OpenGL far clipping plan
-   */
-  float GetOpenGLZFar() const { return oglZFar; }
 ///@}
 
 /** \name Saving and loading
  * Members functions related to saving and loading the object.
  */
 ///@{
-#if defined(GD_IDE_ONLY)
   /**
    * \brief Serialize the layout.
    */
   void SerializeTo(SerializerElement& element) const;
-#endif
 
   /**
    * \brief Unserialize the layout.
@@ -395,7 +357,6 @@ class GD_CORE_API Layout : public ObjectsContainer {
 ///@}
 
 // TODO: GD C++ Platform specific code below
-#if defined(GD_IDE_ONLY)
   /**
    * Get the profiler associated with the scene. Can be NULL.
    */
@@ -405,7 +366,6 @@ class GD_CORE_API Layout : public ObjectsContainer {
    * Set the profiler associated with the scene. Can be NULL.
    */
   void SetProfiler(BaseProfiler* profiler_) { profiler = profiler_; };
-#endif
 
  private:
   gd::String name;         ///< Scene name
@@ -417,38 +377,38 @@ class GD_CORE_API Layout : public ObjectsContainer {
   gd::VariablesContainer variables;  ///< Variables list
   gd::InitialInstancesContainer initialInstances;  ///< Initial instances
   std::vector<gd::Layer> initialLayers;            ///< Initial layers
-  std::map<gd::String, std::unique_ptr<gd::BehaviorContent>>
+  std::map<gd::String, std::unique_ptr<gd::BehaviorsSharedData>>
       behaviorsSharedData;   ///< Initial shared datas of behaviors
   bool stopSoundsOnStartup;  ///< True to make the scene stop all sounds at
                              ///< startup.
   bool standardSortMethod;   ///< True to sort objects using standard sort.
-  float oglFOV;              ///< OpenGL Field Of View value
-  float oglZNear;            ///< OpenGL Near Z position
-  float oglZFar;             ///< OpenGL Far Z position
   bool disableInputWhenNotFocused;  /// If set to true, the input must be
                                     /// disabled when the window do not have the
                                     /// focus.
   static gd::Layer badLayer;  ///< Null object, returned when GetLayer can not
                               ///< find an appropriate layer.
-  static gd::BehaviorContent
-      badBehaviorContent;  ///< Null object, returned when
+  static gd::BehaviorsSharedData
+      badBehaviorSharedData;  ///< Null object, returned when
                            ///< GetBehaviorSharedData can not find the
                            ///< specified behavior shared data.
-#if defined(GD_IDE_ONLY)
+
   EventsList events;  ///< Scene events
   gd::EditorSettings editorSettings;
-#endif
 
 // TODO: GD C++ Platform specific code below
-#if defined(GD_IDE_ONLY)
+
   BaseProfiler* profiler;  ///< Pointer to the profiler. Can be NULL.
-#endif
 
   /**
    * Initialize from another layout. Used by copy-ctor and assign-op.
    * Don't forget to update me if members were changed!
    */
   void Init(const gd::Layout& other);
+
+  std::unique_ptr<gd::BehaviorsSharedData> CreateBehaviorsSharedData(
+      gd::Project& project,
+      const gd::String& name,
+      const gd::String& behaviorsType);
 };
 
 /**

Core/GDCore/Project/Object.cpp

@@ -9,29 +9,52 @@
 #include "GDCore/Extensions/Metadata/MetadataProvider.h"
 #include "GDCore/Extensions/Platform.h"
 #include "GDCore/Project/Behavior.h"
+#include "GDCore/Project/CustomBehavior.h"
 #include "GDCore/Project/Layout.h"
 #include "GDCore/Project/Project.h"
 #include "GDCore/Serialization/SerializerElement.h"
 #include "GDCore/Project/PropertyDescriptor.h"
+#include "GDCore/Tools/Log.h"
 
 namespace gd {
 
 Object::~Object() {}
 
-Object::Object(const gd::String& name_) : name(name_) {}
+Object::Object(const gd::String& name_,
+               const gd::String& type_,
+               std::unique_ptr<gd::ObjectConfiguration> configuration_)
+    : name(name_), configuration(std::move(configuration_)) {
+      SetType(type_);
+    }
+
+Object::Object(const gd::String& name_,
+               const gd::String& type_,
+               gd::ObjectConfiguration* configuration_)
+    : name(name_), configuration(configuration_) {
+      SetType(type_);
+    }
 
 void Object::Init(const gd::Object& object) {
   name = object.name;
   assetStoreId = object.assetStoreId;
-  type = object.type;
   objectVariables = object.objectVariables;
   tags = object.tags;
   effectsContainer = object.effectsContainer;
 
   behaviors.clear();
   for (auto& it : object.behaviors) {
-    behaviors[it.first] = gd::make_unique<gd::BehaviorContent>(*it.second);
+    behaviors[it.first] = gd::make_unique<gd::Behavior>(*it.second);
   }
+
+  configuration = object.configuration->Clone();
+}
+
+gd::ObjectConfiguration& Object::GetConfiguration() {
+  return *configuration;
+}
+
+const gd::ObjectConfiguration& Object::GetConfiguration() const {
+  return *configuration;
 }
 
 std::vector<gd::String> Object::GetAllBehaviorNames() const {
@@ -49,7 +72,7 @@ bool Object::RenameBehavior(const gd::String& name, const gd::String& newName) {
       behaviors.find(newName) != behaviors.end())
     return false;
 
-  std::unique_ptr<BehaviorContent> aut =
+  std::unique_ptr<Behavior> aut =
       std::move(behaviors.find(name)->second);
   behaviors.erase(name);
   behaviors[newName] = std::move(aut);
@@ -58,11 +81,11 @@ bool Object::RenameBehavior(const gd::String& name, const gd::String& newName) {
   return true;
 }
 
-gd::BehaviorContent& Object::GetBehavior(const gd::String& name) {
+gd::Behavior& Object::GetBehavior(const gd::String& name) {
   return *behaviors.find(name)->second;
 }
 
-const gd::BehaviorContent& Object::GetBehavior(const gd::String& name) const {
+const gd::Behavior& Object::GetBehavior(const gd::String& name) const {
   return *behaviors.find(name)->second;
 }
 
@@ -70,47 +93,41 @@ bool Object::HasBehaviorNamed(const gd::String& name) const {
   return behaviors.find(name) != behaviors.end();
 }
 
-gd::BehaviorContent& Object::AddBehavior(
-    const gd::BehaviorContent& behaviorContent) {
-  const gd::String& behaviorName = behaviorContent.GetName();
-  auto newBehaviorContent =
-      gd::make_unique<gd::BehaviorContent>(behaviorContent);
-  behaviors[behaviorName] = std::move(newBehaviorContent);
-  return *behaviors[behaviorName];
-}
-
-std::map<gd::String, gd::PropertyDescriptor> Object::GetProperties() const {
-  std::map<gd::String, gd::PropertyDescriptor> nothing;
-  return nothing;
-}
-
-gd::BehaviorContent* Object::AddNewBehavior(const gd::Project& project,
+gd::Behavior* Object::AddNewBehavior(const gd::Project& project,
                                             const gd::String& type,
                                             const gd::String& name) {
-  const gd::BehaviorMetadata& behaviorMetadata =
-      gd::MetadataProvider::GetBehaviorMetadata(project.GetCurrentPlatform(),
-                                                type);
-  if (gd::MetadataProvider::IsBadBehaviorMetadata(behaviorMetadata)) {
-    return nullptr;
+  auto initializeAndAdd =
+      [this, &name](std::unique_ptr<gd::Behavior> behavior) {
+    behavior->InitializeContent();
+    this->behaviors[name] = std::move(behavior);
+    return this->behaviors[name].get();
+  };
+
+  if (project.HasEventsBasedBehavior(type)) {
+    return initializeAndAdd(
+        gd::make_unique<CustomBehavior>(name, project, type));
+  }
+  else {
+    const gd::BehaviorMetadata& behaviorMetadata =
+        gd::MetadataProvider::GetBehaviorMetadata(project.GetCurrentPlatform(),
+                                                  type);
+    if (gd::MetadataProvider::IsBadBehaviorMetadata(behaviorMetadata)) {
+      gd::LogWarning("Tried to create a behavior with an unknown type: " + type
+                     + " on object " + GetName() + "!");
+    // It's probably an events-based object that was removed.
+    // Create a custom behavior to preserve the properties values.
+    return initializeAndAdd(
+        gd::make_unique<CustomBehavior>(name, project, type));
+    }
+    std::unique_ptr<gd::Behavior> behavior(behaviorMetadata.Get().Clone());
+    behavior->SetName(name);
+    return initializeAndAdd(std::move(behavior));
   }
-
-  auto behaviorContent = gd::make_unique<gd::BehaviorContent>(name, type);
-  behaviorMetadata.Get().InitializeContent(behaviorContent->GetContent());
-  behaviors[name] = std::move(behaviorContent);
-  return behaviors[name].get();
-}
-
-std::map<gd::String, gd::PropertyDescriptor>
-Object::GetInitialInstanceProperties(const gd::InitialInstance& instance,
-                                     gd::Project& project,
-                                     gd::Layout& layout) {
-  std::map<gd::String, gd::PropertyDescriptor> nothing;
-  return nothing;
 }
 
 void Object::UnserializeFrom(gd::Project& project,
                              const SerializerElement& element) {
-  type = element.GetStringAttribute("type");
+  SetType(element.GetStringAttribute("type"));
   assetStoreId = element.GetStringAttribute("assetStoreId");
   name = element.GetStringAttribute("name", name, "nom");
   tags = element.GetStringAttribute("tags");
@@ -133,9 +150,8 @@ void Object::UnserializeFrom(gd::Project& project,
                             .FindAndReplace("Automatism", "Behavior");
       gd::String name = behaviorElement.GetStringAttribute("name", "", "Name");
 
-      auto behaviorContent = gd::make_unique<gd::BehaviorContent>(name, type);
-      behaviorContent->UnserializeFrom(behaviorElement);
-      behaviors[name] = std::move(behaviorContent);
+      auto behavior = gd::Object::AddNewBehavior(project, type, name);
+      behavior->UnserializeFrom(behaviorElement);
     }
   }
   // End of compatibility code
@@ -151,7 +167,7 @@ void Object::UnserializeFrom(gd::Project& project,
               "Automatism", "Behavior");  // Compatibility with GD <= 4
       gd::String name = behaviorElement.GetStringAttribute("name");
 
-      auto behaviorContent = gd::make_unique<gd::BehaviorContent>(name, type);
+      auto behavior = gd::Object::AddNewBehavior(project, type, name);
       // Compatibility with GD <= 4.0.98
       // If there is only one child called "content" (in addition to "type" and
       // "name"), it's the content of a JavaScript behavior. Move the content
@@ -169,17 +185,16 @@ void Object::UnserializeFrom(gd::Project& project,
           contentElement.RemoveChild("type");
         }
 
-        behaviorContent->UnserializeFrom(contentElement);
+        behavior->UnserializeFrom(contentElement);
       }
       // end of compatibility code
       else {
-        behaviorContent->UnserializeFrom(behaviorElement);
+        behavior->UnserializeFrom(behaviorElement);
       }
-      behaviors[name] = std::move(behaviorContent);
     }
   }
 
-  DoUnserializeFrom(project, element);
+  configuration->UnserializeFrom(project, element);
 }
 
 void Object::SerializeTo(SerializerElement& element) const {
@@ -194,18 +209,18 @@ void Object::SerializeTo(SerializerElement& element) const {
   behaviorsElement.ConsiderAsArrayOf("behavior");
   std::vector<gd::String> allBehaviors = GetAllBehaviorNames();
   for (std::size_t i = 0; i < allBehaviors.size(); ++i) {
-    const gd::BehaviorContent& behaviorContent = GetBehavior(allBehaviors[i]);
+    const gd::Behavior& behavior = GetBehavior(allBehaviors[i]);
     SerializerElement& behaviorElement = behaviorsElement.AddChild("behavior");
 
-    behaviorContent.SerializeTo(behaviorElement);
+    behavior.SerializeTo(behaviorElement);
     behaviorElement.RemoveChild("type");  // The content can contain type or
                                           // name properties, remove them.
     behaviorElement.RemoveChild("name");
-    behaviorElement.SetAttribute("type", behaviorContent.GetTypeName());
-    behaviorElement.SetAttribute("name", behaviorContent.GetName());
+    behaviorElement.SetAttribute("type", behavior.GetTypeName());
+    behaviorElement.SetAttribute("name", behavior.GetName());
   }
 
-  DoSerializeTo(element);
+  configuration->SerializeTo(element);
 }
 
 }  // namespace gd

Core/GDCore/Project/Object.h

@@ -10,11 +10,13 @@
 #include <memory>
 #include <vector>
 
-#include "GDCore/Project/BehaviorContent.h"
+#include "GDCore/Project/Behavior.h"
+#include "GDCore/Project/ObjectConfiguration.h"
 #include "GDCore/Project/EffectsContainer.h"
 #include "GDCore/Project/VariablesContainer.h"
 #include "GDCore/String.h"
 #include "GDCore/Tools/MakeUnique.h"
+
 namespace gd {
 class PropertyDescriptor;
 class Project;
@@ -28,7 +30,7 @@ class EffectsContainer;
 namespace gd {
 
 /**
- * \brief Base class used to represent an object of a platform
+ * \brief Represent an object of a platform
  *
  * \ingroup PlatformDefinition
  */
@@ -36,9 +38,19 @@ class GD_CORE_API Object {
  public:
   /**
    * Create a new object with the name passed as argument.
-   * \param name Object's name
    */
-  Object(const gd::String& name);
+  Object(const gd::String& name,
+         const gd::String& type,
+         std::unique_ptr<gd::ObjectConfiguration> configuration);
+
+  /**
+   * Create a new object with the name passed as argument.
+   * 
+   * Object takes the ownership of the configuration.
+   */
+  Object(const gd::String& name,
+         const gd::String& type,
+         gd::ObjectConfiguration* configuration);
 
   /**
    * Copy constructor. Calls Init().
@@ -70,6 +82,13 @@ class GD_CORE_API Object {
     return gd::make_unique<gd::Object>(*this);
   }
 
+  /**
+   * \brief Return the object configuration.
+   */
+  gd::ObjectConfiguration& GetConfiguration();
+
+  const gd::ObjectConfiguration& GetConfiguration() const;
+
   /** \name Common properties
    * Members functions related to common properties
    */
@@ -93,11 +112,15 @@ class GD_CORE_API Object {
 
   /** \brief Change the type of the object.
    */
-  void SetType(const gd::String& type_) { type = type_; }
+  void SetType(const gd::String& type_) {
+    configuration->SetType(type_);
+  }
 
   /** \brief Return the type of the object.
    */
-  const gd::String& GetType() const { return type; }
+  const gd::String& GetType() const {
+    return configuration->GetType();
+  }
 
   /** \brief Change the tags of the object.
    */
@@ -108,92 +131,6 @@ class GD_CORE_API Object {
   const gd::String& GetTags() const { return tags; }
   ///@}
 
-  /** \name Resources management
-   * Members functions related to managing resources used by the object
-   */
-  ///@{
-  /**
-   * \brief Called ( e.g. during compilation ) so as to inventory internal
-   * resources and sometimes update their filename. Implementation example:
-   * \code
-   * worker.ExposeImage(myImage);
-   * worker.ExposeFile(myResourceFile);
-   * \endcode
-   *
-   * \see ArbitraryResourceWorker
-   */
-  virtual void ExposeResources(gd::ArbitraryResourceWorker& worker) { return; };
-
-  /**
-   * Redefine this function to return true if your object can use shaders.
-   */
-  virtual bool SupportShaders() { return false; }
-  ///@}
-
-  /** \name Object properties
-   * Reading and updating object properties
-   */
-  ///@{
-  /**
-   * \brief Called when the IDE wants to know about the custom properties of the
-   object.
-   *
-   * Usage example:
-   \code
-      std::map<gd::String, gd::PropertyDescriptor> properties;
-      properties[ToString(_("Text"))].SetValue("Hello world!");
-
-      return properties;
-   \endcode
-   *
-   * \return a std::map with properties names as key.
-   * \see gd::PropertyDescriptor
-   */
-  virtual std::map<gd::String, gd::PropertyDescriptor> GetProperties() const;
-
-  /**
-   * \brief Called when the IDE wants to update a custom property of the object
-   *
-   * \return false if the new value cannot be set
-   */
-  virtual bool UpdateProperty(const gd::String& name, const gd::String& value) {
-    return false;
-  };
-  ///@}
-
-  /** \name Drawing and editing initial instances
-   * Members functions related to drawing and editing initial instances of this
-   * object
-   */
-  ///@{
-  /**
-   * \brief Called when the IDE wants to know about the custom properties of an
-   * initial instance of this object.
-   *
-   * \return a std::map with properties names as key and values.
-   * \see gd::InitialInstance
-   */
-  virtual std::map<gd::String, gd::PropertyDescriptor>
-  GetInitialInstanceProperties(const gd::InitialInstance& instance,
-                               gd::Project& project,
-                               gd::Layout& layout);
-
-  /**
-   * \brief Called when the IDE wants to update a custom property of an initial
-   * instance of this object.
-   *
-   * \return false if the new value cannot be set
-   * \see gd::InitialInstance
-   */
-  virtual bool UpdateInitialInstanceProperty(gd::InitialInstance& instance,
-                                             const gd::String& name,
-                                             const gd::String& value,
-                                             gd::Project& project,
-                                             gd::Layout& layout) {
-    return false;
-  };
-    ///@}
-
   /** \name Behaviors management
    * Members functions related to behaviors management.
    */
@@ -208,12 +145,12 @@ class GD_CORE_API Object {
   /**
    * \brief Return a reference to the content of the behavior called \a name.
    */
-  BehaviorContent& GetBehavior(const gd::String& name);
+  Behavior& GetBehavior(const gd::String& name);
 
   /**
    * \brief Return a reference to the content of the behavior called \a name.
    */
-  const BehaviorContent& GetBehavior(const gd::String& name) const;
+  const Behavior& GetBehavior(const gd::String& name) const;
 
   /**
    * \brief Return true if object has a behavior called \a name.
@@ -231,13 +168,6 @@ class GD_CORE_API Object {
    */
   bool RenameBehavior(const gd::String& name, const gd::String& newName);
 
-  /**
-   * \brief Add the specified behavior content to the object
-   *
-   * \return A reference to the newly added behavior content.
-   */
-  gd::BehaviorContent& AddBehavior(const gd::BehaviorContent& behavior);
-
   /**
    * \brief Add the behavior of the specified \a type with the specified \a
    * name.
@@ -247,15 +177,15 @@ class GD_CORE_API Object {
    * \return A pointer to the newly added behavior content. NULL if the creation
    * failed.
    */
-  gd::BehaviorContent* AddNewBehavior(const gd::Project& project,
-                                      const gd::String& type,
-                                      const gd::String& name);
+  gd::Behavior* AddNewBehavior(const gd::Project& project,
+                               const gd::String& type,
+                               const gd::String& name);
 
   /**
    * \brief Get a read-only access to the map containing the behaviors with
    * their properties.
    */
-  const std::map<gd::String, std::unique_ptr<gd::BehaviorContent>>&
+  const std::map<gd::String, std::unique_ptr<gd::Behavior>>&
   GetAllBehaviorContents() const {
     return behaviors;
   };
@@ -316,9 +246,8 @@ class GD_CORE_API Object {
  protected:
   gd::String name;  ///< The full name of the object
   gd::String assetStoreId;  ///< The ID of the asset if the object comes from the store.
-  gd::String type;  ///< Which type is the object. ( To test if we can do
-                    ///< something reserved to some objects with it )
-  std::map<gd::String, std::unique_ptr<gd::BehaviorContent>>
+  std::unique_ptr<gd::ObjectConfiguration> configuration;
+  std::map<gd::String, std::unique_ptr<gd::Behavior>>
       behaviors;  ///< Contains all behaviors and their properties for the
                   ///< object. Behavior contents are the ownership of the
                   ///< object.
@@ -328,20 +257,12 @@ class GD_CORE_API Object {
   gd::EffectsContainer
       effectsContainer;  ///< The effects container for the object.
 
-  /**
-   * \brief Derived objects can redefine this method to load custom attributes.
-   */
-  virtual void DoUnserializeFrom(gd::Project& project,
-                                 const SerializerElement& element){};
-
-  /**
-   * \brief Derived objects can redefine this method to save custom attributes.
-   */
-  virtual void DoSerializeTo(SerializerElement& element) const {};
-
   /**
    * Initialize object using another object. Used by copy-ctor and assign-op.
    * Don't forget to update me if members were changed!
+   * 
+   * It's needed because there is no default copy for a map of unique_ptr like
+   * behaviors and it must be a deep copy.
    */
   void Init(const gd::Object& object);
 };

Core/GDCore/Project/ObjectConfiguration.cpp

@@ -0,0 +1,47 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#include "GDCore/Project/ObjectConfiguration.h"
+
+#include "GDCore/Extensions/Metadata/BehaviorMetadata.h"
+#include "GDCore/Extensions/Metadata/MetadataProvider.h"
+#include "GDCore/Extensions/Platform.h"
+#include "GDCore/Project/Behavior.h"
+#include "GDCore/Project/CustomBehavior.h"
+#include "GDCore/Project/Layout.h"
+#include "GDCore/Project/Project.h"
+#include "GDCore/Serialization/SerializerElement.h"
+#include "GDCore/Project/PropertyDescriptor.h"
+#include "GDCore/Tools/Log.h"
+
+namespace gd {
+
+ObjectConfiguration::~ObjectConfiguration() {}
+
+ObjectConfiguration::ObjectConfiguration() {}
+
+std::map<gd::String, gd::PropertyDescriptor> ObjectConfiguration::GetProperties() const {
+  std::map<gd::String, gd::PropertyDescriptor> nothing;
+  return nothing;
+}
+
+std::map<gd::String, gd::PropertyDescriptor>
+ObjectConfiguration::GetInitialInstanceProperties(const gd::InitialInstance& instance,
+                                     gd::Project& project,
+                                     gd::Layout& layout) {
+  std::map<gd::String, gd::PropertyDescriptor> nothing;
+  return nothing;
+}
+
+void ObjectConfiguration::UnserializeFrom(gd::Project& project,
+                             const SerializerElement& element) {
+  DoUnserializeFrom(project, element);
+}
+
+void ObjectConfiguration::SerializeTo(SerializerElement& element) const {
+  DoSerializeTo(element);
+}
+
+}  // namespace gd

Core/GDCore/Project/ObjectConfiguration.h

@@ -0,0 +1,194 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#ifndef GDCORE_OBJECTCONFIGURATION_H
+#define GDCORE_OBJECTCONFIGURATION_H
+#include "GDCore/Vector2.h"
+#include <map>
+#include <memory>
+#include <vector>
+
+#include "GDCore/Project/Behavior.h"
+#include "GDCore/Project/EffectsContainer.h"
+#include "GDCore/Project/VariablesContainer.h"
+#include "GDCore/String.h"
+#include "GDCore/Tools/MakeUnique.h"
+namespace gd {
+class PropertyDescriptor;
+class Project;
+class Layout;
+class ArbitraryResourceWorker;
+class InitialInstance;
+class SerializerElement;
+class EffectsContainer;
+}  // namespace gd
+
+namespace gd {
+
+/**
+ * \brief Base class used to represent an object configuration.
+ * For example, this can be the animations in a sprite, the text, its font,
+ * its color in a Text object, etc...
+ *
+ * \ingroup PlatformDefinition
+ */
+class GD_CORE_API ObjectConfiguration {
+ public:
+  /**
+   * Create a new object configuration.
+   */
+  ObjectConfiguration();
+
+  /**
+   * Destructor.
+   */
+  virtual ~ObjectConfiguration();
+
+  /**
+   * Must return a pointer to a copy of the configuration. This method is
+   * needed to do polymorphic copies. Just redefine this method in your derived
+   * object class like this:
+   * \code
+   * return gd::make_unique<MyObjectConfiguration>(*this);
+   * \endcode
+   */
+  virtual std::unique_ptr<gd::ObjectConfiguration> Clone() const {
+    return gd::make_unique<gd::ObjectConfiguration>(*this);
+  }
+
+  /** \brief Change the type of the object.
+   */
+  void SetType(const gd::String& type_) { type = type_; }
+
+  /** \brief Return the type of the object.
+   */
+  const gd::String& GetType() const { return type; }
+
+  /** \name Object properties
+   * Reading and updating object configuration properties
+   */
+  ///@{
+  /**
+   * \brief Called when the IDE wants to know about the custom properties of the
+   object configuration.
+   *
+   * Usage example:
+   \code
+      std::map<gd::String, gd::PropertyDescriptor> properties;
+      properties[ToString(_("Text"))].SetValue("Hello world!");
+
+      return properties;
+   \endcode
+   *
+   * \return a std::map with properties names as key.
+   * \see gd::PropertyDescriptor
+   */
+  virtual std::map<gd::String, gd::PropertyDescriptor> GetProperties() const;
+
+  /**
+   * \brief Called when the IDE wants to update a custom property of the object
+   * configuration.
+   *
+   * \return false if the new value cannot be set
+   */
+  virtual bool UpdateProperty(const gd::String& name, const gd::String& value) {
+    return false;
+  };
+  ///@}
+
+  /** \name Drawing and editing initial instances
+   * Members functions related to drawing and editing initial instances of this
+   * object configuration
+   */
+  ///@{
+  /**
+   * \brief Called when the IDE wants to know about the custom properties of an
+   * initial instance of this object configuration.
+   *
+   * \return a std::map with properties names as key and values.
+   * \see gd::InitialInstance
+   */
+  virtual std::map<gd::String, gd::PropertyDescriptor>
+  GetInitialInstanceProperties(const gd::InitialInstance& instance,
+                               gd::Project& project,
+                               gd::Layout& layout);
+
+  /**
+   * \brief Called when the IDE wants to update a custom property of an initial
+   * instance of this object configuration.
+   *
+   * \return false if the new value cannot be set
+   * \see gd::InitialInstance
+   */
+  virtual bool UpdateInitialInstanceProperty(gd::InitialInstance& instance,
+                                             const gd::String& name,
+                                             const gd::String& value,
+                                             gd::Project& project,
+                                             gd::Layout& layout) {
+    return false;
+  };
+    ///@}
+
+  /** \name Resources management
+   * Members functions related to managing resources used by the object configuration
+   */
+  ///@{
+
+  /**
+   * \brief Called ( e.g. during compilation ) so as to inventory internal
+   * resources and sometimes update their filename. Implementation example:
+   * \code
+   * worker.ExposeImage(myImage);
+   * worker.ExposeFile(myResourceFile);
+   * \endcode
+   *
+   * \see ArbitraryResourceWorker
+   */
+  virtual void ExposeResources(gd::ArbitraryResourceWorker& worker) { return; };
+  ///@}
+
+/** \name Serialization
+ * Members functions related to serialization of the object configuration
+ */
+///@{
+  /**
+   * \brief Serialize the object configuration.
+   * \see DoSerializeTo
+   */
+  void SerializeTo(SerializerElement& element) const;
+
+  /**
+   * \brief Unserialize the object configuration.
+   * \see DoUnserializeFrom
+   */
+  void UnserializeFrom(gd::Project& project, const SerializerElement& element);
+  ///@}
+
+ protected:
+  gd::String type; ///< Which type of object is represented by this
+                   ///< configuration.
+
+  /**
+   * \brief Derived object configuration can redefine this method to load
+   * custom attributes.
+   */
+  virtual void DoUnserializeFrom(gd::Project& project,
+                                 const SerializerElement& element){};
+
+  /**
+   * \brief Derived object configuration can redefine this method to save
+   * custom attributes.
+   */
+  virtual void DoSerializeTo(SerializerElement& element) const {};
+};
+
+}  // namespace gd
+
+/**
+ * Object configurations are usually managed thanks to (smart) pointers.
+ */
+using ObjConfSPtr = std::unique_ptr<gd::ObjectConfiguration>;
+
+#endif  // GDCORE_OBJECT_H

Core/GDCore/Project/ObjectsContainer.cpp

@@ -83,7 +83,7 @@ gd::Object& ObjectsContainer::InsertNewObject(const gd::Project& project,
   gd::Object& newlyCreatedObject = *(*(initialObjects.insert(
       position < initialObjects.size() ? initialObjects.begin() + position
                                        : initialObjects.end(),
-      project.GetCurrentPlatform().CreateObject(objectType, name))));
+      project.CreateObject(objectType, name))));
 
   return newlyCreatedObject;
 }

Core/GDCore/Project/Project.cpp

@@ -23,10 +23,12 @@
 #include "GDCore/IDE/PlatformManager.h"
 #include "GDCore/IDE/Project/ArbitraryResourceWorker.h"
 #include "GDCore/Project/EventsFunctionsExtension.h"
+#include "GDCore/Project/CustomObjectConfiguration.h"
 #include "GDCore/Project/ExternalEvents.h"
 #include "GDCore/Project/ExternalLayout.h"
 #include "GDCore/Project/Layout.h"
 #include "GDCore/Project/Object.h"
+#include "GDCore/Project/ObjectConfiguration.h"
 #include "GDCore/Project/ObjectGroupsContainer.h"
 #include "GDCore/Project/ResourcesManager.h"
 #include "GDCore/Project/SourceFile.h"
@@ -79,22 +81,84 @@ Project::~Project() {}
 void Project::ResetProjectUuid() { projectUuid = UUID::MakeUuid4(); }
 
 std::unique_ptr<gd::Object> Project::CreateObject(
-    const gd::String& type,
-    const gd::String& name,
-    const gd::String& platformName) {
-  for (std::size_t i = 0; i < platforms.size(); ++i) {
-    if (!platformName.empty() && platforms[i]->GetName() != platformName)
-      continue;
+  const gd::String& type,
+  const gd::String& name) const {
+    return gd::make_unique<Object>(name, type, CreateObjectConfiguration(type));
+}
 
-    std::unique_ptr<gd::Object> object = platforms[i]->CreateObject(
-        type, name);  // Create a base object if the type can't be found in the
-                      // platform
-    if (object && object->GetType() == type)
-      return object;  // If the object is valid and has the good type (not a
-                      // base object), return it
+std::unique_ptr<gd::ObjectConfiguration> Project::CreateObjectConfiguration(
+  const gd::String& type) const {
+  if (Project::HasEventsBasedObject(type)) {
+    return gd::make_unique<CustomObjectConfiguration>(*this, type);
   }
+  else {
+    // Create a base object if the type can't be found in the platform.
+    return currentPlatform->CreateObjectConfiguration(type);
+  }
+}
 
-  return nullptr;
+bool Project::HasEventsBasedObject(const gd::String& type) const {
+  const auto separatorIndex = type.find(PlatformExtension::GetNamespaceSeparator());
+  if (separatorIndex == std::string::npos) {
+    return false;
+  }
+  gd::String extensionName = type.substr(0, separatorIndex);
+  if (!Project::HasEventsFunctionsExtensionNamed(extensionName)) {
+    return false;
+  }
+  auto &extension = Project::GetEventsFunctionsExtension(extensionName);
+  gd::String objectTypeName = type.substr(separatorIndex + 2);
+  return extension.GetEventsBasedObjects().Has(objectTypeName);
+}
+
+gd::EventsBasedObject& Project::GetEventsBasedObject(const gd::String& type) {
+  const auto separatorIndex = type.find(PlatformExtension::GetNamespaceSeparator());
+  gd::String extensionName = type.substr(0, separatorIndex);
+  gd::String objectTypeName = type.substr(separatorIndex + 2);
+
+  auto &extension = Project::GetEventsFunctionsExtension(extensionName);
+  return extension.GetEventsBasedObjects().Get(objectTypeName);
+}
+
+const gd::EventsBasedObject& Project::GetEventsBasedObject(const gd::String& type) const {
+  const auto separatorIndex = type.find(PlatformExtension::GetNamespaceSeparator());
+  gd::String extensionName = type.substr(0, separatorIndex);
+  gd::String objectTypeName = type.substr(separatorIndex + 2);
+
+  const auto &extension = Project::GetEventsFunctionsExtension(extensionName);
+  return extension.GetEventsBasedObjects().Get(objectTypeName);
+}
+
+bool Project::HasEventsBasedBehavior(const gd::String& type) const {
+    const auto separatorIndex = type.find(PlatformExtension::GetNamespaceSeparator());
+    if (separatorIndex == std::string::npos) {
+      return false;
+    }
+    gd::String extensionName = type.substr(0, separatorIndex);
+    if (!Project::HasEventsFunctionsExtensionNamed(extensionName)) {
+      return false;
+    }
+    auto &extension = Project::GetEventsFunctionsExtension(extensionName);
+    gd::String behaviorTypeName = type.substr(separatorIndex + 2);
+    return extension.GetEventsBasedBehaviors().Has(behaviorTypeName);
+}
+
+gd::EventsBasedBehavior& Project::GetEventsBasedBehavior(const gd::String& type) {
+    const auto separatorIndex = type.find(PlatformExtension::GetNamespaceSeparator());
+    gd::String extensionName = type.substr(0, separatorIndex);
+    gd::String behaviorTypeName = type.substr(separatorIndex + 2);
+
+    auto &extension = Project::GetEventsFunctionsExtension(extensionName);
+    return extension.GetEventsBasedBehaviors().Get(behaviorTypeName);
+}
+
+const gd::EventsBasedBehavior& Project::GetEventsBasedBehavior(const gd::String& type) const {
+    const auto separatorIndex = type.find(PlatformExtension::GetNamespaceSeparator());
+    gd::String extensionName = type.substr(0, separatorIndex);
+    gd::String behaviorTypeName = type.substr(separatorIndex + 2);
+
+    auto &extension = Project::GetEventsFunctionsExtension(extensionName);
+    return extension.GetEventsBasedBehaviors().Get(behaviorTypeName);
 }
 
 std::shared_ptr<gd::BaseEvent> Project::CreateEvent(
@@ -642,6 +706,38 @@ void Project::UnserializeFrom(const SerializerElement& element) {
   if (currentPlatform == NULL && !platforms.empty())
     currentPlatform = platforms.back();
 
+  eventsFunctionsExtensions.clear();
+  const SerializerElement& eventsFunctionsExtensionsElement =
+      element.GetChild("eventsFunctionsExtensions");
+  eventsFunctionsExtensionsElement.ConsiderAsArrayOf(
+      "eventsFunctionsExtension");
+  // First, only unserialize behaviors and objects names.
+  // As event based objects can contains CustomObject and Custom Object,
+  // this allows them to reference EventBasedBehavior and EventBasedObject
+  // respectively.
+  for (std::size_t i = 0;
+       i < eventsFunctionsExtensionsElement.GetChildrenCount();
+       ++i) {
+    const SerializerElement& eventsFunctionsExtensionElement =
+        eventsFunctionsExtensionsElement.GetChild(i);
+
+    gd::EventsFunctionsExtension& newEventsFunctionsExtension =
+        InsertNewEventsFunctionsExtension("",
+                                          GetEventsFunctionsExtensionsCount());
+    newEventsFunctionsExtension.UnserializeExtensionDeclarationFrom(
+        *this, eventsFunctionsExtensionElement);
+  }
+  // Then unserialize functions, behaviors and objects content.
+  for (std::size_t i = 0;
+       i < eventsFunctionsExtensionsElement.GetChildrenCount();
+       ++i) {
+    const SerializerElement& eventsFunctionsExtensionElement =
+        eventsFunctionsExtensionsElement.GetChild(i);
+
+    eventsFunctionsExtensions.at(i)->UnserializeExtensionImplementationFrom(
+        *this, eventsFunctionsExtensionElement);
+  }
+
   GetObjectGroups().UnserializeFrom(
       element.GetChild("objectsGroups", 0, "ObjectGroups"));
   resourcesManager.UnserializeFrom(
@@ -676,24 +772,6 @@ void Project::UnserializeFrom(const SerializerElement& element) {
     externalEvents.UnserializeFrom(*this, externalEventElement);
   }
 
-  eventsFunctionsExtensions.clear();
-  const SerializerElement& eventsFunctionsExtensionsElement =
-      element.GetChild("eventsFunctionsExtensions");
-  eventsFunctionsExtensionsElement.ConsiderAsArrayOf(
-      "eventsFunctionsExtension");
-  for (std::size_t i = 0;
-       i < eventsFunctionsExtensionsElement.GetChildrenCount();
-       ++i) {
-    const SerializerElement& eventsFunctionsExtensionElement =
-        eventsFunctionsExtensionsElement.GetChild(i);
-
-    gd::EventsFunctionsExtension& newEventsFunctionsExtension =
-        InsertNewEventsFunctionsExtension("",
-                                          GetEventsFunctionsExtensionsCount());
-    newEventsFunctionsExtension.UnserializeFrom(
-        *this, eventsFunctionsExtensionElement);
-  }
-
   externalLayouts.clear();
   const SerializerElement& externalLayoutsElement =
       element.GetChild("externalLayouts", 0, "ExternalLayouts");
@@ -868,8 +946,9 @@ void Project::ExposeResources(gd::ArbitraryResourceWorker& worker) {
   // Add layouts resources
   for (std::size_t s = 0; s < GetLayoutsCount(); s++) {
     for (std::size_t j = 0; j < GetLayout(s).GetObjectsCount();
-         ++j)  // Add objects resources
-      GetLayout(s).GetObject(j).ExposeResources(worker);
+         ++j) { // Add objects resources
+      GetLayout(s).GetObject(j).GetConfiguration().ExposeResources(worker);
+    }
 
     LaunchResourceWorkerOnEvents(*this, GetLayout(s).GetEvents(), worker);
   }
@@ -888,7 +967,7 @@ void Project::ExposeResources(gd::ArbitraryResourceWorker& worker) {
 
   // Add global objects resources
   for (std::size_t j = 0; j < GetObjectsCount(); ++j) {
-    GetObject(j).ExposeResources(worker);
+    GetObject(j).GetConfiguration().ExposeResources(worker);
   }
 
   // Add loading screen background image if present

Core/GDCore/Project/Project.h

@@ -24,7 +24,10 @@ class ExternalEvents;
 class ResourcesManager;
 class ExternalLayout;
 class EventsFunctionsExtension;
+class EventsBasedObject;
+class EventsBasedBehavior;
 class Object;
+class ObjectConfiguration;
 class VariablesContainer;
 class ArbitraryResourceWorker;
 class SourceFile;
@@ -455,20 +458,20 @@ class GD_CORE_API Project : public ObjectsContainer {
 
   /**
    * Create an object of the given type with the specified name.
-   *
-   * \note A project can use more than one platform. In this case, the first
-   * platform supporting the object is used, unless \a platformName argument is
-   * not empty.<br> It is assumed that each platform provides an equivalent
-   * object.
-   *
+   * 
    * \param type The type of the object
    * \param name The name of the object
-   * \param platformName The name of the platform to be used. If empty, the
-   * first platform supporting the object is used.
    */
   std::unique_ptr<gd::Object> CreateObject(const gd::String& type,
-                                           const gd::String& name,
-                                           const gd::String& platformName = "");
+                                           const gd::String& name) const;
+
+  /**
+   * Create an object configuration of the given type.
+   * 
+   * \param type The type of the object
+   */
+  std::unique_ptr<gd::ObjectConfiguration> CreateObjectConfiguration(
+      const gd::String& type) const;
 
   /**
    * Create an event of the given type.
@@ -827,6 +830,37 @@ class GD_CORE_API Project : public ObjectsContainer {
    * \brief Remove all the events functions extensions.
    */
   void ClearEventsFunctionsExtensions();
+
+  /**
+   * \brief  Check if events based object with a given type exists.
+   */
+  bool HasEventsBasedObject(const gd::String& type) const;
+
+  /**
+   * \brief Return the events based object with a given type.
+   */
+  gd::EventsBasedObject& GetEventsBasedObject(const gd::String& type);
+
+  /**
+   * \brief Return the events based object with a given type.
+   */
+  const gd::EventsBasedObject& GetEventsBasedObject(const gd::String& type) const;
+
+  /**
+   * \brief  Check if events based behavior with a given type exists.
+   */
+  bool HasEventsBasedBehavior(const gd::String& type) const;
+
+  /**
+   * \brief Return the events based behavior with a given type.
+   */
+  gd::EventsBasedBehavior& GetEventsBasedBehavior(const gd::String& type);
+
+  /**
+   * \brief Return the events based behavior with a given type.
+   */
+  const gd::EventsBasedBehavior& GetEventsBasedBehavior(const gd::String& type) const;
+
   ///@}
 
   /** \name Resources management