Apply scroll position after the filters panel was closed to avoid scroll offset

Don't show in changelog

.github/workflows/build-storybook.yml

@@ -17,6 +17,10 @@ jobs:
   build-storybook:
     runs-on: ubuntu-latest
     steps:
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 16
+
       - name: Configure AWS Credentials
         uses: aws-actions/configure-aws-credentials@v1
         with:
@@ -57,8 +61,8 @@ jobs:
 
       - name: Log urls to the Storybook
         run: |
-          echo "Find the latest Storybook for this branch on http://gdevelop-storybook.s3-website-us-east-1.amazonaws.com/$(git rev-parse --abbrev-ref HEAD)/latest/index.html"
-          echo "Find the Storybook for this commit on http://gdevelop-storybook.s3-website-us-east-1.amazonaws.com/$(git rev-parse --abbrev-ref HEAD)/commit/$(git rev-parse HEAD)/index.html"
+          echo "Find the latest Storybook for this branch on https://gdevelop-storybook.s3.amazonaws.com/$(git rev-parse --abbrev-ref HEAD)/latest/index.html"
+          echo "Find the Storybook for this commit on https://gdevelop-storybook.s3.amazonaws.com/$(git rev-parse --abbrev-ref HEAD)/commit/$(git rev-parse HEAD)/index.html"
 
       # Publish on Chromatic, only when manually launched (too costly to run on every commit).
       - name: Publish Storybook to Chromatic

.github/workflows/extract-translations.yml

@@ -11,6 +11,9 @@ jobs:
   extract-translations:
     runs-on: ubuntu-latest
     steps:
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 16
       - uses: actions/checkout@v2
 
       # Cache npm dependencies to speed up the workflow

.github/workflows/update-translations.yml

@@ -14,6 +14,9 @@ jobs:
   update-translations:
     runs-on: ubuntu-latest
     steps:
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 16
       - uses: actions/checkout@v2
 
       # Cache npm dependencies to speed up the workflow
@@ -66,7 +69,7 @@ jobs:
           commit-message: Update translations [skip ci]
           branch: chore/update-translations
           delete-branch: true
-          title: '[Auto PR] Update translations'
+          title: "[Auto PR] Update translations"
           body: |
             This updates the translations by downloading them from Crowdin and compiling them for usage by the app.
 

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. */";
       }
     }
@@ -670,6 +670,18 @@ gd::String EventsCodeGenerator::GenerateActionsListCode(
   return outputCode;
 }
 
+const gd::String EventsCodeGenerator::GenerateRelationalOperatorCodes(const gd::String &operatorString) {
+    if (operatorString == "=") {
+        return "==";
+    }
+    if (operatorString != "<" && operatorString != ">" &&
+        operatorString != "<=" && operatorString != ">=" && operatorString != "!=") {
+      cout << "Warning: Bad relational operator: Set to == by default." << endl;
+      return "==";
+    }
+    return operatorString;
+}
+
 gd::String EventsCodeGenerator::GenerateParameterCodes(
     const gd::Expression& parameter,
     const gd::ParameterMetadata& metadata,
@@ -679,31 +691,24 @@ 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") {
-    auto parameterString = parameter.GetPlainString();
-    argOutput += parameterString == "=" ? "==" : parameterString;
-    if (argOutput != "==" && argOutput != "<" && argOutput != ">" &&
-        argOutput != "<=" && argOutput != ">=" && argOutput != "!=") {
-      cout << "Warning: Bad relational operator: Set to == by default." << endl;
-      argOutput = "==";
-    }
-
+        GenerateObject(parameter.GetPlainString(), metadata.GetType(), context);
+  } else if (metadata.GetType() == "relationalOperator") {
+    argOutput += GenerateRelationalOperatorCodes(parameter.GetPlainString());
     argOutput = "\"" + argOutput + "\"";
-  } else if (metadata.type == "operator") {
+  } else if (metadata.GetType() == "operator") {
     argOutput += parameter.GetPlainString();
     if (argOutput != "=" && argOutput != "+" && argOutput != "-" &&
         argOutput != "/" && argOutput != "*") {
@@ -712,28 +717,30 @@ 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() == "tilemapResource" ||
+             metadata.GetType() == "tilesetResource" ||
+             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 +748,21 @@ 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 +1037,7 @@ 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 +1058,7 @@ 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/CodeGeneration/EventsCodeGenerator.h

@@ -481,6 +481,9 @@ class GD_CORE_API EventsCodeGenerator {
    */
   size_t GenerateSingleUsageUniqueIdForEventsList();
 
+  virtual const gd::String GenerateRelationalOperatorCodes(
+      const gd::String& operatorString);
+
  protected:
   /**
    * \brief Generate the code for a single parameter.

Core/GDCore/Events/Instruction.cpp

@@ -55,6 +55,10 @@ void Instruction::SetParameter(std::size_t nb, const gd::Expression& val) {
   parameters[nb] = val;
 }
 
+void Instruction::AddParameter(const gd::Expression& val) {
+  parameters.push_back(val);
+}
+
 std::shared_ptr<Instruction> GD_CORE_API
 CloneRememberingOriginalElement(std::shared_ptr<Instruction> instruction) {
   std::shared_ptr<Instruction> copy =

Core/GDCore/Events/Instruction.h

@@ -123,6 +123,11 @@ class GD_CORE_API Instruction {
    */
   void SetParameter(std::size_t nb, const gd::Expression& val);
 
+  /** Add a parameter at the end
+   * \param val The new value of the parameter
+   */
+  void AddParameter(const gd::Expression& val);
+
   /** \brief Get a reference to the std::vector containing the parameters.
    * \return A std::vector containing the parameters
    */

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/AdvancedExtension.cpp

@@ -34,6 +34,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAdvancedExtension(
           "res/function32.png")
       .SetHelpPath("/events/functions/return")
       .AddParameter("expression", "The number to be returned")
+      .SetRelevantForFunctionEventsOnly()
       .MarkAsAdvanced();
 
   extension
@@ -48,6 +49,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAdvancedExtension(
           "res/function32.png")
       .SetHelpPath("/events/functions/return")
       .AddParameter("string", "The text to be returned")
+      .SetRelevantForFunctionEventsOnly()
       .MarkAsAdvanced();
 
   extension
@@ -61,6 +63,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAdvancedExtension(
                  "res/function32.png")
       .SetHelpPath("/events/functions/return")
       .AddParameter("trueorfalse", "Should the condition be true or false?")
+      .SetRelevantForFunctionEventsOnly()
       .MarkAsAdvanced();
 
   extension
@@ -75,25 +78,56 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAdvancedExtension(
                     "res/function32.png",
                     "res/function32.png")
       .AddParameter("functionParameterName", "Parameter name")
+      .SetRelevantForFunctionEventsOnly()
       .MarkAsAdvanced();
 
   extension
       .AddExpression(
           "GetArgumentAsNumber",
           _("Get function parameter value"),
-          _("Get function parameter (also called \"argument\") value"),
+          _("Get function parameter (also called \"argument\") value."),
           "",
           "res/function16.png")
-      .AddParameter("functionParameterName", "Parameter name");
+      .AddParameter("functionParameterName", "Parameter name")
+      .SetRelevantForFunctionEventsOnly();
 
   extension
       .AddStrExpression(
           "GetArgumentAsString",
           _("Get function parameter text"),
-          _("Get function parameter (also called \"argument\") text "),
+          _("Get function parameter (also called \"argument\") text."),
           "",
           "res/function16.png")
-      .AddParameter("functionParameterName", "Parameter name");
+      .AddParameter("functionParameterName", "Parameter name")
+      .SetRelevantForFunctionEventsOnly();
+
+  extension
+      .AddCondition(
+          "CompareArgumentAsNumber",
+          _("Compare function parameter value"),
+          _("Compare function parameter (also called \"argument\") value."),
+          _("Parameter _PARAM0_"),
+          "",
+          "res/function32.png",
+          "res/function16.png")
+      .AddParameter("functionParameterName", "Parameter name")
+      .UseStandardRelationalOperatorParameters(
+          "number", gd::ParameterOptions::MakeNewOptions())
+      .SetRelevantForFunctionEventsOnly();
+
+  extension
+      .AddCondition(
+          "CompareArgumentAsString",
+          _("Compare function parameter text"),
+          _("Compare function parameter (also called \"argument\") text."),
+          _("Parameter _PARAM0_"),
+          "",
+          "res/function32.png",
+          "res/function16.png")
+      .AddParameter("functionParameterName", "Parameter name")
+      .UseStandardRelationalOperatorParameters(
+          "string", gd::ParameterOptions::MakeNewOptions())
+      .SetRelevantForFunctionEventsOnly();
 }
 
 }  // namespace gd

Core/GDCore/Extensions/Builtin/AsyncExtension.cpp

@@ -15,11 +15,13 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAsyncExtension(
   extension
       .SetExtensionInformation(
           "BuiltinAsync",
-          _("Async functions"),
+          _("Asynchronous functions"),
           _("Functions that defer the execution of the events after it."),
           "Arthur Pacaud (arthuro555)",
           "Open source (MIT License)")
       .SetCategory("Advanced");
+  extension.AddInstructionOrExpressionGroupMetadata(_("Asynchronous functions"))
+      .SetIcon("res/function32.png");
 
   extension.AddEvent("Async",
                      _("Async event"),
@@ -27,6 +29,19 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAsyncExtension(
                      "",
                      "res/eventaddicon.png",
                      std::make_shared<gd::AsyncEvent>());
+
+  extension
+      .AddAction(
+          "ResolveAsyncEventsFunction",
+          _("End asynchronous function"),
+          _("Mark an asynchronous function as finished. This will allow the "
+            "actions and subevents following it to be run."),
+          "Mark asynchronous function as ended",
+          "",
+          "res/actions/quit24.png",
+          "res/actions/quit.png")
+      .AddCodeOnlyParameter("eventsFunctionContext", "")
+      .SetRelevantForAsynchronousFunctionEventsOnly();
 }
 
 }  // namespace gd

Core/GDCore/Extensions/Builtin/AudioExtension.cpp

@@ -23,6 +23,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
       .SetCategory("Audio");
   extension.AddInstructionOrExpressionGroupMetadata(_("Sounds and music"))
       .SetIcon("res/actions/music24.png");
+  extension.AddInstructionOrExpressionGroupMetadata(_("Sounds on channels"))
+      .SetIcon("res/actions/son24.png");
 
   extension
       .AddAction("PlaySoundCanal",
@@ -146,69 +148,83 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
       .AddAction("ModVolumeSoundCanal",
                  _("Volume of the sound on a channel"),
                  _("This action modifies the volume of the sound on the "
-                   "specified channel. The volume is between 0 and 100."),
+                   "specified channel."),
                  _("the volume of the sound on channel _PARAM1_"),
                  _("Sounds on channels"),
                  "res/actions/sonVolume24.png",
                  "res/actions/sonVolume.png")
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("expression", _("Channel identifier"))
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Volume (0-100)")))
       .MarkAsAdvanced();
 
   extension
       .AddAction("ModVolumeMusicCanal",
                  _("Volume of the music on a channel"),
                  _("This action modifies the volume of the music on the "
-                   "specified channel. The volume is between 0 and 100."),
+                   "specified channel."),
                  _("the volume of the music on channel _PARAM1_"),
                  _("Music on channels"),
                  "res/actions/musicVolume24.png",
                  "res/actions/musicVolume.png")
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("expression", _("Channel identifier"))
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Volume (0-100)")))
       .MarkAsAdvanced();
 
   extension
       .AddAction("ModGlobalVolume",
                  _("Game global volume"),
-                 _("This action modifies the global volume of the game. The "
-                   "volume is between 0 and 100."),
+                 _("This action modifies the global volume of the game."),
                  _("the global sound level"),
                  "",
                  "res/actions/volume24.png",
                  "res/actions/volume.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Volume (0-100)")))
       .MarkAsSimple();
 
   extension
       .AddAction("ModPitchSoundChannel",
                  _("Pitch of the sound of a channel"),
                  _("This action modifies the pitch (speed) of the sound on a "
-                   "channel.\n1 is the default pitch."),
+                   "channel."),
                  _("the pitch of the sound on channel _PARAM1_"),
                  _("Sounds on channels"),
                  "res/actions/son24.png",
                  "res/actions/son.png")
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("expression", _("Channel identifier"))
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Pitch (1 by default)")))
       .MarkAsAdvanced();
 
   extension
       .AddAction("ModPitchMusicChannel",
                  _("Pitch of the music on a channel"),
                  _("This action modifies the pitch of the music on the "
-                   "specified channel. 1 is the default pitch"),
+                   "specified channel."),
                  _("the pitch of the music on channel _PARAM1_"),
                  _("Music on channels"),
                  "res/actions/music24.png",
                  "res/actions/music.png")
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("expression", _("Channel identifier"))
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Pitch (1 by default)")))
       .MarkAsAdvanced();
 
   extension
@@ -222,7 +238,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
                  "res/actions/son.png")
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("expression", _("Channel identifier"))
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Position (in seconds)")))
       .MarkAsAdvanced();
 
   extension
@@ -236,7 +255,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
                  "res/actions/music.png")
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("expression", _("Channel identifier"))
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Position (in seconds)")))
       .MarkAsAdvanced();
 
   extension
@@ -448,15 +470,17 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
       .AddCondition(
           "SoundCanalVolume",
           _("Volume of the sound on a channel"),
-          _("Test the volume of the sound on the specified channel. The volume "
-            "is between 0 and 100."),
+          _("Test the volume of the sound on the specified channel."),
           _("the volume of the sound on channel _PARAM1_"),
           _("Sounds on channels"),
           "res/conditions/sonVolume24.png",
           "res/conditions/sonVolume.png")
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("expression", _("Channel identifier"))
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Volume to compare to (0-100)")))
       .MarkAsAdvanced();
 
   extension
@@ -471,7 +495,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
           "res/conditions/musicVolume.png")
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("expression", _("Channel identifier"))
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Volume to compare to (0-100)")))
       .MarkAsAdvanced();
 
   extension
@@ -484,7 +511,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
           "res/conditions/volume24.png",
           "res/conditions/volume.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .UseStandardRelationalOperatorParameters("number");
+      .UseStandardRelationalOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Volume to compare to (0-100)")));
 
   extension
       .AddCondition(
@@ -498,22 +528,27 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
           "res/conditions/sonVolume.png")
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("expression", _("Channel identifier"))
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Pitch to compare to (1 by default)")))
       .MarkAsAdvanced();
 
   extension
       .AddCondition(
           "MusicChannelPitch",
           _("Pitch of the music on a channel"),
-          _("Test the pitch (speed) of the music on a specified channel. 1 is "
-            "the default pitch."),
+          _("Test the pitch (speed) of the music on a specified channel."),
           _("the pitch of the music on channel _PARAM1_"),
           _("Music on channels"),
           "res/conditions/musicVolume24.png",
           "res/conditions/musicVolume.png")
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("expression", _("Channel identifier"))
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Pitch to compare to (1 by default)")))
       .MarkAsAdvanced();
 
   extension
@@ -527,7 +562,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
           "res/conditions/sonVolume.png")
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("expression", _("Channel identifier"))
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Position to compare to (in seconds)")))
       .MarkAsAdvanced();
 
   extension
@@ -541,7 +579,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
           "res/conditions/musicVolume.png")
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("expression", _("Channel identifier"))
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Position to compare to (in seconds)")))
       .MarkAsAdvanced();
 
   extension

Core/GDCore/Extensions/Builtin/BaseObjectExtension.cpp

@@ -27,6 +27,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .SetIcon("res/actions/create24.png");
   extension.AddInstructionOrExpressionGroupMetadata(_("Movement using forces"))
       .SetIcon("res/actions/force24.png");
+  extension.AddInstructionOrExpressionGroupMetadata(_("Variables"))
+      .SetIcon("res/conditions/var24.png");
+  extension.AddInstructionOrExpressionGroupMetadata(_("Position"))
+      .SetIcon("res/actions/position24_black.png");
 
   gd::ObjectMetadata& obj = extension.AddObject<gd::ObjectConfiguration>(
       "", _("Base object"), _("Base object"), "res/objeticon24.png");
@@ -40,7 +44,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                    "res/conditions/position_black.png")
 
       .AddParameter("object", _("Object"))
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions())
       .MarkAsSimple();
 
   obj.AddAction("MettreX",
@@ -52,7 +57,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                 "res/actions/position_black.png")
 
       .AddParameter("object", _("Object"))
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters("number",
+                                     ParameterOptions::MakeNewOptions())
       .MarkAsSimple();
 
   obj.AddCondition("PosY",
@@ -64,7 +70,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                    "res/conditions/position_black.png")
 
       .AddParameter("object", _("Object"))
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions())
       .MarkAsSimple();
 
   obj.AddAction("MettreY",
@@ -76,7 +83,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                 "res/actions/position_black.png")
 
       .AddParameter("object", _("Object"))
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters("number",
+                                     ParameterOptions::MakeNewOptions())
       .MarkAsSimple();
 
   obj.AddAction("MettreXY",
@@ -120,7 +128,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
          _("Position/Center"),
          "res/actions/position24_black.png")
       .AddParameter("object", _("Object"))
-      .UseStandardParameters("number");
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions());
 
   obj.AddExpressionAndConditionAndAction(
          "number",
@@ -131,7 +139,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
          _("Position/Center"),
          "res/actions/position24_black.png")
       .AddParameter("object", _("Object"))
-      .UseStandardParameters("number");
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions());
 
   obj.AddExpressionAndCondition("number",
                                 "BoundingBoxLeft",
@@ -142,7 +150,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                                 _("Position/Bounding Box"),
                                 "res/conditions/bounding-box-left_black.svg")
       .AddParameter("object", _("Object"))
-      .UseStandardParameters("number");
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions());
 
   obj.AddExpressionAndCondition(
          "number",
@@ -153,7 +161,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
          _("Position/Bounding Box"),
          "res/conditions/bounding-box-top_black.svg")
       .AddParameter("object", _("Object"))
-      .UseStandardParameters("number");
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions());
 
   obj.AddExpressionAndCondition("number",
                                 "BoundingBoxRight",
@@ -164,7 +172,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                                 _("Position/Bounding Box"),
                                 "res/conditions/bounding-box-right_black.svg")
       .AddParameter("object", _("Object"))
-      .UseStandardParameters("number");
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions());
 
   obj.AddExpressionAndCondition("number",
                                 "BoundingBoxBottom",
@@ -175,7 +183,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                                 _("Position/Bounding Box"),
                                 "res/conditions/bounding-box-bottom_black.svg")
       .AddParameter("object", _("Object"))
-      .UseStandardParameters("number");
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions());
 
   obj.AddExpressionAndCondition("number",
                                 "BoundingBoxCenterX",
@@ -186,7 +194,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                                 _("Position/Bounding Box"),
                                 "res/conditions/bounding-box-center_black.svg")
       .AddParameter("object", _("Object"))
-      .UseStandardParameters("number");
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions());
 
   obj.AddExpressionAndCondition("number",
                                 "BoundingBoxCenterY",
@@ -197,7 +205,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                                 _("Position/Bounding Box"),
                                 "res/conditions/bounding-box-center_black.svg")
       .AddParameter("object", _("Object"))
-      .UseStandardParameters("number");
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions());
 
   obj.AddAction("MettreAutourPos",
                 _("Put around a position"),
@@ -226,7 +234,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                 "res/actions/direction_black.png")
 
       .AddParameter("object", _("Object"))
-      .UseStandardOperatorParameters("number");
+      .UseStandardOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Angle (in degrees)")));
 
   obj.AddAction("Rotate",
                 _("Rotate"),
@@ -382,7 +393,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                 "res/actions/planicon.png")
 
       .AddParameter("object", _("Object"))
-      .UseStandardOperatorParameters("number");
+      .UseStandardOperatorParameters("number",
+                                     ParameterOptions::MakeNewOptions());
 
   obj.AddAction("ChangeLayer",
                 _("Layer"),
@@ -398,8 +410,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .MarkAsAdvanced();
 
   obj.AddAction("ModVarObjet",
-                _("Value of an object variable"),
-                _("Change the value of an object variable."),
+                _("Change number variable"),
+                _("Modify the number value of an object variable."),
                 _("the variable _PARAM1_"),
                 _("Variables"),
                 "res/actions/var24.png",
@@ -407,11 +419,12 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
 
       .AddParameter("object", _("Object"))
       .AddParameter("objectvar", _("Variable"))
-      .UseStandardOperatorParameters("number");
+      .UseStandardOperatorParameters("number",
+                                     ParameterOptions::MakeNewOptions());
 
   obj.AddAction("ModVarObjetTxt",
-                _("Text of an object variable"),
-                _("Change the text of an object variable."),
+                _("Change text variable"),
+                _("Modify the text of an object variable."),
                 _("the text of variable _PARAM1_"),
                 _("Variables"),
                 "res/actions/var24.png",
@@ -419,11 +432,12 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
 
       .AddParameter("object", _("Object"))
       .AddParameter("objectvar", _("Variable"))
-      .UseStandardOperatorParameters("string");
+      .UseStandardOperatorParameters("string",
+                                     ParameterOptions::MakeNewOptions());
 
   obj.AddAction("SetObjectVariableAsBoolean",
-                _("Boolean value of an object variable"),
-                _("Change the boolean value of an object variable."),
+                _("Change boolean variable"),
+                _("Modify the boolean value of an object variable."),
                 _("Set the boolean value of variable _PARAM1_ of "
                   "_PARAM0_ to _PARAM2_"),
                 _("Variables"),
@@ -436,7 +450,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
 
   obj.AddAction(
          "ToggleObjectVariableAsBoolean",
-         _("Toggle the boolean value of an object variable"),
+         _("Toggle boolean variable"),
          _("Toggles the boolean value of an object variable.") + "\n" +
              _("If it was true, it will become false, and if it was false "
                "it will become true."),
@@ -451,37 +465,39 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
 
   obj.AddCondition("ObjectVariableChildExists",
                    _("Child existence"),
-                   _("Check if the specified child of the variable exists."),
+                   _("Check if the specified child of the object "
+                     "structure variable exists."),
                    _("Child _PARAM2_ of variable _PARAM1_ of _PARAM0_ exists"),
-                   _("Variables/Collections/Structures"),
+                   _("Variables/Arrays and structures"),
                    "res/conditions/var24.png",
                    "res/conditions/var.png")
       .AddParameter("object", _("Object"))
-      .AddParameter("objectvar", _("Variable"))
+      .AddParameter("objectvar", _("Structure variable"))
       .AddParameter("string", _("Name of the child"))
       .MarkAsAdvanced();
 
   obj.AddAction("ObjectVariableRemoveChild",
                 _("Remove a child"),
-                _("Remove a child from an object variable."),
+                _("Remove a child from an object structure variable."),
                 _("Remove child _PARAM2_ from variable _PARAM1_ of _PARAM0_"),
-                _("Variables/Collections/Structures"),
+                _("Variables/Arrays and structures"),
                 "res/actions/var24.png",
                 "res/actions/var.png")
       .AddParameter("object", _("Object"))
-      .AddParameter("objectvar", _("Variable"))
+      .AddParameter("objectvar", _("Structure variable"))
       .AddParameter("string", _("Child's name"))
       .MarkAsAdvanced();
 
   obj.AddAction("ObjectVariableClearChildren",
-                _("Clear variable"),
-                _("Remove all the children from the object variable."),
+                _("Clear children"),
+                _("Remove all the children from the object array or structure "
+                  "variable."),
                 _("Clear children from variable _PARAM1_ of _PARAM0_"),
-                _("Variables/Collections"),
+                _("Variables/Arrays and structures"),
                 "res/actions/var24.png",
                 "res/actions/var.png")
       .AddParameter("object", _("Object"))
-      .AddParameter("objectvar", _("Variable"))
+      .AddParameter("objectvar", _("Array or structure variable"))
       .MarkAsAdvanced();
 
   obj.AddAction("Cache",
@@ -516,7 +532,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                    "res/conditions/direction_black.png")
 
       .AddParameter("object", _("Object"))
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Angle to compare to (in degrees)")))
       .MarkAsAdvanced();
 
   obj.AddCondition("Plan",
@@ -528,7 +547,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                    "res/conditions/planicon.png")
 
       .AddParameter("object", _("Object"))
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   obj.AddCondition("Layer",
@@ -585,7 +605,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                    "res/conditions/vitesse.png")
 
       .AddParameter("object", _("Object"))
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   obj.AddCondition("AngleOfDisplacement",
@@ -604,8 +625,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .MarkAsAdvanced();
 
   obj.AddCondition("VarObjet",
-                   _("Value of an object variable"),
-                   _("Compare the value of an object variable."),
+                   _("Number variable"),
+                   _("Compare the number value of an object variable."),
                    _("the variable _PARAM1_"),
                    _("Variables"),
                    "res/conditions/var24.png",
@@ -613,10 +634,11 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
 
       .AddParameter("object", _("Object"))
       .AddParameter("objectvar", _("Variable"))
-      .UseStandardRelationalOperatorParameters("number");
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions());
 
   obj.AddCondition("VarObjetTxt",
-                   _("Text of an object variable"),
+                   _("Text variable"),
                    _("Compare the text of an object variable."),
                    _("the text of variable _PARAM1_"),
                    _("Variables"),
@@ -625,10 +647,11 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
 
       .AddParameter("object", _("Object"))
       .AddParameter("objectvar", _("Variable"))
-      .UseStandardRelationalOperatorParameters("string");
+      .UseStandardRelationalOperatorParameters(
+          "string", ParameterOptions::MakeNewOptions());
 
   obj.AddCondition("ObjectVariableAsBoolean",
-                   _("Boolean value of an object variable"),
+                   _("Boolean variable"),
                    _("Compare the boolean value of an object variable."),
                    _("The boolean value of variable _PARAM1_ of object "
                      "_PARAM0_ is _PARAM2_"),
@@ -642,7 +665,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
 
   obj.AddCondition("VarObjetDef",
                    "Variable defined",
-                   "Check if the variable is defined.",
+                   "Check if the object variable is defined.",
                    "Variable _PARAM1 of _PARAM0_ is defined",
                    _("Variables"),
                    "res/conditions/var24.png",
@@ -650,78 +673,131 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
 
       .AddParameter("object", _("Object"))
       .AddParameter("string", _("Variable"))
-      .SetHidden();
+      .SetHidden();  // Deprecated.
 
   obj.AddAction(
          "ObjectVariablePush",
-         _("Append variable to an object array"),
-         _("Appends a variable to the end of an object array variable."),
-         _("Append variable _PARAM2_ to array variable _PARAM1_ of _PARAM0_"),
-         _("Variables/Collections/Arrays"),
+         _("Add existing variable"),
+         _("Adds an existing variable to the end of an object array variable."),
+         _("Add variable _PARAM2_ to array variable _PARAM1_ of _PARAM0_"),
+         _("Variables/Arrays and structures"),
          "res/actions/var24.png",
          "res/actions/var.png")
       .AddParameter("object", _("Object"))
       .AddParameter("objectvar", _("Array variable"))
-      .AddParameter("scenevar", _("Scene variable with the content to append"))
-      .SetParameterLongDescription(
-          _("The content of the variable will *be copied* and appended at the "
+      .AddParameter("scenevar", _("Scene variable with the content to add"))
+      .SetParameterLongDescription(_("The content of the object variable will "
+                                     "*be copied* and added at the "
                                      "end of the array."))
       .MarkAsAdvanced();
 
   obj.AddAction(
          "ObjectVariablePushString",
-         _("Append a string to an object array"),
-         _("Appends a string to the end of an object array variable."),
-         _("Append string _PARAM2_ to array variable _PARAM1_ of _PARAM0_"),
-         _("Variables/Collections/Arrays"),
+         _("Add text variable"),
+         _("Adds a text (string) to the end of an object array variable."),
+         _("Add text _PARAM2_ to array variable _PARAM1_ of _PARAM0_"),
+         _("Variables/Arrays and structures"),
          "res/actions/var24.png",
          "res/actions/var.png")
       .AddParameter("object", _("Object"))
       .AddParameter("objectvar", _("Array variable"))
-      .AddParameter("string", _("String to append"))
+      .AddParameter("string", _("Text to add"))
       .MarkAsAdvanced();
 
-  obj.AddAction(
-         "ObjectVariablePushNumber",
-         _("Append a number to an object array"),
-         _("Appends a number to the end of an object array variable."),
-         _("Append number _PARAM2_ to array variable _PARAM1_ of _PARAM0_"),
-         _("Variables/Collections/Arrays"),
+  obj.AddAction("ObjectVariablePushNumber",
+                _("Add number variable"),
+                _("Adds a number to the end of an object array variable."),
+                _("Add number _PARAM2_ to array variable _PARAM1_ of _PARAM0_"),
+                _("Variables/Arrays and structures"),
                 "res/actions/var24.png",
                 "res/actions/var.png")
       .AddParameter("object", _("Object"))
       .AddParameter("objectvar", _("Array variable"))
-      .AddParameter("expression", _("Number to append"))
+      .AddParameter("expression", _("Number to add"))
       .MarkAsAdvanced();
 
   obj.AddAction(
          "ObjectVariablePushBool",
-         _("Append a boolean to an object array"),
-         _("Appends a boolean to the end of an object array variable."),
-         _("Append boolean _PARAM2_ to array variable _PARAM1_ of _PARAM0_"),
-         _("Variables/Collections/Arrays"),
+         _("Add boolean variable"),
+         _("Adds a boolean to the end of an object array variable."),
+         _("Add boolean _PARAM2_ to array variable _PARAM1_ of _PARAM0_"),
+         _("Variables/Arrays and structures"),
          "res/actions/var24.png",
          "res/actions/var.png")
       .AddParameter("object", _("Object"))
       .AddParameter("objectvar", _("Array variable"))
-      .AddParameter("trueorfalse", _("Boolean to append"))
+      .AddParameter("trueorfalse", _("Boolean to add"))
       .MarkAsAdvanced();
 
   obj.AddAction(
          "ObjectVariableRemoveAt",
-         _("Remove variable from an object array (by index)"),
+         _("Remove variable by index"),
          _("Removes a variable at the specified index of an object array "
            "variable."),
          _("Remove variable at index _PARAM2_ from array variable _PARAM1_ of "
            "_PARAM0_"),
-         _("Variables/Collections/Arrays"),
+         _("Variables/Arrays and structures"),
          "res/actions/var24.png",
          "res/actions/var.png")
       .AddParameter("object", _("Object"))
-      .AddParameter("objectvar", _("Variable"))
+      .AddParameter("objectvar", _("Array variable"))
       .AddParameter("expression", _("Index to remove"))
       .MarkAsAdvanced();
 
+  obj.AddCondition(
+         "ObjectVariableChildCount",
+         _("Number of children"),
+         _("Compare the number of children in an object array variable."),
+         _("The number of children in the array variable _PARAM1_"),
+         _("Variables/Arrays and structures"),
+         "res/conditions/var24.png",
+         "res/conditions/var.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("objectvar", _("Variable"))
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions())
+      .MarkAsAdvanced();
+
+  obj.AddStrExpression(
+         "ArrayVariableFirstString",
+         _("First text child"),
+         _("Get the value of the first element of an object array variable, if "
+           "it is a text (string) variable."),
+         _("Variables/Arrays and structures"),
+         "res/actions/var.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("objectvar", _("Array variable"));
+
+  obj.AddExpression(
+         "ArrayVariableFirstNumber",
+         _("First number child"),
+         _("Get the value of the first element of an object array variable, if "
+           "it is a number variable."),
+         _("Variables/Arrays and structures"),
+         "res/actions/var.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("objectvar", _("Array variable"));
+
+  obj.AddStrExpression(
+         "ArrayVariableLastString",
+         _("Last text child"),
+         _("Get the value of the last element of an object array variable, if "
+           "it is a text (string) variable."),
+         _("Variables/Arrays and structures"),
+         "res/actions/var.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("objectvar", _("Array variable"));
+
+  obj.AddExpression(
+         "ArrayVariableLastNumber",
+         _("Last number child"),
+         _("Get the value of the last element of an object array variable, if "
+           "it is a number variable."),
+         _("Variables/Arrays and structures"),
+         "res/actions/var.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("objectvar", _("Array variable"));
+
   obj.AddCondition("BehaviorActivated",
                    _("Behavior activated"),
                    _("Check if the behavior is activated for the object."),
@@ -886,7 +962,7 @@ 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 +976,7 @@ 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 +989,7 @@ 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 +1002,7 @@ 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 +1012,7 @@ 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 +1023,7 @@ 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",
@@ -958,7 +1034,7 @@ 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")
       .MarkAsAdvanced();
 
   obj.AddExpression("X",
@@ -1098,23 +1174,24 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .AddParameter("expression", _("Target Y position"));
 
   obj.AddExpression("Variable",
-                    _("Value of an object variable"),
-                    _("Value of an object variable"),
+                    _("Number variable"),
+                    _("Number value of an object variable"),
                     _("Variables"),
                     "res/actions/var.png")
       .AddParameter("object", _("Object"))
       .AddParameter("objectvar", _("Variable"));
 
-  obj.AddExpression("VariableChildCount",
-                    _("Number of children of an object variable"),
-                    _("Number of children of an object variable"),
-                    _("Variables"),
+  obj.AddExpression(
+         "VariableChildCount",
+         _("Number of children"),
+         _("Number of children in an object array or structure variable"),
+         _("Variables/Arrays and structures"),
          "res/actions/var.png")
       .AddParameter("object", _("Object"))
-      .AddParameter("objectvar", _("Variable"));
+      .AddParameter("objectvar", _("Array or structure variable"));
 
   obj.AddStrExpression("VariableString",
-                       _("Text of an object variable"),
+                       _("Text variable"),
                        _("Text of an object variable"),
                        _("Variables"),
                        "res/actions/var.png")
@@ -1127,7 +1204,7 @@ 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"),
@@ -1248,6 +1325,17 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .MarkAsSimple()
       .SetRequiresBaseObjectCapability("effect");
 
+  obj.AddAction("SetIncludedInParentCollisionMask",
+                _("Include in parent collision mask"),
+                _("Include or exclude a child from its parent collision mask."),
+                _("Include _PARAM0_ in parent object collision mask: _PARAM1_"),
+                _("Collision"),
+                "res/function32.png",
+                "res/function32.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("yesorno", "Include in parent collision mask")
+      .SetRelevantForCustomObjectEventsOnly();
+
   extension
       .AddAction("Create",
                  _("Create an object"),
@@ -1276,7 +1364,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                  "res/actions/create24.png",
                  "res/actions/create24.png")
       .AddCodeOnlyParameter("objectsContext", "")
-      .AddParameter("objectListOrEmptyIfJustDeclared", _("Group of potential objects"))
+      .AddParameter("objectListOrEmptyIfJustDeclared",
+                    _("Group of potential objects"))
       .SetParameterLongDescription(
           _("Group containing objects that can be created by the action."))
       .AddParameter("string", _("Name of the object to create"))
@@ -1423,33 +1512,38 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
           "res/conditions/nbObjet24.png",
           "res/conditions/nbObjet.png")
       .AddParameter("objectList", _("Object"))
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions())
       .MarkAsSimple()
       .SetHidden();
 
-  extension.AddExpressionAndCondition(
+  extension
+      .AddExpressionAndCondition(
           "number",
           "SceneInstancesCount",
           _("Number of object instances on the scene"),
-      _("the number of instances of the specified objects living on the scene"),
+          _("the number of instances of the specified objects living on the "
+            "scene"),
           _("the number of _PARAM1_ living on the scene"),
           _("Objects"),
           "res/conditions/nbObjet24.png")
       .AddCodeOnlyParameter("objectsContext", "")
       .AddParameter("objectListOrEmptyWithoutPicking", _("Object"))
-    .UseStandardParameters("number")
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
       .MarkAsSimple();
 
-  extension.AddExpressionAndCondition(
+  extension
+      .AddExpressionAndCondition(
           "number",
           "PickedInstancesCount",
           _("Number of object instances currently picked"),
-      _("the number of instances picked by the previous conditions (or actions)"),
+          _("the number of instances picked by the previous conditions (or "
+            "actions)"),
           _("the number of _PARAM0_ currently picked"),
           _("Objects"),
           "res/conditions/nbObjet24.png")
       .AddParameter("objectListOrEmptyWithoutPicking", _("Object"))
-    .UseStandardParameters("number")
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
       .MarkAsSimple();
 
   extension

Core/GDCore/Extensions/Builtin/CameraExtension.cpp

@@ -22,9 +22,12 @@ 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");
+  extension.AddInstructionOrExpressionGroupMetadata(_("Effects"))
+      .SetIcon("res/actions/effect24.png");
 
   extension
       .AddExpressionAndConditionAndAction(
@@ -36,7 +39,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
           "",
           "res/conditions/camera24.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .UseStandardParameters("number")
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
       .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number (default : 0)"), "", true)
@@ -68,7 +71,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
           "",
           "res/conditions/camera24.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .UseStandardParameters("number")
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
       .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number (default : 0)"), "", true)
@@ -103,7 +106,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
       .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number"), "", true)
-      .UseStandardParameters("number")
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   extension
@@ -119,7 +122,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
       .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number"), "", true)
-      .UseStandardParameters("number")
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   extension
@@ -136,7 +139,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
       .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number"), "", true)
-      .UseStandardParameters("number")
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   extension
@@ -153,7 +156,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
       .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number"), "", true)
-      .UseStandardParameters("number")
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   extension
@@ -170,7 +173,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
       .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number"), "", true)
-      .UseStandardParameters("number")
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   extension
@@ -187,7 +190,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
       .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number"), "", true)
-      .UseStandardParameters("number")
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   extension
@@ -200,7 +203,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
           "",
           "res/conditions/camera24.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .UseStandardParameters("number")
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
       .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number (default : 0)"), "", true)
@@ -452,8 +455,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                 "names) in the effects window."),
           _("Set _PARAM3_ to _PARAM4_ for effect _PARAM2_ of layer _PARAM1_"),
           _("Effects"),
-          "res/conditions/camera24.png",
-          "res/conditions/camera.png")
+          "res/actions/effect24.png",
+          "res/actions/effect.png")
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
       .SetDefaultValue("\"\"")
@@ -471,8 +474,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                 "names) in the effects window."),
           _("Set _PARAM3_ to _PARAM4_ for effect _PARAM2_ of layer _PARAM1_"),
           _("Effects"),
-          "res/conditions/camera24.png",
-          "res/conditions/camera.png")
+          "res/actions/effect24.png",
+          "res/actions/effect.png")
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
       .SetDefaultValue("\"\"")
@@ -490,8 +493,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                 "names) in the effects window."),
           _("Enable _PARAM3_ for effect _PARAM2_ of layer _PARAM1_: _PARAM4_"),
           _("Effects"),
-          "res/conditions/camera24.png",
-          "res/conditions/camera.png")
+          "res/actions/effect24.png",
+          "res/actions/effect.png")
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
       .SetDefaultValue("\"\"")
@@ -505,9 +508,9 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                     _("Layer effect is enabled"),
                     _("The effect on a layer is enabled"),
                     _("Effect _PARAM2_ on layer _PARAM1_ is enabled"),
-                    _("Effects"),
-                    "res/conditions/camera24.png",
-                    "res/conditions/camera.png")
+                    _(""),
+                    "res/actions/effect24.png",
+                    "res/actions/effect.png")
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
       .SetDefaultValue("\"\"")
@@ -520,8 +523,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                  _("Enable an effect on a layer"),
                  _("Enable effect _PARAM2_ on layer _PARAM1_: _PARAM3_"),
                  _("Effects"),
-                 "res/conditions/camera24.png",
-                 "res/conditions/camera.png")
+                 "res/actions/effect24.png",
+                 "res/actions/effect.png")
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
       .SetDefaultValue("\"\"")
@@ -541,7 +544,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
       .SetDefaultValue("\"\"")
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number",
+          gd::ParameterOptions::MakeNewOptions().SetDescription(
+              _("Time scale (1 by default)")))
       .MarkAsAdvanced();
 
   extension
@@ -571,7 +577,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
       .SetDefaultValue("\"\"")
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number", gd::ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   extension
@@ -596,7 +603,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
           _("Set the ambient light color of the lighting layer in format "
             "\"R;G;B\" string."),
           _("Set the ambient color of the lighting layer _PARAM1_ to _PARAM2_"),
-          _("Lighting"),
+          _(""),
           "res/actions/color24.png",
           "res/actions/color.png")
       .AddCodeOnlyParameter("currentScene", "")

Core/GDCore/Extensions/Builtin/CommonConversionsExtension.cpp

@@ -96,7 +96,7 @@ BuiltinExtensionsImplementer::ImplementsCommonConversionsExtension(
           "JSONToVariableStructure",
           _("Convert JSON to a scene variable"),
           _("Parse a JSON object and store it into a scene variable"),
-          _("Parse JSON string _PARAM0_ and store it into variable _PARAM1_"),
+          _("Convert JSON string _PARAM0_ and store it into variable _PARAM1_"),
           "",
           "res/actions/net24.png",
           "res/actions/net.png")
@@ -108,7 +108,7 @@ BuiltinExtensionsImplementer::ImplementsCommonConversionsExtension(
       .AddAction("JSONToGlobalVariableStructure",
                  _("Convert JSON to global variable"),
                  _("Parse a JSON object and store it into a global variable"),
-                 _("Parse JSON string _PARAM0_ and store it into global "
+                 _("Convert JSON string _PARAM0_ and store it into global "
                    "variable _PARAM1_"),
                  "",
                  "res/actions/net24.png",

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

@@ -492,6 +492,16 @@ BuiltinExtensionsImplementer::ImplementsMathematicalToolsExtension(
                      "",
                      "res/mathfunction.png")
       .SetHelpPath("/all-features/expressions");
+
+  extension
+      .AddExpression("lerpAngle",
+                     _("Lerp (Linear interpolation) between two angles"),
+                     _("Linearly interpolates between two angles (in degrees) by taking the shortest direction around the circle."),
+                     "",
+                     "res/mathfunction.png")
+      .AddParameter("expression", _("Starting angle, in degrees"))
+      .AddParameter("expression", _("Destination angle, in degrees"))
+      .AddParameter("expression", _("Interpolation value between 0 and 1."));
 }
 
 }  // namespace gd

Core/GDCore/Extensions/Builtin/MouseExtension.cpp

@@ -27,6 +27,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsMouseExtension(
       .SetCategory("Input");
   extension.AddInstructionOrExpressionGroupMetadata(_("Mouse and touch"))
       .SetIcon("res/actions/mouse24.png");
+  extension.AddInstructionOrExpressionGroupMetadata(_("Multitouch"))
+      .SetIcon("res/conditions/touch24.png");
 
   extension
       .AddCondition(
@@ -153,42 +155,80 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsMouseExtension(
   extension
       .AddExpressionAndCondition(
           "number",
-          "MouseX",
+          "CursorX",
           _("Cursor X position"),
           _("the X position of the cursor or of a touch"),
           _("the cursor (or touch) X position"),
           "",
           "res/conditions/mouse24.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .UseStandardParameters("number")
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
       .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number (default : 0)"), "", true)
       .SetDefaultValue("0");
 
   // Support for deprecated names:
-  extension.AddDuplicatedCondition("SourisX", "MouseX").SetHidden();
-  extension.AddDuplicatedExpression("SourisX", "MouseX").SetHidden();
+  extension.AddDuplicatedCondition("MouseX", "CursorX").SetHidden();
+  extension.AddDuplicatedExpression("MouseX", "CursorX").SetHidden();
+  extension.AddDuplicatedCondition("SourisX", "CursorX").SetHidden();
+  extension.AddDuplicatedExpression("SourisX", "CursorX").SetHidden();
 
   extension
       .AddExpressionAndCondition(
           "number",
-          "MouseY",
+          "CursorY",
           _("Cursor Y position"),
           _("the Y position of the cursor or of a touch"),
           _("the cursor (or touch) Y position"),
           "",
           "res/conditions/mouse24.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .UseStandardParameters("number")
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
       .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number (default : 0)"), "", true)
       .SetDefaultValue("0");
 
   // Support for deprecated names:
-  extension.AddDuplicatedCondition("SourisY", "MouseY").SetHidden();
-  extension.AddDuplicatedExpression("SourisY", "MouseY").SetHidden();
+  extension.AddDuplicatedCondition("MouseY", "CursorY").SetHidden();
+  extension.AddDuplicatedExpression("MouseY", "CursorY").SetHidden();
+  extension.AddDuplicatedCondition("SourisY", "CursorY").SetHidden();
+  extension.AddDuplicatedExpression("SourisY", "CursorY").SetHidden();
+
+  extension
+      .AddExpressionAndCondition("number",
+                                 "MouseOnlyCursorX",
+                                 _("Mouse cursor X position"),
+                                 _("the X position of the mouse cursor"),
+                                 _("the mouse cursor X position"),
+                                 "",
+                                 "res/conditions/mouse24.png")
+      .AddCodeOnlyParameter("currentScene", "")
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
+      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .SetDefaultValue("\"\"")
+      .AddParameter("expression", _("Camera number (default : 0)"), "", true)
+      .SetDefaultValue("0")
+      // It's only useful for extensions as they can't use TouchSimulateMouse.
+      .SetHidden();
+
+  extension
+      .AddExpressionAndCondition("number",
+                                 "MouseOnlyCursorY",
+                                 _("Mouse cursor Y position"),
+                                 _("the Y position of the mouse cursor"),
+                                 _("the mouse cursor Y position"),
+                                 "",
+                                 "res/conditions/mouse24.png")
+      .AddCodeOnlyParameter("currentScene", "")
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
+      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .SetDefaultValue("\"\"")
+      .AddParameter("expression", _("Camera number (default : 0)"), "", true)
+      .SetDefaultValue("0")
+      // It's only useful for extensions as they can't use TouchSimulateMouse.
+      .SetHidden();
 
   extension
       .AddCondition("IsMouseInsideCanvas",
@@ -276,7 +316,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsMouseExtension(
                                  "res/conditions/touch24.png")
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("expression", _("Touch identifier"))
-      .UseStandardParameters("number")
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
       .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number (default : 0)"), "", true)
@@ -292,7 +332,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsMouseExtension(
                                  "res/conditions/touch24.png")
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("expression", _("Touch identifier"))
-      .UseStandardParameters("number")
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
       .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number (default : 0)"), "", true)
@@ -334,40 +374,81 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsMouseExtension(
       .AddCondition(
           "HasAnyTouchStarted",
           _("A new touch has started"),
-          _("Check if a touch has just started on this frame. The touch identifiers can be "
+          _("Check if a touch has just started on this frame. The touch "
+            "identifiers can be "
             "accessed using StartedTouchId() and StartedTouchCount()."),
           _("A new touch has started"),
           _("Multitouch"),
           "res/conditions/touch24.png",
           "res/conditions/touch.png")
+      .AddCodeOnlyParameter("currentScene", "")
+      .SetHidden();
+
+  extension
+      .AddExpression("StartedTouchCount",
+                     _("Started touch count"),
+                     _("The number of touches that have just started on this "
+                       "frame. The touch identifiers can be "
+                       "accessed using StartedTouchId()."),
+                     _("Multitouch"),
+                     "res/conditions/touch.png")
+      .AddCodeOnlyParameter("currentScene", "")
+      .SetHidden();
+
+  extension
+      .AddExpression("StartedTouchId",
+                     _("Started touch identifier"),
+                     _("The identifier of the touch that has just started on "
+                       "this frame. The number of touches can be "
+                       "accessed using StartedTouchCount()."),
+                     _("Multitouch"),
+                     "res/conditions/touch.png")
+      .AddCodeOnlyParameter("currentScene", "")
+      .AddParameter("expression", _("Touch index"))
+      .SetHidden();
+
+  extension
+      .AddCondition(
+          "HasAnyTouchOrMouseStarted",
+          _("A new touch has started"),
+          _("Check if a touch has just started or the mouse left button has "
+            "been pressed on this frame. The touch identifiers can be "
+            "accessed using StartedTouchOrMouseId() and "
+            "StartedTouchOrMouseCount()."),
+          _("A new touch has started"),
+          _("Multitouch"),
+          "res/conditions/touch24.png",
+          "res/conditions/touch.png")
       .AddCodeOnlyParameter("currentScene", "");
 
   extension
       .AddExpression(
-          "StartedTouchCount",
+          "StartedTouchOrMouseCount",
           _("Started touch count"),
-          _("The number of touches that have just started on this frame. The touch identifiers can be "
-            "accessed using StartedTouchId()."),
+          _("The number of touches (including the mouse) that have just "
+            "started on this frame. The touch identifiers can be "
+            "accessed using StartedTouchOrMouseId()."),
           _("Multitouch"),
           "res/conditions/touch.png")
       .AddCodeOnlyParameter("currentScene", "");
 
   extension
       .AddExpression(
-          "StartedTouchId",
+          "StartedTouchOrMouseId",
           _("Started touch identifier"),
-          _("The identifier of the touch that has just started on this frame. The touch number of touches can be "
-            "accessed using StartedTouchCount()."),
+          _("The identifier of the touch or mouse that has just started on "
+            "this frame. The number of touches can be "
+            "accessed using StartedTouchOrMouseCount()."),
           _("Multitouch"),
           "res/conditions/touch.png")
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("expression", _("Touch index"));
 
   extension
-      .AddCondition(
-          "HasTouchEnded",
+      .AddCondition("HasTouchEnded",
                     _("A touch has ended"),
-          _("Check if a touch has ended."),
+                    _("Check if a touch has ended or a mouse left button has "
+                      "been released."),
                     _("The touch with identifier _PARAM1_ has ended"),
                     _("Multitouch"),
                     "res/conditions/touch24.png",

Core/GDCore/Extensions/Builtin/SceneExtension.cpp

@@ -136,6 +136,20 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSceneExtension(
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("yesorno", _("Deactivate input when focus is lost"))
       .MarkAsAdvanced();
+
+  extension
+      .AddCondition(
+          "HasGameJustResumed",
+          _("Game has just resumed"),
+          _("Check if the game has just resumed from being hidden. It "
+            "happens when the game tab is selected, a minimized window is "
+            "restored or the application is put back on front."),
+          _("Game has just resumed"),
+          "",
+          "res/actions/window24.png",
+          "res/actions/window.png")
+      .SetHelpPath("/interface/scene-editor/events")
+      .AddCodeOnlyParameter("currentScene", "");
 }
 
 }  // namespace gd

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

@@ -31,7 +31,7 @@ class GD_CORE_API Point {
   /**
    * Change point position.
    */
-  void SetXY(float x_, float y_) {
+  void SetXY(double x_, double y_) {
     x = x_;
     y = y_;
   }
@@ -39,27 +39,27 @@ class GD_CORE_API Point {
   /**
    * Change point X position.
    */
-  void SetX(float x_) { x = x_; }
+  void SetX(double x_) { x = x_; }
 
   /**
    * Change point Y position.
    */
-  void SetY(float y_) { y = y_; }
+  void SetY(double y_) { y = y_; }
 
   /**
    * Get point X position.
    */
-  float GetX() const { return x; }
+  double GetX() const { return x; }
 
   /**
    * Get point Y position.
    */
-  float GetY() const { return y; }
+  double GetY() const { return y; }
 
  private:
   gd::String name;
-  float x;
-  float y;
+  double x;
+  double y;
 };
 
 #endif  // GDCORE_POINT_H

Core/GDCore/Extensions/Builtin/SpriteExtension/Polygon2d.cpp

@@ -4,12 +4,14 @@
  * reserved. This project is released under the MIT License.
  */
 #include "Polygon2d.h"
-#include "GDCore/Vector2.h"
+
 #include <cmath>
 #include <iostream>
 
-void Polygon2d::Rotate(float angle) {
-  float t, cosa = cos(-angle),
+#include "GDCore/Vector2.h"
+
+void Polygon2d::Rotate(double angle) {
+  double t, cosa = cos(-angle),
             sina = sin(-angle);  // We want a clockwise rotation
 
   for (std::size_t i = 0; i < vertices.size(); ++i) {
@@ -19,7 +21,7 @@ void Polygon2d::Rotate(float angle) {
   }
 }
 
-void Polygon2d::Move(float x, float y) {
+void Polygon2d::Move(double x, double y) {
   for (std::size_t i = 0; i < vertices.size(); i++) {
     vertices[i].x += x;
     vertices[i].y += y;
@@ -50,12 +52,12 @@ bool Polygon2d::IsConvex() const {
       (edges[0].x * edges[0 + 1].y - edges[0].y * edges[0 + 1].x) > 0;
 
   for (std::size_t i = 1; i < edges.size() - 1; ++i) {
-    float zCrossProduct =
+    double zCrossProduct =
         edges[i].x * edges[i + 1].y - edges[i].y * edges[i + 1].x;
     if ((zCrossProduct > 0) != zProductIsPositive) return false;
   }
 
-  float lastZCrossProduct = edges[edges.size() - 1].x * edges[0].y -
+  double lastZCrossProduct = edges[edges.size() - 1].x * edges[0].y -
                              edges[edges.size() - 1].y * edges[0].x;
   if ((lastZCrossProduct > 0) != zProductIsPositive) return false;
 
@@ -75,7 +77,7 @@ gd::Vector2f Polygon2d::ComputeCenter() const {
   return center;
 }
 
-Polygon2d Polygon2d::CreateRectangle(float width, float height) {
+Polygon2d Polygon2d::CreateRectangle(double width, double height) {
   Polygon2d rect;
   rect.vertices.push_back(gd::Vector2f(-width / 2.0f, -height / 2.0f));
   rect.vertices.push_back(gd::Vector2f(+width / 2.0f, -height / 2.0f));

Core/GDCore/Extensions/Builtin/SpriteExtension/Polygon2d.h

@@ -5,9 +5,10 @@
  */
 #ifndef GDCORE_POLYGON_H
 #define GDCORE_POLYGON_H
-#include "GDCore/Vector2.h"
 #include <vector>
 
+#include "GDCore/Vector2.h"
+
 /**
  * \brief Represents a polygon. Usually used for collisions masks.
  *
@@ -42,7 +43,7 @@ class GD_CORE_API Polygon2d {
    * \note Edges are updated, there is no need to call ComputeEdges after
    * calling Move.
    */
-  void Move(float x, float y);
+  void Move(double x, double y);
 
   /**
    * \brief Rotate the polygon.
@@ -52,7 +53,7 @@ class GD_CORE_API Polygon2d {
    * \warning edges vector is not updated, you have to call ComputeEdges if
    * needed.
    */
-  void Rotate(float angle);
+  void Rotate(double angle);
 
   /**
    * \brief Automatically fill edges vector using vertices.
@@ -77,7 +78,7 @@ class GD_CORE_API Polygon2d {
   /**
    * \brief Create a rectangle
    */
-  static Polygon2d CreateRectangle(float width, float height);
+  static Polygon2d CreateRectangle(double width, double height);
   ///@}
 };
 

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
@@ -42,7 +44,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                 "res/actions/opacity.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Opacity (0-255)")))
       .MarkAsSimple();
 
   obj.AddAction("ChangeAnimation",
@@ -55,7 +60,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                 "res/actions/animation.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters("number",
+                                     ParameterOptions::MakeNewOptions())
       .MarkAsSimple();
 
   obj.AddAction("SetAnimationName",
@@ -84,7 +90,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
       .SetHidden()  // Hide as 8 direction is not supported officially in the
                     // interface.
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters("number",
+                                     ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   obj.AddAction("ChangeSprite",
@@ -96,7 +103,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                 "res/actions/sprite.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters("number",
+                                     ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   obj.AddAction("PauseAnimation",
@@ -132,7 +140,9 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
          "res/actions/animation.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(_("Speed scale")))
       .MarkAsSimple();
 
   obj.AddAction("TourneVersPos",
@@ -160,7 +170,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                 "res/actions/scale_black.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Scale (1 by default)")))
       .MarkAsAdvanced();
 
   obj.AddAction("ChangeScaleWidth",
@@ -172,7 +185,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                 "res/actions/scaleWidth_black.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Scale (1 by default)")))
       .MarkAsAdvanced();
 
   obj.AddAction("ChangeScaleHeight",
@@ -184,7 +200,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                 "res/actions/scaleHeight_black.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Scale (1 by default)")))
       .MarkAsAdvanced();
 
   obj.AddAction("ChangeWidth",
@@ -196,7 +215,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                 "res/actions/scaleWidth_black.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters("number",
+                                     ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   obj.AddCondition("Width",
@@ -208,7 +228,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                    "res/conditions/scaleWidth_black.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   obj.AddAction("ChangeHeight",
@@ -220,7 +241,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                 "res/actions/scaleHeight_black.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters("number",
+                                     ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   obj.AddCondition("Height",
@@ -232,7 +254,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                    "res/conditions/scaleHeight_black.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   obj.AddAction("SetSize",
@@ -258,7 +281,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
          "res/conditions/animation.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   obj.AddCondition("AnimationName",
@@ -286,7 +310,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
       .SetHidden()  // Hide as 8 direction is not supported officially in the
                     // interface.
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardRelationalOperatorParameters("number");
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions());
 
   obj.AddCondition("Sprite",
                    _("Current frame"),
@@ -299,7 +324,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                    "res/conditions/sprite.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   obj.AddCondition("AnimStopped",
@@ -322,6 +348,19 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                    "res/conditions/animation24.png",
                    "res/conditions/animation.png")
 
+      .AddParameter("object", _("Object"), "Sprite")
+      .MarkAsSimple()
+      .SetHidden();
+
+  obj.AddCondition("AnimationEnded2",
+                   _("Animation finished"),
+                   _("Check if the animation being played by the Sprite object "
+                     "is finished."),
+                   _("The animation of _PARAM0_ is finished"),
+                   _("Animations and images"),
+                   "res/conditions/animation24.png",
+                   "res/conditions/animation.png")
+
       .AddParameter("object", _("Object"), "Sprite")
       .MarkAsSimple();
 
@@ -334,7 +373,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                    "res/conditions/scaleWidth_black.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Scale (1 by default)")))
       .MarkAsAdvanced();
 
   obj.AddCondition("ScaleHeight",
@@ -346,7 +388,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                    "res/conditions/scaleHeight_black.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Scale (1 by default)")))
       .MarkAsAdvanced();
 
   obj.AddCondition("Opacity",
@@ -359,7 +404,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                    "res/conditions/opacity.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Opacity to compare to (0-255)")))
       .MarkAsSimple();
 
   obj.AddCondition(
@@ -372,7 +420,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
          "res/conditions/opacity.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   obj.AddAction("ChangeColor",
@@ -534,7 +583,14 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
 
   obj.AddExpression("Sprite",
                     _("Image"),
-                    _("Animation frame of the object"),
+                    _("Current frame of the animation of the object"),
+                    _("Animations and images"),
+                    "res/actions/sprite.png")
+      .AddParameter("object", _("Object"), "Sprite");
+
+  obj.AddExpression("AnimationFrameCount",
+                    _("Number of frames"),
+                    _("Number of frames in the current animation of the object"),
                     _("Animations and images"),
                     "res/actions/sprite.png")
       .AddParameter("object", _("Object"), "Sprite");

Core/GDCore/Extensions/Builtin/StringInstructionsExtension.cpp

@@ -183,6 +183,26 @@ BuiltinExtensionsImplementer::ImplementsStringInstructionsExtension(
                     _("Position of the last character in the string to be "
                       "considered in the search"));
 
+  extension
+      .AddStrExpression("StrReplaceOne",
+                        _("Replace the first occurrence of a text by another."),
+                        _("Replace the first occurrence of a text by another."),
+                        "",
+                        "res/conditions/toujours24_black.png")
+      .AddParameter("string", _("Text in which the replacement must be done"))
+      .AddParameter("string", _("Text to find inside the first text"))
+      .AddParameter("string", _("Replacement to put instead of the text to find"));
+
+  extension
+      .AddStrExpression("StrReplaceAll",
+                        _("Replace all occurrences of a text by another."),
+                        _("Replace all occurrences of a text by another."),
+                        "",
+                        "res/conditions/toujours24_black.png")
+      .AddParameter("string", _("Text in which the replacement(s) must be done"))
+      .AddParameter("string", _("Text to find inside the first text"))
+      .AddParameter("string", _("Replacement to put instead of the text to find"));
+
 }
 
 }  // namespace gd

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");
@@ -65,7 +65,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsTimeExtension(
                     "res/conditions/time24.png",
                     "res/conditions/time.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number",
+          gd::ParameterOptions::MakeNewOptions().SetDescription(
+              _("Time scale (1 by default)")))
       .MarkAsAdvanced();
 
   extension
@@ -78,7 +81,7 @@ 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 +96,7 @@ 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 +108,7 @@ 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 +121,7 @@ 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
@@ -131,7 +134,7 @@ 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")
       .MarkAsAdvanced();
 
   extension
@@ -148,14 +151,14 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsTimeExtension(
 
   extension
       .AddAction("Wait",
-                 _("Wait X seconds (experimental)"),
+                 _("Wait X seconds"),
                  _("Waits a number of seconds before running "
                    "the next actions (and sub-events)."),
                  _("Wait _PARAM0_ seconds"),
                  "",
                  "res/timer_black.svg",
                  "res/timer_black.svg")
-      .AddParameter("expression", "Time to wait in seconds")
+      .AddParameter("expression", _("Time to wait in seconds"))
       .SetHelpPath("/all-features/timers-and-time/wait-action");
 
   extension
@@ -191,7 +194,7 @@ 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/VariablesExtension.cpp

@@ -27,30 +27,32 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
 
   extension
       .AddCondition("VarScene",
-                    _("Value of a scene variable"),
-                    _("Compare the value of a scene variable."),
-                    _("the scene variable _PARAM0_"),
+                    _("Number variable"),
+                    _("Compare the number value of a scene variable."),
+                    _("The number of scene variable _PARAM0_"),
                     _("Scene variables"),
                     "res/conditions/var24.png",
                     "res/conditions/var.png")
       .AddParameter("scenevar", _("Variable"))
-      .UseStandardRelationalOperatorParameters("number");
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions());
 
   extension
       .AddCondition("VarSceneTxt",
-                    _("Text of a scene variable"),
-                    _("Compare the text of a scene variable."),
-                    _("the text of scene variable _PARAM0_"),
+                    _("Text variable"),
+                    _("Compare the text (string) of a scene variable."),
+                    _("The text of scene variable _PARAM0_"),
                     _("Scene variables"),
                     "res/conditions/var24.png",
                     "res/conditions/var.png")
       .AddParameter("scenevar", _("Variable"))
-      .UseStandardRelationalOperatorParameters("string");
+      .UseStandardRelationalOperatorParameters(
+          "string", ParameterOptions::MakeNewOptions());
 
   extension
       .AddCondition(
           "SceneVariableAsBoolean",
-          _("Boolean value of a scene variable"),
+          _("Boolean variable"),
           _("Compare the boolean value of a scene variable."),
           _("The boolean value of scene variable _PARAM0_ is _PARAM1_"),
           _("Scene variables"),
@@ -61,12 +63,12 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
       .SetDefaultValue("true");
 
   extension
-      .AddCondition(
-          "VariableChildExists",
+      .AddCondition("VariableChildExists",
                     _("Child existence"),
-          _("Check if the specified child of the scene variable exists."),
+                    _("Check if the specified child of the scene structure "
+                      "variable exists."),
                     _("Child _PARAM1_ of scene variable _PARAM0_ exists"),
-          _("Scene variables/Collections/Structures"),
+                    _("Scene variables/Arrays and structures"),
                     "res/conditions/var24.png",
                     "res/conditions/var.png")
       .AddParameter("scenevar", _("Variable"))
@@ -76,10 +78,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
   extension
       .AddCondition("GlobalVariableChildExists",
                     _("Child existence"),
-                    _("Check if the specified child of the global "
+                    _("Check if the specified child of the global structure "
                       "variable exists."),
                     _("Child _PARAM1_ of global variable _PARAM0_ exists"),
-                    _("Global variables/Collections/Structures"),
+                    _("Global variables/Arrays and structures"),
                     "res/conditions/var24.png",
                     "res/conditions/var.png")
       .AddParameter("globalvar", _("Variable"))
@@ -88,7 +90,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
 
   extension
       .AddCondition("VarSceneDef",
-                    "Test if a scene variable is defined",
+                    "Variable defined",
                     "Test if the scene variable exists.",
                     "Scene variable _PARAM0_ is defined",
                     _("Scene variables"),
@@ -96,36 +98,38 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
                     "res/conditions/var.png")
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("string", _("Variable"))
-      .SetHidden();
+      .SetHidden();  // Deprecated.
 
   extension
       .AddCondition("VarGlobal",
-                    _("Value of a global variable"),
-                    _("Compare the value of a global variable."),
+                    _("Number variable"),
+                    _("Compare the number value of a global variable."),
                     _("the global variable _PARAM0_"),
                     _("Global variables"),
                     "res/conditions/var24.png",
                     "res/conditions/var.png")
       .AddParameter("globalvar", _("Variable"))
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   extension
       .AddCondition("VarGlobalTxt",
-                    _("Text of a global variable"),
-                    _("Compare the text of a global variable."),
+                    _("Text variable"),
+                    _("Compare the text (string) of a global variable."),
                     _("the text of the global variable _PARAM0_"),
                     _("Global variables"),
                     "res/conditions/var24.png",
                     "res/conditions/var.png")
       .AddParameter("globalvar", _("Variable"))
-      .UseStandardRelationalOperatorParameters("string")
+      .UseStandardRelationalOperatorParameters(
+          "string", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   extension
       .AddCondition(
           "GlobalVariableAsBoolean",
-          _("Boolean value of a global variable"),
+          _("Boolean variable"),
           _("Compare the boolean value of a global variable."),
           _("The boolean value of global variable _PARAM0_ is _PARAM1_"),
           _("Global variables"),
@@ -137,8 +141,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
 
   extension
       .AddCondition("VarGlobalDef",
-                    "Test if a global variable is defined",
-                    "Test if a global variable exists",
+                    "Variable defined",
+                    "Test if a global variable exists.",
                     "Global variable _PARAM0_ is defined",
                     _("Global variables"),
                     "res/conditions/var24.png",
@@ -146,34 +150,36 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("string", _("Variable"))
       .MarkAsAdvanced()
-      .SetHidden();
+      .SetHidden();  // Deprecated.
 
   extension
       .AddAction("ModVarScene",
-                 _("Value of a scene variable"),
-                 _("Change the value of a scene variable."),
+                 _("Change number variable"),
+                 _("Modify the number value of a scene variable."),
                  _("the scene variable _PARAM0_"),
                  _("Scene variables"),
                  "res/actions/var24.png",
                  "res/actions/var.png")
       .AddParameter("scenevar", _("Variable"))
-      .UseStandardOperatorParameters("number");
+      .UseStandardOperatorParameters("number",
+                                     ParameterOptions::MakeNewOptions());
 
   extension
       .AddAction("ModVarSceneTxt",
-                 _("String of a scene variable"),
-                 _("Modify the text of a scene variable."),
+                 _("Change text variable"),
+                 _("Modify the text (string) of a scene variable."),
                  _("the text of scene variable _PARAM0_"),
                  _("Scene variables"),
                  "res/actions/var24.png",
                  "res/actions/var.png")
       .AddParameter("scenevar", _("Variable"))
-      .UseStandardOperatorParameters("string");
+      .UseStandardOperatorParameters("string",
+                                     ParameterOptions::MakeNewOptions());
 
   extension
       .AddAction(
           "SetSceneVariableAsBoolean",
-          _("Boolean value of a scene variable"),
+          _("Change boolean variable"),
           _("Modify the boolean value of a scene variable."),
           _("Set the boolean value of scene variable _PARAM0_ to _PARAM1_"),
           _("Scene variables"),
@@ -184,7 +190,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
 
   extension
       .AddAction("ToggleSceneVariableAsBoolean",
-                 _("Toggle boolean value of a scene variable"),
+                 _("Toggle boolean variable"),
                  _("Toggle the boolean value of a scene variable.") + "\n" +
                      _("If it was true, it will become false, and if it was "
                        "false it will become true."),
@@ -196,32 +202,34 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
 
   extension
       .AddAction("ModVarGlobal",
-                 _("Value of a global variable"),
-                 _("Change the value of a global variable"),
+                 _("Change number variable"),
+                 _("Modify the number value of a global variable."),
                  _("the global variable _PARAM0_"),
                  _("Global variables"),
                  "res/actions/var24.png",
                  "res/actions/var.png")
       .AddParameter("globalvar", _("Variable"))
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters("number",
+                                     ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   extension
       .AddAction("ModVarGlobalTxt",
-                 _("String of a global variable"),
-                 _("Modify the text of a global variable."),
+                 _("Change text variable"),
+                 _("Modify the text (string) of a global variable."),
                  _("the text of global variable _PARAM0_"),
                  _("Global variables"),
                  "res/actions/var24.png",
                  "res/actions/var.png")
       .AddParameter("globalvar", _("Variable"))
-      .UseStandardOperatorParameters("string")
+      .UseStandardOperatorParameters("string",
+                                     ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   extension
       .AddAction(
           "SetGlobalVariableAsBoolean",
-          _("Boolean value of a global variable"),
+          _("Change boolean variable"),
           _("Modify the boolean value of a global variable."),
           _("Set the boolean value of global variable _PARAM0_ to _PARAM1_"),
           _("Global variables"),
@@ -232,7 +240,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
 
   extension
       .AddAction("ToggleGlobalVariableAsBoolean",
-                 _("Toggle boolean value of a global variable"),
+                 _("Toggle boolean variable"),
                  _("Toggle the boolean value of a global variable.") + "\n" +
                      _("If it was true, it will become false, and if it was "
                        "false it will become true."),
@@ -243,202 +251,324 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
       .AddParameter("globalvar", _("Variable"));
 
   extension
-      .AddAction("VariableRemoveChild",
+      .AddAction(
+          "VariableRemoveChild",
           _("Remove a child"),
-                 _("Remove a child from a scene variable."),
-                 _("Remove child _PARAM1_ from scene variable _PARAM0_"),
-                 _("Scene variables/Collections/Structures"),
+          _("Remove a child from a scene structure variable."),
+          _("Remove child _PARAM1_ from scene structure variable _PARAM0_"),
+          _("Scene variables/Arrays and structures"),
           "res/actions/var24.png",
           "res/actions/var.png")
-      .AddParameter("scenevar", _("Variable"))
+      .AddParameter("scenevar", _("Structure variable"))
       .AddParameter("string", _("Child's name"))
       .MarkAsAdvanced();
 
   extension
-      .AddAction("GlobalVariableRemoveChild",
+      .AddAction(
+          "GlobalVariableRemoveChild",
           _("Remove a child"),
-                 _("Remove a child from a global variable."),
-                 _("Remove child _PARAM1_ from global variable _PARAM0_"),
-                 _("Global variables/Collections/Structures"),
+          _("Remove a child from a global structure variable."),
+          _("Remove child _PARAM1_ from global structure variable _PARAM0_"),
+          _("Global variables/Arrays and structures"),
           "res/actions/var24.png",
           "res/actions/var.png")
-      .AddParameter("globalvar", _("Variable"))
+      .AddParameter("globalvar", _("Structure variable"))
       .AddParameter("string", _("Child's name"))
       .MarkAsAdvanced();
 
   extension
       .AddAction("VariableClearChildren",
-                 _("Clear scene variable"),
-                 _("Remove all the children from the scene variable."),
+                 _("Clear children"),
+                 _("Remove all the children from the scene structure or array "
+                   "variable."),
                  _("Clear children from scene variable _PARAM0_"),
-                 _("Scene variables/Collections"),
+                 _("Scene variables/Arrays and structures"),
                  "res/actions/var24.png",
                  "res/actions/var.png")
-      .AddParameter("scenevar", _("Variable"))
+      .AddParameter("scenevar", _("Structure or array variable"))
       .MarkAsAdvanced();
 
   extension
       .AddAction("GlobalVariableClearChildren",
-                 _("Clear global variable"),
-                 _("Remove all the children from the global variable."),
+                 _("Clear children"),
+                 _("Remove all the children from the global structure or array "
+                   "variable."),
                  _("Clear children from global variable _PARAM0_"),
-                 _("Global variables/Collections"),
+                 _("Global variables/Arrays and structures"),
                  "res/actions/var24.png",
                  "res/actions/var.png")
-      .AddParameter("globalvar", _("Variable"))
+      .AddParameter("globalvar", _("Structure or array variable"))
       .MarkAsAdvanced();
 
   extension
       .AddAction("SceneVariablePush",
-                 _("Append variable to a scene array"),
-                 _("Appends a variable at the end of a scene array variable."),
-                 _("Append variable _PARAM1_ to array variable _PARAM0_"),
-                 _("Scene variables/Collections/Arrays"),
+                 _("Add existing variable"),
+                 _("Adds an existing variable at the end of a scene array "
+                   "variable."),
+                 _("Add variable _PARAM1_ to array variable _PARAM0_"),
+                 _("Scene variables/Arrays and structures"),
                  "res/actions/var24.png",
                  "res/actions/var.png")
       .AddParameter("scenevar", _("Array variable"))
-      .AddParameter("scenevar", _("Scene variable with the content to append"))
-      .SetParameterLongDescription(_("The content of the variable will *be copied* and appended at the end of the array."))
+      .AddParameter("scenevar", _("Scene variable with the content to add"))
+      .SetParameterLongDescription(
+          _("The content of the variable will *be copied* and added at the "
+            "end of the array."))
       .MarkAsAdvanced();
 
   extension
-      .AddAction("SceneVariablePushString",
-                 _("Append a string to a scene array"),
-                 _("Appends a string at the end of a scene array variable."),
-                 _("Append string _PARAM1_ to array variable _PARAM0_"),
-                 _("Scene variables/Collections/Arrays"),
+      .AddAction(
+          "SceneVariablePushString",
+          _("Add text variable"),
+          _("Adds a text (string) at the end of a scene array variable."),
+          _("Add text _PARAM1_ to array variable _PARAM0_"),
+          _("Scene variables/Arrays and structures"),
           "res/actions/var24.png",
           "res/actions/var.png")
       .AddParameter("scenevar", _("Array variable"))
-      .AddParameter("string", _("String to append"))
+      .AddParameter("string", _("Text to add"))
       .MarkAsAdvanced();
 
   extension
       .AddAction("SceneVariablePushNumber",
-                 _("Append a number to a scene array"),
-                 _("Appends a number at the end of a scene array variable."),
-                 _("Append number _PARAM1_ to array variable _PARAM0_"),
-                 _("Scene variables/Collections/Arrays"),
+                 _("Add number variable"),
+                 _("Adds a number at the end of a scene array variable."),
+                 _("Add number _PARAM1_ to array variable _PARAM0_"),
+                 _("Scene variables/Arrays and structures"),
                  "res/actions/var24.png",
                  "res/actions/var.png")
       .AddParameter("scenevar", _("Array variable"))
-      .AddParameter("expression", _("Number to append"))
+      .AddParameter("expression", _("Number to add"))
       .MarkAsAdvanced();
 
   extension
       .AddAction("SceneVariablePushBool",
-                 _("Append a boolean to a scene array"),
-                 _("Appends a boolean at the end of a scene array variable."),
-                 _("Append boolean _PARAM1_ to array variable _PARAM0_"),
-                 _("Scene variables/Collections/Arrays"),
+                 _("Add boolean variable"),
+                 _("Adds a boolean at the end of a scene array variable."),
+                 _("Add boolean _PARAM1_ to array variable _PARAM0_"),
+                 _("Scene variables/Arrays and structures"),
                  "res/actions/var24.png",
                  "res/actions/var.png")
       .AddParameter("scenevar", _("Array variable"))
-      .AddParameter("trueorfalse", _("Boolean to append"))
+      .AddParameter("trueorfalse", _("Boolean to add"))
       .MarkAsAdvanced();
 
   extension
-      .AddAction(
-          "SceneVariableRemoveAt",
-          _("Remove variable from a scene array (by index)"),
-          _("Removes a variable at the specified index of a scene array variable."),
-          _("Remove variable at index _PARAM1_ from scene array variable _PARAM0_"),
-          _("Scene variables/Collections/Arrays"),
+      .AddAction("SceneVariableRemoveAt",
+                 _("Remove variable by index"),
+                 _("Removes a variable at the specified index of a scene array "
+                   "variable."),
+                 _("Remove variable at index _PARAM1_ from scene array "
+                   "variable _PARAM0_"),
+                 _("Scene variables/Arrays and structures"),
                  "res/actions/var24.png",
                  "res/actions/var.png")
-      .AddParameter("scenevar", _("Variable"))
+      .AddParameter("scenevar", _("Array variable"))
       .AddParameter("expression", _("Index to remove"))
       .MarkAsAdvanced();
 
   extension
-      .AddAction("GlobalVariablePush",
-                 _("Append variable to a global array"),
-                 _("Appends a variable at the end of a global array variable."),
-                 _("Append variable _PARAM1_ to array variable _PARAM0_"),
-                 _("Global variables/Collections/Arrays"),
-                 "res/actions/var24.png",
-                 "res/actions/var.png")
-      .AddParameter("globalvar", _("Array variable"))
-      .AddParameter("scenevar", _("Scene variable with the content to append"))
-      .SetParameterLongDescription(_("The content of the variable will *be copied* and appended at the end of the array."))
+      .AddCondition(
+          "SceneVariableChildCount",
+          _("Number of children"),
+          _("Compare the number of children in a scene array variable."),
+          _("The number of children in the array variable _PARAM0_"),
+          _("Scene variables/Arrays and structures"),
+          "res/conditions/var24.png",
+          "res/conditions/var.png")
+      .AddParameter("scenevar", _("Array variable"))
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
+  extension
+      .AddStrExpression(
+          "SceneVariableFirstString",
+          _("First text child"),
+          _("Get the value of the first element of a scene array variable, if "
+            "it is a text (string)."),
+          _("Scene variables/Arrays and structures"),
+          "res/actions/var.png")
+      .AddParameter("scenevar", _("Array variable"));
+
+  extension
+      .AddExpression(
+          "SceneVariableFirstNumber",
+          _("First number child"),
+          _("Get the value of the first element of a scene array variable, if "
+            "it is a number."),
+          _("Scene variables/Arrays and structures"),
+          "res/actions/var.png")
+      .AddParameter("scenevar", _("Array variable"));
+
+  extension
+      .AddStrExpression(
+          "SceneVariableLastString",
+          _("Last text child"),
+          _("Get the value of the last element of a scene array variable, if "
+            "it is a text (string)."),
+          _("Scene variables/Arrays and structures"),
+          "res/actions/var.png")
+      .AddParameter("scenevar", _("Array variable"));
+
+  extension
+      .AddExpression(
+          "SceneVariableLastNumber",
+          _("Last number child"),
+          _("Get the value of the last element of a scene array variable, if "
+            "it is a number."),
+          _("Scene variables/Arrays and structures"),
+          "res/actions/var.png")
+      .AddParameter("scenevar", _("Array variable"));
+
   extension
       .AddAction(
-          "GlobalVariableRemoveAt",
-          _("Remove variable from a global array (by index)"),
-          _("Removes a variable at the specified index of a global array variable."),
-          _("Remove variable at index _PARAM1_ from global array variable _PARAM0_"),
-          _("Global variables/Collections/Arrays"),
+          "GlobalVariablePush",
+          _("Add existing variable"),
+          _("Adds an existing variable at the end of a global array variable."),
+          _("Add variable _PARAM1_ to array variable _PARAM0_"),
+          _("Global variables/Arrays and structures"),
           "res/actions/var24.png",
           "res/actions/var.png")
-      .AddParameter("globalvar", _("Variable"))
+      .AddParameter("globalvar", _("Array variable"))
+      .AddParameter("scenevar", _("Scene variable with the content to add"))
+      .SetParameterLongDescription(
+          _("The content of the variable will *be copied* and added at the "
+            "end of the array."))
+      .MarkAsAdvanced();
+
+  extension
+      .AddAction("GlobalVariableRemoveAt",
+                 _("Remove variable by index"),
+                 _("Removes a variable at the specified index of a global "
+                   "array variable."),
+                 _("Remove variable at index _PARAM1_ from global array "
+                   "variable _PARAM0_"),
+                 _("Global variables/Arrays and structures"),
+                 "res/actions/var24.png",
+                 "res/actions/var.png")
+      .AddParameter("globalvar", _("Array variable"))
       .AddParameter("expression", _("Index to remove"))
       .MarkAsAdvanced();
 
   extension
-      .AddAction("GlobalVariablePushString",
-                 _("Append a string to a global array"),
-                 _("Appends a string at the end of a global array variable."),
-                 _("Append string _PARAM1_ to array variable _PARAM0_"),
-                 _("Global variables/Collections/Arrays"),
+      .AddAction(
+          "GlobalVariablePushString",
+          _("Add text variable"),
+          _("Adds a text (string) at the end of a global array variable."),
+          _("Add text _PARAM1_ to array variable _PARAM0_"),
+          _("Global variables/Arrays and structures"),
           "res/actions/var24.png",
           "res/actions/var.png")
       .AddParameter("globalvar", _("Array variable"))
-      .AddParameter("string", _("String to append"))
+      .AddParameter("string", _("Text to add"))
       .MarkAsAdvanced();
 
   extension
       .AddAction("GlobalVariablePushNumber",
-                 _("Append a number to a global array"),
-                 _("Appends a number at the end of a global array variable."),
-                 _("Append number _PARAM1_ to array variable _PARAM0_"),
-                 _("Global variables/Collections/Arrays"),
+                 _("Add number variable"),
+                 _("Adds a number at the end of a global array variable."),
+                 _("Add number _PARAM1_ to array variable _PARAM0_"),
+                 _("Global variables/Arrays and structures"),
                  "res/actions/var24.png",
                  "res/actions/var.png")
       .AddParameter("globalvar", _("Array variable"))
-      .AddParameter("expression", _("Number to append"))
+      .AddParameter("expression", _("Number to add"))
       .MarkAsAdvanced();
 
   extension
       .AddAction("GlobalVariablePushBool",
-                 _("Append a boolean to a global array"),
-                 _("Appends a boolean at the end of a global array variable."),
-                 _("Append boolean _PARAM1_ to array variable _PARAM0_"),
-                 _("Global variables/Collections/Arrays"),
+                 _("Add boolean variable"),
+                 _("Adds a boolean at the end of a global array variable."),
+                 _("Add boolean _PARAM1_ to array variable _PARAM0_"),
+                 _("Global variables/Arrays and structures"),
                  "res/actions/var24.png",
                  "res/actions/var.png")
       .AddParameter("globalvar", _("Array variable"))
-      .AddParameter("trueorfalse", _("Boolean to append"))
+      .AddParameter("trueorfalse", _("Boolean to add"))
       .MarkAsAdvanced();
 
   extension
-      .AddExpression("GlobalVariableChildCount",
-                     _("Number of children of a global variable"),
-                     _("Number of children of a global variable"),
-                     _("Global variables"),
+      .AddCondition(
+          "GlobalVariableChildCount",
+          _("Number of children"),
+          _("Compare the number of children in a global array variable."),
+          _("The number of children of the array variable _PARAM0_"),
+          _("Global variables/Arrays and structures"),
+          "res/conditions/var24.png",
+          "res/conditions/var.png")
+      .AddParameter("globalvar", _("Array variable"))
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions())
+      .MarkAsAdvanced();
+
+  extension
+      .AddStrExpression("GlobalVariableFirstString",
+                        _("First text child"),
+                        _("Value of the first element of a global array "
+                          "variable, if it is a text (string) variable."),
+                        _("Global variables/Arrays and structures"),
                         "res/actions/var.png")
-      .AddParameter("globalvar", _("Variable"));
+      .AddParameter("globalvar", _("Array variable"));
+
+  extension
+      .AddExpression("GlobalVariableFirstNumber",
+                     _("First number child"),
+                     _("Value of the first element of a global array "
+                       "variable, if it is a number variable"),
+                     _("Global variables/Arrays and structures"),
+                     "res/actions/var.png")
+      .AddParameter("globalvar", _("Array variable"));
+
+  extension
+      .AddStrExpression(
+          "GlobalVariableLastString",
+          _("Last text child"),
+          _("Value of the last element of a global array variable, if "
+            "it is a text (string) variable."),
+          _("Global variables/Arrays and structures"),
+          "res/actions/var.png")
+      .AddParameter("globalvar", _("Array variable"));
+
+  extension
+      .AddExpression(
+          "GlobalVariableLastNumber",
+          _("Last number child"),
+          _("Value of the last element of a global array variable, if "
+            "it is a number variable"),
+          _("Global variables/Arrays and structures"),
+          "res/actions/var.png")
+      .AddParameter("globalvar", _("Array variable"));
+
+  extension
+      .AddExpression("GlobalVariableChildCount",
+                     _("Number of children"),
+                     _("Number of children in a global array or "
+                       "structure variable"),
+                     _("Global variables/Arrays and structures"),
+                     "res/actions/var.png")
+      .AddParameter("globalvar", _("Array or structure variable"));
 
   extension
       .AddExpression("VariableChildCount",
-                     _("Number of children of a scene variable"),
-                     _("Number of children of a scene variable"),
-                     _("Scene variables"),
+                     _("Number of children"),
+                     _("Number of children in a scene array or "
+                       "structure variable"),
+                     _("Scene variables/Arrays and structures"),
                      "res/actions/var.png")
-      .AddParameter("scenevar", _("Variable"));
+      .AddParameter("scenevar", _("Array or structure variable"));
 
   extension
       .AddExpression("Variable",
-                     _("Value of a scene variable"),
-                     _("Value of a scene variable"),
+                     _("Number variable"),
+                     _("Number value of a scene variable"),
                      _("Scene variables"),
                      "res/actions/var.png")
       .AddParameter("scenevar", _("Variable"));
 
   extension
       .AddStrExpression("VariableString",
-                        _("Text of a scene variable"),
+                        _("Text variable"),
                         _("Text of a scene variable"),
                         _("Scene variables"),
                         "res/actions/var.png")
@@ -446,15 +576,15 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
 
   extension
       .AddExpression("GlobalVariable",
-                     _("Value of a global variable"),
-                     _("Value of a global variable"),
+                     _("Number variable"),
+                     _("Number value of a global variable"),
                      _("Global variables"),
                      "res/actions/var.png")
       .AddParameter("globalvar", _("Name of the global variable"));
 
   extension
       .AddStrExpression("GlobalVariableString",
-                        _("Text of a global variable"),
+                        _("Text variable"),
                         _("Text of a global variable"),
                         _("Global variables"),
                         "res/actions/var.png")

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(

Core/GDCore/Extensions/Metadata/BehaviorMetadata.h

@@ -236,7 +236,6 @@ class GD_CORE_API BehaviorMetadata {
   }
 
   const gd::String& GetName() const;
-#if defined(GD_IDE_ONLY)
   const gd::String& GetFullName() const { return fullname; }
   const gd::String& GetDefaultName() const { return defaultName; }
   const gd::String& GetDescription() const { return description; }
@@ -257,7 +256,21 @@ class GD_CORE_API BehaviorMetadata {
    * \note An empty string means the base object, so any object.
    */
   const gd::String& GetObjectType() const { return objectType; }
-#endif
+
+  /**
+   * Check if the behavior is private - it can't be used outside of its
+   * extension.
+   */
+  bool IsPrivate() const { return isPrivate; }
+
+  /**
+   * Set that the behavior is private - it can't be used outside of its
+   * extension.
+   */
+  BehaviorMetadata &SetPrivate() {
+    isPrivate = true;
+    return *this;
+  }
 
   /**
    * \brief Return the associated gd::Behavior, handling behavior contents.
@@ -315,6 +328,7 @@ class GD_CORE_API BehaviorMetadata {
   gd::String group;
   gd::String iconFilename;
   gd::String objectType;
+  bool isPrivate = false;
 
   // TODO: Nitpicking: convert these to std::unique_ptr to clarify ownership.
   std::shared_ptr<gd::Behavior> instance;

Core/GDCore/Extensions/Metadata/ExpressionMetadata.cpp

@@ -23,7 +23,8 @@ ExpressionMetadata::ExpressionMetadata(const gd::String& returnType_,
       shown(true),
       smallIconFilename(smallicon_),
       extensionNamespace(extensionNamespace_),
-      isPrivate(false) {
+      isPrivate(false),
+      relevantContext("Any") {
 }
 
 ExpressionMetadata& ExpressionMetadata::SetHidden() {
@@ -37,22 +38,24 @@ 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 +67,9 @@ 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

@@ -137,7 +137,7 @@ class GD_CORE_API ExpressionMetadata {
    * to fulfill std::map requirements.
    */
   ExpressionMetadata()
-      : returnType("unknown"), shown(false), isPrivate(false){};
+      : returnType("unknown"), shown(false), isPrivate(false), relevantContext("Any"){};
 
   virtual ~ExpressionMetadata(){};
 
@@ -184,6 +184,67 @@ class GD_CORE_API ExpressionMetadata {
     return *this;
   }
 
+  /**
+   * Check if the instruction can be used in layouts or external events.
+   */
+  bool IsRelevantForLayoutEvents() const {
+    return relevantContext == "Any" || relevantContext == "Layout";
+  }
+
+  /**
+   * Check if the instruction can be used in function events.
+   */
+  bool IsRelevantForFunctionEvents() const {
+    return relevantContext == "Any" || relevantContext == "Function";
+  }
+
+  /**
+   * Check if the instruction can be used in asynchronous function events.
+   */
+  bool IsRelevantForAsynchronousFunctionEvents() const {
+    return relevantContext == "Any" || relevantContext == "Function" ||
+           relevantContext == "AsynchronousFunction";
+  }
+
+  /**
+   * Check if the instruction can be used in custom object events.
+   */
+  bool IsRelevantForCustomObjectEvents() const {
+    return relevantContext == "Any" || relevantContext == "Object";
+  }
+
+  /**
+   * Set that the instruction can be used in layouts or external events.
+   */
+  ExpressionMetadata &SetRelevantForLayoutEventsOnly() {
+    relevantContext = "Layout";
+    return *this;
+  }
+
+  /**
+   * Set that the instruction can be used in function events.
+   */
+  ExpressionMetadata &SetRelevantForFunctionEventsOnly() {
+    relevantContext = "Function";
+    return *this;
+  }
+
+  /**
+   * Set that the instruction can be used in asynchronous function events.
+   */
+  ExpressionMetadata &SetRelevantForAsynchronousFunctionEventsOnly() {
+    relevantContext = "AsynchronousFunction";
+    return *this;
+  }
+
+  /**
+   * Set that the instruction can be used in custom object events.
+   */
+  ExpressionMetadata &SetRelevantForCustomObjectEventsOnly() {
+    relevantContext = "Object";
+    return *this;
+  }
+
   /**
    * \see gd::InstructionMetadata::AddParameter
    */
@@ -222,6 +283,18 @@ 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 +329,30 @@ 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;
 
@@ -291,6 +387,7 @@ class GD_CORE_API ExpressionMetadata {
   gd::String extensionNamespace;
   bool isPrivate;
   gd::String requiredBaseObjectCapability;
+  gd::String relevantContext;
 };
 
 }  // namespace gd

Core/GDCore/Extensions/Metadata/InstructionMetadata.cpp

@@ -47,7 +47,8 @@ InstructionMetadata::InstructionMetadata(const gd::String& extensionNamespace_,
       usageComplexity(5),
       isPrivate(false),
       isObjectInstruction(false),
-      isBehaviorInstruction(false) {}
+      isBehaviorInstruction(false),
+      relevantContext("Any") {}
 
 InstructionMetadata& InstructionMetadata::AddParameter(
     const gd::String& type,
@@ -55,15 +56,17 @@ 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 +74,7 @@ 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.
@@ -83,20 +86,24 @@ 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 ParameterOptions &options) {
+  const gd::String& expressionValueType =
+      gd::ValueTypeMetadata::GetPrimitiveValueType(type);
+  SetManipulatedType(expressionValueType);
 
   if (type == "boolean") {
-    AddParameter("yesorno", _("New value"));
+    AddParameter(
+        "yesorno",
+        options.description.empty() ? _("New value") : options.description);
     size_t valueParamIndex = parameters.size() - 1;
 
     if (isObjectInstruction || isBehaviorInstruction) {
@@ -117,8 +124,10 @@ 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,
+                 options.description.empty() ? _("Value") : options.description,
+                 options.typeExtraInfo);
 
     size_t operatorParamIndex = parameters.size() - 2;
     size_t valueParamIndex = parameters.size() - 1;
@@ -151,8 +160,10 @@ InstructionMetadata& InstructionMetadata::UseStandardOperatorParameters(
 
 InstructionMetadata&
 InstructionMetadata::UseStandardRelationalOperatorParameters(
-    const gd::String& type) {
-  SetManipulatedType(type);
+    const gd::String& type, const ParameterOptions &options) {
+  const gd::String& expressionValueType =
+      gd::ValueTypeMetadata::GetPrimitiveValueType(type);
+  SetManipulatedType(expressionValueType);
 
   if (type == "boolean") {
     if (isObjectInstruction || isBehaviorInstruction) {
@@ -168,8 +179,10 @@ 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,
+                 options.description.empty() ? _("Value to compare") : options.description,
+                 options.typeExtraInfo);
     size_t operatorParamIndex = parameters.size() - 2;
     size_t valueParamIndex = parameters.size() - 1;
 

Core/GDCore/Extensions/Metadata/InstructionMetadata.h

@@ -14,6 +14,8 @@
 #include "GDCore/Events/Instruction.h"
 #include "GDCore/String.h"
 #include "ParameterMetadata.h"
+#include "ParameterOptions.h"
+
 namespace gd {
 class Project;
 class Layout;
@@ -99,6 +101,67 @@ class GD_CORE_API InstructionMetadata {
     return *this;
   }
 
+  /**
+   * Check if the instruction can be used in layouts or external events.
+   */
+  bool IsRelevantForLayoutEvents() const {
+    return relevantContext == "Any" || relevantContext == "Layout";
+  }
+
+  /**
+   * Check if the instruction can be used in function events.
+   */
+  bool IsRelevantForFunctionEvents() const {
+    return relevantContext == "Any" || relevantContext == "Function";
+  }
+
+  /**
+   * Check if the instruction can be used in asynchronous function events.
+   */
+  bool IsRelevantForAsynchronousFunctionEvents() const {
+    return relevantContext == "Any" || relevantContext == "Function" ||
+           relevantContext == "AsynchronousFunction";
+  }
+
+  /**
+   * Check if the instruction can be used in custom object events.
+   */
+  bool IsRelevantForCustomObjectEvents() const {
+    return relevantContext == "Any" || relevantContext == "Object";
+  }
+
+  /**
+   * Set that the instruction can be used in layouts or external events.
+   */
+  InstructionMetadata &SetRelevantForLayoutEventsOnly() {
+    relevantContext = "Layout";
+    return *this;
+  }
+
+  /**
+   * Set that the instruction can be used in function events.
+   */
+  InstructionMetadata &SetRelevantForFunctionEventsOnly() {
+    relevantContext = "Function";
+    return *this;
+  }
+
+  /**
+   * Set that the instruction can be used in asynchronous function events.
+   */
+  InstructionMetadata &SetRelevantForAsynchronousFunctionEventsOnly() {
+    relevantContext = "AsynchronousFunction";
+    return *this;
+  }
+
+  /**
+   * Set that the instruction can be used in custom object events.
+   */
+  InstructionMetadata &SetRelevantForCustomObjectEventsOnly() {
+    relevantContext = "Object";
+    return *this;
+  }
+
   /**
    * Check if the instruction is asynchronous - it will be running in the
    * background, executing the instructions following it before the frame after
@@ -109,8 +172,8 @@ class GD_CORE_API InstructionMetadata {
   }
 
   /**
-   * Check if the instruction asynchronicity is optional. If it is, it can either
-   * be used synchronously or asynchronously, with one function for each.
+   * Check if the instruction asynchronicity is optional. If it is, it can
+   * either be used synchronously or asynchronously, with one function for each.
    */
   bool IsOptionallyAsync() const {
     return IsAsync() && !codeExtraInformation.functionCallName.empty();
@@ -206,7 +269,7 @@ 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 +281,27 @@ 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 ParameterOptions &options);
 
   /**
    * \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 ParameterOptions &options);
 
   /**
    * \brief Mark the instruction as an object instruction. Automatically called
@@ -276,7 +346,7 @@ class GD_CORE_API InstructionMetadata {
    */
   const gd::String &GetRequiredBaseObjectCapability() const {
     return requiredBaseObjectCapability;
-  };
+  }
 
   /**
    * \brief Consider that the instruction is easy for a user to understand.
@@ -328,11 +398,12 @@ class GD_CORE_API InstructionMetadata {
     }
 
     /**
-     * Set the name of the function, doing asynchronous work, which will be called in
-     * the generated code. This function should return an asynchronous task
-     * (i.e: `gdjs.AsyncTask` in the JavaScript runtime).
+     * Set the name of the function, doing asynchronous work, which will be
+     * called in the generated code. This function should return an asynchronous
+     * task (i.e: `gdjs.AsyncTask` in the JavaScript runtime).
      *
-     * \param functionName the name of the function doing asynchronous work to call.
+     * \param functionName the name of the function doing asynchronous work to
+     * call.
      */
     ExtraInformation &SetAsyncFunctionName(const gd::String &functionName_) {
       asyncFunctionCallName = functionName_;
@@ -476,17 +547,40 @@ class GD_CORE_API InstructionMetadata {
   }
 
   /**
-   * Set the name of the function, doing asynchronous work, which will be called in
-   * the generated code. This function should return an asynchronous task
+   * Set the name of the function, doing asynchronous work, which will be called
+   * in the generated code. This function should return an asynchronous task
    * (i.e: `gdjs.AsyncTask` in the JavaScript runtime).
    *
-   * \param functionName the name of the function doing asynchronous work to call.
-   * \note Shortcut for `codeExtraInformation.SetAsyncFunctionName`.
+   * \param functionName the name of the function doing asynchronous work to
+   * call. \note Shortcut for `codeExtraInformation.SetAsyncFunctionName`.
    */
   ExtraInformation &SetAsyncFunctionName(const gd::String &functionName) {
     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:
@@ -506,6 +600,7 @@ class GD_CORE_API InstructionMetadata {
   bool isObjectInstruction;
   bool isBehaviorInstruction;
   gd::String requiredBaseObjectCapability;
+  gd::String relevantContext;
 };
 
 }  // namespace gd

Core/GDCore/Extensions/Metadata/MultipleInstructionMetadata.h

@@ -8,6 +8,8 @@
 #include "GDCore/Extensions/Metadata/ExpressionMetadata.h"
 #include "GDCore/Extensions/Metadata/InstructionMetadata.h"
 #include "GDCore/String.h"
+#include "ParameterOptions.h"
+
 namespace gd {}  // namespace gd
 
 namespace gd {
@@ -32,8 +34,7 @@ class GD_CORE_API MultipleInstructionMetadata {
     return MultipleInstructionMetadata(expression, condition, action);
   }
   static MultipleInstructionMetadata WithConditionAndAction(
-      gd::InstructionMetadata &condition,
-      gd::InstructionMetadata &action) {
+      gd::InstructionMetadata &condition, gd::InstructionMetadata &action) {
     return MultipleInstructionMetadata(condition, action);
   }
 
@@ -80,6 +81,17 @@ 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 +128,11 @@ 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 ParameterOptions &options) {
+    if (condition)
+      condition->UseStandardRelationalOperatorParameters(type, options);
+    if (action) action->UseStandardOperatorParameters(type, options);
     return *this;
   }
 
@@ -154,6 +168,29 @@ 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");
+  }
+
+  /**
+   * \see gd::InstructionMetadata::SetPrivate
+   */
+  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.h

@@ -295,6 +295,22 @@ class GD_CORE_API ObjectMetadata {
    */
   std::map<gd::String, gd::ExpressionMetadata>& GetAllStrExpressions() { return strExpressionsInfos; };
 
+  /**
+   * \brief Set the object to be hidden in the IDE.
+   *
+   * Used mainly when an object is deprecated.
+   */
+  ObjectMetadata &SetHidden() {
+    hidden = true;
+    return *this;
+  }
+
+
+  /**
+   * \brief Return true if the instruction must be hidden in the IDE.
+   */
+  bool IsHidden() const { return hidden; }
+
   std::map<gd::String, gd::InstructionMetadata> conditionsInfos;
   std::map<gd::String, gd::InstructionMetadata> actionsInfos;
   std::map<gd::String, gd::ExpressionMetadata> expressionsInfos;
@@ -314,6 +330,7 @@ class GD_CORE_API ObjectMetadata {
   gd::String iconFilename;
   gd::String categoryFullName;
   std::set<gd::String> unsupportedBaseObjectCapabilities;
+  bool hidden = false;
 
   std::shared_ptr<gd::ObjectConfiguration>
       blueprintObject;  ///< The "blueprint" object to be copied when a new

Core/GDCore/Extensions/Metadata/ParameterMetadata.cpp

@@ -10,43 +10,26 @@
 
 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);
+  if (!longDescription.empty()) {
     element.SetAttribute("longDescription", longDescription);
+  }
+  if (codeOnly) {
    element.SetAttribute("codeOnly", codeOnly);
-  element.SetAttribute("defaultValue", defaultValue);
+  }
   element.SetAttribute("name", name);
 }
 
 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");
-  defaultValue = element.GetStringAttribute("defaultValue");
   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;
   }
 
@@ -128,13 +144,15 @@ class GD_CORE_API ParameterMetadata {
   /**
    * \brief Get the default value for the parameter.
    */
-  const gd::String &GetDefaultValue() const { return defaultValue; }
+  const gd::String &GetDefaultValue() const {
+    return valueTypeMetadata.GetDefaultValue();
+  }
 
   /**
    * \brief Set the default value, if the parameter is optional.
    */
   ParameterMetadata &SetDefaultValue(const gd::String &defaultValue_) {
-    defaultValue = defaultValue_;
+    valueTypeMetadata.SetDefaultValue(defaultValue_);
     return *this;
   }
 
@@ -151,26 +169,27 @@ 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 +198,22 @@ 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
    */
@@ -232,22 +231,17 @@ 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.
   gd::String name;             ///< The name of the parameter to be used in code
                                ///< generation. Optional.
 };
 
 }  // 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/ParameterOptions.h

@@ -0,0 +1,35 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+
+#ifndef PARAMETEROPTIONS_H
+#define PARAMETEROPTIONS_H
+#include "GDCore/String.h"
+#include "ParameterMetadata.h"
+
+namespace gd {}  // namespace gd
+
+namespace gd {
+struct GD_CORE_API ParameterOptions {
+  gd::String description;
+  gd::String typeExtraInfo;
+
+  ParameterOptions &SetDescription(const gd::String &description_) {
+    description = description_;
+    return *this;
+  }
+  ParameterOptions &SetTypeExtraInfo(const gd::String &typeExtraInfo_) {
+    typeExtraInfo = typeExtraInfo_;
+    return *this;
+  }
+
+  static ParameterOptions MakeNewOptions() {
+    ParameterOptions emptyOptions;
+    return emptyOptions;
+  }
+};
+}
+
+#endif  // PARAMETEROPTIONS_H

Core/GDCore/Extensions/Metadata/ValueTypeMetadata.cpp

@@ -0,0 +1,70 @@
+/*
+ * 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;
+}
+
+const gd::String ValueTypeMetadata::numberValueType = "number";
+const gd::String ValueTypeMetadata::booleanValueType = "boolean";
+const gd::String ValueTypeMetadata::colorValueType = "color";
+const gd::String ValueTypeMetadata::choiceValueType = "stringWithSelector";
+const gd::String ValueTypeMetadata::stringValueType = "string";
+
+const gd::String &ValueTypeMetadata::ConvertPropertyTypeToValueType(
+    const gd::String &propertyType) {
+  if (propertyType == "Number") {
+    return numberValueType;
+  } else if (propertyType == "Boolean") {
+    return booleanValueType;
+  } else if (propertyType == "Color") {
+    return colorValueType;
+  } else if (propertyType == "Choice") {
+    return choiceValueType;
+  }
+  // For "String" or default
+  return stringValueType;
+};
+
+}  // namespace gd

Core/GDCore/Extensions/Metadata/ValueTypeMetadata.h

@@ -0,0 +1,231 @@
+/*
+ * 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;
+
+  /**
+   * \brief Return the ValueTypeMetadata name for a property type.
+   * \see gd::PropertyDescriptor
+   */
+  static const gd::String &ConvertPropertyTypeToValueType(const gd::String &propertyType);
+
+  /** \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.
+
+  static const gd::String numberValueType;
+  static const gd::String booleanValueType;
+  static const gd::String colorValueType;
+  static const gd::String choiceValueType;
+  static const gd::String stringValueType;
+};
+
+}  // namespace gd
+
+#endif  // VALUE_TYPE_METADATA_H

Core/GDCore/Extensions/PlatformExtension.cpp

@@ -24,14 +24,12 @@
 
 namespace gd {
 
-#if defined(GD_IDE_ONLY)
 std::map<gd::String, gd::InstructionMetadata>
     PlatformExtension::badConditionsMetadata;
 std::map<gd::String, gd::InstructionMetadata>
     PlatformExtension::badActionsMetadata;
 std::map<gd::String, gd::ExpressionMetadata>
     PlatformExtension::badExpressionsMetadata;
-#endif
 
 gd::InstructionMetadata& PlatformExtension::AddCondition(
     const gd::String& name,
@@ -41,7 +39,6 @@ gd::InstructionMetadata& PlatformExtension::AddCondition(
     const gd::String& group,
     const gd::String& icon,
     const gd::String& smallicon) {
-#if defined(GD_IDE_ONLY)
   gd::String nameWithNamespace = GetNameSpace() + name;
   conditionsInfos[nameWithNamespace] = InstructionMetadata(GetNameSpace(),
                                                            nameWithNamespace,
@@ -53,7 +50,6 @@ gd::InstructionMetadata& PlatformExtension::AddCondition(
                                                            smallicon)
                                            .SetHelpPath(GetHelpPath());
   return conditionsInfos[nameWithNamespace];
-#endif
 }
 
 gd::InstructionMetadata& PlatformExtension::AddAction(
@@ -64,7 +60,6 @@ gd::InstructionMetadata& PlatformExtension::AddAction(
     const gd::String& group,
     const gd::String& icon,
     const gd::String& smallicon) {
-#if defined(GD_IDE_ONLY)
   gd::String nameWithNamespace = GetNameSpace() + name;
   actionsInfos[nameWithNamespace] = InstructionMetadata(GetNameSpace(),
                                                         nameWithNamespace,
@@ -76,7 +71,6 @@ gd::InstructionMetadata& PlatformExtension::AddAction(
                                                         smallicon)
                                         .SetHelpPath(GetHelpPath());
   return actionsInfos[nameWithNamespace];
-#endif
 }
 
 gd::ExpressionMetadata& PlatformExtension::AddExpression(
@@ -85,7 +79,6 @@ gd::ExpressionMetadata& PlatformExtension::AddExpression(
     const gd::String& description,
     const gd::String& group,
     const gd::String& smallicon) {
-#if defined(GD_IDE_ONLY)
   gd::String nameWithNamespace = GetNameSpace() + name;
   expressionsInfos[nameWithNamespace] = ExpressionMetadata("number",
                                                            GetNameSpace(),
@@ -96,7 +89,6 @@ gd::ExpressionMetadata& PlatformExtension::AddExpression(
                                                            smallicon)
                                             .SetHelpPath(GetHelpPath());
   return expressionsInfos[nameWithNamespace];
-#endif
 }
 
 gd::ExpressionMetadata& PlatformExtension::AddStrExpression(
@@ -105,7 +97,6 @@ gd::ExpressionMetadata& PlatformExtension::AddStrExpression(
     const gd::String& description,
     const gd::String& group,
     const gd::String& smallicon) {
-#if defined(GD_IDE_ONLY)
   gd::String nameWithNamespace = GetNameSpace() + name;
   strExpressionsInfos[nameWithNamespace] = ExpressionMetadata("string",
                                                               GetNameSpace(),
@@ -116,7 +107,6 @@ gd::ExpressionMetadata& PlatformExtension::AddStrExpression(
                                                               smallicon)
                                                .SetHelpPath(GetHelpPath());
   return strExpressionsInfos[nameWithNamespace];
-#endif
 }
 
 gd::MultipleInstructionMetadata PlatformExtension::AddExpressionAndCondition(
@@ -220,12 +210,10 @@ PlatformExtension::AddExpressionAndConditionAndAction(
       expression, condition, action);
 }
 
-#if defined(GD_IDE_ONLY)
 gd::DependencyMetadata& PlatformExtension::AddDependency() {
   extensionDependenciesMetadata.push_back(DependencyMetadata());
   return extensionDependenciesMetadata.back();
 }
-#endif
 
 gd::ObjectMetadata& PlatformExtension::AddObject(
     const gd::String& name,
@@ -317,7 +305,6 @@ gd::EventMetadata& PlatformExtension::AddEvent(
     const gd::String& group_,
     const gd::String& smallicon_,
     std::shared_ptr<gd::BaseEvent> instance_) {
-#if defined(GD_IDE_ONLY)
   gd::String nameWithNamespace = GetNameSpace() + name_;
   eventsInfos[nameWithNamespace] = gd::EventMetadata(nameWithNamespace,
                                                      fullname_,
@@ -326,7 +313,6 @@ gd::EventMetadata& PlatformExtension::AddEvent(
                                                      smallicon_,
                                                      instance_);
   return eventsInfos[nameWithNamespace];
-#endif
 }
 
 PlatformExtension& PlatformExtension::SetExtensionInformation(
@@ -406,8 +392,6 @@ std::vector<gd::String> PlatformExtension::GetBehaviorsTypes() const {
   return behaviors;
 }
 
-#if defined(GD_IDE_ONLY)
-
 gd::InstructionMetadata& PlatformExtension::AddDuplicatedAction(
     const gd::String& newActionName, const gd::String& copiedActionName) {
   gd::String newNameWithNamespace = GetNameSpace() + newActionName;
@@ -586,7 +570,6 @@ gd::BaseEventSPtr PlatformExtension::CreateEvent(
 
   return std::shared_ptr<gd::BaseEvent>();
 }
-#endif
 
 CreateFunPtr PlatformExtension::GetObjectCreationFunctionPtr(
     const gd::String& objectType) const {
@@ -665,7 +648,6 @@ bool PlatformExtension::IsBuiltin() const {
          builtinExtensions.end();
 }
 
-#if defined(GD_IDE_ONLY)
 void PlatformExtension::StripUnimplementedInstructionsAndExpressions() {
   for (std::map<gd::String, gd::InstructionMetadata>::iterator it =
            GetAllActions().begin();
@@ -810,7 +792,40 @@ void PlatformExtension::StripUnimplementedInstructionsAndExpressions() {
       ++it;
   }
 }
-#endif
+
+gd::String
+PlatformExtension::GetEventsFunctionFullType(const gd::String &extensionName,
+                                             const gd::String &functionName) {
+  const auto &separator = GetNamespaceSeparator();
+  return extensionName + separator + functionName;
+}
+
+gd::String PlatformExtension::GetBehaviorEventsFunctionFullType(
+    const gd::String &extensionName, const gd::String &behaviorName,
+    const gd::String &functionName) {
+  const auto &separator = GetNamespaceSeparator();
+  return extensionName + separator + behaviorName + separator + functionName;
+}
+
+gd::String
+PlatformExtension::GetBehaviorFullType(const gd::String &extensionName,
+                                       const gd::String &behaviorName) {
+  const auto &separator = GetNamespaceSeparator();
+  return extensionName + separator + behaviorName;
+}
+
+gd::String PlatformExtension::GetObjectEventsFunctionFullType(
+    const gd::String &extensionName, const gd::String &objectName,
+    const gd::String &functionName) {
+  const auto &separator = GetNamespaceSeparator();
+  return extensionName + separator + objectName + separator + functionName;
+}
+
+gd::String PlatformExtension::GetObjectFullType(const gd::String &extensionName,
+                                                const gd::String &objectName) {
+  const auto &separator = GetNamespaceSeparator();
+  return extensionName + separator + objectName;
+}
 
 PlatformExtension::PlatformExtension()
     : deprecated(false), category(_("General")) {}

Core/GDCore/Extensions/PlatformExtension.h

@@ -620,7 +620,26 @@ class GD_CORE_API PlatformExtension {
    */
   static gd::String GetNamespaceSeparator() { return "::"; }
 
- private:
+  static gd::String GetEventsFunctionFullType(const gd::String &extensionName,
+                                              const gd::String &functionName);
+
+  static gd::String
+  GetBehaviorEventsFunctionFullType(const gd::String &extensionName,
+                                    const gd::String &behaviorName,
+                                    const gd::String &functionName);
+
+  static gd::String GetBehaviorFullType(const gd::String &extensionName,
+                                        const gd::String &behaviorName);
+
+  static gd::String
+  GetObjectEventsFunctionFullType(const gd::String &extensionName,
+                                  const gd::String &objectName,
+                                  const gd::String &functionName);
+
+  static gd::String GetObjectFullType(const gd::String &extensionName,
+                                      const gd::String &objectName);
+
+private:
   /**
    * Set the namespace (the string all actions/conditions/expressions start
    * with).

Core/GDCore/IDE/Dialogs/LayoutEditorCanvas/EditorSettings.h

@@ -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)
 #ifndef SCENECANVASSETTINGS_H
 #define SCENECANVASSETTINGS_H
 #include "GDCore/String.h"
@@ -43,4 +42,3 @@ private:
 }  // namespace gd
 
 #endif  // SCENECANVASSETTINGS_H
-#endif

Core/GDCore/IDE/EventBasedBehaviorBrowser.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 "EventBasedBehaviorBrowser.h"
+
+#include "GDCore/IDE/Events/ArbitraryEventsWorker.h"
+#include "GDCore/IDE/Project/ArbitraryEventBasedBehaviorsWorker.h"
+#include "GDCore/IDE/Project/ArbitraryEventsFunctionsWorker.h"
+#include "GDCore/IDE/Project/ArbitraryObjectsWorker.h"
+#include "GDCore/IDE/Project/ArbitraryBehaviorSharedDataWorker.h"
+#include "GDCore/IDE/ProjectBrowserHelper.h"
+#include "GDCore/Project/EventsBasedBehavior.h"
+#include "GDCore/Project/Project.h"
+#include "GDCore/String.h"
+
+namespace gd {
+
+void EventBasedBehaviorBrowser::ExposeEvents(
+    gd::Project &project, gd::ArbitraryEventsWorker &worker) const {
+  gd::ProjectBrowserHelper::ExposeEventsBasedBehaviorEvents(
+      project, eventsBasedBehavior, worker);
+}
+
+void EventBasedBehaviorBrowser::ExposeEvents(
+    gd::Project &project, gd::ArbitraryEventsWorkerWithContext &worker) const {
+  gd::ProjectBrowserHelper::ExposeEventsBasedBehaviorEvents(
+      project, eventsBasedBehavior, worker);
+}
+
+void EventBasedBehaviorBrowser::ExposeObjects(
+    gd::Project &project, gd::ArbitraryObjectsWorker &worker) const {}
+
+void EventBasedBehaviorBrowser::ExposeFunctions(
+    gd::Project &project, gd::ArbitraryEventsFunctionsWorker &worker) const {
+  worker.Launch(eventsBasedBehavior.GetEventsFunctions());
+}
+
+void EventBasedBehaviorBrowser::ExposeEventBasedBehaviors(
+    gd::Project &project,
+    gd::ArbitraryEventBasedBehaviorsWorker &worker) const {
+  worker.Launch(eventsBasedBehavior);
+}
+
+void EventBasedBehaviorBrowser::ExposeBehaviorSharedDatas(
+    gd::Project &project, gd::ArbitraryBehaviorSharedDataWorker &worker) const {}
+
+} // namespace gd

Core/GDCore/IDE/EventBasedBehaviorBrowser.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.
+ */
+#pragma once
+
+#include "GDCore/IDE/ProjectBrowser.h"
+
+namespace gd {
+class Project;
+class String;
+class EventsFunctionsExtension;
+class EventsFunction;
+class EventsBasedBehavior;
+class EventsBasedObject;
+class ArbitraryEventsWorker;
+class ArbitraryEventsWorkerWithContext;
+class ArbitraryEventsFunctionsWorker;
+class ArbitraryObjectsWorker;
+class ArbitraryEventBasedBehaviorsWorker;
+class ArbitraryBehaviorSharedDataWorker;
+} // namespace gd
+
+namespace gd {
+
+/**
+ * \brief Expose event-based behavior contents to workers.
+ */
+class GD_CORE_API EventBasedBehaviorBrowser : public ProjectBrowser {
+public:
+  EventBasedBehaviorBrowser(gd::EventsBasedBehavior &eventsBasedBehavior_)
+      : eventsBasedBehavior(eventsBasedBehavior_) {}
+
+  /**
+   * \brief Call the specified worker on all events of the event-based
+   * behavior.
+   *
+   * This should be the preferred way to traverse all the events of an event-based behavior.
+   */
+  void ExposeEvents(gd::Project &project,
+                    gd::ArbitraryEventsWorker &worker) const override;
+
+  /**
+   * \brief Call the specified worker on all events of the event-based
+   * behavior.
+   *
+   * This should be the preferred way to traverse all the events of an event-based behavior.
+   */
+  void
+  ExposeEvents(gd::Project &project,
+               gd::ArbitraryEventsWorkerWithContext &worker) const override;
+
+  /**
+   * \brief Call the specified worker on all functions of the event-based behavior
+   *
+   * This should be the preferred way to traverse all the function signatures
+   * of an event-based behavior.
+   */
+  void ExposeFunctions(gd::Project &project,
+                       gd::ArbitraryEventsFunctionsWorker &worker) const override;
+
+  /**
+   * \brief Do nothing.
+   */
+  void ExposeObjects(gd::Project &project,
+                     gd::ArbitraryObjectsWorker &worker) const override;
+
+  /**
+   * \brief Call the specified worker on the event-based behavior.
+   */
+  void ExposeEventBasedBehaviors(
+      gd::Project &project,
+      gd::ArbitraryEventBasedBehaviorsWorker &worker) const override;
+
+  /**
+   * \brief Do nothing.
+   */
+  void ExposeBehaviorSharedDatas(gd::Project &project,
+                         gd::ArbitraryBehaviorSharedDataWorker &worker) const override;
+
+private:
+  gd::EventsBasedBehavior &eventsBasedBehavior;
+};
+
+} // namespace gd

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.h

@@ -8,13 +8,10 @@
 #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
@@ -23,17 +20,15 @@ namespace gd {
 
 class GD_CORE_API BehaviorTypeRenamer : public ArbitraryObjectsWorker {
  public:
-  BehaviorTypeRenamer(const gd::Project& project_,
-                          const gd::String& oldType_,
+  BehaviorTypeRenamer(const gd::String& oldType_,
                       const gd::String& newType_)
-      : project(project_), oldType(oldType_), newType(newType_){};
+      : 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;
 };

Core/GDCore/IDE/Events/CustomObjectTypeRenamer.h

@@ -8,13 +8,10 @@
 #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
@@ -23,17 +20,15 @@ namespace gd {
 
 class GD_CORE_API CustomObjectTypeRenamer : public ArbitraryObjectsWorker {
  public:
-  CustomObjectTypeRenamer(const gd::Project& project_,
-                          const gd::String& oldType_,
+  CustomObjectTypeRenamer(const gd::String& oldType_,
                           const gd::String& newType_)
-      : project(project_), oldType(oldType_), newType(newType_){};
+      : 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;
 };

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 relevant 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

@@ -237,12 +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)) {
@@ -252,7 +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)) {
@@ -291,12 +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)) {
@@ -306,7 +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)) {
@@ -425,14 +425,14 @@ 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, globalObjectsContainer, objectsContainer, "number", *node, name)) {
@@ -442,7 +442,7 @@ bool EventsRefactorer::RemoveObjectInActions(const gd::Platform& platform,
       }
       // 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, globalObjectsContainer, objectsContainer, "string", *node, name)) {
@@ -485,14 +485,14 @@ 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, globalObjectsContainer, objectsContainer, "number", *node, name)) {
@@ -502,7 +502,7 @@ bool EventsRefactorer::RemoveObjectInConditions(
       }
       // 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, globalObjectsContainer, objectsContainer, "string", *node, name)) {
@@ -773,6 +773,8 @@ vector<EventsSearchResult> EventsRefactorer::SearchInEvents(
   const gd::String& ignored_characters =
       EventsRefactorer::searchIgnoredCharacters;
 
+  if (inEventSentences) {
+    // Remove ignored characters only when searching in event sentences.
     search.replace_if(
         search.begin(),
         search.end(),
@@ -782,6 +784,7 @@ vector<EventsSearchResult> EventsRefactorer::SearchInEvents(
         "");
     search = search.LeftTrim().RightTrim();
     search.RemoveConsecutiveOccurrences(search.begin(), search.end(), ' ');
+  }
 
   for (std::size_t i = 0; i < events.size(); ++i) {
     bool eventAddedInResults = false;

Core/GDCore/IDE/Events/EventsRemover.h

@@ -22,7 +22,7 @@ class EventsList;
 namespace gd {
 
 /**
- * \brief List the values of the parameters of events and their type.
+ * \brief Allow to safely remove a bunch of events.
  *
  * \ingroup IDE
  */

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(
+            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(
+void EventsVariablesFinder::FindArgumentsInEventsAndDependencies(
+    std::set<gd::String>& results,
     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(
+  VariableFinderEventWorker eventWorker(results,
                                         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(
-    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());
+  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());
-  }
-
-  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,
+    VariableFinderEventWorker eventWorker(results,
+                                          platform,
                                           parameterType,
                                           objectName);
-      results.insert(results2.begin(), results2.end());
+    eventWorker.Launch(dependencyLayout.GetEvents(), project, dependencyLayout);
   }
-
-    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

@@ -150,7 +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/InstructionsCountEvaluator.cpp

@@ -0,0 +1,24 @@
+#include "InstructionsCountEvaluator.h"
+
+#include "GDCore/Events/Instruction.h"
+#include "GDCore/Extensions/PlatformExtension.h"
+#include "GDCore/IDE/ProjectBrowserHelper.h"
+
+namespace gd {
+
+const int InstructionsCountEvaluator::ScanProject(gd::Project &project) {
+  InstructionsCountEvaluator worker(project);
+  gd::ProjectBrowserHelper::ExposeProjectEventsWithoutExtensions(project,
+                                                                 worker);
+  return worker.instructionCount;
+};
+
+// Instructions scanner
+
+bool InstructionsCountEvaluator::DoVisitInstruction(
+    gd::Instruction &instruction, bool isCondition) {
+  instructionCount++;
+  return false;
+}
+
+} // namespace gd

Core/GDCore/IDE/Events/InstructionsCountEvaluator.h

@@ -0,0 +1,50 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+
+#ifndef GDCORE_INSTRUCTIONS_COUNT_EVALUATOR_H
+#define GDCORE_INSTRUCTIONS_COUNT_EVALUATOR_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 {
+
+/**
+ * @brief Count the number of instructions in a project excluding extensions.
+ *
+ * This is used by the examples repository to evaluate examples size.
+ *
+ */
+class GD_CORE_API InstructionsCountEvaluator : public ArbitraryEventsWorker {
+public:
+  /**
+   * Return the number of instructions in the project excluding extensions.
+   */
+  static const int ScanProject(gd::Project &project);
+
+private:
+  InstructionsCountEvaluator(gd::Project &project_)
+      : project(project_), instructionCount(0){};
+  gd::Project &project;
+  int instructionCount;
+
+  // Instructions Visitor
+  bool DoVisitInstruction(gd::Instruction &instruction,
+                          bool isCondition) override;
+};
+
+}; // namespace gd
+
+#endif

Core/GDCore/IDE/Events/UsedExtensionsFinder.cpp

@@ -2,7 +2,9 @@
 
 #include "GDCore/Events/Instruction.h"
 #include "GDCore/Extensions/Metadata/MetadataProvider.h"
+#include "GDCore/Extensions/Metadata/ParameterMetadataTools.h"
 #include "GDCore/Extensions/PlatformExtension.h"
+#include "GDCore/IDE/ProjectBrowserHelper.h"
 #include "GDCore/IDE/WholeProjectRefactorer.h"
 #include "GDCore/IDE/Events/ExpressionTypeFinder.h"
 #include "GDCore/Project/Behavior.h"
@@ -11,30 +13,36 @@
 
 namespace gd {
 
-std::set<gd::String> UsedExtensionsFinder::ScanProject(gd::Project& project) {
+const UsedExtensionsResult UsedExtensionsFinder::ScanProject(gd::Project& project) {
   UsedExtensionsFinder worker(project);
-  gd::WholeProjectRefactorer::ExposeProjectObjects(project, worker);
-  gd::WholeProjectRefactorer::ExposeProjectEvents(project, worker);
-  return worker.usedExtensions;
+  gd::ProjectBrowserHelper::ExposeProjectObjects(project, worker);
+  gd::ProjectBrowserHelper::ExposeProjectEvents(project, worker);
+  return worker.result;
 };
 
 // Objects scanner
 
-void UsedExtensionsFinder::DoVisitObject(gd::Object& object) {
-  usedExtensions.insert(gd::MetadataProvider::GetExtensionAndObjectMetadata(
-                            project.GetCurrentPlatform(), object.GetType())
-                            .GetExtension()
-                            .GetName());
+void UsedExtensionsFinder::DoVisitObject(gd::Object &object) {
+  auto metadata = gd::MetadataProvider::GetExtensionAndObjectMetadata(
+      project.GetCurrentPlatform(), object.GetType());
+  result.GetUsedExtensions().insert(metadata.GetExtension().GetName());
+  for (auto &&includeFile : metadata.GetMetadata().includeFiles) {
+    result.GetUsedIncludeFiles().insert(includeFile);
+  }
 };
 
 // Behaviors scanner
 
-void UsedExtensionsFinder::DoVisitBehavior(gd::Behavior& behavior) {
-  usedExtensions.insert(
-      gd::MetadataProvider::GetExtensionAndBehaviorMetadata(
-          project.GetCurrentPlatform(), behavior.GetTypeName())
-          .GetExtension()
-          .GetName());
+void UsedExtensionsFinder::DoVisitBehavior(gd::Behavior &behavior) {
+  auto metadata = gd::MetadataProvider::GetExtensionAndBehaviorMetadata(
+      project.GetCurrentPlatform(), behavior.GetTypeName());
+  result.GetUsedExtensions().insert(metadata.GetExtension().GetName());
+  for (auto &&includeFile : metadata.GetMetadata().includeFiles) {
+    result.GetUsedIncludeFiles().insert(includeFile);
+  }
+  for (auto &&includeFile : metadata.GetMetadata().requiredFiles) {
+    result.GetUsedRequiredFiles().insert(includeFile);
+  }
 };
 
 // Instructions scanner
@@ -46,23 +54,29 @@ bool UsedExtensionsFinder::DoVisitInstruction(gd::Instruction& instruction,
                         project.GetCurrentPlatform(), instruction.GetType())
                   : gd::MetadataProvider::GetExtensionAndActionMetadata(
                         project.GetCurrentPlatform(), instruction.GetType());
-  usedExtensions.insert(metadata.GetExtension().GetName());
+  result.GetUsedExtensions().insert(metadata.GetExtension().GetName());
+  for (auto&& includeFile : metadata.GetMetadata().GetIncludeFiles()) {
+    result.GetUsedIncludeFiles().insert(includeFile);
+  }
 
-  size_t i = 0;
-  for (auto expression : instruction.GetParameters()) {
-    const gd::String& parameterType =
-        metadata.GetMetadata().GetParameter(i).GetType();
-    i++;
+  gd::ParameterMetadataTools::IterateOverParameters(
+      instruction.GetParameters(),
+      metadata.GetMetadata().GetParameters(),
+      [this](const gd::ParameterMetadata& parameterMetadata,
+          const gd::Expression& parameterValue,
+          const gd::String& lastObjectName) {
+    const gd::String& parameterType = parameterMetadata.GetType();
 
     if (gd::ParameterMetadata::IsExpression("string", parameterType)) {
       rootType = "string";
-      expression.GetRootNode()->Visit(*this);
+      parameterValue.GetRootNode()->Visit(*this);
     } else if (gd::ParameterMetadata::IsExpression("number", parameterType)) {
       rootType = "number";
-      expression.GetRootNode()->Visit(*this);
+      parameterValue.GetRootNode()->Visit(*this);
     } else if (gd::ParameterMetadata::IsExpression("variable", parameterType))
-      usedExtensions.insert("BuiltinVariables");
-  }
+      result.GetUsedExtensions().insert("BuiltinVariables");
+  });
+
   return false;
 }
 
@@ -93,31 +107,35 @@ void UsedExtensionsFinder::OnVisitUnaryOperatorNode(UnaryOperatorNode& node) {
 
 // Add variable extension and visit sub-expressions on variable nodes
 void UsedExtensionsFinder::OnVisitVariableNode(VariableNode& node) {
-  usedExtensions.insert("BuiltinVariables");
+  result.GetUsedExtensions().insert("BuiltinVariables");
   if (node.child) node.child->Visit(*this);
 };
 
 void UsedExtensionsFinder::OnVisitVariableAccessorNode(
     VariableAccessorNode& node) {
-  usedExtensions.insert("BuiltinVariables");
+  result.GetUsedExtensions().insert("BuiltinVariables");
   if (node.child) node.child->Visit(*this);
 };
 
 void UsedExtensionsFinder::OnVisitVariableBracketAccessorNode(
     VariableBracketAccessorNode& node) {
-  usedExtensions.insert("BuiltinVariables");
+  result.GetUsedExtensions().insert("BuiltinVariables");
   node.expression->Visit(*this);
   if (node.child) node.child->Visit(*this);
 };
 
 // Add extensions bound to Objects/Behaviors/Functions
-void UsedExtensionsFinder::OnVisitIdentifierNode(IdentifierNode& node) {
-  auto type = gd::ExpressionTypeFinder::GetType(project.GetCurrentPlatform(), GetGlobalObjectsContainer(), GetObjectsContainer(), rootType, node);
+void UsedExtensionsFinder::OnVisitIdentifierNode(IdentifierNode &node) {
+  auto type = gd::ExpressionTypeFinder::GetType(
+      project.GetCurrentPlatform(), GetGlobalObjectsContainer(),
+      GetObjectsContainer(), rootType, node);
   if (gd::ParameterMetadata::IsObject(type)) {
-    usedExtensions.insert(gd::MetadataProvider::GetExtensionAndObjectMetadata(
-                              project.GetCurrentPlatform(), node.identifierName)
-                              .GetExtension()
-                              .GetName());
+    auto metadata = gd::MetadataProvider::GetExtensionAndObjectMetadata(
+        project.GetCurrentPlatform(), node.identifierName);
+    result.GetUsedExtensions().insert(metadata.GetExtension().GetName());
+    for (auto &&includeFile : metadata.GetMetadata().includeFiles) {
+      result.GetUsedIncludeFiles().insert(includeFile);
+    }
   }
 };
 
@@ -138,7 +156,10 @@ void UsedExtensionsFinder::OnVisitFunctionCallNode(FunctionCallNode& node) {
       return;
   }
 
-  usedExtensions.insert(metadata.GetExtension().GetName());
+  result.GetUsedExtensions().insert(metadata.GetExtension().GetName());
+  for (auto&& includeFile : metadata.GetMetadata().GetIncludeFiles()) {
+    result.GetUsedIncludeFiles().insert(includeFile);
+  }
 };
 
 }  // namespace gd

Core/GDCore/IDE/Events/UsedExtensionsFinder.h

@@ -21,18 +21,62 @@ class Behavior;
 
 namespace gd {
 
+class GD_CORE_API UsedExtensionsResult {
+public:
+  /**
+   * The extensions used by the project (or part of it).
+   */
+  const std::set<gd::String> &GetUsedExtensions() const {
+    return usedExtensions;
+  }
+
+  /**
+   * The include files used at runtime by the project (or part of it).
+   */
+  const std::set<gd::String> &GetUsedIncludeFiles() const {
+    return usedIncludeFiles;
+  }
+
+  /**
+   * The additional files required at runtime by the project (or part of it).
+   */
+  const std::set<gd::String> &GetUsedRequiredFiles() const {
+    return usedRequiredFiles;
+  }
+
+  /**
+   * The extensions used by the project (or part of it).
+   */
+  std::set<gd::String> &GetUsedExtensions() { return usedExtensions; }
+
+  /**
+   * The include files used at runtime by the project (or part of it).
+   */
+  std::set<gd::String> &GetUsedIncludeFiles() { return usedIncludeFiles; }
+
+  /**
+   * The additional files required at runtime by the project (or part of it).
+   */
+  std::set<gd::String> &GetUsedRequiredFiles() { return usedRequiredFiles; }
+
+private:
+  std::set<gd::String> usedExtensions;
+  std::set<gd::String> usedIncludeFiles;
+  std::set<gd::String> usedRequiredFiles;
+};
+
 class GD_CORE_API UsedExtensionsFinder
     : public ArbitraryObjectsWorker,
       public ArbitraryEventsWorkerWithContext,
       public ExpressionParser2NodeWorker {
  public:
-  static std::set<gd::String> ScanProject(gd::Project& project);
+  static const UsedExtensionsResult ScanProject(gd::Project& project);
 
  private:
   UsedExtensionsFinder(gd::Project& project_) : project(project_){};
   gd::Project& project;
   gd::String rootType;
-  std::set<gd::String> usedExtensions;
+  UsedExtensionsResult result;
 
   // Object Visitor
   void DoVisitObject(gd::Object& object) override;

Core/GDCore/IDE/EventsFunctionTools.cpp

@@ -20,6 +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) {
@@ -31,8 +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();
 }
 
@@ -44,6 +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);
@@ -81,6 +87,7 @@ void EventsFunctionTools::ObjectEventsFunctionToObjectsContainer(
     gd::ObjectsContainer& outputObjectsContainer) {
   // The context is build the same way as free function...
   FreeEventsFunctionToObjectsContainer(project,
+                                       eventsBasedObject.GetEventsFunctions(),
                                        eventsFunction,
                                        outputGlobalObjectsContainer,
                                        outputObjectsContainer);

Core/GDCore/IDE/EventsFunctionTools.h

@@ -10,6 +10,7 @@
 #include "GDCore/String.h"
 namespace gd {
 class Project;
+class EventsFunctionsContainer;
 class ObjectsContainer;
 class ParameterMetadata;
 class EventsFunction;
@@ -34,6 +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);

Core/GDCore/IDE/Project/ArbitraryBehaviorSharedDataWorker.cpp

@@ -0,0 +1,37 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#include "ArbitraryBehaviorSharedDataWorker.h"
+
+#include <iostream>
+#include <map>
+#include <memory>
+#include <vector>
+
+#include "GDCore/Project/BehaviorsSharedData.h"
+#include "GDCore/String.h"
+
+using namespace std;
+
+namespace gd {
+
+ArbitraryBehaviorSharedDataWorker::~ArbitraryBehaviorSharedDataWorker() {}
+
+void ArbitraryBehaviorSharedDataWorker::VisitSharedDatas(
+    const std::map<gd::String, std::unique_ptr<gd::BehaviorsSharedData>>
+        &sharedDatas) {
+  DoVisitSharedDatas(sharedDatas);
+
+  for (auto &behaviorSharedDataContent : sharedDatas) {
+    VisitSharedData(*behaviorSharedDataContent.second);
+  }
+}
+
+void ArbitraryBehaviorSharedDataWorker::VisitSharedData(
+    gd::BehaviorsSharedData &sharedData) {
+  DoVisitSharedData(sharedData);
+}
+
+} // namespace gd

Core/GDCore/IDE/Project/ArbitraryBehaviorSharedDataWorker.h

@@ -0,0 +1,55 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+
+#pragma once
+
+#include <map>
+#include <memory>
+#include <vector>
+
+#include "GDCore/String.h"
+#include "GDCore/Tools/SerializableWithNameList.h"
+
+namespace gd {
+class BehaviorsSharedData;
+}  // namespace gd
+
+namespace gd {
+
+/**
+ * \brief ArbitraryBehaviorSharedDataWorker is an abstract class used to browse
+ * shared data and do some work on them. It can be used to implement
+ * refactoring for example.
+ *
+ * \ingroup IDE
+ */
+class GD_CORE_API ArbitraryBehaviorSharedDataWorker {
+ public:
+  ArbitraryBehaviorSharedDataWorker(){};
+  virtual ~ArbitraryBehaviorSharedDataWorker();
+
+  /**
+   * \brief Launch the worker on the specified shared data.
+   */
+  void Launch(const std::map<gd::String, std::unique_ptr<gd::BehaviorsSharedData>>& sharedDatas) { VisitSharedDatas(sharedDatas); };
+
+ private:
+  void VisitSharedDatas(const std::map<gd::String, std::unique_ptr<gd::BehaviorsSharedData>>& sharedDatas);
+  void VisitSharedData(gd::BehaviorsSharedData& behavior);
+
+  /**
+   * Called to do some work on shared data.
+   */
+  virtual void DoVisitSharedDatas(const std::map<gd::String, std::unique_ptr<gd::BehaviorsSharedData>>& sharedDatas){};
+
+  /**
+   * Called to do some work on a shared data.
+   */
+  virtual void DoVisitSharedData(gd::BehaviorsSharedData& sharedData){};
+};
+
+}  // namespace gd
+

Core/GDCore/IDE/Project/ArbitraryEventBasedBehaviorsWorker.cpp

@@ -0,0 +1,34 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#include "ArbitraryEventBasedBehaviorsWorker.h"
+
+#include <iostream>
+#include <map>
+#include <memory>
+#include <vector>
+
+#include "GDCore/Project/EventsBasedBehavior.h"
+#include "GDCore/String.h"
+
+using namespace std;
+
+namespace gd {
+
+ArbitraryEventBasedBehaviorsWorker::~ArbitraryEventBasedBehaviorsWorker() {}
+
+void ArbitraryEventBasedBehaviorsWorker::VisitEventBasedBehaviors(gd::SerializableWithNameList<gd::EventsBasedBehavior>& behaviors) {
+  DoVisitEventBasedBehaviors(behaviors);
+
+    for (auto&& eventsBasedBehavior : behaviors.GetInternalVector()) {
+      VisitEventBasedBehavior(*eventsBasedBehavior);
+    }
+}
+
+void ArbitraryEventBasedBehaviorsWorker::VisitEventBasedBehavior(gd::EventsBasedBehavior& behavior) {
+  DoVisitEventBasedBehavior(behavior);
+}
+
+}  // namespace gd

Core/GDCore/IDE/Project/ArbitraryEventBasedBehaviorsWorker.h

@@ -0,0 +1,59 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+
+#pragma once
+
+#include <map>
+#include <memory>
+#include <vector>
+
+#include "GDCore/String.h"
+#include "GDCore/Tools/SerializableWithNameList.h"
+
+namespace gd {
+class EventsBasedBehavior;
+}  // namespace gd
+
+namespace gd {
+
+/**
+ * \brief ArbitraryEventsFunctionsWorker is an abstract class used to browse
+ * event-based behaviors and do some work on them. It can be used to implement
+ * refactoring for example.
+ *
+ * \ingroup IDE
+ */
+class GD_CORE_API ArbitraryEventBasedBehaviorsWorker {
+ public:
+  ArbitraryEventBasedBehaviorsWorker(){};
+  virtual ~ArbitraryEventBasedBehaviorsWorker();
+
+  /**
+   * \brief Launch the worker on the specified event-based behaviors.
+   */
+  void Launch(gd::SerializableWithNameList<gd::EventsBasedBehavior>& behaviors) { VisitEventBasedBehaviors(behaviors); };
+
+  /**
+   * \brief Launch the worker on the specified event-based behavior.
+   */
+  void Launch(EventsBasedBehavior& behavior) { VisitEventBasedBehavior(behavior); };
+
+ private:
+  void VisitEventBasedBehaviors(gd::SerializableWithNameList<gd::EventsBasedBehavior>& behaviors);
+  void VisitEventBasedBehavior(gd::EventsBasedBehavior& behavior);
+
+  /**
+   * Called to do some work on event-based behaviors.
+   */
+  virtual void DoVisitEventBasedBehaviors(gd::SerializableWithNameList<gd::EventsBasedBehavior>& behaviors){};
+
+  /**
+   * Called to do some work on an event-based behavior.
+   */
+  virtual void DoVisitEventBasedBehavior(gd::EventsBasedBehavior& behavior){};
+};
+
+}  // namespace gd

Core/GDCore/IDE/Project/ArbitraryEventsFunctionsWorker.cpp

@@ -0,0 +1,37 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#include "ArbitraryEventsFunctionsWorker.h"
+
+#include <iostream>
+#include <map>
+#include <memory>
+#include <vector>
+
+#include "GDCore/Project/EventsFunction.h"
+#include "GDCore/Project/EventsFunctionsContainer.h"
+#include "GDCore/Extensions/Metadata/ParameterMetadata.h"
+#include "GDCore/String.h"
+
+using namespace std;
+
+namespace gd {
+
+ArbitraryEventsFunctionsWorker::~ArbitraryEventsFunctionsWorker() {}
+
+void ArbitraryEventsFunctionsWorker::VisitEventsFunctionContainer(
+    gd::EventsFunctionsContainer& functions) {
+  DoVisitEventsFunctionsContainer(functions);
+
+  for (auto&& function : functions.GetInternalVector()) {
+    VisitEventsFunction(*function);
+  }
+}
+
+void ArbitraryEventsFunctionsWorker::VisitEventsFunction(gd::EventsFunction& eventsFunction) {
+  DoVisitEventsFunction(eventsFunction);
+}
+
+}  // namespace gd

Core/GDCore/IDE/Project/ArbitraryEventsFunctionsWorker.h

@@ -0,0 +1,55 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+
+#pragma once
+
+#include <map>
+#include <memory>
+#include <vector>
+
+#include "GDCore/String.h"
+
+namespace gd {
+class EventsFunction;
+class EventsFunctionsContainer;
+class ParameterMetadata;
+}  // namespace gd
+
+namespace gd {
+
+/**
+ * \brief ArbitraryEventsFunctionsWorker is an abstract class used to browse
+ * functions signatures and do some work on them. It can be used to implement
+ * refactoring for example.
+ *
+ * \ingroup IDE
+ */
+class GD_CORE_API ArbitraryEventsFunctionsWorker {
+ public:
+  ArbitraryEventsFunctionsWorker(){};
+  virtual ~ArbitraryEventsFunctionsWorker();
+
+  /**
+   * \brief Launch the worker on the specified function container.
+   */
+  void Launch(gd::EventsFunctionsContainer& functions) { VisitEventsFunctionContainer(functions); };
+
+ private:
+  void VisitEventsFunctionContainer(gd::EventsFunctionsContainer& functions);
+  void VisitEventsFunction(gd::EventsFunction& eventsFunction);
+
+  /**
+   * Called to do some work on an function container.
+   */
+  virtual void DoVisitEventsFunctionsContainer(gd::EventsFunctionsContainer& functions){};
+
+  /**
+   * Called to do some work on a function.
+   */
+  virtual void DoVisitEventsFunction(gd::EventsFunction& eventsFunction){};
+};
+
+}  // namespace gd

Core/GDCore/IDE/Project/ArbitraryObjectsWorker.h

@@ -33,7 +33,7 @@ class GD_CORE_API ArbitraryObjectsWorker {
   virtual ~ArbitraryObjectsWorker();
 
   /**
-   * \brief Launch the worker on the specified events list.
+   * \brief Launch the worker on the specified object container.
    */
   void Launch(gd::ObjectsContainer& objects) { VisitObjectContainer(objects); };
 

Core/GDCore/IDE/Project/ArbitraryResourceWorker.cpp

@@ -35,6 +35,16 @@ void ArbitraryResourceWorker::ExposeJson(gd::String& jsonName){
     // do.
 };
 
+void ArbitraryResourceWorker::ExposeTilemap(gd::String& tilemapName){
+    // Nothing to do by default - each child class can define here the action to
+    // do.
+};
+
+void ArbitraryResourceWorker::ExposeTileset(gd::String& tilesetName){
+    // Nothing to do by default - each child class can define here the action to
+    // do.
+};
+
 void ArbitraryResourceWorker::ExposeVideo(gd::String& videoName){
     // Nothing to do by default - each child class can define here the action to
     // do.
@@ -92,6 +102,67 @@ void ArbitraryResourceWorker::ExposeResources(
   }
 }
 
+void ArbitraryResourceWorker::ExposeEmbeddeds(gd::String& resourceName) {
+  if (resourcesManagers.empty()) return;
+  gd::ResourcesManager* resourcesManager = resourcesManagers[0];
+
+  gd::Resource& resource = resourcesManager->GetResource(resourceName);
+
+  if (!resource.GetMetadata().empty()) {
+    gd::SerializerElement serializerElement =
+        gd::Serializer::FromJSON(resource.GetMetadata());
+
+    if (serializerElement.HasChild("embeddedResourcesMapping")) {
+      bool anyEmbeddedResourceNameWasRenamed = false;
+      gd::SerializerElement& embeddedResourcesMappingElement =
+          serializerElement.GetChild("embeddedResourcesMapping");
+
+      for (const auto& child :
+           embeddedResourcesMappingElement.GetAllChildren()) {
+        const gd::String& targetResourceName =
+            child.second->GetValue().GetString();
+
+        if (resourcesManager->HasResource(targetResourceName)) {
+          std::cout << targetResourceName << std::endl;
+          gd::Resource& targetResource =
+              resourcesManager->GetResource(targetResourceName);
+          const gd::String& targetResourceKind = targetResource.GetKind();
+
+          gd::String potentiallyUpdatedTargetResourceName = targetResourceName;
+
+          if (targetResourceKind == "audio") {
+            ExposeAudio(potentiallyUpdatedTargetResourceName);
+          } else if (targetResourceKind == "bitmapFont") {
+            ExposeBitmapFont(potentiallyUpdatedTargetResourceName);
+          } else if (targetResourceKind == "font") {
+            ExposeFont(potentiallyUpdatedTargetResourceName);
+          } else if (targetResourceKind == "image") {
+            ExposeImage(potentiallyUpdatedTargetResourceName);
+          } else if (targetResourceKind == "json") {
+            ExposeJson(potentiallyUpdatedTargetResourceName);
+          } else if (targetResourceKind == "tilemap") {
+            ExposeTilemap(potentiallyUpdatedTargetResourceName);
+          } else if (targetResourceKind == "tileset") {
+            ExposeTileset(potentiallyUpdatedTargetResourceName);
+          } else if (targetResourceKind == "video") {
+            ExposeVideo(potentiallyUpdatedTargetResourceName);
+          }
+
+          if (potentiallyUpdatedTargetResourceName != targetResourceName) {
+            // The resource name was renamed. Also update the mapping.
+            child.second->SetStringValue(potentiallyUpdatedTargetResourceName);
+            anyEmbeddedResourceNameWasRenamed = true;
+          }
+        }
+      }
+
+      if (anyEmbeddedResourceNameWasRenamed) {
+        resource.SetMetadata(gd::Serializer::ToJSON(serializerElement));
+      }
+    }
+  }
+}
+
 void ArbitraryResourceWorker::ExposeResource(gd::Resource& resource) {
   if (!resource.UseFile()) return;
 
@@ -154,6 +225,14 @@ class ResourceWorkerInEventsWorker : public ArbitraryEventsWorker {
             gd::String updatedParameterValue = parameterValue;
             worker.ExposeJson(updatedParameterValue);
             instruction.SetParameter(parameterIndex, updatedParameterValue);
+          } else if (parameterMetadata.GetType() == "tilemapResource") {
+            gd::String updatedParameterValue = parameterValue;
+            worker.ExposeTilemap(updatedParameterValue);
+            instruction.SetParameter(parameterIndex, updatedParameterValue);
+          } else if (parameterMetadata.GetType() == "tilesetResource") {
+            gd::String updatedParameterValue = parameterValue;
+            worker.ExposeTileset(updatedParameterValue);
+            instruction.SetParameter(parameterIndex, updatedParameterValue);
           }
         });
 

Core/GDCore/IDE/Project/ArbitraryResourceWorker.h

@@ -75,6 +75,16 @@ class GD_CORE_API ArbitraryResourceWorker {
    */
   virtual void ExposeJson(gd::String &jsonName);
 
+  /**
+   * \brief Expose a Tilemap, which is always a reference to a "tilemap" resource.
+   */
+  virtual void ExposeTilemap(gd::String &tilemapName);
+
+  /**
+   * \brief Expose a Tileset, which is always a reference to a "tileset" resource.
+   */
+  virtual void ExposeTileset(gd::String &tilesetName);
+
   /**
    * \brief Expose a video, which is always a reference to a "video" resource.
    */
@@ -96,6 +106,11 @@ class GD_CORE_API ArbitraryResourceWorker {
    */
   virtual void ExposeFile(gd::String &resourceFileName) = 0;
 
+  /**
+   * \brief Expose the embedded resources of the specified resource.
+   */
+  virtual void ExposeEmbeddeds(gd::String &resourceName);
+
  protected:
   const std::vector<gd::ResourcesManager *> &GetResources() {
     return resourcesManagers;

Core/GDCore/IDE/Project/BehaviorObjectTypeRenamer.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 "BehaviorObjectTypeRenamer.h"
+
+#include "GDCore/Project/EventsBasedBehavior.h"
+#include "GDCore/String.h"
+#include <map>
+#include <memory>
+#include <vector>
+
+namespace gd {
+
+void BehaviorObjectTypeRenamer::DoVisitEventBasedBehavior(
+    gd::EventsBasedBehavior &eventsBasedBehavior) {
+  if (eventsBasedBehavior.GetObjectType() == oldObjectType) {
+    eventsBasedBehavior.SetObjectType(newObjectType);
+  }
+}
+
+BehaviorObjectTypeRenamer::~BehaviorObjectTypeRenamer() {}
+
+} // namespace gd

Core/GDCore/IDE/Project/BehaviorObjectTypeRenamer.h

@@ -0,0 +1,45 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#ifndef GDCORE_BEHAVIOROBJECTTYPERENAMER_H
+#define GDCORE_BEHAVIOROBJECTTYPERENAMER_H
+
+#include "GDCore/IDE/Project/ArbitraryEventBasedBehaviorsWorker.h"
+
+#include "GDCore/String.h"
+#include <map>
+#include <memory>
+#include <vector>
+namespace gd {
+class BaseEvent;
+class Project;
+class EventsList;
+} // namespace gd
+
+namespace gd {
+
+/**
+ * \brief Rename the object type in event-based behaviors.
+ *
+ * \ingroup IDE
+ */
+class GD_CORE_API BehaviorObjectTypeRenamer
+    : public ArbitraryEventBasedBehaviorsWorker {
+public:
+  BehaviorObjectTypeRenamer(const gd::String &oldObjectType_,
+                            const gd::String &newObjectType_)
+      : oldObjectType(oldObjectType_), newObjectType(newObjectType_){};
+  virtual ~BehaviorObjectTypeRenamer();
+
+private:
+  void DoVisitEventBasedBehavior(gd::EventsBasedBehavior &behavior) override;
+
+  gd::String oldObjectType;
+  gd::String newObjectType;
+};
+
+} // namespace gd
+
+#endif // GDCORE_BEHAVIOROBJECTTYPERENAMER_H

Core/GDCore/IDE/Project/BehaviorsSharedDataBehaviorTypeRenamer.cpp

@@ -0,0 +1,24 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#include "GDCore/IDE/Project/BehaviorsSharedDataBehaviorTypeRenamer.h"
+#include "GDCore/Project/BehaviorsSharedData.h"
+#include "GDCore/String.h"
+#include <map>
+#include <memory>
+#include <vector>
+
+namespace gd {
+
+void BehaviorsSharedDataBehaviorTypeRenamer::DoVisitSharedData(
+    gd::BehaviorsSharedData &sharedData) {
+  if (sharedData.GetTypeName() == oldBehaviorType) {
+    sharedData.SetTypeName(newBehaviorType);
+  }
+}
+
+BehaviorsSharedDataBehaviorTypeRenamer::~BehaviorsSharedDataBehaviorTypeRenamer() {}
+
+} // namespace gd

Core/GDCore/IDE/Project/BehaviorsSharedDataBehaviorTypeRenamer.h

@@ -0,0 +1,42 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+
+#pragma once
+
+#include <map>
+#include <memory>
+#include <vector>
+#include "GDCore/IDE/Project/ArbitraryBehaviorSharedDataWorker.h"
+#include "GDCore/String.h"
+
+namespace gd {
+class BaseEvent;
+class Project;
+class EventsList;
+}  // namespace gd
+
+namespace gd {
+
+/**
+ * \brief Rename the behavior type of shared data.
+ *
+ * \ingroup IDE
+ */
+class GD_CORE_API BehaviorsSharedDataBehaviorTypeRenamer : public ArbitraryBehaviorSharedDataWorker {
+ public:
+  BehaviorsSharedDataBehaviorTypeRenamer(const gd::String& oldBehaviorType_,
+                                       const gd::String& newBehaviorType_)
+      : oldBehaviorType(oldBehaviorType_), newBehaviorType(newBehaviorType_){};
+  virtual ~BehaviorsSharedDataBehaviorTypeRenamer();
+
+ private:
+  void DoVisitSharedData(gd::BehaviorsSharedData& behavior) override;
+
+  gd::String oldBehaviorType;
+  gd::String newBehaviorType;
+};
+
+}  // namespace gd

Core/GDCore/IDE/Project/FunctionParameterBehaviorTypeRenamer.cpp

@@ -0,0 +1,28 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#include "FunctionParameterBehaviorTypeRenamer.h"
+
+#include "GDCore/Project/EventsFunction.h"
+#include "GDCore/String.h"
+#include <map>
+#include <memory>
+#include <vector>
+
+namespace gd {
+
+void FunctionParameterBehaviorTypeRenamer::DoVisitEventsFunction(
+    gd::EventsFunction &eventsFunction) {
+  for (auto &&parameter : eventsFunction.GetParameters()) {
+    if (gd::ParameterMetadata::IsBehavior(parameter.GetType()) &&
+        parameter.GetExtraInfo() == oldBehaviorType) {
+      parameter.SetExtraInfo(newBehaviorType);
+    }
+  }
+}
+
+FunctionParameterBehaviorTypeRenamer::~FunctionParameterBehaviorTypeRenamer() {}
+
+} // namespace gd

Core/GDCore/IDE/Project/FunctionParameterBehaviorTypeRenamer.h

@@ -0,0 +1,42 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#pragma once
+
+#include "GDCore/IDE/Project/ArbitraryEventsFunctionsWorker.h"
+#include "GDCore/String.h"
+#include <map>
+#include <memory>
+#include <vector>
+
+namespace gd {
+class BaseEvent;
+class Project;
+class EventsList;
+} // namespace gd
+
+namespace gd {
+
+/**
+ * \brief Rename the type of behavior parameters in functions.
+ *
+ * \ingroup IDE
+ */
+class GD_CORE_API FunctionParameterBehaviorTypeRenamer
+    : public ArbitraryEventsFunctionsWorker {
+public:
+  FunctionParameterBehaviorTypeRenamer(const gd::String &oldBehaviorType_,
+                                       const gd::String &newBehaviorType_)
+      : oldBehaviorType(oldBehaviorType_), newBehaviorType(newBehaviorType_){};
+  virtual ~FunctionParameterBehaviorTypeRenamer();
+
+private:
+  virtual void DoVisitEventsFunction(gd::EventsFunction &eventsFunction) override;
+
+  gd::String oldBehaviorType;
+  gd::String newBehaviorType;
+};
+
+} // namespace gd

Core/GDCore/IDE/Project/FunctionParameterObjectTypeRenamer.cpp

@@ -0,0 +1,28 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#include "FunctionParameterObjectTypeRenamer.h"
+
+#include "GDCore/Project/EventsFunction.h"
+#include "GDCore/String.h"
+#include <map>
+#include <memory>
+#include <vector>
+
+namespace gd {
+
+void FunctionParameterObjectTypeRenamer::DoVisitEventsFunction(
+    gd::EventsFunction &eventsFunction) {
+  for (auto &&parameter : eventsFunction.GetParameters()) {
+    if (gd::ParameterMetadata::IsObject(parameter.GetType()) &&
+        parameter.GetExtraInfo() == oldObjectType) {
+      parameter.SetExtraInfo(newObjectType);
+    }
+  }
+}
+
+FunctionParameterObjectTypeRenamer::~FunctionParameterObjectTypeRenamer() {}
+
+} // namespace gd

Core/GDCore/IDE/Project/FunctionParameterObjectTypeRenamer.h

@@ -0,0 +1,42 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#pragma once
+
+#include "GDCore/IDE/Project/ArbitraryEventsFunctionsWorker.h"
+#include "GDCore/String.h"
+#include <map>
+#include <memory>
+#include <vector>
+
+namespace gd {
+class BaseEvent;
+class Project;
+class EventsList;
+} // namespace gd
+
+namespace gd {
+
+/**
+ * \brief Rename the type of object parameters in functions.
+ *
+ * \ingroup IDE
+ */
+class GD_CORE_API FunctionParameterObjectTypeRenamer
+    : public ArbitraryEventsFunctionsWorker {
+public:
+  FunctionParameterObjectTypeRenamer(const gd::String &oldObjectType_,
+                                     const gd::String &newObjectType_)
+      : oldObjectType(oldObjectType_), newObjectType(newObjectType_){};
+  virtual ~FunctionParameterObjectTypeRenamer();
+
+private:
+  virtual void DoVisitEventsFunction(gd::EventsFunction &eventsFunction) override;
+
+  gd::String oldObjectType;
+  gd::String newObjectType;
+};
+
+} // namespace gd

Core/GDCore/IDE/Project/RequiredBehaviorRenamer.cpp

@@ -0,0 +1,35 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#include "GDCore/IDE/Project/RequiredBehaviorRenamer.h"
+#include <map>
+#include <memory>
+#include <vector>
+#include "GDCore/Project/EventsBasedBehavior.h"
+#include "GDCore/String.h"
+
+namespace gd {
+
+void RequiredBehaviorRenamer::DoVisitEventBasedBehavior(gd::EventsBasedBehavior& eventsBasedBehavior) {
+  for (size_t i = 0;
+        i < eventsBasedBehavior.GetPropertyDescriptors().GetCount();
+        i++) {
+    NamedPropertyDescriptor& propertyDescriptor =
+        eventsBasedBehavior.GetPropertyDescriptors().Get(i);
+
+        std::vector<gd::String>& extraInfo = propertyDescriptor.GetExtraInfo();
+        if (propertyDescriptor.GetType() == "Behavior" &&
+            extraInfo.size() > 0) {
+          const gd::String& requiredBehaviorType = extraInfo[0];
+          if (requiredBehaviorType == oldBehaviorType) {
+            extraInfo[0] = newBehaviorType;
+          }
+        }
+  }
+}
+
+RequiredBehaviorRenamer::~RequiredBehaviorRenamer() {}
+
+}  // namespace gd

Core/GDCore/IDE/Project/RequiredBehaviorRenamer.h

@@ -0,0 +1,42 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#ifndef GDCORE_REQUIREDBEHAVIORRENAMER_H
+#define GDCORE_REQUIREDBEHAVIORRENAMER_H
+#include <map>
+#include <memory>
+#include <vector>
+#include "GDCore/IDE/Project/ArbitraryEventBasedBehaviorsWorker.h"
+#include "GDCore/String.h"
+namespace gd {
+class BaseEvent;
+class Project;
+class EventsList;
+}  // namespace gd
+
+namespace gd {
+
+/**
+ * \brief Rename the type of required behavior in event-based behaviors.
+ *
+ * \ingroup IDE
+ */
+class GD_CORE_API RequiredBehaviorRenamer : public ArbitraryEventBasedBehaviorsWorker {
+ public:
+  RequiredBehaviorRenamer(const gd::String& oldBehaviorType_,
+                                       const gd::String& newBehaviorType_)
+      : oldBehaviorType(oldBehaviorType_), newBehaviorType(newBehaviorType_){};
+  virtual ~RequiredBehaviorRenamer();
+
+ private:
+  void DoVisitEventBasedBehavior(gd::EventsBasedBehavior& behavior) override;
+
+  gd::String oldBehaviorType;
+  gd::String newBehaviorType;
+};
+
+}  // namespace gd
+
+#endif  // GDCORE_REQUIREDBEHAVIORRENAMER_H

Core/GDCore/IDE/Project/ResourcesInUseHelper.h

@@ -40,6 +40,8 @@ class ResourcesInUseHelper : public gd::ArbitraryResourceWorker {
   std::set<gd::String>& GetAllAudios() { return GetAll("audio"); };
   std::set<gd::String>& GetAllFonts() { return GetAll("font"); };
   std::set<gd::String>& GetAllJsons() { return GetAll("json"); };
+  std::set<gd::String>& GetAllTilemaps() { return GetAll("tilemap"); };
+  std::set<gd::String>& GetAllTilesets() { return GetAll("tileset"); };
   std::set<gd::String>& GetAllVideos() { return GetAll("video"); };
   std::set<gd::String>& GetAllBitmapFonts() { return GetAll("bitmapFont"); };
   std::set<gd::String>& GetAll(const gd::String& resourceType) {
@@ -47,6 +49,8 @@ class ResourcesInUseHelper : public gd::ArbitraryResourceWorker {
     if (resourceType == "audio") return allAudios;
     if (resourceType == "font") return allFonts;
     if (resourceType == "json") return allJsons;
+    if (resourceType == "tilemap") return allTilemaps;
+    if (resourceType == "tileset") return allTilesets;
     if (resourceType == "video") return allVideos;
     if (resourceType == "bitmapFont") return allBitmapFonts;
 
@@ -68,6 +72,12 @@ class ResourcesInUseHelper : public gd::ArbitraryResourceWorker {
   virtual void ExposeJson(gd::String& jsonResourceName) override {
     allJsons.insert(jsonResourceName);
   };
+  virtual void ExposeTilemap(gd::String& tilemapResourceName) override {
+    allTilemaps.insert(tilemapResourceName);
+  };
+  virtual void ExposeTileset(gd::String& tilesetResourceName) override {
+    allTilesets.insert(tilesetResourceName);
+  };
   virtual void ExposeVideo(gd::String& videoResourceName) override {
     allVideos.insert(videoResourceName);
   };
@@ -80,6 +90,8 @@ class ResourcesInUseHelper : public gd::ArbitraryResourceWorker {
   std::set<gd::String> allAudios;
   std::set<gd::String> allFonts;
   std::set<gd::String> allJsons;
+  std::set<gd::String> allTilemaps;
+  std::set<gd::String> allTilesets;
   std::set<gd::String> allVideos;
   std::set<gd::String> allBitmapFonts;
   std::set<gd::String> emptyResources;

Core/GDCore/IDE/Project/ResourcesRenamer.h

@@ -4,9 +4,7 @@
  * reserved. This project is released under the MIT License.
  */
 
-#if defined(GD_IDE_ONLY)
-#ifndef GDCORE_RESOURCESRENAMER_H
-#define GDCORE_RESOURCESRENAMER_H
+#pragma once
 
 #include <set>
 #include <vector>
@@ -49,6 +47,12 @@ class ResourcesRenamer : public gd::ArbitraryResourceWorker {
   virtual void ExposeJson(gd::String& jsonResourceName) override {
     RenameIfNeeded(jsonResourceName);
   };
+  virtual void ExposeTilemap(gd::String& tilemapResourceName) override {
+    RenameIfNeeded(tilemapResourceName);
+  };
+  virtual void ExposeTileset(gd::String& tilesetResourceName) override {
+    RenameIfNeeded(tilesetResourceName);
+  };
   virtual void ExposeVideo(gd::String& videoResourceName) override {
     RenameIfNeeded(videoResourceName);
   };
@@ -66,6 +70,3 @@ class ResourcesRenamer : public gd::ArbitraryResourceWorker {
 };
 
 }  // namespace gd
-
-#endif  // GDCORE_RESOURCESRENAMER_H
-#endif

Core/GDCore/IDE/ProjectBrowser.h

@@ -0,0 +1,89 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+
+#pragma once
+
+namespace gd {
+class Project;
+class String;
+class EventsFunctionsExtension;
+class EventsFunction;
+class EventsBasedBehavior;
+class EventsBasedObject;
+class ArbitraryEventsWorker;
+class ArbitraryEventsWorkerWithContext;
+class ArbitraryEventsFunctionsWorker;
+class ArbitraryObjectsWorker;
+class ArbitraryEventBasedBehaviorsWorker;
+class ArbitraryBehaviorSharedDataWorker;
+} // namespace gd
+
+namespace gd {
+
+/**
+ * \brief Expose a subset of the project to workers.
+ */
+class GD_CORE_API ProjectBrowser {
+public:
+  /**
+   * \brief Call the specified worker on all events of a project subset.
+   *
+   * This should be the preferred way to traverse events of a project.
+   */
+  virtual void ExposeEvents(gd::Project &project,
+                            gd::ArbitraryEventsWorker &worker) const = 0;
+  /**
+   * \brief Call the specified worker on all events of a project subset.
+   *
+   * This should be the preferred way to traverse events of a project.
+   */
+  virtual void
+  ExposeEvents(gd::Project &project,
+               gd::ArbitraryEventsWorkerWithContext &worker) const = 0;
+
+  /**
+   * \brief Call the specified worker on all ObjectContainer of a project subset
+   *
+   * This should be the preferred way to traverse all the objects of a project.
+   */
+  virtual void ExposeObjects(gd::Project &project,
+                             gd::ArbitraryObjectsWorker &worker) const = 0;
+
+  /**
+   * \brief Call the specified worker on all FunctionsContainer of a project
+   * subset.
+   *
+   * This should be the preferred way to traverse all the function signatures
+   * of a project.
+   */
+  virtual void ExposeFunctions(gd::Project &project,
+                               gd::ArbitraryEventsFunctionsWorker &worker) const = 0;
+
+  /**
+   * \brief Call the specified worker on all EventBasedBehavior of a project
+   * subset.
+   *
+   * This should be the preferred way to traverse all the event-based behavior
+   * of a project.
+   */
+  virtual void ExposeEventBasedBehaviors(
+      gd::Project &project,
+      gd::ArbitraryEventBasedBehaviorsWorker &worker) const = 0;
+
+  /**
+   * \brief Call the specified worker on all SharedData of a project subset.
+   *
+   * This should be the preferred way to traverse all the shared data
+   * of a project.
+   */
+  virtual void
+  ExposeBehaviorSharedDatas(gd::Project &project,
+                    gd::ArbitraryBehaviorSharedDataWorker &worker) const = 0;
+
+  virtual ~ProjectBrowser(){};
+};
+
+} // namespace gd

Core/GDCore/IDE/ProjectBrowserHelper.cpp

@@ -0,0 +1,224 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#include "ProjectBrowserHelper.h"
+
+#include "GDCore/IDE/Events/ArbitraryEventsWorker.h"
+#include "GDCore/IDE/EventsFunctionTools.h"
+#include "GDCore/IDE/Project/ArbitraryEventBasedBehaviorsWorker.h"
+#include "GDCore/IDE/Project/ArbitraryEventsFunctionsWorker.h"
+#include "GDCore/IDE/Project/ArbitraryObjectsWorker.h"
+#include "GDCore/IDE/Project/ArbitraryBehaviorSharedDataWorker.h"
+#include "GDCore/Project/EventsBasedBehavior.h"
+#include "GDCore/Project/EventsBasedObject.h"
+#include "GDCore/Project/EventsFunctionsExtension.h"
+#include "GDCore/Project/ExternalEvents.h"
+#include "GDCore/Project/Layout.h"
+#include "GDCore/Project/Project.h"
+#include "GDCore/String.h"
+
+namespace gd {
+
+void ProjectBrowserHelper::ExposeProjectEvents(
+    gd::Project &project, gd::ArbitraryEventsWorker &worker) {
+  // See also gd::Project::ExposeResources for a method that traverses the whole
+  // project (this time for resources).
+
+  ExposeProjectEventsWithoutExtensions(project, worker);
+
+  // Add events based extensions
+  for (std::size_t e = 0; e < project.GetEventsFunctionsExtensionsCount();
+       e++) {
+    // Add (free) events functions
+    auto &eventsFunctionsExtension = project.GetEventsFunctionsExtension(e);
+    for (auto &&eventsFunction : eventsFunctionsExtension.GetInternalVector()) {
+      worker.Launch(eventsFunction->GetEvents());
+    }
+
+    // Add (behavior) events functions
+    for (auto &&eventsBasedBehavior :
+         eventsFunctionsExtension.GetEventsBasedBehaviors()
+             .GetInternalVector()) {
+      ExposeEventsBasedBehaviorEvents(project, *eventsBasedBehavior, worker);
+    }
+
+    // Add (object) events functions
+    for (auto &&eventsBasedObject :
+         eventsFunctionsExtension.GetEventsBasedObjects().GetInternalVector()) {
+      auto &objectEventsFunctions = eventsBasedObject->GetEventsFunctions();
+      for (auto &&eventsFunction : objectEventsFunctions.GetInternalVector()) {
+        worker.Launch(eventsFunction->GetEvents());
+      }
+    }
+  }
+}
+
+void ProjectBrowserHelper::ExposeProjectEventsWithoutExtensions(
+    gd::Project& project, gd::ArbitraryEventsWorker& worker) {
+  // Add layouts events
+  for (std::size_t s = 0; s < project.GetLayoutsCount(); s++) {
+    worker.Launch(project.GetLayout(s).GetEvents());
+  }
+  // Add external events events
+  for (std::size_t s = 0; s < project.GetExternalEventsCount(); s++) {
+    worker.Launch(project.GetExternalEvents(s).GetEvents());
+  }
+}
+
+void ProjectBrowserHelper::ExposeProjectEvents(
+    gd::Project &project, gd::ArbitraryEventsWorkerWithContext &worker) {
+  // See also gd::Project::ExposeResources for a method that traverse the whole
+  // project (this time for resources) and ExposeProjectEffects (this time for
+  // effects).
+
+  // Add layouts events
+  for (std::size_t s = 0; s < project.GetLayoutsCount(); s++) {
+    auto &layout = project.GetLayout(s);
+    worker.Launch(layout.GetEvents(), project, layout);
+  }
+  // Add external events events
+  for (std::size_t s = 0; s < project.GetExternalEventsCount(); s++) {
+    const auto &externalEvents = project.GetExternalEvents(s);
+    const gd::String &associatedLayout = externalEvents.GetAssociatedLayout();
+    if (project.HasLayoutNamed(associatedLayout)) {
+      worker.Launch(project.GetExternalEvents(s).GetEvents(), project,
+                    project.GetLayout(associatedLayout));
+    }
+  }
+  // Add events based extensions
+  for (std::size_t e = 0; e < project.GetEventsFunctionsExtensionsCount();
+       e++) {
+    // Add (free) events functions
+    auto &eventsFunctionsExtension = project.GetEventsFunctionsExtension(e);
+    for (auto &&eventsFunction : eventsFunctionsExtension.GetInternalVector()) {
+      gd::ObjectsContainer globalObjectsAndGroups;
+      gd::ObjectsContainer objectsAndGroups;
+      gd::EventsFunctionTools::FreeEventsFunctionToObjectsContainer(
+          project, eventsFunctionsExtension, *eventsFunction,
+          globalObjectsAndGroups, objectsAndGroups);
+
+      worker.Launch(eventsFunction->GetEvents(), globalObjectsAndGroups,
+                    objectsAndGroups);
+    }
+
+    // Add (behavior) events functions
+    for (auto &&eventsBasedBehavior :
+         eventsFunctionsExtension.GetEventsBasedBehaviors()
+             .GetInternalVector()) {
+      ExposeEventsBasedBehaviorEvents(project, *eventsBasedBehavior, worker);
+    }
+
+    // Add (object) events functions
+    for (auto &&eventsBasedObject :
+         eventsFunctionsExtension.GetEventsBasedObjects().GetInternalVector()) {
+      ExposeEventsBasedObjectEvents(project, *eventsBasedObject, worker);
+    }
+  }
+}
+
+void ProjectBrowserHelper::ExposeEventsBasedBehaviorEvents(
+    gd::Project &project, const gd::EventsBasedBehavior &eventsBasedBehavior,
+    gd::ArbitraryEventsWorker &worker) {
+  auto &behaviorEventsFunctions = eventsBasedBehavior.GetEventsFunctions();
+  for (auto &&eventsFunction : behaviorEventsFunctions.GetInternalVector()) {
+    worker.Launch(eventsFunction->GetEvents());
+  }
+}
+
+void ProjectBrowserHelper::ExposeEventsBasedBehaviorEvents(
+    gd::Project &project, const gd::EventsBasedBehavior &eventsBasedBehavior,
+    gd::ArbitraryEventsWorkerWithContext &worker) {
+  auto &behaviorEventsFunctions = eventsBasedBehavior.GetEventsFunctions();
+  for (auto &&eventsFunction : behaviorEventsFunctions.GetInternalVector()) {
+    gd::ObjectsContainer globalObjectsAndGroups;
+    gd::ObjectsContainer objectsAndGroups;
+    gd::EventsFunctionTools::BehaviorEventsFunctionToObjectsContainer(
+        project, eventsBasedBehavior, *eventsFunction, globalObjectsAndGroups,
+        objectsAndGroups);
+
+    worker.Launch(eventsFunction->GetEvents(), globalObjectsAndGroups,
+                  objectsAndGroups);
+  }
+}
+
+void ProjectBrowserHelper::ExposeEventsBasedObjectEvents(
+    gd::Project &project, const gd::EventsBasedObject &eventsBasedObject,
+    gd::ArbitraryEventsWorkerWithContext &worker) {
+  auto &objectEventsFunctions = eventsBasedObject.GetEventsFunctions();
+  for (auto &&eventsFunction : objectEventsFunctions.GetInternalVector()) {
+    gd::ObjectsContainer globalObjectsAndGroups;
+    gd::ObjectsContainer objectsAndGroups;
+    gd::EventsFunctionTools::ObjectEventsFunctionToObjectsContainer(
+        project, eventsBasedObject, *eventsFunction, globalObjectsAndGroups,
+        objectsAndGroups);
+
+    worker.Launch(eventsFunction->GetEvents(), globalObjectsAndGroups,
+                  objectsAndGroups);
+  }
+}
+
+void ProjectBrowserHelper::ExposeProjectObjects(
+    gd::Project &project, gd::ArbitraryObjectsWorker &worker) {
+
+  // Global objects
+  worker.Launch(project);
+
+  // Layers objects
+  for (size_t i = 0; i < project.GetLayoutsCount(); i++) {
+    worker.Launch(project.GetLayout(i));
+  }
+
+  // Event based objects children
+  for (std::size_t e = 0; e < project.GetEventsFunctionsExtensionsCount();
+       e++) {
+    auto &eventsFunctionsExtension = project.GetEventsFunctionsExtension(e);
+
+    for (auto &&eventsBasedObjectUniquePtr :
+         eventsFunctionsExtension.GetEventsBasedObjects().GetInternalVector()) {
+      auto eventsBasedObject = eventsBasedObjectUniquePtr.get();
+      worker.Launch(*eventsBasedObject);
+    }
+  }
+};
+
+void ProjectBrowserHelper::ExposeProjectFunctions(
+    gd::Project &project, gd::ArbitraryEventsFunctionsWorker &worker) {
+
+  for (std::size_t e = 0; e < project.GetEventsFunctionsExtensionsCount();
+       e++) {
+    auto &eventsFunctionsExtension = project.GetEventsFunctionsExtension(e);
+    worker.Launch(eventsFunctionsExtension);
+
+    for (auto &&eventsBasedBehavior :
+         eventsFunctionsExtension.GetEventsBasedBehaviors()
+             .GetInternalVector()) {
+      worker.Launch(eventsBasedBehavior->GetEventsFunctions());
+    }
+
+    for (auto &&eventsBasedObject :
+         eventsFunctionsExtension.GetEventsBasedObjects().GetInternalVector()) {
+      worker.Launch(eventsBasedObject->GetEventsFunctions());
+    }
+  }
+};
+
+void ProjectBrowserHelper::ExposeProjectEventBasedBehaviors(
+    gd::Project &project, gd::ArbitraryEventBasedBehaviorsWorker &worker) {
+  for (std::size_t e = 0; e < project.GetEventsFunctionsExtensionsCount();
+       e++) {
+    auto &eventsFunctionsExtension = project.GetEventsFunctionsExtension(e);
+    worker.Launch(eventsFunctionsExtension.GetEventsBasedBehaviors());
+  }
+}
+
+void ProjectBrowserHelper::ExposeProjectSharedDatas(
+    gd::Project &project, gd::ArbitraryBehaviorSharedDataWorker &worker) {
+  for (std::size_t i = 0; i < project.GetLayoutsCount(); ++i) {
+    gd::Layout &layout = project.GetLayout(i);
+    worker.Launch(layout.GetAllBehaviorSharedData());
+  }
+}
+
+} // namespace gd

Core/GDCore/IDE/ProjectBrowserHelper.h

@@ -0,0 +1,130 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#pragma once
+
+namespace gd {
+class Project;
+class String;
+class EventsFunctionsExtension;
+class EventsFunction;
+class EventsBasedBehavior;
+class EventsBasedObject;
+class ArbitraryEventsWorker;
+class ArbitraryEventsWorkerWithContext;
+class ArbitraryEventsFunctionsWorker;
+class ArbitraryObjectsWorker;
+class ArbitraryEventBasedBehaviorsWorker;
+class ArbitraryBehaviorSharedDataWorker;
+} // namespace gd
+
+namespace gd {
+
+/**
+ * \brief Expose a subset of the project to workers.
+ */
+class GD_CORE_API ProjectBrowserHelper {
+public:
+  /**
+   * \brief Call the specified worker on all events of the project (layout,
+   * external events, events functions...)
+   *
+   * This should be the preferred way to traverse all the events of a project.
+   */
+  static void ExposeProjectEvents(gd::Project &project,
+                                  gd::ArbitraryEventsWorker &worker);
+
+  /**
+   * \brief Call the specified worker on all events of the project (layout,
+   * external events, events functions...)
+   *
+   * This should be the preferred way to traverse all the events of a project.
+   */
+  static void ExposeProjectEvents(gd::Project &project,
+                                  gd::ArbitraryEventsWorkerWithContext &worker);
+
+  /**
+   * \brief Call the specified worker on all events of the project (layout and
+   * external events) but not events from extensions.
+   *
+   * Only use this for stats.
+   */
+  static void
+  ExposeProjectEventsWithoutExtensions(gd::Project &project,
+                                       gd::ArbitraryEventsWorker &worker);
+
+  /**
+   * \brief Call the specified worker on all events of the event-based
+   * behavior
+   *
+   * This should be the preferred way to traverse all the events of an events
+   * based behavior.
+   */
+  static void ExposeEventsBasedBehaviorEvents(
+      gd::Project &project, const gd::EventsBasedBehavior &eventsBasedBehavior,
+      gd::ArbitraryEventsWorker &worker);
+
+  /**
+   * \brief Call the specified worker on all events of the event-based
+   * behavior.
+   *
+   * This should be the preferred way to traverse all the events of an
+   * event-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 event-based
+   * behavior.
+   *
+   * This should be the preferred way to traverse all the events of an
+   * event-based behavior.
+   */
+  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...)
+   *
+   * This should be the preferred way to traverse all the objects of a project.
+   */
+  static void ExposeProjectObjects(gd::Project &project,
+                                   gd::ArbitraryObjectsWorker &worker);
+
+  /**
+   * \brief Call the specified worker on all FunctionsContainers of the project
+   * (global, layouts...)
+   *
+   * This should be the preferred way to traverse all the function signatures
+   * of a project.
+   */
+  static void ExposeProjectFunctions(gd::Project &project,
+                                     gd::ArbitraryEventsFunctionsWorker &worker);
+
+  /**
+   * \brief Call the specified worker on all EventBasedBehavior of a project.
+   *
+   * This should be the preferred way to traverse all the event-based behavior
+   * of a project.
+   */
+  static void ExposeProjectEventBasedBehaviors(
+      gd::Project &project, gd::ArbitraryEventBasedBehaviorsWorker &worker);
+
+  /**
+   * \brief Call the specified worker on all SharedData of a project.
+   *
+   * This should be the preferred way to traverse all the shared data
+   * of a project.
+   */
+  static void ExposeProjectSharedDatas(gd::Project &project,
+                                       gd::ArbitraryBehaviorSharedDataWorker &worker);
+};
+
+} // namespace gd

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

Core/GDCore/IDE/PropertyFunctionGenerator.cpp

@@ -0,0 +1,314 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2022 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#include "PropertyFunctionGenerator.h"
+
+#include "GDCore/Events/Builtin/StandardEvent.h"
+#include "GDCore/Events/Event.h"
+#include "GDCore/Extensions/Metadata/ValueTypeMetadata.h"
+#include "GDCore/Extensions/PlatformExtension.h"
+#include "GDCore/Project/EventsBasedBehavior.h"
+#include "GDCore/Project/EventsBasedObject.h"
+#include "GDCore/Project/EventsFunctionsExtension.h"
+#include "GDCore/Project/EventsFunction.h"
+#include "GDCore/Project/Project.h"
+#include "GDCore/Project/PropertyDescriptor.h"
+#include "GDCore/String.h"
+
+namespace gd {
+
+void PropertyFunctionGenerator::GenerateBehaviorGetterAndSetter(
+    gd::Project &project, gd::EventsFunctionsExtension &extension,
+    gd::EventsBasedBehavior &eventsBasedBehavior,
+    const gd::NamedPropertyDescriptor &property, bool isSharedProperties) {
+  GenerateGetterAndSetter(project, extension, eventsBasedBehavior, property,
+                          eventsBasedBehavior.GetObjectType(), true,
+                          isSharedProperties);
+}
+
+void PropertyFunctionGenerator::GenerateObjectGetterAndSetter(
+    gd::Project &project, gd::EventsFunctionsExtension &extension,
+    gd::EventsBasedObject &eventsBasedObject,
+    const gd::NamedPropertyDescriptor &property) {
+  GenerateGetterAndSetter(project, extension, eventsBasedObject, property, "",
+                          false, false);
+}
+
+void PropertyFunctionGenerator::GenerateGetterAndSetter(
+    gd::Project &project, gd::EventsFunctionsExtension &extension,
+    gd::AbstractEventsBasedEntity &eventsBasedEntity,
+    const gd::NamedPropertyDescriptor &property, const gd::String &objectType,
+    bool isBehavior, bool isSharedProperties) {
+  auto &propertyName = property.GetName();
+  auto &functionsContainer = eventsBasedEntity.GetEventsFunctions();
+  gd::String capitalizedName = CapitalizeFirstLetter(property.GetName());
+  gd::String setterName = "Set" + capitalizedName;
+
+  gd::String functionGroupName =
+      (eventsBasedEntity.GetFullName().empty()
+           ? eventsBasedEntity.GetName()
+           : eventsBasedEntity.GetFullName()) +
+      (property.GetGroup().empty()
+           ? ""
+           : " " + UnCapitalizeFirstLetter(property.GetGroup())) +
+      " configuration";
+
+  gd::String propertyLabel =
+      property.GetLabel().empty() ? property.GetName() : property.GetLabel();
+
+  gd::String descriptionSubject =
+      (property.GetType() == "Boolean" ? "if " : "the ") +
+      UnCapitalizeFirstLetter(propertyLabel) +
+      (isSharedProperties || property.GetType() == "Boolean"
+           ? "."
+           : " of the object.") +
+      (property.GetDescription().empty() ? ""
+                                         : " " + property.GetDescription()) +
+      (isSharedProperties
+           ? " While an object is needed, this will apply to all "
+             "objects using the behavior."
+           : "");
+
+  gd::String propertyGetterName =
+      (isSharedProperties ? "SharedProperty" : "Property") + property.GetName();
+  gd::String getterType =
+      gd::PlatformExtension::GetBehaviorEventsFunctionFullType(
+          extension.GetName(), eventsBasedEntity.GetName(), propertyGetterName);
+  gd::String setterType =
+      gd::PlatformExtension::GetBehaviorEventsFunctionFullType(
+          extension.GetName(), eventsBasedEntity.GetName(),
+          "Set" + propertyGetterName);
+
+  gd::String getterName = capitalizedName;
+  gd::String numberOrString =
+      property.GetType() == "Number" ? "Number" : "String";
+
+  if (!functionsContainer.HasEventsFunctionNamed(getterName)) {
+    auto &getter = functionsContainer.InsertNewEventsFunction(
+        getterName, functionsContainer.GetEventsFunctionsCount());
+    auto &expressionType =
+        gd::ValueTypeMetadata::ConvertPropertyTypeToValueType(
+            property.GetType());
+    // TODO Stop replacing number by expression when it"s handled by the UI
+    // and released.
+    auto &legacyExpressionType =
+        expressionType == "number" ? "expression" : expressionType;
+    getter.GetExpressionType()
+        .SetName(legacyExpressionType)
+        .SetExtraInfo(GetStringifiedExtraInfo(property));
+    getter.SetFullName(propertyLabel).SetGroup(functionGroupName);
+    if (property.GetType() == "Boolean") {
+      getter.SetFunctionType(gd::EventsFunction::Condition)
+          .SetDescription("Check " + descriptionSubject)
+          .SetSentence("_PARAM0_ " + UnCapitalizeFirstLetter(propertyLabel));
+    } else {
+      getter.SetFunctionType(gd::EventsFunction::ExpressionAndCondition)
+          .SetDescription(descriptionSubject)
+          .SetSentence("the " + UnCapitalizeFirstLetter(propertyLabel));
+    }
+
+    auto &event =
+        dynamic_cast<gd::StandardEvent &>(getter.GetEvents().InsertNewEvent(
+            project, "BuiltinCommonInstructions::Standard", 0));
+    if (property.GetType() == "Boolean") {
+      gd::Instruction condition;
+      condition.SetType(getterType);
+      condition.AddParameter("Object");
+      if (isBehavior) {
+        condition.AddParameter("Behavior");
+      }
+      event.GetConditions().Insert(condition, 0);
+
+      gd::Instruction action;
+      action.SetType("SetReturnBoolean");
+      action.AddParameter("True");
+      event.GetActions().Insert(action, 0);
+    } else {
+      gd::Instruction action;
+      action.SetType("SetReturn" + numberOrString);
+      gd::String receiver = isBehavior ? "Object.Behavior::" : "Object.";
+      gd::String propertyPrefix =
+          (isSharedProperties ? "SharedProperty" : "Property");
+      action.AddParameter(receiver + propertyPrefix + property.GetName() +
+                          "()");
+      event.GetActions().Insert(action, 0);
+    }
+  }
+
+  if (!functionsContainer.HasEventsFunctionNamed(setterName)) {
+    auto &setter = functionsContainer.InsertNewEventsFunction(
+        setterName, functionsContainer.GetEventsFunctionsCount());
+    if (property.GetType() == "Boolean") {
+      setter.SetFunctionType(gd::EventsFunction::Action)
+          .SetFullName(propertyLabel)
+          .SetGroup(functionGroupName)
+          .SetDescription("Change " + descriptionSubject)
+          .SetSentence("_PARAM0_ " + UnCapitalizeFirstLetter(propertyLabel) +
+                       (isBehavior ? ": _PARAM2_" : ": _PARAM1_"));
+      gd::ParameterMetadata objectParameter;
+      objectParameter.SetType("object")
+          .SetName("Object")
+          .SetDescription("Object")
+          .SetExtraInfo(objectType);
+      if (!isBehavior) {
+        gd::String objectFullType = gd::PlatformExtension::GetObjectFullType(
+            extension.GetName(), eventsBasedEntity.GetName());
+        objectParameter.SetExtraInfo(objectFullType);
+      }
+      setter.GetParameters().push_back(objectParameter);
+      if (isBehavior) {
+        gd::ParameterMetadata behaviorParameter;
+        gd::String behaviorFullType =
+            gd::PlatformExtension::GetBehaviorFullType(
+                extension.GetName(), eventsBasedEntity.GetName());
+        behaviorParameter.SetType("behavior")
+            .SetName("Behavior")
+            .SetDescription("Behavior")
+            .SetExtraInfo(behaviorFullType);
+        setter.GetParameters().push_back(behaviorParameter);
+      }
+      gd::ParameterMetadata valueParameter;
+      valueParameter.SetType("yesorno")
+          .SetName("Value")
+          .SetDescription(capitalizedName)
+          .SetOptional(true)
+          .SetDefaultValue("yes");
+      setter.GetParameters().push_back(valueParameter);
+    } else {
+      setter.SetFunctionType(gd::EventsFunction::ActionWithOperator);
+      setter.SetGetterName(getterName);
+    }
+
+    if (property.GetType() == "Boolean") {
+      {
+        auto &event =
+            dynamic_cast<gd::StandardEvent &>(setter.GetEvents().InsertNewEvent(
+                project, "BuiltinCommonInstructions::Standard", 0));
+
+        gd::Instruction condition;
+        condition.SetType("GetArgumentAsBoolean");
+        condition.AddParameter("\"Value\"");
+        event.GetConditions().Insert(condition, 0);
+
+        gd::Instruction action;
+        action.SetType(setterType);
+        action.AddParameter("Object");
+        if (isBehavior) {
+          action.AddParameter("Behavior");
+          action.AddParameter("yes");
+        } else {
+          action.AddParameter("yes");
+        }
+        event.GetActions().Insert(action, 0);
+      }
+      {
+        auto &event =
+            dynamic_cast<gd::StandardEvent &>(setter.GetEvents().InsertNewEvent(
+                project, "BuiltinCommonInstructions::Standard", 0));
+
+        gd::Instruction condition;
+        condition.SetType("GetArgumentAsBoolean");
+        condition.AddParameter("\"Value\"");
+        condition.SetInverted(true);
+        event.GetConditions().Insert(condition, 0);
+
+        gd::Instruction action;
+        action.SetType(setterType);
+        action.AddParameter("Object");
+        if (isBehavior) {
+          action.AddParameter("Behavior");
+          action.AddParameter("no");
+        } else {
+          action.AddParameter("no");
+        }
+        event.GetActions().Insert(action, 0);
+      }
+    } else {
+      auto &event =
+          dynamic_cast<gd::StandardEvent &>(setter.GetEvents().InsertNewEvent(
+              project, "BuiltinCommonInstructions::Standard", 0));
+
+      gd::Instruction action;
+      action.SetType(setterType);
+      action.AddParameter("Object");
+      gd::String parameterGetterCall =
+          "GetArgumentAs" + numberOrString + "(\"Value\")";
+      if (isBehavior) {
+        action.AddParameter("Behavior");
+        action.AddParameter("=");
+        action.AddParameter(parameterGetterCall);
+      } else {
+        action.AddParameter("=");
+        action.AddParameter(parameterGetterCall);
+      }
+      event.GetActions().Insert(action, 0);
+    }
+  }
+}
+
+bool PropertyFunctionGenerator::CanGenerateGetterAndSetter(
+    const gd::AbstractEventsBasedEntity &eventsBasedEntity,
+    const gd::NamedPropertyDescriptor &property) {
+  auto &type = property.GetType();
+  if (type != "Boolean" && type != "Number" && type != "String" &&
+      type != "Choice" && type != "Color") {
+    return false;
+  }
+
+  auto &functionsContainer = eventsBasedEntity.GetEventsFunctions();
+  auto getterName = CapitalizeFirstLetter(property.GetName());
+  auto setterName = "Set" + getterName;
+  return !functionsContainer.HasEventsFunctionNamed(setterName) &&
+         !functionsContainer.HasEventsFunctionNamed(getterName);
+};
+
+gd::String PropertyFunctionGenerator::GetStringifiedExtraInfo(
+    const gd::PropertyDescriptor &property) {
+  if (property.GetType() == "Choice") {
+    gd::String arrayString;
+    arrayString += "[";
+    bool isFirst = true;
+    for (const gd::String &choice : property.GetExtraInfo()) {
+      if (!isFirst) {
+        arrayString += ",";
+      }
+      isFirst = false;
+      arrayString += "\"" + choice + "\"";
+    }
+    arrayString += "]";
+    return arrayString;
+  }
+  return "";
+}
+
+gd::String
+PropertyFunctionGenerator::CapitalizeFirstLetter(const gd::String &string) {
+  if (string.empty()) {
+    return string;
+  }
+  return string.substr(0, 1).UpperCase() + string.substr(1);
+}
+
+gd::String
+PropertyFunctionGenerator::UnCapitalizeFirstLetter(const gd::String &string) {
+  if (string.empty()) {
+    return string;
+  }
+  return string.substr(0, 1).LowerCase() + string.substr(1);
+}
+
+void PropertyFunctionGenerator::GenerateConditionSkeleton(
+    gd::Project &project, gd::EventsFunction &eventFunction) {
+  auto &event = dynamic_cast<gd::StandardEvent &>(
+      eventFunction.GetEvents().InsertNewEvent(
+          project, "BuiltinCommonInstructions::Standard", 0));
+
+  gd::Instruction action;
+  action.SetType("SetReturnBoolean");
+  action.AddParameter("True");
+  event.GetActions().Insert(action, 0);
+}
+
+} // namespace gd

Core/GDCore/IDE/PropertyFunctionGenerator.h

@@ -0,0 +1,72 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2022 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#ifndef GDCORE_PROPERTYFUNCTIONGENERATOR_H
+#define GDCORE_PROPERTYFUNCTIONGENERATOR_H
+
+namespace gd {
+class String;
+class Project;
+class EventsFunctionsExtension;
+class EventsFunction;
+class EventsBasedBehavior;
+class EventsBasedObject;
+class AbstractEventsBasedEntity;
+class PropertyDescriptor;
+class NamedPropertyDescriptor;
+} // namespace gd
+
+namespace gd {
+
+/**
+ * \brief Generate a getter and a setter functions for properties.
+ */
+class GD_CORE_API PropertyFunctionGenerator {
+public:
+  /**
+   * \brief Generate a getter and a setter for the given behavior property.
+   */
+  static void GenerateBehaviorGetterAndSetter(
+      gd::Project &project, gd::EventsFunctionsExtension &extension,
+      gd::EventsBasedBehavior &eventsBasedBehavior,
+      const gd::NamedPropertyDescriptor &property, bool isSharedProperties);
+  /**
+   * \brief Generate a getter and a setter for the given object property.
+   */
+  static void
+  GenerateObjectGetterAndSetter(gd::Project &project,
+                                gd::EventsFunctionsExtension &extension,
+                                gd::EventsBasedObject &eventsBasedObject,
+                                const gd::NamedPropertyDescriptor &property);
+  static bool CanGenerateGetterAndSetter(
+      const gd::AbstractEventsBasedEntity &eventsBasedEntity,
+      const gd::NamedPropertyDescriptor &property);
+
+  /**
+   * \brief Generate an event with a "return" action.
+   */
+  static void GenerateConditionSkeleton(gd::Project &project,
+                                        gd::EventsFunction &eventFunction);
+
+  ~PropertyFunctionGenerator();
+
+private:
+  static void GenerateGetterAndSetter(
+      gd::Project &project, gd::EventsFunctionsExtension &extension,
+      gd::AbstractEventsBasedEntity &eventsBasedEntity,
+      const gd::NamedPropertyDescriptor &property, const gd::String &objectType,
+      bool isBehavior, bool isSharedProperties);
+
+  static gd::String CapitalizeFirstLetter(const gd::String &string);
+  static gd::String UnCapitalizeFirstLetter(const gd::String &string);
+  static gd::String
+  GetStringifiedExtraInfo(const gd::PropertyDescriptor &property);
+
+  PropertyFunctionGenerator();
+};
+
+} // namespace gd
+
+#endif // GDCORE_PROPERTYFUNCTIONGENERATOR_H

Core/GDCore/IDE/WholeProjectBrowser.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 "WholeProjectBrowser.h"
+
+#include "GDCore/IDE/Events/ArbitraryEventsWorker.h"
+#include "GDCore/IDE/Project/ArbitraryEventBasedBehaviorsWorker.h"
+#include "GDCore/IDE/Project/ArbitraryEventsFunctionsWorker.h"
+#include "GDCore/IDE/Project/ArbitraryObjectsWorker.h"
+#include "GDCore/IDE/Project/ArbitraryBehaviorSharedDataWorker.h"
+#include "GDCore/IDE/ProjectBrowserHelper.h"
+#include "GDCore/Project/Project.h"
+#include "GDCore/String.h"
+
+namespace gd {
+
+void WholeProjectBrowser::ExposeEvents(
+    gd::Project &project, gd::ArbitraryEventsWorker &worker) const {
+  gd::ProjectBrowserHelper::ExposeProjectEvents(project, worker);
+}
+
+void WholeProjectBrowser::ExposeEvents(
+    gd::Project &project, gd::ArbitraryEventsWorkerWithContext &worker) const {
+  gd::ProjectBrowserHelper::ExposeProjectEvents(project, worker);
+}
+
+void WholeProjectBrowser::ExposeObjects(
+    gd::Project &project, gd::ArbitraryObjectsWorker &worker) const {
+  gd::ProjectBrowserHelper::ExposeProjectObjects(project, worker);
+}
+
+void WholeProjectBrowser::ExposeFunctions(
+    gd::Project &project, gd::ArbitraryEventsFunctionsWorker &worker) const {
+  gd::ProjectBrowserHelper::ExposeProjectFunctions(project, worker);
+}
+
+void WholeProjectBrowser::ExposeEventBasedBehaviors(
+    gd::Project &project,
+    gd::ArbitraryEventBasedBehaviorsWorker &worker) const {
+  gd::ProjectBrowserHelper::ExposeProjectEventBasedBehaviors(project, worker);
+}
+
+void WholeProjectBrowser::ExposeBehaviorSharedDatas(
+    gd::Project &project, gd::ArbitraryBehaviorSharedDataWorker &worker) const {
+  gd::ProjectBrowserHelper::ExposeProjectSharedDatas(project, worker);
+}
+} // namespace gd

Core/GDCore/IDE/WholeProjectBrowser.h

@@ -0,0 +1,90 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#pragma once
+
+#include "GDCore/IDE/ProjectBrowser.h"
+
+namespace gd {
+class Project;
+class String;
+class EventsFunctionsExtension;
+class EventsFunction;
+class EventsBasedBehavior;
+class EventsBasedObject;
+class ArbitraryEventsWorker;
+class ArbitraryEventsWorkerWithContext;
+class ArbitraryEventsFunctionsWorker;
+class ArbitraryObjectsWorker;
+class ArbitraryEventBasedBehaviorsWorker;
+class ArbitraryBehaviorSharedDataWorker;
+} // namespace gd
+
+namespace gd {
+
+/**
+ * \brief Expose the whole project to workers.
+ */
+class GD_CORE_API WholeProjectBrowser : public ProjectBrowser {
+public:
+  /**
+   * \brief Call the specified worker on all events of the project (layout,
+   * external events, events functions...)
+   *
+   * This should be the preferred way to traverse all the events of a project.
+   */
+  void ExposeEvents(gd::Project &project,
+                    gd::ArbitraryEventsWorker &worker) const override;
+
+  /**
+   * \brief Call the specified worker on all events of the project (layout,
+   * external events, events functions...)
+   *
+   * This should be the preferred way to traverse all the events of a project.
+   */
+  void
+  ExposeEvents(gd::Project &project,
+               gd::ArbitraryEventsWorkerWithContext &worker) const override;
+
+  /**
+   * \brief Call the specified worker on all ObjectContainers of the project
+   * (global, layouts...)
+   *
+   * This should be the preferred way to traverse all the objects of a project.
+   */
+  void ExposeObjects(gd::Project &project,
+                     gd::ArbitraryObjectsWorker &worker) const override;
+
+  /**
+   * \brief Call the specified worker on all FunctionsContainers of the project
+   * (global, layouts...)
+   *
+   * This should be the preferred way to traverse all the function signatures
+   * of a project.
+   */
+  void ExposeFunctions(gd::Project &project,
+                       gd::ArbitraryEventsFunctionsWorker &worker) const override;
+
+  /**
+   * \brief Call the specified worker on all EventBasedBehavior of a project.
+   *
+   * This should be the preferred way to traverse all the event-based behavior
+   * of a project.
+   */
+  void ExposeEventBasedBehaviors(
+      gd::Project &project,
+      gd::ArbitraryEventBasedBehaviorsWorker &worker) const override;
+
+  /**
+   * \brief Call the specified worker on all SharedData of a project.
+   *
+   * This should be the preferred way to traverse all the shared data
+   * of a project.
+   */
+  void ExposeBehaviorSharedDatas(gd::Project &project,
+                         gd::ArbitraryBehaviorSharedDataWorker &worker) const override;
+};
+
+} // namespace gd

Core/GDCore/IDE/WholeProjectRefactorer.h

@@ -3,8 +3,8 @@
  * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
  * reserved. This project is released under the MIT License.
  */
-#ifndef GDCORE_WHOLEPROJECTREFACTORER_H
-#define GDCORE_WHOLEPROJECTREFACTORER_H
+#pragma once
+
 #include <set>
 #include <unordered_set>
 #include <vector>
@@ -21,10 +21,14 @@ class EventsBasedBehavior;
 class EventsBasedObject;
 class ArbitraryEventsWorker;
 class ArbitraryObjectsWorker;
+class ArbitraryEventsFunctionsWorker;
 class ArbitraryEventsWorkerWithContext;
+class ArbitraryEventBasedBehaviorsWorker;
+class ArbitraryBehaviorSharedDataWorker;
 class Behavior;
 class BehaviorMetadata;
 class UnfilledRequiredBehaviorPropertyProblem;
+class ProjectBrowser;
 }  // namespace gd
 
 namespace gd {
@@ -39,54 +43,6 @@ namespace gd {
  */
 class GD_CORE_API WholeProjectRefactorer {
  public:
-  /**
-   * \brief Call the specified worker on all events of the project (layout,
-   * external events, events functions...)
-   *
-   * This should be the preferred way to traverse all the events of a project.
-   */
-  static void ExposeProjectEvents(gd::Project& project,
-                                  gd::ArbitraryEventsWorker& worker);
-
-  /**
-   * \brief Call the specified worker on all events of the project (layout,
-   * external events, events functions...)
-   *
-   * This should be the preferred way to traverse all the events of a project.
-   */
-  static void ExposeProjectEvents(gd::Project& project,
-                                  gd::ArbitraryEventsWorkerWithContext& worker);
-
-  /**
-   * \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.
-   */
-  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...)
-   *
-   * This should be the preferred way to traverse all the objects of a project.
-   */
-  static void ExposeProjectObjects(gd::Project& project,
-                                   gd::ArbitraryObjectsWorker& worker);
 
   /**
    * \brief Refactor the project **before** an events function extension is
@@ -102,6 +58,16 @@ class GD_CORE_API WholeProjectRefactorer {
       const gd::String& oldName,
       const gd::String& newName);
 
+  /**
+   * \brief Refactor behavior events after the extension was placed in a new
+   * extension.
+   */
+  static void UpdateExtensionNameInEventsBasedBehavior(
+      gd::Project& project,
+      const gd::EventsFunctionsExtension& eventsFunctionsExtension,
+      gd::EventsBasedBehavior& eventsBasedBehavior,
+      const gd::String& sourceExtensionName);
+
   /**
    * \brief Refactor the project **before** an events function is renamed.
    *
@@ -207,6 +173,21 @@ class GD_CORE_API WholeProjectRefactorer {
       const gd::String& oldPropertyName,
       const gd::String& newPropertyName);
 
+  /**
+   * \brief Refactor the project **before** a shared property of a behavior is
+   * renamed.
+   *
+   * \warning Do the renaming of the specified shared property after calling
+   * this. This is because the shared property is expected to have its old name
+   * for the refactoring.
+   */
+  static void RenameEventsBasedBehaviorSharedProperty(
+      gd::Project& project,
+      const gd::EventsFunctionsExtension& eventsFunctionsExtension,
+      const gd::EventsBasedBehavior& eventsBasedBehavior,
+      const gd::String& oldPropertyName,
+      const gd::String& newPropertyName);
+
   /**
    * \brief Refactor the project **before** a property of an object is
    * renamed.
@@ -424,15 +405,33 @@ class GD_CORE_API WholeProjectRefactorer {
   static void DoRenameEventsFunction(gd::Project& project,
                                      const gd::EventsFunction& eventsFunction,
                                      const gd::String& oldFullType,
-                                     const gd::String& newFullType);
+                                     const gd::String& newFullType,
+                                     const gd::ProjectBrowser& projectBrowser);
 
   static void DoRenameBehavior(gd::Project& project,
                                const gd::String& oldBehaviorType,
-                               const gd::String& newBehaviorType);
+                               const gd::String& newBehaviorType,
+                               const gd::ProjectBrowser& projectBrowser);
 
   static void DoRenameObject(gd::Project& project,
                              const gd::String& oldObjectType,
-                             const gd::String& newObjectType);
+                             const gd::String& newObjectType,
+                             const gd::ProjectBrowser& projectBrowser);
+
+  /**
+   * \brief Refactor the project **before** an events function extension is
+   * renamed.
+   *
+   * \warning Do the renaming of the specified extension after calling this.
+   * This is because the extension is expected to have its old name for the
+   * refactoring.
+   */
+  static void RenameEventsFunctionsExtension(
+      gd::Project& project,
+      const gd::EventsFunctionsExtension& eventsFunctionsExtension,
+      const gd::String& oldName,
+      const gd::String& newName,
+      const gd::ProjectBrowser& projectBrowser);
 
   static void FindDependentBehaviorNames(
       const gd::Project& project,
@@ -447,5 +446,3 @@ class GD_CORE_API WholeProjectRefactorer {
 };
 
 }  // namespace gd
-
-#endif  // GDCORE_WHOLEPROJECTREFACTORER_H

Core/GDCore/Project/AbstractEventsBasedEntity.cpp

@@ -10,8 +10,10 @@
 
 namespace gd {
 
-AbstractEventsBasedEntity::AbstractEventsBasedEntity(const gd::String& _name)
-    : name(_name), fullName("") {}
+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);

Core/GDCore/Project/AbstractEventsBasedEntity.h

@@ -29,7 +29,9 @@ namespace gd {
  */
 class GD_CORE_API AbstractEventsBasedEntity {
  public:
-  AbstractEventsBasedEntity(const gd::String& _name);
+  AbstractEventsBasedEntity(
+      const gd::String& _name,
+      gd::EventsFunctionsContainer::FunctionOwner functionContainerSource);
   virtual ~AbstractEventsBasedEntity(){};
 
   /**
@@ -123,6 +125,11 @@ class GD_CORE_API AbstractEventsBasedEntity {
    */
   static gd::String GetPropertyExpressionName(const gd::String& propertyName) { return "Property" + propertyName; };
 
+  /**
+   * \brief Get the name of the action to toggle a boolean property.
+   */
+  static gd::String GetPropertyToggleActionName(const gd::String& propertyName) { return "ToggleProperty" + propertyName; };
+
   /** \name Serialization
    */
   ///@{
@@ -144,6 +151,7 @@ class GD_CORE_API AbstractEventsBasedEntity {
   gd::String description;
   gd::EventsFunctionsContainer eventsFunctionsContainer;
   SerializableWithNameList<NamedPropertyDescriptor> propertyDescriptors;
+  gd::String extensionName;
 };
 
 }  // namespace gd

Core/GDCore/Project/Behavior.h

@@ -13,7 +13,8 @@ namespace gd {
 
 /**
  * \brief Base class used to represents a behavior that can be applied to an
- * object. It stores the content (i.e: the properties) of a behavior of an object.
+ * object. It stores the content (i.e: the properties) of a behavior of an object
+ * and forward the properties related functions to Javascript with Emscripten.
  *
  * \see gd::BehaviorsSharedData
  * \see gd::Object

Core/GDCore/Project/CustomBehavior.cpp

@@ -11,6 +11,7 @@
 #include "GDCore/Project/PropertyDescriptor.h"
 #include "GDCore/Serialization/Serializer.h"
 #include "GDCore/Serialization/SerializerElement.h"
+#include "GDCore/Project/CustomConfigurationHelper.h"
 
 #include <map>
 
@@ -21,52 +22,26 @@ CustomBehavior *CustomBehavior::Clone() const {
   return clone;
 }
 
+void CustomBehavior::InitializeContent(gd::SerializerElement &behaviorContent) {
+  if (!project.HasEventsBasedBehavior(GetTypeName())) {
+    return;
+  }
+  const auto &eventsBasedBehavior = project.GetEventsBasedBehavior(GetTypeName());
+  const auto &properties = eventsBasedBehavior.GetPropertyDescriptors();
+
+  gd::CustomConfigurationHelper::InitializeContent(properties, behaviorContent);
+}
+
 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())) {
+    auto behaviorProperties = std::map<gd::String, gd::PropertyDescriptor>();
     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;
+  return gd::CustomConfigurationHelper::GetProperties(properties, behaviorContent);
 }
 
 bool CustomBehavior::UpdateProperty(gd::SerializerElement &behaviorContent,
@@ -77,43 +52,10 @@ bool CustomBehavior::UpdateProperty(gd::SerializerElement &behaviorContent,
   }
   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");
-    }
-  }
+  return gd::CustomConfigurationHelper::UpdateProperty(
+      properties,
+      behaviorContent,
+      propertyName,
+      newValue);
 }