Update newIDE README

Add support for drag'n'dropping (multiple) conditions and actions

.clang_format

@@ -0,0 +1 @@
+{BasedOnStyle: Google, BinPackParameters: false, BinPackArguments: false}

.vscode/settings.json

@@ -74,7 +74,9 @@
         "__string": "cpp",
         "cstring": "cpp",
         "iomanip": "cpp",
-        "cstdint": "cpp"
+        "cstdint": "cpp",
+        "forward_list": "cpp",
+        "mutex": "cpp"
     },
     "files.exclude": {
         "Binaries/*build*": true,
@@ -93,5 +95,8 @@
     },
     // Support for Flowtype:
     "javascript.validate.enable": false,
-    "flow.useNPMPackagedFlow": true
+    "flow.useNPMPackagedFlow": true,
+
+    // Clang format styling (duplicated in scripts/CMakeClangUtils.txt)
+    "C_Cpp.clang_format_style": "{BasedOnStyle: Google, BinPackParameters: false, BinPackArguments: false}"
 }

Binaries/Output/Release_Windows/JsPlatform/Extensions/orientation_active.svg

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Binaries/Output/Release_Windows/JsPlatform/Extensions/orientation_alpha.svg

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Core/GDCore/Events/CodeGeneration/EventsCodeGenerator.cpp

@@ -586,7 +586,7 @@ gd::String EventsCodeGenerator::GenerateParameterCodes(
         supplementaryParametersTypes) {
   gd::String argOutput;
 
-  if (metadata.type == "expression" || metadata.type == "camera") {
+  if (ParameterMetadata::IsExpression("number", metadata.type)) {
     CallbacksForGeneratingExpressionCode callbacks(argOutput, *this, context);
 
     gd::ExpressionParser parser(parameter);
@@ -598,9 +598,7 @@ gd::String EventsCodeGenerator::GenerateParameterCodes(
     }
 
     if (argOutput.empty()) argOutput = "0";
-  } else if (metadata.type == "string" || metadata.type == "layer" ||
-             metadata.type == "color" || metadata.type == "file" ||
-             metadata.type == "joyaxis") {
+  } else if (ParameterMetadata::IsExpression("string", metadata.type)) {
     CallbacksForGeneratingExpressionCode callbacks(argOutput, *this, context);
 
     gd::ExpressionParser parser(parameter);
@@ -828,6 +826,7 @@ gd::String EventsCodeGenerator::ConvertToStringExplicit(
 std::vector<gd::String> EventsCodeGenerator::ExpandObjectsName(
     const gd::String& objectName,
     const EventsCodeGenerationContext& context) const {
+  // Note: this logic is duplicated in EventsContextAnalyzer::ExpandObjectsName
   std::vector<gd::String> realObjects;
   if (project.GetObjectGroups().Has(objectName))
     realObjects =

Core/GDCore/Events/CodeGeneration/EventsCodeGenerator.h

@@ -374,6 +374,17 @@ class GD_CORE_API EventsCodeGenerator {
   virtual gd::String GetObjectListName(
       const gd::String& name, const gd::EventsCodeGenerationContext& context);
 
+  /**
+   * \brief Generate the code to notify the profiler of the beginning of a
+   * section.
+   */
+  virtual gd::String GenerateProfilerSectionBegin(const gd::String& section) { return ""; };
+
+  /**
+   * \brief Generate the code to notify the profiler of the end of a section.
+   */
+  virtual gd::String GenerateProfilerSectionEnd(const gd::String& section) { return ""; };
+
  protected:
   /**
    * \brief Generate the code for a single parameter.

Core/GDCore/Events/Parsers/ExpressionParser.cpp

@@ -867,7 +867,7 @@ bool ExpressionParser::PrepareParameter(
     gd::Expression& parameter,
     const gd::ParameterMetadata& parametersInfo,
     const size_t positionInExpression) {
-  if (parametersInfo.type == "expression" || parametersInfo.type == "camera") {
+  if (ParameterMetadata::IsExpression("number", parametersInfo.type)) {
     if (parametersInfo.optional && parameter.GetPlainString().empty())
       parameter = parametersInfo.defaultValue.empty()
                       ? gd::Expression("0")
@@ -879,10 +879,7 @@ bool ExpressionParser::PrepareParameter(
 
       return false;
     }
-  } else if (parametersInfo.type == "string" ||
-             parametersInfo.type == "layer" || parametersInfo.type == "color" ||
-             parametersInfo.type == "file" ||
-             parametersInfo.type == "joyaxis") {
+  } else if (ParameterMetadata::IsExpression("string", parametersInfo.type)) {
     if (parametersInfo.optional && parameter.GetPlainString().empty())
       parameter = parametersInfo.defaultValue.empty()
                       ? gd::Expression("\"\"")

Core/GDCore/Extensions/Builtin/AdvancedExtension.cpp

@@ -11,12 +11,14 @@ namespace gd {
 
 void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAdvancedExtension(
     gd::PlatformExtension& extension) {
-  extension.SetExtensionInformation(
-      "BuiltinAdvanced",
-      _("Advanced control features"),
-      _("Built-in extension providing advanced control features."),
-      "Florian Rival",
-      "Open source (MIT License)");
+  extension
+      .SetExtensionInformation(
+          "BuiltinAdvanced",
+          _("Advanced control features"),
+          _("Built-in extension providing advanced control features."),
+          "Florian Rival",
+          "Open source (MIT License)")
+      .SetExtensionHelpPath("" /*TODO: Add a documentation page for this */);
 
 #if defined(GD_IDE_ONLY)
   extension

Core/GDCore/Extensions/Builtin/AudioExtension.cpp

@@ -11,11 +11,13 @@ namespace gd {
 
 void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
     gd::PlatformExtension& extension) {
-  extension.SetExtensionInformation("BuiltinAudio",
-                                    _("Audio"),
-                                    _("Builtin audio extension"),
-                                    "Florian Rival",
-                                    "Open source (MIT License)");
+  extension
+      .SetExtensionInformation("BuiltinAudio",
+                               _("Audio"),
+                               _("Builtin audio extension"),
+                               "Florian Rival",
+                               "Open source (MIT License)")
+      .SetExtensionHelpPath("/all-features/audio");
 
 #if defined(GD_IDE_ONLY)
   extension

Core/GDCore/Extensions/Builtin/BaseObjectExtension.cpp

@@ -12,11 +12,13 @@ namespace gd {
 
 void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
     gd::PlatformExtension& extension) {
-  extension.SetExtensionInformation("BuiltinObject",
-                                    _("Base object"),
-                                    _("Base object"),
-                                    "Florian Rival",
-                                    "Open source (MIT License)");
+  extension
+      .SetExtensionInformation("BuiltinObject",
+                               _("Base object"),
+                               _("Base object"),
+                               "Florian Rival",
+                               "Open source (MIT License)")
+      .SetExtensionHelpPath("/objects/base_object");
 
   gd::ObjectMetadata& obj = extension.AddObject<gd::Object>(
       "", _("Base object"), _("Base object"), "res/objeticon24.png");
@@ -34,7 +36,6 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .AddParameter("relationalOperator", _("Sign of the test"))
       .AddParameter("expression", _("X position"))
       .MarkAsSimple()
-      .SetHelpPage("gdevelop/documentation/manual/base")
       .SetManipulatedType("number");
 
   obj.AddAction("MettreX",
@@ -49,7 +50,6 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .AddParameter("operator", _("Modification's sign"))
       .AddParameter("expression", _("Value"))
       .MarkAsSimple()
-      .SetHelpPage("gdevelop/documentation/manual/base")
       .SetManipulatedType("number");
 
   obj.AddCondition("PosY",
@@ -64,7 +64,6 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .AddParameter("relationalOperator", _("Sign of the test"))
       .AddParameter("expression", _("Y position"))
       .MarkAsSimple()
-      .SetHelpPage("gdevelop/documentation/manual/base")
       .SetManipulatedType("number");
 
   obj.AddAction("MettreY",
@@ -79,7 +78,6 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .AddParameter("operator", _("Modification's sign"))
       .AddParameter("expression", _("Value"))
       .MarkAsSimple()
-      .SetHelpPage("gdevelop/documentation/manual/base")
       .SetManipulatedType("number");
 
   obj.AddAction(
@@ -96,12 +94,12 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .AddParameter("expression", _("X position"))
       .AddParameter("operator", _("Modification's sign"))
       .AddParameter("expression", _("Y position"))
-      .SetHelpPage("gdevelop/documentation/manual/base")
       .MarkAsSimple();
 
   obj.AddAction("MettreAutourPos",
                 _("Put an object around a position"),
-                _("Position an object around a position, with specified angle "
+                _("Position the center of the given object around a position, "
+                  "using the specified angle "
                   "and distance."),
                 _("Put _PARAM0_ around _PARAM1_;_PARAM2_, with an angle of "
                   "_PARAM4_ degrees and _PARAM3_ pixels distance."),
@@ -114,7 +112,6 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .AddParameter("expression", _("Y position"))
       .AddParameter("expression", _("Distance"))
       .AddParameter("expression", _("Angle, in degrees"))
-      .SetHelpPage("gdevelop/documentation/manual/base")
       .MarkAsAdvanced();
 
   obj.AddAction("SetAngle",
@@ -128,7 +125,6 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .AddParameter("object", _("Object"))
       .AddParameter("operator", _("Modification's sign"))
       .AddParameter("expression", _("Value"))
-      .SetHelpPage("gdevelop/documentation/manual/base")
       .SetManipulatedType("number");
 
   obj.AddAction("Rotate",
@@ -143,7 +139,6 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .AddParameter("object", _("Object"))
       .AddParameter("expression", _("Angular speed (in degrees per second)"))
       .AddCodeOnlyParameter("currentScene", "")
-      .SetHelpPage("gdevelop/documentation/manual/base")
       .MarkAsSimple();
 
   obj.AddAction(
@@ -160,7 +155,6 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .AddParameter(
           "expression",
           _("Angular speed (in degrees per second) (0 for immediate rotation)"))
-      .SetHelpPage("gdevelop/documentation/manual/base")
       .AddCodeOnlyParameter("currentScene", "");
 
   obj.AddAction(
@@ -180,7 +174,6 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
           "expression",
           _("Angular speed (in degrees per second) (0 for immediate rotation)"))
       .AddCodeOnlyParameter("currentScene", "")
-      .SetHelpPage("gdevelop/documentation/manual/base")
       .MarkAsAdvanced();
 
   obj.AddAction("AddForceXY",
@@ -196,8 +189,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .AddParameter("object", _("Object"))
       .AddParameter("expression", _("Speed on X axis (in pixels per second)"))
       .AddParameter("expression", _("Speed on Y axis (in pixels per second)"))
-      .AddParameter("expression", _("Damping (Default: 0)"))
-      .SetHelpPage("gdevelop/documentation/manual/base");
+      .AddParameter("expression", _("Damping (Default: 0)"));
 
   obj.AddAction("AddForceAL",
                 _("Add a force (angle)"),
@@ -214,7 +206,6 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .AddParameter("expression", _("Angle"))
       .AddParameter("expression", _("Speed (in pixels per second)"))
       .AddParameter("expression", _("Damping (Default: 0)"))
-      .SetHelpPage("gdevelop/documentation/manual/base")
       .MarkAsAdvanced();
 
   obj.AddAction(
@@ -232,7 +223,6 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .AddParameter("expression", _("Y position"))
       .AddParameter("expression", _("Speed (in pixels per second)"))
       .AddParameter("expression", _("Damping (Default: 0)"))
-      .SetHelpPage("gdevelop/documentation/manual/base#displacement")
       .MarkAsAdvanced();
 
   obj.AddAction(
@@ -265,7 +255,6 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                 "res/actions/arreter.png")
 
       .AddParameter("object", _("Object"))
-      .SetHelpPage("gdevelop/documentation/manual/base#displacement")
       .MarkAsAdvanced();
 
   obj.AddAction("Delete",
@@ -599,7 +588,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
   obj.AddAction("MettreAutour",
                 _("Put an object around another"),
                 _("Position an object around another, with the specified angle "
-                  "and distance."),
+                  "and distance. The center of the objects are used for "
+                  "positioning them."),
                 _("Put _PARAM0_ around _PARAM1_, with an angle of _PARAM3_ "
                   "degrees and _PARAM2_ pixels distance."),
                 _("Position"),
@@ -1026,6 +1016,34 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .AddCodeOnlyParameter("conditionInverted", "")
       .MarkAsAdvanced();
 
+  extension
+      .AddCondition(
+          "RaycastToPosition",
+          _("Raycast to position"),
+          _("Sends a ray from the given source position to the final point, "
+            "intersecting the closest object.\nThe instersected "
+            "object will become the only one taken into account.\nIf "
+            "the condition is inverted, the object to be intersected "
+            "will be the farthest one within the ray radius."),
+          _("Raycast _PARAM0_ from _PARAM1_;_PARAM2_, and save the "
+            "result in _PARAM5_, _PARAM6_"),
+          _("Collision"),
+          "res/conditions/raycast24.png",
+          "res/conditions/raycast.png")
+      .AddParameter("objectList", _("Objects to test against the ray"))
+      .AddParameter("expression", _("Ray source X position"))
+      .AddParameter("expression", _("Ray source Y position"))
+      .AddParameter("expression", _("Ray target X position"))
+      .AddParameter("expression", _("Ray target Y position"))
+      .AddParameter(
+          "scenevar",
+          _("Variable where to store the X position of the intersection"))
+      .AddParameter(
+          "scenevar",
+          _("Variable where to store the Y position of the intersection"))
+      .AddCodeOnlyParameter("conditionInverted", "")
+      .MarkAsAdvanced();
+
   extension
       .AddExpression(
           "Count",

Core/GDCore/Extensions/Builtin/CameraExtension.cpp

@@ -11,11 +11,13 @@ namespace gd {
 
 void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
     gd::PlatformExtension& extension) {
-  extension.SetExtensionInformation("BuiltinCamera",
-                                    _("Cameras and layers features"),
-                                    _("Built-in camera extension"),
-                                    "Florian Rival",
-                                    "Open source (MIT License)");
+  extension
+      .SetExtensionInformation("BuiltinCamera",
+                               _("Cameras and layers features"),
+                               _("Built-in camera extension"),
+                               "Florian Rival",
+                               "Open source (MIT License)")
+      .SetExtensionHelpPath("" /*TODO: Add a documentation page for this */);
 
 #if defined(GD_IDE_ONLY)
   extension

Core/GDCore/Extensions/Builtin/CommonConversionsExtension.cpp

@@ -12,12 +12,14 @@ namespace gd {
 void GD_CORE_API
 BuiltinExtensionsImplementer::ImplementsCommonConversionsExtension(
     gd::PlatformExtension& extension) {
-  extension.SetExtensionInformation(
-      "BuiltinCommonConversions",
-      _("Standard Conversions"),
-      _("Built-in extension providing standard conversions expressions."),
-      "Florian Rival",
-      "Open source (MIT License)");
+  extension
+      .SetExtensionInformation(
+          "BuiltinCommonConversions",
+          _("Standard Conversions"),
+          _("Built-in extension providing standard conversions expressions."),
+          "Florian Rival",
+          "Open source (MIT License)")
+      .SetExtensionHelpPath("" /*TODO: Add a documentation page for this */);
 
 #if defined(GD_IDE_ONLY)
 

Core/GDCore/Extensions/Builtin/CommonInstructionsExtension.cpp

@@ -22,12 +22,14 @@ namespace gd {
 void GD_CORE_API
 BuiltinExtensionsImplementer::ImplementsCommonInstructionsExtension(
     gd::PlatformExtension& extension) {
-  extension.SetExtensionInformation(
-      "BuiltinCommonInstructions",
-      _("Standard events"),
-      _("Built-in extension providing standard events."),
-      "Florian Rival",
-      "Open source (MIT License)");
+  extension
+      .SetExtensionInformation(
+          "BuiltinCommonInstructions",
+          _("Standard events"),
+          _("Built-in extension providing standard events."),
+          "Florian Rival",
+          "Open source (MIT License)")
+      .SetExtensionHelpPath("" /*TODO: Add a documentation page for this */);
 
 #if defined(GD_IDE_ONLY)
   extension

Core/GDCore/Extensions/Builtin/ExternalLayoutsExtension.cpp

@@ -12,13 +12,15 @@ namespace gd {
 void GD_CORE_API
 BuiltinExtensionsImplementer::ImplementsExternalLayoutsExtension(
     gd::PlatformExtension& extension) {
-  extension.SetExtensionInformation(
-      "BuiltinExternalLayouts",
-      _("External layouts"),
-      _("Built-in extension providing actions and conditions related to "
-        "external layouts"),
-      "Florian Rival",
-      "Open source (MIT License)");
+  extension
+      .SetExtensionInformation(
+          "BuiltinExternalLayouts",
+          _("External layouts"),
+          _("Built-in extension providing actions and conditions related to "
+            "external layouts"),
+          "Florian Rival",
+          "Open source (MIT License)")
+      .SetExtensionHelpPath("" /*TODO: Add a documentation page for this */);
 
 #if defined(GD_IDE_ONLY)
   extension

Core/GDCore/Extensions/Builtin/FileExtension.cpp

@@ -11,12 +11,14 @@ namespace gd {
 
 void GD_CORE_API BuiltinExtensionsImplementer::ImplementsFileExtension(
     gd::PlatformExtension& extension) {
-  extension.SetExtensionInformation("BuiltinFile",
-                                    _("Storage and files"),
-                                    _("Built-in extension providing functions "
-                                      "to store data and manipulate files."),
-                                    "Florian Rival",
-                                    "Open source (MIT License)");
+  extension
+      .SetExtensionInformation("BuiltinFile",
+                               _("Storage and files"),
+                               _("Built-in extension providing functions "
+                                 "to store data and manipulate files."),
+                               "Florian Rival",
+                               "Open source (MIT License)")
+      .SetExtensionHelpPath("/all-features/storage");
 
 #if defined(GD_IDE_ONLY)
   extension

Core/GDCore/Extensions/Builtin/JoystickExtension.cpp

@@ -11,12 +11,14 @@ namespace gd {
 
 void GD_CORE_API BuiltinExtensionsImplementer::ImplementsJoystickExtension(
     gd::PlatformExtension& extension) {
-  extension.SetExtensionInformation(
-      "BuiltinJoystick",
-      _("Joysticks features"),
-      _("Built-in extension that enables the use of joysticks"),
-      "Florian Rival",
-      "Open source (MIT License)");
+  extension
+      .SetExtensionInformation(
+          "BuiltinJoystick",
+          _("Joysticks features"),
+          _("Built-in extension that enables the use of joysticks"),
+          "Florian Rival",
+          "Open source (MIT License)")
+      .SetExtensionHelpPath("" /*TODO: Add a documentation page for this */);
 
 #if defined(GD_IDE_ONLY)
   extension

Core/GDCore/Extensions/Builtin/KeyboardExtension.cpp

@@ -11,12 +11,14 @@ namespace gd {
 
 void GD_CORE_API BuiltinExtensionsImplementer::ImplementsKeyboardExtension(
     gd::PlatformExtension& extension) {
-  extension.SetExtensionInformation(
-      "BuiltinKeyboard",
-      _("Keyboard features"),
-      _("Built-in extension that enables the use of a keyboard"),
-      "Florian Rival",
-      "Open source (MIT License)");
+  extension
+      .SetExtensionInformation(
+          "BuiltinKeyboard",
+          _("Keyboard features"),
+          _("Built-in extension that enables the use of a keyboard"),
+          "Florian Rival",
+          "Open source (MIT License)")
+      .SetExtensionHelpPath("" /*TODO: Add a documentation page for this */);
 
 #if defined(GD_IDE_ONLY)
   extension

Core/GDCore/Extensions/Builtin/MouseExtension.cpp

@@ -11,12 +11,14 @@ namespace gd {
 
 void GD_CORE_API BuiltinExtensionsImplementer::ImplementsMouseExtension(
     gd::PlatformExtension& extension) {
-  extension.SetExtensionInformation(
-      "BuiltinMouse",
-      _("Mouse features"),
-      _("Built-in extension that enables the use of a mouse"),
-      "Florian Rival",
-      "Open source (MIT License)");
+  extension
+      .SetExtensionInformation(
+          "BuiltinMouse",
+          _("Mouse features"),
+          _("Built-in extension that enables the use of a mouse"),
+          "Florian Rival",
+          "Open source (MIT License)")
+      .SetExtensionHelpPath("/events/mouse-touch");
 
 #if defined(GD_IDE_ONLY)
   extension

Core/GDCore/Extensions/Builtin/NetworkExtension.cpp

@@ -11,12 +11,14 @@ namespace gd {
 
 void GD_CORE_API BuiltinExtensionsImplementer::ImplementsNetworkExtension(
     gd::PlatformExtension& extension) {
-  extension.SetExtensionInformation(
-      "BuiltinNetwork",
-      _("Basic internet features"),
-      _("Built-in extension providing network features."),
-      "Florian Rival",
-      "Open source (MIT License)");
+  extension
+      .SetExtensionInformation(
+          "BuiltinNetwork",
+          _("Basic internet features"),
+          _("Built-in extension providing network features."),
+          "Florian Rival",
+          "Open source (MIT License)")
+      .SetExtensionHelpPath("/all-features/network");
 
 #if defined(GD_IDE_ONLY)
   extension

Core/GDCore/Extensions/Builtin/SceneExtension.cpp

@@ -11,23 +11,61 @@ namespace gd {
 
 void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSceneExtension(
     gd::PlatformExtension& extension) {
-  extension.SetExtensionInformation(
-      "BuiltinScene",
-      _("Scene management features"),
-      _("This Built-in extension allows you to manipulate scenes"),
-      "Florian Rival",
-      "Open source (MIT License)");
+  extension
+      .SetExtensionInformation(
+          "BuiltinScene",
+          _("Scene management features"),
+          _("Built-in extension allowing to manipulate scenes and providing common features"),
+          "Florian Rival",
+          "Open source (MIT License)")
+      .SetExtensionHelpPath("" /*TODO: Add a documentation page for this */);
 
 #if defined(GD_IDE_ONLY)
 
   extension
       .AddExpression("Random",
-                     _("Random value"),
-                     _("Random value"),
+                     _("Random integer"),
+                     _("Random integer"),
                      _("Random"),
                      "res/actions/position.png")
       .AddParameter("expression", _("Maximum value"));
 
+  extension
+      .AddExpression("RandomInRange",
+                     _("Random integer in range"),
+                     _("Random integer in range"),
+                     _("Random"),
+                     "res/actions/position.png")
+      .AddParameter("expression", _("Minimum value"))
+      .AddParameter("expression", _("Maximum value"));
+
+  extension
+      .AddExpression("RandomFloat",
+                     _("Random float"),
+                     _("Random float"),
+                     _("Random"),
+                     "res/actions/position.png")
+      .AddParameter("expression", _("Maximum value"));
+
+  extension
+      .AddExpression("RandomFloatInRange",
+                     _("Random float in range"),
+                     _("Random float in range"),
+                     _("Random"),
+                     "res/actions/position.png")
+      .AddParameter("expression", _("Minimum value"))
+      .AddParameter("expression", _("Maximum value"));
+
+  extension
+      .AddExpression("RandomWithStep",
+                     _("Random value in steps"),
+                     _("Random value in steps"),
+                     _("Random"),
+                     "res/actions/position.png")
+      .AddParameter("expression", _("Minimum value"))
+      .AddParameter("expression", _("Maximum value"))
+      .AddParameter("expression", _("Step"));
+
   extension
       .AddStrExpression("CurrentSceneName",
                         _("Current scene name"),

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

@@ -14,13 +14,13 @@ namespace gd {
 
 void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
     gd::PlatformExtension& extension) {
-  extension.SetExtensionInformation(
-      "Sprite",
-      _("Sprite"),
-      _("Extension for adding animated objects in the scene, which can contain "
-        "animations with directions within each."),
-      "Florian Rival",
-      "Open source (MIT License)");
+  extension
+      .SetExtensionInformation("Sprite",
+                               _("Sprite"),
+                               _("Sprite are animated object which can be used for most elements of a game."),
+                               "Florian Rival",
+                               "Open source (MIT License)")
+      .SetExtensionHelpPath("/objects/sprite");
 
   gd::ObjectMetadata& obj = extension.AddObject<SpriteObject>(
       "Sprite",

Core/GDCore/Extensions/Builtin/StringInstructionsExtension.cpp

@@ -12,13 +12,15 @@ namespace gd {
 void GD_CORE_API
 BuiltinExtensionsImplementer::ImplementsStringInstructionsExtension(
     gd::PlatformExtension& extension) {
-  extension.SetExtensionInformation(
-      "BuiltinStringInstructions",
-      _("Text manipulation"),
-      _("Built-in extension providing expressions for manipulating text "
-        "objects."),
-      "Florian Rival",
-      "Open source (MIT License)");
+  extension
+      .SetExtensionInformation(
+          "BuiltinStringInstructions",
+          _("Text manipulation"),
+          _("Built-in extension providing expressions for manipulating text "
+            "objects."),
+          "Florian Rival",
+          "Open source (MIT License)")
+      .SetExtensionHelpPath("" /*TODO: Add a documentation page for this */);
 
 #if defined(GD_IDE_ONLY)
   extension.AddStrExpression("NewLine",

Core/GDCore/Extensions/Builtin/TimeExtension.cpp

@@ -11,12 +11,14 @@ namespace gd {
 
 void GD_CORE_API BuiltinExtensionsImplementer::ImplementsTimeExtension(
     gd::PlatformExtension& extension) {
-  extension.SetExtensionInformation(
-      "BuiltinTime",
-      _("Time"),
-      _("Built-in extension providing actions and conditions related to time."),
-      "Florian Rival",
-      "Open source (MIT License)");
+  extension
+      .SetExtensionInformation("BuiltinTime",
+                               _("Time"),
+                               _("Built-in extension providing actions and "
+                                 "conditions related to time."),
+                               "Florian Rival",
+                               "Open source (MIT License)")
+      .SetExtensionHelpPath("/all-features/timers");
 
 #if defined(GD_IDE_ONLY)
 

Core/GDCore/Extensions/Builtin/VariablesExtension.cpp

@@ -11,12 +11,14 @@ namespace gd {
 
 void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
     gd::PlatformExtension& extension) {
-  extension.SetExtensionInformation(
-      "BuiltinVariables",
-      _("Variable features"),
-      _("This Built-in extension allows the manipulation of variables"),
-      "Florian Rival",
-      "Open source (MIT License)");
+  extension
+      .SetExtensionInformation(
+          "BuiltinVariables",
+          _("Variable features"),
+          _("Built-in extension allowing to manipulate variables"),
+          "Florian Rival",
+          "Open source (MIT License)")
+      .SetExtensionHelpPath("/all-features/variables");
 
 #if defined(GD_IDE_ONLY)
   extension

Core/GDCore/Extensions/Builtin/WindowExtension.cpp

@@ -11,12 +11,14 @@ namespace gd {
 
 void GD_CORE_API BuiltinExtensionsImplementer::ImplementsWindowExtension(
     gd::PlatformExtension& extension) {
-  extension.SetExtensionInformation("BuiltinWindow",
-                                    _("Window features"),
-                                    _("This Built-in extension enables the "
-                                      "manipulation of the game's window"),
-                                    "Florian Rival",
-                                    "Open source (MIT License)");
+  extension
+      .SetExtensionInformation("BuiltinWindow",
+                               _("Window features"),
+                               _("Built-in extension allowing to manipulate "
+                                 "the game window and canvas"),
+                               "Florian Rival",
+                               "Open source (MIT License)")
+      .SetExtensionHelpPath("" /*TODO: Add a documentation page for this */);
 
 #if defined(GD_IDE_ONLY)
   extension

Core/GDCore/Extensions/Metadata/BehaviorMetadata.cpp

@@ -75,7 +75,8 @@ gd::InstructionMetadata& BehaviorMetadata::AddCondition(
                                                            sentence,
                                                            group,
                                                            icon,
-                                                           smallicon);
+                                                           smallicon)
+                                           .SetHelpPath(GetHelpPath());
   return conditionsInfos[nameWithNamespace];
 #endif
 }
@@ -98,7 +99,8 @@ gd::InstructionMetadata& BehaviorMetadata::AddAction(
                                                         sentence,
                                                         group,
                                                         icon,
-                                                        smallicon);
+                                                        smallicon)
+                                        .SetHelpPath(GetHelpPath());
   return actionsInfos[nameWithNamespace];
 #endif
 }

Core/GDCore/Extensions/Metadata/BehaviorMetadata.h

@@ -14,16 +14,10 @@
 #endif
 namespace gd {
 class Behavior;
-}
-namespace gd {
 class BehaviorsSharedData;
-}
-namespace gd {
 class InstructionMetadata;
-}
-namespace gd {
 class ExpressionMetadata;
-}
+}  // namespace gd
 class wxBitmap;
 
 namespace gd {
@@ -110,6 +104,22 @@ class GD_CORE_API BehaviorMetadata {
    */
   BehaviorMetadata& AddIncludeFile(const gd::String& includeFile);
 
+  /**
+   * Get the help path of the behavior, relative to the documentation root.
+   */
+  const gd::String &GetHelpPath() const { return helpPath; }
+
+  /**
+   * Set the help path of the behavior, relative to the documentation root.
+   * 
+   * The behavior instructions will have this help path set by
+   * default, unless you call SetHelpPath on them.
+   */
+  BehaviorMetadata &SetHelpPath(const gd::String &path) {
+    helpPath = path;
+    return *this;
+  }
+
 #if defined(GD_IDE_ONLY)
   const gd::String& GetFullName() const { return fullname; }
   const gd::String& GetDefaultName() const { return defaultName; }
@@ -136,6 +146,7 @@ class GD_CORE_API BehaviorMetadata {
 #endif
  private:
   gd::String extensionNamespace;
+  gd::String helpPath;
 #if defined(GD_IDE_ONLY)
   gd::String fullname;
   gd::String defaultName;

Core/GDCore/Extensions/Metadata/ExpressionMetadata.h

@@ -181,6 +181,14 @@ class GD_CORE_API ExpressionMetadata {
     return codeExtraInformation.SetFunctionName(functionName);
   }
 
+  /**
+   * \brief Return the structure containing the information about code
+   * generation for the expression.
+   */
+  ExpressionCodeGenerationInformation& GetCodeExtraInformation() {
+    return codeExtraInformation;
+  };
+
   ExpressionCodeGenerationInformation codeExtraInformation;
 
   /** Don't use this constructor. Only here to fullfil std::map requirements

Core/GDCore/Extensions/Metadata/InstructionMetadata.cpp

@@ -28,7 +28,7 @@ InstructionMetadata::InstructionMetadata(const gd::String& extensionNamespace_,
                                          const gd::String& smallIcon_)
     : fullname(fullname_),
       description(description_),
-      helpPage(),
+      helpPath(""),
       sentence(sentence_),
       group(group_),
       iconFilename(icon_),

Core/GDCore/Extensions/Metadata/InstructionMetadata.h

@@ -19,16 +19,10 @@
 class wxBitmap;
 namespace gd {
 class Project;
-}
-namespace gd {
 class Layout;
-}
-namespace gd {
 class EventsCodeGenerator;
-}
-namespace gd {
 class EventsCodeGenerationContext;
-}
+}  // namespace gd
 
 namespace gd {
 
@@ -91,9 +85,26 @@ class GD_CORE_API ParameterMetadata {
    * \brief Return true if the type of the parameter is "object", "objectPtr" or
    * "objectList". \see gd::ParameterMetadata::GetType
    */
-  static bool IsObject(const gd::String &type) {
-    return type == "object" || type == "objectPtr" || type == "objectList" ||
-           type == "objectListWithoutPicking";
+  static bool IsObject(const gd::String &parameterType) {
+    return parameterType == "object" || parameterType == "objectPtr" ||
+           parameterType == "objectList" ||
+           parameterType == "objectListWithoutPicking";
+  }
+
+  /**
+   * \brief Return true if the type of the parameter is "object", "objectPtr" or
+   * "objectList". \see gd::ParameterMetadata::GetType
+   */
+  static bool IsExpression(const gd::String &type,
+                           const gd::String &parameterType) {
+    if (type == "number") {
+      return parameterType == "expression" || parameterType == "camera";
+    } else if (type == "string") {
+      return parameterType == "string" || parameterType == "layer" ||
+             parameterType == "color" || parameterType == "file" ||
+             parameterType == "joyaxis";
+    }
+    return false;
   }
 };
 
@@ -132,15 +143,15 @@ class GD_CORE_API InstructionMetadata {
   bool CanHaveSubInstructions() const { return canHaveSubInstructions; }
 
   /**
-   * Get the help page of the instruction.
+   * Get the help path of the instruction, relative to the documentation root.
    */
-  const gd::String &GetHelpPage() const { return helpPage; }
+  const gd::String &GetHelpPath() const { return helpPath; }
 
   /**
-   * Set the help page of the instruction.
+   * Set the help path of the instruction, relative to the documentation root.
    */
-  InstructionMetadata &SetHelpPage(const gd::String &page) {
-    helpPage = page;
+  InstructionMetadata &SetHelpPath(const gd::String &path) {
+    helpPath = path;
     return *this;
   }
 
@@ -374,6 +385,12 @@ class GD_CORE_API InstructionMetadata {
   ExtraInformation codeExtraInformation;  ///< Information about how generate
                                           ///< code for the instruction
 
+  /**
+   * \brief Return the structure containing the information about code
+   * generation for the instruction.
+   */
+  ExtraInformation &GetCodeExtraInformation() { return codeExtraInformation; }
+
   /**
    * \brief Declare if the instruction being declared is somewhat manipulating
    * in a standard way. \param type "number" or "string" \note Shortcut for
@@ -404,7 +421,7 @@ class GD_CORE_API InstructionMetadata {
  private:
   gd::String fullname;
   gd::String description;
-  gd::String helpPage;
+  gd::String helpPath;
   gd::String sentence;
   gd::String group;
 #if !defined(GD_NO_WX_GUI)

Core/GDCore/Extensions/Metadata/MetadataProvider.cpp

@@ -21,252 +21,314 @@ gd::ObjectMetadata MetadataProvider::badObjectInfo;
 gd::InstructionMetadata MetadataProvider::badInstructionMetadata;
 gd::ExpressionMetadata MetadataProvider::badExpressionMetadata;
 gd::ExpressionMetadata MetadataProvider::badStrExpressionMetadata;
+gd::PlatformExtension MetadataProvider::badExtension;
 
-/**
- * Get the metadata about a behavior in a platform
- */
-const BehaviorMetadata& MetadataProvider::GetBehaviorMetadata(
-    const gd::Platform& platform, gd::String behaviorType) {
-  for (std::size_t i = 0; i < platform.GetAllPlatformExtensions().size(); ++i) {
-    std::vector<gd::String> autosTypes =
-        platform.GetAllPlatformExtensions()[i]->GetBehaviorsTypes();
-    for (std::size_t j = 0; j < autosTypes.size(); ++j) {
-      if (autosTypes[j] == behaviorType)
-        return platform.GetAllPlatformExtensions()[i]->GetBehaviorMetadata(
-            behaviorType);
+ExtensionAndMetadata<BehaviorMetadata>
+MetadataProvider::GetExtensionAndBehaviorMetadata(const gd::Platform& platform,
+                                                  gd::String behaviorType) {
+  for (auto& extension : platform.GetAllPlatformExtensions()) {
+    auto behaviorTypes = extension->GetBehaviorsTypes();
+    for (std::size_t j = 0; j < behaviorTypes.size(); ++j) {
+      if (behaviorTypes[j] == behaviorType)
+        return ExtensionAndMetadata<BehaviorMetadata>(
+            *extension, extension->GetBehaviorMetadata(behaviorType));
     }
   }
 
-  return badBehaviorInfo;
+  return ExtensionAndMetadata<BehaviorMetadata>(badExtension, badBehaviorInfo);
 }
 
-/**
- * Get the metadata about an object in a platform
- */
-const ObjectMetadata& MetadataProvider::GetObjectMetadata(
-    const gd::Platform& platform, gd::String objectType) {
-  for (std::size_t i = 0; i < platform.GetAllPlatformExtensions().size(); ++i) {
-    std::vector<gd::String> objectsTypes =
-        platform.GetAllPlatformExtensions()[i]->GetExtensionObjectsTypes();
+const BehaviorMetadata& MetadataProvider::GetBehaviorMetadata(
+    const gd::Platform& platform, gd::String behaviorType) {
+  return GetExtensionAndBehaviorMetadata(platform, behaviorType).GetMetadata();
+}
+
+ExtensionAndMetadata<ObjectMetadata>
+MetadataProvider::GetExtensionAndObjectMetadata(const gd::Platform& platform,
+                                                gd::String objectType) {
+  for (auto& extension : platform.GetAllPlatformExtensions()) {
+    auto objectsTypes = extension->GetExtensionObjectsTypes();
     for (std::size_t j = 0; j < objectsTypes.size(); ++j) {
       if (objectsTypes[j] == objectType)
-        return platform.GetAllPlatformExtensions()[i]->GetObjectMetadata(
-            objectType);
+        return ExtensionAndMetadata<ObjectMetadata>(
+            *extension, extension->GetObjectMetadata(objectType));
     }
   }
 
-  return badObjectInfo;
+  return ExtensionAndMetadata<ObjectMetadata>(badExtension, badObjectInfo);
+}
+
+const ObjectMetadata& MetadataProvider::GetObjectMetadata(
+    const gd::Platform& platform, gd::String objectType) {
+  return GetExtensionAndObjectMetadata(platform, objectType).GetMetadata();
+}
+
+ExtensionAndMetadata<InstructionMetadata>
+MetadataProvider::GetExtensionAndActionMetadata(const gd::Platform& platform,
+                                                gd::String actionType) {
+  auto& extensions = platform.GetAllPlatformExtensions();
+  for (auto& extension : extensions) {
+    const auto& allActions = extension->GetAllActions();
+    if (allActions.find(actionType) != allActions.end())
+      return ExtensionAndMetadata<InstructionMetadata>(
+          *extension, allActions.find(actionType)->second);
+
+    const auto& objects = extension->GetExtensionObjectsTypes();
+    for (const gd::String& extObjectType : objects) {
+      const auto& allObjectsActions =
+          extension->GetAllActionsForObject(extObjectType);
+      if (allObjectsActions.find(actionType) != allObjectsActions.end())
+        return ExtensionAndMetadata<InstructionMetadata>(
+            *extension, allObjectsActions.find(actionType)->second);
+    }
+
+    const auto& autos = extension->GetBehaviorsTypes();
+    for (std::size_t j = 0; j < autos.size(); ++j) {
+      const auto& allAutosActions =
+          extension->GetAllActionsForBehavior(autos[j]);
+      if (allAutosActions.find(actionType) != allAutosActions.end())
+        return ExtensionAndMetadata<InstructionMetadata>(
+            *extension, allAutosActions.find(actionType)->second);
+    }
+  }
+
+  return ExtensionAndMetadata<InstructionMetadata>(badExtension,
+                                                   badInstructionMetadata);
 }
 
 const gd::InstructionMetadata& MetadataProvider::GetActionMetadata(
     const gd::Platform& platform, gd::String actionType) {
-  std::vector<std::shared_ptr<PlatformExtension> > extensions =
-      platform.GetAllPlatformExtensions();
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const std::map<gd::String, gd::InstructionMetadata>& allActions =
-        extensions[i]->GetAllActions();
-    if (allActions.find(actionType) != allActions.end())
-      return allActions.find(actionType)->second;
+  return GetExtensionAndActionMetadata(platform, actionType).GetMetadata();
+}
 
-    const vector<gd::String>& objects =
-        extensions[i]->GetExtensionObjectsTypes();
-    for (std::size_t j = 0; j < objects.size(); ++j) {
-      const std::map<gd::String, gd::InstructionMetadata>& allObjectsActions =
-          extensions[i]->GetAllActionsForObject(objects[j]);
-      if (allObjectsActions.find(actionType) != allObjectsActions.end())
-        return allObjectsActions.find(actionType)->second;
+ExtensionAndMetadata<InstructionMetadata>
+MetadataProvider::GetExtensionAndConditionMetadata(const gd::Platform& platform,
+                                                   gd::String conditionType) {
+  auto& extensions = platform.GetAllPlatformExtensions();
+  for (auto& extension : extensions) {
+    const auto& allConditions = extension->GetAllConditions();
+    if (allConditions.find(conditionType) != allConditions.end())
+      return ExtensionAndMetadata<InstructionMetadata>(
+          *extension, allConditions.find(conditionType)->second);
+
+    const auto& objects = extension->GetExtensionObjectsTypes();
+    for (const gd::String& extObjectType : objects) {
+      const auto& allObjetsConditions =
+          extension->GetAllConditionsForObject(extObjectType);
+      if (allObjetsConditions.find(conditionType) != allObjetsConditions.end())
+        return ExtensionAndMetadata<InstructionMetadata>(
+            *extension, allObjetsConditions.find(conditionType)->second);
     }
 
-    const vector<gd::String>& autos = extensions[i]->GetBehaviorsTypes();
+    const auto& autos = extension->GetBehaviorsTypes();
     for (std::size_t j = 0; j < autos.size(); ++j) {
-      const std::map<gd::String, gd::InstructionMetadata>& allAutosActions =
-          extensions[i]->GetAllActionsForBehavior(autos[j]);
-      if (allAutosActions.find(actionType) != allAutosActions.end())
-        return allAutosActions.find(actionType)->second;
+      const auto& allAutosConditions =
+          extension->GetAllConditionsForBehavior(autos[j]);
+      if (allAutosConditions.find(conditionType) != allAutosConditions.end())
+        return ExtensionAndMetadata<InstructionMetadata>(
+            *extension, allAutosConditions.find(conditionType)->second);
     }
   }
 
-  return badInstructionMetadata;
+  return ExtensionAndMetadata<InstructionMetadata>(badExtension,
+                                                   badInstructionMetadata);
 }
 
 const gd::InstructionMetadata& MetadataProvider::GetConditionMetadata(
     const gd::Platform& platform, gd::String conditionType) {
-  std::vector<std::shared_ptr<PlatformExtension> > extensions =
-      platform.GetAllPlatformExtensions();
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const std::map<gd::String, gd::InstructionMetadata>& allConditions =
-        extensions[i]->GetAllConditions();
-    if (allConditions.find(conditionType) != allConditions.end())
-      return allConditions.find(conditionType)->second;
+  return GetExtensionAndConditionMetadata(platform, conditionType)
+      .GetMetadata();
+}
 
-    const vector<gd::String>& objects =
-        extensions[i]->GetExtensionObjectsTypes();
-    for (std::size_t j = 0; j < objects.size(); ++j) {
-      const std::map<gd::String, gd::InstructionMetadata>& allObjetsConditions =
-          extensions[i]->GetAllConditionsForObject(objects[j]);
-      if (allObjetsConditions.find(conditionType) != allObjetsConditions.end())
-        return allObjetsConditions.find(conditionType)->second;
-    }
-
-    const vector<gd::String>& autos = extensions[i]->GetBehaviorsTypes();
-    for (std::size_t j = 0; j < autos.size(); ++j) {
-      const std::map<gd::String, gd::InstructionMetadata>& allAutosConditions =
-          extensions[i]->GetAllConditionsForBehavior(autos[j]);
-      if (allAutosConditions.find(conditionType) != allAutosConditions.end())
-        return allAutosConditions.find(conditionType)->second;
+ExtensionAndMetadata<ExpressionMetadata>
+MetadataProvider::GetExtensionAndObjectExpressionMetadata(
+    const gd::Platform& platform, gd::String objectType, gd::String exprType) {
+  auto& extensions = platform.GetAllPlatformExtensions();
+  for (auto& extension : extensions) {
+    const auto& objects = extension->GetExtensionObjectsTypes();
+    if (find(objects.begin(), objects.end(), objectType) != objects.end()) {
+      const auto& allObjectExpressions =
+          extension->GetAllExpressionsForObject(objectType);
+      if (allObjectExpressions.find(exprType) != allObjectExpressions.end())
+        return ExtensionAndMetadata<ExpressionMetadata>(
+            *extension, allObjectExpressions.find(exprType)->second);
     }
   }
 
-  return badInstructionMetadata;
+  // Then check base
+  for (auto& extension : extensions) {
+    const auto& allObjectExpressions =
+        extension->GetAllExpressionsForObject("");
+    if (allObjectExpressions.find(exprType) != allObjectExpressions.end())
+      return ExtensionAndMetadata<ExpressionMetadata>(
+          *extension, allObjectExpressions.find(exprType)->second);
+  }
+
+  return ExtensionAndMetadata<ExpressionMetadata>(badExtension,
+                                                  badExpressionMetadata);
 }
 
 const gd::ExpressionMetadata& MetadataProvider::GetObjectExpressionMetadata(
     const gd::Platform& platform, gd::String objectType, gd::String exprType) {
-  std::vector<std::shared_ptr<PlatformExtension> > extensions =
-      platform.GetAllPlatformExtensions();
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const vector<gd::String>& objects =
-        extensions[i]->GetExtensionObjectsTypes();
-    if (find(objects.begin(), objects.end(), objectType) != objects.end()) {
-      const std::map<gd::String, gd::ExpressionMetadata>& allObjectExpressions =
-          extensions[i]->GetAllExpressionsForObject(objectType);
-      if (allObjectExpressions.find(exprType) != allObjectExpressions.end())
-        return allObjectExpressions.find(exprType)->second;
+  return GetExtensionAndObjectExpressionMetadata(platform, objectType, exprType)
+      .GetMetadata();
+}
+
+ExtensionAndMetadata<ExpressionMetadata>
+MetadataProvider::GetExtensionAndBehaviorExpressionMetadata(
+    const gd::Platform& platform, gd::String autoType, gd::String exprType) {
+  auto& extensions = platform.GetAllPlatformExtensions();
+  for (auto& extension : extensions) {
+    const auto& autos = extension->GetBehaviorsTypes();
+    if (find(autos.begin(), autos.end(), autoType) != autos.end()) {
+      const auto& allAutoExpressions =
+          extension->GetAllExpressionsForBehavior(autoType);
+      if (allAutoExpressions.find(exprType) != allAutoExpressions.end())
+        return ExtensionAndMetadata<ExpressionMetadata>(
+            *extension, allAutoExpressions.find(exprType)->second);
     }
   }
 
   // Then check base
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const std::map<gd::String, gd::ExpressionMetadata>& allObjectExpressions =
-        extensions[i]->GetAllExpressionsForObject("");
-    if (allObjectExpressions.find(exprType) != allObjectExpressions.end())
-      return allObjectExpressions.find(exprType)->second;
+  for (auto& extension : extensions) {
+    const auto& allAutoExpressions =
+        extension->GetAllExpressionsForBehavior("");
+    if (allAutoExpressions.find(exprType) != allAutoExpressions.end())
+      return ExtensionAndMetadata<ExpressionMetadata>(
+          *extension, allAutoExpressions.find(exprType)->second);
   }
 
-  return badExpressionMetadata;
+  return ExtensionAndMetadata<ExpressionMetadata>(badExtension,
+                                                  badExpressionMetadata);
 }
 
 const gd::ExpressionMetadata& MetadataProvider::GetBehaviorExpressionMetadata(
     const gd::Platform& platform, gd::String autoType, gd::String exprType) {
-  std::vector<std::shared_ptr<PlatformExtension> > extensions =
-      platform.GetAllPlatformExtensions();
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const vector<gd::String>& autos = extensions[i]->GetBehaviorsTypes();
-    if (find(autos.begin(), autos.end(), autoType) != autos.end()) {
-      const std::map<gd::String, gd::ExpressionMetadata>& allAutoExpressions =
-          extensions[i]->GetAllExpressionsForBehavior(autoType);
-      if (allAutoExpressions.find(exprType) != allAutoExpressions.end())
-        return allAutoExpressions.find(exprType)->second;
-    }
+  return GetExtensionAndBehaviorExpressionMetadata(platform, autoType, exprType)
+      .GetMetadata();
+}
+
+ExtensionAndMetadata<ExpressionMetadata>
+MetadataProvider::GetExtensionAndExpressionMetadata(
+    const gd::Platform& platform, gd::String exprType) {
+  auto& extensions = platform.GetAllPlatformExtensions();
+  for (auto& extension : extensions) {
+    const auto& allExpr = extension->GetAllExpressions();
+    if (allExpr.find(exprType) != allExpr.end())
+      return ExtensionAndMetadata<ExpressionMetadata>(
+          *extension, allExpr.find(exprType)->second);
   }
 
-  // Then check base
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const std::map<gd::String, gd::ExpressionMetadata>& allAutoExpressions =
-        extensions[i]->GetAllExpressionsForBehavior("");
-    if (allAutoExpressions.find(exprType) != allAutoExpressions.end())
-      return allAutoExpressions.find(exprType)->second;
-  }
-
-  return badExpressionMetadata;
+  return ExtensionAndMetadata<ExpressionMetadata>(badExtension,
+                                                  badExpressionMetadata);
 }
 
 const gd::ExpressionMetadata& MetadataProvider::GetExpressionMetadata(
     const gd::Platform& platform, gd::String exprType) {
-  std::vector<std::shared_ptr<PlatformExtension> > extensions =
-      platform.GetAllPlatformExtensions();
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const std::map<gd::String, gd::ExpressionMetadata>& allExpr =
-        extensions[i]->GetAllExpressions();
-    if (allExpr.find(exprType) != allExpr.end())
-      return allExpr.find(exprType)->second;
-  }
-
-  return badExpressionMetadata;
+  return GetExtensionAndExpressionMetadata(platform, exprType).GetMetadata();
 }
 
-const gd::ExpressionMetadata& MetadataProvider::GetObjectStrExpressionMetadata(
+ExtensionAndMetadata<ExpressionMetadata>
+MetadataProvider::GetExtensionAndObjectStrExpressionMetadata(
     const gd::Platform& platform, gd::String objectType, gd::String exprType) {
-  std::vector<std::shared_ptr<PlatformExtension> > extensions =
-      platform.GetAllPlatformExtensions();
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const vector<gd::String>& objects =
-        extensions[i]->GetExtensionObjectsTypes();
+  auto& extensions = platform.GetAllPlatformExtensions();
+  for (auto& extension : extensions) {
+    const auto& objects = extension->GetExtensionObjectsTypes();
     if (find(objects.begin(), objects.end(), objectType) != objects.end()) {
-      const std::map<gd::String, gd::ExpressionMetadata>&
-          allObjectStrExpressions =
-              extensions[i]->GetAllStrExpressionsForObject(objectType);
+      const auto& allObjectStrExpressions =
+          extension->GetAllStrExpressionsForObject(objectType);
       if (allObjectStrExpressions.find(exprType) !=
           allObjectStrExpressions.end())
-        return allObjectStrExpressions.find(exprType)->second;
+        return ExtensionAndMetadata<ExpressionMetadata>(
+            *extension, allObjectStrExpressions.find(exprType)->second);
     }
   }
 
   // Then check in functions of "Base object".
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const std::map<gd::String, gd::ExpressionMetadata>&
-        allObjectStrExpressions =
-            extensions[i]->GetAllStrExpressionsForObject("");
+  for (auto& extension : extensions) {
+    const auto& allObjectStrExpressions =
+        extension->GetAllStrExpressionsForObject("");
     if (allObjectStrExpressions.find(exprType) != allObjectStrExpressions.end())
-      return allObjectStrExpressions.find(exprType)->second;
+      return ExtensionAndMetadata<ExpressionMetadata>(
+          *extension, allObjectStrExpressions.find(exprType)->second);
   }
 
-  return badStrExpressionMetadata;
+  return ExtensionAndMetadata<ExpressionMetadata>(badExtension,
+                                                  badStrExpressionMetadata);
+}
+
+const gd::ExpressionMetadata& MetadataProvider::GetObjectStrExpressionMetadata(
+    const gd::Platform& platform, gd::String objectType, gd::String exprType) {
+  return GetExtensionAndObjectStrExpressionMetadata(
+             platform, objectType, exprType)
+      .GetMetadata();
+}
+
+ExtensionAndMetadata<ExpressionMetadata>
+MetadataProvider::GetExtensionAndBehaviorStrExpressionMetadata(
+    const gd::Platform& platform, gd::String autoType, gd::String exprType) {
+  auto& extensions = platform.GetAllPlatformExtensions();
+  for (auto& extension : extensions) {
+    const auto& autos = extension->GetBehaviorsTypes();
+    if (find(autos.begin(), autos.end(), autoType) != autos.end()) {
+      const auto& allBehaviorStrExpressions =
+          extension->GetAllStrExpressionsForBehavior(autoType);
+      if (allBehaviorStrExpressions.find(exprType) !=
+          allBehaviorStrExpressions.end())
+        return ExtensionAndMetadata<ExpressionMetadata>(
+            *extension, allBehaviorStrExpressions.find(exprType)->second);
+    }
+  }
+
+  // Then check in functions of "Base object".
+  for (auto& extension : extensions) {
+    const auto& allBehaviorStrExpressions =
+        extension->GetAllStrExpressionsForBehavior("");
+    if (allBehaviorStrExpressions.find(exprType) !=
+        allBehaviorStrExpressions.end())
+      return ExtensionAndMetadata<ExpressionMetadata>(
+          *extension, allBehaviorStrExpressions.find(exprType)->second);
+  }
+
+  return ExtensionAndMetadata<ExpressionMetadata>(badExtension,
+                                                  badStrExpressionMetadata);
 }
 
 const gd::ExpressionMetadata&
 MetadataProvider::GetBehaviorStrExpressionMetadata(const gd::Platform& platform,
                                                    gd::String autoType,
                                                    gd::String exprType) {
-  std::vector<std::shared_ptr<PlatformExtension> > extensions =
-      platform.GetAllPlatformExtensions();
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const vector<gd::String>& autos = extensions[i]->GetBehaviorsTypes();
-    if (find(autos.begin(), autos.end(), autoType) != autos.end()) {
-      const std::map<gd::String, gd::ExpressionMetadata>&
-          allBehaviorStrExpressions =
-              extensions[i]->GetAllStrExpressionsForBehavior(autoType);
-      if (allBehaviorStrExpressions.find(exprType) !=
-          allBehaviorStrExpressions.end())
-        return allBehaviorStrExpressions.find(exprType)->second;
-    }
+  return GetExtensionAndBehaviorStrExpressionMetadata(
+             platform, autoType, exprType)
+      .GetMetadata();
+}
+
+ExtensionAndMetadata<ExpressionMetadata>
+MetadataProvider::GetExtensionAndStrExpressionMetadata(
+    const gd::Platform& platform, gd::String exprType) {
+  auto& extensions = platform.GetAllPlatformExtensions();
+  for (auto& extension : extensions) {
+    const auto& allExpr = extension->GetAllStrExpressions();
+    if (allExpr.find(exprType) != allExpr.end())
+      return ExtensionAndMetadata<ExpressionMetadata>(
+          *extension, allExpr.find(exprType)->second);
   }
 
-  // Then check in functions of "Base object".
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const std::map<gd::String, gd::ExpressionMetadata>&
-        allBehaviorStrExpressions =
-            extensions[i]->GetAllStrExpressionsForBehavior("");
-    if (allBehaviorStrExpressions.find(exprType) !=
-        allBehaviorStrExpressions.end())
-      return allBehaviorStrExpressions.find(exprType)->second;
-  }
-
-  return badStrExpressionMetadata;
+  return ExtensionAndMetadata<ExpressionMetadata>(badExtension,
+                                                  badStrExpressionMetadata);
 }
 
 const gd::ExpressionMetadata& MetadataProvider::GetStrExpressionMetadata(
     const gd::Platform& platform, gd::String exprType) {
-  std::vector<std::shared_ptr<PlatformExtension> > extensions =
-      platform.GetAllPlatformExtensions();
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const std::map<gd::String, gd::ExpressionMetadata>& allExpr =
-        extensions[i]->GetAllStrExpressions();
-    if (allExpr.find(exprType) != allExpr.end())
-      return allExpr.find(exprType)->second;
-  }
-
-  return badStrExpressionMetadata;
+  return GetExtensionAndStrExpressionMetadata(platform, exprType).GetMetadata();
 }
 
 bool MetadataProvider::HasAction(const gd::Platform& platform,
                                  gd::String name) {
-  std::vector<std::shared_ptr<PlatformExtension> > extensions =
-      platform.GetAllPlatformExtensions();
+  auto& extensions = platform.GetAllPlatformExtensions();
 
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const std::map<gd::String, gd::InstructionMetadata>& actions =
-        extensions[i]->GetAllActions();
+  for (auto& extension : extensions) {
+    const auto& actions = extension->GetAllActions();
     if (actions.find(name) != actions.end()) return true;
   }
 
@@ -276,18 +338,15 @@ bool MetadataProvider::HasAction(const gd::Platform& platform,
 bool MetadataProvider::HasObjectAction(const gd::Platform& platform,
                                        gd::String objectType,
                                        gd::String name) {
-  std::vector<std::shared_ptr<PlatformExtension> > extensions =
-      platform.GetAllPlatformExtensions();
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const std::map<gd::String, gd::InstructionMetadata>& actions =
-        extensions[i]->GetAllActionsForObject(objectType);
+  auto& extensions = platform.GetAllPlatformExtensions();
+  for (auto& extension : extensions) {
+    const auto& actions = extension->GetAllActionsForObject(objectType);
     if (actions.find(name) != actions.end()) return true;
   }
 
   // Then check in functions of "Base object".
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const std::map<gd::String, gd::InstructionMetadata>& actions =
-        extensions[i]->GetAllActionsForObject("");
+  for (auto& extension : extensions) {
+    const auto& actions = extension->GetAllActionsForObject("");
     if (actions.find(name) != actions.end()) return true;
   }
 
@@ -297,18 +356,15 @@ bool MetadataProvider::HasObjectAction(const gd::Platform& platform,
 bool MetadataProvider::HasBehaviorAction(const gd::Platform& platform,
                                          gd::String behaviorType,
                                          gd::String name) {
-  std::vector<std::shared_ptr<PlatformExtension> > extensions =
-      platform.GetAllPlatformExtensions();
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const std::map<gd::String, gd::InstructionMetadata>& actions =
-        extensions[i]->GetAllActionsForBehavior(behaviorType);
+  auto& extensions = platform.GetAllPlatformExtensions();
+  for (auto& extension : extensions) {
+    const auto& actions = extension->GetAllActionsForBehavior(behaviorType);
     if (actions.find(name) != actions.end()) return true;
   }
 
   // Then check in functions of "Base object".
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const std::map<gd::String, gd::InstructionMetadata>& actions =
-        extensions[i]->GetAllActionsForBehavior("");
+  for (auto& extension : extensions) {
+    const auto& actions = extension->GetAllActionsForBehavior("");
     if (actions.find(name) != actions.end()) return true;
   }
 
@@ -317,11 +373,9 @@ bool MetadataProvider::HasBehaviorAction(const gd::Platform& platform,
 
 bool MetadataProvider::HasCondition(const gd::Platform& platform,
                                     gd::String name) {
-  std::vector<std::shared_ptr<PlatformExtension> > extensions =
-      platform.GetAllPlatformExtensions();
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const std::map<gd::String, gd::InstructionMetadata>& conditions =
-        extensions[i]->GetAllConditions();
+  auto& extensions = platform.GetAllPlatformExtensions();
+  for (auto& extension : extensions) {
+    const auto& conditions = extension->GetAllConditions();
     if (conditions.find(name) != conditions.end()) return true;
   }
 
@@ -331,18 +385,15 @@ bool MetadataProvider::HasCondition(const gd::Platform& platform,
 bool MetadataProvider::HasObjectCondition(const gd::Platform& platform,
                                           gd::String objectType,
                                           gd::String name) {
-  std::vector<std::shared_ptr<PlatformExtension> > extensions =
-      platform.GetAllPlatformExtensions();
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const std::map<gd::String, gd::InstructionMetadata>& conditions =
-        extensions[i]->GetAllConditionsForObject(objectType);
+  auto& extensions = platform.GetAllPlatformExtensions();
+  for (auto& extension : extensions) {
+    const auto& conditions = extension->GetAllConditionsForObject(objectType);
     if (conditions.find(name) != conditions.end()) return true;
   }
 
   // Then check in functions of "Base object".
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const std::map<gd::String, gd::InstructionMetadata>& conditions =
-        extensions[i]->GetAllConditionsForObject("");
+  for (auto& extension : extensions) {
+    const auto& conditions = extension->GetAllConditionsForObject("");
     if (conditions.find(name) != conditions.end()) return true;
   }
 
@@ -352,18 +403,16 @@ bool MetadataProvider::HasObjectCondition(const gd::Platform& platform,
 bool MetadataProvider::HasBehaviorCondition(const gd::Platform& platform,
                                             gd::String behaviorType,
                                             gd::String name) {
-  std::vector<std::shared_ptr<PlatformExtension> > extensions =
-      platform.GetAllPlatformExtensions();
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const std::map<gd::String, gd::InstructionMetadata>& conditions =
-        extensions[i]->GetAllConditionsForBehavior(behaviorType);
+  auto& extensions = platform.GetAllPlatformExtensions();
+  for (auto& extension : extensions) {
+    const auto& conditions =
+        extension->GetAllConditionsForBehavior(behaviorType);
     if (conditions.find(name) != conditions.end()) return true;
   }
 
   // Then check in functions of "Base object".
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const std::map<gd::String, gd::InstructionMetadata>& conditions =
-        extensions[i]->GetAllConditionsForBehavior("");
+  for (auto& extension : extensions) {
+    const auto& conditions = extension->GetAllConditionsForBehavior("");
     if (conditions.find(name) != conditions.end()) return true;
   }
 
@@ -372,11 +421,9 @@ bool MetadataProvider::HasBehaviorCondition(const gd::Platform& platform,
 
 bool MetadataProvider::HasExpression(const gd::Platform& platform,
                                      gd::String name) {
-  std::vector<std::shared_ptr<PlatformExtension> > extensions =
-      platform.GetAllPlatformExtensions();
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const std::map<gd::String, gd::ExpressionMetadata>& expressions =
-        extensions[i]->GetAllExpressions();
+  auto& extensions = platform.GetAllPlatformExtensions();
+  for (auto& extension : extensions) {
+    const auto& expressions = extension->GetAllExpressions();
     if (expressions.find(name) != expressions.end()) return true;
   }
 
@@ -386,18 +433,15 @@ bool MetadataProvider::HasExpression(const gd::Platform& platform,
 bool MetadataProvider::HasObjectExpression(const gd::Platform& platform,
                                            gd::String objectType,
                                            gd::String name) {
-  std::vector<std::shared_ptr<PlatformExtension> > extensions =
-      platform.GetAllPlatformExtensions();
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const std::map<gd::String, gd::ExpressionMetadata>& expressions =
-        extensions[i]->GetAllExpressionsForObject(objectType);
+  auto& extensions = platform.GetAllPlatformExtensions();
+  for (auto& extension : extensions) {
+    const auto& expressions = extension->GetAllExpressionsForObject(objectType);
     if (expressions.find(name) != expressions.end()) return true;
   }
 
   // Then check in functions of "Base object".
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const std::map<gd::String, gd::ExpressionMetadata>& expressions =
-        extensions[i]->GetAllExpressionsForObject("");
+  for (auto& extension : extensions) {
+    const auto& expressions = extension->GetAllExpressionsForObject("");
     if (expressions.find(name) != expressions.end()) return true;
   }
 
@@ -407,18 +451,16 @@ bool MetadataProvider::HasObjectExpression(const gd::Platform& platform,
 bool MetadataProvider::HasBehaviorExpression(const gd::Platform& platform,
                                              gd::String behaviorType,
                                              gd::String name) {
-  std::vector<std::shared_ptr<PlatformExtension> > extensions =
-      platform.GetAllPlatformExtensions();
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const std::map<gd::String, gd::ExpressionMetadata>& expressions =
-        extensions[i]->GetAllExpressionsForBehavior(behaviorType);
+  auto& extensions = platform.GetAllPlatformExtensions();
+  for (auto& extension : extensions) {
+    const auto& expressions =
+        extension->GetAllExpressionsForBehavior(behaviorType);
     if (expressions.find(name) != expressions.end()) return true;
   }
 
   // Then check in functions of "Base object".
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const std::map<gd::String, gd::ExpressionMetadata>& expressions =
-        extensions[i]->GetAllExpressionsForBehavior("");
+  for (auto& extension : extensions) {
+    const auto& expressions = extension->GetAllExpressionsForBehavior("");
     if (expressions.find(name) != expressions.end()) return true;
   }
 
@@ -427,11 +469,9 @@ bool MetadataProvider::HasBehaviorExpression(const gd::Platform& platform,
 
 bool MetadataProvider::HasStrExpression(const gd::Platform& platform,
                                         gd::String name) {
-  std::vector<std::shared_ptr<PlatformExtension> > extensions =
-      platform.GetAllPlatformExtensions();
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const std::map<gd::String, gd::ExpressionMetadata>& expressions =
-        extensions[i]->GetAllStrExpressions();
+  auto& extensions = platform.GetAllPlatformExtensions();
+  for (auto& extension : extensions) {
+    const auto& expressions = extension->GetAllStrExpressions();
     if (expressions.find(name) != expressions.end()) return true;
   }
 
@@ -441,18 +481,16 @@ bool MetadataProvider::HasStrExpression(const gd::Platform& platform,
 bool MetadataProvider::HasObjectStrExpression(const gd::Platform& platform,
                                               gd::String objectType,
                                               gd::String name) {
-  std::vector<std::shared_ptr<PlatformExtension> > extensions =
-      platform.GetAllPlatformExtensions();
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const std::map<gd::String, gd::ExpressionMetadata>& expressions =
-        extensions[i]->GetAllStrExpressionsForObject(objectType);
+  auto& extensions = platform.GetAllPlatformExtensions();
+  for (auto& extension : extensions) {
+    const auto& expressions =
+        extension->GetAllStrExpressionsForObject(objectType);
     if (expressions.find(name) != expressions.end()) return true;
   }
 
   // Then check in functions of "Base object".
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const std::map<gd::String, gd::ExpressionMetadata>& expressions =
-        extensions[i]->GetAllStrExpressionsForObject("");
+  for (auto& extension : extensions) {
+    const auto& expressions = extension->GetAllStrExpressionsForObject("");
     if (expressions.find(name) != expressions.end()) return true;
   }
 
@@ -462,18 +500,16 @@ bool MetadataProvider::HasObjectStrExpression(const gd::Platform& platform,
 bool MetadataProvider::HasBehaviorStrExpression(const gd::Platform& platform,
                                                 gd::String behaviorType,
                                                 gd::String name) {
-  std::vector<std::shared_ptr<PlatformExtension> > extensions =
-      platform.GetAllPlatformExtensions();
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const std::map<gd::String, gd::ExpressionMetadata>& expressions =
-        extensions[i]->GetAllStrExpressionsForBehavior(behaviorType);
+  auto& extensions = platform.GetAllPlatformExtensions();
+  for (auto& extension : extensions) {
+    const auto& expressions =
+        extension->GetAllStrExpressionsForBehavior(behaviorType);
     if (expressions.find(name) != expressions.end()) return true;
   }
 
   // Then check in functions of "Base object".
-  for (std::size_t i = 0; i < extensions.size(); ++i) {
-    const std::map<gd::String, gd::ExpressionMetadata>& expressions =
-        extensions[i]->GetAllStrExpressionsForBehavior("");
+  for (auto& extension : extensions) {
+    const auto& expressions = extension->GetAllStrExpressionsForBehavior("");
     if (expressions.find(name) != expressions.end()) return true;
   }
 

Core/GDCore/Extensions/Metadata/MetadataProvider.h

@@ -9,52 +9,159 @@
 #include "GDCore/String.h"
 namespace gd {
 class BehaviorMetadata;
-}
-namespace gd {
 class ObjectMetadata;
-}
-namespace gd {
 class ExpressionMetadata;
-}
-namespace gd {
 class ExpressionMetadata;
-}
-namespace gd {
 class Platform;
-}
+class PlatformExtension;
+}  // namespace gd
 
 namespace gd {
 
+/**
+ * \brief A container for metadata about an object/behavior/instruction/expression
+ * and its associated extension.
+ */
+template <class T>
+class ExtensionAndMetadata {
+ public:
+  ExtensionAndMetadata(const gd::PlatformExtension& extension_,
+                       const T& metadata_)
+      : extension(&extension_), metadata(&metadata_){};
+
+  /**
+   * \brief Default constructor, only here to satisfy Emscripten bindings.
+   * \warning Please do not use.
+   * \private
+   */
+  ExtensionAndMetadata()
+      : extension(nullptr), metadata(nullptr){};
+
+  /**
+   * \brief Get the associated extension.
+   */
+  const gd::PlatformExtension& GetExtension() { return *extension; };
+
+  /**
+   * \brief Get the metadata.
+   */
+  const T& GetMetadata() { return *metadata; };
+
+ private:
+  const gd::PlatformExtension* extension;
+  const T* metadata;
+};
+
 /**
  * \brief Allow to easily get metadata for instructions (i.e actions and
- * conditions), objects and behaviors.
+ * conditions), expressions, objects and behaviors.
  *
  * \ingroup PlatformDefinition
  */
 class GD_CORE_API MetadataProvider {
  public:
   /**
-   * Get the metadata about a behavior in a project using a platform
+   * Get the metadata about a behavior, and its associated extension.
+   */
+  static ExtensionAndMetadata<BehaviorMetadata> GetExtensionAndBehaviorMetadata(
+      const gd::Platform& platform, gd::String behaviorType);
+
+  /**
+   * Get the metadata about an object, and its associated extension.
+   */
+  static ExtensionAndMetadata<ObjectMetadata> GetExtensionAndObjectMetadata(
+      const gd::Platform& platform, gd::String type);
+
+  /**
+   * Get the metadata of an action, and its associated extension.
+   * Works for object, behaviors and static actions.
+   */
+  static ExtensionAndMetadata<InstructionMetadata>
+  GetExtensionAndActionMetadata(const gd::Platform& platform,
+                                gd::String actionType);
+
+  /**
+   * Get the metadata of a condition, and its associated extension.
+   * Works for object, behaviors and static conditions.
+   */
+  static ExtensionAndMetadata<InstructionMetadata>
+  GetExtensionAndConditionMetadata(const gd::Platform& platform,
+                                   gd::String conditionType);
+
+  /**
+   * Get information about an expression, and its associated extension.
+   * Works for static expressions.
+   */
+  static ExtensionAndMetadata<ExpressionMetadata>
+  GetExtensionAndExpressionMetadata(const gd::Platform& platform,
+                                    gd::String exprType);
+
+  /**
+   * Get information about an expression, and its associated extension.
+   * Works for object expressions.
+   */
+  static ExtensionAndMetadata<ExpressionMetadata>
+  GetExtensionAndObjectExpressionMetadata(const gd::Platform& platform,
+                                          gd::String objectType,
+                                          gd::String exprType);
+
+  /**
+   * Get information about an expression, and its associated extension.
+   * Works for behavior expressions.
+   */
+  static ExtensionAndMetadata<ExpressionMetadata>
+  GetExtensionAndBehaviorExpressionMetadata(const gd::Platform& platform,
+                                            gd::String autoType,
+                                            gd::String exprType);
+
+  /**
+   * Get information about a string expression, and its associated extension.
+   * Works for static expressions.
+   */
+  static ExtensionAndMetadata<ExpressionMetadata>
+  GetExtensionAndStrExpressionMetadata(const gd::Platform& platform,
+                                       gd::String exprType);
+
+  /**
+   * Get information about a string expression, and its associated extension.
+   * Works for object expressions.
+   */
+  static ExtensionAndMetadata<ExpressionMetadata>
+  GetExtensionAndObjectStrExpressionMetadata(const gd::Platform& platform,
+                                             gd::String objectType,
+                                             gd::String exprType);
+
+  /**
+   * Get information about a string expression, and its associated extension.
+   * Works for behavior expressions.
+   */
+  static ExtensionAndMetadata<ExpressionMetadata>
+  GetExtensionAndBehaviorStrExpressionMetadata(const gd::Platform& platform,
+                                               gd::String autoType,
+                                               gd::String exprType);
+
+  /**
+   * Get the metadata about a behavior.
    */
   static const BehaviorMetadata& GetBehaviorMetadata(
       const gd::Platform& platform, gd::String behaviorType);
 
   /**
-   * Get the metadata about an object in a project using a platform
+   * Get the metadata about an object.
    */
   static const ObjectMetadata& GetObjectMetadata(const gd::Platform& platform,
                                                  gd::String type);
 
   /**
    * Get the metadata of an action.
-   * Must work for object, behaviors and static actions.
+   * Works for object, behaviors and static actions.
    */
   static const gd::InstructionMetadata& GetActionMetadata(
       const gd::Platform& platform, gd::String actionType);
 
   /**
    * Get the metadata of a condition.
-   * Must Work for object, behaviors and static conditions.
+   * Works for object, behaviors and static conditions.
    */
   static const gd::InstructionMetadata& GetConditionMetadata(
       const gd::Platform& platform, gd::String conditionType);
@@ -81,109 +188,109 @@ class GD_CORE_API MetadataProvider {
       const gd::Platform& platform, gd::String autoType, gd::String exprType);
 
   /**
-   * Get information about a gd::String expression from its type
+   * Get information about a string expression from its type
    * Works for static expressions.
    */
   static const gd::ExpressionMetadata& GetStrExpressionMetadata(
       const gd::Platform& platform, gd::String exprType);
 
   /**
-   * Get information about a gd::String expression from its type
+   * Get information about a string expression from its type
    * Works for object expressions.
    */
   static const gd::ExpressionMetadata& GetObjectStrExpressionMetadata(
       const gd::Platform& platform, gd::String objectType, gd::String exprType);
 
   /**
-   * Get information about a gd::String expression from its type
+   * Get information about a string expression from its type
    * Works for behavior expressions.
    */
   static const gd::ExpressionMetadata& GetBehaviorStrExpressionMetadata(
       const gd::Platform& platform, gd::String autoType, gd::String exprType);
 
   /**
-   * Verifying if a ( static ) condition exists
-   * @return true if the ( static ) condition exists
+   * \brief Check if a (static) condition exists
+   * @return true if the (static) condition exists
    */
   static bool HasCondition(const gd::Platform& platform, gd::String name);
 
   /**
-   * Verifying if a ( static ) action exists
-   * @return true if the ( static ) action exists
+   * \brief Check if a (static) action exists
+   * @return true if the (static) action exists
    */
   static bool HasAction(const gd::Platform& platform, gd::String name);
 
   /**
-   * Verifying if a ( object ) action exists
-   * @return true if the ( object ) action exists
+   * \brief Check if a (object) action exists
+   * @return true if the (object) action exists
    */
   static bool HasObjectAction(const gd::Platform& platform,
                               gd::String objectType,
                               gd::String name);
 
   /**
-   * Verifying if a ( object ) condition exists
-   * @return true if the ( object ) condition exists
+   * \brief Check if a (object) condition exists
+   * @return true if the (object) condition exists
    */
   static bool HasObjectCondition(const gd::Platform& platform,
                                  gd::String objectType,
                                  gd::String name);
 
   /**
-   * Verifying if a ( Behavior ) action exists
-   * @return true if the ( Behavior ) action exists
+   * \brief Check if a (behavior) action exists
+   * @return true if the (behavior) action exists
    */
   static bool HasBehaviorAction(const gd::Platform& platform,
                                 gd::String behaviorType,
                                 gd::String name);
 
   /**
-   * Verifying if a ( Behavior ) condition exists
-   * @return true if the ( Behavior ) condition exists
+   * \brief Check if a (behavior) condition exists
+   * @return true if the (behavior) condition exists
    */
   static bool HasBehaviorCondition(const gd::Platform& platform,
                                    gd::String behaviorType,
                                    gd::String name);
 
   /**
-   * Verifying if a ( static ) expression exists
-   * @return true if the ( static ) expression exists
+   * \brief Check if a (static) expression exists
+   * @return true if the (static) expression exists
    */
   static bool HasExpression(const gd::Platform& platform, gd::String name);
 
   /**
-   * Verifying if a ( object ) expression exists
-   * @return true if the ( object ) expression exists
+   * \brief Check if a (object) expression exists
+   * @return true if the (object) expression exists
    */
   static bool HasObjectExpression(const gd::Platform& platform,
                                   gd::String objectType,
                                   gd::String name);
 
   /**
-   * Verifying if a ( behavior ) expression exists
-   * @return true if the ( behavior ) expression exists
+   * \brief Check if a (behavior) expression exists
+   * @return true if the (behavior) expression exists
    */
   static bool HasBehaviorExpression(const gd::Platform& platform,
                                     gd::String behaviorType,
                                     gd::String name);
 
   /**
-   * Verifying if a ( static ) gd::String expression exists
-   * @return true if the ( static ) gd::String expression exists
+   * \brief Check if a (static) string expression exists
+   * @return true if the (static) string expression exists
    */
   static bool HasStrExpression(const gd::Platform& platform, gd::String name);
 
   /**
-   * Verifying if a ( object ) gd::String expression exists
-   * @return true if the ( object ) gd::String expression exists
+   * \brief Check if a (object) string expression exists
+   * @return true if the (object) string expression exists
    */
   static bool HasObjectStrExpression(const gd::Platform& platform,
                                      gd::String objectType,
                                      gd::String name);
 
   /**
-   * Verifying if a ( object ) gd::String expression exists
-   * @return true if the ( object ) gd::String expression exists
+   * \brief Check if a (behavior) string expression exists
+   * @return true if the (behavior) string expression exists
    */
   static bool HasBehaviorStrExpression(const gd::Platform& platform,
                                        gd::String behaviorType,
@@ -194,6 +301,7 @@ class GD_CORE_API MetadataProvider {
  private:
   MetadataProvider();
 
+  static PlatformExtension badExtension;
   static BehaviorMetadata badBehaviorInfo;
   static ObjectMetadata badObjectInfo;
   static gd::InstructionMetadata badInstructionMetadata;

Core/GDCore/Extensions/Metadata/ObjectMetadata.cpp

@@ -8,6 +8,7 @@
 #include <iostream>
 #include "GDCore/Extensions/Metadata/ExpressionMetadata.h"
 #include "GDCore/Extensions/Metadata/InstructionMetadata.h"
+#include "GDCore/Project/Object.h"
 #if defined(GD_IDE_ONLY) && !defined(GD_NO_WX_GUI)
 #include <wx/bitmap.h>
 #include <wx/file.h>
@@ -19,14 +20,58 @@ namespace gd {
 ObjectMetadata::ObjectMetadata(const gd::String& extensionNamespace_,
                                const gd::String& name_,
                                const gd::String& fullname_,
-                               const gd::String& informations_,
+                               const gd::String& description_,
+                               const gd::String& icon24x24,
+                               std::shared_ptr<gd::Object> blueprintObject_)
+    : extensionNamespace(extensionNamespace_),
+      blueprintObject(blueprintObject_) {
+  name = name_;
+#if defined(GD_IDE_ONLY)
+  SetFullName(gd::String(fullname_));
+  SetDescription(gd::String(description_));
+  iconFilename = icon24x24;
+#if !defined(GD_NO_WX_GUI)
+  if (!iconFilename.empty()) {
+    if (gd::SkinHelper::IconExists(icon24x24, 24))
+      SetBitmapIcon(gd::SkinHelper::GetIcon(icon24x24, 24));
+    else if (wxFile::Exists(icon24x24))
+      SetBitmapIcon(wxBitmap(icon24x24, wxBITMAP_TYPE_ANY));
+    else {
+      std::cout << "Warning: The icon file for object \"" << name_
+                << " was not found in the current skin icons"
+                << " and the specified name is not an existing filename.";
+      SetBitmapIcon(wxBitmap(24, 24));
+    }
+  }
+#endif
+#endif
+  createFunPtr =
+      [blueprintObject_](gd::String name) -> std::unique_ptr<gd::Object> {
+    if (blueprintObject_ == std::shared_ptr<gd::Object>()) {
+      std::cout
+          << "Error: Unable to create object. Have you declared an extension "
+             "(or ObjectMetadata) without specifying an object as blueprint?"
+          << std::endl;
+      return nullptr;
+    }
+
+    std::unique_ptr<gd::Object> newObject = blueprintObject_->Clone();
+    newObject->SetName(name);
+    return newObject;
+  };
+}
+
+ObjectMetadata::ObjectMetadata(const gd::String& extensionNamespace_,
+                               const gd::String& name_,
+                               const gd::String& fullname_,
+                               const gd::String& description_,
                                const gd::String& icon24x24,
                                CreateFunPtr createFunPtrP)
     : extensionNamespace(extensionNamespace_) {
   name = name_;
 #if defined(GD_IDE_ONLY)
   SetFullName(gd::String(fullname_));
-  SetDescription(gd::String(informations_));
+  SetDescription(gd::String(description_));
   iconFilename = icon24x24;
 #if !defined(GD_NO_WX_GUI)
   if (!iconFilename.empty()) {
@@ -64,7 +109,8 @@ gd::InstructionMetadata& ObjectMetadata::AddCondition(
                                                            sentence,
                                                            group,
                                                            icon,
-                                                           smallicon);
+                                                           smallicon)
+                                           .SetHelpPath(GetHelpPath());
   return conditionsInfos[nameWithNamespace];
 #endif
 }
@@ -87,7 +133,8 @@ gd::InstructionMetadata& ObjectMetadata::AddAction(
                                                         sentence,
                                                         group,
                                                         icon,
-                                                        smallicon);
+                                                        smallicon)
+                                        .SetHelpPath(GetHelpPath());
   return actionsInfos[nameWithNamespace];
 #endif
 }

Core/GDCore/Extensions/Metadata/ObjectMetadata.h

@@ -7,24 +7,21 @@
 #define OBJECTMETADATA_H
 #include <map>
 #include <memory>
+#include <functional>
 #include "GDCore/Extensions/Metadata/ExpressionMetadata.h"
 #include "GDCore/Extensions/Metadata/InstructionMetadata.h"
+#include "GDCore/Project/Object.h"
 #include "GDCore/String.h"
 #if defined(GD_IDE_ONLY) && !defined(GD_NO_WX_GUI)
 #include <wx/bitmap.h>
 #endif
 namespace gd {
-class Object;
-}
-namespace gd {
 class InstructionMetadata;
-}
-namespace gd {
 class ExpressionMetadata;
-}
+}  // namespace gd
 class wxBitmap;
 
-typedef std::unique_ptr<gd::Object> (*CreateFunPtr)(gd::String name);
+typedef std::function<std::unique_ptr<gd::Object>(gd::String name)> CreateFunPtr;
 
 namespace gd {
 
@@ -36,10 +33,25 @@ namespace gd {
  */
 class GD_CORE_API ObjectMetadata {
  public:
+  /**
+   * \brief Construct an object metadata, using a "blueprint" object that will
+   * be copied when a new object is asked.
+   */
   ObjectMetadata(const gd::String& extensionNamespace_,
                  const gd::String& name_,
                  const gd::String& fullname_,
-                 const gd::String& informations_,
+                 const gd::String& description_,
+                 const gd::String& icon24x24_,
+                 std::shared_ptr<gd::Object> blueprintObject_);
+
+  /**
+   * \brief Construct an object metadata, with a function that will be called
+   * to instanciate a new object.
+   */
+  ObjectMetadata(const gd::String& extensionNamespace_,
+                 const gd::String& name_,
+                 const gd::String& fullname_,
+                 const gd::String& description_,
                  const gd::String& icon24x24_,
                  CreateFunPtr createFunPtrP);
   ObjectMetadata() : createFunPtr(NULL) {}
@@ -105,6 +117,22 @@ class GD_CORE_API ObjectMetadata {
    */
   ObjectMetadata& SetBitmapIcon(const wxBitmap& bitmap_);
 
+  /**
+   * Get the help path of the object, relative to the documentation root.
+   */
+  const gd::String &GetHelpPath() const { return helpPath; }
+
+  /**
+   * Set the help path of the object, relative to the documentation root.
+   * 
+   * The object instructions will have this help path set by
+   * default, unless you call SetHelpPath on them.
+   */
+  ObjectMetadata &SetHelpPath(const gd::String &path) {
+    helpPath = path;
+    return *this;
+  }
+
   const gd::String& GetName() const { return name; }
 #if defined(GD_IDE_ONLY)
   const gd::String& GetFullName() const { return fullname; }
@@ -119,6 +147,7 @@ class GD_CORE_API ObjectMetadata {
   /**
    * \brief Set the URL pointing to the help page about this object
    * \note The path to the page must be relative to the wiki url.
+   * \deprecated Use SetHelpPath instead
    */
   ObjectMetadata& SetHelpUrl(const gd::String& url);
 
@@ -148,8 +177,9 @@ class GD_CORE_API ObjectMetadata {
  private:
   gd::String extensionNamespace;
   gd::String name;
+  gd::String helpPath;
 #if defined(GD_IDE_ONLY)
-  gd::String helpUrl;
+  gd::String helpUrl; ///< Deprecated. Use helpPath instead.
   gd::String fullname;
   gd::String description;
   gd::String iconFilename;
@@ -157,6 +187,10 @@ class GD_CORE_API ObjectMetadata {
   wxBitmap icon;
 #endif
 #endif
+  std::shared_ptr<gd::Object>
+      blueprintObject;  ///< The "blueprint" object to be copied when a new
+                        ///< object is asked. Can be null in case a creation
+                        ///< function is passed.
 };
 
 }  // namespace gd

Core/GDCore/Extensions/Platform.cpp

@@ -20,20 +20,21 @@ namespace gd {
 gd::ChangesNotifier Platform::defaultEmptyChangesNotifier;
 #endif
 
-Platform::Platform() {
-}
+Platform::Platform() {}
 
-Platform::~Platform() {
-}
+Platform::~Platform() {}
 
 bool Platform::AddExtension(std::shared_ptr<gd::PlatformExtension> extension) {
   std::cout << extension->GetName();
+  bool loaded = false;
   for (std::size_t i = 0; i < extensionsLoaded.size(); ++i) {
     if (extensionsLoaded[i]->GetName() == extension->GetName()) {
-      std::cout << "(Already loaded!)" << std::endl;
-      return false;
+      std::cout << "(replacing existing extension)" << std::endl;
+      extensionsLoaded[i] = extension;
+      loaded = true;
     }
   }
+  if (!loaded) extensionsLoaded.push_back(extension);
 
   // Load all creation/destruction functions for objects provided by the
   // extension
@@ -43,7 +44,6 @@ bool Platform::AddExtension(std::shared_ptr<gd::PlatformExtension> extension) {
         extension->GetObjectCreationFunctionPtr(objectsTypes[i]);
   }
 
-  extensionsLoaded.push_back(extension);
   std::cout << ", ";
   return true;
 }

Core/GDCore/Extensions/Platform.h

@@ -25,9 +25,9 @@ class BehaviorsSharedData;
 class PlatformExtension;
 class LayoutEditorCanvas;
 class ProjectExporter;
-}
+}  // namespace gd
 
-typedef std::unique_ptr<gd::Object> (*CreateFunPtr)(gd::String name);
+typedef std::function<std::unique_ptr<gd::Object>(gd::String name)> CreateFunPtr;
 
 #undef CreateEvent
 

Core/GDCore/Extensions/PlatformExtension.cpp

@@ -50,7 +50,8 @@ gd::InstructionMetadata& PlatformExtension::AddCondition(
                                                            sentence,
                                                            group,
                                                            icon,
-                                                           smallicon);
+                                                           smallicon)
+                                           .SetHelpPath(GetHelpPath());
   return conditionsInfos[nameWithNamespace];
 #endif
 }
@@ -73,7 +74,8 @@ gd::InstructionMetadata& PlatformExtension::AddAction(
                                                         sentence,
                                                         group,
                                                         icon,
-                                                        smallicon);
+                                                        smallicon)
+                                        .SetHelpPath(GetHelpPath());
   return actionsInfos[nameWithNamespace];
 #endif
 }
@@ -116,6 +118,25 @@ gd::ExpressionMetadata& PlatformExtension::AddStrExpression(
 #endif
 }
 
+gd::ObjectMetadata& PlatformExtension::AddObject(
+    const gd::String& name,
+    const gd::String& fullname,
+    const gd::String& description,
+    const gd::String& icon24x24,
+    std::shared_ptr<gd::Object> instance) {
+  gd::String nameWithNamespace =
+      GetNameSpace().empty() ? name : GetNameSpace() + name;
+  objectsInfos[nameWithNamespace] = ObjectMetadata(GetNameSpace(),
+                                                   nameWithNamespace,
+                                                   fullname,
+                                                   description,
+                                                   icon24x24,
+                                                   instance)
+                                        .SetHelpPath(GetHelpPath());
+
+  return objectsInfos[nameWithNamespace];
+}
+
 gd::BehaviorMetadata& PlatformExtension::AddBehavior(
     const gd::String& name,
     const gd::String& fullname,
@@ -137,7 +158,8 @@ gd::BehaviorMetadata& PlatformExtension::AddBehavior(
                                                       icon24x24,
                                                       className,
                                                       instance,
-                                                      sharedDatasInstance);
+                                                      sharedDatasInstance)
+                                         .SetHelpPath(GetHelpPath());
   return behaviorsInfo[nameWithNamespace];
 }
 
@@ -161,17 +183,19 @@ gd::EventMetadata& PlatformExtension::AddEvent(
 #endif
 }
 
-void PlatformExtension::SetExtensionInformation(const gd::String& name_,
-                                                const gd::String& fullname_,
-                                                const gd::String& description_,
-                                                const gd::String& author_,
-                                                const gd::String& license_) {
+PlatformExtension& PlatformExtension::SetExtensionInformation(
+    const gd::String& name_,
+    const gd::String& fullname_,
+    const gd::String& description_,
+    const gd::String& author_,
+    const gd::String& license_) {
   name = name_;
   fullname = fullname_;
   informations = description_;
   author = author_;
   license = license_;
   SetNameSpace(name_);
+  return *this;
 }
 
 std::vector<gd::String> PlatformExtension::GetExtensionObjectsTypes() const {
@@ -399,131 +423,6 @@ bool PlatformExtension::IsBuiltin() const {
 }
 
 #if defined(GD_IDE_ONLY)
-void PlatformExtension::CloneExtension(
-    const gd::String& platformName,
-    const gd::String& extensionName,
-    bool stripFunctionsNameAndCodeGeneration) {
-  gd::Platform* platform =
-      gd::PlatformManager::Get()->GetPlatform(platformName);
-  if (!platform) {
-    std::cout << "Unable to clone extension \"" << extensionName << "\" from "
-              << platformName << ": This platform doesn't exist.";
-    return;
-  }
-
-  std::shared_ptr<gd::PlatformExtension> extension =
-      platform->GetExtension(extensionName);
-  if (!extension) {
-    std::cout << "Unable to clone extension \"" << extensionName << "\" from "
-              << platformName << ": This extension doesn't exist.";
-    return;
-  }
-
-  *this = *extension;
-
-  if (stripFunctionsNameAndCodeGeneration) {
-    for (std::map<gd::String, gd::InstructionMetadata>::iterator it =
-             GetAllActions().begin();
-         it != GetAllActions().end();
-         ++it)
-      it->second.SetFunctionName("").SetGetter("").RemoveCustomCodeGenerator();
-
-    for (std::map<gd::String, gd::InstructionMetadata>::iterator it =
-             GetAllConditions().begin();
-         it != GetAllConditions().end();
-         ++it)
-      it->second.SetFunctionName("").SetGetter("").RemoveCustomCodeGenerator();
-
-    for (std::map<gd::String, gd::ExpressionMetadata>::iterator it =
-             GetAllExpressions().begin();
-         it != GetAllExpressions().end();
-         ++it)
-      it->second.SetFunctionName("").RemoveCustomCodeGenerator();
-
-    for (std::map<gd::String, gd::ExpressionMetadata>::iterator it =
-             GetAllStrExpressions().begin();
-         it != GetAllStrExpressions().end();
-         ++it)
-      it->second.SetFunctionName("").RemoveCustomCodeGenerator();
-
-    for (std::map<gd::String, gd::ObjectMetadata>::iterator objIt =
-             objectsInfos.begin();
-         objIt != objectsInfos.end();
-         ++objIt) {
-      gd::ObjectMetadata& obj = objIt->second;
-
-      for (std::map<gd::String, gd::InstructionMetadata>::iterator it =
-               obj.actionsInfos.begin();
-           it != obj.actionsInfos.end();
-           ++it)
-        it->second.SetFunctionName("")
-            .SetGetter("")
-            .RemoveCustomCodeGenerator();
-
-      for (std::map<gd::String, gd::InstructionMetadata>::iterator it =
-               obj.conditionsInfos.begin();
-           it != obj.conditionsInfos.end();
-           ++it)
-        it->second.SetFunctionName("")
-            .SetGetter("")
-            .RemoveCustomCodeGenerator();
-
-      for (std::map<gd::String, gd::ExpressionMetadata>::iterator it =
-               obj.expressionsInfos.begin();
-           it != obj.expressionsInfos.end();
-           ++it)
-        it->second.SetFunctionName("").RemoveCustomCodeGenerator();
-
-      for (std::map<gd::String, gd::ExpressionMetadata>::iterator it =
-               obj.strExpressionsInfos.begin();
-           it != obj.strExpressionsInfos.end();
-           ++it)
-        it->second.SetFunctionName("").RemoveCustomCodeGenerator();
-    }
-
-    for (std::map<gd::String, gd::BehaviorMetadata>::iterator objIt =
-             behaviorsInfo.begin();
-         objIt != behaviorsInfo.end();
-         ++objIt) {
-      gd::BehaviorMetadata& obj = objIt->second;
-
-      for (std::map<gd::String, gd::InstructionMetadata>::iterator it =
-               obj.actionsInfos.begin();
-           it != obj.actionsInfos.end();
-           ++it)
-        it->second.SetFunctionName("")
-            .SetGetter("")
-            .RemoveCustomCodeGenerator();
-
-      for (std::map<gd::String, gd::InstructionMetadata>::iterator it =
-               obj.conditionsInfos.begin();
-           it != obj.conditionsInfos.end();
-           ++it)
-        it->second.SetFunctionName("")
-            .SetGetter("")
-            .RemoveCustomCodeGenerator();
-
-      for (std::map<gd::String, gd::ExpressionMetadata>::iterator it =
-               obj.expressionsInfos.begin();
-           it != obj.expressionsInfos.end();
-           ++it)
-        it->second.SetFunctionName("").RemoveCustomCodeGenerator();
-
-      for (std::map<gd::String, gd::ExpressionMetadata>::iterator it =
-               obj.strExpressionsInfos.begin();
-           it != obj.strExpressionsInfos.end();
-           ++it)
-        it->second.SetFunctionName("").RemoveCustomCodeGenerator();
-    }
-
-    for (std::map<gd::String, gd::EventMetadata>::iterator it =
-             eventsInfos.begin();
-         it != eventsInfos.end();
-         ++it)
-      it->second.ClearCodeGenerationAndPreprocessing();
-  }
-}
-
 void PlatformExtension::StripUnimplementedInstructionsAndExpressions() {
   for (std::map<gd::String, gd::InstructionMetadata>::iterator it =
            GetAllActions().begin();

Core/GDCore/Extensions/PlatformExtension.h

@@ -19,42 +19,21 @@
 
 namespace gd {
 class Instruction;
-}
-namespace gd {
 class InstructionMetadata;
-}
-namespace gd {
 class ExpressionMetadata;
-}
-namespace gd {
 class ObjectMetadata;
-}
-namespace gd {
 class BehaviorMetadata;
-}
-namespace gd {
 class BaseEvent;
-}
-namespace gd {
 class EventMetadata;
-}
-namespace gd {
 class EventCodeGenerator;
-}
-namespace gd {
 class ArbitraryResourceWorker;
-}
-namespace gd {
 class BehaviorsSharedData;
-}
-namespace gd {
 class Behavior;
-}
-namespace gd {
 class Object;
-}
+}  // namespace gd
 
-typedef std::unique_ptr<gd::Object> (*CreateFunPtr)(gd::String name);
+typedef std::function<std::unique_ptr<gd::Object>(gd::String name)>
+    CreateFunPtr;
 
 namespace gd {
 
@@ -107,11 +86,24 @@ class GD_CORE_API PlatformExtension {
   /**
    * \brief Must be called to declare the main information about the extension.
    */
-  void SetExtensionInformation(const gd::String& name_,
-                               const gd::String& fullname_,
-                               const gd::String& description_,
-                               const gd::String& author_,
-                               const gd::String& license_);
+  PlatformExtension& SetExtensionInformation(const gd::String& name_,
+                                             const gd::String& fullname_,
+                                             const gd::String& description_,
+                                             const gd::String& author_,
+                                             const gd::String& license_);
+
+  /**
+   * \brief Set the path to the help, relative to the wiki/documentation root.
+   * For example, "/all-features/collisions" for
+   * "http://wiki.compilgames.net/doku.php/gdevelop5/all-features/collisions".
+   *
+   * The instructions, objects and behaviors will have this help path set by
+   * default, unless you call SetHelpPath on them.
+   */
+  PlatformExtension& SetExtensionHelpPath(const gd::String& helpPath_) {
+    helpPath = helpPath_;
+    return *this;
+  }
 
   /**
    * \brief Mark this extension as deprecated: the IDE will hide it from the
@@ -171,7 +163,6 @@ class GD_CORE_API PlatformExtension {
    * \param icon The 24x24 icon of the object:
    res/icons_[SkinName]/[iconName]24.png will be first tried,
    * and then if it does not exists, the full entered name will be tried.
-   \endcode
    */
   template <class T>
   gd::ObjectMetadata& AddObject(const gd::String& name_,
@@ -179,6 +170,24 @@ class GD_CORE_API PlatformExtension {
                                 const gd::String& description_,
                                 const gd::String& icon24x24_);
 
+  /**
+   * \brief Declare a new object as being part of the extension.
+   * \note This method does nothing when used for GD C++ runtime.
+   * \param name The name of the object
+   * \param fullname The user friendly name of the object
+   * \param description The user friendly description of the object
+   * \param icon The 24x24 icon of the object:
+   res/icons_[SkinName]/[iconName]24.png will be first tried,
+   * and then if it does not exists, the full entered name will be tried.
+   * \param instance The "blueprint" object to be copied when a new object is
+   asked for.
+   */
+  gd::ObjectMetadata& AddObject(const gd::String& name_,
+                                const gd::String& fullname_,
+                                const gd::String& description_,
+                                const gd::String& icon24x24_,
+                                std::shared_ptr<gd::Object> instance);
+
   /**
    * \brief Declare a new behavior as being part of the extension.
    * \note This method does nothing when used for GD C++ runtime.
@@ -240,6 +249,12 @@ class GD_CORE_API PlatformExtension {
    */
   const gd::String& GetLicense() const { return license; }
 
+  /**
+   * \brief Return the help path of extension, relative to the
+   * wiki/documentation root.
+   */
+  const gd::String& GetHelpPath() const { return helpPath; }
+
   /**
    * \brief Check if the extension is flagged as being deprecated.
    */
@@ -404,24 +419,6 @@ class GD_CORE_API PlatformExtension {
   virtual void ExposeActionsResources(Instruction& action,
                                       gd::ArbitraryResourceWorker& worker){};
 
-  /**
-   * \brief Clone the extension of another platform.
-   *
-   * This can be used when you want a platform to conform to another.<br>
-   * It is still possible to make some changes after the cloning by using getter
-   * methods.<br> See also
-   * gd::PlatformExtension::StripUnimplementedInstructionsAndExpressions.
-   *
-   * \param platformName The name of the platform in which the source extension
-   * must be searched for. \param extensionName The name of the source extension
-   * to be copied. \param stripFunctionsNameAndCodeGeneration If set to true,
-   * all functions names and code generator of all
-   * instructions/expression/events will be removed.
-   */
-  void CloneExtension(const gd::String& platformName,
-                      const gd::String& extensionName,
-                      bool stripFunctionsNameAndCodeGeneration = true);
-
   /**
    * \brief Delete all instructions having no functions name or custom code
    * generator.
@@ -451,7 +448,10 @@ class GD_CORE_API PlatformExtension {
   gd::String informations;  ///< Description displayed to users at edittime
   gd::String author;        ///< Author displayed to users at edittime
   gd::String license;       ///< License name displayed to users at edittime
-  bool deprecated;
+  bool deprecated;  ///< true if the extension is deprecated and shouldn't be
+                    ///< shown in IDE.
+  gd::String helpPath;  ///< The relative path to the help for this extension in
+                        ///< the documentation.
 
   std::map<gd::String, gd::ObjectMetadata> objectsInfos;
   std::map<gd::String, gd::BehaviorMetadata> behaviorsInfo;

Core/GDCore/Extensions/PlatformExtension.inl

@@ -27,7 +27,8 @@ gd::ObjectMetadata& PlatformExtension::AddObject(const gd::String& name,
                      icon24x24,
                      [](gd::String name) -> std::unique_ptr<gd::Object> {
                        return gd::make_unique<T>(name);
-                     });
+                     })
+          .SetHelpPath(GetHelpPath());
 
   return objectsInfos[nameWithNamespace];
 }

Core/GDCore/IDE/Events/ArbitraryEventsWorker.cpp

@@ -6,6 +6,7 @@
 #include "GDCore/IDE/Events/ArbitraryEventsWorker.h"
 #include <map>
 #include <memory>
+#include <iostream>
 #include <vector>
 #include "GDCore/Events/Event.h"
 #include "GDCore/Events/EventsList.h"

Core/GDCore/IDE/Events/ArbitraryEventsWorker.h

@@ -12,11 +12,7 @@
 #include "GDCore/String.h"
 namespace gd {
 class Instruction;
-}
-namespace gd {
 class BaseEvent;
-}
-namespace gd {
 class EventsList;
 }
 

Core/GDCore/IDE/Events/EventsContextAnalyzer.cpp

@@ -0,0 +1,188 @@
+/*
+ * 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/Events/EventsContextAnalyzer.h"
+#include <map>
+#include <memory>
+#include <vector>
+#include "GDCore/Events/Event.h"
+#include "GDCore/Events/EventsList.h"
+#include "GDCore/Events/Parsers/ExpressionParser.h"
+#include "GDCore/Extensions/Metadata/ExpressionMetadata.h"
+#include "GDCore/Extensions/Metadata/InstructionMetadata.h"
+#include "GDCore/Extensions/Metadata/MetadataProvider.h"
+#include "GDCore/Project/Layout.h"
+#include "GDCore/Project/Project.h"
+#include "GDCore/String.h"
+
+namespace gd {
+
+class CallbacksForListingObjects : public gd::ParserCallbacks {
+ public:
+  CallbacksForListingObjects(const gd::Platform& platform_,
+                             const gd::Project& project_,
+                             const gd::Layout& layout_,
+                             EventsContext& context_)
+      : platform(platform_),
+        project(project_),
+        layout(layout_),
+        context(context_){};
+  virtual ~CallbacksForListingObjects(){};
+
+  virtual void OnConstantToken(gd::String text){};
+
+  virtual void OnStaticFunction(gd::String functionName,
+                                const std::vector<gd::Expression>& parameters,
+                                const gd::ExpressionMetadata& expressionInfo) {
+    for (std::size_t i = 0;
+         i < parameters.size() && i < expressionInfo.parameters.size();
+         ++i) {
+      EventsContextAnalyzer::AnalyzeParameter(platform,
+                                              project,
+                                              layout,
+                                              expressionInfo.parameters[i],
+                                              parameters[i],
+                                              context);
+    }
+  };
+
+  virtual void OnObjectFunction(gd::String functionName,
+                                const std::vector<gd::Expression>& parameters,
+                                const gd::ExpressionMetadata& expressionInfo) {
+    for (std::size_t i = 0;
+         i < parameters.size() && i < expressionInfo.parameters.size();
+         ++i) {
+      EventsContextAnalyzer::AnalyzeParameter(platform,
+                                              project,
+                                              layout,
+                                              expressionInfo.parameters[i],
+                                              parameters[i],
+                                              context);
+    }
+  };
+
+  virtual void OnObjectBehaviorFunction(
+      gd::String functionName,
+      const std::vector<gd::Expression>& parameters,
+      const gd::ExpressionMetadata& expressionInfo) {
+    for (std::size_t i = 0;
+         i < parameters.size() && i < expressionInfo.parameters.size();
+         ++i) {
+      EventsContextAnalyzer::AnalyzeParameter(platform,
+                                              project,
+                                              layout,
+                                              expressionInfo.parameters[i],
+                                              parameters[i],
+                                              context);
+    }
+  };
+
+  virtual bool OnSubMathExpression(const gd::Platform& platform,
+                                   const gd::Project& project,
+                                   const gd::Layout& layout,
+                                   gd::Expression& expression) {
+    CallbacksForListingObjects callbacks(platform, project, layout, context);
+
+    gd::ExpressionParser parser(expression.GetPlainString());
+    parser.ParseMathExpression(platform, project, layout, callbacks);
+    return true;
+  }
+
+  virtual bool OnSubTextExpression(const gd::Platform& platform,
+                                   const gd::Project& project,
+                                   const gd::Layout& layout,
+                                   gd::Expression& expression) {
+    CallbacksForListingObjects callbacks(platform, project, layout, context);
+
+    gd::ExpressionParser parser(expression.GetPlainString());
+    parser.ParseStringExpression(platform, project, layout, callbacks);
+    return true;
+  }
+
+ private:
+  const gd::Platform& platform;
+  const gd::Project& project;
+  const gd::Layout& layout;
+  EventsContext& context;
+};
+
+bool EventsContextAnalyzer::DoVisitInstruction(gd::Instruction& instruction,
+                                               bool isCondition) {
+  const gd::InstructionMetadata& instrInfo =
+      isCondition ? MetadataProvider::GetConditionMetadata(
+                        project.GetCurrentPlatform(), instruction.GetType())
+                  : MetadataProvider::GetActionMetadata(
+                        project.GetCurrentPlatform(), instruction.GetType());
+
+  for (int i = 0; i < instruction.GetParametersCount() &&
+                  i < instrInfo.GetParametersCount();
+       ++i) {
+    AnalyzeParameter(platform,
+                     project,
+                     layout,
+                     instrInfo.GetParameter(i),
+                     instruction.GetParameter(i),
+                     context);
+  }
+
+  return false;
+}
+
+void EventsContextAnalyzer::AnalyzeParameter(
+    const gd::Platform& platform,
+    const gd::Project& project,
+    const gd::Layout& layout,
+    const gd::ParameterMetadata& metadata,
+    const gd::Expression& parameter,
+    EventsContext& context) {
+  const auto& value = parameter.GetPlainString();
+  const auto& type = metadata.GetType();
+  if (ParameterMetadata::IsObject(type)) {
+    context.AddObjectName(value);
+  } else if (ParameterMetadata::IsExpression("number", type)) {
+    CallbacksForListingObjects callbacks(platform, project, layout, context);
+
+    gd::ExpressionParser parser(value);
+    parser.ParseMathExpression(platform, project, layout, callbacks);
+  } else if (ParameterMetadata::IsExpression("string", type)) {
+    CallbacksForListingObjects callbacks(platform, project, layout, context);
+
+    gd::ExpressionParser parser(value);
+    parser.ParseStringExpression(platform, project, layout, callbacks);
+  }
+}
+
+void EventsContext::AddObjectName(const gd::String& objectName) {
+  for (auto& realObjectName : ExpandObjectsName(objectName)) {
+    objectNames.insert(realObjectName);
+  }
+  objectOrGroupNames.insert(objectName);
+}
+
+std::vector<gd::String> EventsContext::ExpandObjectsName(
+    const gd::String& objectName) {
+  // Note: this logic is duplicated in EventsCodeGenerator::ExpandObjectsName
+  std::vector<gd::String> realObjects;
+  if (project.GetObjectGroups().Has(objectName))
+    realObjects =
+        project.GetObjectGroups().Get(objectName).GetAllObjectsNames();
+  else if (layout.GetObjectGroups().Has(objectName))
+    realObjects = layout.GetObjectGroups().Get(objectName).GetAllObjectsNames();
+  else
+    realObjects.push_back(objectName);
+
+  // Ensure that all returned objects actually exists.
+  for (std::size_t i = 0; i < realObjects.size();) {
+    if (!layout.HasObjectNamed(realObjects[i]) &&
+        !project.HasObjectNamed(realObjects[i]))
+      realObjects.erase(realObjects.begin() + i);
+    else
+      ++i;
+  }
+
+  return realObjects;
+}
+
+}  // namespace gd

Core/GDCore/IDE/Events/EventsContextAnalyzer.h

@@ -0,0 +1,99 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#ifndef EventsContextAnalyzer_H
+#define EventsContextAnalyzer_H
+#include <map>
+#include <memory>
+#include <set>
+#include <vector>
+#include "GDCore/IDE/Events/ArbitraryEventsWorker.h"
+#include "GDCore/String.h"
+namespace gd {
+class BaseEvent;
+class Platform;
+class Project;
+class Layout;
+class EventsList;
+class ParameterMetadata;
+class Expression;
+}  // namespace gd
+
+namespace gd {
+
+/**
+ * \brief Store the results of a search done by EventsContextAnalyzer.
+ */
+class GD_CORE_API EventsContext {
+ public:
+  EventsContext(gd::Project& project_, gd::Layout& layout_)
+      : project(project_), layout(layout_){};
+  virtual ~EventsContext(){};
+
+  void AddObjectName(const gd::String& objectName);
+
+  std::vector<gd::String> ExpandObjectsName(const gd::String& objectName);
+
+  /**
+   * \brief Get object or group names being referenced in the events.
+   */
+  const std::set<gd::String>& GetObjectOrGroupNames() {
+    return objectOrGroupNames;
+  }
+
+  /**
+   * \brief Get objects referenced in the events, without groups (all groups
+   * have been "expanded" to the real objects being referenced by the group).
+   */
+  const std::set<gd::String>& GetObjectNames() { return objectNames; }
+
+ private:
+  std::set<gd::String> objectOrGroupNames;
+  std::set<gd::String> objectNames;
+  gd::Project& project;
+  gd::Layout& layout;
+};
+
+/**
+ * \brief Analyze events to list all the objects being used in them.
+ *
+ * \ingroup IDE
+ */
+class GD_CORE_API EventsContextAnalyzer : public ArbitraryEventsWorker {
+ public:
+  EventsContextAnalyzer(const gd::Platform& platform_,
+                        gd::Project& project_,
+                        gd::Layout& layout_)
+      : platform(platform_),
+        project(project_),
+        layout(layout_),
+        context(project, layout){};
+  virtual ~EventsContextAnalyzer(){};
+
+  /**
+   * Get the context containing the objects that are used in the events.
+   */
+  const EventsContext& GetEventsContext() { return context; }
+
+  static void AnalyzeParameter(const gd::Platform& platform,
+                               const gd::Project& project,
+                               const gd::Layout& layout,
+                               const gd::ParameterMetadata& metadata,
+                               const gd::Expression& parameter,
+                               EventsContext& context);
+
+ private:
+  virtual bool DoVisitInstruction(gd::Instruction& instruction,
+                                  bool isCondition);
+
+  const gd::Platform& platform;
+  gd::Project& project;
+  gd::Layout& layout;
+  EventsContext context;
+};
+
+}  // namespace gd
+
+#endif  // EventsContextAnalyzer_H

Core/GDCore/IDE/Events/EventsRefactorer.cpp

@@ -217,7 +217,7 @@ bool EventsRefactorer::RenameObjectInActions(const gd::Platform& platform,
           actions[aId].GetParameter(pNb).GetPlainString() == oldName)
         actions[aId].SetParameter(pNb, gd::Expression(newName));
       // Replace object's name in expressions
-      else if (instrInfos.parameters[pNb].type == "expression") {
+      else if (ParameterMetadata::IsExpression("number", instrInfos.parameters[pNb].type)) {
         gd::String newExpression;
         gd::String oldExpression =
             actions[aId].GetParameter(pNb).GetPlainString();
@@ -232,11 +232,7 @@ bool EventsRefactorer::RenameObjectInActions(const gd::Platform& platform,
         }
       }
       // Replace object's name in text expressions
-      else if (instrInfos.parameters[pNb].type == "string" ||
-               instrInfos.parameters[pNb].type == "file" ||
-               instrInfos.parameters[pNb].type == "joyaxis" ||
-               instrInfos.parameters[pNb].type == "color" ||
-               instrInfos.parameters[pNb].type == "layer") {
+      else if (ParameterMetadata::IsExpression("string", instrInfos.parameters[pNb].type)) {
         gd::String newExpression;
         gd::String oldExpression =
             actions[aId].GetParameter(pNb).GetPlainString();
@@ -285,7 +281,7 @@ bool EventsRefactorer::RenameObjectInConditions(
           conditions[cId].GetParameter(pNb).GetPlainString() == oldName)
         conditions[cId].SetParameter(pNb, gd::Expression(newName));
       // Replace object's name in expressions
-      else if (instrInfos.parameters[pNb].type == "expression") {
+      else if (ParameterMetadata::IsExpression("number", instrInfos.parameters[pNb].type)) {
         gd::String newExpression;
         gd::String oldExpression =
             conditions[cId].GetParameter(pNb).GetPlainString();
@@ -299,11 +295,7 @@ bool EventsRefactorer::RenameObjectInConditions(
         }
       }
       // Replace object's name in text expressions
-      else if (instrInfos.parameters[pNb].type == "string" ||
-               instrInfos.parameters[pNb].type == "file" ||
-               instrInfos.parameters[pNb].type == "joyaxis" ||
-               instrInfos.parameters[pNb].type == "color" ||
-               instrInfos.parameters[pNb].type == "layer") {
+      else if (ParameterMetadata::IsExpression("string", instrInfos.parameters[pNb].type)) {
         gd::String newExpression;
         gd::String oldExpression =
             conditions[cId].GetParameter(pNb).GetPlainString();
@@ -389,7 +381,7 @@ bool EventsRefactorer::RemoveObjectInActions(const gd::Platform& platform,
         break;
       }
       // Replace object's name in expressions
-      else if (instrInfos.parameters[pNb].type == "expression") {
+      else if (ParameterMetadata::IsExpression("number", instrInfos.parameters[pNb].type)) {
         CallbacksForRemovingObject callbacks(name);
 
         gd::ExpressionParser parser(
@@ -401,11 +393,7 @@ bool EventsRefactorer::RemoveObjectInActions(const gd::Platform& platform,
         }
       }
       // Replace object's name in text expressions
-      else if (instrInfos.parameters[pNb].type == "string" ||
-               instrInfos.parameters[pNb].type == "file" ||
-               instrInfos.parameters[pNb].type == "joyaxis" ||
-               instrInfos.parameters[pNb].type == "color" ||
-               instrInfos.parameters[pNb].type == "layer") {
+      else if (ParameterMetadata::IsExpression("string", instrInfos.parameters[pNb].type)) {
         CallbacksForRemovingObject callbacks(name);
 
         gd::ExpressionParser parser(
@@ -457,7 +445,7 @@ bool EventsRefactorer::RemoveObjectInConditions(
         break;
       }
       // Replace object's name in expressions
-      else if (instrInfos.parameters[pNb].type == "expression") {
+      else if (ParameterMetadata::IsExpression("number", instrInfos.parameters[pNb].type)) {
         CallbacksForRemovingObject callbacks(name);
 
         gd::ExpressionParser parser(
@@ -469,11 +457,7 @@ bool EventsRefactorer::RemoveObjectInConditions(
         }
       }
       // Replace object's name in text expressions
-      else if (instrInfos.parameters[pNb].type == "string" ||
-               instrInfos.parameters[pNb].type == "file" ||
-               instrInfos.parameters[pNb].type == "joyaxis" ||
-               instrInfos.parameters[pNb].type == "color" ||
-               instrInfos.parameters[pNb].type == "layer") {
+      else if (ParameterMetadata::IsExpression("string", instrInfos.parameters[pNb].type)) {
         CallbacksForRemovingObject callbacks(name);
 
         gd::ExpressionParser parser(

Core/GDCore/IDE/Events/EventsRefactorer.h

@@ -11,26 +11,12 @@
 #include "GDCore/String.h"
 namespace gd {
 class EventsList;
-}
-namespace gd {
 class Layout;
-}
-namespace gd {
 class Platform;
-}
-namespace gd {
 class Project;
-}
-namespace gd {
 class ExternalEvents;
-}
-namespace gd {
 class BaseEvent;
-}
-namespace gd {
 class Instruction;
-}
-namespace gd {
 typedef std::shared_ptr<gd::BaseEvent> BaseEventSPtr;
 }
 
@@ -53,6 +39,24 @@ class GD_CORE_API EventsSearchResult {
   std::weak_ptr<gd::BaseEvent> event;
   gd::EventsList* eventsList;
   std::size_t positionInList;
+
+  bool IsEventsListValid() const { return eventsList != nullptr; }
+  
+  /**
+   * \brief Get the events list containing the event pointed by the EventsSearchResult.
+   * \warning Only call this when IsEventsListValid returns true.
+   */
+  const gd::EventsList & GetEventsList() const { return *eventsList; }
+
+  std::size_t GetPositionInList() const { return positionInList; }
+  
+  bool IsEventValid() const { return !event.expired(); }
+
+  /**
+   * \brief Get the event pointed by the EventsSearchResult.
+   * \warning Only call this when IsEventValid returns true.
+   */
+  const gd::BaseEvent & GetEvent() const { return *event.lock(); }
 };
 
 /**

Core/GDCore/IDE/Events/EventsTypesLister.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 "GDCore/IDE/Events/EventsTypesLister.h"
+#include <iostream>
+#include <map>
+#include <memory>
+#include <vector>
+#include "GDCore/Events/Event.h"
+#include "GDCore/Events/EventsList.h"
+#include "GDCore/Project/Layout.h"
+#include "GDCore/Project/Project.h"
+#include "GDCore/String.h"
+
+namespace gd {
+
+bool EventsTypesLister::DoVisitEvent(gd::BaseEvent& event) {
+  allEventsTypes.push_back(event.GetType());
+
+  return false;
+}
+
+bool EventsTypesLister::DoVisitInstruction(gd::Instruction& instruction,
+                                           bool isCondition) {
+  if (isCondition)
+    allConditionsTypes.push_back(instruction.GetType());
+  else
+    allActionsTypes.push_back(instruction.GetType());
+
+  return false;
+}
+
+EventsTypesLister::~EventsTypesLister() {}
+
+}  // namespace gd

Core/GDCore/IDE/Events/EventsTypesLister.h

@@ -0,0 +1,64 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#ifndef EventsTypesLister_H
+#define EventsTypesLister_H
+#include <iostream>
+#include <map>
+#include <memory>
+#include <vector>
+#include "GDCore/IDE/Events/ArbitraryEventsWorker.h"
+#include "GDCore/String.h"
+namespace gd {
+class BaseEvent;
+class Project;
+class EventsList;
+}  // namespace gd
+
+namespace gd {
+
+/**
+ * \brief List the values of the parameters of events and their type.
+ *
+ * \ingroup IDE
+ */
+class GD_CORE_API EventsTypesLister : public ArbitraryEventsWorker {
+ public:
+  EventsTypesLister(const gd::Project& project_) : project(project_){};
+  virtual ~EventsTypesLister();
+
+  /**
+   * Return the types of all events
+   */
+  const std::vector<gd::String>& GetAllEventsTypes() { return allEventsTypes; }
+
+  /**
+   * Return the types of all conditions
+   */
+  const std::vector<gd::String>& GetAllConditionsTypes() {
+    return allConditionsTypes;
+  }
+
+  /**
+   * Return the types of all actions
+   */
+  const std::vector<gd::String>& GetAllActionsTypes() {
+    return allActionsTypes;
+  }
+
+ private:
+  bool DoVisitEvent(gd::BaseEvent& event) override;
+  bool DoVisitInstruction(gd::Instruction& instruction,
+                          bool isCondition) override;
+
+  std::vector<gd::String> allEventsTypes;
+  std::vector<gd::String> allConditionsTypes;
+  std::vector<gd::String> allActionsTypes;
+  const gd::Project& project;
+};
+
+}  // namespace gd
+
+#endif  // EventsTypesLister_H

Core/GDCore/IDE/Events/EventsVariablesFinder.cpp

@@ -174,7 +174,7 @@ std::set<gd::String> EventsVariablesFinder::FindArgumentsInInstructions(
           results.insert(instructions[aId].GetParameter(pNb).GetPlainString());
       }
       // Search in expressions
-      else if (instrInfos.parameters[pNb].type == "expression") {
+      else if (ParameterMetadata::IsExpression("number", instrInfos.parameters[pNb].type)) {
         CallbacksForSearchingVariable callbacks(
             results, parameterType, objectName);
 
@@ -183,11 +183,7 @@ std::set<gd::String> EventsVariablesFinder::FindArgumentsInInstructions(
         parser.ParseMathExpression(platform, project, layout, callbacks);
       }
       // Search in gd::String expressions
-      else if (instrInfos.parameters[pNb].type == "string" ||
-               instrInfos.parameters[pNb].type == "file" ||
-               instrInfos.parameters[pNb].type == "joyaxis" ||
-               instrInfos.parameters[pNb].type == "color" ||
-               instrInfos.parameters[pNb].type == "layer") {
+      else if (ParameterMetadata::IsExpression("string", instrInfos.parameters[pNb].type)) {
         CallbacksForSearchingVariable callbacks(
             results, parameterType, objectName);
 

Core/GDCore/IDE/ExtensionsLoader.h

@@ -17,8 +17,13 @@ namespace gd {
 /**
  * \brief Internal class loading static extensions.
  *
- * Class that load extensions and store them in ExtensionsManager
- * \see ExtensionsManager
+ * Class that load extensions and store them in a Platform.
+ * 
+ * \note This is for loading extensions declared in C++, usually in
+ * files called "Extension.cpp" or "JsExtension.cpp".
+ * GDevelop 5 extensions can also be declared directly in JavaScript. 
+ * See newIDE/app/src/JsExtensionsLoader and "JsExtension.js" files
+ * for extensions declared in JavaScript.
  */
 class GD_CORE_API ExtensionsLoader {
  public:

Core/GDCore/IDE/wxTools/FileProperty.h

@@ -6,7 +6,7 @@
 #if defined(GD_IDE_ONLY) && !defined(GD_NO_WX_GUI)
 #ifndef GDCORE_FILEPROPERTY_H
 #define GDCORE_FILEPROPERTY_H
-#include <wx/control.h>
+#include <wx/bitmap.h>
 #include <wx/propgrid/propgrid.h>
 #include <wx/propgrid/props.h>
 

Core/GDCore/Project/InitialInstance.cpp

@@ -145,6 +145,16 @@ const gd::String& InitialInstance::GetRawStringProperty(
   const auto& it = stringInfos.find(name);
   return it != stringInfos.end() ? it->second : *badStringProperyValue;
 }
+
+void InitialInstance::SetRawFloatProperty(const gd::String& name, float value)
+{
+  floatInfos[name] = value;
+}
+
+void InitialInstance::SetRawStringProperty(const gd::String& name, const gd::String& value)
+{
+  stringInfos[name] = value;
+}
 #endif
 
 }  // namespace gd

Core/GDCore/Project/InitialInstance.h

@@ -206,7 +206,8 @@ class GD_CORE_API InitialInstance {
   /**
    * \brief Get the value of a float property stored in the instance.
    * \note Only use this when \a GetCustomProperties is too slow (when rendering
-   * instances for example). \return the value of the property, or 0 if it does
+   * instances for example). 
+   * \return the value of the property, or 0 if it does
    * not exists.
    */
   float GetRawFloatProperty(const gd::String& name) const;
@@ -214,10 +215,21 @@ class GD_CORE_API InitialInstance {
   /**
    * \brief Get the value of a string property stored in the instance.
    * \note Only use this when \a GetCustomProperties is too slow (when rendering
-   * instances for example). \return the value of the propety, or an empty
+   * instances for example). 
+   * \return the value of the propety, or an empty
    * string if it does not exists.
    */
   const gd::String& GetRawStringProperty(const gd::String& name) const;
+
+  /**
+   * \brief Set the value of a float property stored in the instance.
+   */
+  void SetRawFloatProperty(const gd::String& name, float value);
+
+  /**
+   * \brief Set the value of a string property stored in the instance.
+   */
+  void SetRawStringProperty(const gd::String& name, const gd::String& value);
 ///@}
 #endif
 

Core/GDCore/Project/LayoutEditorPreviewer.h

@@ -1,6 +1,12 @@
 #ifndef LAYOUTEDITORPREVIEWER_H
 #define LAYOUTEDITORPREVIEWER_H
+
 #if defined(GD_IDE_ONLY) && !defined(GD_NO_WX_GUI)
+
+#ifdef WINDOWS
+    #include <wx/msw/winundef.h>
+#endif
+
 #include <wx/event.h>
 namespace gd {
 class LayoutEditorCanvas;

Core/GDCore/Project/Project.cpp

@@ -61,6 +61,7 @@ Project::Project()
     :
 #if defined(GD_IDE_ONLY)
       name(_("Project")),
+      version("1.0.0"),
       packageName("com.example.gamename"),
       orientation("landscape"),
       folderProject(false),
@@ -524,6 +525,7 @@ void Project::UnserializeFrom(const SerializerElement& element) {
   const SerializerElement& propElement =
       element.GetChild("properties", 0, "Info");
   SetName(propElement.GetChild("name", 0, "Nom").GetValue().GetString());
+  SetVersion(propElement.GetStringAttribute("version", "1.0.0"));
   SetDefaultWidth(
       propElement.GetChild("windowWidth", 0, "WindowW").GetValue().GetInt());
   SetDefaultHeight(
@@ -782,6 +784,7 @@ void Project::SerializeTo(SerializerElement& element) const {
 
   SerializerElement& propElement = element.AddChild("properties");
   propElement.AddChild("name").SetValue(GetName());
+  propElement.SetAttribute("version", GetVersion());
   propElement.AddChild("author").SetValue(GetAuthor());
   propElement.AddChild("windowWidth").SetValue(GetMainWindowDefaultWidth());
   propElement.AddChild("windowHeight").SetValue(GetMainWindowDefaultHeight());
@@ -1100,6 +1103,7 @@ Project& Project::operator=(const Project& other) {
 void Project::Init(const gd::Project& game) {
   // Some properties
   name = game.name;
+  version = game.version;
   windowWidth = game.windowWidth;
   windowHeight = game.windowHeight;
   maxFPS = game.maxFPS;

Core/GDCore/Project/Project.h

@@ -21,44 +21,18 @@ class TiXmlElement;
 #include "GDCore/Project/VariablesContainer.h"
 namespace gd {
 class Platform;
-}
-namespace gd {
 class Layout;
-}
-namespace gd {
 class ExternalEvents;
-}
-namespace gd {
 class ResourcesManager;
-}
-namespace gd {
 class ExternalLayout;
-}
-namespace gd {
 class Object;
-}
-namespace gd {
 class VariablesContainer;
-}
-namespace gd {
 class ArbitraryResourceWorker;
-}
-namespace gd {
 class SourceFile;
-}
-namespace gd {
 class ImageManager;
-}
-namespace gd {
 class Behavior;
-}
-namespace gd {
 class BehaviorsSharedData;
-}
-namespace gd {
 class BaseEvent;
-}
-namespace gd {
 class SerializerElement;
 }
 #undef GetObject  // Disable an annoying macro
@@ -92,6 +66,17 @@ class GD_CORE_API Project : public ClassWithObjects {
    */
   const gd::String& GetName() const { return name; }
 
+  /**
+   * \brief Change the version of the project.
+   * This can be freely set, but should follow "X.Y.Z" format for compatibility with some exporters.
+   */
+  void SetVersion(const gd::String& version_) { version = version_; };
+
+  /**
+   * \brief Get project version.
+   */
+  const gd::String& GetVersion() const { return version; }
+
 #if defined(GD_IDE_ONLY)
   /**
    * \brief Change the author of the project.
@@ -222,13 +207,16 @@ class GD_CORE_API Project : public ClassWithObjects {
   /**
    * \brief Get how the game size should be adapted to the screen.
    */
-  const gd::String & GetSizeOnStartupMode() const { return sizeOnStartupMode; }
-  
+  const gd::String& GetSizeOnStartupMode() const { return sizeOnStartupMode; }
+
   /**
-   * \brief Set how to adapt the game size to the screen. 
-   * \param mode The size to be used. Can be "adaptWidth", "adaptHeight" or empty fpr no changes to game size.
+   * \brief Set how to adapt the game size to the screen.
+   * \param mode The size to be used. Can be "adaptWidth", "adaptHeight" or
+   * empty fpr no changes to game size.
    */
-  void SetSizeOnStartupMode(const gd::String & mode) { sizeOnStartupMode = mode; }
+  void SetSizeOnStartupMode(const gd::String& mode) {
+    sizeOnStartupMode = mode;
+  }
 
   /**
    * Change the default maximum number of frames allowed to be rendered per
@@ -874,13 +862,16 @@ class GD_CORE_API Project : public ClassWithObjects {
   void LoadProjectInformationFromXml(const TiXmlElement* elem);
 
   gd::String name;            ///< Game name
+  gd::String version;         ///< Game version number (used for some exports)
   unsigned int windowWidth;   ///< Window default width
   unsigned int windowHeight;  ///< Window default height
   int maxFPS;                 ///< Maximum Frame Per Seconds, -1 for unlimited
   unsigned int minFPS;  ///< Minimum Frame Per Seconds ( slow down game if FPS
                         ///< are below this number )
   bool verticalSync;    ///< If true, must activate vertical synchronization.
-  gd::String sizeOnStartupMode; ///< How to adapt the game size to the screen. Can be "adaptWidth", "adaptHeight" or empty
+  gd::String
+      sizeOnStartupMode;  ///< How to adapt the game size to the screen. Can be
+                          ///< "adaptWidth", "adaptHeight" or empty
   std::vector<std::unique_ptr<gd::Layout> > scenes;  ///< List of all scenes
   gd::VariablesContainer variables;  ///< Initial global variables
   std::vector<std::unique_ptr<gd::ExternalLayout> >

Core/GDCore/Serialization/SerializerElement.cpp

@@ -8,6 +8,9 @@ SerializerElement SerializerElement::nullElement;
 
 SerializerElement::SerializerElement() : valueUndefined(true) {}
 
+SerializerElement::SerializerElement(const SerializerValue& value)
+    : valueUndefined(false), elementValue(value) {}
+
 SerializerElement::~SerializerElement() {}
 
 const SerializerValue& SerializerElement::GetValue() const {

Core/GDCore/Serialization/SerializerElement.h

@@ -23,6 +23,7 @@ namespace gd {
 class GD_CORE_API SerializerElement {
  public:
   SerializerElement();
+  SerializerElement(const SerializerValue & value);
   virtual ~SerializerElement();
 
   /** \name Value

Core/GDCore/Tools/SystemStats.cpp

@@ -8,8 +8,8 @@
 #include "stdlib.h"
 #include "string.h"
 #if defined(WINDOWS)
-#include "psapi.h"
 #include "windows.h"
+#include "psapi.h"
 #endif
 
 namespace gd {

Core/docs/doxyfile

@@ -1699,7 +1699,7 @@ HIDE_UNDOC_RELATIONS   = YES
 # toolkit from AT&T and Lucent Bell Labs. The other options in this section
 # have no effect if this option is set to NO (the default)
 
-HAVE_DOT               = YES
+HAVE_DOT               = NO
 
 # The DOT_NUM_THREADS specifies the number of dot invocations doxygen is
 # allowed to run in parallel. When set to 0 (the default) doxygen will

Extensions/AdMobObject/Extension.cpp

@@ -11,12 +11,14 @@ This project is released under the MIT License.
 #include "AdMobObject.h"
 
 void DeclareAdMobObjectExtension(gd::PlatformExtension& extension) {
-  extension.SetExtensionInformation(
-      "AdMobObject",
-      _("AdMob banners and interstitial screens"),
-      _("Display an ads banner and interstitial screens powered by AdMob."),
-      "Florian Rival",
-      "Open source (MIT License)");
+  extension
+      .SetExtensionInformation(
+          "AdMobObject",
+          _("AdMob banners and interstitial screens"),
+          _("Display an ads banner and interstitial screens powered by AdMob."),
+          "Florian Rival",
+          "Open source (MIT License)")
+      .SetExtensionHelpPath("/objects/admob");
 
   gd::ObjectMetadata& obj = extension.AddObject<AdMobObject>(
       "AdMob",

Extensions/AdMobObject/admobruntimeobject.js

@@ -12,10 +12,10 @@ if (typeof AdMob !== "undefined")
  * The AdMobRuntimeObject displays an AdMob ad banner on screen.
  * This works with Cordova compatible platforms with `cordova-plugin-admobpro` plugin installed.
  *
- * @namespace gdjs
+ * @memberof gdjs
  * @class AdMobRuntimeObject
  * @extends RuntimeObject
- * @namespace gdjs
+ * @memberof gdjs
  */
 gdjs.AdMobRuntimeObject = function(runtimeScene, objectData)
 {

Extensions/AnchorBehavior/Extension.cpp

@@ -10,11 +10,13 @@ This project is released under the MIT License.
 #include "GDCpp/Runtime/Project/BehaviorsSharedData.h"
 
 void DeclareAnchorBehaviorExtension(gd::PlatformExtension& extension) {
-  extension.SetExtensionInformation("AnchorBehavior",
-                                    _("Anchor"),
-                                    _("Anchor objects to the window's bounds."),
-                                    "Victor Levasseur",
-                                    "Open source (MIT License)");
+  extension
+      .SetExtensionInformation("AnchorBehavior",
+                               _("Anchor"),
+                               _("Anchor objects to the window's bounds."),
+                               "Victor Levasseur",
+                               "Open source (MIT License)")
+      .SetExtensionHelpPath("/behaviors/anchor");
 
   gd::BehaviorMetadata& aut = extension.AddBehavior(
       "AnchorBehavior",

Extensions/Box3DObject/Extension.cpp

@@ -26,7 +26,8 @@ class Extension : public ExtensionBase {
         _("3D Box Object"),
         _("This Extension enables the use of 3D Box objects."),
         "Florian Rival",
-        "Open source (MIT License)");
+        "Open source (MIT License)")
+        .SetExtensionHelpPath("" /*TODO: Add a documentation page for this */);
 
     {
       gd::ObjectMetadata& obj =

Extensions/CMakeLists.txt

@@ -20,7 +20,7 @@ IF (NOT EMSCRIPTEN)
 ENDIF()
 ADD_SUBDIRECTORY(DestroyOutsideBehavior)
 ADD_SUBDIRECTORY(DraggableBehavior)
-ADD_SUBDIRECTORY(FacebookInstantGames)
+# ADD_SUBDIRECTORY(FacebookInstantGames) - Pure JS extension, see "JsExtension.js".
 IF (NOT EMSCRIPTEN)
 	ADD_SUBDIRECTORY(Function)
 ENDIF()

Extensions/CommonDialogs/Extension.cpp

@@ -7,96 +7,108 @@ This project is released under the MIT License.
 
 #include "GDCpp/Extensions/ExtensionBase.h"
 
-
-
 /**
  * \brief This class declares information about the extension.
  */
-class Extension : public ExtensionBase
-{
-public:
+class Extension : public ExtensionBase {
+ public:
+  /**
+   * Constructor of an extension declares everything the extension contains:
+   * objects, actions, conditions and expressions.
+   */
+  Extension() {
+    SetExtensionInformation("CommonDialogs",
+                            _("Common dialogs"),
+                            _("This Extension can display common dialogs ( "
+                              "Message box, open file dialog... )"),
+                            "Florian Rival",
+                            "Open source (MIT License)")
+        .SetExtensionHelpPath("" /*TODO: Add a documentation page for this */);
+#if defined(GD_IDE_ONLY)
 
-    /**
-     * Constructor of an extension declares everything the extension contains: objects, actions, conditions and expressions.
-     */
-    Extension()
-    {
-        SetExtensionInformation("CommonDialogs",
-                              _("Common dialogs"),
-                              _("This Extension can display common dialogs ( Message box, open file dialog... )"),
-                              "Florian Rival",
-                              "Open source (MIT License)");
-        #if defined(GD_IDE_ONLY)
+    AddAction(
+        "ShowMsgBox",
+        _("Show a message box"),
+        _("Display a message box with the specified text and an Ok button."),
+        _("Display message \"_PARAM1_\" with title \"_PARAM2_\""),
+        _("Interfaces"),
+        "res/actions/msgbox24.png",
+        "res/actions/msgbox.png")
 
-        AddAction("ShowMsgBox",
-                       _("Show a message box"),
-                       _("Display a message box with the specified text and an Ok button."),
-                       _("Display message \"_PARAM1_\" with title \"_PARAM2_\""),
-                       _("Interfaces"),
-                       "res/actions/msgbox24.png",
-                       "res/actions/msgbox.png")
+        .AddCodeOnlyParameter("currentScene", "")
+        .AddParameter("string", _("Message"))
+        .AddParameter("string", _("Title"))
 
-            .AddCodeOnlyParameter("currentScene", "")
-            .AddParameter("string", _("Message"))
-            .AddParameter("string", _("Title"))
+        .SetFunctionName("GDpriv::CommonDialogs::ShowMessageBox")
+        .SetIncludeFile("CommonDialogs/CommonDialogs.h");
 
-            .SetFunctionName("GDpriv::CommonDialogs::ShowMessageBox").SetIncludeFile("CommonDialogs/CommonDialogs.h");
+    AddAction(
+        "ShowOpenFile",
+        _("Show a window to choose a file"),
+        _("Display a window that allows a player to choose a file.\nThe name "
+          "and the directory of the file will be saved in the specified "
+          "variable."),
+        _("Open a window for choosing a file, and save the result in _PARAM1_"),
+        _("Interfaces"),
+        "res/actions/openfile24.png",
+        "res/actions/openfile.png")
 
-        AddAction("ShowOpenFile",
-                       _("Show a window to choose a file"),
-                       _("Display a window that allows a player to choose a file.\nThe name and the directory of the file will be saved in the specified variable."),
-                       _("Open a window for choosing a file, and save the result in _PARAM1_"),
-                       _("Interfaces"),
-                       "res/actions/openfile24.png",
-                       "res/actions/openfile.png")
+        .AddCodeOnlyParameter("currentScene", "")
+        .AddParameter("scenevar", _("Save result to scene variable"))
+        .AddParameter("string", _("Title"))
+        .AddParameter(
+            "string",
+            _("Wildcard filter ( \"FileType|*.ext;*.ext2|2ndFileType|*.ext3\" "
+              ") ( Windows only ) "))
 
-            .AddCodeOnlyParameter("currentScene", "")
-            .AddParameter("scenevar", _("Save result to scene variable"))
-            .AddParameter("string", _("Title"))
-            .AddParameter("string", _("Wildcard filter ( \"FileType|*.ext;*.ext2|2ndFileType|*.ext3\" ) ( Windows only ) "))
+        .SetFunctionName("GDpriv::CommonDialogs::ShowOpenFile")
+        .SetIncludeFile("CommonDialogs/CommonDialogs.h");
 
-            .SetFunctionName("GDpriv::CommonDialogs::ShowOpenFile").SetIncludeFile("CommonDialogs/CommonDialogs.h");
+    AddAction("ShowTextInput",
+              _("Show a window to enter a text"),
+              _("Show a window that allows a player to enter text.\nThe text "
+                "will be saved in the specified scene variable."),
+              _("Open a text input dialog, and save the result in _PARAM1_"),
+              _("Interfaces"),
+              "res/actions/textenter24.png",
+              "res/actions/textenter.png")
 
-        AddAction("ShowTextInput",
-                       _("Show a window to enter a text"),
-                       _("Show a window that allows a player to enter text.\nThe text will be saved in the specified scene variable."),
-                       _("Open a text input dialog, and save the result in _PARAM1_"),
-                       _("Interfaces"),
-                       "res/actions/textenter24.png",
-                       "res/actions/textenter.png")
+        .AddCodeOnlyParameter("currentScene", "")
+        .AddParameter("scenevar", _("Save result to scene variable"))
+        .AddParameter("string", _("Message"))
+        .AddParameter("string", _("Title"))
 
-            .AddCodeOnlyParameter("currentScene", "")
-            .AddParameter("scenevar", _("Save result to scene variable"))
-            .AddParameter("string", _("Message"))
-            .AddParameter("string", _("Title"))
+        .SetFunctionName("GDpriv::CommonDialogs::ShowTextInput")
+        .SetIncludeFile("CommonDialogs/CommonDialogs.h");
 
-            .SetFunctionName("GDpriv::CommonDialogs::ShowTextInput").SetIncludeFile("CommonDialogs/CommonDialogs.h");
+    AddAction(
+        "ShowYesNoMsgBox",
+        _("Display a Yes/No message box"),
+        _("Open a message box that allows a player to choose Yes or No.\nThe "
+          "answer ( \"yes\"/\"no\" ) will be saved in the specified variable."),
+        _("Open a Yes/No message box, and save the result in _PARAM1_"),
+        _("Interfaces"),
+        "res/actions/msgbox24.png",
+        "res/actions/msgbox.png")
 
-        AddAction("ShowYesNoMsgBox",
-                       _("Display a Yes/No message box"),
-                       _("Open a message box that allows a player to choose Yes or No.\nThe answer ( \"yes\"/\"no\" ) will be saved in the specified variable."),
-                       _("Open a Yes/No message box, and save the result in _PARAM1_"),
-                       _("Interfaces"),
-                       "res/actions/msgbox24.png",
-                       "res/actions/msgbox.png")
+        .AddCodeOnlyParameter("currentScene", "")
+        .AddParameter("scenevar", _("Save result to scene variable"))
+        .AddParameter("string", _("Message"))
+        .AddParameter("string", _("Title"))
 
-            .AddCodeOnlyParameter("currentScene", "")
-            .AddParameter("scenevar", _("Save result to scene variable"))
-            .AddParameter("string", _("Message"))
-            .AddParameter("string", _("Title"))
+        .SetFunctionName("GDpriv::CommonDialogs::ShowYesNoMsgBox")
+        .SetIncludeFile("CommonDialogs/CommonDialogs.h");
 
-            .SetFunctionName("GDpriv::CommonDialogs::ShowYesNoMsgBox").SetIncludeFile("CommonDialogs/CommonDialogs.h");
+#endif
 
-        #endif
-
-        GD_COMPLETE_EXTENSION_COMPILATION_INFORMATION();
-    };
+    GD_COMPLETE_EXTENSION_COMPILATION_INFORMATION();
+  };
 };
 
 /**
  * Used by GDevelop to create the extension class
  * -- Do not need to be modified. --
  */
-extern "C" ExtensionBase * GD_EXTENSION_API CreateGDExtension() {
-    return new Extension;
+extern "C" ExtensionBase* GD_EXTENSION_API CreateGDExtension() {
+  return new Extension;
 }

Extensions/DestroyOutsideBehavior/Extension.cpp

@@ -16,7 +16,8 @@ void DeclareDestroyOutsideBehaviorExtension(gd::PlatformExtension& extension) {
       _("This Extension can be used to destroy objects when they go outside of "
         "the borders of the game's window."),
       "Florian Rival",
-      "Open source (MIT License)");
+      "Open source (MIT License)")
+      .SetExtensionHelpPath("/behaviors/destroyoutside");
 
   gd::BehaviorMetadata& aut =
       extension.AddBehavior("DestroyOutside",

Extensions/DestroyOutsideBehavior/JsExtension.cpp

@@ -22,12 +22,6 @@ class DestroyOutsideBehaviorJsExtension : public gd::PlatformExtension {
    * contains: objects, actions, conditions and expressions.
    */
   DestroyOutsideBehaviorJsExtension() {
-    SetExtensionInformation(
-        "DestroyOutsideBehavior",
-        _("Destroy Outside Screen Behavior"),
-        _("Behavior destroying object when they go outside the screen"),
-        "Florian Rival",
-        "Open source (MIT License)");
     DeclareDestroyOutsideBehaviorExtension(*this);
 
     GetBehaviorMetadata("DestroyOutsideBehavior::DestroyOutside")

Extensions/DeviceSensors/JsExtension.js

@@ -0,0 +1,204 @@
+/**
+ * This is a declaration of an extension for GDevelop 5.
+ * 
+ * ℹ️ Run `node import-GDJS-Runtime.js` (in newIDE/app/scripts) if you make any change
+ * to this extension file or to any other *.js file that you reference inside.
+ * 
+ * The file must be named "JsExtension.js", otherwise GDevelop won't load it. 
+ * ⚠️ If you make a change and the extension is not loaded, open the developer console
+ * and search for any errors.
+ * 
+ * More information on https://github.com/4ian/GD/blob/master/newIDE/README-extensions.md
+ */
+module.exports = {
+  createExtension: function(t, gd) {
+    const extension = new gd.PlatformExtension();
+    extension.setExtensionInformation(
+      "DeviceSensors",
+      t("Device sensors"),
+      t(
+        "Allow the game to access the sensors of a mobile device."
+      ),
+      "Matthias Meike",
+      "Open source (MIT License)"
+    ).setExtensionHelpPath("/all-features/device-sensors");
+
+    extension
+      .addCondition(
+        "OrientationSensorActive",
+        t("Sensor active"),
+        t(
+          "The condition is true if the device orientation sensor is currently active"
+        ),
+        t("Orientation sensor is active"),
+        t("Sensors/Orientation"),
+        "JsPlatform/Extensions/orientation_active24.png",
+        "JsPlatform/Extensions/orientation_active32.png"
+      )
+      .getCodeExtraInformation()
+      .setIncludeFile(
+        "Extensions/DeviceSensors/devicesensortools.js"
+      )
+      .setFunctionName("gdjs.evtTools.devicesensors.orientation.isActive");
+
+      extension
+      .addCondition(
+        "OrientationAlpha",
+        t("Compare the value of orientation alpha"),
+        t(
+          "Compare the value of orientation alpha. (Range: 0 to 360°)"
+        ),
+        t("Orientation alpha is _PARAM0__PARAM1_"),
+        t("Sensors/Orientation"),
+        "JsPlatform/Extensions/orientation_alpha24.png",
+        "JsPlatform/Extensions/orientation_alpha32.png"
+      )
+      .addParameter("relationalOperator", t("Sign of the test"))
+      .addParameter("expression", t("Value"))
+      .getCodeExtraInformation()
+      .setIncludeFile(
+        "Extensions/DeviceSensors/devicesensortools.js"
+      )
+      .setFunctionName("gdjs.evtTools.devicesensors.orientation.getOrientationAlpha");
+
+      extension
+      .addCondition(
+        "OrientationBeta",
+        t("Compare the value of orientation beta"),
+        t(
+          "Compare the value of orientation beta. (Range: -180 to 180°)"
+        ),
+        t("Orientation beta is _PARAM0__PARAM1_"),
+        t("Sensors/Orientation"),
+        "JsPlatform/Extensions/orientation_beta24.png",
+        "JsPlatform/Extensions/orientation_beta32.png"
+      )
+      .addParameter("relationalOperator", t("Sign of the test"))
+      .addParameter("expression", t("Value"))
+      .getCodeExtraInformation()
+      .setIncludeFile(
+        "Extensions/DeviceSensors/devicesensortools.js"
+      )
+      .setFunctionName("gdjs.evtTools.devicesensors.orientation.getOrientationBeta");
+
+      extension
+      .addCondition(
+        "OrientationGamma",
+        t("Compare the value of orientation gamma"),
+        t(
+          "Compare the value of orientation gamma. (Range: -90 to 90°)"
+        ),
+        t("Orientation gamma is _PARAM0__PARAM1_"),
+        t("Sensors/Orientation"),
+        "JsPlatform/Extensions/orientation_gamma24.png",
+        "JsPlatform/Extensions/orientation_gamma32.png"
+      )
+      .addParameter("relationalOperator", t("Sign of the test"))
+      .addParameter("expression", t("Value"))
+      .getCodeExtraInformation()
+      .setIncludeFile(
+        "Extensions/DeviceSensors/devicesensortools.js"
+      )
+      .setFunctionName("gdjs.evtTools.devicesensors.orientation.getOrientationGamma");
+
+    extension
+      .addAction(
+        "ActivateOrientationListener",
+        t("Activate orientation sensor"),
+        t("Activate the orientation sensor. (remember to turn it off again)"),
+        t("Activate the orientation sensor."),
+        t("Sensors/Orientation"),
+        "JsPlatform/Extensions/orientation_active24.png",
+        "JsPlatform/Extensions/orientation_active32.png"
+      )
+        .getCodeExtraInformation()
+      .setIncludeFile(
+        "Extensions/DeviceSensors/devicesensortools.js"
+      )
+      .setFunctionName("gdjs.evtTools.devicesensors.orientation.activateOrientationSensor");
+
+    extension
+      .addAction(
+        "DeactivateOrientationListener",
+        t("Deactivate orientation sensor"),
+        t("Deactivate the orientation sensor."),
+        t("Deactivate the orientation sensor."),
+        t("Sensors/Orientation"),
+        "JsPlatform/Extensions/orientation_inactive24.png",
+        "JsPlatform/Extensions/orientation_inactive32.png"
+      )
+        .getCodeExtraInformation()
+      .setIncludeFile(
+        "Extensions/DeviceSensors/devicesensortools.js"
+      )
+      .setFunctionName("gdjs.evtTools.devicesensors.orientation.deactivateOrientationSensor");
+
+    extension
+      .addExpression(
+        "OrientationActive",
+        t("Sensor Active"),
+        t("The expression is true if the device orientation sensor is currently active"),
+        t("Sensors/Orientation")
+      )
+      .getCodeExtraInformation()
+      .setIncludeFile(
+        "Extensions/DeviceSensors/devicesensortools.js"
+      )
+      .setFunctionName("gdjs.evtTools.devicesensors.orientation.isActive");
+
+    extension
+      .addExpression(
+        "OrientationAbsolute",
+        t("Is Absolute"),
+        t("Get if the devices orientation is absolute and not relative"),
+        t("Sensors/Orientation")
+      )
+      .getCodeExtraInformation()
+      .setIncludeFile(
+        "Extensions/DeviceSensors/devicesensortools.js"
+      )
+      .setFunctionName("gdjs.evtTools.devicesensors.orientation.getOrientationAbsolute");
+
+    extension
+      .addExpression(
+        "OrientationAlpha",
+        t("Alpha value"),
+        t("Get the devices orientation Alpha (compass)"),
+        t("Sensors/Orientation")
+      )
+      .getCodeExtraInformation()
+      .setIncludeFile(
+        "Extensions/DeviceSensors/devicesensortools.js"
+      )
+      .setFunctionName("gdjs.evtTools.devicesensors.orientation.getOrientationAlpha");
+
+    extension
+      .addExpression(
+        "OrientationBeta",
+        t("Beta value"),
+        t("Get the devices orientation Beta"),
+        t("Sensors/Orientation")
+      )
+      .getCodeExtraInformation()
+      .setIncludeFile(
+        "Extensions/DeviceSensors/devicesensortools.js"
+      )
+      .setFunctionName("gdjs.evtTools.devicesensors.orientation.getOrientationBeta");
+
+    extension
+      .addExpression(
+        "OrientationGamma",
+        t("Gamma value"),
+        t("Get the devices orientation Gamma value"),
+        t("Sensors/Orientation")
+      )
+      .getCodeExtraInformation()
+      .setIncludeFile(
+        "Extensions/DeviceSensors/devicesensortools.js"
+      )
+      .setFunctionName("gdjs.evtTools.devicesensors.orientation.getOrientationGamma");
+
+    return extension;
+  },
+  runExtensionSanityTests: function(gd, extension) { return []; },
+};

Extensions/DeviceSensors/devicesensortools.js

@@ -0,0 +1,87 @@
+/**
+ * @memberof gdjs.evtTools
+ * @class devicesensors
+ * @static
+ * @private
+ */
+
+gdjs.evtTools.devicesensors = {
+  orientation: {
+    _isActive: 0,
+    _absolute: 0,
+    _alpha: 0,
+    _beta: 0,
+    _gamma: 0
+  }
+};
+
+gdjs.evtTools.devicesensors.orientation._activateOrientationListener = function() {
+  window.addEventListener("deviceorientation", gdjs.evtTools.devicesensors.orientation._handleOrientation, true);
+  gdjs.evtTools.devicesensors.orientation._isActive = 1;
+}
+
+gdjs.evtTools.devicesensors.orientation._deactivateOrientationListener = function() {
+  window.removeEventListener('deviceorientation', gdjs.evtTools.devicesensors.orientation._handleOrientation, true);
+  gdjs.evtTools.devicesensors.orientation._isActive = 0;
+}
+
+gdjs.evtTools.devicesensors.orientation._handleOrientation = function(event) {
+  gdjs.evtTools.devicesensors.orientation._absolute = event.absolute ? Math.round(event.absolute) : 0;
+  gdjs.evtTools.devicesensors.orientation._alpha = event.alpha ? Math.round(event.alpha) : 0;
+  gdjs.evtTools.devicesensors.orientation._beta = event.beta ? Math.round(event.beta) : 0;
+  gdjs.evtTools.devicesensors.orientation._gamma = event.gamma ? Math.round(event.gamma) : 0;
+}
+
+/**
+ * Activate the orientation sensor
+ */
+gdjs.evtTools.devicesensors.orientation.activateOrientationSensor = function() {
+  gdjs.evtTools.devicesensors.orientation._activateOrientationListener();
+}
+
+/**
+ * Deactivate the orientation sensor
+ */
+gdjs.evtTools.devicesensors.orientation.deactivateOrientationSensor = function() {
+  gdjs.evtTools.devicesensors.orientation._deactivateOrientationListener();
+}
+
+/**
+ * Check if the orientation sensor is currently active
+ * @return {number} The activation state of the orientation sensor (0=false/1=true)
+ */
+gdjs.evtTools.devicesensors.orientation.isActive = function() {
+  return gdjs.evtTools.devicesensors.orientation._isActive;
+}
+
+/**
+ * Get the value of the device orientations absolute as a number
+ * @return {number} The device orientation's absolute value
+ */
+gdjs.evtTools.devicesensors.orientation.getOrientationAbsolute = function() {
+  return gdjs.evtTools.devicesensors.orientation._absolute;
+};
+
+/**
+ * Get the value of the device orientations alpha as a number
+ * @return {number} The device orientation's alpha value
+ */
+gdjs.evtTools.devicesensors.orientation.getOrientationAlpha = function() {
+  return gdjs.evtTools.devicesensors.orientation._alpha;
+};
+
+/**
+ * Get the value of the device orientations beta as a number
+ * @return {number} The device orientation's beta value
+ */
+gdjs.evtTools.devicesensors.orientation.getOrientationBeta = function() {
+  return gdjs.evtTools.devicesensors.orientation._beta;
+};
+
+/**
+ * Get the value of the device orientations gamma as a number
+ * @return {number} The device orientation's gamma value
+ */
+gdjs.evtTools.devicesensors.orientation.getOrientationGamma = function() {
+  return gdjs.evtTools.devicesensors.orientation._gamma;
+};

Extensions/DraggableBehavior/Extension.cpp

@@ -15,7 +15,8 @@ void DeclareDraggableBehaviorExtension(gd::PlatformExtension& extension) {
       _("Draggable Behavior"),
       _("This Extension enables the movement of objects with a mouse."),
       "Florian Rival",
-      "Open source (MIT License)");
+      "Open source (MIT License)")
+      .SetExtensionHelpPath("behaviors/draggable");
 
   gd::BehaviorMetadata& aut =
       extension.AddBehavior("Draggable",

Extensions/ExampleJsExtension/JsExtension.js

@@ -0,0 +1,355 @@
+/**
+ * This is a declaration of an extension for GDevelop 5.
+ *
+ * ℹ️ Run `node import-GDJS-Runtime.js` (in newIDE/app/scripts) if you make any change
+ * to this extension file or to any other *.js file that you reference inside.
+ *
+ * The file must be named "JsExtension.js", otherwise GDevelop won't load it.
+ * ⚠️ If you make a change and the extension is not loaded, open the developer console
+ * and search for any errors.
+ *
+ * More information on https://github.com/4ian/GD/blob/master/newIDE/README-extensions.md
+ */
+module.exports = {
+  createExtension: function(t, gd) {
+    const extension = new gd.PlatformExtension();
+    extension.setExtensionInformation(
+      "MyDummyExtension",
+      "My Dummy Extension",
+      "An example of a declaration of an extension",
+      "Florian Rival",
+      "MIT"
+    );
+
+    // Declare conditions, actions or expressions:
+    extension
+      .addCondition(
+        "MyNewCondition",
+        t("Dummy condition example"),
+        t(
+          "This is an example of a condition displayed in the events sheet. Will return true if the number is less than 10 and the length of the text is less than 5."
+        ),
+        t("Call the example condition with _PARAM0_ and _PARAM1_"),
+        t("Dummy Extension"),
+        "res/conditions/camera24.png",
+        "res/conditions/camera.png"
+      )
+      .addParameter("expression", t("Number 1"), "", false)
+      .addParameter("string", t("Text 1"), "", false)
+      .getCodeExtraInformation()
+      .setIncludeFile(
+        "Extensions/ExampleJsExtension/examplejsextensiontools.js"
+      )
+      .setFunctionName("gdjs.evtTools.exampleJsExtension.myConditionFunction");
+
+    extension
+      .addExpression(
+        "DummyExpression",
+        t("Dummy expression example"),
+        t("This is an example of an expression"),
+        t("Dummy Extension"),
+        "res/actions/camera.png"
+      )
+      .addParameter("expression", t("Maximum"), "", false)
+      .getCodeExtraInformation()
+      .setFunctionName("gdjs.random");
+
+    extension
+      .addStrExpression(
+        "DummyStrExpression",
+        t("Dummy string expression example"),
+        t("This is an example of an expression returning a string"),
+        t("Dummy Extension"),
+        "res/actions/camera.png"
+      )
+      .getCodeExtraInformation()
+      .setIncludeFile(
+        "Extensions/ExampleJsExtension/examplejsextensiontools.js"
+      )
+      .setFunctionName("gdjs.evtTools.exampleJsExtension.getString");
+
+    // Declare a behavior.
+    // Create a new gd.BehaviorJsImplementation object and implement the methods
+    // that are called to get and set the properties of the behavior.
+    // Everything that is stored inside the behavior is in "behaviorContent" and is automatically
+    // saved/loaded to JSON.
+    var dummyBehavior = new gd.BehaviorJsImplementation();
+    dummyBehavior.updateProperty = function(
+      behaviorContent,
+      propertyName,
+      newValue
+    ) {
+      if (propertyName === "My first property") {
+        behaviorContent.property1 = newValue;
+        return true;
+      }
+      if (propertyName === "My other property") {
+        behaviorContent.property2 = newValue === "1";
+        return true;
+      }
+
+      return false;
+    };
+    dummyBehavior.getProperties = function(behaviorContent) {
+      var behaviorProperties = new gd.MapStringPropertyDescriptor();
+
+      behaviorProperties.set(
+        "My first property",
+        new gd.PropertyDescriptor(behaviorContent.property1)
+      );
+      behaviorProperties.set(
+        "My other property",
+        new gd.PropertyDescriptor(
+          behaviorContent.property2 ? "true" : "false"
+        ).setType("Boolean")
+      );
+
+      return behaviorProperties;
+    };
+    dummyBehavior.setRawJSONContent(
+      JSON.stringify({
+        property1: "Initial value 1",
+        property2: true
+      })
+    );
+    extension
+      .addBehavior(
+        "DummyBehavior",
+        t("Dummy behavior for testing"),
+        "DummyBehavior",
+        t("This dummy behavior does nothing"),
+        "",
+        "CppPlatform/Extensions/topdownmovementicon.png",
+        "DummyBehavior",
+        dummyBehavior,
+        new gd.BehaviorsSharedData()
+      )
+      .setIncludeFile("Extensions/ExampleJsExtension/dummyruntimebehavior.js")
+      // You can optionally include more than one file when the behavior is used:
+      .addIncludeFile(
+        "Extensions/ExampleJsExtension/examplejsextensiontools.js"
+      );
+
+    // Declare another behavior, with shared data between the behaviors
+    // In addition to the usual behavior:
+    // Create a new gd.BehaviorSharedDataJsImplementation object and implement the methods
+    // that are called to get and set the properties of the shared data.
+    var dummyBehaviorWithSharedData = new gd.BehaviorJsImplementation();
+    dummyBehaviorWithSharedData.updateProperty = function(
+      behaviorContent,
+      propertyName,
+      newValue
+    ) {
+      if (propertyName === "My behavior property") {
+        behaviorContent.property1 = newValue;
+        return true;
+      }
+
+      return false;
+    };
+    dummyBehaviorWithSharedData.getProperties = function(behaviorContent) {
+      var behaviorProperties = new gd.MapStringPropertyDescriptor();
+
+      behaviorProperties.set(
+        "My behavior property",
+        new gd.PropertyDescriptor(behaviorContent.property1)
+      );
+
+      return behaviorProperties;
+    };
+    dummyBehaviorWithSharedData.setRawJSONContent(
+      JSON.stringify({
+        property1: "Initial value 1"
+      })
+    );
+
+    var sharedData = new gd.BehaviorSharedDataJsImplementation();
+    sharedData.updateProperty = function(
+      sharedContent,
+      propertyName,
+      newValue
+    ) {
+      if (propertyName === "My shared property") {
+        sharedContent.sharedProperty1 = newValue;
+        return true;
+      }
+
+      return false;
+    };
+    sharedData.getProperties = function(sharedContent) {
+      var sharedProperties = new gd.MapStringPropertyDescriptor();
+
+      sharedProperties.set(
+        "My shared property",
+        new gd.PropertyDescriptor(sharedContent.sharedProperty1 || "")
+      );
+
+      return sharedProperties;
+    };
+    sharedData.setRawJSONContent(
+      JSON.stringify({
+        sharedProperty1: "Initial shared value 1"
+      })
+    );
+    extension
+      .addBehavior(
+        "DummyBehaviorWithSharedData",
+        t("Dummy behavior with shared data for testing"),
+        "DummyBehaviorWithSharedData",
+        t("This dummy behavior uses shared data and does nothing"),
+        "",
+        "CppPlatform/Extensions/topdownmovementicon.png",
+        "DummyBehaviorWithSharedData",
+        dummyBehaviorWithSharedData,
+        sharedData
+      )
+      .setIncludeFile(
+        "Extensions/ExampleJsExtension/dummywithshareddataruntimebehavior.js"
+      )
+      // You can optionally include more than one file when the behavior is used:
+      .addIncludeFile(
+        "Extensions/ExampleJsExtension/examplejsextensiontools.js"
+      );
+
+    // Declare an object.
+    // Create a new gd.ObjectJsImplementation object and implement the methods
+    // that are called to get and set the properties of the object, as well
+    // as the properties of the initial instances of this object
+    // Everything that is stored inside the object is in "content" and is automatically
+    // saved/loaded to JSON.
+    var dummyObject = new gd.ObjectJsImplementation();
+    dummyObject.updateProperty = function(
+      objectContent,
+      propertyName,
+      newValue
+    ) {
+      if (propertyName === "My first property") {
+        objectContent.property1 = newValue;
+        return true;
+      }
+      if (propertyName === "My other property") {
+        objectContent.property2 = newValue === "1";
+        return true;
+      }
+      if (propertyName === "My third property") {
+        objectContent.property3 = newValue;
+        return true;
+      }
+
+      return false;
+    };
+    dummyObject.getProperties = function(objectContent) {
+      var objectProperties = new gd.MapStringPropertyDescriptor();
+
+      objectProperties.set(
+        "My first property",
+        new gd.PropertyDescriptor(objectContent.property1)
+      );
+      objectProperties.set(
+        "My other property",
+        new gd.PropertyDescriptor(
+          objectContent.property2 ? "true" : "false"
+        ).setType("boolean")
+      );
+      objectProperties.set(
+        "My third property",
+        new gd.PropertyDescriptor(objectContent.property3.toString()).setType(
+          "number"
+        )
+      );
+
+      return objectProperties;
+    };
+    dummyObject.setRawJSONContent(
+      JSON.stringify({
+        property1: "Initial value",
+        property2: true,
+        property3: 123
+      })
+    );
+
+    dummyObject.updateInitialInstanceProperty = function(
+      objectContent,
+      instance,
+      propertyName,
+      newValue,
+      project,
+      layout
+    ) {
+      if (propertyName === "My instance property") {
+        instance.setRawStringProperty("instanceprop1", newValue);
+        return true;
+      }
+      if (propertyName === "My other instance property") {
+        instance.setRawFloatProperty("instanceprop2", parseFloat(newValue));
+        return true;
+      }
+
+      return false;
+    };
+    dummyObject.getInitialInstanceProperties = function(
+      content,
+      instance,
+      project,
+      layout
+    ) {
+      var instanceProperties = new gd.MapStringPropertyDescriptor();
+
+      instanceProperties.set(
+        "My instance property",
+        new gd.PropertyDescriptor(
+          instance.getRawStringProperty("instanceprop1")
+        )
+      );
+      instanceProperties.set(
+        "My other instance property",
+        new gd.PropertyDescriptor(
+          instance.getRawFloatProperty("instanceprop2").toString()
+        ).setType("number")
+      );
+
+      return instanceProperties;
+    };
+
+    extension.addObject(
+      "DummyObject",
+      t("Dummy object for testing"),
+      t("This dummy object does nothing"),
+      "CppPlatform/Extensions/topdownmovementicon.png",
+      dummyObject
+    );
+
+    return extension;
+  },
+  /**
+   * You can optionally add sanity tests that will check the basic working
+   * of your extension behaviors/objects by instanciating behaviors/objects
+   * and setting the property to a given value.
+   * 
+   * If you don't have any tests, you can simply return an empty array like this:
+   * `runExtensionSanityTests: function(gd, extension) { return []; }`
+   * 
+   * But it is recommended to create tests for the behaviors/objects properties you created
+   * to avoid mistakes.
+   */
+  runExtensionSanityTests: function(gd, extension) {
+    const dummyBehavior = extension
+      .getBehaviorMetadata("MyDummyExtension::DummyBehavior")
+      .get();
+    const sharedData = extension
+      .getBehaviorMetadata("MyDummyExtension::DummyBehaviorWithSharedData")
+      .getSharedDataInstance();
+    return [
+      gd.ProjectHelper.sanityCheckBehaviorProperty(
+        dummyBehavior,
+        "My first property",
+        "Testing value"
+      ),
+      gd.ProjectHelper.sanityCheckBehaviorsSharedDataProperty(
+        sharedData,
+        "My shared property",
+        "Testing value"
+      )
+    ];
+  }
+};

Extensions/ExampleJsExtension/dummyruntimebehavior.js

@@ -0,0 +1,35 @@
+/**
+ * The DummyRuntimeBehavior changes a variable in the object that is owning
+ * it, at every tick before events are run, to set it to the string that was
+ * set in one of the behavior property.
+ *
+ * @class DummyRuntimeBehavior
+ * @extends gdjs.RuntimeBehavior
+ * @constructor
+ */
+gdjs.DummyRuntimeBehavior = function(runtimeScene, behaviorData, owner)
+{
+    gdjs.RuntimeBehavior.call(this, runtimeScene, behaviorData, owner);
+
+    // Here you can access to the behavior data (JSON declared in JsExtension.js)
+    // using behaviorData.content:
+    this._textToSet = behaviorData.content.property1;
+
+    // You can also run arbitrary code at the creation of the behavior:
+    console.log("DummyRuntimeBehavior was created for object:", owner);
+};
+
+gdjs.DummyRuntimeBehavior.prototype = Object.create( gdjs.RuntimeBehavior.prototype );
+gdjs.DummyRuntimeBehavior.thisIsARuntimeBehaviorConstructor = "MyDummyExtension::DummyBehavior";
+
+gdjs.DummyRuntimeBehavior.prototype.onDeActivate = function() {
+};
+
+gdjs.DummyRuntimeBehavior.prototype.doStepPreEvents = function(runtimeScene) {
+    // This is run at every frame, before events are launched.
+    this.owner.getVariables().get("VariableSetFromBehavior").setString(this._textToSet);
+};
+
+gdjs.DummyRuntimeBehavior.prototype.doStepPostEvents = function(runtimeScene) {
+    // This is run at every frame, after events are launched.
+};

Extensions/ExampleJsExtension/dummywithshareddataruntimebehavior.js

@@ -0,0 +1,36 @@
+/**
+ * @class DummyWithSharedDataRuntimeBehavior
+ * @extends gdjs.RuntimeBehavior
+ * @constructor
+ */
+gdjs.DummyWithSharedDataRuntimeBehavior = function(runtimeScene, behaviorData, owner)
+{
+    gdjs.RuntimeBehavior.call(this, runtimeScene, behaviorData, owner);
+
+    // Here you can access to the behavior data (JSON declared in JsExtension.js)
+    // using behaviorData.content:
+    this._textToSet = behaviorData.content.property1;
+
+    // You can also access to the shared data:
+    var sharedData = runtimeScene.getInitialSharedDataForBehavior(behaviorData.name);
+    this._textToSet = sharedData.content.sharedProperty1;
+
+    // You can also run arbitrary code at the creation of the behavior:
+    console.log("DummyWithSharedDataRuntimeBehavior was created for object:", owner);
+    console.log("The shared data are:", sharedData);
+};
+
+gdjs.DummyWithSharedDataRuntimeBehavior.prototype = Object.create( gdjs.RuntimeBehavior.prototype );
+gdjs.DummyWithSharedDataRuntimeBehavior.thisIsARuntimeBehaviorConstructor = "MyDummyExtension::DummyBehaviorWithSharedData";
+
+gdjs.DummyWithSharedDataRuntimeBehavior.prototype.onDeActivate = function() {
+};
+
+gdjs.DummyWithSharedDataRuntimeBehavior.prototype.doStepPreEvents = function(runtimeScene) {
+    // This is run at every frame, before events are launched.
+    this.owner.getVariables().get("VariableSetFromBehavior").setString(this._textToSet);
+};
+
+gdjs.DummyWithSharedDataRuntimeBehavior.prototype.doStepPostEvents = function(runtimeScene) {
+    // This is run at every frame, after events are launched.
+};

Extensions/ExampleJsExtension/examplejsextensiontools.js

@@ -0,0 +1,73 @@
+/**
+ * This is an example of some functions that can be used through events.
+ * They could live on any object but it's usual to store them in an object
+ * with the extension name in `gdjs.evtTools`.
+ *
+ * Functions are being passed the arguments that were declared in the extension.
+ *
+ * @memberof gdjs.evtTools
+ * @class exampleJsExtension
+ * @static
+ * @private
+ */
+gdjs.evtTools.exampleJsExtension = {};
+
+gdjs.evtTools.exampleJsExtension.myConditionFunction = function(number, text) {
+  return number <= 10 && text.length < 5;
+};
+
+gdjs.evtTools.exampleJsExtension.getString = function() {
+  return "Hello World";
+};
+
+/**
+ * You can also attach an object to gdjs, that you can use to store more information
+ * or objects - even if you should have doing so as global state can make things harder
+ * to debug. Most of the time you can have all the logic in your functions, your gdjs.RuntimeBehavior
+ * or your gdjs.RuntimeObject.
+ */
+gdjs.exampleJsExtension = {
+  myGlobalString: "Hello World"
+};
+
+/**
+ * In **rare cases** you may want to run code at the start of the scene. You can define a callback
+ * that will be called at this moment. Name you callback gdjsCallbackRuntimeSceneLoaded.
+ * GDJS will scan anything declared inside gdjs for these names.
+ */
+gdjs.exampleJsExtension.gdjsCallbackRuntimeSceneLoaded = function(
+  runtimeScene
+) {
+  console.log("A gdjs.RuntimeScene was loaded:", runtimeScene);
+};
+
+/**
+ * In **rare cases** you may want to run code at the end of a scene. You can define a callback
+ * that will be called at this moment. Name you callback gdjsCallbackRuntimeSceneLoaded.
+ * GDJS will scan anything declared inside gdjs for these names.
+ */
+gdjs.exampleJsExtension.callbacksRuntimeSceneUnloaded = function(runtimeScene) {
+  console.log("A gdjs.RuntimeScene was unloaded:", runtimeScene);
+};
+
+/**
+ * In **very rare cases** you may want to run code whenever an object is deleted.
+ * You can create a callback named "callbacksObjectDeletedFromScene" on your extension object.
+ * GDJS will scan anything declared inside gdjs for this name.
+ */
+gdjs.exampleJsExtension.callbacksObjectDeletedFromScene = function(
+  runtimeScene,
+  runtimeObject
+) {
+  console.log(
+    "A gdjs.RuntimeObject was deleted from a gdjs.RuntimeScene:",
+    runtimeScene,
+    runtimeObject
+  );
+};
+
+// Finally, note that you can also simply run code here. Most of the time you shouldn't need it though.
+console.log(
+  "gdjs.exampleJsExtension was created, with myGlobalString containing:" +
+    gdjs.exampleJsExtension.myGlobalString
+);

Extensions/FacebookInstantGames/CMakeLists.txt

@@ -1,21 +0,0 @@
-cmake_minimum_required(VERSION 2.6)
-cmake_policy(SET CMP0015 NEW)
-
-project(FacebookInstantGames)
-gd_add_extension_includes()
-
-#Defines
-###
-gd_add_extension_definitions(FacebookInstantGames)
-
-#The targets
-###
-include_directories(.)
-file(GLOB source_files *.cpp *.h)
-
-gd_add_extension_target(FacebookInstantGames "${source_files}" "JsPlatform")
-gd_add_clang_utils(FacebookInstantGames "${source_files}")
-
-#Linker files for the IDE extension
-###
-gd_extension_link_libraries(FacebookInstantGames)

Extensions/FacebookInstantGames/JsExtension.cpp

@@ -1,74 +0,0 @@
-/**
-
-GDevelop - Facebook Instant Games Extension
-Copyright (c)2018  Florian Rival (Florian.Rival@gmail.com)
-This project is released under the MIT License.
-*/
-#if defined(GD_IDE_ONLY)
-#include "GDCore/Extensions/PlatformExtension.h"
-#include "GDCore/Tools/Localization.h"
-
-void DeclareFacebookInstantGamesExtension(gd::PlatformExtension& extension) {
-  extension.SetExtensionInformation(
-      "FacebookInstantGames",
-      _("Facebook Instant Games"),
-      _("Allow your game to send scores and interact with Facebook Instant Games"),
-      "Florian Rival",
-      "Open source (MIT License)");
-
-#if defined(GD_IDE_ONLY)
-  extension.AddStrExpression("PlayerId",
-                    _("Player identifier"),
-                    _("Get the player unique identifier"),
-                    _("Facebook Instant Games"),
-                    "JsPlatform/Extensions/Facebookicon16.png");
-
-  extension.AddStrExpression("PlayerName",
-                    _("Player name"),
-                    _("Get the player name"),
-                    _("Facebook Instant Games"),
-                    "JsPlatform/Extensions/Facebookicon16.png");
-#endif
-}
-
-/**
- * \brief This class declares information about the JS extension.
- */
-class FacebookInstantGamesJsExtension : public gd::PlatformExtension {
- public:
-  /**
-   * \brief Constructor of an extension declares everything the extension
-   * contains: objects, actions, conditions and expressions.
-   */
-  FacebookInstantGamesJsExtension() {
-    DeclareFacebookInstantGamesExtension(*this);
-
-    GetAllStrExpressions()["FacebookInstantGames::PlayerId"]
-        .codeExtraInformation
-        .SetIncludeFile("Extensions/FacebookInstantGames/facebookinstantgamestools.js")
-        .SetFunctionName("gdjs.evtTools.facebookInstantGames.getPlayerId()");
-        
-    GetAllStrExpressions()["FacebookInstantGames::PlayerName"]
-        .codeExtraInformation
-        .SetIncludeFile("Extensions/FacebookInstantGames/facebookinstantgamestools.js")
-        .SetFunctionName("gdjs.evtTools.facebookInstantGames.getPlayerName()");
-
-    StripUnimplementedInstructionsAndExpressions();
-    GD_COMPLETE_EXTENSION_COMPILATION_INFORMATION();
-  };
-};
-
-#if defined(EMSCRIPTEN)
-extern "C" gd::PlatformExtension* CreateGDJSFacebookInstantGamesExtension() {
-  return new FacebookInstantGamesJsExtension;
-}
-#else
-/**
- * Used by GDevelop to create the extension class
- * -- Do not need to be modified. --
- */
-extern "C" gd::PlatformExtension* GD_EXTENSION_API CreateGDJSExtension() {
-  return new FacebookInstantGamesJsExtension;
-}
-#endif
-#endif

Extensions/FacebookInstantGames/JsExtension.js

@@ -0,0 +1,219 @@
+/**
+ * This is a declaration of an extension for GDevelop 5.
+ *
+ * ℹ️ Run `node import-GDJS-Runtime.js` (in newIDE/app/scripts) if you make any change
+ * to this extension file or to any other *.js file that you reference inside.
+ *
+ * The file must be named "JsExtension.js", otherwise GDevelop won't load it.
+ * ⚠️ If you make a change and the extension is not loaded, open the developer console
+ * and search for any errors.
+ *
+ * More information on https://github.com/4ian/GD/blob/master/newIDE/README-extensions.md
+ */
+module.exports = {
+  createExtension: function(t, gd) {
+    const extension = new gd.PlatformExtension();
+    extension
+      .setExtensionInformation(
+        "FacebookInstantGames",
+        t("Facebook Instant Games"),
+        t(
+          "Allow your game to send scores and interact with Facebook Instant Games"
+        ),
+        "Florian Rival",
+        "Open source (MIT License)"
+      )
+      .setExtensionHelpPath("/publishing/publishing-to-facebook-instant-games");
+
+    extension
+      .addAction(
+        "SavePlayerData",
+        t("Save player data"),
+        t(
+          "Save the content of the given variable in the player data, stored on Facebook Instant Games servers"
+        ),
+        t(
+          "Save the content of _PARAM1_ in key _PARAM1_ of player data (store success message in _PARAM2_ or error in _PARAM3_)"
+        ),
+        t("Facebook Instant Games/Player data"),
+        "JsPlatform/Extensions/facebookicon24.png",
+        "JsPlatform/Extensions/facebookicon16.png"
+      )
+      .addParameter("string", 'Data key name (e.g: "Lives")', "", false)
+      .addParameter("scenevar", "Variable with the content to save", "", false)
+      .addParameter(
+        "scenevar",
+        t("Variable where to store the success message (optional)"),
+        "",
+        true
+      )
+      .addParameter(
+        "scenevar",
+        t("Variable where to error message (optional, if an error occurs)"),
+        "",
+        true
+      )
+      .getCodeExtraInformation()
+      .setIncludeFile(
+        "Extensions/FacebookInstantGames/facebookinstantgamestools.js"
+      )
+      .setFunctionName("gdjs.evtTools.facebookInstantGames.setPlayerData");
+
+    extension
+      .addAction(
+        "LoadPlayerData",
+        t("Load player data"),
+        t("Load the player data with the given key in a variable"),
+        t(
+          "Load player data with key _PARAM0_ in _PARAM1_ (or error in _PARAM2_)"
+        ),
+        t("Facebook Instant Games/Player data"),
+        "JsPlatform/Extensions/facebookicon24.png",
+        "JsPlatform/Extensions/facebookicon16.png"
+      )
+      .addParameter("string", t('Data key name (e.g: "Lives")'), "", false)
+      .addParameter(
+        "scenevar",
+        t("Variable where to store loaded data"),
+        "",
+        false
+      )
+      .addParameter(
+        "scenevar",
+        t("Variable where to error message (optional, if an error occurs)"),
+        "",
+        true
+      )
+      .getCodeExtraInformation()
+      .setIncludeFile(
+        "Extensions/FacebookInstantGames/facebookinstantgamestools.js"
+      )
+      .setFunctionName("gdjs.evtTools.facebookInstantGames.loadPlayerData");
+
+    extension
+      .addAction(
+        "SavePlayerScore",
+        t("Save player score"),
+        t(
+          "Save the score, and optionally the content of the given variable in the player score, for the given metadata."
+        ),
+        t(
+          "In leaderboard _PARAM0_, save score _PARAM1_ for the player and extra data from _PARAM2_ (store success message in _PARAM3_ or error in _PARAM4_)"
+        ),
+        t("Facebook Instant Games/Leaderboards"),
+        "JsPlatform/Extensions/facebookicon24.png",
+        "JsPlatform/Extensions/facebookicon16.png"
+      )
+      .addParameter(
+        "string",
+        'Leaderboard name (e.g: "PlayersBestTimes")',
+        "",
+        false
+      )
+      .addParameter("expression", "Score to register for the player", "", false)
+      .addParameter(
+        "scenevar",
+        t("Optional variable with metadata to save"),
+        "",
+        true
+      )
+      .addParameter(
+        "scenevar",
+        t("Variable where to store the success message (optional)"),
+        "",
+        true
+      )
+      .addParameter(
+        "scenevar",
+        t("Variable where to error message (optional, if an error occurs)"),
+        "",
+        true
+      )
+      .getCodeExtraInformation()
+      .setIncludeFile(
+        "Extensions/FacebookInstantGames/facebookinstantgamestools.js"
+      )
+      .setFunctionName("gdjs.evtTools.facebookInstantGames.setPlayerScore");
+
+    extension
+      .addAction(
+        "LoadPlayerEntry",
+        t("Load player entry"),
+        t("Load the player entry in the given leaderboard"),
+        t(
+          "Load player entry from leaderboard _PARAM0_. Set rank in _PARAM1_, score in _PARAM2_ (extra data if any in _PARAM3_ and error in _PARAM4_)"
+        ),
+        t("Facebook Instant Games/Leaderboards"),
+        "JsPlatform/Extensions/facebookicon24.png",
+        "JsPlatform/Extensions/facebookicon16.png"
+      )
+      .addParameter(
+        "string",
+        t('Leaderboard name (e.g: "PlayersBestTimes")'),
+        "",
+        false
+      )
+      .addParameter(
+        "scenevar",
+        t("Variable where to store the player rank (of -1 if not ranked)"),
+        "",
+        true
+      )
+      .addParameter(
+        "scenevar",
+        t("Variable where to store the player score (of -1 if no score)"),
+        "",
+        true
+      )
+      .addParameter(
+        "scenevar",
+        t("Variable where to store extra data (if any)"),
+        "",
+        true
+      )
+      .addParameter(
+        "scenevar",
+        t("Variable where to error message (optional, if an error occurs)"),
+        "",
+        true
+      )
+      .getCodeExtraInformation()
+      .setIncludeFile(
+        "Extensions/FacebookInstantGames/facebookinstantgamestools.js"
+      )
+      .setFunctionName("gdjs.evtTools.facebookInstantGames.getPlayerEntry");
+
+    extension
+      .addStrExpression(
+        "PlayerId",
+        t("Player identifier"),
+        t("Get the player unique identifier"),
+        t("Facebook Instant Games"),
+        "JsPlatform/Extensions/facebookicon16.png"
+      )
+      .getCodeExtraInformation()
+      .setIncludeFile(
+        "Extensions/FacebookInstantGames/facebookinstantgamestools.js"
+      )
+      .setFunctionName("gdjs.evtTools.facebookInstantGames.getPlayerId");
+
+    extension
+      .addStrExpression(
+        "PlayerName",
+        t("Player name"),
+        t("Get the player name"),
+        t("Facebook Instant Games"),
+        "JsPlatform/Extensions/facebookicon16.png"
+      )
+      .getCodeExtraInformation()
+      .setIncludeFile(
+        "Extensions/FacebookInstantGames/facebookinstantgamestools.js"
+      )
+      .setFunctionName("gdjs.evtTools.facebookInstantGames.getPlayerName");
+
+    return extension;
+  },
+  runExtensionSanityTests: function(gd, extension) {
+    return [];
+  }
+};

Extensions/FacebookInstantGames/facebookinstantgamestools.js

@@ -0,0 +1,183 @@
+/**
+ * @memberof gdjs.evtTools
+ * @class facebookInstantGames
+ * @static
+ * @private
+ */
+gdjs.evtTools.facebookInstantGames = {};
+
+gdjs.evtTools.facebookInstantGames.getPlayerId = function() {
+  if (typeof FBInstant === "undefined") return "";
+
+  return FBInstant.player.getID() || "";
+};
+
+gdjs.evtTools.facebookInstantGames.getPlayerName = function() {
+  if (typeof FBInstant === "undefined") return "";
+
+  return FBInstant.player.getName() || "";
+};
+
+gdjs.evtTools.facebookInstantGames.loadPlayerData = function(
+  key,
+  successVariable,
+  errorVariable
+) {
+  if (typeof FBInstant === "undefined") return;
+  errorVariable.setString("");
+  successVariable.setString("");
+
+  FBInstant.player
+    .getDataAsync([key])
+    .then(function(data) {
+      gdjs.evtTools.network.jsonToVariableStructure(data[key], successVariable);
+    })
+    .catch(function(error) {
+      errorVariable.setString(error.message || "Unknown error");
+    });
+};
+
+gdjs.evtTools.facebookInstantGames.setPlayerData = function(
+  key,
+  variable,
+  successVariable,
+  errorVariable
+) {
+  if (typeof FBInstant === "undefined") return;
+  errorVariable.setString("");
+  successVariable.setString("");
+
+  var data = {};
+  data[key] = gdjs.evtTools.network.variableStructureToJSON(variable);
+
+  FBInstant.player
+    .setDataAsync(data)
+    .then(function() {
+      successVariable.setString("Player data saved");
+    })
+    .catch(function(error) {
+      errorVariable.setString(error.message || "Unknown error");
+    });
+};
+
+gdjs.evtTools.facebookInstantGames.setPlayerScore = function(
+  leaderboardName,
+  score,
+  extraDataVariable,
+  successVariable,
+  errorVariable
+) {
+  if (typeof FBInstant === "undefined") return;
+  errorVariable.setString("");
+  successVariable.setString("");
+
+  var data = gdjs.evtTools.network.variableStructureToJSON(extraDataVariable);
+
+  FBInstant.getLeaderboardAsync(leaderboardName)
+    .then(function(leaderboard) {
+      return leaderboard.setScoreAsync(score, data);
+    })
+    .then(function() {
+      successVariable.setString("Player score saved");
+    })
+    .catch(function(error) {
+      errorVariable.setString(error.message || "Unknown error");
+    });
+};
+
+gdjs.evtTools.facebookInstantGames.getPlayerEntry = function(
+  leaderboardName,
+  rankVariable,
+  scoreVariable,
+  extraDataVariable,
+  errorVariable
+) {
+  if (typeof FBInstant === "undefined") return;
+  errorVariable.setString("");
+  extraDataVariable.setString("");
+
+  FBInstant.getLeaderboardAsync(leaderboardName)
+    .then(function(leaderboard) {
+      return leaderboard.getPlayerEntryAsync();
+    })
+    .then(function(entry) {
+      rankVariable.setNumber(entry.getRank() === null ? -1 : entry.getRank());
+      scoreVariable.setNumber(entry.getScore() === null ? -1 : entry.getScore());
+      gdjs.evtTools.network.jsonToVariableStructure(
+        entry.getExtraData(),
+        extraDataVariable
+      );
+    })
+    .catch(function(error) {
+      errorVariable.setString(error.message || "Unknown error");
+    });
+};
+
+if (typeof FBInstant === "undefined" && typeof window !== "undefined") {
+  console.log("Creating a mocked version of Facebook Instant Games");
+
+  function MockedLeaderboard() {
+    this._playerScore = null;
+    this._playerRank = null;
+    this._playerExtraData = null;
+  }
+  MockedLeaderboard.prototype.setScoreAsync = function(score, extraData) {
+    var that = this;
+    return new Promise(function(resolve) {
+      that._playerScore = score;
+      that._playerRank = 1;
+      that._playerExtraData = extraData;
+      resolve();
+    });
+  };
+  MockedLeaderboard.prototype.getPlayerEntryAsync = function() {
+    var that = this;
+    return new Promise(function(resolve) {
+      resolve({
+        getScore: function() {
+          return that._playerScore;
+        },
+        getRank: function() {
+          return that._playerRank;
+        },
+        getExtraData: function() {
+          return that._playerExtraData;
+        }
+      });
+    });
+  };
+
+  var FBInstantMock = {
+    _mockedPlayerData: {},
+    _mockedLeaderboards: {},
+    player: {
+      getName: function() {
+        return "Fake player name";
+      },
+      getID: function() {
+        return "12345678";
+      },
+      getDataAsync: function(key) {
+        return new Promise(function(resolve) {
+          resolve(FBInstantMock._mockedPlayerData);
+        });
+      },
+      setDataAsync: function(data) {
+        return new Promise(function(resolve) {
+          FBInstantMock._mockedPlayerData = data;
+          resolve();
+        });
+      }
+    },
+    getLeaderboardAsync: function(leaderboardName) {
+      return new Promise(function(resolve) {
+        FBInstantMock._mockedLeaderboards[leaderboardName] =
+          FBInstantMock._mockedLeaderboards[leaderboardName] ||
+          new MockedLeaderboard();
+        resolve(FBInstantMock._mockedLeaderboards[leaderboardName]);
+      });
+    }
+  };
+
+  window.FBInstant = FBInstantMock;
+}

Extensions/FacebookInstantGames/shopifytools.js

@@ -1,19 +0,0 @@
-/**
- * @namespace gdjs.evtTools
- * @class facebookInstantGames
- * @static
- * @private
- */
-gdjs.evtTools.facebookInstantGames = {};
-
-gdjs.evtTools.facebookInstantGames.getPlayerId = function() {
-	if (typeof FBInstant === 'undefined') return;
-
-	return FBInstant.player.getID() || '';
-};
-
-gdjs.evtTools.facebookInstantGames.getPlayerName = function() {
-	if (typeof FBInstant === 'undefined') return;
-
-	return FBInstant.player.getName() || '';
-};

Extensions/Inventory/Extension.cpp

@@ -17,7 +17,8 @@ void DeclareInventoryExtension(gd::PlatformExtension& extension) {
       _("Provides actions and conditions to add an inventory to your game, "
         "with items in memory."),
       "Florian Rival",
-      "Open source (MIT License)");
+      "Open source (MIT License)")
+      .SetExtensionHelpPath("all-features/inventory");
 
 #if defined(GD_IDE_ONLY)
   extension

Extensions/Inventory/inventorytools.js

@@ -16,7 +16,7 @@ gdjs.InventoryManager.get = function(runtimeScene, name) {
 }
 
 /**
- * @namespace gdjs.evtTools
+ * @memberof gdjs.evtTools
  * @class inventory
  * @static
  * @private