Update lint-with-clang-tidy.js

- Don't show in changelog

.circleci/config.yml

@@ -176,6 +176,7 @@ jobs:
 
   # Build the WebAssembly library only (so that it's cached on a S3 and easy to re-use).
   build-gdevelop_js-wasm-only:
+    resource_class: medium+ # Compilation time decrease linearly with the number of CPUs, but not linking (so "large" does not speedup total build time).
     docker:
       - image: cimg/node:16.13
 
@@ -232,10 +233,77 @@ jobs:
           name: Deploy to S3 (latest)
           command: aws s3 sync Binaries/embuild/GDevelop.js s3://gdevelop-gdevelop.js/$(git rev-parse --abbrev-ref HEAD)/latest/
 
+  # Build the WebAssembly library with clang-tidy and memory sanitizers.
+  build-gdevelop_js-debug-sanitizers-and-extra-checks:
+    resource_class: xlarge # Total time decrease linearly with the number of CPUs.
+    docker:
+      - image: cimg/node:16.13
+
+    working_directory: ~/GDevelop
+
+    steps:
+      - checkout
+      - aws-cli/setup
+
+      # System dependencies (for Emscripten)
+      - run:
+          name: Install dependencies for Emscripten
+          command: sudo apt-get update && sudo apt install cmake
+
+      - run:
+          name: Install dependencies for clang-tidy v19
+          command: wget https://apt.llvm.org/llvm.sh && chmod +x llvm.sh && sudo ./llvm.sh 19 && sudo apt install clang-tidy-19
+
+      - run:
+          name: Install Python3 dependencies for Emscripten
+          command: sudo apt install python-is-python3 python3-distutils -y
+
+      - run:
+          name: Install Emscripten (for GDevelop.js)
+          command: git clone https://github.com/juj/emsdk.git && cd emsdk && ./emsdk install 3.1.21 && ./emsdk activate 3.1.21 && cd ..
+
+      # GDevelop.js dependencies
+      - restore_cache:
+          keys:
+            - gdevelop.js-linux-nodejs-dependencies-{{ checksum "GDevelop.js/package-lock.json" }}
+            # fallback to using the latest cache if no exact match is found
+            - gdevelop.js-linux-nodejs-dependencies-
+
+      - run:
+          name: Install GDevelop.js dependencies and build it
+          command: cd GDevelop.js && npm install && cd ..
+
+      # Build GDevelop.js
+      - run:
+          name: Build GDevelop.js ('debug-sanitizers' variant)
+          command: cd GDevelop.js && source ../emsdk/emsdk_env.sh && npm run build -- --variant=debug-sanitizers
+
+      - run:
+          name: Run clang-tidy
+          command: cd GDevelop.js && npm run lint
+
+      - run:
+          name: Run tests
+          command: cd GDevelop.js && npm run test -- --maxWorkers=4
+
+      # Upload artifacts (CircleCI)
+      - store_artifacts:
+          path: Binaries/embuild/GDevelop.js
+
+      # Upload artifacts (AWS)
+      - run:
+          name: Deploy to S3 (specific commit)
+          command: aws s3 sync Binaries/embuild/GDevelop.js s3://gdevelop-gdevelop.js/$(git rev-parse --abbrev-ref HEAD)/variant/debug-sanitizers/commit/$(git rev-parse HEAD)/
+
 workflows:
-  builds:
+  gdevelop_js-wasm:
     jobs:
       - build-gdevelop_js-wasm-only
+  gdevelop_js-wasm-extra-checks:
+    jobs:
+      - build-gdevelop_js-debug-sanitizers-and-extra-checks
+  builds:
+    jobs:
       - build-macos:
           filters:
             branches:

.clang-tidy

@@ -0,0 +1,4 @@
+Checks: 'clang-diagnostic-*,clang-analyzer-*,cppcoreguidelines-*,-cppcoreguidelines-explicit-virtual-functions,-cppcoreguidelines-avoid-const-or-ref-data-members,-cppcoreguidelines-special-member-functions,-cppcoreguidelines-avoid-magic-numbers,-cppcoreguidelines-non-private-member-variables-in-classes,-cppcoreguidelines-owning-memory,-cppcoreguidelines-virtual-class-destructor,-clang-analyzer-optin.performance.Padding,-cppcoreguidelines-narrowing-conversions'
+WarningsAsErrors: 'cppcoreguidelines-pro-type-member-init, clang-analyzer-optin.cplusplus.UninitializedObject'
+HeaderFilterRegex: '.*'
+FormatStyle: none

.gitattributes

@@ -3,6 +3,7 @@ Extensions/ParticleSystem/SPARK/* linguist-vendored
 Extensions/PhysicsBehavior/Box2D/* linguist-vendored
 Extensions/PhysicsBehavior/box2djs/* linguist-vendored
 Extensions/Physics2Behavior/box2d.js linguist-vendored
+Extensions/Physics3DBehavior/*.wasm-compat.js linguist-vendored
 Extensions/BBText/pixi-multistyle-text/* linguist-vendored
 Extensions/P2P/A_peer.js linguist-vendored
 Extensions/Multiplayer/peer.js linguist-vendored

.github/workflows/gdcore-tools-hook.yml

@@ -0,0 +1,22 @@
+# This worflow notifies arthuro555's gdcore-tools repository when a new release is published.
+#
+# This is used to allow gdcore-tools, a library to use GDCore outside of GDevelop,
+# to attempt to automatically build, test, and publish a release for the new
+# GDevelop version.
+name: Trigger gdcore-tools pipeline
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  dispatch-event:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Repository Dispatch
+        uses: peter-evans/repository-dispatch@v3
+        with:
+          token: ${{ secrets.GDCORE_TOOLS_PAT }}
+          repository: arthuro555/gdcore-tools
+          event-type: gdevelop-release
+          client-payload: '{"release": ${{ toJson(github.event.release) }}}'

.vscode/settings.json

@@ -114,7 +114,8 @@
     "__bits": "cpp",
     "__verbose_abort": "cpp",
     "variant": "cpp",
-    "charconv": "cpp"
+    "charconv": "cpp",
+    "execution": "cpp"
   },
   "files.exclude": {
     "Binaries/*build*": true,

CMakeLists.txt

@@ -60,7 +60,7 @@ if("${CMAKE_BUILD_TYPE}" STREQUAL "Release" AND NOT WIN32 AND CMAKE_COMPILER_IS_
 endif()
 
 #Activate C++11
-set(CMAKE_CXX_STANDARD 11) # Upgrading to C++17 would need to remove usage of bind2nd (should be easy).
+set(CMAKE_CXX_STANDARD 11) # Upgrading to C++17 should be tried.
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 # Mark some warnings as errors
@@ -69,12 +69,18 @@ if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
 	# uninitialized variables or other hard to debug bugs.
 	add_compile_options(
 		-Wall
+		-Wextra
+		-Wuninitialized
+		-Wconditional-uninitialized
 		-Wno-unknown-warning-option
 		-Wno-reorder-ctor
 		-Wno-reorder
+		-Wno-unused-parameter
 		-Wno-pessimizing-move
-		-Wno-unused-variable
+		-Wno-unused-variable # Not a good style, but not a risk
 		-Wno-unused-private-field
+		-Wno-ignored-qualifiers # Not a risk
+		-Wno-sign-compare # Not a big risk
 
 		# Make as much warnings considered as errors as possible (only one for now).
 		-Werror=return-stack-address

Core/GDCore/Events/Builtin/WhileEvent.h

@@ -72,8 +72,6 @@ class GD_CORE_API WhileEvent : public gd::BaseEvent {
                               ///< de/activate infinite loop warning when the
                               ///< user create the event
 
-  mutable unsigned int whileConditionsHeight;
-
   int GetConditionsHeight() const;
   int GetActionsHeight() const;
   int GetWhileConditionsHeight() const;

Core/GDCore/Events/CodeGeneration/DiagnosticReport.h

@@ -14,10 +14,10 @@
 namespace gd {
 
 /**
- * \brief 
+ * \brief
  */
 class GD_CORE_API ProjectDiagnostic {
-public:
+ public:
   enum ErrorType {
     UndeclaredVariable,
     MissingBehavior,
@@ -25,12 +25,17 @@ public:
     MismatchedObjectType,
   };
 
-  ProjectDiagnostic(ErrorType type_, const gd::String &message_,
+  ProjectDiagnostic(ErrorType type_,
+                    const gd::String &message_,
                     const gd::String &actualValue_,
-                    const gd::String &expectedValue_, const gd::String &objectName_ = "")
-      : type(type_), message(message_), actualValue(actualValue_), expectedValue(expectedValue_),
-        objectName(objectName_){};
-  virtual ~ProjectDiagnostic(){};
+                    const gd::String &expectedValue_,
+                    const gd::String &objectName_ = "")
+      : type(type_),
+        message(message_),
+        actualValue(actualValue_),
+        expectedValue(expectedValue_),
+        objectName(objectName_) {};
+  virtual ~ProjectDiagnostic() {};
 
   ErrorType GetType() const { return type; };
   const gd::String &GetMessage() const { return message; }
@@ -38,7 +43,7 @@ public:
   const gd::String &GetActualValue() const { return actualValue; }
   const gd::String &GetExpectedValue() const { return expectedValue; }
 
-private:
+ private:
   ErrorType type;
   gd::String message;
   gd::String objectName;
@@ -47,12 +52,12 @@ private:
 };
 
 /**
- * \brief 
+ * \brief
  */
 class GD_CORE_API DiagnosticReport {
-public:
-  DiagnosticReport(){};
-  virtual ~DiagnosticReport(){};
+ public:
+  DiagnosticReport() {};
+  virtual ~DiagnosticReport() {};
 
   void Add(const gd::ProjectDiagnostic &projectDiagnostic) {
     projectDiagnostics.push_back(
@@ -67,32 +72,39 @@ public:
 
   const gd::String &GetSceneName() const { return sceneName; }
 
-  void SetSceneName(const gd::String &sceneName_) {
-    sceneName = sceneName_;
+  void SetSceneName(const gd::String &sceneName_) { sceneName = sceneName_; }
+
+  void LogAllDiagnostics() {
+    for (auto &diagnostic : projectDiagnostics) {
+      std::cout << diagnostic->GetMessage()
+                << "(object: " << diagnostic->GetObjectName()
+                << ", actual value: " << diagnostic->GetActualValue()
+                << ", expected value: " << diagnostic->GetExpectedValue() << ")"
+                << std::endl;
+    }
   }
 
-private:
+ private:
   std::vector<std::unique_ptr<gd::ProjectDiagnostic>> projectDiagnostics;
   gd::String sceneName;
 };
 
 /**
- * \brief 
+ * \brief
  */
 class GD_CORE_API WholeProjectDiagnosticReport {
-public:
-  WholeProjectDiagnosticReport(){};
-  virtual ~WholeProjectDiagnosticReport(){};
+ public:
+  WholeProjectDiagnosticReport() {};
+  virtual ~WholeProjectDiagnosticReport() {};
 
   const DiagnosticReport &Get(std::size_t index) const {
     return *diagnosticReports[index].get();
   };
 
-  void Clear() {
-    diagnosticReports.clear();
-  };
+  void Clear() { diagnosticReports.clear(); };
 
-  DiagnosticReport& AddNewDiagnosticReportForScene(const gd::String &sceneName) {
+  DiagnosticReport &AddNewDiagnosticReportForScene(
+      const gd::String &sceneName) {
     auto diagnosticReport = gd::make_unique<gd::DiagnosticReport>();
     diagnosticReport->SetSceneName(sceneName);
     diagnosticReports.push_back(std::move(diagnosticReport));
@@ -102,7 +114,7 @@ public:
   std::size_t Count() const { return diagnosticReports.size(); };
 
   bool HasAnyIssue() {
-    for (auto& diagnosticReport : diagnosticReports) {
+    for (auto &diagnosticReport : diagnosticReports) {
       if (diagnosticReport->Count() > 0) {
         return true;
       }
@@ -110,8 +122,8 @@ public:
     return false;
   }
 
-private:
+ private:
   std::vector<std::unique_ptr<gd::DiagnosticReport>> diagnosticReports;
 };
 
-} // namespace gd
+}  // namespace gd

Core/GDCore/Events/CodeGeneration/EventsCodeGenerator.cpp

@@ -345,14 +345,14 @@ gd::String EventsCodeGenerator::GenerateConditionCode(
         gd::ProjectDiagnostic projectDiagnostic(
             gd::ProjectDiagnostic::ErrorType::UnknownObject, "",
             objectInParameter, "");
-        diagnosticReport->Add(projectDiagnostic);
+        if (diagnosticReport) diagnosticReport->Add(projectDiagnostic);
         return "/* Unknown object - skipped. */";
       } else if (!expectedObjectType.empty() &&
                  actualObjectType != expectedObjectType) {
         gd::ProjectDiagnostic projectDiagnostic(
             gd::ProjectDiagnostic::ErrorType::MismatchedObjectType, "",
             actualObjectType, expectedObjectType, objectInParameter);
-        diagnosticReport->Add(projectDiagnostic);
+        if (diagnosticReport) diagnosticReport->Add(projectDiagnostic);
         return "/* Mismatched object type - skipped. */";
       }
     }
@@ -509,7 +509,7 @@ void EventsCodeGenerator::CheckBehaviorParameters(
             gd::ProjectDiagnostic projectDiagnostic(
                 gd::ProjectDiagnostic::ErrorType::MissingBehavior, "",
                 actualBehaviorType, expectedBehaviorType, lastObjectName);
-            diagnosticReport->Add(projectDiagnostic);
+            if (diagnosticReport) diagnosticReport->Add(projectDiagnostic);
           }
         }
       });
@@ -567,14 +567,14 @@ gd::String EventsCodeGenerator::GenerateActionCode(
         gd::ProjectDiagnostic projectDiagnostic(
             gd::ProjectDiagnostic::ErrorType::UnknownObject, "",
             objectInParameter, "");
-        diagnosticReport->Add(projectDiagnostic);
+        if (diagnosticReport) diagnosticReport->Add(projectDiagnostic);
         return "/* Unknown object - skipped. */";
       } else if (!expectedObjectType.empty() &&
                  actualObjectType != expectedObjectType) {
         gd::ProjectDiagnostic projectDiagnostic(
             gd::ProjectDiagnostic::ErrorType::MismatchedObjectType, "",
             actualObjectType, expectedObjectType, objectInParameter);
-        diagnosticReport->Add(projectDiagnostic);
+        if (diagnosticReport) diagnosticReport->Add(projectDiagnostic);
         return "/* Mismatched object type - skipped. */";
       }
     }
@@ -1358,12 +1358,30 @@ gd::String EventsCodeGenerator::GeneratePropertyGetter(const gd::PropertiesConta
   return "getProperty" + property.GetName() + "As" + type + "()";
 }
 
+gd::String EventsCodeGenerator::GeneratePropertyGetterWithoutCasting(
+    const gd::PropertiesContainer &propertiesContainer,
+    const gd::NamedPropertyDescriptor &property) {
+  return "getProperty" + property.GetName() + "()";
+}
+
+gd::String EventsCodeGenerator::GeneratePropertySetterWithoutCasting(
+    const gd::PropertiesContainer &propertiesContainer,
+    const gd::NamedPropertyDescriptor &property,
+    const gd::String &operandCode) {
+  return "setProperty" + property.GetName() + "(" + operandCode + ")";
+    }
+
 gd::String EventsCodeGenerator::GenerateParameterGetter(const gd::ParameterMetadata& parameter,
                                                         const gd::String& type,
                                                         gd::EventsCodeGenerationContext& context) {
   return "getParameter" + parameter.GetName() + "As" + type + "()";
 }
 
+gd::String EventsCodeGenerator::GenerateParameterGetterWithoutCasting(
+    const gd::ParameterMetadata &parameter) {
+      return "getParameter" + parameter.GetName() + "()";
+    }
+
 EventsCodeGenerator::EventsCodeGenerator(const gd::Project& project_,
                                          const gd::Layout& layout,
                                          const gd::Platform& platform_)

Core/GDCore/Events/CodeGeneration/EventsCodeGenerator.h

@@ -467,7 +467,14 @@ class GD_CORE_API EventsCodeGenerator {
    */
   virtual gd::String GetCodeNamespace() { return ""; };
 
-  enum VariableScope { LAYOUT_VARIABLE = 0, PROJECT_VARIABLE, OBJECT_VARIABLE, ANY_VARIABLE };
+  enum VariableScope {
+    LAYOUT_VARIABLE = 0,
+    PROJECT_VARIABLE,
+    OBJECT_VARIABLE,
+    ANY_VARIABLE,
+    VARIABLE_OR_PROPERTY,
+    VARIABLE_OR_PROPERTY_OR_PARAMETER
+  };
 
   /**
    * Generate a single unique number for the specified instruction.
@@ -510,6 +517,11 @@ class GD_CORE_API EventsCodeGenerator {
   GenerateAnyOrSceneVariableGetter(const gd::Expression &variableExpression,
                                    EventsCodeGenerationContext &context);
 
+  virtual gd::String GeneratePropertySetterWithoutCasting(
+      const gd::PropertiesContainer &propertiesContainer,
+      const gd::NamedPropertyDescriptor &property,
+      const gd::String &operandCode);
+
 protected:
   virtual const gd::String GenerateRelationalOperatorCodes(
       const gd::String& operatorString);
@@ -565,7 +577,8 @@ protected:
       const gd::String& variableName,
       const VariableScope& scope,
       gd::EventsCodeGenerationContext& context,
-      const gd::String& objectName) {
+      const gd::String& objectName,
+      bool hasChild) {
     // This code is only used as a mock.
     // See the real implementation in GDJS.
     if (scope == LAYOUT_VARIABLE) {
@@ -573,7 +586,9 @@ protected:
 
     } else if (scope == PROJECT_VARIABLE) {
       return "getProjectVariable(" + variableName + ")";
-    } else if (scope == ANY_VARIABLE) {
+    } else if (scope == ANY_VARIABLE || scope == VARIABLE_OR_PROPERTY ||
+               scope == VARIABLE_OR_PROPERTY_OR_PARAMETER) {
+      // TODO Split the 3 cases to make tests stronger.
       return "getAnyVariable(" + variableName + ")";
     }
 
@@ -627,11 +642,18 @@ protected:
       const gd::String& type,
       gd::EventsCodeGenerationContext& context);
 
+  virtual gd::String GeneratePropertyGetterWithoutCasting(
+      const gd::PropertiesContainer &propertiesContainer,
+      const gd::NamedPropertyDescriptor &property);
+
   virtual gd::String GenerateParameterGetter(
       const gd::ParameterMetadata& parameter,
       const gd::String& type,
       gd::EventsCodeGenerationContext& context);
 
+  virtual gd::String
+  GenerateParameterGetterWithoutCasting(const gd::ParameterMetadata &parameter);
+
   /**
    * \brief Generate the code to reference an object which is
    * in an empty/null state.

Core/GDCore/Events/CodeGeneration/ExpressionCodeGenerator.cpp

@@ -135,18 +135,20 @@ void ExpressionCodeGenerator::OnVisitVariableNode(VariableNode& node) {
     EventsCodeGenerator::VariableScope scope =
         type == "variable"
             ? gd::EventsCodeGenerator::ANY_VARIABLE
-        : type == "globalvar"
-            ? gd::EventsCodeGenerator::PROJECT_VARIABLE
-            : type == "scenevar"
-                  ? gd::EventsCodeGenerator::LAYOUT_VARIABLE
-                  : gd::EventsCodeGenerator::OBJECT_VARIABLE;
+        : type == "variableOrProperty"
+            ? gd::EventsCodeGenerator::VARIABLE_OR_PROPERTY
+        : type == "variableOrPropertyOrParameter"
+            ? gd::EventsCodeGenerator::VARIABLE_OR_PROPERTY_OR_PARAMETER
+        : type == "globalvar" ? gd::EventsCodeGenerator::PROJECT_VARIABLE
+        : type == "scenevar"  ? gd::EventsCodeGenerator::LAYOUT_VARIABLE
+                              : gd::EventsCodeGenerator::OBJECT_VARIABLE;
 
     auto objectName = gd::ExpressionVariableOwnerFinder::GetObjectName(codeGenerator.GetPlatform(),
                                           codeGenerator.GetObjectsContainersList(),
                                           rootObjectName,
                                           node);
     output += codeGenerator.GenerateGetVariable(
-        node.name, scope, context, objectName);
+        node.name, scope, context, objectName, node.child != nullptr);
     if (node.child) node.child->Visit(*this);
   } else {
     // The node represents a variable or an object variable in an expression waiting for its *value* to be returned.
@@ -163,7 +165,7 @@ void ExpressionCodeGenerator::OnVisitVariableNode(VariableNode& node) {
       output += codeGenerator.GenerateVariableValueAs(type);
     }, [&]() {
       output += codeGenerator.GenerateGetVariable(
-          node.name, gd::EventsCodeGenerator::ANY_VARIABLE, context, "");
+          node.name, gd::EventsCodeGenerator::ANY_VARIABLE, context, "", node.child != nullptr);
       if (node.child) node.child->Visit(*this);
       output += codeGenerator.GenerateVariableValueAs(type);
     }, [&]() {
@@ -184,8 +186,9 @@ void ExpressionCodeGenerator::OnVisitVariableAccessorNode(
     VariableAccessorNode& node) {
     if (!objectNameToUseForVariableAccessor.empty()) {
       // Use the name of the object passed by the parent, as we need both to access an object variable.
-      output += codeGenerator.GenerateGetVariable(node.name,
-          gd::EventsCodeGenerator::OBJECT_VARIABLE, context, objectNameToUseForVariableAccessor);
+      output += codeGenerator.GenerateGetVariable(
+          node.name, gd::EventsCodeGenerator::OBJECT_VARIABLE, context,
+          objectNameToUseForVariableAccessor, node.child != nullptr);
 
       // We have accessed an object variable, from now we can continue accessing the child variables
       // (including using the bracket notation).
@@ -222,24 +225,27 @@ void ExpressionCodeGenerator::OnVisitIdentifierNode(IdentifierNode& node) {
     output +=
         codeGenerator.GenerateObject(node.identifierName, type, context);
   } else if (gd::ParameterMetadata::IsExpression("variable", type)) {
-      EventsCodeGenerator::VariableScope scope =
+    EventsCodeGenerator::VariableScope scope =
         type == "variable"
             ? gd::EventsCodeGenerator::ANY_VARIABLE
-        : type == "globalvar"
-              ? gd::EventsCodeGenerator::PROJECT_VARIABLE
-              : type == "scenevar"
-                    ? gd::EventsCodeGenerator::LAYOUT_VARIABLE
-                    : gd::EventsCodeGenerator::OBJECT_VARIABLE;
+        : type == "variableOrProperty"
+            ? gd::EventsCodeGenerator::VARIABLE_OR_PROPERTY
+        : type == "variableOrPropertyOrParameter"
+            ? gd::EventsCodeGenerator::VARIABLE_OR_PROPERTY_OR_PARAMETER
+        : type == "globalvar" ? gd::EventsCodeGenerator::PROJECT_VARIABLE
+        : type == "scenevar"  ? gd::EventsCodeGenerator::LAYOUT_VARIABLE
+                              : gd::EventsCodeGenerator::OBJECT_VARIABLE;
 
-      auto objectName = gd::ExpressionVariableOwnerFinder::GetObjectName(codeGenerator.GetPlatform(),
-                                            codeGenerator.GetObjectsContainersList(),
-                                            rootObjectName,
-                                            node);
-      output += codeGenerator.GenerateGetVariable(
-          node.identifierName, scope, context, objectName);
-      if (!node.childIdentifierName.empty()) {
-        output += codeGenerator.GenerateVariableAccessor(node.childIdentifierName);
-      }
+    auto objectName = gd::ExpressionVariableOwnerFinder::GetObjectName(
+        codeGenerator.GetPlatform(), codeGenerator.GetObjectsContainersList(),
+        rootObjectName, node);
+    output += codeGenerator.GenerateGetVariable(
+        node.identifierName, scope, context, objectName,
+        !node.childIdentifierName.empty());
+    if (!node.childIdentifierName.empty()) {
+      output +=
+          codeGenerator.GenerateVariableAccessor(node.childIdentifierName);
+    }
   } else {
     const auto& variablesContainersList = codeGenerator.GetProjectScopedContainers().GetVariablesContainersList();
     const auto& propertiesContainersList = codeGenerator.GetProjectScopedContainers().GetPropertiesContainersList();
@@ -249,12 +255,13 @@ void ExpressionCodeGenerator::OnVisitIdentifierNode(IdentifierNode& node) {
     codeGenerator.GetProjectScopedContainers().MatchIdentifierWithName<void>(node.identifierName, [&]() {
       // Generate the code to access the object variable.
       output += codeGenerator.GenerateGetVariable(
-        node.childIdentifierName, gd::EventsCodeGenerator::OBJECT_VARIABLE, context, node.identifierName);
+          node.childIdentifierName, gd::EventsCodeGenerator::OBJECT_VARIABLE,
+          context, node.identifierName, !node.childIdentifierName.empty());
       output += codeGenerator.GenerateVariableValueAs(type);
     }, [&]() {
       output += codeGenerator.GenerateGetVariable(
-          node.identifierName, gd::EventsCodeGenerator::ANY_VARIABLE, context,
-          "");
+          node.identifierName, gd::EventsCodeGenerator::VARIABLE_OR_PROPERTY_OR_PARAMETER, context,
+          "", !node.childIdentifierName.empty());
       if (!node.childIdentifierName.empty()) {
         output += codeGenerator.GenerateVariableAccessor(node.childIdentifierName);
       }

Core/GDCore/Events/Event.cpp

@@ -18,8 +18,6 @@ namespace gd {
 
 EventsList BaseEvent::badSubEvents;
 VariablesContainer BaseEvent::badLocalVariables;
-std::vector<gd::String> BaseEvent::emptyDependencies;
-gd::String BaseEvent::emptySourceFile;
 
 BaseEvent::BaseEvent()
     : totalTimeDuringLastSession(0),

Core/GDCore/Events/Event.h

@@ -175,26 +175,6 @@ class GD_CORE_API BaseEvent {
         noExpr;
     return noExpr;
   };
-
-  /**
-   * \brief Returns the dependencies on source files of the project.
-   * \note Default implementation returns an empty list of dependencies. This is
-   * fine for most events that are not related to adding custom user source
-   * code.
-   */
-  virtual const std::vector<gd::String>& GetSourceFileDependencies() const {
-    return emptyDependencies;
-  };
-
-  /**
-   * \brief Returns the name of the source file associated with the event
-   * \note Default implementation returns an empty string. This is fine for most
-   * events that are not related to adding custom user source code.
-   */
-  virtual const gd::String& GetAssociatedGDManagedSourceFile(
-      gd::Project& project) const {
-    return emptySourceFile;
-  };
   ///@}
 
   /** \name Code generation
@@ -327,8 +307,6 @@ class GD_CORE_API BaseEvent {
 
   static gd::EventsList badSubEvents;
   static gd::VariablesContainer badLocalVariables;
-  static std::vector<gd::String> emptyDependencies;
-  static gd::String emptySourceFile;
 };
 
 /**

Core/GDCore/Events/Parsers/ExpressionParser2Node.h

@@ -36,8 +36,8 @@ struct GD_CORE_API ExpressionParserLocation {
 
  private:
   bool isValid;
-  size_t startPosition;
-  size_t endPosition;
+  size_t startPosition = 0;
+  size_t endPosition = 0;
 };
 
 /**

Core/GDCore/Extensions/Builtin/BaseObjectExtension.cpp

@@ -1768,6 +1768,22 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .AddParameter("expression",
                     _("Angle of tolerance, in degrees (0: minimum tolerance)"))
       .AddCodeOnlyParameter("conditionInverted", "")
+      .SetHidden()
+      .MarkAsAdvanced();
+
+  extension
+      .AddCondition("IsTurnedTowardObject",
+                    _("An object is turned toward another"),
+                    _("Check if an object is turned toward another"),
+                    _("_PARAM0_ is turned toward _PARAM1_ ± _PARAM2_°"),
+                    _("Angle"),
+                    "res/conditions/estTourne24.png",
+                    "res/conditions/estTourne.png")
+      .AddParameter("objectList", _("Name of the object"))
+      .AddParameter("objectList", _("Name of the second object"))
+      .AddParameter("expression",
+                    _("Angle of tolerance, in degrees (0: minimum tolerance)"))
+      .AddCodeOnlyParameter("conditionInverted", "")
       .MarkAsAdvanced();
 
   extension

Core/GDCore/Extensions/Builtin/KeyboardExtension.cpp

@@ -35,7 +35,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsKeyboardExtension(
                     "res/conditions/keyboard24.png",
                     "res/conditions/keyboard.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("key", _("Key"));
+      .AddParameter("key", _("Key to check"))
+      .SetHidden();
 
   extension
       .AddCondition("KeyReleased",
@@ -46,33 +47,32 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsKeyboardExtension(
                     "res/conditions/keyboard24.png",
                     "res/conditions/keyboard.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("key", _("Key"));
+      .AddParameter("key", _("Key to check"))
+      .SetHidden();
 
   extension
       .AddCondition("KeyFromTextPressed",
-                    _("Key pressed (text expression)"),
-                    _("Check if a key, retrieved from the result of the "
-                      "expression, is pressed"),
+                    _("Key pressed"),
+                    _("Check if a key is pressed"),
                     _("_PARAM1_ key is pressed"),
                     "",
                     "res/conditions/keyboard24.png",
                     "res/conditions/keyboard.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("string", _("Expression generating the key to check"))
-      .MarkAsAdvanced();
+      .AddParameter("keyboardKey", _("Key to check"))
+      .MarkAsSimple();
 
   extension
       .AddCondition("KeyFromTextReleased",
-                    _("Key released (text expression)"),
-                    _("Check if a key, retrieved from the result of the "
-                      "expression, was just released"),
+                    _("Key released"),
+                    _("Check if a key was just released"),
                     _("_PARAM1_ key is released"),
                     "",
                     "res/conditions/keyboard24.png",
                     "res/conditions/keyboard.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("string", _("Expression generating the key to check"))
-      .MarkAsAdvanced();
+      .AddParameter("keyboardKey", _("Key to check"))
+      .MarkAsSimple();
 
   extension
       .AddCondition("AnyKeyPressed",

Core/GDCore/Extensions/Builtin/MouseExtension.cpp

@@ -252,7 +252,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsMouseExtension(
                     "res/conditions/mouse.png")
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("mouse", _("Button to check"))
-      .MarkAsSimple();
+      .MarkAsSimple()
+      .SetHidden();
 
   // Support for deprecated names:
   extension.AddDuplicatedCondition("SourisBouton", "MouseButtonPressed")
@@ -262,49 +263,41 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsMouseExtension(
       .AddCondition("MouseButtonReleased",
                     _("Mouse button released"),
                     _("Check if the specified mouse button was released."),
-                    _("_PARAM1_ mouse button was released"),
+                    _("Touch or _PARAM1_ mouse button is released"),
                     "",
                     "res/conditions/mouse24.png",
                     "res/conditions/mouse.png")
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("mouse", _("Button to check"))
-      .MarkAsSimple();
+      .MarkAsSimple()
+      .SetHidden();
 
   extension
       .AddCondition(
           "MouseButtonFromTextPressed",
-          _("Mouse button pressed or touch held (text expression)"),
-          _("Check if a mouse button, retrieved from the result of the "
-            "expression, is pressed."),
-          _("_PARAM1_ mouse button is pressed"),
+          _("Mouse button pressed or touch held"),
+          _("Check if the specified mouse button is pressed or "
+              "if a touch is in contact with the screen."),
+          _("Touch or _PARAM1_ mouse button is down"),
           "",
           "res/conditions/mouse24.png",
           "res/conditions/mouse.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("stringWithSelector",
-                    _("Expression generating the mouse button to check"),
-                    "[\"Left\", \"Right\", \"Middle\"]")
-      .SetParameterLongDescription(
-          _("Possible values are Left, Right and Middle."))
-      .MarkAsAdvanced();
+      .AddParameter("mouseButton", _("Button to check"))
+      .MarkAsSimple();
 
   extension
       .AddCondition(
           "MouseButtonFromTextReleased",
-          _("Mouse button released (text expression)"),
-          _("Check if a mouse button, retrieved from the result of the "
-            "expression, was just released."),
-          _("_PARAM1_ mouse button is released"),
+          _("Mouse button released"),
+          _("Check if the specified mouse button was released."),
+          _("Touch or _PARAM1_ mouse button is released"),
           "",
           "res/conditions/mouse24.png",
           "res/conditions/mouse.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("stringWithSelector",
-                    _("Expression generating the mouse button to check"),
-                    "[\"Left\", \"Right\", \"Middle\"]")
-      .SetParameterLongDescription(
-          _("Possible values are Left, Right and Middle."))
-      .MarkAsAdvanced();
+      .AddParameter("mouseButton", _("Button to check"))
+      .MarkAsSimple();
 
   extension
       .AddExpressionAndCondition("number",
@@ -338,6 +331,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsMouseExtension(
       .AddParameter("expression", _("Camera number (default : 0)"), "", true)
       .SetDefaultValue("0");
 
+  // Deprecated
   extension
       .AddCondition(
           "PopStartedTouch",
@@ -354,6 +348,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsMouseExtension(
       .AddCodeOnlyParameter("currentScene", "")
       .SetHidden();
 
+  // Deprecated
   extension
       .AddCondition(
           "PopEndedTouch",
@@ -370,6 +365,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsMouseExtension(
       .AddCodeOnlyParameter("currentScene", "")
       .SetHidden();
 
+  // Deprecated
   extension
       .AddCondition(
           "HasAnyTouchStarted",

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

@@ -33,6 +33,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                                      "most elements of a game."),
                                    "CppPlatform/Extensions/spriteicon.png")
           .SetCategoryFullName(_("General"))
+          .SetOpenFullEditorLabel(_("Edit animations"))
           .AddDefaultBehavior("EffectCapability::EffectBehavior")
           .AddDefaultBehavior("ResizableCapability::ResizableBehavior")
           .AddDefaultBehavior("ScalableCapability::ScalableBehavior")

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

@@ -47,19 +47,11 @@ void SpriteObject::DoSerializeTo(gd::SerializerElement& element) const {
 std::map<gd::String, gd::PropertyDescriptor> SpriteObject::GetProperties()
     const {
   std::map<gd::String, gd::PropertyDescriptor> properties;
-  properties[_("Animate even if hidden or far from the screen")]
-      .SetValue(updateIfNotVisible ? "true" : "false")
-      .SetType("Boolean");
-  properties["PLEASE_ALSO_SHOW_EDIT_BUTTON_THANKS"].SetValue("");
-
   return properties;
 }
 
 bool SpriteObject::UpdateProperty(const gd::String& name,
                                   const gd::String& value) {
-  if (name == _("Animate even if hidden or far from the screen"))
-    updateIfNotVisible = value == "1";
-
   return true;
 }
 

Core/GDCore/Extensions/Builtin/VariablesExtension.cpp

@@ -33,7 +33,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
                     "",
                     "res/conditions/var24.png",
                     "res/conditions/var.png")
-      .AddParameter("variable", _("Variable"))
+      .AddParameter("variableOrPropertyOrParameter", _("Variable"))
       .UseStandardRelationalOperatorParameters(
           "number", ParameterOptions::MakeNewOptions());
 
@@ -45,7 +45,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
                     "",
                     "res/conditions/var24.png",
                     "res/conditions/var.png")
-      .AddParameter("variable", _("Variable"))
+      .AddParameter("variableOrPropertyOrParameter", _("Variable"))
       .UseStandardRelationalOperatorParameters(
           "string", ParameterOptions::MakeNewOptions());
 
@@ -58,7 +58,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
           "",
           "res/conditions/var24.png",
           "res/conditions/var.png")
-      .AddParameter("variable", _("Variable"))
+      .AddParameter("variableOrPropertyOrParameter", _("Variable"))
       .AddParameter("trueorfalse", _("Check if the value is"))
       .SetDefaultValue("true")
       // This parameter allows to keep the operand expression
@@ -73,7 +73,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
                  "",
                  "res/actions/var24.png",
                  "res/actions/var.png")
-      .AddParameter("variable", _("Variable"))
+      .AddParameter("variableOrProperty", _("Variable"))
       .UseStandardOperatorParameters("number",
                                      ParameterOptions::MakeNewOptions());
 
@@ -85,7 +85,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
                  "",
                  "res/actions/var24.png",
                  "res/actions/var.png")
-      .AddParameter("variable", _("Variable"))
+      .AddParameter("variableOrProperty", _("Variable"))
       .UseStandardOperatorParameters("string",
                                      ParameterOptions::MakeNewOptions());
 
@@ -98,7 +98,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
           "",
           "res/conditions/var24.png",
           "res/conditions/var.png")
-      .AddParameter("variable", _("Variable"))
+      .AddParameter("variableOrProperty", _("Variable"))
       .AddParameter("operator", _("Value"), "boolean")
       // This parameter allows to keep the operand expression
       // when the editor switch between variable instructions.

Core/GDCore/Extensions/Metadata/BehaviorMetadata.cpp

@@ -37,8 +37,7 @@ BehaviorMetadata::BehaviorMetadata(
       className(className_),
       iconFilename(icon24x24),
       instance(instance_),
-      sharedDatasInstance(sharedDatasInstance_),
-      quickCustomizationVisibility(QuickCustomization::Visibility::Default) {
+      sharedDatasInstance(sharedDatasInstance_) {
   SetFullName(gd::String(fullname_));
   SetDescription(gd::String(description_));
   SetDefaultName(gd::String(defaultName_));
@@ -441,12 +440,18 @@ std::map<gd::String, gd::PropertyDescriptor> BehaviorMetadata::GetSharedProperti
 
 const std::vector<gd::String>& BehaviorMetadata::GetRequiredBehaviorTypes() const {
   requiredBehaviors.clear();
-  for (auto& property : Get().GetProperties()) {
+  if (!instance) {
+    return requiredBehaviors;
+  }
+  for (auto& property : instance->GetProperties()) {
     const String& propertyName = property.first;
     const gd::PropertyDescriptor& propertyDescriptor = property.second;
 
     if (propertyDescriptor.GetType() == "Behavior") {
-      requiredBehaviors.push_back(propertyDescriptor.GetExtraInfo()[0]);
+      const auto& extraInfos = propertyDescriptor.GetExtraInfo();
+      if (extraInfos.size() > 0) {
+        requiredBehaviors.push_back(extraInfos[0]);
+      }
     }
   }
   return requiredBehaviors;

Core/GDCore/Extensions/Metadata/BehaviorMetadata.h

@@ -272,7 +272,7 @@ class GD_CORE_API BehaviorMetadata : public InstructionOrExpressionContainerMeta
    * Check if the behavior is private - it can't be used outside of its
    * extension.
    */
-  bool IsPrivate() const { return isPrivate; }
+  bool IsPrivate() const override { return isPrivate; }
 
   /**
    * Set that the behavior is private - it can't be used outside of its
@@ -307,6 +307,15 @@ class GD_CORE_API BehaviorMetadata : public InstructionOrExpressionContainerMeta
     return *this;
   }
 
+  BehaviorMetadata &SetOpenFullEditorLabel(const gd::String& label) {
+    openFullEditorLabel = label;
+    return *this;
+  }
+
+  const gd::String& GetOpenFullEditorLabel() const {
+    return openFullEditorLabel;
+  }
+
   /**
    * \brief Return the associated gd::Behavior, handling behavior contents.
    *
@@ -384,7 +393,8 @@ class GD_CORE_API BehaviorMetadata : public InstructionOrExpressionContainerMeta
   mutable std::vector<gd::String> requiredBehaviors;
   bool isPrivate = false;
   bool isHidden = false;
-  QuickCustomization::Visibility quickCustomizationVisibility;
+  gd::String openFullEditorLabel;
+  QuickCustomization::Visibility quickCustomizationVisibility = QuickCustomization::Visibility::Default;
 
   // TODO: Nitpicking: convert these to std::unique_ptr to clarify ownership.
   std::shared_ptr<gd::Behavior> instance;

Core/GDCore/Extensions/Metadata/EffectMetadata.h

@@ -185,10 +185,10 @@ class GD_CORE_API EffectMetadata {
   gd::String fullname;
   gd::String description;
   std::vector<gd::String> includeFiles;
-  bool isMarkedAsNotWorkingForObjects;
-  bool isMarkedAsOnlyWorkingFor2D;
-  bool isMarkedAsOnlyWorkingFor3D;
-  bool isMarkedAsUnique;
+  bool isMarkedAsNotWorkingForObjects = false;
+  bool isMarkedAsOnlyWorkingFor2D = false;
+  bool isMarkedAsOnlyWorkingFor3D = false;
+  bool isMarkedAsUnique = false;
   std::map<gd::String, gd::PropertyDescriptor> properties;
 };
 

Core/GDCore/Extensions/Metadata/EventMetadata.cpp

@@ -19,7 +19,8 @@ EventMetadata::EventMetadata(const gd::String &name_,
     : fullname(fullname_),
       description(description_),
       group(group_),
-      instance(instance_) {
+      instance(instance_),
+      hasCustomCodeGenerator(false) {
   ClearCodeGenerationAndPreprocessing();
   if (instance) instance->SetType(name_);
 }

Core/GDCore/Extensions/Metadata/EventMetadata.h

@@ -83,7 +83,7 @@ class GD_CORE_API EventMetadata {
   gd::String group;
 
   std::shared_ptr<gd::BaseEvent> instance;
-  bool hasCustomCodeGenerator;
+  bool hasCustomCodeGenerator = false;
   std::function<gd::String(gd::BaseEvent& event,
                            gd::EventsCodeGenerator& codeGenerator,
                            gd::EventsCodeGenerationContext& context)>

Core/GDCore/Extensions/Metadata/InstructionOrExpressionContainerMetadata.h

@@ -174,6 +174,7 @@ public:
   virtual const gd::String &GetFullName() const = 0;
   virtual const gd::String &GetDescription() const = 0;
   virtual const gd::String &GetIconFilename() const = 0;
+  virtual bool IsPrivate() const = 0;
 
   /**
    * \brief Return a reference to a map containing the names of the actions

Core/GDCore/Extensions/Metadata/MetadataProvider.h

@@ -288,8 +288,8 @@ class GD_CORE_API MetadataProvider {
   static EffectMetadata badEffectMetadata;
   static gd::InstructionMetadata badInstructionMetadata;
   static gd::ExpressionMetadata badExpressionMetadata;
-  int useless;  // Useless member to avoid emscripten "must have a positive
-                // integer typeid pointer" runtime error.
+  int useless = 0;  // Useless member to avoid emscripten "must have a positive
+                    // integer typeid pointer" runtime error.
 };
 
 }  // namespace gd

Core/GDCore/Extensions/Metadata/ObjectMetadata.cpp

@@ -46,30 +46,25 @@ ObjectMetadata::ObjectMetadata(const gd::String& extensionNamespace_,
                                const gd::String& fullname_,
                                const gd::String& description_,
                                const gd::String& icon24x24)
-    : ObjectMetadata(extensionNamespace_,
-                     name_,
-                     fullname_,
-                     description_,
-                     icon24x24,
-                     []() -> std::unique_ptr<gd::ObjectConfiguration> {
-      gd::LogFatalError(
-          "Error: Event-based objects don't have blueprint. "
-          "This method should not never be called.");
-      return nullptr;
-    }) {}
+    : name(name_),
+      iconFilename(icon24x24),
+      extensionNamespace(extensionNamespace_) {
+  SetFullName(gd::String(fullname_));
+  SetDescription(gd::String(description_));
+}
 
 ObjectMetadata::ObjectMetadata(const gd::String& extensionNamespace_,
                                const gd::String& name_,
                                const gd::String& fullname_,
                                const gd::String& description_,
                                const gd::String& icon24x24,
-                               CreateFunPtr createFunPtrP)
-    : name(name_),
-      iconFilename(icon24x24),
-      createFunPtr(createFunPtrP),
-      extensionNamespace(extensionNamespace_) {
-  SetFullName(gd::String(fullname_));
-  SetDescription(gd::String(description_));
+                               CreateFunPtr createFunPtr_)
+    : ObjectMetadata(extensionNamespace_,
+                     name_,
+                     fullname_,
+                     description_,
+                     icon24x24) {
+  createFunPtr = createFunPtr_;
 }
 
 gd::InstructionMetadata& ObjectMetadata::AddCondition(

Core/GDCore/Extensions/Metadata/ObjectMetadata.h

@@ -39,6 +39,8 @@ class GD_CORE_API ObjectMetadata : public InstructionOrExpressionContainerMetada
   /**
    * \brief Construct an object metadata, using a "blueprint" object that will
    * be copied when a new object is requested.
+   *
+   * \note This is used for objects declared in JavaScript extensions.
    */
   ObjectMetadata(const gd::String& extensionNamespace_,
                  const gd::String& name_,
@@ -47,9 +49,9 @@ class GD_CORE_API ObjectMetadata : public InstructionOrExpressionContainerMetada
                  const gd::String& icon24x24_,
                  std::shared_ptr<gd::ObjectConfiguration> blueprintObject_);
   /**
-   * \brief Construct an object metadata, without "blueprint" object
+   * \brief Construct an object metadata.
    *
-   * \note This is used by events based objects.
+   * \note This is used by events based objects ("custom objects").
    */
   ObjectMetadata(const gd::String& extensionNamespace_,
                  const gd::String& name_,
@@ -60,14 +62,17 @@ class GD_CORE_API ObjectMetadata : public InstructionOrExpressionContainerMetada
   /**
    * \brief Construct an object metadata, with a function that will be called
    * to instantiate a new object.
+   *
+   * \note This is used for objects declared in C++ extensions.
    */
   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) {}
+                 CreateFunPtr createFunPtr_);
+
+  ObjectMetadata() {}
   virtual ~ObjectMetadata(){};
 
   /**
@@ -246,6 +251,11 @@ class GD_CORE_API ObjectMetadata : public InstructionOrExpressionContainerMetada
     return *this;
   }
 
+  ObjectMetadata& ResetDefaultBehaviorsJustForTesting() {
+    defaultBehaviorTypes.clear();
+    return *this;
+  }
+
   const gd::String& GetName() const override { return name; }
   const gd::String& GetFullName() const override { return fullname; }
   const gd::String& GetCategoryFullName() const { return categoryFullName; }
@@ -295,6 +305,22 @@ class GD_CORE_API ObjectMetadata : public InstructionOrExpressionContainerMetada
    */
   std::map<gd::String, gd::ExpressionMetadata>& GetAllStrExpressions() override { return strExpressionsInfos; };
 
+
+  /**
+   * Check if the behavior is private - it can't be used outside of its
+   * extension.
+   */
+  bool IsPrivate() const override { return isPrivate; }
+
+  /**
+   * Set that the behavior is private - it can't be used outside of its
+   * extension.
+   */
+  ObjectMetadata &SetPrivate() {
+    isPrivate = true;
+    return *this;
+  }
+
   /**
    * \brief Set the object to be hidden in the IDE.
    *
@@ -323,6 +349,15 @@ class GD_CORE_API ObjectMetadata : public InstructionOrExpressionContainerMetada
    */
   bool IsRenderedIn3D() const { return isRenderedIn3D; }
 
+  ObjectMetadata &SetOpenFullEditorLabel(const gd::String& label) {
+    openFullEditorLabel = label;
+    return *this;
+  }
+
+  const gd::String& GetOpenFullEditorLabel() const {
+    return openFullEditorLabel;
+  }
+
   std::map<gd::String, gd::InstructionMetadata> conditionsInfos;
   std::map<gd::String, gd::InstructionMetadata> actionsInfos;
   std::map<gd::String, gd::ExpressionMetadata> expressionsInfos;
@@ -330,7 +365,7 @@ class GD_CORE_API ObjectMetadata : public InstructionOrExpressionContainerMetada
 
   std::vector<gd::String> includeFiles;
   gd::String className;
-  CreateFunPtr createFunPtr;
+  CreateFunPtr createFunPtr = nullptr;
 
  private:
   gd::String extensionNamespace;
@@ -342,8 +377,10 @@ class GD_CORE_API ObjectMetadata : public InstructionOrExpressionContainerMetada
   gd::String iconFilename;
   gd::String categoryFullName;
   std::set<gd::String> defaultBehaviorTypes;
+  bool isPrivate = false;
   bool hidden = false;
   bool isRenderedIn3D = false;
+  gd::String openFullEditorLabel;
 
   std::shared_ptr<gd::ObjectConfiguration>
       blueprintObject;  ///< The "blueprint" object to be copied when a new

Core/GDCore/Extensions/Metadata/ParameterMetadataTools.cpp

@@ -6,6 +6,8 @@
 #include "ParameterMetadataTools.h"
 
 #include "GDCore/Events/Expression.h"
+#include "GDCore/Events/Parsers/ExpressionParser2.h"
+#include "GDCore/Events/Parsers/ExpressionParser2NodePrinter.h"
 #include "GDCore/Project/Object.h"
 #include "GDCore/Project/ObjectsContainer.h"
 #include "GDCore/Project/ObjectsContainersList.h"
@@ -13,8 +15,6 @@
 #include "GDCore/Project/Project.h"
 #include "GDCore/String.h"
 #include "InstructionMetadata.h"
-#include "GDCore/Events/Parsers/ExpressionParser2.h"
-#include "GDCore/Events/Parsers/ExpressionParser2NodePrinter.h"
 
 namespace gd {
 const ParameterMetadata ParameterMetadataTools::badParameterMetadata;
@@ -23,42 +23,109 @@ void ParameterMetadataTools::ParametersToObjectsContainer(
     const gd::Project& project,
     const ParameterMetadataContainer& parameters,
     gd::ObjectsContainer& outputObjectsContainer) {
-  outputObjectsContainer.GetObjects().clear();
+  // Keep track of all objects and their behaviors names, so we can remove
+  // those who are in the container but not in the parameters anymore.
+  std::set<gd::String> allObjectNames;
+  std::map<gd::String, std::set<gd::String>> allObjectNonDefaultBehaviorNames;
 
   gd::String lastObjectName;
   for (std::size_t i = 0; i < parameters.GetParametersCount(); ++i) {
     const auto& parameter = parameters.GetParameter(i);
     if (parameter.GetName().empty()) continue;
 
-    if (gd::ParameterMetadata::IsObject(parameter.GetType())) {
-      outputObjectsContainer.InsertNewObject(
-          project,
-          parameter.GetExtraInfo(),
-          parameter.GetName(),
-          outputObjectsContainer.GetObjectsCount());
+    auto &valueTypeMetadata = parameter.GetValueTypeMetadata();
+    if (valueTypeMetadata.IsObject()) {
+      const gd::String& objectName = parameter.GetName();
+      const gd::String& objectType = parameter.GetExtraInfo();
+      allObjectNames.insert(objectName);
+
+      // Check if we can keep the existing object.
+      if (outputObjectsContainer.HasObjectNamed(objectName)) {
+        const gd::Object& object = outputObjectsContainer.GetObject(objectName);
+
+        if (object.GetType() != objectType) {
+          // Object type has changed, remove it so it is re-created.
+          outputObjectsContainer.RemoveObject(objectName);
+        }
+      }
+
+      if (outputObjectsContainer.HasObjectNamed(objectName)) {
+        // Keep the existing object, ensure the default behaviors
+        // are all present (and no more than required by the object type).
+        // Non default behaviors coming from parameters will be added or removed later.
+        project.EnsureObjectDefaultBehaviors(outputObjectsContainer.GetObject(objectName));
+      } else {
+        // Create a new object (and its default behaviors) if needed.
+        outputObjectsContainer.InsertNewObject(
+            project,
+            objectType,
+            objectName,
+            outputObjectsContainer.GetObjectsCount());
+      }
 
       // Memorize the last object name. By convention, parameters that require
       // an object (mainly, "objectvar" and "behavior") should be placed after
       // the object in the list of parameters (if possible, just after).
       // Search "lastObjectName" in the codebase for other place where this
       // convention is enforced.
-      lastObjectName = parameter.GetName();
-    } else if (gd::ParameterMetadata::IsBehavior(parameter.GetType())) {
+      lastObjectName = objectName;
+    } else if (valueTypeMetadata.IsBehavior()) {
       if (!lastObjectName.empty()) {
         if (outputObjectsContainer.HasObjectNamed(lastObjectName)) {
-          const gd::Object& object =
-              outputObjectsContainer.GetObject(lastObjectName);
-          gd::String behaviorName = parameter.GetName();
+          const gd::String& behaviorName = parameter.GetName();
+          const gd::String& behaviorType = parameter.GetExtraInfo();
+
+          gd::Object& object = outputObjectsContainer.GetObject(lastObjectName);
+          allObjectNonDefaultBehaviorNames[lastObjectName].insert(behaviorName);
+
+          // Check if we can keep the existing behavior.
+          if (object.HasBehaviorNamed(behaviorName)) {
+            if (object.GetBehavior(behaviorName).GetTypeName() !=
+                behaviorType) {
+              // Behavior type has changed, remove it so it is re-created.
+              object.RemoveBehavior(behaviorName);
+            }
+          }
 
           if (!object.HasBehaviorNamed(behaviorName)) {
-            outputObjectsContainer.GetObject(lastObjectName)
-                .AddNewBehavior(
-                    project, parameter.GetExtraInfo(), behaviorName);
+            object.AddNewBehavior(
+                project, parameter.GetExtraInfo(), behaviorName);
           }
         }
       }
     }
   }
+
+  // Remove objects that are not in the parameters anymore.
+  std::set<gd::String> objectNamesInContainer =
+      outputObjectsContainer.GetAllObjectNames();
+  for (const auto& objectName : objectNamesInContainer) {
+    if (allObjectNames.find(objectName) == allObjectNames.end()) {
+      outputObjectsContainer.RemoveObject(objectName);
+    }
+  }
+
+  // Remove behaviors of objects that are not in the parameters anymore.
+  for (const auto& objectName : allObjectNames) {
+    if (!outputObjectsContainer.HasObjectNamed(objectName)) {
+      // Should not happen.
+      continue;
+    }
+
+    auto& object = outputObjectsContainer.GetObject(objectName);
+    const auto& allBehaviorNames = allObjectNonDefaultBehaviorNames[objectName];
+    for (const auto& behaviorName : object.GetAllBehaviorNames()) {
+      if (object.GetBehavior(behaviorName).IsDefaultBehavior()) {
+        // Default behaviors are already ensured to be all present
+        // (and no more than required by the object type).
+        continue;
+      }
+
+      if (allBehaviorNames.find(behaviorName) == allBehaviorNames.end()) {
+        object.RemoveBehavior(behaviorName);
+      }
+    }
+  }
 }
 
 void ParameterMetadataTools::ForEachParameterMatchingSearch(

Core/GDCore/Extensions/Metadata/SourceFileMetadata.h

@@ -0,0 +1,56 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#pragma once
+#include "GDCore/String.h"
+#include "GDCore/Serialization/SerializerElement.h"
+
+namespace gd {
+/**
+ * \brief Contains information about a source file that must be included
+ * when an extension is used.
+ */
+class GD_CORE_API SourceFileMetadata {
+ public:
+  /**
+   * Construct a new dependency metadata, though you probably want to call
+   * `AddSourceFile` on gd::PlatformExtension.
+   *
+   * \see gd::PlatformExtension
+   */
+  SourceFileMetadata() {};
+
+  SourceFileMetadata& SetResourceName(const gd::String& resourceName_) {
+    resourceName = resourceName_;
+    return *this;
+  };
+
+  SourceFileMetadata& SetIncludePosition(const gd::String& includePosition_) {
+    includePosition = includePosition_;
+    return *this;
+  };
+
+  const gd::String& GetResourceName() const { return resourceName; };
+
+  gd::String& GetResourceName() { return resourceName; };
+
+  const gd::String& GetIncludePosition() const { return includePosition; };
+
+  void SerializeTo(SerializerElement& element) const {
+    element.AddChild("resourceName").SetStringValue(resourceName);
+    element.AddChild("includePosition").SetStringValue(includePosition);
+  }
+
+  void UnserializeFrom(const SerializerElement& element) {
+    resourceName = element.GetStringAttribute("resourceName");
+    includePosition = element.GetStringAttribute("includePosition", "last");
+  }
+
+ private:
+  gd::String resourceName;  ///< The name of the resource in the project.
+  gd::String includePosition = "last";  ///< "first" or "last".
+};
+
+}  // namespace gd

Core/GDCore/Extensions/Metadata/ValueTypeMetadata.cpp

@@ -53,27 +53,34 @@ const gd::String &ValueTypeMetadata::GetExpressionPrimitiveValueType(
 
 const gd::String &
 ValueTypeMetadata::GetPrimitiveValueType(const gd::String &parameterType) {
-  if (parameterType == "variable" ||
-      gd::ValueTypeMetadata::IsTypeExpression("variable", parameterType)) {
-    return ValueTypeMetadata::variableType;
+  if (parameterType == "number" ||
+      gd::ValueTypeMetadata::IsTypeValue("number", parameterType)) {
+    return ValueTypeMetadata::numberType;
   }
-  if (parameterType == "boolean" || parameterType == "yesorno" ||
-      parameterType == "trueorfalse") {
-    return ValueTypeMetadata::booleanType;
-  }
-  // These 2 types are not strings from the code generator point of view,
-  // but it is for event-based extensions.
-  if (parameterType == "key" || parameterType == "mouse") {
+  if (parameterType == "string" ||
+      gd::ValueTypeMetadata::IsTypeValue("string", parameterType)) {
     return ValueTypeMetadata::stringType;
   }
-  return GetExpressionPrimitiveValueType(parameterType);
+  if (parameterType == "variable" ||
+      gd::ValueTypeMetadata::IsTypeValue("variable", parameterType)) {
+    return ValueTypeMetadata::variableType;
+  }
+  if (parameterType == "boolean" ||
+      gd::ValueTypeMetadata::IsTypeValue("boolean", parameterType)) {
+    return ValueTypeMetadata::booleanType;
+  }
+  return parameterType;
 }
 
 const gd::String ValueTypeMetadata::numberValueType = "number";
 const gd::String ValueTypeMetadata::booleanValueType = "boolean";
+const gd::String ValueTypeMetadata::stringValueType = "string";
 const gd::String ValueTypeMetadata::colorValueType = "color";
 const gd::String ValueTypeMetadata::choiceValueType = "stringWithSelector";
-const gd::String ValueTypeMetadata::stringValueType = "string";
+const gd::String ValueTypeMetadata::behaviorValueType = "behavior";
+const gd::String ValueTypeMetadata::leaderboardIdValueType = "leaderboardId";
+const gd::String ValueTypeMetadata::objectAnimationNameValueType = "objectAnimationName";
+const gd::String ValueTypeMetadata::keyboardKeyValueType = "keyboardKey";
 
 const gd::String &ValueTypeMetadata::ConvertPropertyTypeToValueType(
     const gd::String &propertyType) {
@@ -85,8 +92,16 @@ const gd::String &ValueTypeMetadata::ConvertPropertyTypeToValueType(
     return colorValueType;
   } else if (propertyType == "Choice") {
     return choiceValueType;
+  } else if (propertyType == "Behavior") {
+    return behaviorValueType;
+  } else if (propertyType == "LeaderboardId") {
+    return leaderboardIdValueType;
+  } else if (propertyType == "ObjectAnimationName") {
+    return objectAnimationNameValueType;
+  } else if (propertyType == "KeyboardKey") {
+    return keyboardKeyValueType;
   }
-  // For "String" or default
+  // For "String", "Resource" or default
   return stringValueType;
 };
 

Core/GDCore/Extensions/Metadata/ValueTypeMetadata.h

@@ -111,31 +111,54 @@ class GD_CORE_API ValueTypeMetadata {
    * given type.
    */
   bool IsNumber() const {
-    return gd::ValueTypeMetadata::IsTypeExpression("number", name);
+    return gd::ValueTypeMetadata::IsTypeValue("number", name);
   }
 
   /**
    * \brief Return true if the type is a string.
    */
   bool IsString() const {
-    return gd::ValueTypeMetadata::IsTypeExpression("string", name);
+    return gd::ValueTypeMetadata::IsTypeValue("string", name);
   }
 
   /**
    * \brief Return true if the type is a boolean.
    */
   bool IsBoolean() const {
-    return gd::ValueTypeMetadata::IsTypeExpression("boolean", name);
+    return gd::ValueTypeMetadata::IsTypeValue("boolean", name);
   }
 
   /**
-   * \brief Return true if the type of the parameter is a number.
+   * \brief Return true if the type of the parameter is a variable.
    * \note If you had a new type of parameter, also add it in the IDE (
    * see EventsFunctionParametersEditor, ParameterRenderingService
    * and ExpressionAutocompletion) and in the EventsCodeGenerator.
    */
   bool IsVariable() const {
-    return gd::ValueTypeMetadata::IsTypeExpression("variable", name);
+    return gd::ValueTypeMetadata::IsVariable(name);
+  }
+
+  /**
+   * \brief Return true if the type of the parameter is a variable.
+   * \note If you had a new type of parameter, also add it in the IDE (
+   * see EventsFunctionParametersEditor, ParameterRenderingService
+   * and ExpressionAutocompletion) and in the EventsCodeGenerator.
+   */
+  static bool IsVariable(const gd::String &type) {
+    return gd::ValueTypeMetadata::GetPrimitiveValueType(type) == "variable";
+  }
+
+  /**
+   * \brief Return true if the type of the parameter is a variable and not a
+   * property or a parameter.
+   */
+  bool IsVariableOnly() const {
+      return
+          // Any variable.
+          name == "variable" ||
+          // Old, "pre-scoped" variables:
+          name == "objectvar" || name == "globalvar" ||
+          name == "scenevar";
   }
 
   /**
@@ -175,7 +198,9 @@ class GD_CORE_API ValueTypeMetadata {
   }
 
   /**
-   * \brief Return true if the type is an expression of the given type.
+   * \brief Return true if the type is an expression of the given type from the
+   * caller point of view.
+   *
    * \note If you are adding a new type of parameter, also add it in the IDE (
    * see EventsFunctionParametersEditor, ParameterRenderingService
    * and ExpressionAutocompletion) and in the EventsCodeGenerator.
@@ -186,6 +211,7 @@ class GD_CORE_API ValueTypeMetadata {
       return parameterType == "number" || parameterType == "expression" ||
              parameterType == "camera" || parameterType == "forceMultiplier";
     } else if (type == "string") {
+      // "key" and "mouse" are not mapped her, see GetPrimitiveValueType.
       return parameterType == "string" || parameterType == "layer" ||
              parameterType == "color" || parameterType == "file" ||
              parameterType == "stringWithSelector" ||
@@ -199,15 +225,20 @@ class GD_CORE_API ValueTypeMetadata {
              parameterType == "functionParameterName" ||
              parameterType == "externalLayoutName" ||
              parameterType == "leaderboardId" ||
+             parameterType == "keyboardKey" ||
+             parameterType == "mouseButton" ||
              parameterType == "identifier";
     } else if (type == "boolean") {
       return parameterType == "yesorno" || parameterType == "trueorfalse";
     } else if (type == "variable") {
       return
-             parameterType == "variable" || // Any variable.
-             // Old, "pre-scoped" variables:
-             parameterType == "objectvar" || parameterType == "globalvar" ||
-             parameterType == "scenevar";
+          // Any variable.
+          parameterType == "variable" ||
+          parameterType == "variableOrProperty" ||
+          parameterType == "variableOrPropertyOrParameter" ||
+          // Old, "pre-scoped" variables:
+          parameterType == "objectvar" || parameterType == "globalvar" ||
+          parameterType == "scenevar";
     } else if (type == "resource") {
       return parameterType == "fontResource" ||
              parameterType == "audioResource" ||
@@ -227,6 +258,26 @@ class GD_CORE_API ValueTypeMetadata {
     return false;
   }
 
+  /**
+   * \brief Return true if the type is a value of the given primitive type from
+   * the function events point of view
+   */
+  static bool IsTypeValue(const gd::String &type,
+                           const gd::String &parameterType) {
+    if (gd::ValueTypeMetadata::IsTypeExpression(type, parameterType)) {
+      return true;
+    }
+    // These 2 parameter types are not strings from the outside of a function as
+    // the generator add quote around a text, but from the events inside of the
+    // function the parameter is a string.
+    //
+    // See EventsCodeGenerator::GenerateParameterCodes
+    if (type == "string") {
+      return parameterType == "key" || parameterType == "mouse";
+    }
+    return false;
+  }
+
   /**
    * \brief Return the expression type from the parameter type.
    * Declinations of "number" and "string" types (like "forceMultiplier" or
@@ -278,9 +329,13 @@ class GD_CORE_API ValueTypeMetadata {
 
   static const gd::String numberValueType;
   static const gd::String booleanValueType;
+  static const gd::String stringValueType;
   static const gd::String colorValueType;
   static const gd::String choiceValueType;
-  static const gd::String stringValueType;
+  static const gd::String behaviorValueType;
+  static const gd::String leaderboardIdValueType;
+  static const gd::String objectAnimationNameValueType;
+  static const gd::String keyboardKeyValueType;
 };
 
 }  // namespace gd

Core/GDCore/Extensions/Platform.cpp

@@ -38,12 +38,14 @@ bool Platform::AddExtension(std::shared_ptr<gd::PlatformExtension> extension) {
 
   extensionsLoaded.push_back(extension);
 
-  // Load all creation/destruction functions for objects provided by the
-  // extension
+  // Load all creation functions for objects provided by the
+  // extension.
   vector<gd::String> objectsTypes = extension->GetExtensionObjectsTypes();
   for (std::size_t i = 0; i < objectsTypes.size(); ++i) {
-    creationFunctionTable[objectsTypes[i]] =
-        extension->GetObjectCreationFunctionPtr(objectsTypes[i]);
+    CreateFunPtr createFunPtr = extension->GetObjectCreationFunctionPtr(objectsTypes[i]);
+    if (createFunPtr != nullptr) {
+      creationFunctionTable[objectsTypes[i]] = createFunPtr;
+    }
   }
 
   for (const auto& it :
@@ -62,7 +64,9 @@ void Platform::RemoveExtension(const gd::String& name) {
     if (extension->GetName() == name) {
       vector<gd::String> objectsTypes = extension->GetExtensionObjectsTypes();
       for (std::size_t i = 0; i < objectsTypes.size(); ++i) {
-        creationFunctionTable.erase(objectsTypes[i]);
+        if (creationFunctionTable.find(objectsTypes[i]) != creationFunctionTable.end()) {
+          creationFunctionTable.erase(objectsTypes[i]);
+        }
       }
     }
   }

Core/GDCore/Extensions/PlatformExtension.cpp

@@ -215,6 +215,11 @@ gd::DependencyMetadata& PlatformExtension::AddDependency() {
   return extensionDependenciesMetadata.back();
 }
 
+gd::SourceFileMetadata& PlatformExtension::AddSourceFile() {
+  extensionSourceFilesMetadata.push_back(SourceFileMetadata());
+  return extensionSourceFilesMetadata.back();
+}
+
 gd::ObjectMetadata& PlatformExtension::AddObject(
     const gd::String& name,
     const gd::String& fullname,
@@ -463,10 +468,22 @@ PlatformExtension::GetAllStrExpressions() {
   return strExpressionsInfos;
 }
 
+const std::vector<gd::DependencyMetadata>& PlatformExtension::GetAllDependencies() const {
+  return extensionDependenciesMetadata;
+}
+
 std::vector<gd::DependencyMetadata>& PlatformExtension::GetAllDependencies() {
   return extensionDependenciesMetadata;
 }
 
+const std::vector<gd::SourceFileMetadata>& PlatformExtension::GetAllSourceFiles() const {
+  return extensionSourceFilesMetadata;
+}
+
+std::vector<gd::SourceFileMetadata>& PlatformExtension::GetAllSourceFiles() {
+  return extensionSourceFilesMetadata;
+}
+
 std::map<gd::String, gd::EventMetadata>& PlatformExtension::GetAllEvents() {
   return eventsInfos;
 }
@@ -808,6 +825,24 @@ gd::String PlatformExtension::GetObjectFullType(const gd::String &extensionName,
   return extensionName + separator + objectName;
 }
 
+gd::String PlatformExtension::GetExtensionFromFullObjectType(const gd::String& type) {
+  const auto separatorIndex =
+      type.find(PlatformExtension::GetNamespaceSeparator());
+  if (separatorIndex == std::string::npos) {
+    return "";
+  }
+  return type.substr(0, separatorIndex);
+}
+
+gd::String PlatformExtension::GetObjectNameFromFullObjectType(const gd::String& type) {
+  const auto separatorIndex =
+      type.find(PlatformExtension::GetNamespaceSeparator());
+  if (separatorIndex == std::string::npos) {
+    return "";
+  }
+  return type.substr(separatorIndex + 2);
+}
+
 PlatformExtension::PlatformExtension()
     : deprecated(false), category(_("General")) {}
 

Core/GDCore/Extensions/PlatformExtension.h

@@ -13,6 +13,7 @@
 #include "GDCore/CommonTools.h"
 #include "GDCore/Extensions/Metadata/BehaviorMetadata.h"
 #include "GDCore/Extensions/Metadata/DependencyMetadata.h"
+#include "GDCore/Extensions/Metadata/SourceFileMetadata.h"
 #include "GDCore/Extensions/Metadata/EffectMetadata.h"
 #include "GDCore/Extensions/Metadata/EventMetadata.h"
 #include "GDCore/Extensions/Metadata/InstructionOrExpressionGroupMetadata.h"
@@ -40,8 +41,7 @@ class Object;
 class ObjectConfiguration;
 }  // namespace gd
 
-typedef std::function<std::unique_ptr<gd::ObjectConfiguration>()>
-    CreateFunPtr;
+typedef std::function<std::unique_ptr<gd::ObjectConfiguration>()> CreateFunPtr;
 
 namespace gd {
 
@@ -51,25 +51,25 @@ namespace gd {
  */
 class GD_CORE_API CompilationInfo {
  public:
-  CompilationInfo() : informationCompleted(false){};
-  virtual ~CompilationInfo(){};
+  CompilationInfo() {};
+  virtual ~CompilationInfo() {};
 
-  bool informationCompleted;
+  bool informationCompleted = false;
 
-  bool runtimeOnly;  ///< True if the extension was compiled for a runtime use
-                     ///< only
+  bool runtimeOnly = false;  ///< True if the extension was compiled for a
+                             ///< runtime use only
 
 #if defined(__GNUC__)
-  int gccMajorVersion;
-  int gccMinorVersion;
-  int gccPatchLevel;
+  int gccMajorVersion = 0;
+  int gccMinorVersion = 0;
+  int gccPatchLevel = 0;
 #endif
 
-  int sfmlMajorVersion;
-  int sfmlMinorVersion;
+  int sfmlMajorVersion = 0;
+  int sfmlMinorVersion = 0;
 
   gd::String gdCoreVersion;
-  int sizeOfpInt;
+  int sizeOfpInt = 0;
 };
 
 struct GD_CORE_API DuplicatedInstructionOptions {
@@ -215,6 +215,7 @@ class GD_CORE_API PlatformExtension {
       const gd::String& icon);
 
   gd::DependencyMetadata& AddDependency();
+  gd::SourceFileMetadata& AddSourceFile();
 
   /**
    * \brief Declare a new object as being part of the extension.
@@ -239,11 +240,12 @@ class GD_CORE_API PlatformExtension {
    * \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& icon_,
-                                std::shared_ptr<gd::ObjectConfiguration> instance);
+  gd::ObjectMetadata& AddObject(
+      const gd::String& name_,
+      const gd::String& fullname_,
+      const gd::String& description_,
+      const gd::String& icon_,
+      std::shared_ptr<gd::ObjectConfiguration> instance);
 
   /**
    * \brief Declare a new events based object as being part of the extension.
@@ -253,11 +255,10 @@ class GD_CORE_API PlatformExtension {
    * \param description The user friendly description of the object
    * \param icon The icon of the object.
    */
-  gd::ObjectMetadata& AddEventsBasedObject(
-      const gd::String& name_,
-      const gd::String& fullname_,
-      const gd::String& description_,
-      const gd::String& icon_);
+  gd::ObjectMetadata& AddEventsBasedObject(const gd::String& name_,
+                                           const gd::String& fullname_,
+                                           const gd::String& description_,
+                                           const gd::String& icon_);
 
   /**
    * \brief Declare a new behavior as being part of the extension.
@@ -420,8 +421,7 @@ class GD_CORE_API PlatformExtension {
   PlatformExtension& SetTags(const gd::String& csvTags) {
     tags.clear();
     tags = csvTags.Split(',');
-    for (size_t i = 0; i < tags.size(); i++)
-    {
+    for (size_t i = 0; i < tags.size(); i++) {
       tags[i] = tags[i].Trim().LowerCase();
     }
     return *this;
@@ -554,6 +554,24 @@ class GD_CORE_API PlatformExtension {
    */
   std::vector<gd::DependencyMetadata>& GetAllDependencies();
 
+  /**
+   * \brief Return a reference to a vector containing the metadata of all the
+   * dependencies of the extension.
+   */
+  const std::vector<gd::DependencyMetadata>& GetAllDependencies() const;
+
+  /**
+   * \brief Return a reference to a vector containing the metadata of all the
+   * dependencies of the extension.
+   */
+  std::vector<gd::SourceFileMetadata>& GetAllSourceFiles();
+
+  /**
+   * \brief Return a reference to a vector containing the metadata of all the
+   * dependencies of the extension.
+   */
+  const std::vector<gd::SourceFileMetadata>& GetAllSourceFiles() const;
+
   /**
    * \brief Return a reference to a map containing the names of the actions,
    * related to the object type, and the metadata associated with.
@@ -634,26 +652,30 @@ class GD_CORE_API PlatformExtension {
    */
   static gd::String GetNamespaceSeparator() { return "::"; }
 
-  static gd::String GetEventsFunctionFullType(const gd::String &extensionName,
-                                              const gd::String &functionName);
+  static gd::String GetEventsFunctionFullType(const gd::String& extensionName,
+                                              const gd::String& functionName);
 
-  static gd::String
-  GetBehaviorEventsFunctionFullType(const gd::String &extensionName,
-                                    const gd::String &behaviorName,
-                                    const gd::String &functionName);
+  static gd::String GetBehaviorEventsFunctionFullType(
+      const gd::String& extensionName,
+      const gd::String& behaviorName,
+      const gd::String& functionName);
 
-  static gd::String GetBehaviorFullType(const gd::String &extensionName,
-                                        const gd::String &behaviorName);
+  static gd::String GetBehaviorFullType(const gd::String& extensionName,
+                                        const gd::String& behaviorName);
 
-  static gd::String
-  GetObjectEventsFunctionFullType(const gd::String &extensionName,
-                                  const gd::String &objectName,
-                                  const gd::String &functionName);
+  static gd::String GetObjectEventsFunctionFullType(
+      const gd::String& extensionName,
+      const gd::String& objectName,
+      const gd::String& functionName);
 
-  static gd::String GetObjectFullType(const gd::String &extensionName,
-                                      const gd::String &objectName);
+  static gd::String GetObjectFullType(const gd::String& extensionName,
+                                      const gd::String& objectName);
 
-private:
+  static gd::String GetExtensionFromFullObjectType(const gd::String& type);
+
+  static gd::String GetObjectNameFromFullObjectType(const gd::String& type);
+
+ private:
   /**
    * Set the namespace (the string all actions/conditions/expressions start
    * with).
@@ -668,10 +690,10 @@ private:
   gd::String fullname;      ///< Name displayed to users in the editor.
   gd::String informations;  ///< Description displayed to users in the editor.
   gd::String category;
-  gd::String author;        ///< Author displayed to users in the editor.
-  gd::String license;       ///< License name displayed to users in the editor.
-  bool deprecated;  ///< true if the extension is deprecated and shouldn't be
-                    ///< shown in IDE.
+  gd::String author;   ///< Author displayed to users in the editor.
+  gd::String license;  ///< License name displayed to users in the editor.
+  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.
   gd::String iconUrl;   ///< The URL to the icon to be shown for this extension.
@@ -685,6 +707,7 @@ private:
   std::map<gd::String, gd::ExpressionMetadata> expressionsInfos;
   std::map<gd::String, gd::ExpressionMetadata> strExpressionsInfos;
   std::vector<gd::DependencyMetadata> extensionDependenciesMetadata;
+  std::vector<gd::SourceFileMetadata> extensionSourceFilesMetadata;
   std::map<gd::String, gd::EventMetadata> eventsInfos;
   std::map<gd::String, gd::PropertyDescriptor> extensionPropertiesMetadata;
   std::map<gd::String, InstructionOrExpressionGroupMetadata>

Core/GDCore/Extensions/PlatformExtension.inl

@@ -5,6 +5,8 @@
  * project is released under the MIT License.
  */
 
+// NOLINTBEGIN
+
 #ifndef GDCORE_PLATFORMEXTENSION_INL
 #define GDCORE_PLATFORMEXTENSION_INL
 
@@ -36,3 +38,5 @@ gd::ObjectMetadata& PlatformExtension::AddObject(const gd::String& name,
 }  // namespace gd
 
 #endif
+
+// NOLINTEND

Core/GDCore/IDE/CaptureOptions.cpp

@@ -0,0 +1,18 @@
+/*
+ * 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/CaptureOptions.h"
+
+#include "GDCore/String.h"
+
+using namespace std;
+
+namespace gd {
+
+Screenshot::Screenshot() {}
+
+CaptureOptions::CaptureOptions() {}
+
+}  // namespace gd

Core/GDCore/IDE/CaptureOptions.h

@@ -0,0 +1,50 @@
+#pragma once
+#include <memory>
+#include <vector>
+
+#include "GDCore/String.h"
+
+namespace gd {
+
+class GD_CORE_API Screenshot {
+ public:
+  Screenshot();
+  virtual ~Screenshot() {};
+
+  void SetDelayTimeInSeconds(int delayTimeInMs_) {
+    delayTimeInMs = delayTimeInMs_;
+  }
+  int GetDelayTimeInSeconds() const { return delayTimeInMs; }
+
+  void SetSignedUrl(const gd::String& signedUrl_) { signedUrl = signedUrl_; }
+  const gd::String& GetSignedUrl() const { return signedUrl; }
+
+  void SetPublicUrl(const gd::String& publicUrl_) { publicUrl = publicUrl_; }
+  const gd::String& GetPublicUrl() const { return publicUrl; }
+
+ private:
+  int delayTimeInMs = 0;
+  gd::String signedUrl;
+  gd::String publicUrl;
+};
+
+class GD_CORE_API CaptureOptions {
+ public:
+  CaptureOptions();
+  virtual ~CaptureOptions() {};
+
+  bool IsEmpty() const { return screenshots.empty(); }
+
+  void AddScreenshot(const Screenshot& screenshot) {
+    screenshots.push_back(screenshot);
+  }
+
+  const std::vector<Screenshot>& GetScreenshots() const { return screenshots; }
+
+  void ClearScreenshots() { screenshots.clear(); }
+
+ private:
+  std::vector<Screenshot> screenshots;
+};
+
+}  // namespace gd

Core/GDCore/IDE/DependenciesAnalyzer.cpp

@@ -12,7 +12,6 @@
 #include "GDCore/Project/ExternalEvents.h"
 #include "GDCore/Project/Layout.h"
 #include "GDCore/Project/Project.h"
-#include "GDCore/Project/SourceFile.h"
 
 DependenciesAnalyzer::DependenciesAnalyzer(const gd::Project& project_,
                                            const gd::Layout& layout_)
@@ -74,16 +73,6 @@ bool DependenciesAnalyzer::Analyze(const gd::EventsList& events) {
       }
     }
 
-    // Search for source files dependencies
-    std::vector<gd::String> dependencies =
-        events[i].GetSourceFileDependencies();
-    sourceFilesDependencies.insert(dependencies.begin(), dependencies.end());
-
-    const gd::String& associatedSourceFile =
-        events[i].GetAssociatedGDManagedSourceFile(const_cast<gd::Project&>(project));
-    if (!associatedSourceFile.empty())
-      sourceFilesDependencies.insert(associatedSourceFile);
-
     // Analyze sub events dependencies
     if (events[i].CanHaveSubEvents()) {
       if (!Analyze(events[i].GetSubEvents())) return false;

Core/GDCore/IDE/DependenciesAnalyzer.h

@@ -71,14 +71,6 @@ class GD_CORE_API DependenciesAnalyzer {
     return externalEventsDependencies;
   };
 
-  /**
-   * \brief Return the source files being dependencies of the scene or external
-   * events passed in the constructor.
-   */
-  const std::set<gd::String>& GetSourceFilesDependencies() const {
-    return sourceFilesDependencies;
-  };
-
  private:
   /**
    * \brief Analyze the dependencies of the events.
@@ -92,7 +84,6 @@ class GD_CORE_API DependenciesAnalyzer {
 
   std::set<gd::String> scenesDependencies;
   std::set<gd::String> externalEventsDependencies;
-  std::set<gd::String> sourceFilesDependencies;
   std::vector<gd::String>
       parentScenes;  ///< Used to check for circular dependencies.
   std::vector<gd::String>

Core/GDCore/IDE/EventBasedBehaviorBrowser.cpp

@@ -29,9 +29,6 @@ void EventBasedBehaviorBrowser::ExposeEvents(
       project, eventsFunctionsExtension, eventsBasedBehavior, worker);
 }
 
-void EventBasedBehaviorBrowser::ExposeObjects(
-    gd::Project &project, gd::ArbitraryObjectsWorker &worker) const {}
-
 void EventBasedBehaviorBrowser::ExposeFunctions(
     gd::Project &project, gd::ArbitraryEventsFunctionsWorker &worker) const {
   worker.Launch(eventsBasedBehavior.GetEventsFunctions());
@@ -43,7 +40,4 @@ void EventBasedBehaviorBrowser::ExposeEventBasedBehaviors(
   worker.Launch(eventsBasedBehavior);
 }
 
-void EventBasedBehaviorBrowser::ExposeBehaviorSharedDatas(
-    gd::Project &project, gd::ArbitraryBehaviorSharedDataWorker &worker) const {}
-
 } // namespace gd

Core/GDCore/IDE/EventBasedBehaviorBrowser.h

@@ -67,7 +67,7 @@ public:
    * \brief Do nothing.
    */
   void ExposeObjects(gd::Project &project,
-                     gd::ArbitraryObjectsWorker &worker) const override;
+                     gd::ArbitraryObjectsWorker &worker) const override {};
 
   /**
    * \brief Call the specified worker on the event-based behavior.
@@ -80,7 +80,7 @@ public:
    * \brief Do nothing.
    */
   void ExposeBehaviorSharedDatas(gd::Project &project,
-                         gd::ArbitraryBehaviorSharedDataWorker &worker) const override;
+                         gd::ArbitraryBehaviorSharedDataWorker &worker) const override {};
 
 private:
   const gd::EventsFunctionsExtension &eventsFunctionsExtension;

Core/GDCore/IDE/EventBasedObjectBrowser.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 "EventBasedObjectBrowser.h"
+
+#include "GDCore/IDE/Events/ArbitraryEventsWorker.h"
+#include "GDCore/IDE/Project/ArbitraryEventBasedBehaviorsWorker.h"
+#include "GDCore/IDE/Project/ArbitraryEventsFunctionsWorker.h"
+#include "GDCore/IDE/Project/ArbitraryObjectsWorker.h"
+#include "GDCore/IDE/Project/ArbitraryBehaviorSharedDataWorker.h"
+#include "GDCore/IDE/ProjectBrowserHelper.h"
+#include "GDCore/Project/EventsBasedObject.h"
+#include "GDCore/Project/Project.h"
+#include "GDCore/String.h"
+
+namespace gd {
+
+void EventBasedObjectBrowser::ExposeEvents(
+    gd::Project &project, gd::ArbitraryEventsWorker &worker) const {
+  gd::ProjectBrowserHelper::ExposeEventsBasedObjectEvents(
+      project, eventsBasedObject, worker);
+}
+
+void EventBasedObjectBrowser::ExposeEvents(
+    gd::Project &project, gd::ArbitraryEventsWorkerWithContext &worker) const {
+  gd::ProjectBrowserHelper::ExposeEventsBasedObjectEvents(
+      project, eventsFunctionsExtension, eventsBasedObject, worker);
+}
+
+void EventBasedObjectBrowser::ExposeFunctions(
+    gd::Project &project, gd::ArbitraryEventsFunctionsWorker &worker) const {
+  worker.Launch(eventsBasedObject.GetEventsFunctions());
+}
+
+} // namespace gd

Core/GDCore/IDE/EventBasedObjectBrowser.h

@@ -0,0 +1,90 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#pragma once
+
+#include "GDCore/IDE/ProjectBrowser.h"
+
+namespace gd {
+class Project;
+class String;
+class EventsFunctionsExtension;
+class EventsFunction;
+class EventsBasedBehavior;
+class EventsBasedObject;
+class ArbitraryEventsWorker;
+class ArbitraryEventsWorkerWithContext;
+class ArbitraryEventsFunctionsWorker;
+class ArbitraryObjectsWorker;
+class ArbitraryEventBasedBehaviorsWorker;
+class ArbitraryBehaviorSharedDataWorker;
+} // namespace gd
+
+namespace gd {
+
+/**
+ * \brief Expose event-based object contents to workers.
+ */
+class GD_CORE_API EventBasedObjectBrowser : public ProjectBrowser {
+public:
+  EventBasedObjectBrowser(
+      const gd::EventsFunctionsExtension &eventsFunctionsExtension_,
+      gd::EventsBasedObject &eventsBasedObject_)
+      : eventsFunctionsExtension(eventsFunctionsExtension_),
+        eventsBasedObject(eventsBasedObject_) {}
+
+  /**
+   * \brief Call the specified worker on all events of the event-based
+   * object.
+   *
+   * This should be the preferred way to traverse all the events of an event-based object.
+   */
+  void ExposeEvents(gd::Project &project,
+                    gd::ArbitraryEventsWorker &worker) const override;
+
+  /**
+   * \brief Call the specified worker on all events of the event-based
+   * object.
+   *
+   * This should be the preferred way to traverse all the events of an event-based object.
+   */
+  void
+  ExposeEvents(gd::Project &project, 
+               gd::ArbitraryEventsWorkerWithContext &worker) const override;
+
+  /**
+   * \brief Call the specified worker on all functions of the event-based object
+   *
+   * This should be the preferred way to traverse all the function signatures
+   * of an event-based object.
+   */
+  void ExposeFunctions(gd::Project &project,
+                       gd::ArbitraryEventsFunctionsWorker &worker) const override;
+
+  /**
+   * \brief Do nothing.
+   */
+  void ExposeObjects(gd::Project &project,
+                     gd::ArbitraryObjectsWorker &worker) const override {};
+
+  /**
+   * @brief Do nothing.
+   */
+  void ExposeEventBasedBehaviors(
+      gd::Project &project,
+      gd::ArbitraryEventBasedBehaviorsWorker &worker) const override {};
+
+  /**
+   * \brief Do nothing.
+   */
+  void ExposeBehaviorSharedDatas(gd::Project &project,
+                         gd::ArbitraryBehaviorSharedDataWorker &worker) const override {};
+
+private:
+  const gd::EventsFunctionsExtension &eventsFunctionsExtension;
+  gd::EventsBasedObject &eventsBasedObject;
+};
+
+} // namespace gd

Core/GDCore/IDE/Events/EventsLeaderboardsLister.cpp

@@ -1,41 +0,0 @@
-/*
- * GDevelop Core
- * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
- * reserved. This project is released under the MIT License.
- */
-#include "GDCore/IDE/Events/EventsLeaderboardsLister.h"
-
-#include <map>
-#include <memory>
-#include <vector>
-
-#include "GDCore/Events/Event.h"
-#include "GDCore/Events/EventsList.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 {
-
-bool EventsLeaderboardsLister::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)
-    if (instrInfo.GetParameter(i).GetType() == "leaderboardId") {
-      leaderboardIds.insert(instruction.GetParameter(i).GetPlainString());
-    }
-  return false;
-}
-
-EventsLeaderboardsLister::~EventsLeaderboardsLister() {}
-
-}  // namespace gd

Core/GDCore/IDE/Events/EventsLeaderboardsLister.h

@@ -1,48 +0,0 @@
-/*
- * GDevelop Core
- * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
- * reserved. This project is released under the MIT License.
- */
-#ifndef EventsLeaderboardsLister_H
-#define EventsLeaderboardsLister_H
-#include <map>
-#include <memory>
-#include <set>
-#include <vector>
-
-#include "GDCore/IDE/Events/ArbitraryEventsWorker.h"
-#include "GDCore/String.h"
-namespace gd {
-class BaseEvent;
-class Project;
-class EventsList;
-}
-
-namespace gd {
-
-/**
- * \brief List the leaderboard ids in the instructions.
- *
- * \ingroup IDE
- */
-class GD_CORE_API EventsLeaderboardsLister : public ArbitraryEventsWorker {
- public:
-  EventsLeaderboardsLister(gd::Project& project_) : project(project_){};
-  virtual ~EventsLeaderboardsLister();
-
-  /**
-   * Return the values of all leaderboardIds found in the events.
-   */
-  const std::set<gd::String>& GetLeaderboardIds() { return leaderboardIds; }
-
- private:
-  virtual bool DoVisitInstruction(gd::Instruction& instruction,
-                                  bool isCondition);
-
-  std::set<gd::String> leaderboardIds;
-  gd::Project& project;
-};
-
-}  // namespace gd
-
-#endif  // EventsLeaderboardsLister_H

Core/GDCore/IDE/Events/EventsLeaderboardsRenamer.cpp

@@ -1,49 +0,0 @@
-/*
- * GDevelop Core
- * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
- * reserved. This project is released under the MIT License.
- */
-#include "GDCore/IDE/Events/EventsLeaderboardsRenamer.h"
-
-#include <map>
-#include <memory>
-#include <vector>
-
-#include "GDCore/Events/Event.h"
-#include "GDCore/Events/EventsList.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 {
-
-bool EventsLeaderboardsRenamer::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) {
-    const gd::ParameterMetadata parameter = instrInfo.GetParameter(i);
-
-    if (parameter.GetType() == "leaderboardId") {
-      const gd::String leaderboardId =
-          instruction.GetParameter(i).GetPlainString();
-
-      if (leaderboardIdMap.find(leaderboardId) != leaderboardIdMap.end()) {
-        instruction.SetParameter(i, leaderboardIdMap[leaderboardId]);
-      }
-    }
-  }
-  return false;
-}
-
-EventsLeaderboardsRenamer::~EventsLeaderboardsRenamer() {}
-
-}  // namespace gd

Core/GDCore/IDE/Events/EventsLeaderboardsRenamer.h

@@ -1,46 +0,0 @@
-/*
- * GDevelop Core
- * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
- * reserved. This project is released under the MIT License.
- */
-#ifndef EventsLeaderboardsRenamer_H
-#define EventsLeaderboardsRenamer_H
-#include <map>
-#include <memory>
-#include <set>
-#include <vector>
-
-#include "GDCore/IDE/Events/ArbitraryEventsWorker.h"
-#include "GDCore/String.h"
-namespace gd {
-class BaseEvent;
-class Project;
-class EventsList;
-}
-
-namespace gd {
-
-/**
- * \brief Replace the leaderboard ids in the instructions.
- *
- * \ingroup IDE
- */
-class GD_CORE_API EventsLeaderboardsRenamer : public ArbitraryEventsWorker {
- public:
-  EventsLeaderboardsRenamer(
-      gd::Project& project_,
-      const std::map<gd::String, gd::String>& leaderboardIdMap_)
-      : project(project_), leaderboardIdMap(leaderboardIdMap_){};
-  virtual ~EventsLeaderboardsRenamer();
-
- private:
-  virtual bool DoVisitInstruction(gd::Instruction& instruction,
-                                  bool isCondition);
-
-  std::map<gd::String, gd::String> leaderboardIdMap;
-  gd::Project& project;
-};
-
-}  // namespace gd
-
-#endif  // EventsLeaderboardsRenamer_H

Core/GDCore/IDE/Events/EventsParameterReplacer.cpp

@@ -0,0 +1,243 @@
+/*
+ * 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/EventsParameterReplacer.h"
+
+#include <map>
+#include <memory>
+#include <unordered_map>
+#include <unordered_set>
+#include <vector>
+
+#include "GDCore/Events/Event.h"
+#include "GDCore/Events/EventsList.h"
+#include "GDCore/Events/Parsers/ExpressionParser2NodePrinter.h"
+#include "GDCore/Events/Parsers/ExpressionParser2NodeWorker.h"
+#include "GDCore/Extensions/Metadata/MetadataProvider.h"
+#include "GDCore/Extensions/Metadata/ParameterMetadata.h"
+#include "GDCore/Extensions/Metadata/ParameterMetadataTools.h"
+#include "GDCore/IDE/Events/ExpressionValidator.h"
+#include "GDCore/Project/Layout.h"
+#include "GDCore/Project/Project.h"
+#include "GDCore/Project/ProjectScopedContainers.h"
+#include "GDCore/Project/PropertiesContainer.h"
+#include "GDCore/String.h"
+#include "GDCore/Tools/Log.h"
+
+namespace gd {
+
+/**
+ * \brief Go through the nodes and rename parameters.
+ *
+ * \see gd::ExpressionParser2
+ */
+class GD_CORE_API ExpressionParameterReplacer
+    : public ExpressionParser2NodeWorker {
+ public:
+  ExpressionParameterReplacer(
+      const gd::Platform& platform_,
+      const gd::ProjectScopedContainers& projectScopedContainers_,
+      bool isParentTypeAVariable_,
+      const std::unordered_map<gd::String, gd::String>& oldToNewPropertyNames_)
+      : hasDoneRenaming(false),
+        platform(platform_),
+        projectScopedContainers(projectScopedContainers_),
+        isParentTypeAVariable(isParentTypeAVariable_),
+        oldToNewPropertyNames(oldToNewPropertyNames_){};
+  virtual ~ExpressionParameterReplacer(){};
+
+  bool HasDoneRenaming() const { return hasDoneRenaming; }
+
+ protected:
+  void OnVisitSubExpressionNode(SubExpressionNode& node) override {
+    node.expression->Visit(*this);
+  }
+  void OnVisitOperatorNode(OperatorNode& node) override {
+    node.leftHandSide->Visit(*this);
+    node.rightHandSide->Visit(*this);
+  }
+  void OnVisitUnaryOperatorNode(UnaryOperatorNode& node) override {
+    node.factor->Visit(*this);
+  }
+  void OnVisitNumberNode(NumberNode& node) override {}
+  void OnVisitTextNode(TextNode& node) override {}
+  void OnVisitVariableNode(VariableNode& node) override {
+    if (isParentTypeAVariable) {
+        // Do nothing, it's a variable.
+        if (node.child) node.child->Visit(*this);
+        return;
+    }
+
+    // The node represents a variable or an object name on which a variable
+    // will be accessed, or a property with a child.
+
+    projectScopedContainers.MatchIdentifierWithName<void>(
+      // The property name is changed after the refactor operation.
+      node.name,
+      [&]() {
+        // Do nothing, it's an object variable.
+        if (node.child) node.child->Visit(*this);
+      }, [&]() {
+        // Do nothing, it's a variable.
+        if (node.child) node.child->Visit(*this);
+      }, [&]() {
+        // Do nothing, it's a property.
+        if (node.child) node.child->Visit(*this);
+      }, [&]() {
+        // This is a parameter
+        RenameParameter(node.name);
+        if (node.child) node.child->Visit(*this);
+      }, [&]() {
+        // Do nothing, it's something else.
+        if (node.child) node.child->Visit(*this);
+      });
+  }
+  void OnVisitVariableAccessorNode(VariableAccessorNode& node) override {
+    if (node.child) node.child->Visit(*this);
+  }
+  void OnVisitVariableBracketAccessorNode(
+      VariableBracketAccessorNode& node) override {
+    bool isGrandParentTypeAVariable = isParentTypeAVariable;
+    isParentTypeAVariable = false;
+    node.expression->Visit(*this);
+    isParentTypeAVariable = isGrandParentTypeAVariable;
+    if (node.child) node.child->Visit(*this);
+  }
+  void OnVisitIdentifierNode(IdentifierNode& node) override {
+    if (isParentTypeAVariable) {
+        // Do nothing, it's a variable.
+        return;
+    }
+    projectScopedContainers.MatchIdentifierWithName<void>(
+      // The property name is changed after the refactor operation
+      node.identifierName,
+      [&]() {
+        // Do nothing, it's an object variable.
+      }, [&]() {
+        // Do nothing, it's a variable.
+      }, [&]() {
+        // Do nothing, it's a property.
+      }, [&]() {
+        // This is a parameter.
+        RenameParameter(node.identifierName);
+      }, [&]() {
+        // Do nothing, it's something else.
+      });
+  }
+  void OnVisitObjectFunctionNameNode(ObjectFunctionNameNode& node) override {}
+  void OnVisitFunctionCallNode(FunctionCallNode &node) override {
+    bool isGrandParentTypeAVariable = isParentTypeAVariable;
+    for (auto &parameter : node.parameters) {
+      const auto &parameterMetadata =
+          gd::MetadataProvider::GetFunctionCallParameterMetadata(
+              platform, projectScopedContainers.GetObjectsContainersList(),
+              node, *parameter);
+      if (!parameterMetadata) {
+        continue;
+      }
+      const auto &parameterTypeMetadata =
+          parameterMetadata->GetValueTypeMetadata();
+      if (gd::EventsParameterReplacer::CanContainParameter(
+              parameterTypeMetadata)) {
+        isParentTypeAVariable = parameterTypeMetadata.IsVariableOnly();
+        parameter->Visit(*this);
+      }
+    }
+    isParentTypeAVariable = isGrandParentTypeAVariable;
+  }
+  void OnVisitEmptyNode(EmptyNode& node) override {}
+
+ private:
+  bool hasDoneRenaming;
+
+  bool RenameParameter(
+      gd::String& name) {
+    if (oldToNewPropertyNames.count(name) >= 1) {
+      name = oldToNewPropertyNames.find(name)->second;
+      hasDoneRenaming = true;
+      return true;
+    }
+
+    return false;  // Nothing was changed or done.
+  }
+
+  // Scope:
+  const gd::Platform& platform;
+  const gd::ProjectScopedContainers& projectScopedContainers;
+
+  // Renaming to do
+  const std::unordered_map<gd::String, gd::String>& oldToNewPropertyNames;
+
+  gd::String objectNameToUseForVariableAccessor;
+  bool isParentTypeAVariable;
+};
+
+bool EventsParameterReplacer::DoVisitInstruction(gd::Instruction& instruction,
+                                                bool isCondition) {
+  const auto& metadata = isCondition
+                             ? gd::MetadataProvider::GetConditionMetadata(
+                                   platform, instruction.GetType())
+                             : gd::MetadataProvider::GetActionMetadata(
+                                   platform, instruction.GetType());
+
+  gd::ParameterMetadataTools::IterateOverParametersWithIndex(
+      instruction.GetParameters(),
+      metadata.GetParameters(),
+      [&](const gd::ParameterMetadata& parameterMetadata,
+          const gd::Expression& parameterValue,
+          size_t parameterIndex,
+          const gd::String& lastObjectName) {
+        if (!gd::EventsParameterReplacer::CanContainParameter(
+          parameterMetadata.GetValueTypeMetadata())) {
+          return;
+        }
+        auto node = parameterValue.GetRootNode();
+        if (node) {
+          ExpressionParameterReplacer renamer(
+              platform, GetProjectScopedContainers(),
+              parameterMetadata.GetValueTypeMetadata().IsVariableOnly(),
+              oldToNewPropertyNames);
+          node->Visit(renamer);
+
+          if (renamer.HasDoneRenaming()) {
+            instruction.SetParameter(
+                parameterIndex, ExpressionParser2NodePrinter::PrintNode(*node));
+          }
+        }
+      });
+
+  return false;
+}
+
+bool EventsParameterReplacer::DoVisitEventExpression(
+    gd::Expression& expression, const gd::ParameterMetadata& metadata) {
+  if (!gd::EventsParameterReplacer::CanContainParameter(
+          metadata.GetValueTypeMetadata())) {
+    return false;
+  }
+  auto node = expression.GetRootNode();
+  if (node) {
+    ExpressionParameterReplacer renamer(
+        platform, GetProjectScopedContainers(),
+        metadata.GetValueTypeMetadata().IsVariableOnly(), oldToNewPropertyNames);
+    node->Visit(renamer);
+
+    if (renamer.HasDoneRenaming()) {
+      expression = ExpressionParser2NodePrinter::PrintNode(*node);
+    }
+  }
+
+  return false;
+}
+
+bool EventsParameterReplacer::CanContainParameter(
+    const gd::ValueTypeMetadata &valueTypeMetadata) {
+  return valueTypeMetadata.IsVariable() || valueTypeMetadata.IsNumber() ||
+         valueTypeMetadata.IsString();
+}
+
+EventsParameterReplacer::~EventsParameterReplacer() {}
+
+}  // namespace gd

Core/GDCore/IDE/Events/EventsParameterReplacer.h

@@ -0,0 +1,52 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#pragma once
+
+#include <map>
+#include <memory>
+#include <unordered_map>
+#include <unordered_set>
+#include <vector>
+
+#include "GDCore/IDE/Events/ArbitraryEventsWorker.h"
+#include "GDCore/String.h"
+namespace gd {
+class BaseEvent;
+class PropertiesContainer;
+class EventsList;
+class Platform;
+}  // namespace gd
+
+namespace gd {
+/**
+ * \brief Replace in expressions and in parameters of actions or conditions,
+ * references to the name of a parameter by another.
+ *
+ * \ingroup IDE
+ */
+class GD_CORE_API EventsParameterReplacer
+    : public ArbitraryEventsWorkerWithContext {
+ public:
+  EventsParameterReplacer(
+      const gd::Platform &platform_,
+      const std::unordered_map<gd::String, gd::String> &oldToNewPropertyNames_)
+      : platform(platform_),
+        oldToNewPropertyNames(oldToNewPropertyNames_){};
+  virtual ~EventsParameterReplacer();
+
+  static bool CanContainParameter(const gd::ValueTypeMetadata &valueTypeMetadata);
+
+ private:
+  bool DoVisitInstruction(gd::Instruction &instruction,
+                          bool isCondition) override;
+  bool DoVisitEventExpression(gd::Expression &expression,
+                              const gd::ParameterMetadata &metadata) override;
+
+  const gd::Platform &platform;
+  const std::unordered_map<gd::String, gd::String> &oldToNewPropertyNames;
+};
+
+}  // namespace gd

Core/GDCore/IDE/Events/EventsPropertyReplacer.cpp

@@ -41,6 +41,7 @@ class GD_CORE_API ExpressionPropertyReplacer
       const gd::Platform& platform_,
       const gd::ProjectScopedContainers& projectScopedContainers_,
       const gd::PropertiesContainer& targetPropertiesContainer_,
+      bool isParentTypeAVariable_,
       const std::unordered_map<gd::String, gd::String>& oldToNewPropertyNames_,
       const std::unordered_set<gd::String>& removedPropertyNames_)
       : hasDoneRenaming(false),
@@ -48,6 +49,7 @@ class GD_CORE_API ExpressionPropertyReplacer
         platform(platform_),
         projectScopedContainers(projectScopedContainers_),
         targetPropertiesContainer(targetPropertiesContainer_),
+        isParentTypeAVariable(isParentTypeAVariable_),
         oldToNewPropertyNames(oldToNewPropertyNames_),
         removedPropertyNames(removedPropertyNames_){};
   virtual ~ExpressionPropertyReplacer(){};
@@ -69,16 +71,21 @@ class GD_CORE_API ExpressionPropertyReplacer
   void OnVisitNumberNode(NumberNode& node) override {}
   void OnVisitTextNode(TextNode& node) override {}
   void OnVisitVariableNode(VariableNode& node) override {
+    if (isParentTypeAVariable) {
+        // Do nothing, it's a variable.
+        if (node.child) node.child->Visit(*this);
+        return;
+    }
+
     auto& propertiesContainersList =
         projectScopedContainers.GetPropertiesContainersList();
 
     // The node represents a variable or an object name on which a variable
     // will be accessed, or a property with a child.
 
-    // Match the potential *new* name of the property, because refactorings are
-    // done after changes in the variables container.
     projectScopedContainers.MatchIdentifierWithName<void>(
-      GetPotentialNewName(node.name),
+      // The property name is changed after the refactor operation.
+      node.name,
       [&]() {
         // Do nothing, it's an object variable.
         if (node.child) node.child->Visit(*this);
@@ -100,16 +107,7 @@ class GD_CORE_API ExpressionPropertyReplacer
         // Do nothing, it's a parameter.
         if (node.child) node.child->Visit(*this);
       }, [&]() {
-        // This is something else - potentially a deleted property.
-        // Check if it's coming from the target container with
-        // properties to replace.
-        if (propertiesContainersList.HasPropertiesContainer(
-                targetPropertiesContainer)) {
-          // The node represents a property, that can come from the target
-          // (because the target is in the scope), replace or remove it:
-          RenameOrRemovePropertyOfTargetPropertyContainer(node.name);
-        }
-
+        // Do nothing, it's something else.
         if (node.child) node.child->Visit(*this);
       });
   }
@@ -118,17 +116,24 @@ class GD_CORE_API ExpressionPropertyReplacer
   }
   void OnVisitVariableBracketAccessorNode(
       VariableBracketAccessorNode& node) override {
+    bool isGrandParentTypeAVariable = isParentTypeAVariable;
+    isParentTypeAVariable = false;
     node.expression->Visit(*this);
+    isParentTypeAVariable = isGrandParentTypeAVariable;
     if (node.child) node.child->Visit(*this);
   }
   void OnVisitIdentifierNode(IdentifierNode& node) override {
+    if (isParentTypeAVariable) {
+        // Do nothing, it's a variable.
+        return;
+    }
+
     auto& propertiesContainersList =
         projectScopedContainers.GetPropertiesContainersList();
 
-    // Match the potential *new* name of the property, because refactorings are
-    // done after changes in the variables container.
     projectScopedContainers.MatchIdentifierWithName<void>(
-      GetPotentialNewName(node.identifierName),
+      // The property name is changed after the refactor operation
+      node.identifierName,
       [&]() {
         // Do nothing, it's an object variable.
       }, [&]() {
@@ -145,22 +150,29 @@ class GD_CORE_API ExpressionPropertyReplacer
       }, [&]() {
         // Do nothing, it's a parameter.
       }, [&]() {
-        // This is something else - potentially a deleted property.
-        // Check if it's coming from the target container with
-        // properties to replace.
-        if (propertiesContainersList.HasPropertiesContainer(
-                targetPropertiesContainer)) {
-          // The node represents a property, that can come from the target
-          // (because the target is in the scope), replace or remove it:
-          RenameOrRemovePropertyOfTargetPropertyContainer(node.identifierName);
-        }
+        // Do nothing, it's something else.
       });
   }
   void OnVisitObjectFunctionNameNode(ObjectFunctionNameNode& node) override {}
-  void OnVisitFunctionCallNode(FunctionCallNode& node) override {
-    for (auto& parameter : node.parameters) {
-      parameter->Visit(*this);
+  void OnVisitFunctionCallNode(FunctionCallNode &node) override {
+    bool isGrandParentTypeAVariable = isParentTypeAVariable;
+    for (auto &parameter : node.parameters) {
+      const auto &parameterMetadata =
+          gd::MetadataProvider::GetFunctionCallParameterMetadata(
+              platform, projectScopedContainers.GetObjectsContainersList(),
+              node, *parameter);
+      if (!parameterMetadata) {
+        continue;
+      }
+      const auto &parameterTypeMetadata =
+          parameterMetadata->GetValueTypeMetadata();
+      if (gd::EventsPropertyReplacer::CanContainProperty(
+              parameterTypeMetadata)) {
+        isParentTypeAVariable = parameterTypeMetadata.IsVariableOnly();
+        parameter->Visit(*this);
+      }
     }
+    isParentTypeAVariable = isGrandParentTypeAVariable;
   }
   void OnVisitEmptyNode(EmptyNode& node) override {}
 
@@ -168,12 +180,6 @@ class GD_CORE_API ExpressionPropertyReplacer
   bool hasDoneRenaming;
   bool removedPropertyUsed;
 
-  const gd::String& GetPotentialNewName(const gd::String& oldName) {
-    return oldToNewPropertyNames.count(oldName) >= 1
-            ? oldToNewPropertyNames.find(oldName)->second
-            : oldName;
-  }
-
   bool RenameOrRemovePropertyOfTargetPropertyContainer(
       gd::String& propertyName) {
     if (oldToNewPropertyNames.count(propertyName) >= 1) {
@@ -198,6 +204,7 @@ class GD_CORE_API ExpressionPropertyReplacer
   const std::unordered_set<gd::String>& removedPropertyNames;
 
   gd::String objectNameToUseForVariableAccessor;
+  bool isParentTypeAVariable;
 };
 
 bool EventsPropertyReplacer::DoVisitInstruction(gd::Instruction& instruction,
@@ -216,20 +223,16 @@ bool EventsPropertyReplacer::DoVisitInstruction(gd::Instruction& instruction,
           const gd::Expression& parameterValue,
           size_t parameterIndex,
           const gd::String& lastObjectName) {
-        const gd::String& type = parameterMetadata.GetType();
-
-        if (!gd::ParameterMetadata::IsExpression("variable", type) &&
-            !gd::ParameterMetadata::IsExpression("number", type) &&
-            !gd::ParameterMetadata::IsExpression("string", type))
-          return;  // Not an expression that can contain properties.
-
+        if (!gd::EventsPropertyReplacer::CanContainProperty(
+          parameterMetadata.GetValueTypeMetadata())) {
+          return;
+        }
         auto node = parameterValue.GetRootNode();
         if (node) {
-          ExpressionPropertyReplacer renamer(platform,
-                                             GetProjectScopedContainers(),
-                                             targetPropertiesContainer,
-                                             oldToNewPropertyNames,
-                                             removedPropertyNames);
+          ExpressionPropertyReplacer renamer(
+              platform, GetProjectScopedContainers(), targetPropertiesContainer,
+              parameterMetadata.GetValueTypeMetadata().IsVariableOnly(),
+              oldToNewPropertyNames, removedPropertyNames);
           node->Visit(renamer);
 
           if (renamer.IsRemovedPropertyUsed()) {
@@ -246,20 +249,16 @@ bool EventsPropertyReplacer::DoVisitInstruction(gd::Instruction& instruction,
 
 bool EventsPropertyReplacer::DoVisitEventExpression(
     gd::Expression& expression, const gd::ParameterMetadata& metadata) {
-  const gd::String& type = metadata.GetType();
-
-  if (!gd::ParameterMetadata::IsExpression("variable", type) &&
-      !gd::ParameterMetadata::IsExpression("number", type) &&
-      !gd::ParameterMetadata::IsExpression("string", type))
-    return false;  // Not an expression that can contain properties.
-
+  if (!gd::EventsPropertyReplacer::CanContainProperty(
+          metadata.GetValueTypeMetadata())) {
+    return false;
+  }
   auto node = expression.GetRootNode();
   if (node) {
-    ExpressionPropertyReplacer renamer(platform,
-                                       GetProjectScopedContainers(),
-                                       targetPropertiesContainer,
-                                       oldToNewPropertyNames,
-                                       removedPropertyNames);
+    ExpressionPropertyReplacer renamer(
+        platform, GetProjectScopedContainers(), targetPropertiesContainer,
+        metadata.GetValueTypeMetadata().IsVariableOnly(), oldToNewPropertyNames,
+        removedPropertyNames);
     node->Visit(renamer);
 
     if (renamer.IsRemovedPropertyUsed()) {
@@ -272,6 +271,12 @@ bool EventsPropertyReplacer::DoVisitEventExpression(
   return false;
 }
 
+bool EventsPropertyReplacer::CanContainProperty(
+    const gd::ValueTypeMetadata &valueTypeMetadata) {
+  return valueTypeMetadata.IsVariable() || valueTypeMetadata.IsNumber() ||
+         valueTypeMetadata.IsString();
+}
+
 EventsPropertyReplacer::~EventsPropertyReplacer() {}
 
 }  // namespace gd

Core/GDCore/IDE/Events/EventsPropertyReplacer.h

@@ -4,6 +4,7 @@
  * reserved. This project is released under the MIT License.
  */
 #pragma once
+
 #include <map>
 #include <memory>
 #include <unordered_map>
@@ -41,6 +42,8 @@ class GD_CORE_API EventsPropertyReplacer
         removedPropertyNames(removedPropertyNames_){};
   virtual ~EventsPropertyReplacer();
 
+  static bool CanContainProperty(const gd::ValueTypeMetadata &valueTypeMetadata);
+
  private:
   bool DoVisitInstruction(gd::Instruction &instruction,
                           bool isCondition) override;

Core/GDCore/IDE/Events/EventsRefactorer.cpp

@@ -22,6 +22,7 @@
 #include "GDCore/Project/EventsBasedObject.h"
 #include "GDCore/Project/ProjectScopedContainers.h"
 #include "GDCore/IDE/Events/ExpressionTypeFinder.h"
+#include "GDCore/IDE/Events/ArbitraryEventsWorker.h"
 
 using namespace std;
 
@@ -51,17 +52,17 @@ class GD_CORE_API ExpressionObjectRenamer : public ExpressionParser2NodeWorker {
 
   static bool Rename(const gd::Platform &platform,
                      const gd::ProjectScopedContainers &projectScopedContainers,
-                     const gd::String &rootType,
-                     gd::ExpressionNode& node,
-                     const gd::String& objectName,
-                     const gd::String& objectNewName) {
-    if (gd::ExpressionValidator::HasNoErrors(platform, projectScopedContainers, rootType, node)) {
-      ExpressionObjectRenamer renamer(platform, projectScopedContainers, rootType, objectName, objectNewName);
+                     const gd::String &rootType, gd::ExpressionNode &node,
+                     const gd::String &objectName,
+                     const gd::String &objectNewName) {
+    if (gd::ExpressionValidator::HasNoErrors(platform, projectScopedContainers,
+                                             rootType, node)) {
+      ExpressionObjectRenamer renamer(platform, projectScopedContainers,
+                                      rootType, objectName, objectNewName);
       node.Visit(renamer);
 
       return renamer.HasDoneRenaming();
     }
-
     return false;
   }
 
@@ -83,7 +84,7 @@ class GD_CORE_API ExpressionObjectRenamer : public ExpressionParser2NodeWorker {
   void OnVisitVariableNode(VariableNode& node) override {
     auto type = gd::ExpressionTypeFinder::GetType(platform, projectScopedContainers, rootType, node);
 
-    if (gd::ValueTypeMetadata::IsTypeLegacyPreScopedVariable(type)) {
+    if (gd::ValueTypeMetadata::IsVariable(type)) {
       // Nothing to do (this can't reference an object)
     } else {
       if (node.name == objectName) {
@@ -119,7 +120,7 @@ class GD_CORE_API ExpressionObjectRenamer : public ExpressionParser2NodeWorker {
         node.identifierName == objectName) {
       hasDoneRenaming = true;
       node.identifierName = objectNewName;
-    } else if (gd::ValueTypeMetadata::IsTypeLegacyPreScopedVariable(type)) {
+    } else if (gd::ValueTypeMetadata::IsVariable(type)) {
       // Nothing to do (this can't reference an object)
     } else {
       if (node.identifierName == objectName) {
@@ -295,183 +296,114 @@ class GD_CORE_API ExpressionObjectFinder : public ExpressionParser2NodeWorker {
   const gd::String rootType;
 };
 
-bool EventsRefactorer::RenameObjectInActions(const gd::Platform& platform,
-                                             const gd::ProjectScopedContainers& projectScopedContainers,
-                                             gd::InstructionsList& actions,
-                                             gd::String oldName,
-                                             gd::String newName) {
-  bool somethingModified = false;
+/**
+ * \brief Replace in expressions and in parameters of actions or conditions,
+ * references to the name of an object by another.
+ *
+ * \ingroup IDE
+ */
+class GD_CORE_API EventsObjectReplacer
+    : public ArbitraryEventsWorkerWithContext {
+public:
+  EventsObjectReplacer(const gd::Platform &platform_,
+                       const gd::ObjectsContainer &targetedObjectsContainer_,
+                       const gd::String &oldObjectName_,
+                       const gd::String &newObjectName_)
+      : platform(platform_),
+        targetedObjectsContainer(targetedObjectsContainer_),
+        oldObjectName(oldObjectName_), newObjectName(newObjectName_){};
 
-  for (std::size_t aId = 0; aId < actions.size(); ++aId) {
-    const gd::InstructionMetadata& instrInfos =
-        MetadataProvider::GetActionMetadata(platform, actions[aId].GetType());
-    for (std::size_t pNb = 0; pNb < instrInfos.parameters.GetParametersCount(); ++pNb) {
-      // Replace object's name in parameters
-      if (gd::ParameterMetadata::IsObject(instrInfos.parameters.GetParameter(pNb).GetType()) &&
-          actions[aId].GetParameter(pNb).GetPlainString() == oldName)
-        actions[aId].SetParameter(pNb, gd::Expression(newName));
-      // Replace object's name in expressions
-      else if (ParameterMetadata::IsExpression(
-                   "number", instrInfos.parameters.GetParameter(pNb).GetType())) {
-        auto node = actions[aId].GetParameter(pNb).GetRootNode();
+  virtual ~EventsObjectReplacer() {}
 
-        if (ExpressionObjectRenamer::Rename(platform, projectScopedContainers, "number", *node, oldName, newName)) {
-          actions[aId].SetParameter(
-              pNb, ExpressionParser2NodePrinter::PrintNode(*node));
-        }
-      }
-      // Replace object's name in text expressions
-      else if (ParameterMetadata::IsExpression(
-                   "string", instrInfos.parameters.GetParameter(pNb).GetType())) {
-        auto node = actions[aId].GetParameter(pNb).GetRootNode();
-
-        if (ExpressionObjectRenamer::Rename(platform, projectScopedContainers, "string", *node, oldName, newName)) {
-          actions[aId].SetParameter(
-              pNb, ExpressionParser2NodePrinter::PrintNode(*node));
-        }
-      }
+private:
+  bool DoVisitInstruction(gd::Instruction &instruction,
+                          bool isCondition) override {
+    if (&targetedObjectsContainer !=
+        GetProjectScopedContainers()
+            .GetObjectsContainersList()
+            .GetObjectsContainerFromObjectName(oldObjectName)) {
+      return false;
     }
+    const auto &metadata = isCondition
+                               ? gd::MetadataProvider::GetConditionMetadata(
+                                     platform, instruction.GetType())
+                               : gd::MetadataProvider::GetActionMetadata(
+                                     platform, instruction.GetType());
 
-    if (!actions[aId].GetSubInstructions().empty())
-      somethingModified =
-          RenameObjectInActions(platform,
-                                projectScopedContainers,
-                                actions[aId].GetSubInstructions(),
-                                oldName,
-                                newName) ||
-          somethingModified;
+    gd::ParameterMetadataTools::IterateOverParametersWithIndex(
+        instruction.GetParameters(), metadata.GetParameters(),
+        [&](const gd::ParameterMetadata &parameterMetadata,
+            const gd::Expression &parameterValue, size_t parameterIndex,
+            const gd::String &lastObjectName) {
+          if (!gd::EventsObjectReplacer::CanContainObject(
+                  parameterMetadata.GetValueTypeMetadata())) {
+            return;
+          }
+          auto node = parameterValue.GetRootNode();
+          if (node) {
+            ExpressionObjectRenamer renamer(
+                platform, GetProjectScopedContainers(),
+                parameterMetadata.GetValueTypeMetadata().GetName(),
+                oldObjectName, newObjectName);
+            node->Visit(renamer);
+
+            if (renamer.HasDoneRenaming()) {
+              instruction.SetParameter(
+                  parameterIndex,
+                  ExpressionParser2NodePrinter::PrintNode(*node));
+            }
+          }
+        });
+
+    return false;
   }
 
-  return somethingModified;
-}
-
-bool EventsRefactorer::RenameObjectInConditions(
-    const gd::Platform& platform,
-    const gd::ProjectScopedContainers& projectScopedContainers,
-    gd::InstructionsList& conditions,
-    gd::String oldName,
-    gd::String newName) {
-  bool somethingModified = false;
-
-  for (std::size_t cId = 0; cId < conditions.size(); ++cId) {
-    const gd::InstructionMetadata& instrInfos =
-        MetadataProvider::GetConditionMetadata(platform,
-                                               conditions[cId].GetType());
-    for (std::size_t pNb = 0; pNb < instrInfos.parameters.GetParametersCount(); ++pNb) {
-      // Replace object's name in parameters
-      if (gd::ParameterMetadata::IsObject(instrInfos.parameters.GetParameter(pNb).GetType()) &&
-          conditions[cId].GetParameter(pNb).GetPlainString() == oldName)
-        conditions[cId].SetParameter(pNb, gd::Expression(newName));
-      // Replace object's name in expressions
-      else if (ParameterMetadata::IsExpression(
-                   "number", instrInfos.parameters.GetParameter(pNb).GetType())) {
-        auto node = conditions[cId].GetParameter(pNb).GetRootNode();
-
-        if (ExpressionObjectRenamer::Rename(platform, projectScopedContainers, "number", *node, oldName, newName)) {
-          conditions[cId].SetParameter(
-              pNb, ExpressionParser2NodePrinter::PrintNode(*node));
-        }
-      }
-      // Replace object's name in text expressions
-      else if (ParameterMetadata::IsExpression(
-                   "string", instrInfos.parameters.GetParameter(pNb).GetType())) {
-        auto node = conditions[cId].GetParameter(pNb).GetRootNode();
-
-        if (ExpressionObjectRenamer::Rename(platform, projectScopedContainers, "string", *node, oldName, newName)) {
-          conditions[cId].SetParameter(
-              pNb, ExpressionParser2NodePrinter::PrintNode(*node));
-        }
-      }
+  bool DoVisitEventExpression(gd::Expression &expression,
+                              const gd::ParameterMetadata &metadata) override {
+    if (&targetedObjectsContainer !=
+        GetProjectScopedContainers()
+            .GetObjectsContainersList()
+            .GetObjectsContainerFromObjectName(oldObjectName)) {
+      return false;
+    }
+    if (!gd::EventsObjectReplacer::CanContainObject(
+            metadata.GetValueTypeMetadata())) {
+      return false;
     }
-
-    if (!conditions[cId].GetSubInstructions().empty())
-      somethingModified =
-          RenameObjectInConditions(platform,
-                                   projectScopedContainers,
-                                   conditions[cId].GetSubInstructions(),
-                                   oldName,
-                                   newName) ||
-          somethingModified;
-  }
-
-  return somethingModified;
-}
-
-bool EventsRefactorer::RenameObjectInEventParameters(
-    const gd::Platform& platform,
-    const gd::ProjectScopedContainers& projectScopedContainers,
-    gd::Expression& expression,
-    gd::ParameterMetadata parameterMetadata,
-    gd::String oldName,
-    gd::String newName) {
-  bool somethingModified = false;
-
-  if (gd::ParameterMetadata::IsObject(parameterMetadata.GetType()) &&
-      expression.GetPlainString() == oldName)
-    expression = gd::Expression(newName);
-  // Replace object's name in expressions
-  else if (ParameterMetadata::IsExpression("number",
-                                           parameterMetadata.GetType())) {
     auto node = expression.GetRootNode();
+    if (node) {
+      ExpressionObjectRenamer renamer(platform, GetProjectScopedContainers(),
+                                      metadata.GetValueTypeMetadata().GetName(),
+                                      oldObjectName, newObjectName);
+      node->Visit(renamer);
 
-    if (ExpressionObjectRenamer::Rename(platform, projectScopedContainers, "number", *node, oldName, newName)) {
-      expression = ExpressionParser2NodePrinter::PrintNode(*node);
+      if (renamer.HasDoneRenaming()) {
+        expression = ExpressionParser2NodePrinter::PrintNode(*node);
+      }
     }
-  }
-  // Replace object's name in text expressions
-  else if (ParameterMetadata::IsExpression("string",
-                                           parameterMetadata.GetType())) {
-    auto node = expression.GetRootNode();
 
-    if (ExpressionObjectRenamer::Rename(platform, projectScopedContainers, "string", *node, oldName, newName)) {
-      expression = ExpressionParser2NodePrinter::PrintNode(*node);
-    }
+    return false;
   }
 
-  return somethingModified;
-}
+  bool CanContainObject(const gd::ValueTypeMetadata &valueTypeMetadata) {
+    return valueTypeMetadata.IsObject() || valueTypeMetadata.IsVariable() ||
+           valueTypeMetadata.IsNumber() || valueTypeMetadata.IsString();
+  }
+
+  const gd::Platform &platform;
+  const gd::ObjectsContainer &targetedObjectsContainer;
+  const gd::String &oldObjectName;
+  const gd::String &newObjectName;
+};
 
 void EventsRefactorer::RenameObjectInEvents(const gd::Platform& platform,
                                             const gd::ProjectScopedContainers& projectScopedContainers,
                                             gd::EventsList& events,
+                                            const gd::ObjectsContainer &targetedObjectsContainer,
                                             gd::String oldName,
                                             gd::String newName) {
-  for (std::size_t i = 0; i < events.size(); ++i) {
-    vector<gd::InstructionsList*> conditionsVectors =
-        events[i].GetAllConditionsVectors();
-    for (std::size_t j = 0; j < conditionsVectors.size(); ++j) {
-      bool somethingModified = RenameObjectInConditions(
-          platform, projectScopedContainers, *conditionsVectors[j], oldName, newName);
-    }
-
-    vector<gd::InstructionsList*> actionsVectors =
-        events[i].GetAllActionsVectors();
-    for (std::size_t j = 0; j < actionsVectors.size(); ++j) {
-      bool somethingModified = RenameObjectInActions(
-          platform, projectScopedContainers, *actionsVectors[j], oldName, newName);
-    }
-
-    vector<pair<gd::Expression*, gd::ParameterMetadata>>
-        expressionsWithMetadata = events[i].GetAllExpressionsWithMetadata();
-    for (std::size_t j = 0; j < expressionsWithMetadata.size(); ++j) {
-      gd::Expression* expression = expressionsWithMetadata[j].first;
-      gd::ParameterMetadata parameterMetadata =
-          expressionsWithMetadata[j].second;
-      bool somethingModified = RenameObjectInEventParameters(platform,
-                                                             projectScopedContainers,
-                                                             *expression,
-                                                             parameterMetadata,
-                                                             oldName,
-                                                             newName);
-    }
-
-    if (events[i].CanHaveSubEvents())
-      RenameObjectInEvents(platform,
-                           projectScopedContainers,
-                           events[i].GetSubEvents(),
-                           oldName,
-                           newName);
-  }
+  gd::EventsObjectReplacer eventsParameterReplacer(platform, targetedObjectsContainer, oldName, newName);
+  eventsParameterReplacer.Launch(events, projectScopedContainers);
 }
 
 bool EventsRefactorer::RemoveObjectInActions(const gd::Platform& platform,

Core/GDCore/IDE/Events/EventsRefactorer.h

@@ -83,6 +83,7 @@ class GD_CORE_API EventsRefactorer {
   static void RenameObjectInEvents(const gd::Platform& platform,
                                    const gd::ProjectScopedContainers& projectScopedContainers,
                                    gd::EventsList& events,
+                                   const gd::ObjectsContainer &targetedObjectsContainer,
                                    gd::String oldName,
                                    gd::String newName);
 
@@ -121,44 +122,6 @@ class GD_CORE_API EventsRefactorer {
   virtual ~EventsRefactorer(){};
 
  private:
-  /**
-   * Replace all occurrences of an object name by another name in an action
-   * ( include : objects in parameters and in math/text expressions ).
-   *
-   * \return true if something was modified.
-   */
-  static bool RenameObjectInActions(const gd::Platform& platform,
-                                    const gd::ProjectScopedContainers& projectScopedContainers,
-                                    gd::InstructionsList& instructions,
-                                    gd::String oldName,
-                                    gd::String newName);
-
-  /**
-   * Replace all occurrences of an object name by another name in a condition
-   * ( include : objects in parameters and in math/text expressions ).
-   *
-   * \return true if something was modified.
-   */
-  static bool RenameObjectInConditions(const gd::Platform& platform,
-                                       const gd::ProjectScopedContainers& projectScopedContainers,
-                                       gd::InstructionsList& instructions,
-                                       gd::String oldName,
-                                       gd::String newName);
-  /**
-   * Replace all occurrences of an object name by another name in an expression
-   * with the specified metadata
-   * ( include : objects or objects in math/text expressions ).
-   *
-   * \return true if something was modified.
-   */
-  static bool RenameObjectInEventParameters(
-      const gd::Platform& platform,
-      const gd::ProjectScopedContainers& projectScopedContainers,
-      gd::Expression& expression,
-      gd::ParameterMetadata parameterMetadata,
-      gd::String oldName,
-      gd::String newName);
-
   /**
    * Remove all conditions of the list using an object
    *

Core/GDCore/IDE/Events/EventsVariableInstructionTypeSwitcher.cpp

@@ -71,13 +71,18 @@ bool EventsVariableInstructionTypeSwitcher::DoVisitInstruction(gd::Instruction&
                     .GetObjectsContainersList()
                     .GetObjectOrGroupVariablesContainer(lastObjectName);
           }
+        } else if (type == "variableOrProperty") {
+            variablesContainer =
+                &GetProjectScopedContainers()
+                      .GetVariablesContainersList()
+                      .GetVariablesContainerFromVariableOrPropertyName(variableName);
         } else {
           if (GetProjectScopedContainers().GetVariablesContainersList().Has(
                   variableName)) {
             variablesContainer =
                 &GetProjectScopedContainers()
                       .GetVariablesContainersList()
-                      .GetVariablesContainerFromVariableName(variableName);
+                      .GetVariablesContainerFromVariableOrPropertyOrParameterName(variableName);
           }
         }
 

Core/GDCore/IDE/Events/EventsVariableReplacer.cpp

@@ -122,7 +122,7 @@ class GD_CORE_API ExpressionVariableReplacer
         [&]() {
           // This is a variable.
           if (&projectScopedContainers.GetVariablesContainersList()
-                   .GetVariablesContainerFromVariableName(node.name) ==
+                   .GetVariablesContainerFromVariableOrPropertyOrParameterName(node.name) ==
               &targetVariablesContainer) {
             // The node represents a variable, that can come from the target
             // (because the target is in the scope), replace or remove it:
@@ -235,7 +235,7 @@ class GD_CORE_API ExpressionVariableReplacer
         [&]() {
           // This is a variable.
           if (&projectScopedContainers.GetVariablesContainersList()
-                   .GetVariablesContainerFromVariableName(
+                   .GetVariablesContainerFromVariableOrPropertyOrParameterName(
                        node.identifierName) == &targetVariablesContainer) {
             // The node represents a variable, that can come from the target
             // (because the target is in the scope), replace or remove it:

Core/GDCore/IDE/Events/ExpressionCompletionFinder.h

@@ -337,19 +337,19 @@ struct GD_CORE_API ExpressionCompletionDescription {
 
  private:
   CompletionKind completionKind;
-  gd::Variable::Type variableType;
-  gd::VariablesContainer::SourceType variableScope;
+  gd::Variable::Type variableType = gd::Variable::Unknown;
+  gd::VariablesContainer::SourceType variableScope = gd::VariablesContainer::Unknown;
   gd::String type;
   gd::String prefix;
   gd::String completion;
-  size_t replacementStartPosition;
-  size_t replacementEndPosition;
+  size_t replacementStartPosition = 0;
+  size_t replacementEndPosition = 0;
   gd::String objectName;
   gd::String behaviorName;
-  bool isExact;
-  bool isLastParameter;
-  const gd::ParameterMetadata* parameterMetadata;
-  const gd::ObjectConfiguration* objectConfiguration;
+  bool isExact = false;
+  bool isLastParameter = false;
+  const gd::ParameterMetadata* parameterMetadata = &badParameterMetadata;
+  const gd::ObjectConfiguration* objectConfiguration = &badObjectConfiguration;
 
   static const gd::ParameterMetadata badParameterMetadata;
   static const gd::ObjectConfiguration badObjectConfiguration;
@@ -1034,7 +1034,7 @@ class GD_CORE_API ExpressionCompletionFinder
           description.SetVariableType(variable.GetType());
           description.SetVariableScope(
               projectScopedContainers.GetVariablesContainersList()
-                  .GetVariablesContainerFromVariableName(variableName)
+                  .GetVariablesContainerFromVariableOrPropertyOrParameterName(variableName)
                   .GetSourceType());
           completions.push_back(description);
 
@@ -1066,8 +1066,8 @@ class GD_CORE_API ExpressionCompletionFinder
       bool eagerlyCompleteIfExactMatch = false) {
     projectScopedContainers.ForEachIdentifierMatchingSearch(
         search,
-        [&](const gd::String& objectName,
-            const ObjectConfiguration* objectConfiguration) {
+        [&](const gd::String &objectName,
+            const ObjectConfiguration *objectConfiguration) {
           ExpressionCompletionDescription description(
               ExpressionCompletionDescription::Object,
               location.GetStartPosition(),
@@ -1077,7 +1077,7 @@ class GD_CORE_API ExpressionCompletionFinder
           description.SetType(type);
           completions.push_back(description);
         },
-        [&](const gd::String& variableName, const gd::Variable& variable) {
+        [&](const gd::String &variableName, const gd::Variable &variable) {
           ExpressionCompletionDescription description(
               ExpressionCompletionDescription::Variable,
               location.GetStartPosition(),
@@ -1086,7 +1086,7 @@ class GD_CORE_API ExpressionCompletionFinder
           description.SetVariableType(variable.GetType());
           description.SetVariableScope(
               projectScopedContainers.GetVariablesContainersList()
-                  .GetVariablesContainerFromVariableName(variableName)
+                  .GetVariablesContainerFromVariableOrPropertyOrParameterName(variableName)
                   .GetSourceType());
           completions.push_back(description);
 
@@ -1095,23 +1095,29 @@ class GD_CORE_API ExpressionCompletionFinder
                 variable, variableName, location);
           }
         },
-        [&](const gd::NamedPropertyDescriptor& property) {
-          ExpressionCompletionDescription description(
-              ExpressionCompletionDescription::Property,
-              location.GetStartPosition(),
-              location.GetEndPosition());
-          description.SetCompletion(property.GetName());
-          description.SetType(property.GetType());
-          completions.push_back(description);
+        [&](const gd::NamedPropertyDescriptor &property) {
+          auto propertyType = gd::ValueTypeMetadata::ConvertPropertyTypeToValueType(
+              property.GetType());
+          if (gd::ValueTypeMetadata::IsTypeValue("number", propertyType) ||
+              gd::ValueTypeMetadata::IsTypeValue("string", propertyType)) {
+            ExpressionCompletionDescription description(
+                ExpressionCompletionDescription::Property,
+                location.GetStartPosition(), location.GetEndPosition());
+            description.SetCompletion(property.GetName());
+            description.SetType(property.GetType());
+            completions.push_back(description);
+          }
         },
-        [&](const gd::ParameterMetadata& parameter) {
-          ExpressionCompletionDescription description(
-              ExpressionCompletionDescription::Parameter,
-              location.GetStartPosition(),
-              location.GetEndPosition());
-          description.SetCompletion(parameter.GetName());
-          description.SetType(parameter.GetType());
-          completions.push_back(description);
+        [&](const gd::ParameterMetadata &parameter) {
+          if (parameter.GetValueTypeMetadata().IsNumber() ||
+              parameter.GetValueTypeMetadata().IsString()) {
+            ExpressionCompletionDescription description(
+                ExpressionCompletionDescription::Parameter,
+                location.GetStartPosition(), location.GetEndPosition());
+            description.SetCompletion(parameter.GetName());
+            description.SetType(parameter.GetType());
+            completions.push_back(description);
+          }
         });
   }
 

Core/GDCore/IDE/Events/ExpressionNodeLocationFinder.h

@@ -33,8 +33,10 @@ class GD_CORE_API ExpressionNodeLocationFinder
    * \brief Initialize the finder to search at the specified position.
    */
   ExpressionNodeLocationFinder(size_t searchedPosition_)
-      : searchedPosition(searchedPosition_), foundNode(nullptr){};
-  virtual ~ExpressionNodeLocationFinder(){};
+      : searchedPosition(searchedPosition_),
+        foundNode(nullptr),
+        parentNode(nullptr) {};
+  virtual ~ExpressionNodeLocationFinder() {};
 
   /**
    * \brief Helper function to find the deepest node at the search position, if

Core/GDCore/IDE/Events/ExpressionTypeFinder.h

@@ -72,7 +72,7 @@ class GD_CORE_API ExpressionTypeFinder : public ExpressionParser2NodeWorker {
         child(nullptr) {};
 
   const gd::String &GetType() {
-    return gd::ParameterMetadata::GetExpressionValueType(type);
+    return gd::ValueTypeMetadata::GetExpressionPrimitiveValueType(type);
   };
 
   void OnVisitSubExpressionNode(SubExpressionNode& node) override {

Core/GDCore/IDE/Events/ExpressionValidator.cpp

@@ -68,19 +68,26 @@ size_t GetMaximumParametersNumber(
 
 bool ExpressionValidator::ValidateObjectVariableOrVariableOrProperty(
     const gd::IdentifierNode& identifier) {
+  return ValidateObjectVariableOrVariableOrProperty(identifier.identifierName, identifier.identifierNameLocation, identifier.childIdentifierName, identifier.childIdentifierNameLocation);
+}
+
+bool ExpressionValidator::ValidateObjectVariableOrVariableOrProperty(
+    const gd::String &identifierName,
+    const gd::ExpressionParserLocation identifierNameLocation,
+    const gd::String &childIdentifierName,
+    const gd::ExpressionParserLocation childIdentifierNameLocation) {
   auto validateVariableTypeForExpression =
-      [this, &identifier](gd::Variable::Type type) {
+      [this, &identifierNameLocation](gd::Variable::Type type) {
         // Collections type can't be used directly in expressions, a child
         // must be accessed.
         if (type == Variable::Structure) {
           RaiseTypeError(_("You need to specify the name of the child variable "
                            "to access. For example: `MyVariable.child`."),
-                         identifier.identifierNameLocation);
+                         identifierNameLocation);
         } else if (type == Variable::Array) {
           RaiseTypeError(_("You need to specify the name of the child variable "
                            "to access. For example: `MyVariable[0]`."),
-                         identifier.identifierNameLocation);
-
+                         identifierNameLocation);
         } else {
           // Number, string or boolean variables can be used in expressions.
           return;
@@ -96,38 +103,41 @@ bool ExpressionValidator::ValidateObjectVariableOrVariableOrProperty(
   // we consider this node will be of the type required by the parent.
   childType = parentType;
 
-  return projectScopedContainers.MatchIdentifierWithName<bool>(identifier.identifierName,
+  return projectScopedContainers.MatchIdentifierWithName<bool>(identifierName,
     [&]() {
       // This represents an object.
-      if (identifier.childIdentifierName.empty()) {
+      if (childIdentifierName.empty()) {
         RaiseTypeError(_("An object variable or expression should be entered."),
-                        identifier.identifierNameLocation);
+                        identifierNameLocation);
 
         return true; // We should have found a variable.
       }
 
-      auto variableExistence = objectsContainersList.HasObjectOrGroupWithVariableNamed(identifier.identifierName, identifier.childIdentifierName);
+      auto variableExistence =
+          objectsContainersList.HasObjectOrGroupWithVariableNamed(
+              identifierName, childIdentifierName);
 
       if (variableExistence == gd::ObjectsContainersList::DoesNotExist) {
         RaiseUndeclaredVariableError(_("This variable does not exist on this object or group."),
-                        identifier.childIdentifierNameLocation, identifier.childIdentifierName, identifier.identifierName);
+                        childIdentifierNameLocation, childIdentifierName, identifierName);
 
         return true; // We should have found a variable.
       }
       else if (variableExistence == gd::ObjectsContainersList::ExistsOnlyOnSomeObjectsOfTheGroup) {
         RaiseUndeclaredVariableError(_("This variable only exists on some objects of the group. It must be declared for all objects."),
-                        identifier.childIdentifierNameLocation, identifier.childIdentifierName, identifier.identifierName);
+                        childIdentifierNameLocation, childIdentifierName, identifierName);
 
         return true; // We should have found a variable.
       }
       else if (variableExistence == gd::ObjectsContainersList::GroupIsEmpty) {
         RaiseUndeclaredVariableError(_("This group is empty. Add an object to this group first."),
-                        identifier.identifierNameLocation, identifier.childIdentifierName, identifier.identifierName);
+                        identifierNameLocation, childIdentifierName, identifierName);
 
         return true; // We should have found a variable.
       }
 
-      auto variableType = objectsContainersList.GetTypeOfObjectOrGroupVariable(identifier.identifierName, identifier.childIdentifierName);
+      auto variableType = objectsContainersList.GetTypeOfObjectOrGroupVariable(
+          identifierName, childIdentifierName);
       ReadChildTypeFromVariable(variableType);
 
       return true; // We found a variable.
@@ -137,9 +147,9 @@ bool ExpressionValidator::ValidateObjectVariableOrVariableOrProperty(
       // Try to identify a declared variable with the name (and maybe the child
       // variable).
       const gd::Variable& variable =
-          variablesContainersList.Get(identifier.identifierName);
+          variablesContainersList.Get(identifierName);
 
-      if (identifier.childIdentifierName.empty()) {
+      if (childIdentifierName.empty()) {
         // Just the root variable is accessed, check it can be used in an
         // expression.
         validateVariableTypeForExpression(variable.GetType());
@@ -148,33 +158,38 @@ bool ExpressionValidator::ValidateObjectVariableOrVariableOrProperty(
         return true; // We found a variable.
       } else {
         // A child variable is accessed, check it can be used in an expression.
-        if (!variable.HasChild(identifier.childIdentifierName)) {
+        if (!variable.HasChild(childIdentifierName)) {
           RaiseTypeError(_("No child variable with this name found."),
-                        identifier.childIdentifierNameLocation);
+                        childIdentifierNameLocation);
 
           return true; // We should have found a variable.
         }
 
         const gd::Variable& childVariable =
-            variable.GetChild(identifier.childIdentifierName);
+            variable.GetChild(childIdentifierName);
         ReadChildTypeFromVariable(childVariable.GetType());
         return true; // We found a variable.
       }
     }, [&]() {
       // This is a property.
-      if (!identifier.childIdentifierName.empty()) {
+      if (!childIdentifierName.empty()) {
         RaiseTypeError(_("Accessing a child variable of a property is not possible - just write the property name."),
-            identifier.childIdentifierNameLocation);
+            childIdentifierNameLocation);
 
         return true; // We found a property, even if the child is not allowed.
       }
 
-      const gd::NamedPropertyDescriptor& property = propertiesContainersList.Get(identifier.identifierName).second;
+      const gd::NamedPropertyDescriptor &property =
+          propertiesContainersList.Get(identifierName).second;
 
       if (property.GetType() == "Number") {
-       childType = Type::Number;
+        childType = Type::Number;
       } else if (property.GetType() == "Boolean") {
-        // Nothing - we don't know the precise type (this could be used a string or as a number)
+        // Nothing - we don't know the precise type (this could be used a string
+        // or as a number)
+      } else if (property.GetType() == "Behavior") {
+        RaiseTypeError(_("Behaviors can't be used as a value in expressions."),
+                       identifierNameLocation);
       } else {
         // Assume type is String or equivalent.
         childType = Type::String;
@@ -183,14 +198,14 @@ bool ExpressionValidator::ValidateObjectVariableOrVariableOrProperty(
       return true; // We found a property.
     }, [&]() {
       // This is a parameter.
-      if (!identifier.childIdentifierName.empty()) {
+      if (!childIdentifierName.empty()) {
         RaiseTypeError(_("Accessing a child variable of a parameter is not possible - just write the parameter name."),
-            identifier.childIdentifierNameLocation);
+            childIdentifierNameLocation);
 
         return true; // We found a parameter, even if the child is not allowed.
       }
 
-      const auto& parameter = gd::ParameterMetadataTools::Get(parametersVectorsList, identifier.identifierName);
+      const auto& parameter = gd::ParameterMetadataTools::Get(parametersVectorsList, identifierName);
       const auto& valueTypeMetadata = parameter.GetValueTypeMetadata();
       if (valueTypeMetadata.IsNumber()) {
         childType = Type::Number;
@@ -200,7 +215,7 @@ bool ExpressionValidator::ValidateObjectVariableOrVariableOrProperty(
         // Nothing - we don't know the precise type (this could be used as a string or as a number).
       } else {
         RaiseTypeError(_("This parameter is not a string, number or boolean - it can't be used in an expression."),
-            identifier.identifierNameLocation);
+            identifierNameLocation);
 
         return true; // We found a parameter, even though the type is incompatible.
       }
@@ -445,10 +460,12 @@ const gd::String& ExpressionValidator::TypeToString(Type type) {
     case Type::NumberOrString:
       return numberOrStringTypeString;
     case Type::Variable:
-      return variableTypeString;
+      // This function is only used to display errors.
+      // Users don't care if it's legacy or not or
+      // if it allows properties and parameters.
+    case Type::VariableOrProperty:
+    case Type::VariableOrPropertyOrParameter:
     case Type::LegacyVariable:
-      // This function is only used to display error.
-      // Users don't care if it's legacy or not.
       return variableTypeString;
     case Type::Object:
       return objectTypeString;
@@ -478,8 +495,11 @@ ExpressionValidator::Type ExpressionValidator::StringToType(
           ExpressionValidator::variableTypeString, type)) {
     if (gd::ValueTypeMetadata::IsTypeLegacyPreScopedVariable(type)) {
       return Type::LegacyVariable;
-    }
-    else {
+    } else if (type == "variableOrProperty") {
+      return Type::VariableOrProperty;
+    } else if (type == "variableOrPropertyOrParameter") {
+      return Type::VariableOrPropertyOrParameter;
+    } else {
       return Type::Variable;
     }
   }

Core/GDCore/IDE/Events/ExpressionValidator.h

@@ -14,6 +14,7 @@
 #include "GDCore/Extensions/Metadata/ExpressionMetadata.h"
 #include "GDCore/Project/ProjectScopedContainers.h"
 #include "GDCore/Project/VariablesContainersList.h"
+#include "GDCore/Project/VariablesContainer.h"
 
 namespace gd {
 class Expression;
@@ -42,10 +43,12 @@ class GD_CORE_API ExpressionValidator : public ExpressionParser2NodeWorker {
                       const gd::String &extraInfo_ = "")
       : platform(platform_),
         projectScopedContainers(projectScopedContainers_),
-        parentType(StringToType(gd::ParameterMetadata::GetExpressionValueType(rootType_))),
+        parentType(StringToType(gd::ValueTypeMetadata::GetExpressionPrimitiveValueType(rootType_))),
         childType(Type::Unknown),
         forbidsUsageOfBracketsBecauseParentIsObject(false),
-        currentParameterExtraInfo(&extraInfo_) {};
+        currentParameterExtraInfo(&extraInfo_),
+        variableObjectName(),
+        variableObjectNameLocation() {};
   virtual ~ExpressionValidator(){};
 
   /**
@@ -200,10 +203,12 @@ class GD_CORE_API ExpressionValidator : public ExpressionParser2NodeWorker {
   void OnVisitVariableNode(VariableNode& node) override {
     ReportAnyError(node);
 
-    if (parentType == Type::Variable) {
+    if (parentType == Type::Variable ||
+        parentType == Type::VariableOrProperty ||
+        parentType == Type::VariableOrPropertyOrParameter) {
       childType = parentType;
 
-      CheckVariableExistence(node.location, node.name);
+      CheckVariableExistence(node.location, node.name, node.child != nullptr);
       if (node.child) {
         node.child->Visit(*this);
       }
@@ -213,7 +218,8 @@ class GD_CORE_API ExpressionValidator : public ExpressionParser2NodeWorker {
       if (node.child) {
         node.child->Visit(*this);
       }
-    } else if (parentType == Type::String || parentType == Type::Number || parentType == Type::NumberOrString) {
+    } else if (parentType == Type::String || parentType == Type::Number ||
+               parentType == Type::NumberOrString) {
       // The node represents a variable or an object variable in an expression waiting for its *value* to be returned.
       childType = parentType;
 
@@ -225,7 +231,8 @@ class GD_CORE_API ExpressionValidator : public ExpressionParser2NodeWorker {
       projectScopedContainers.MatchIdentifierWithName<void>(node.name,
         [&]() {
           // This represents an object.
-
+          variableObjectName = node.name;
+          variableObjectNameLocation = node.nameLocation;
           // While understood by the parser, it's forbidden to use the bracket notation just after
           // an object name (`MyObject["MyVariable"]`).
           forbidsUsageOfBracketsBecauseParentIsObject = true;
@@ -264,7 +271,13 @@ class GD_CORE_API ExpressionValidator : public ExpressionParser2NodeWorker {
   }
   void OnVisitVariableAccessorNode(VariableAccessorNode& node) override {
     ReportAnyError(node);
-
+    // TODO Also check child-variables existence on a path with only VariableAccessor to raise non-fatal errors.
+    if (!variableObjectName.empty()) {
+      ValidateObjectVariableOrVariableOrProperty(variableObjectName,
+                                                 variableObjectNameLocation,
+                                                 node.name, node.nameLocation);
+      variableObjectName = "";
+    }
     // In the case we accessed an object variable (`MyObject.MyVariable`),
     // brackets can now be used (`MyObject.MyVariable["MyChildVariable"]` is now valid).
     forbidsUsageOfBracketsBecauseParentIsObject = false;
@@ -277,6 +290,7 @@ class GD_CORE_API ExpressionValidator : public ExpressionParser2NodeWorker {
       VariableBracketAccessorNode& node) override {
     ReportAnyError(node);
 
+    variableObjectName = "";
     if (forbidsUsageOfBracketsBecauseParentIsObject) {
       RaiseError(gd::ExpressionParserError::ErrorType::BracketsNotAllowedForObjects,
                  _("You can't use the brackets to access an object variable. "
@@ -325,11 +339,12 @@ class GD_CORE_API ExpressionValidator : public ExpressionParser2NodeWorker {
             _("You must enter a number or a text, wrapped inside double quotes (example: \"Hello world\"), or a variable name."),
             node.location);
       }
-    }
-    else if (parentType == Type::Variable) {
-      CheckVariableExistence(node.location, node.identifierName);
-    }
-    else if (parentType != Type::Object && parentType != Type::LegacyVariable) {
+    } else if (parentType == Type::Variable ||
+               parentType == Type::VariableOrProperty ||
+               parentType == Type::VariableOrPropertyOrParameter) {
+      CheckVariableExistence(node.location, node.identifierName, !node.childIdentifierName.empty());
+    } else if (parentType != Type::Object &&
+               parentType != Type::LegacyVariable) {
       // It can't happen.
       RaiseTypeError(
           _("You've entered a name, but this type was expected:") + " " + TypeToString(parentType),
@@ -365,13 +380,31 @@ class GD_CORE_API ExpressionValidator : public ExpressionParser2NodeWorker {
     childType = Type::Empty;
   }
 
- private:
-  enum Type {Unknown = 0, Number, String, NumberOrString, Variable, LegacyVariable, Object, Empty};
+private:
+  enum Type {
+    Unknown = 0,
+    Number,
+    String,
+    NumberOrString,
+    Variable,
+    LegacyVariable,
+    Object,
+    Empty,
+    VariableOrProperty,
+    VariableOrPropertyOrParameter
+  };
   Type ValidateFunction(const gd::FunctionCallNode& function);
   bool ValidateObjectVariableOrVariableOrProperty(const gd::IdentifierNode& identifier);
+  bool ValidateObjectVariableOrVariableOrProperty(
+      const gd::String &identifierName,
+      const gd::ExpressionParserLocation identifierNameLocation,
+      const gd::String &childIdentifierName,
+      const gd::ExpressionParserLocation childIdentifierNameLocation);
 
-  void CheckVariableExistence(const ExpressionParserLocation &location, const gd::String& name) {
-    if (!currentParameterExtraInfo || *currentParameterExtraInfo != "AllowUndeclaredVariable") {
+  void CheckVariableExistence(const ExpressionParserLocation &location,
+                              const gd::String &name, bool hasChild) {
+    if (!currentParameterExtraInfo ||
+        *currentParameterExtraInfo != "AllowUndeclaredVariable") {
       projectScopedContainers.MatchIdentifierWithName<void>(
           name,
           [&]() {
@@ -386,19 +419,28 @@ class GD_CORE_API ExpressionValidator : public ExpressionParser2NodeWorker {
           },
           [&]() {
             // This is a property.
-            // This error won't happen unless the priority is changed.
-            RaiseVariableNameCollisionError(
-                _("This variable has the same name as a property. Consider "
-                  "renaming one or the other."),
-                location, name);
+            if (parentType != Type::VariableOrProperty &&
+                parentType != Type::VariableOrPropertyOrParameter) {
+              RaiseVariableNameCollisionError(
+                  _("This variable has the same name as a property. Consider "
+                    "renaming one or the other."),
+                  location, name);
+            } else if (hasChild) {
+              RaiseMalformedVariableParameter(
+                  _("Properties can't have children."), location, name);
+            }
           },
           [&]() {
             // This is a parameter.
-            // This error won't happen unless the priority is changed.
-            RaiseVariableNameCollisionError(
-                _("This variable has the same name as a parameter. Consider "
-                  "renaming one or the other."),
-                location, name);
+            if (parentType != Type::VariableOrPropertyOrParameter) {
+              RaiseVariableNameCollisionError(
+                  _("This variable has the same name as a parameter. Consider "
+                    "renaming one or the other."),
+                  location, name);
+            } else if (hasChild) {
+              RaiseMalformedVariableParameter(
+                  _("Properties can't have children."), location, name);
+            }
           },
           [&]() {
             // This is something else.
@@ -460,6 +502,13 @@ class GD_CORE_API ExpressionValidator : public ExpressionParser2NodeWorker {
                message, location, false, variableName, objectName);
   }
 
+  void RaiseMalformedVariableParameter(const gd::String &message,
+                                   const ExpressionParserLocation &location,
+                                   const gd::String &variableName) {
+    RaiseError(gd::ExpressionParserError::ErrorType::MalformedVariableParameter,
+               message, location, true, variableName, "");
+  }
+
   void RaiseTypeError(const gd::String &message,
                       const ExpressionParserLocation &location,
                       bool isFatal = true) {
@@ -505,6 +554,8 @@ class GD_CORE_API ExpressionValidator : public ExpressionParser2NodeWorker {
   Type childType; ///< The type "discovered" down the tree and passed up.
   Type parentType; ///< The type "required" by the top of the tree.
   bool forbidsUsageOfBracketsBecauseParentIsObject;
+  gd::String variableObjectName;
+  gd::ExpressionParserLocation variableObjectNameLocation;
   const gd::String *currentParameterExtraInfo;
   const gd::Platform &platform;
   const gd::ProjectScopedContainers &projectScopedContainers;

Core/GDCore/IDE/Events/ExpressionVariablePathFinder.h

@@ -215,7 +215,7 @@ class GD_CORE_API ExpressionVariablePathFinder
             if (projectScopedContainers.GetVariablesContainersList().Has(identifier)) {
               variablesContainer =
                   &(projectScopedContainers.GetVariablesContainersList()
-                        .GetVariablesContainerFromVariableName(identifier));
+                        .GetVariablesContainerFromVariableOrPropertyOrParameterName(identifier));
               variableName = identifier;
               if (childIdentifier) {
                 childVariableNames.push_back(*childIdentifier);
@@ -223,12 +223,28 @@ class GD_CORE_API ExpressionVariablePathFinder
             }
           },
           [&]() {
-            // Ignore properties here.
-            // There is no support for "children" of properties.
+            // This is a property.
+            if (parameterType != "objectvar" &&
+                    projectScopedContainers.GetVariablesContainersList().Has(
+                        identifier)) {
+              variablesContainer =
+                  &(projectScopedContainers.GetVariablesContainersList()
+                        .GetVariablesContainerFromVariableOrPropertyOrParameterName(identifier));
+              variableName = identifier;
+              // There is no support for "children" of properties.
+            }
           },
           [&]() {
-            // Ignore parameters here.
-            // There is no support for "children" of parameters.
+            // This is a parameter.
+            if (parameterType != "objectvar" &&
+                projectScopedContainers.GetVariablesContainersList().Has(
+                    identifier)) {
+              variablesContainer =
+                  &(projectScopedContainers.GetVariablesContainersList()
+                        .GetVariablesContainerFromVariableOrPropertyOrParameterName(identifier));
+              variableName = identifier;
+              // There is no support for "children" of parameters.
+            }
           },
           [&]() {
             // Ignore unrecognised identifiers here.

Core/GDCore/IDE/Events/ExpressionsParameterMover.h

@@ -74,8 +74,8 @@ class GD_CORE_API ExpressionsParameterMover
 
   const gd::Platform &platform;
   gd::String functionName;
-  std::size_t oldIndex;
-  std::size_t newIndex;
+  std::size_t oldIndex = 0;
+  std::size_t newIndex = 0;
   gd::String behaviorType;
   gd::String objectType;
 };

Core/GDCore/IDE/Events/LeaderboardIdRenamer.cpp

@@ -0,0 +1,76 @@
+#include "LeaderboardIdRenamer.h"
+
+#include <map>
+#include <memory>
+#include <vector>
+
+#include "GDCore/Events/Event.h"
+#include "GDCore/Events/EventsList.h"
+#include "GDCore/Extensions/Metadata/InstructionMetadata.h"
+#include "GDCore/Extensions/Metadata/MetadataProvider.h"
+#include "GDCore/Project/Behavior.h"
+#include "GDCore/Project/Layout.h"
+#include "GDCore/Project/Object.h"
+#include "GDCore/Project/Project.h"
+#include "GDCore/Project/PropertyDescriptor.h"
+#include "GDCore/String.h"
+
+namespace gd {
+
+void LeaderboardIdRenamer::DoVisitObject(gd::Object &object) {
+  for (auto &pair : object.GetConfiguration().GetProperties()) {
+    auto &propertyName = pair.first;
+    auto &property = pair.second;
+    if (property.GetType() == "LeaderboardId") {
+      auto &leaderboardId = property.GetValue();
+
+      allLeaderboardIds.insert(leaderboardId);
+
+      if (leaderboardIdMap.find(leaderboardId) != leaderboardIdMap.end()) {
+        object.GetConfiguration().UpdateProperty(
+            propertyName, leaderboardIdMap[leaderboardId]);
+      }
+    }
+  }
+};
+
+void LeaderboardIdRenamer::DoVisitBehavior(gd::Behavior &behavior) {};
+
+bool LeaderboardIdRenamer::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) {
+    const gd::ParameterMetadata parameter = instrInfo.GetParameter(i);
+
+    if (parameter.GetType() != "leaderboardId") {
+      continue;
+    }
+    const gd::String leaderboardIdExpression =
+        instruction.GetParameter(i).GetPlainString();
+    if (leaderboardIdExpression[0] != '"' ||
+        leaderboardIdExpression[leaderboardIdExpression.size() - 1] != '"') {
+      continue;
+    }
+    const gd::String leaderboardId =
+        leaderboardIdExpression.substr(1, leaderboardIdExpression.size() - 2);
+
+    allLeaderboardIds.insert(leaderboardId);
+
+    if (leaderboardIdMap.find(leaderboardId) != leaderboardIdMap.end()) {
+      instruction.SetParameter(i,
+                               "\"" + leaderboardIdMap[leaderboardId] + "\"");
+    }
+  }
+  return false;
+}
+
+LeaderboardIdRenamer::~LeaderboardIdRenamer() {}
+
+}  // namespace gd

Core/GDCore/IDE/Events/LeaderboardIdRenamer.h

@@ -0,0 +1,50 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+
+#pragma once
+#include <map>
+
+#include "GDCore/IDE/Project/ArbitraryObjectsWorker.h"
+#include "GDCore/IDE/Events/ArbitraryEventsWorker.h"
+#include "GDCore/String.h"
+
+namespace gd {
+class Object;
+class Behavior;
+}  // namespace gd
+
+namespace gd {
+
+class GD_CORE_API LeaderboardIdRenamer : public ArbitraryObjectsWorker, public ArbitraryEventsWorker {
+ public:
+  LeaderboardIdRenamer(gd::Project& project_): project(project_) {};
+  virtual ~LeaderboardIdRenamer();
+
+  /**
+   * Set the leaderboard identifiers to be replaced.
+   */
+  void SetLeaderboardIdsToReplace(const std::map<gd::String, gd::String>& leaderboardIdMap_) {
+    leaderboardIdMap = leaderboardIdMap_;
+  }
+
+  /**
+   * Return the all the leaderboard identifiers found in the project.
+   */
+  const std::set<gd::String>& GetAllLeaderboardIds() const {
+    return allLeaderboardIds;
+  }
+
+ private:
+  bool DoVisitInstruction(gd::Instruction& instruction, bool isCondition) override;
+  void DoVisitObject(gd::Object& object) override;
+  void DoVisitBehavior(gd::Behavior& behavior) override;
+
+  std::map<gd::String, gd::String> leaderboardIdMap;
+  std::set<gd::String> allLeaderboardIds;
+  gd::Project& project;
+};
+
+};  // namespace gd

Core/GDCore/IDE/Events/UsedExtensionsFinder.cpp

@@ -13,6 +13,18 @@
 
 namespace gd {
 
+void UsedExtensionsResult::AddUsedExtension(const gd::PlatformExtension& extension) {
+  usedExtensions.insert(extension.GetName());
+
+  usedSourceFiles.insert(usedSourceFiles.end(),
+                         extension.GetAllSourceFiles().begin(),
+                         extension.GetAllSourceFiles().end());
+}
+
+void UsedExtensionsResult::AddUsedBuiltinExtension(const gd::String& extensionName) {
+  usedExtensions.insert(extensionName);
+}
+
 const UsedExtensionsResult UsedExtensionsFinder::ScanProject(gd::Project& project) {
   UsedExtensionsFinder worker(project);
   gd::ProjectBrowserHelper::ExposeProjectObjects(project, worker);
@@ -28,9 +40,9 @@ void UsedExtensionsFinder::DoVisitObject(gd::Object &object) {
   if (metadata.GetMetadata().IsRenderedIn3D()) {
     result.MarkAsHaving3DObjects();
   }
-  result.GetUsedExtensions().insert(metadata.GetExtension().GetName());
+  result.AddUsedExtension(metadata.GetExtension());
   for (auto &&includeFile : metadata.GetMetadata().includeFiles) {
-    result.GetUsedIncludeFiles().insert(includeFile);
+    result.AddUsedIncludeFiles(includeFile);
   }
 };
 
@@ -39,12 +51,12 @@ void UsedExtensionsFinder::DoVisitObject(gd::Object &object) {
 void UsedExtensionsFinder::DoVisitBehavior(gd::Behavior &behavior) {
   auto metadata = gd::MetadataProvider::GetExtensionAndBehaviorMetadata(
       project.GetCurrentPlatform(), behavior.GetTypeName());
-  result.GetUsedExtensions().insert(metadata.GetExtension().GetName());
+  result.AddUsedExtension(metadata.GetExtension());
   for (auto &&includeFile : metadata.GetMetadata().includeFiles) {
-    result.GetUsedIncludeFiles().insert(includeFile);
+    result.AddUsedIncludeFiles(includeFile);
   }
   for (auto &&includeFile : metadata.GetMetadata().requiredFiles) {
-    result.GetUsedRequiredFiles().insert(includeFile);
+    result.AddUsedRequiredFiles(includeFile);
   }
 };
 
@@ -57,9 +69,16 @@ bool UsedExtensionsFinder::DoVisitInstruction(gd::Instruction& instruction,
                         project.GetCurrentPlatform(), instruction.GetType())
                   : gd::MetadataProvider::GetExtensionAndActionMetadata(
                         project.GetCurrentPlatform(), instruction.GetType());
-  result.GetUsedExtensions().insert(metadata.GetExtension().GetName());
-  for (auto&& includeFile : metadata.GetMetadata().GetIncludeFiles()) {
-    result.GetUsedIncludeFiles().insert(includeFile);
+  // Unused event-based objects or events-based behaviors may use object and
+  // behavior instructions that should not be detected as extension usage.
+  // The extension of actually used objects and behaviors will be detected on
+  // scene objects. This is why object or behavior instructions usually don't
+  // have any import.
+  if (!metadata.GetMetadata().GetIncludeFiles().empty()) {
+    result.AddUsedExtension(metadata.GetExtension());
+    for (auto &&includeFile : metadata.GetMetadata().GetIncludeFiles()) {
+      result.AddUsedIncludeFiles(includeFile);
+    }
   }
 
   gd::ParameterMetadataTools::IterateOverParameters(
@@ -77,7 +96,7 @@ bool UsedExtensionsFinder::DoVisitInstruction(gd::Instruction& instruction,
       rootType = "number";
       parameterValue.GetRootNode()->Visit(*this);
     } else if (gd::ParameterMetadata::IsExpression("variable", parameterType))
-      result.GetUsedExtensions().insert("BuiltinVariables");
+      result.AddUsedBuiltinExtension("BuiltinVariables");
   });
 
   return false;
@@ -110,7 +129,7 @@ void UsedExtensionsFinder::OnVisitUnaryOperatorNode(UnaryOperatorNode& node) {
 
 // Add variable extension and visit sub-expressions on variable nodes
 void UsedExtensionsFinder::OnVisitVariableNode(VariableNode& node) {
-  result.GetUsedExtensions().insert("BuiltinVariables");
+  result.AddUsedBuiltinExtension("BuiltinVariables");
 
   auto type = gd::ExpressionTypeFinder::GetType(
       project.GetCurrentPlatform(), GetProjectScopedContainers(), rootType, node);
@@ -123,9 +142,9 @@ void UsedExtensionsFinder::OnVisitVariableNode(VariableNode& node) {
         // This represents an object.
         auto metadata = gd::MetadataProvider::GetExtensionAndObjectMetadata(
           project.GetCurrentPlatform(), node.name);
-        result.GetUsedExtensions().insert(metadata.GetExtension().GetName());
+        result.AddUsedExtension(metadata.GetExtension());
         for (auto &&includeFile : metadata.GetMetadata().includeFiles) {
-          result.GetUsedIncludeFiles().insert(includeFile);
+          result.AddUsedIncludeFiles(includeFile);
         }
       }, [&]() {
         // This is a variable.
@@ -143,13 +162,13 @@ void UsedExtensionsFinder::OnVisitVariableNode(VariableNode& node) {
 
 void UsedExtensionsFinder::OnVisitVariableAccessorNode(
     VariableAccessorNode& node) {
-  result.GetUsedExtensions().insert("BuiltinVariables");
+  result.AddUsedBuiltinExtension("BuiltinVariables");
   if (node.child) node.child->Visit(*this);
 };
 
 void UsedExtensionsFinder::OnVisitVariableBracketAccessorNode(
     VariableBracketAccessorNode& node) {
-  result.GetUsedExtensions().insert("BuiltinVariables");
+  result.AddUsedBuiltinExtension("BuiltinVariables");
   node.expression->Visit(*this);
   if (node.child) node.child->Visit(*this);
 };
@@ -163,9 +182,9 @@ void UsedExtensionsFinder::OnVisitIdentifierNode(IdentifierNode &node) {
     // An object or object variable is used.
     auto metadata = gd::MetadataProvider::GetExtensionAndObjectMetadata(
         project.GetCurrentPlatform(), node.identifierName);
-    result.GetUsedExtensions().insert(metadata.GetExtension().GetName());
+    result.AddUsedExtension(metadata.GetExtension());
     for (auto &&includeFile : metadata.GetMetadata().includeFiles) {
-      result.GetUsedIncludeFiles().insert(includeFile);
+      result.AddUsedIncludeFiles(includeFile);
     }
   }
 };
@@ -187,9 +206,16 @@ void UsedExtensionsFinder::OnVisitFunctionCallNode(FunctionCallNode& node) {
       return;
   }
 
-  result.GetUsedExtensions().insert(metadata.GetExtension().GetName());
-  for (auto&& includeFile : metadata.GetMetadata().GetIncludeFiles()) {
-    result.GetUsedIncludeFiles().insert(includeFile);
+  // Unused event-based objects or events-based behaviors may use object and
+  // behavior expressions that should not be detected as extension usage.
+  // The extension of actually used objects and behaviors will be detected on
+  // scene objects. This is why object or behavior expressions usually don't
+  // have any import.
+  if (!metadata.GetMetadata().GetIncludeFiles().empty()) {
+    result.AddUsedExtension(metadata.GetExtension());
+    for (auto &&includeFile : metadata.GetMetadata().GetIncludeFiles()) {
+      result.AddUsedIncludeFiles(includeFile);
+    }
   }
 };
 

Core/GDCore/IDE/Events/UsedExtensionsFinder.h

@@ -9,6 +9,8 @@
 #include <set>
 
 #include "GDCore/Events/Parsers/ExpressionParser2NodeWorker.h"
+#include "GDCore/Extensions/Metadata/SourceFileMetadata.h"
+#include "GDCore/Extensions/PlatformExtension.h"
 #include "GDCore/IDE/Events/ArbitraryEventsWorker.h"
 #include "GDCore/IDE/Project/ArbitraryObjectsWorker.h"
 #include "GDCore/String.h"
@@ -44,6 +46,10 @@ public:
     return usedRequiredFiles;
   }
 
+  const std::vector<gd::SourceFileMetadata>& GetUsedSourceFiles() const {
+    return usedSourceFiles;
+  }
+
   /**
    * \brief Return true when at least 1 object uses the 3D renderer.
    */
@@ -51,20 +57,10 @@ public:
     return has3DObjects;
   }
 
-  /**
-   * The extensions used by the project (or part of it).
-   */
-  std::set<gd::String> &GetUsedExtensions() { return usedExtensions; }
-
-  /**
-   * The include files used at runtime by the project (or part of it).
-   */
-  std::set<gd::String> &GetUsedIncludeFiles() { return usedIncludeFiles; }
-
-  /**
-   * The additional files required at runtime by the project (or part of it).
-   */
-  std::set<gd::String> &GetUsedRequiredFiles() { return usedRequiredFiles; }
+  void AddUsedExtension(const gd::PlatformExtension& extension);
+  void AddUsedBuiltinExtension(const gd::String& extensionName);
+  void AddUsedIncludeFiles(const gd::String& includeFile) { usedIncludeFiles.insert(includeFile); }
+  void AddUsedRequiredFiles(const gd::String& requiredFile) { usedRequiredFiles.insert(requiredFile); }
 
   void MarkAsHaving3DObjects() {
     has3DObjects = true;
@@ -74,6 +70,7 @@ private:
   std::set<gd::String> usedExtensions;
   std::set<gd::String> usedIncludeFiles;
   std::set<gd::String> usedRequiredFiles;
+  std::vector<gd::SourceFileMetadata> usedSourceFiles;
   bool has3DObjects = false;
 };
 

Core/GDCore/IDE/EventsFunctionTools.cpp

@@ -9,7 +9,10 @@
 #include "GDCore/Extensions/Metadata/ParameterMetadataTools.h"
 #include "GDCore/Project/EventsBasedBehavior.h"
 #include "GDCore/Project/EventsBasedObject.h"
-//#include "GDCore/Project/ObjectsContainer.h"
+#include "GDCore/Project/ObjectsContainer.h"
+#include "GDCore/Project/ParameterMetadataContainer.h"
+#include "GDCore/Project/PropertiesContainer.h"
+#include "GDCore/Project/VariablesContainer.h"
 #include "GDCore/Project/EventsFunction.h"
 #include "GDCore/Project/Object.h"
 #include "GDCore/Project/Project.h"
@@ -24,15 +27,16 @@ void EventsFunctionTools::FreeEventsFunctionToObjectsContainer(
     const gd::EventsFunction& eventsFunction,
     gd::ObjectsContainer& outputObjectsContainer) {
   // Functions scope for objects is defined according
-  // to parameters
-  outputObjectsContainer.GetObjects().clear();
-  outputObjectsContainer.GetObjectGroups().Clear();
-
+  // to parameters.
   auto &parameters = eventsFunction.GetParametersForEvents(functionContainer);
   gd::ParameterMetadataTools::ParametersToObjectsContainer(
       project,
       parameters,
       outputObjectsContainer);
+
+  // TODO: in theory we should ensure stability of the groups across calls
+  // to this function. BUT groups in functions should probably have never been
+  // supported, so we're phasing this out in the UI.
   outputObjectsContainer.GetObjectGroups() = eventsFunction.GetObjectGroups();
 }
 
@@ -97,25 +101,73 @@ void EventsFunctionTools::ObjectEventsFunctionToObjectsContainer(
                   "for the parent. ");
     return;
   }
-
-  gd::EventsFunctionTools::CopyEventsBasedObjectChildrenToObjectsContainer(
-      eventsBasedObject, outputObjectsContainer);
 }
 
-void EventsFunctionTools::CopyEventsBasedObjectChildrenToObjectsContainer(
-    const gd::EventsBasedObject& eventsBasedObject,
-    gd::ObjectsContainer& outputObjectsContainer) {
-  auto &children = eventsBasedObject.GetObjects().GetObjects();
-  for (auto &childObject : children) {
-    auto child = childObject.get();
-    outputObjectsContainer.InsertObject(
-        *child, outputObjectsContainer.GetObjectsCount());
+void EventsFunctionTools::ParametersToVariablesContainer(
+    const ParameterMetadataContainer &parameters,
+    gd::VariablesContainer &outputVariablesContainer) {
+  if (outputVariablesContainer.GetSourceType() !=
+      gd::VariablesContainer::SourceType::Parameters) {
+    throw std::logic_error("Tried to generate a variables container from "
+                           "parameters with the wrong source type.");
   }
-  auto &childrenGroups = eventsBasedObject.GetObjects().GetObjectGroups();
-  for (size_t index = 0; index < childrenGroups.Count(); ++index) {
-    auto &childGroup = childrenGroups.Get(index);
-    outputObjectsContainer.GetObjectGroups().Insert(
-        childGroup, outputObjectsContainer.GetObjectGroups().Count());
+  outputVariablesContainer.Clear();
+
+  gd::String lastObjectName;
+  for (std::size_t i = 0; i < parameters.GetParametersCount(); ++i) {
+    const auto &parameter = parameters.GetParameter(i);
+    if (parameter.GetName().empty())
+      continue;
+
+    auto &valueTypeMetadata = parameter.GetValueTypeMetadata();
+    if (valueTypeMetadata.IsNumber()) {
+      auto &variable = outputVariablesContainer.InsertNew(
+          parameter.GetName(), outputVariablesContainer.Count());
+      variable.SetValue(0);
+    } else if (valueTypeMetadata.IsString()) {
+      auto &variable = outputVariablesContainer.InsertNew(
+          parameter.GetName(), outputVariablesContainer.Count());
+      variable.SetString("");
+    } else if (valueTypeMetadata.IsBoolean()) {
+      auto &variable = outputVariablesContainer.InsertNew(
+          parameter.GetName(), outputVariablesContainer.Count());
+      variable.SetBool(false);
+    }
+  }
+}
+
+void EventsFunctionTools::PropertiesToVariablesContainer(
+    const PropertiesContainer &properties,
+    gd::VariablesContainer &outputVariablesContainer) {
+  if (outputVariablesContainer.GetSourceType() !=
+      gd::VariablesContainer::SourceType::Properties) {
+    throw std::logic_error("Tried to generate a variables container from "
+                           "properties with the wrong source type.");
+  }
+  outputVariablesContainer.Clear();
+
+  gd::String lastObjectName;
+  for (std::size_t i = 0; i < properties.GetCount(); ++i) {
+    const auto &property = properties.Get(i);
+    if (property.GetName().empty())
+      continue;
+
+    auto &propertyType = gd::ValueTypeMetadata::GetPrimitiveValueType(
+        gd::ValueTypeMetadata::ConvertPropertyTypeToValueType(
+            property.GetType()));
+    if (propertyType == "number") {
+      auto &variable = outputVariablesContainer.InsertNew(
+          property.GetName(), outputVariablesContainer.Count());
+      variable.SetValue(0);
+    } else if (propertyType == "string") {
+      auto &variable = outputVariablesContainer.InsertNew(
+          property.GetName(), outputVariablesContainer.Count());
+      variable.SetString("");
+    } else if (propertyType == "boolean") {
+      auto &variable = outputVariablesContainer.InsertNew(
+          property.GetName(), outputVariablesContainer.Count());
+      variable.SetBool(false);
+    }
   }
 }
 

Core/GDCore/IDE/EventsFunctionTools.h

@@ -12,6 +12,9 @@ namespace gd {
 class Project;
 class EventsFunctionsContainer;
 class ObjectsContainer;
+class ParameterMetadataContainer;
+class PropertiesContainer;
+class VariablesContainer;
 class ParameterMetadata;
 class EventsFunction;
 class EventsBasedBehavior;
@@ -69,8 +72,12 @@ class GD_CORE_API EventsFunctionTools {
       const gd::EventsFunction& eventsFunction,
       gd::ObjectsContainer& outputObjectsContainer);
 
-  static void CopyEventsBasedObjectChildrenToObjectsContainer(
-      const gd::EventsBasedObject &eventsBasedObject,
-      gd::ObjectsContainer &outputObjectsContainer);
+  static void ParametersToVariablesContainer(
+      const ParameterMetadataContainer &parameters,
+      gd::VariablesContainer &outputVariablesContainer);
+
+  static void PropertiesToVariablesContainer(
+      const PropertiesContainer &properties,
+      gd::VariablesContainer &outputVariablesContainer);
 };
 }  // namespace gd

Core/GDCore/IDE/ExportedDependencyResolver.h

@@ -4,6 +4,7 @@
 #include "GDCore/Extensions/Metadata/DependencyMetadata.h"
 #include "GDCore/Extensions/PlatformExtension.h"
 #include "GDCore/Project/Project.h"
+#include "GDCore/Extensions/Platform.h"
 
 namespace gd {
 

Core/GDCore/IDE/Project/ArbitraryResourceWorker.cpp

@@ -62,6 +62,11 @@ void ArbitraryResourceWorker::ExposeSpine(gd::String& resourceName){
     // do.
 };
 
+void ArbitraryResourceWorker::ExposeJavaScript(gd::String& resourceName){
+    // Nothing to do by default - each child class can define here the action to
+    // do.
+};
+
 void ArbitraryResourceWorker::ExposeVideo(gd::String& videoName){
     // Nothing to do by default - each child class can define here the action to
     // do.
@@ -195,6 +200,10 @@ void ArbitraryResourceWorker::ExposeResourceWithType(
     ExposeSpine(resourceName);
     return;
   }
+  if (resourceType == "javascript") {
+    ExposeJavaScript(resourceName);
+    return;
+  }
   gd::LogError("Unexpected resource type: " + resourceType + " for: " + resourceName);
   return;
 }
@@ -293,7 +302,7 @@ void ResourceWorkerInObjectsWorker::DoVisitObject(gd::Object &object) {
 };
 
 void ResourceWorkerInObjectsWorker::DoVisitBehavior(gd::Behavior &behavior){
-    // TODO Allow behaviors to expose resources
+  behavior.ExposeResources(worker);
 };
 
 gd::ResourceWorkerInObjectsWorker

Core/GDCore/IDE/Project/ArbitraryResourceWorker.h

@@ -96,7 +96,7 @@ public:
    * \brief Expose a 3D model, which is always a reference to a "model3D" resource.
    */
   virtual void ExposeModel3D(gd::String &resourceName);
-  
+
   /**
    * \brief Expose an atlas, which is always a reference to a "atlas" resource.
    */
@@ -112,6 +112,11 @@ public:
    */
   virtual void ExposeVideo(gd::String &videoName);
 
+  /**
+   * \brief Expose a JavaScript file, which is always a reference to a "javascript" resource.
+   */
+  virtual void ExposeJavaScript(gd::String &javaScriptName);
+
   /**
    * \brief Expose a bitmap font, which is always a reference to a "bitmapFont" resource.
    */

Core/GDCore/IDE/Project/AssetResourcePathCleaner.cpp

@@ -38,6 +38,10 @@ void AssetResourcePathCleaner::ExposeVideo(gd::String &videoName) {
   ExposeResourceAsFile(videoName);
 }
 
+void AssetResourcePathCleaner::ExposeJavaScript(gd::String &javaScriptResourceName) {
+  ExposeResourceAsFile(javaScriptResourceName);
+}
+
 void AssetResourcePathCleaner::ExposeBitmapFont(gd::String &bitmapFontName) {
   ExposeResourceAsFile(bitmapFontName);
 }

Core/GDCore/IDE/Project/AssetResourcePathCleaner.h

@@ -46,6 +46,7 @@ public:
   void ExposeTileset(gd::String &tilesetName) override;
   void ExposeVideo(gd::String &videoName) override;
   void ExposeBitmapFont(gd::String &bitmapFontName) override;
+  void ExposeJavaScript(gd::String &javaScriptResourceName) override;
   void ExposeFile(gd::String &resource) override;
 
 protected:

Core/GDCore/IDE/Project/ObjectsUsingResourceCollector.h

@@ -73,6 +73,9 @@ public:
   virtual void ExposeVideo(gd::String& otherResourceName) override {
     MatchResourceName(otherResourceName);
   };
+  virtual void ExposeJavaScript(gd::String& otherResourceName) override {
+    MatchResourceName(otherResourceName);
+  };
   virtual void ExposeBitmapFont(gd::String& otherResourceName) override {
     MatchResourceName(otherResourceName);
   };

Core/GDCore/IDE/Project/ResourcesInUseHelper.h

@@ -60,6 +60,7 @@ public:
     if (resourceType == "model3D") return allModel3Ds;
     if (resourceType == "atlas") return allAtlases;
     if (resourceType == "spine") return allSpines;
+    if (resourceType == "javascript") return allJavaScripts;
 
     return emptyResources;
   };
@@ -88,6 +89,9 @@ public:
   virtual void ExposeVideo(gd::String& resourceName) override {
     allVideos.insert(resourceName);
   };
+  virtual void ExposeJavaScript(gd::String& resourceName) override {
+    allJavaScripts.insert(resourceName);
+  };
   virtual void ExposeBitmapFont(gd::String& resourceName) override {
     allBitmapFonts.insert(resourceName);
   };
@@ -114,6 +118,7 @@ public:
   std::set<gd::String> allModel3Ds;
   std::set<gd::String> allAtlases;
   std::set<gd::String> allSpines;
+  std::set<gd::String> allJavaScripts;
   std::set<gd::String> emptyResources;
 
   static const std::vector<gd::String> resourceTypes;

Core/GDCore/IDE/Project/ResourcesRenamer.h

@@ -59,6 +59,9 @@ class ResourcesRenamer : public gd::ArbitraryResourceWorker {
   virtual void ExposeVideo(gd::String& videoResourceName) override {
     RenameIfNeeded(videoResourceName);
   };
+  virtual void ExposeJavaScript(gd::String& javaScriptResourceName) override {
+    RenameIfNeeded(javaScriptResourceName);
+  };
   virtual void ExposeBitmapFont(gd::String& bitmapFontName) override {
     RenameIfNeeded(bitmapFontName);
   };

Core/GDCore/IDE/Project/SceneResourcesFinder.h

@@ -74,6 +74,9 @@ private:
   void ExposeVideo(gd::String &videoResourceName) override {
     AddUsedResource(videoResourceName);
   };
+  void ExposeJavaScript(gd::String &javaScriptResourceName) override {
+    AddUsedResource(javaScriptResourceName);
+  };
   void ExposeBitmapFont(gd::String &bitmapFontName) override {
     AddUsedResource(bitmapFontName);
   };

Core/GDCore/IDE/ProjectBrowserHelper.cpp

@@ -26,8 +26,8 @@ namespace gd {
 
 void ProjectBrowserHelper::ExposeProjectEvents(
     gd::Project &project, gd::ArbitraryEventsWorker &worker) {
-  // See also gd::Project::ExposeResources for a method that traverses the whole
-  // project (this time for resources).
+  // See also gd::ResourceExposer::ExposeWholeProjectResources
+  // for a method that traverses the whole project (this time for resources).
 
   ExposeProjectEventsWithoutExtensions(project, worker);
 
@@ -106,16 +106,16 @@ void ProjectBrowserHelper::ExposeLayoutEventsAndDependencies(
   }
   for (const gd::String& sceneName : dependenciesAnalyzer.GetScenesDependencies()) {
     gd::Layout& dependencyLayout = project.GetLayout(sceneName);
-    
+
     worker.Launch(dependencyLayout.GetEvents());
   }
 }
 
 void ProjectBrowserHelper::ExposeProjectEvents(
     gd::Project &project, gd::ArbitraryEventsWorkerWithContext &worker) {
-  // See also gd::Project::ExposeResources for a method that traverse the whole
-  // project (this time for resources) and ExposeProjectEffects (this time for
-  // effects).
+  // See also gd::ResourceExposer::ExposeWholeProjectResources
+  // for a method that traverses the whole project (this time for resources)
+  // and ExposeProjectEffects (this time for effects).
 
   // Add layouts events
   for (std::size_t s = 0; s < project.GetLayoutsCount(); s++) {
@@ -147,7 +147,8 @@ void ProjectBrowserHelper::ExposeEventsFunctionsExtensionEvents(
     gd::Project &project, const gd::EventsFunctionsExtension &eventsFunctionsExtension,
     gd::ArbitraryEventsWorker &worker) {
     // Add (free) events functions
-    for (auto &&eventsFunction : eventsFunctionsExtension.GetInternalVector()) {
+    for (auto &&eventsFunction :
+         eventsFunctionsExtension.GetEventsFunctions().GetInternalVector()) {
       worker.Launch(eventsFunction->GetEvents());
     }
 
@@ -169,12 +170,18 @@ void ProjectBrowserHelper::ExposeEventsFunctionsExtensionEvents(
     gd::Project &project, const gd::EventsFunctionsExtension &eventsFunctionsExtension,
     gd::ArbitraryEventsWorkerWithContext &worker) {
     // Add (free) events functions
-    for (auto &&eventsFunction : eventsFunctionsExtension.GetInternalVector()) {
-      gd::ObjectsContainer parameterObjectsContainer;
+    for (auto &&eventsFunction :
+         eventsFunctionsExtension.GetEventsFunctions().GetInternalVector()) {
+      gd::ObjectsContainer parameterObjectsContainer(
+          gd::ObjectsContainer::SourceType::Function);
+    gd::VariablesContainer parameterVariablesContainer(
+        gd::VariablesContainer::SourceType::Parameters);
+    gd::VariablesContainer propertyVariablesContainer(
+        gd::VariablesContainer::SourceType::Properties);
       auto projectScopedContainers = gd::ProjectScopedContainers::
           MakeNewProjectScopedContainersForFreeEventsFunction(
               project, eventsFunctionsExtension, *eventsFunction,
-              parameterObjectsContainer);
+              parameterObjectsContainer, parameterVariablesContainer);
 
       worker.Launch(eventsFunction->GetEvents(), projectScopedContainers);
     }
@@ -206,14 +213,32 @@ void ProjectBrowserHelper::ExposeEventsBasedBehaviorEvents(
     gd::Project &project, const gd::EventsFunctionsExtension &eventsFunctionsExtension,
     const gd::EventsBasedBehavior &eventsBasedBehavior,
     gd::ArbitraryEventsWorkerWithContext &worker) {
+  gd::VariablesContainer propertyVariablesContainer(
+      gd::VariablesContainer::SourceType::Properties);
+  gd::ProjectBrowserHelper::ExposeEventsBasedBehaviorEvents(
+    project, eventsFunctionsExtension,
+    eventsBasedBehavior,
+    propertyVariablesContainer,
+    worker);
+}
+
+void ProjectBrowserHelper::ExposeEventsBasedBehaviorEvents(
+    gd::Project &project, const gd::EventsFunctionsExtension &eventsFunctionsExtension,
+    const gd::EventsBasedBehavior &eventsBasedBehavior,
+    gd::VariablesContainer &propertyVariablesContainer,
+    gd::ArbitraryEventsWorkerWithContext &worker) {
   auto &behaviorEventsFunctions = eventsBasedBehavior.GetEventsFunctions();
   for (auto &&eventsFunction : behaviorEventsFunctions.GetInternalVector()) {
 
-    gd::ObjectsContainer parameterObjectsContainers;
+    gd::ObjectsContainer parameterObjectsContainers(
+        gd::ObjectsContainer::SourceType::Function);
+    gd::VariablesContainer parameterVariablesContainer(
+        gd::VariablesContainer::SourceType::Parameters);
     auto projectScopedContainers = gd::ProjectScopedContainers::
         MakeNewProjectScopedContainersForBehaviorEventsFunction(
             project, eventsFunctionsExtension, eventsBasedBehavior,
-            *eventsFunction, parameterObjectsContainers);
+            *eventsFunction, parameterObjectsContainers,
+            parameterVariablesContainer, propertyVariablesContainer);
 
     worker.Launch(eventsFunction->GetEvents(), projectScopedContainers);
   }
@@ -233,14 +258,31 @@ void ProjectBrowserHelper::ExposeEventsBasedObjectEvents(
     const gd::EventsFunctionsExtension &eventsFunctionsExtension,
     const gd::EventsBasedObject &eventsBasedObject,
     gd::ArbitraryEventsWorkerWithContext &worker) {
+  gd::VariablesContainer propertyVariablesContainer(
+      gd::VariablesContainer::SourceType::Properties);
+  gd::ProjectBrowserHelper::ExposeEventsBasedObjectEvents(
+      project, eventsFunctionsExtension, eventsBasedObject,
+      propertyVariablesContainer, worker);
+}
+
+void ProjectBrowserHelper::ExposeEventsBasedObjectEvents(
+    gd::Project &project,
+    const gd::EventsFunctionsExtension &eventsFunctionsExtension,
+    const gd::EventsBasedObject &eventsBasedObject,
+    gd::VariablesContainer &propertyVariablesContainer,
+    gd::ArbitraryEventsWorkerWithContext &worker) {
   auto &objectEventsFunctions = eventsBasedObject.GetEventsFunctions();
   for (auto &&eventsFunction : objectEventsFunctions.GetInternalVector()) {
 
-    gd::ObjectsContainer parameterObjectsContainers;
+    gd::ObjectsContainer parameterObjectsContainers(
+        gd::ObjectsContainer::SourceType::Function);
+    gd::VariablesContainer parameterVariablesContainer(
+        gd::VariablesContainer::SourceType::Parameters);
     auto projectScopedContainers = gd::ProjectScopedContainers::
         MakeNewProjectScopedContainersForObjectEventsFunction(
             project, eventsFunctionsExtension, eventsBasedObject,
-            *eventsFunction, parameterObjectsContainers);
+            *eventsFunction, parameterObjectsContainers,
+            parameterVariablesContainer, propertyVariablesContainer);
 
     worker.Launch(eventsFunction->GetEvents(), projectScopedContainers);
   }
@@ -284,7 +326,7 @@ void ProjectBrowserHelper::ExposeProjectFunctions(
   for (std::size_t e = 0; e < project.GetEventsFunctionsExtensionsCount();
        e++) {
     auto &eventsFunctionsExtension = project.GetEventsFunctionsExtension(e);
-    worker.Launch(eventsFunctionsExtension);
+    worker.Launch(eventsFunctionsExtension.GetEventsFunctions());
 
     for (auto &&eventsBasedBehavior :
          eventsFunctionsExtension.GetEventsBasedBehaviors()

Core/GDCore/IDE/ProjectBrowserHelper.h

@@ -19,6 +19,7 @@ class ArbitraryEventsFunctionsWorker;
 class ArbitraryObjectsWorker;
 class ArbitraryEventBasedBehaviorsWorker;
 class ArbitraryBehaviorSharedDataWorker;
+class VariablesContainer;
 } // namespace gd
 
 namespace gd {
@@ -127,6 +128,20 @@ public:
       const gd::EventsBasedBehavior &eventsBasedBehavior,
       gd::ArbitraryEventsWorkerWithContext &worker);
 
+  /**
+   * \brief Call the specified worker on all events of the event-based
+   * behavior.
+   *
+   * This should be the preferred way to traverse all the events of an
+   * event-based behavior.
+   */
+  static void ExposeEventsBasedBehaviorEvents(
+      gd::Project &project,
+      const gd::EventsFunctionsExtension &eventsFunctionsExtension,
+      const gd::EventsBasedBehavior &eventsBasedBehavior,
+      gd::VariablesContainer &propertyVariablesContainer,
+      gd::ArbitraryEventsWorkerWithContext &worker);
+
   /**
    * \brief Call the specified worker on all events of the event-based
    * object.
@@ -152,6 +167,20 @@ public:
       const gd::EventsBasedObject &eventsBasedObject,
       gd::ArbitraryEventsWorkerWithContext &worker);
 
+  /**
+   * \brief Call the specified worker on all events of the event-based
+   * object.
+   *
+   * This should be the preferred way to traverse all the events of an
+   * event-based object.
+   */
+  static void ExposeEventsBasedObjectEvents(
+      gd::Project &project,
+      const gd::EventsFunctionsExtension &eventsFunctionsExtension,
+      const gd::EventsBasedObject &eventsBasedObject,
+      gd::VariablesContainer &propertyVariablesContainer,
+      gd::ArbitraryEventsWorkerWithContext &worker);
+
   /**
    * \brief Call the specified worker on all ObjectContainers of the project
    * (global, layouts...)

Core/GDCore/IDE/ProjectStripper.cpp

@@ -63,7 +63,7 @@ void GD_CORE_API ProjectStripper::StripProjectForExport(gd::Project &project) {
       eventsBasedObject.GetPropertyDescriptors().GetInternalVector().clear();
     }
     extension.GetEventsBasedBehaviors().Clear();
-    extension.ClearEventsFunctions();
+    extension.GetEventsFunctions().ClearEventsFunctions();
   }
 }
 

Core/GDCore/IDE/PropertyFunctionGenerator.cpp

@@ -245,9 +245,11 @@ void PropertyFunctionGenerator::GenerateGetterAndSetter(
 bool PropertyFunctionGenerator::CanGenerateGetterAndSetter(
     const gd::AbstractEventsBasedEntity &eventsBasedEntity,
     const gd::NamedPropertyDescriptor &property) {
-  auto &type = property.GetType();
-  if (type != "Boolean" && type != "Number" && type != "String" &&
-      type != "Choice" && type != "Color") {
+  const auto &primitiveType = gd::ValueTypeMetadata::GetPrimitiveValueType(
+      gd::ValueTypeMetadata::ConvertPropertyTypeToValueType(
+          property.GetType()));
+  if (primitiveType != "boolean" && primitiveType != "number" &&
+      primitiveType != "string") {
     return false;
   }
 

Core/GDCore/IDE/ResourceExposer.cpp

@@ -5,30 +5,22 @@
  */
 #include "ResourceExposer.h"
 
+#include "GDCore/Extensions/Metadata/EffectMetadata.h"
+#include "GDCore/Extensions/Metadata/MetadataProvider.h"
+#include "GDCore/Extensions/Platform.h"
 #include "GDCore/IDE/Events/ArbitraryEventsWorker.h"
-#include "GDCore/IDE/EventsFunctionTools.h"
-#include "GDCore/IDE/Project/ArbitraryBehaviorSharedDataWorker.h"
-#include "GDCore/IDE/Project/ArbitraryEventBasedBehaviorsWorker.h"
-#include "GDCore/IDE/Project/ArbitraryEventsFunctionsWorker.h"
-#include "GDCore/IDE/Project/ArbitraryObjectsWorker.h"
 #include "GDCore/IDE/Project/ArbitraryResourceWorker.h"
 #include "GDCore/IDE/ProjectBrowserHelper.h"
-#include "GDCore/Project/EventsBasedBehavior.h"
-#include "GDCore/Project/EventsBasedObject.h"
+#include "GDCore/Project/Effect.h"
 #include "GDCore/Project/EventsFunctionsExtension.h"
-#include "GDCore/Project/ExternalEvents.h"
 #include "GDCore/Project/Layout.h"
 #include "GDCore/Project/Project.h"
-#include "GDCore/Project/Effect.h"
 #include "GDCore/String.h"
-#include "GDCore/Extensions/Platform.h"
-#include "GDCore/Extensions/Metadata/MetadataProvider.h"
-#include "GDCore/Extensions/Metadata/EffectMetadata.h"
-#include "GDCore/IDE/Events/UsedExtensionsFinder.h"
 
 namespace gd {
 
-void ResourceExposer::ExposeWholeProjectResources(gd::Project& project, gd::ArbitraryResourceWorker& worker) {
+void ResourceExposer::ExposeWholeProjectResources(
+    gd::Project &project, gd::ArbitraryResourceWorker &worker) {
   // See also gd::ProjectBrowserHelper::ExposeProjectEvents for a method that
   // traverse the whole project (this time for events) and ExposeProjectEffects
   // (this time for effects).
@@ -40,13 +32,11 @@ void ResourceExposer::ExposeWholeProjectResources(gd::Project& project, gd::Arbi
 
   // Expose event resources
   auto eventWorker = gd::GetResourceWorkerOnEvents(project, worker);
-  gd::ProjectBrowserHelper::ExposeProjectEvents(
-    project, eventWorker);
+  gd::ProjectBrowserHelper::ExposeProjectEvents(project, eventWorker);
 
   // Expose object configuration resources
   auto objectWorker = gd::GetResourceWorkerOnObjects(project, worker);
-  gd::ProjectBrowserHelper::ExposeProjectObjects(
-    project, objectWorker);
+  gd::ProjectBrowserHelper::ExposeProjectObjects(project, objectWorker);
 
   // Expose layer effect resources
   for (std::size_t layoutIndex = 0; layoutIndex < project.GetLayoutsCount();
@@ -61,28 +51,36 @@ void ResourceExposer::ExposeWholeProjectResources(gd::Project& project, gd::Arbi
       for (size_t effectIndex = 0; effectIndex < effects.GetEffectsCount();
            effectIndex++) {
         auto &effect = effects.GetEffect(effectIndex);
-        gd::ResourceExposer::ExposeEffectResources(project.GetCurrentPlatform(),
-                                                   effect, worker);
+        gd::ResourceExposer::ExposeEffectResources(
+            project.GetCurrentPlatform(), effect, worker);
       }
     }
   }
 
   // Expose loading screen background image if present
-  auto& loadingScreen = project.GetLoadingScreen();
+  auto &loadingScreen = project.GetLoadingScreen();
   if (loadingScreen.GetBackgroundImageResourceName() != "")
     worker.ExposeImage(loadingScreen.GetBackgroundImageResourceName());
+
+  // Expose extension source files
+  for (std::size_t e = 0; e < project.GetEventsFunctionsExtensionsCount();
+       e++) {
+    auto &eventsFunctionsExtension = project.GetEventsFunctionsExtension(e);
+    ExposeExtensionResources(eventsFunctionsExtension, worker);
+  }
 }
 
-void ResourceExposer::ExposeProjectResources(gd::Project& project, gd::ArbitraryResourceWorker& worker) {
+void ResourceExposer::ExposeProjectResources(
+    gd::Project &project, gd::ArbitraryResourceWorker &worker) {
   // Expose global objects configuration resources
   auto objectWorker = gd::GetResourceWorkerOnObjects(project, worker);
   objectWorker.Launch(project.GetObjects());
 }
 
 void ResourceExposer::ExposeLayoutResources(
-    gd::Project &project, gd::Layout &layout,
+    gd::Project &project,
+    gd::Layout &layout,
     gd::ArbitraryResourceWorker &worker) {
-
   // Expose object configuration resources
   auto objectWorker = gd::GetResourceWorkerOnObjects(project, worker);
   gd::ProjectBrowserHelper::ExposeLayoutObjects(layout, objectWorker);
@@ -96,15 +94,15 @@ void ResourceExposer::ExposeLayoutResources(
     for (size_t effectIndex = 0; effectIndex < effects.GetEffectsCount();
          effectIndex++) {
       auto &effect = effects.GetEffect(effectIndex);
-      gd::ResourceExposer::ExposeEffectResources(project.GetCurrentPlatform(),
-                                                 effect, worker);
+      gd::ResourceExposer::ExposeEffectResources(
+          project.GetCurrentPlatform(), effect, worker);
     }
   }
 
   // Expose event resources
   auto eventWorker = gd::GetResourceWorkerOnEvents(project, worker);
-  gd::ProjectBrowserHelper::ExposeLayoutEventsAndDependencies(project, layout,
-                                                              eventWorker);
+  gd::ProjectBrowserHelper::ExposeLayoutEventsAndDependencies(
+      project, layout, eventWorker);
 
   // Exposed extension event resources
   // Note that using resources in extensions is very unlikely and probably not
@@ -112,12 +110,14 @@ void ResourceExposer::ExposeLayoutResources(
   for (std::size_t e = 0; e < project.GetEventsFunctionsExtensionsCount();
        e++) {
     auto &eventsFunctionsExtension = project.GetEventsFunctionsExtension(e);
-    gd::ProjectBrowserHelper::ExposeEventsFunctionsExtensionEvents(project, eventsFunctionsExtension, eventWorker);
+    gd::ProjectBrowserHelper::ExposeEventsFunctionsExtensionEvents(
+        project, eventsFunctionsExtension, eventWorker);
   }
 }
 
 void ResourceExposer::ExposeEffectResources(
-    gd::Platform &platform, gd::Effect &effect,
+    gd::Platform &platform,
+    gd::Effect &effect,
     gd::ArbitraryResourceWorker &worker) {
   auto &effectMetadata =
       MetadataProvider::GetEffectMetadata(platform, effect.GetEffectType());
@@ -136,11 +136,20 @@ void ResourceExposer::ExposeEffectResources(
         worker.ExposeResourceWithType(resourceType,
                                       potentiallyUpdatedResourceName);
         if (potentiallyUpdatedResourceName != resourceName) {
-          effect.SetStringParameter(propertyName, potentiallyUpdatedResourceName);
+          effect.SetStringParameter(propertyName,
+                                    potentiallyUpdatedResourceName);
         }
       }
     }
   }
 }
 
-} // namespace gd
+void ResourceExposer::ExposeExtensionResources(
+    gd::EventsFunctionsExtension &extension,
+    gd::ArbitraryResourceWorker &worker) {
+  for (auto &sourceFile : extension.GetAllSourceFiles()) {
+    worker.ExposeJavaScript(sourceFile.GetResourceName());
+  }
+}
+
+}  // namespace gd

Core/GDCore/IDE/ResourceExposer.h

@@ -9,9 +9,10 @@ namespace gd {
 class Platform;
 class Project;
 class ArbitraryResourceWorker;
+class EventsFunctionsExtension;
 class Effect;
 class Layout;
-} // namespace gd
+}  // namespace gd
 
 namespace gd {
 
@@ -19,7 +20,7 @@ namespace gd {
  * \brief
  */
 class GD_CORE_API ResourceExposer {
-public:
+ public:
   /**
    * \brief Called ( e.g. during compilation ) so as to inventory internal
    * resources, sometimes update their filename or any other work or resources.
@@ -34,7 +35,7 @@ public:
 
   /**
    * @brief Expose only the resources used globally on a project.
-   * 
+   *
    * It doesn't include resources used in layouts.
    */
   static void ExposeProjectResources(gd::Project &project,
@@ -42,17 +43,25 @@ public:
 
   /**
    * @brief Expose the resources used in a given layout.
-   * 
+   *
    * It doesn't include resources used globally.
    */
-  static void ExposeLayoutResources(gd::Project &project, gd::Layout &layout,
-                                          gd::ArbitraryResourceWorker &worker);
+  static void ExposeLayoutResources(gd::Project &project,
+                                    gd::Layout &layout,
+                                    gd::ArbitraryResourceWorker &worker);
 
   /**
    * @brief Expose the resources used in a given effect.
    */
-  static void ExposeEffectResources(gd::Platform &platform, gd::Effect &effect,
+  static void ExposeEffectResources(gd::Platform &platform,
+                                    gd::Effect &effect,
                                     gd::ArbitraryResourceWorker &worker);
+
+  /**
+   * @brief Expose the resources used in an extension.
+   */
+  static void ExposeExtensionResources(gd::EventsFunctionsExtension &extension,
+                                       gd::ArbitraryResourceWorker &worker);
 };
 
-} // namespace gd
+}  // namespace gd

Core/GDCore/IDE/WholeProjectRefactorer.cpp

@@ -13,11 +13,13 @@
 #include "GDCore/IDE/DependenciesAnalyzer.h"
 #include "GDCore/IDE/GroupVariableHelper.h"
 #include "GDCore/IDE/EventBasedBehaviorBrowser.h"
+#include "GDCore/IDE/EventBasedObjectBrowser.h"
 #include "GDCore/IDE/Events/ArbitraryEventsWorker.h"
 #include "GDCore/IDE/Events/BehaviorParametersFiller.h"
 #include "GDCore/IDE/Events/BehaviorTypeRenamer.h"
 #include "GDCore/IDE/Events/CustomObjectTypeRenamer.h"
 #include "GDCore/IDE/Events/EventsBehaviorRenamer.h"
+#include "GDCore/IDE/Events/EventsParameterReplacer.h"
 #include "GDCore/IDE/Events/EventsPropertyReplacer.h"
 #include "GDCore/IDE/Events/EventsRefactorer.h"
 #include "GDCore/IDE/Events/EventsVariableInstructionTypeSwitcher.h"
@@ -27,12 +29,8 @@
 #include "GDCore/IDE/Events/InstructionsParameterMover.h"
 #include "GDCore/IDE/Events/InstructionsTypeRenamer.h"
 #include "GDCore/IDE/Events/LinkEventTargetRenamer.h"
+#include "GDCore/IDE/Events/LeaderboardIdRenamer.h"
 #include "GDCore/IDE/Events/ProjectElementRenamer.h"
-#include "GDCore/IDE/EventsFunctionTools.h"
-#include "GDCore/IDE/Project/ArbitraryBehaviorSharedDataWorker.h"
-#include "GDCore/IDE/Project/ArbitraryEventBasedBehaviorsWorker.h"
-#include "GDCore/IDE/Project/ArbitraryEventsFunctionsWorker.h"
-#include "GDCore/IDE/Project/ArbitraryObjectsWorker.h"
 #include "GDCore/IDE/Project/BehaviorObjectTypeRenamer.h"
 #include "GDCore/IDE/Project/BehaviorsSharedDataBehaviorTypeRenamer.h"
 #include "GDCore/IDE/Project/FunctionParameterBehaviorTypeRenamer.h"
@@ -415,20 +413,32 @@ void WholeProjectRefactorer::UpdateExtensionNameInEventsBasedBehavior(
     const gd::EventsFunctionsExtension &eventsFunctionsExtension,
     gd::EventsBasedBehavior &eventsBasedBehavior,
     const gd::String &sourceExtensionName) {
-  const EventBasedBehaviorBrowser eventBasedBehaviorExposer(
+  const EventBasedBehaviorBrowser eventBasedBehaviorBrowser(
       eventsFunctionsExtension, eventsBasedBehavior);
   WholeProjectRefactorer::RenameEventsFunctionsExtension(
       project, eventsFunctionsExtension, sourceExtensionName,
-      eventsFunctionsExtension.GetName(), eventBasedBehaviorExposer);
+      eventsFunctionsExtension.GetName(), eventBasedBehaviorBrowser);
+}
+
+void WholeProjectRefactorer::UpdateExtensionNameInEventsBasedObject(
+    gd::Project &project,
+    const gd::EventsFunctionsExtension &eventsFunctionsExtension,
+    gd::EventsBasedObject &eventsBasedObject,
+    const gd::String &sourceExtensionName) {
+  const EventBasedObjectBrowser eventBasedObjectBrowser(
+      eventsFunctionsExtension, eventsBasedObject);
+  WholeProjectRefactorer::RenameEventsFunctionsExtension(
+      project, eventsFunctionsExtension, sourceExtensionName,
+      eventsFunctionsExtension.GetName(), eventBasedObjectBrowser);
 }
 
 void WholeProjectRefactorer::RenameEventsFunctionsExtension(
     gd::Project &project,
     const gd::EventsFunctionsExtension &eventsFunctionsExtension,
     const gd::String &oldName, const gd::String &newName) {
-  const WholeProjectBrowser wholeProjectExposer;
+  const WholeProjectBrowser wholeProjectBrowser;
   RenameEventsFunctionsExtension(project, eventsFunctionsExtension, oldName,
-                                 newName, wholeProjectExposer);
+                                 newName, wholeProjectBrowser);
 }
 
 void WholeProjectRefactorer::RenameEventsFunctionsExtension(
@@ -590,7 +600,8 @@ void WholeProjectRefactorer::RenameEventsFunctionsExtension(
   // instructions after they are renamed.
 
   // Free expressions
-  for (auto &&eventsFunction : eventsFunctionsExtension.GetInternalVector()) {
+  for (auto &&eventsFunction :
+       eventsFunctionsExtension.GetEventsFunctions().GetInternalVector()) {
     if (eventsFunction->IsExpression()) {
       renameEventsFunction(*eventsFunction);
     }
@@ -607,7 +618,8 @@ void WholeProjectRefactorer::RenameEventsFunctionsExtension(
   }
 
   // Free instructions
-  for (auto &&eventsFunction : eventsFunctionsExtension.GetInternalVector()) {
+  for (auto &&eventsFunction :
+       eventsFunctionsExtension.GetEventsFunctions().GetInternalVector()) {
     if (eventsFunction->IsAction() || eventsFunction->IsCondition()) {
       renameEventsFunction(*eventsFunction);
     }
@@ -687,11 +699,12 @@ void WholeProjectRefactorer::RenameEventsFunction(
     gd::Project &project,
     const gd::EventsFunctionsExtension &eventsFunctionsExtension,
     const gd::String &oldFunctionName, const gd::String &newFunctionName) {
-  if (!eventsFunctionsExtension.HasEventsFunctionNamed(oldFunctionName))
+  const auto &eventsFunctions = eventsFunctionsExtension.GetEventsFunctions();
+  if (!eventsFunctions.HasEventsFunctionNamed(oldFunctionName))
     return;
 
   const gd::EventsFunction &eventsFunction =
-      eventsFunctionsExtension.GetEventsFunction(oldFunctionName);
+      eventsFunctions.GetEventsFunction(oldFunctionName);
 
   const WholeProjectBrowser wholeProjectExposer;
   DoRenameEventsFunction(
@@ -704,7 +717,7 @@ void WholeProjectRefactorer::RenameEventsFunction(
 
   if (eventsFunction.GetFunctionType() ==
       gd::EventsFunction::ExpressionAndCondition) {
-    for (auto &&otherFunction : eventsFunctionsExtension.GetInternalVector()) {
+    for (auto &&otherFunction : eventsFunctions.GetInternalVector()) {
       if (otherFunction->GetFunctionType() ==
               gd::EventsFunction::ActionWithOperator &&
           otherFunction->GetGetterName() == oldFunctionName) {
@@ -807,16 +820,79 @@ void WholeProjectRefactorer::RenameObjectEventsFunction(
   }
 }
 
+void WholeProjectRefactorer::RenameParameter(
+    gd::Project &project, gd::ProjectScopedContainers &projectScopedContainers,
+    gd::EventsFunction &eventsFunction,
+    const gd::ObjectsContainer &parameterObjectsContainer,
+    const gd::String &oldParameterName, const gd::String &newParameterName) {
+  auto &parameters = eventsFunction.GetParameters();
+  if (!parameters.HasParameterNamed(oldParameterName))
+    return;
+  auto &parameter = parameters.GetParameter(oldParameterName);
+  if (parameter.GetValueTypeMetadata().IsObject()) {
+    gd::WholeProjectRefactorer::ObjectOrGroupRenamedInEventsFunction(
+        project, projectScopedContainers, eventsFunction,
+        parameterObjectsContainer, oldParameterName, newParameterName, false);
+  } else if (parameter.GetValueTypeMetadata().IsBehavior()) {
+    size_t behaviorParameterIndex = parameters.GetParameterPosition(parameter);
+    size_t objectParameterIndex =
+        gd::ParameterMetadataTools::GetObjectParameterIndexFor(
+            parameters, behaviorParameterIndex);
+    if (objectParameterIndex == gd::String::npos) {
+      return;
+    }
+    const gd::String &objectName =
+        parameters.GetParameter(objectParameterIndex).GetName();
+    gd::EventsBehaviorRenamer behaviorRenamer(project.GetCurrentPlatform(),
+                                              objectName, oldParameterName,
+                                              newParameterName);
+    behaviorRenamer.Launch(eventsFunction.GetEvents(), projectScopedContainers);
+  } else {
+    // Rename parameter names directly used as an identifier.
+    std::unordered_map<gd::String, gd::String> oldToNewParameterNames = {
+        {oldParameterName, newParameterName}};
+    gd::EventsParameterReplacer eventsParameterReplacer(
+        project.GetCurrentPlatform(), oldToNewParameterNames);
+    eventsParameterReplacer.Launch(eventsFunction.GetEvents(),
+                                   projectScopedContainers);
+
+    // Rename parameter names in legacy expressions and instructions
+    gd::ProjectElementRenamer projectElementRenamer(
+        project.GetCurrentPlatform(), "functionParameterName", oldParameterName,
+        newParameterName);
+    projectElementRenamer.Launch(eventsFunction.GetEvents(),
+                                 projectScopedContainers);
+  }
+}
+
+void WholeProjectRefactorer::ChangeParameterType(
+    gd::Project &project, gd::ProjectScopedContainers &projectScopedContainers,
+    gd::EventsFunction &eventsFunction,
+    const gd::ObjectsContainer &parameterObjectsContainer,
+    const gd::String &parameterName) {
+  std::unordered_set<gd::String> typeChangedPropertyNames;
+  typeChangedPropertyNames.insert(parameterName);
+  gd::VariablesContainer propertyVariablesContainer(
+      gd::VariablesContainer::SourceType::Properties);
+  gd::EventsVariableInstructionTypeSwitcher
+      eventsVariableInstructionTypeSwitcher(project.GetCurrentPlatform(),
+                                            typeChangedPropertyNames,
+                                            propertyVariablesContainer);
+  eventsVariableInstructionTypeSwitcher.Launch(eventsFunction.GetEvents(),
+                                               projectScopedContainers);
+}
+
 void WholeProjectRefactorer::MoveEventsFunctionParameter(
     gd::Project &project,
     const gd::EventsFunctionsExtension &eventsFunctionsExtension,
     const gd::String &functionName, std::size_t oldIndex,
     std::size_t newIndex) {
-  if (!eventsFunctionsExtension.HasEventsFunctionNamed(functionName))
+  const auto &eventsFunctions = eventsFunctionsExtension.GetEventsFunctions();
+  if (!eventsFunctions.HasEventsFunctionNamed(functionName))
     return;
 
   const gd::EventsFunction &eventsFunction =
-      eventsFunctionsExtension.GetEventsFunction(functionName);
+      eventsFunctions.GetEventsFunction(functionName);
 
   const gd::String &eventsFunctionType =
       gd::PlatformExtension::GetEventsFunctionFullType(
@@ -941,6 +1017,8 @@ void WholeProjectRefactorer::RenameEventsBasedBehaviorProperty(
     // Order is important: we first rename the expressions then the
     // instructions, to avoid being unable to fetch the metadata (the types of
     // parameters) of instructions after they are renamed.
+
+    // Rename legacy expressions like: Object.Behavior::PropertyMyPropertyName()
     gd::ExpressionsRenamer expressionRenamer =
         gd::ExpressionsRenamer(project.GetCurrentPlatform());
     expressionRenamer.SetReplacedBehaviorExpression(
@@ -950,14 +1028,16 @@ void WholeProjectRefactorer::RenameEventsBasedBehaviorProperty(
         EventsBasedBehavior::GetPropertyExpressionName(newPropertyName));
     gd::ProjectBrowserHelper::ExposeProjectEvents(project, expressionRenamer);
 
+    // Rename property names directly used as an identifier.
     std::unordered_map<gd::String, gd::String> oldToNewPropertyNames = {
         {oldPropertyName, newPropertyName}};
     std::unordered_set<gd::String> removedPropertyNames;
     gd::EventsPropertyReplacer eventsPropertyReplacer(
         project.GetCurrentPlatform(), properties, oldToNewPropertyNames,
         removedPropertyNames);
-    gd::ProjectBrowserHelper::ExposeProjectEvents(project,
-                                                  eventsPropertyReplacer);
+    gd::ProjectBrowserHelper::ExposeEventsBasedBehaviorEvents(
+        project, eventsFunctionsExtension, eventsBasedBehavior,
+        eventsPropertyReplacer);
 
     gd::InstructionsTypeRenamer actionRenamer = gd::InstructionsTypeRenamer(
         project,
@@ -1012,6 +1092,8 @@ void WholeProjectRefactorer::RenameEventsBasedBehaviorSharedProperty(
     // Order is important: we first rename the expressions then the
     // instructions, to avoid being unable to fetch the metadata (the types of
     // parameters) of instructions after they are renamed.
+
+    // Rename legacy expressions like: Object.Behavior::SharedPropertyMyPropertyName()
     gd::ExpressionsRenamer expressionRenamer =
         gd::ExpressionsRenamer(project.GetCurrentPlatform());
     expressionRenamer.SetReplacedBehaviorExpression(
@@ -1021,14 +1103,16 @@ void WholeProjectRefactorer::RenameEventsBasedBehaviorSharedProperty(
         EventsBasedBehavior::GetSharedPropertyExpressionName(newPropertyName));
     gd::ProjectBrowserHelper::ExposeProjectEvents(project, expressionRenamer);
 
+    // Rename property names directly used as an identifier.
     std::unordered_map<gd::String, gd::String> oldToNewPropertyNames = {
         {oldPropertyName, newPropertyName}};
     std::unordered_set<gd::String> removedPropertyNames;
     gd::EventsPropertyReplacer eventsPropertyReplacer(
         project.GetCurrentPlatform(), properties, oldToNewPropertyNames,
         removedPropertyNames);
-    gd::ProjectBrowserHelper::ExposeProjectEvents(project,
-                                                  eventsPropertyReplacer);
+    gd::ProjectBrowserHelper::ExposeEventsBasedBehaviorEvents(
+        project, eventsFunctionsExtension, eventsBasedBehavior,
+        eventsPropertyReplacer);
 
     gd::InstructionsTypeRenamer actionRenamer = gd::InstructionsTypeRenamer(
         project,
@@ -1069,6 +1153,8 @@ void WholeProjectRefactorer::RenameEventsBasedObjectProperty(
   // Order is important: we first rename the expressions then the
   // instructions, to avoid being unable to fetch the metadata (the types of
   // parameters) of instructions after they are renamed.
+
+  // Rename legacy expressions like: Object.PropertyMyPropertyName()
   gd::ExpressionsRenamer expressionRenamer =
       gd::ExpressionsRenamer(project.GetCurrentPlatform());
   expressionRenamer.SetReplacedObjectExpression(
@@ -1078,14 +1164,16 @@ void WholeProjectRefactorer::RenameEventsBasedObjectProperty(
       EventsBasedObject::GetPropertyExpressionName(newPropertyName));
   gd::ProjectBrowserHelper::ExposeProjectEvents(project, expressionRenamer);
 
+  // Rename property names directly used as an identifier.
   std::unordered_map<gd::String, gd::String> oldToNewPropertyNames = {
       {oldPropertyName, newPropertyName}};
   std::unordered_set<gd::String> removedPropertyNames;
   gd::EventsPropertyReplacer eventsPropertyReplacer(
       project.GetCurrentPlatform(), properties, oldToNewPropertyNames,
       removedPropertyNames);
-  gd::ProjectBrowserHelper::ExposeProjectEvents(project,
-                                                eventsPropertyReplacer);
+  gd::ProjectBrowserHelper::ExposeEventsBasedObjectEvents(
+      project, eventsFunctionsExtension, eventsBasedObject,
+      eventsPropertyReplacer);
 
   gd::InstructionsTypeRenamer actionRenamer = gd::InstructionsTypeRenamer(
       project,
@@ -1108,6 +1196,42 @@ void WholeProjectRefactorer::RenameEventsBasedObjectProperty(
   gd::ProjectBrowserHelper::ExposeProjectEvents(project, conditionRenamer);
 }
 
+void WholeProjectRefactorer::ChangeEventsBasedBehaviorPropertyType(
+    gd::Project &project,
+    const gd::EventsFunctionsExtension &eventsFunctionsExtension,
+    const gd::EventsBasedBehavior &eventsBasedBehavior,
+    const gd::String &propertyName) {
+  std::unordered_set<gd::String> typeChangedPropertyNames;
+  typeChangedPropertyNames.insert(propertyName);
+  gd::VariablesContainer propertyVariablesContainer(
+      gd::VariablesContainer::SourceType::Properties);
+  gd::EventsVariableInstructionTypeSwitcher
+      eventsVariableInstructionTypeSwitcher(project.GetCurrentPlatform(),
+                                            typeChangedPropertyNames,
+                                            propertyVariablesContainer);
+  gd::ProjectBrowserHelper::ExposeEventsBasedBehaviorEvents(
+      project, eventsFunctionsExtension, eventsBasedBehavior,
+      propertyVariablesContainer, eventsVariableInstructionTypeSwitcher);
+}
+
+void WholeProjectRefactorer::ChangeEventsBasedObjectPropertyType(
+    gd::Project &project,
+    const gd::EventsFunctionsExtension &eventsFunctionsExtension,
+    const gd::EventsBasedObject &eventsBasedObject,
+    const gd::String &propertyName) {
+  std::unordered_set<gd::String> typeChangedPropertyNames;
+  typeChangedPropertyNames.insert(propertyName);
+  gd::VariablesContainer propertyVariablesContainer(
+      gd::VariablesContainer::SourceType::Properties);
+  gd::EventsVariableInstructionTypeSwitcher
+      eventsVariableInstructionTypeSwitcher(project.GetCurrentPlatform(),
+                                            typeChangedPropertyNames,
+                                            propertyVariablesContainer);
+  gd::ProjectBrowserHelper::ExposeEventsBasedObjectEvents(
+      project, eventsFunctionsExtension, eventsBasedObject,
+      propertyVariablesContainer, eventsVariableInstructionTypeSwitcher);
+}
+
 void WholeProjectRefactorer::AddBehaviorAndRequiredBehaviors(
     gd::Project &project, gd::Object &object, const gd::String &behaviorType,
     const gd::String &behaviorName) {
@@ -1312,6 +1436,19 @@ bool WholeProjectRefactorer::FixInvalidRequiredBehaviorProperties(
   return !invalidRequiredBehaviorProblems.empty();
 }
 
+void WholeProjectRefactorer::UpdateBehaviorNameInEventsBasedBehavior(
+    gd::Project &project,
+    const gd::EventsFunctionsExtension &eventsFunctionsExtension,
+    gd::EventsBasedBehavior &eventsBasedBehavior,
+    const gd::String &sourceBehaviorName) {
+  const EventBasedBehaviorBrowser eventBasedBehaviorExposer(
+      eventsFunctionsExtension, eventsBasedBehavior);
+  WholeProjectRefactorer::RenameEventsBasedBehavior(
+      project, eventsFunctionsExtension, eventsBasedBehavior,
+      sourceBehaviorName, eventsBasedBehavior.GetName(),
+      eventBasedBehaviorExposer);
+}
+
 void WholeProjectRefactorer::RenameEventsBasedBehavior(
     gd::Project &project,
     const gd::EventsFunctionsExtension &eventsFunctionsExtension,
@@ -1324,10 +1461,22 @@ void WholeProjectRefactorer::RenameEventsBasedBehavior(
     return;
   }
   auto &eventsBasedBehavior = eventsBasedBehaviors.Get(oldBehaviorName);
+  const WholeProjectBrowser projectBrowser;
+  WholeProjectRefactorer::RenameEventsBasedBehavior(
+      project, eventsFunctionsExtension, eventsBasedBehavior, oldBehaviorName,
+      newBehaviorName, projectBrowser);
+}
 
+void WholeProjectRefactorer::RenameEventsBasedBehavior(
+    gd::Project &project,
+    const gd::EventsFunctionsExtension &eventsFunctionsExtension,
+    const gd::EventsBasedBehavior &eventsBasedBehavior,
+    const gd::String &oldBehaviorName,
+    const gd::String &newBehaviorName,
+    const gd::ProjectBrowser &projectBrowser) {
   auto renameBehaviorEventsFunction =
       [&project, &eventsFunctionsExtension, &oldBehaviorName,
-       &newBehaviorName](const gd::EventsFunction &eventsFunction) {
+       &newBehaviorName, &projectBrowser](const gd::EventsFunction &eventsFunction) {
         if (eventsFunction.IsExpression()) {
           // Nothing to do, expressions are not including the name of the
           // behavior
@@ -1341,12 +1490,12 @@ void WholeProjectRefactorer::RenameEventsBasedBehavior(
               gd::PlatformExtension::GetBehaviorEventsFunctionFullType(
                   eventsFunctionsExtension.GetName(), newBehaviorName,
                   eventsFunction.GetName()));
-          gd::ProjectBrowserHelper::ExposeProjectEvents(project, renamer);
+          projectBrowser.ExposeEvents(project, renamer);
         }
       };
 
   auto renameBehaviorProperty = [&project, &eventsFunctionsExtension,
-                                 &oldBehaviorName, &newBehaviorName](
+                                 &oldBehaviorName, &newBehaviorName, &projectBrowser](
                                     const gd::NamedPropertyDescriptor
                                         &property) {
     gd::InstructionsTypeRenamer actionRenamer = gd::InstructionsTypeRenamer(
@@ -1357,7 +1506,7 @@ void WholeProjectRefactorer::RenameEventsBasedBehavior(
         gd::PlatformExtension::GetBehaviorEventsFunctionFullType(
             eventsFunctionsExtension.GetName(), newBehaviorName,
             EventsBasedBehavior::GetPropertyActionName(property.GetName())));
-    gd::ProjectBrowserHelper::ExposeProjectEvents(project, actionRenamer);
+    projectBrowser.ExposeEvents(project, actionRenamer);
 
     gd::InstructionsTypeRenamer conditionRenamer = gd::InstructionsTypeRenamer(
         project,
@@ -1367,7 +1516,7 @@ void WholeProjectRefactorer::RenameEventsBasedBehavior(
         gd::PlatformExtension::GetBehaviorEventsFunctionFullType(
             eventsFunctionsExtension.GetName(), newBehaviorName,
             EventsBasedBehavior::GetPropertyConditionName(property.GetName())));
-    gd::ProjectBrowserHelper::ExposeProjectEvents(project, conditionRenamer);
+    projectBrowser.ExposeEvents(project, conditionRenamer);
 
     // Nothing to do for expression, expressions are not including the name of
     // the behavior
@@ -1375,7 +1524,7 @@ void WholeProjectRefactorer::RenameEventsBasedBehavior(
 
   auto renameBehaviorSharedProperty =
       [&project, &eventsFunctionsExtension, &oldBehaviorName,
-       &newBehaviorName](const gd::NamedPropertyDescriptor &property) {
+       &newBehaviorName, &projectBrowser](const gd::NamedPropertyDescriptor &property) {
         gd::InstructionsTypeRenamer actionRenamer = gd::InstructionsTypeRenamer(
             project,
             gd::PlatformExtension::GetBehaviorEventsFunctionFullType(
@@ -1386,7 +1535,7 @@ void WholeProjectRefactorer::RenameEventsBasedBehavior(
                 eventsFunctionsExtension.GetName(), newBehaviorName,
                 EventsBasedBehavior::GetSharedPropertyActionName(
                     property.GetName())));
-        gd::ProjectBrowserHelper::ExposeProjectEvents(project, actionRenamer);
+        projectBrowser.ExposeEvents(project, actionRenamer);
 
         gd::InstructionsTypeRenamer conditionRenamer =
             gd::InstructionsTypeRenamer(
@@ -1399,8 +1548,7 @@ void WholeProjectRefactorer::RenameEventsBasedBehavior(
                     eventsFunctionsExtension.GetName(), newBehaviorName,
                     EventsBasedBehavior::GetSharedPropertyConditionName(
                         property.GetName())));
-        gd::ProjectBrowserHelper::ExposeProjectEvents(project,
-                                                      conditionRenamer);
+        projectBrowser.ExposeEvents(project, conditionRenamer);
 
         // Nothing to do for expression, expressions are not including the name
         // of the behavior
@@ -1435,13 +1583,25 @@ void WholeProjectRefactorer::RenameEventsBasedBehavior(
     renameBehaviorSharedProperty(*property);
   }
 
-  const WholeProjectBrowser wholeProjectExposer;
   DoRenameBehavior(project,
                    gd::PlatformExtension::GetBehaviorFullType(
                        eventsFunctionsExtension.GetName(), oldBehaviorName),
                    gd::PlatformExtension::GetBehaviorFullType(
                        eventsFunctionsExtension.GetName(), newBehaviorName),
-                   wholeProjectExposer);
+                   projectBrowser);
+}
+
+void WholeProjectRefactorer::UpdateObjectNameInEventsBasedObject(
+    gd::Project &project,
+    const gd::EventsFunctionsExtension &eventsFunctionsExtension,
+    gd::EventsBasedObject &eventsBasedObject,
+    const gd::String &sourceObjectName) {
+  const EventBasedObjectBrowser eventBasedObjectBrowser(
+      eventsFunctionsExtension, eventsBasedObject);
+  WholeProjectRefactorer::RenameEventsBasedObject(
+      project, eventsFunctionsExtension, eventsBasedObject,
+      sourceObjectName, eventsBasedObject.GetName(),
+      eventBasedObjectBrowser);
 }
 
 void WholeProjectRefactorer::RenameEventsBasedObject(
@@ -1455,10 +1615,21 @@ void WholeProjectRefactorer::RenameEventsBasedObject(
     return;
   }
   auto &eventsBasedObject = eventsBasedObjects.Get(oldObjectName);
+  const WholeProjectBrowser projectBrowser;
+  WholeProjectRefactorer::RenameEventsBasedObject(
+      project, eventsFunctionsExtension, eventsBasedObject, oldObjectName,
+      newObjectName, projectBrowser);
+}
 
+void WholeProjectRefactorer::RenameEventsBasedObject(
+    gd::Project &project,
+    const gd::EventsFunctionsExtension &eventsFunctionsExtension,
+    const gd::EventsBasedObject &eventsBasedObject,
+    const gd::String &oldObjectName, const gd::String &newObjectName,
+    const gd::ProjectBrowser &projectBrowser) {
   auto renameObjectEventsFunction =
-      [&project, &eventsFunctionsExtension, &oldObjectName,
-       &newObjectName](const gd::EventsFunction &eventsFunction) {
+      [&project, &eventsFunctionsExtension, &oldObjectName, &newObjectName,
+       &projectBrowser](const gd::EventsFunction &eventsFunction) {
         if (eventsFunction.IsExpression()) {
           // Nothing to do, expressions are not including the name of the
           // object
@@ -1472,12 +1643,12 @@ void WholeProjectRefactorer::RenameEventsBasedObject(
               gd::PlatformExtension::GetObjectEventsFunctionFullType(
                   eventsFunctionsExtension.GetName(), newObjectName,
                   eventsFunction.GetName()));
-          gd::ProjectBrowserHelper::ExposeProjectEvents(project, renamer);
+          projectBrowser.ExposeEvents(project, renamer);
         }
       };
 
   auto renameObjectProperty = [&project, &eventsFunctionsExtension,
-                               &oldObjectName, &newObjectName](
+                               &oldObjectName, &newObjectName, &projectBrowser](
                                   const gd::NamedPropertyDescriptor &property) {
     gd::InstructionsTypeRenamer actionRenamer = gd::InstructionsTypeRenamer(
         project,
@@ -1487,7 +1658,7 @@ void WholeProjectRefactorer::RenameEventsBasedObject(
         gd::PlatformExtension::GetObjectEventsFunctionFullType(
             eventsFunctionsExtension.GetName(), newObjectName,
             EventsBasedObject::GetPropertyActionName(property.GetName())));
-    gd::ProjectBrowserHelper::ExposeProjectEvents(project, actionRenamer);
+    projectBrowser.ExposeEvents(project, actionRenamer);
 
     gd::InstructionsTypeRenamer conditionRenamer = gd::InstructionsTypeRenamer(
         project,
@@ -1497,7 +1668,7 @@ void WholeProjectRefactorer::RenameEventsBasedObject(
         gd::PlatformExtension::GetObjectEventsFunctionFullType(
             eventsFunctionsExtension.GetName(), newObjectName,
             EventsBasedObject::GetPropertyConditionName(property.GetName())));
-    gd::ProjectBrowserHelper::ExposeProjectEvents(project, conditionRenamer);
+    projectBrowser.ExposeEvents(project, conditionRenamer);
 
     // Nothing to do for expression, expressions are not including the name of
     // the object
@@ -1528,13 +1699,12 @@ void WholeProjectRefactorer::RenameEventsBasedObject(
     renameObjectProperty(*property);
   }
 
-  const WholeProjectBrowser wholeProjectExposer;
   DoRenameObject(project,
                  gd::PlatformExtension::GetObjectFullType(
                      eventsFunctionsExtension.GetName(), oldObjectName),
                  gd::PlatformExtension::GetObjectFullType(
                      eventsFunctionsExtension.GetName(), newObjectName),
-                 wholeProjectExposer);
+                 projectBrowser);
 }
 
 void WholeProjectRefactorer::DoRenameEventsFunction(
@@ -1638,6 +1808,15 @@ void WholeProjectRefactorer::BehaviorsAddedToObjectInScene(
 void WholeProjectRefactorer::ObjectOrGroupRenamedInScene(
     gd::Project &project, gd::Layout &layout, const gd::String &oldName,
     const gd::String &newName, bool isObjectGroup) {
+  gd::WholeProjectRefactorer::ObjectOrGroupRenamedInScene(
+      project, layout, layout.GetObjects(), oldName, newName, isObjectGroup);
+}
+
+void WholeProjectRefactorer::ObjectOrGroupRenamedInScene(
+    gd::Project &project, gd::Layout &layout,
+    const gd::ObjectsContainer &targetedObjectsContainer,
+    const gd::String &oldName, const gd::String &newName, bool isObjectGroup) {
+
   if (oldName == newName || newName.empty() || oldName.empty())
     return;
 
@@ -1647,7 +1826,7 @@ void WholeProjectRefactorer::ObjectOrGroupRenamedInScene(
   // Rename object in the current layout
   gd::EventsRefactorer::RenameObjectInEvents(
       project.GetCurrentPlatform(), projectScopedContainers, layout.GetEvents(),
-      oldName, newName);
+      layout.GetObjects(), oldName, newName);
 
   // Object groups can't have instances or be in other groups
   if (!isObjectGroup) {
@@ -1664,7 +1843,7 @@ void WholeProjectRefactorer::ObjectOrGroupRenamedInScene(
     auto &externalEvents = project.GetExternalEvents(externalEventsName);
     gd::EventsRefactorer::RenameObjectInEvents(
         project.GetCurrentPlatform(), projectScopedContainers,
-        externalEvents.GetEvents(), oldName, newName);
+        externalEvents.GetEvents(), layout.GetObjects(), oldName, newName);
   }
 
   // Rename object in external layouts
@@ -1910,8 +2089,8 @@ void WholeProjectRefactorer::ObjectOrGroupRenamedInEventsBasedObject(
        eventsBasedObject.GetEventsFunctions().GetInternalVector()) {
     auto *function = functionUniquePtr.get();
     WholeProjectRefactorer::ObjectOrGroupRenamedInEventsFunction(
-        project, projectScopedContainers, *function, oldName, newName,
-        isObjectGroup);
+        project, projectScopedContainers, *function,
+        eventsBasedObject.GetObjects(), oldName, newName, isObjectGroup);
   }
 
   // Object groups can't have instances or be in other groups
@@ -1928,11 +2107,12 @@ void WholeProjectRefactorer::ObjectOrGroupRenamedInEventsBasedObject(
 void WholeProjectRefactorer::ObjectOrGroupRenamedInEventsFunction(
     gd::Project &project,
     const gd::ProjectScopedContainers &projectScopedContainers,
-    gd::EventsFunction &eventsFunction, const gd::String &oldName,
-    const gd::String &newName, bool isObjectGroup) {
+    gd::EventsFunction &eventsFunction,
+    const gd::ObjectsContainer &targetedObjectsContainer,
+    const gd::String &oldName, const gd::String &newName, bool isObjectGroup) {
   gd::EventsRefactorer::RenameObjectInEvents(
       project.GetCurrentPlatform(), projectScopedContainers,
-      eventsFunction.GetEvents(), oldName, newName);
+      eventsFunction.GetEvents(), targetedObjectsContainer, oldName, newName);
 
   // Object groups can't be in other groups
   if (!isObjectGroup) {
@@ -1958,7 +2138,7 @@ void WholeProjectRefactorer::GlobalObjectOrGroupRenamed(
     if (layout.GetObjects().HasObjectNamed(oldName))
       continue;
 
-    ObjectOrGroupRenamedInScene(project, layout, oldName, newName,
+    ObjectOrGroupRenamedInScene(project, layout, project.GetObjects(), oldName, newName,
                                  isObjectGroup);
   }
 }
@@ -2090,4 +2270,23 @@ std::vector<gd::String> WholeProjectRefactorer::GetAssociatedExternalEvents(
   return results;
 }
 
+void WholeProjectRefactorer::RenameLeaderboards(
+    gd::Project &project,
+    const std::map<gd::String, gd::String> &leaderboardIdMap) {
+  gd::LeaderboardIdRenamer leaderboardIdRenamer(project);
+  leaderboardIdRenamer.SetLeaderboardIdsToReplace(leaderboardIdMap);
+
+  gd::ProjectBrowserHelper::ExposeProjectEvents(project, leaderboardIdRenamer);
+  gd::ProjectBrowserHelper::ExposeProjectObjects(project, leaderboardIdRenamer);
+}
+
+std::set<gd::String> WholeProjectRefactorer::FindAllLeaderboardIds(gd::Project &project) {
+  gd::LeaderboardIdRenamer leaderboardIdRenamer(project);
+
+  gd::ProjectBrowserHelper::ExposeProjectEvents(project, leaderboardIdRenamer);
+  gd::ProjectBrowserHelper::ExposeProjectObjects(project, leaderboardIdRenamer);
+
+  return leaderboardIdRenamer.GetAllLeaderboardIds();
+}
+
 } // namespace gd

Core/GDCore/IDE/WholeProjectRefactorer.h

@@ -27,14 +27,7 @@ class ObjectsContainer;
 class VariablesContainer;
 class EventsBasedBehavior;
 class EventsBasedObject;
-class ArbitraryEventsWorker;
-class ArbitraryObjectsWorker;
-class ArbitraryEventsFunctionsWorker;
-class ArbitraryEventsWorkerWithContext;
-class ArbitraryEventBasedBehaviorsWorker;
-class ArbitraryBehaviorSharedDataWorker;
 class Behavior;
-class BehaviorMetadata;
 class UnfilledRequiredBehaviorPropertyProblem;
 class ProjectBrowser;
 class SerializerElement;
@@ -121,14 +114,24 @@ class GD_CORE_API WholeProjectRefactorer {
       const gd::String& newName);
 
   /**
-   * \brief Refactor behavior events after the extension was placed in a new
+   * \brief Refactor behavior events after the behavior has been placed in a new
    * extension.
    */
   static void UpdateExtensionNameInEventsBasedBehavior(
-      gd::Project& project,
-      const gd::EventsFunctionsExtension& eventsFunctionsExtension,
-      gd::EventsBasedBehavior& eventsBasedBehavior,
-      const gd::String& sourceExtensionName);
+      gd::Project &project,
+      const gd::EventsFunctionsExtension &eventsFunctionsExtension,
+      gd::EventsBasedBehavior &eventsBasedBehavior,
+      const gd::String &sourceExtensionName);
+
+  /**
+   * \brief Refactor object events after the object has been placed in a new
+   * extension.
+   */
+  static void UpdateExtensionNameInEventsBasedObject(
+      gd::Project &project,
+      const gd::EventsFunctionsExtension &eventsFunctionsExtension,
+      gd::EventsBasedObject &eventsBasedObject,
+      const gd::String &sourceExtensionName);
 
   /**
    * \brief Refactor the project **before** an events function is renamed.
@@ -173,6 +176,31 @@ class GD_CORE_API WholeProjectRefactorer {
       const gd::String& oldFunctionName,
       const gd::String& newFunctionName);
 
+  /**
+   * \brief Refactor the function **before** a parameter is renamed.
+   *
+   * \warning Do the renaming of the specified parameter after calling this.
+   * This is because the function is expected to have its old name for the
+   * refactoring.
+   */
+  static void
+  RenameParameter(gd::Project &project,
+                  gd::ProjectScopedContainers &projectScopedContainers,
+                  gd::EventsFunction &eventsFunction,
+                  const gd::ObjectsContainer &parameterObjectsContainer,
+                  const gd::String &oldParameterName,
+                  const gd::String &newParameterName);
+
+  /**
+   * \brief Refactor the function **after** a parameter has changed of type.
+   */
+  static void
+  ChangeParameterType(gd::Project &project,
+                      gd::ProjectScopedContainers &projectScopedContainers,
+                      gd::EventsFunction &eventsFunction,
+                      const gd::ObjectsContainer &parameterObjectsContainer,
+                      const gd::String &parameterName);
+
   /**
    * \brief Refactor the project **before** an events function parameter
    * is moved.
@@ -265,6 +293,26 @@ class GD_CORE_API WholeProjectRefactorer {
       const gd::String& oldPropertyName,
       const gd::String& newPropertyName);
 
+  /**
+   * \brief Refactor the project **after** a property of a behavior has
+   * changed of type.
+   */
+  static void ChangeEventsBasedBehaviorPropertyType(
+      gd::Project &project,
+      const gd::EventsFunctionsExtension &eventsFunctionsExtension,
+      const gd::EventsBasedBehavior &eventsBasedBehavior,
+      const gd::String &propertyName);
+
+  /**
+   * \brief Refactor the project **after** a property of an object has
+   * changed of type.
+   */
+  static void ChangeEventsBasedObjectPropertyType(
+      gd::Project &project,
+      const gd::EventsFunctionsExtension &eventsFunctionsExtension,
+      const gd::EventsBasedObject &eventsBasedObject,
+      const gd::String &propertyName);
+
   /**
    * \brief Add a behavior to an object and add required behaviors if necessary
    * to fill every behavior properties of the added behaviors.
@@ -324,6 +372,16 @@ class GD_CORE_API WholeProjectRefactorer {
       const gd::String& oldBehaviorName,
       const gd::String& newBehaviorName);
 
+  /**
+   * \brief Refactor events-based behavior events after the events-based
+   * behavior has been duplicated.
+   */
+  static void UpdateBehaviorNameInEventsBasedBehavior(
+      gd::Project &project,
+      const gd::EventsFunctionsExtension &eventsFunctionsExtension,
+      gd::EventsBasedBehavior &eventsBasedBehavior,
+      const gd::String &sourceBehaviorName);
+
   /**
    * \brief Refactor the project **before** an object is renamed.
    *
@@ -337,6 +395,16 @@ class GD_CORE_API WholeProjectRefactorer {
       const gd::String& oldObjectName,
       const gd::String& newObjectName);
 
+  /**
+   * \brief Refactor events-based object events after the events-based object
+   * has been duplicated.
+   */
+  static void UpdateObjectNameInEventsBasedObject(
+      gd::Project &project,
+      const gd::EventsFunctionsExtension &eventsFunctionsExtension,
+      gd::EventsBasedObject &eventsBasedObject,
+      const gd::String &sourceObjectName);
+
   /**
    * \brief Refactor the project after a layout is renamed.
    */
@@ -506,6 +574,7 @@ class GD_CORE_API WholeProjectRefactorer {
       gd::Project& project,
       const gd::ProjectScopedContainers &projectScopedContainers,
       gd::EventsFunction& eventsFunction,
+      const gd::ObjectsContainer &targetedObjectsContainer,
       const gd::String& oldName,
       const gd::String& newName,
       bool isObjectGroup);
@@ -604,6 +673,18 @@ class GD_CORE_API WholeProjectRefactorer {
                                  const gd::String &originLayerName,
                                  const gd::String &targetLayerName);
 
+  /**
+   * \brief Replace the leaderboard ids in the whole project.
+   */
+  static void
+  RenameLeaderboards(gd::Project &project,
+                     const std::map<gd::String, gd::String> &leaderboardIdMap);
+
+  /**
+   * \brief Find all the leaderboard identifiers in the whole project.
+   */
+  static std::set<gd::String> FindAllLeaderboardIds(gd::Project &project);
+
   /**
    * \brief Return the number of instances on the layer named \a layerName and
    * all its associated layouts.
@@ -614,6 +695,12 @@ class GD_CORE_API WholeProjectRefactorer {
   virtual ~WholeProjectRefactorer(){};
 
  private:
+  static void ObjectOrGroupRenamedInScene(gd::Project &project,
+                                          gd::Layout &scene,
+                                          const gd::ObjectsContainer &targetedObjectsContainer,
+                                          const gd::String &oldName,
+                                          const gd::String &newName,
+                                          bool isObjectGroup);
   static std::vector<gd::String> GetAssociatedExternalLayouts(
       gd::Project& project, gd::Layout& layout);
   static std::vector<gd::String>
@@ -654,6 +741,35 @@ class GD_CORE_API WholeProjectRefactorer {
       const gd::String& newName,
       const gd::ProjectBrowser& projectBrowser);
 
+  /**
+   * \brief Refactor the project **before** a behavior is renamed.
+   *
+   * \warning Do the renaming of the specified behavior after calling this.
+   * This is because the behavior is expected to have its old name for the
+   * refactoring.
+   */
+  static void RenameEventsBasedBehavior(
+      gd::Project &project,
+      const gd::EventsFunctionsExtension &eventsFunctionsExtension,
+      const gd::EventsBasedBehavior &eventsBasedBehavior,
+      const gd::String &oldBehaviorName,
+      const gd::String &newBehaviorName,
+      const gd::ProjectBrowser &projectBrowser);
+
+  /**
+   * \brief Refactor the project **before** an object is renamed.
+   *
+   * \warning Do the renaming of the specified object after calling this.
+   * This is because the object is expected to have its old name for the
+   * refactoring.
+   */
+  static void RenameEventsBasedObject(
+      gd::Project &project,
+      const gd::EventsFunctionsExtension &eventsFunctionsExtension,
+      const gd::EventsBasedObject &eventsBasedObject,
+      const gd::String &oldObjectName, const gd::String &newObjectName,
+      const gd::ProjectBrowser &projectBrowser);
+
   static void FindDependentBehaviorNames(
       const gd::Project& project,
       const gd::Object& object,

Core/GDCore/Project/AbstractEventsBasedEntity.cpp

@@ -23,6 +23,9 @@ void AbstractEventsBasedEntity::SerializeTo(SerializerElement& element) const {
   element.SetAttribute("description", description);
   element.SetAttribute("name", name);
   element.SetAttribute("fullName", fullName);
+  if (isPrivate) {
+    element.SetBoolAttribute("private", isPrivate);
+  }
 
   gd::SerializerElement& eventsFunctionsElement =
       element.AddChild("eventsFunctions");
@@ -36,6 +39,7 @@ void AbstractEventsBasedEntity::UnserializeFrom(
   description = element.GetStringAttribute("description");
   name = element.GetStringAttribute("name");
   fullName = element.GetStringAttribute("fullName");
+  isPrivate = element.GetBoolAttribute("private");
 
   const gd::SerializerElement& eventsFunctionsElement =
       element.GetChild("eventsFunctions");

Core/GDCore/Project/AbstractEventsBasedEntity.h

@@ -3,8 +3,7 @@
  * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
  * reserved. This project is released under the MIT License.
  */
-#ifndef GDCORE_ABSTRACTEVENTSBASEDENTITY_H
-#define GDCORE_ABSTRACTEVENTSBASEDENTITY_H
+#pragma once
 
 #include <vector>
 #include "GDCore/Project/NamedPropertyDescriptor.h"
@@ -40,6 +39,21 @@ class GD_CORE_API AbstractEventsBasedEntity {
    */
   AbstractEventsBasedEntity* Clone() const { return new AbstractEventsBasedEntity(*this); };
 
+  /**
+   * \brief Check if the behavior or object is private - it can't be used outside of its
+   * extension.
+   */
+  bool IsPrivate() const { return isPrivate; }
+
+  /**
+   * \brief Set that the behavior or object is private - it can't be used outside of its
+   * extension.
+   */
+  AbstractEventsBasedEntity& SetPrivate(bool isPrivate_) {
+    isPrivate = isPrivate_;
+    return *this;
+  }
+
   /**
    * \brief Get the description of the behavior or object, that is displayed in the
    * editor.
@@ -151,8 +165,7 @@ class GD_CORE_API AbstractEventsBasedEntity {
   gd::EventsFunctionsContainer eventsFunctionsContainer;
   gd::PropertiesContainer propertyDescriptors;
   gd::String extensionName;
+  bool isPrivate = false;
 };
 
 }  // namespace gd
-
-#endif  // GDCORE_ABSTRACTEVENTSBASEDENTITY_H

Core/GDCore/Project/BehaviorConfigurationContainer.cpp

@@ -6,6 +6,7 @@
 #include "GDCore/Project/BehaviorConfigurationContainer.h"
 #include <iostream>
 #include "GDCore/Project/PropertyDescriptor.h"
+#include "GDCore/IDE/Project/ArbitraryResourceWorker.h"
 
 namespace gd {
 
@@ -22,4 +23,48 @@ std::map<gd::String, gd::PropertyDescriptor> BehaviorConfigurationContainer::Get
   return nothing;
 }
 
+void BehaviorConfigurationContainer::ExposeResources(gd::ArbitraryResourceWorker& worker) {
+  std::map<gd::String, gd::PropertyDescriptor> properties = GetProperties();
+
+  for (auto& property : properties) {
+    const String& propertyName = property.first;
+    const gd::PropertyDescriptor& propertyDescriptor = property.second;
+
+    if (propertyDescriptor.GetType().LowerCase() == "resource") {
+      auto& extraInfo = propertyDescriptor.GetExtraInfo();
+      const gd::String& resourceType = extraInfo.empty() ? "" : extraInfo[0];
+      const gd::String& oldPropertyValue = propertyDescriptor.GetValue();
+
+      gd::String newPropertyValue = oldPropertyValue;
+      if (resourceType == "image") {
+        worker.ExposeImage(newPropertyValue);
+      } else if (resourceType == "audio") {
+        worker.ExposeAudio(newPropertyValue);
+      } else if (resourceType == "font") {
+        worker.ExposeFont(newPropertyValue);
+      } else if (resourceType == "video") {
+        worker.ExposeVideo(newPropertyValue);
+      } else if (resourceType == "json") {
+        worker.ExposeJson(newPropertyValue);
+      } else if (resourceType == "tilemap") {
+        worker.ExposeTilemap(newPropertyValue);
+      } else if (resourceType == "tileset") {
+        worker.ExposeTileset(newPropertyValue);
+      } else if (resourceType == "bitmapFont") {
+        worker.ExposeBitmapFont(newPropertyValue);
+      } else if (resourceType == "model3D") {
+        worker.ExposeModel3D(newPropertyValue);
+      } else if (resourceType == "atlas") {
+        worker.ExposeAtlas(newPropertyValue);
+      } else if (resourceType == "spine") {
+        worker.ExposeSpine(newPropertyValue);
+      }
+
+      if (newPropertyValue != oldPropertyValue) {
+        UpdateProperty(propertyName, newPropertyValue);
+      }
+    }
+  }
+}
+
 }  // namespace gd

Core/GDCore/Project/BehaviorConfigurationContainer.h

@@ -3,13 +3,14 @@
  * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
  * reserved. This project is released under the MIT License.
  */
-#ifndef GDCORE_BEHAVIORCONFIGURATIONCONTAINER_H
-#define GDCORE_BEHAVIORCONFIGURATIONCONTAINER_H
+#pragma once
 
 #include <map>
 #include <memory>
-#include "GDCore/Serialization/Serializer.h"
+
 #include "GDCore/Project/QuickCustomization.h"
+#include "GDCore/Project/QuickCustomizationVisibilitiesContainer.h"
+#include "GDCore/Serialization/Serializer.h"
 #include "GDCore/String.h"
 
 namespace gd {
@@ -17,6 +18,7 @@ class PropertyDescriptor;
 class SerializerElement;
 class Project;
 class Layout;
+class ArbitraryResourceWorker;
 }  // namespace gd
 
 namespace gd {
@@ -32,12 +34,21 @@ namespace gd {
  */
 class GD_CORE_API BehaviorConfigurationContainer {
  public:
-  BehaviorConfigurationContainer() : folded(false), quickCustomizationVisibility(QuickCustomization::Visibility::Default){};
+  BehaviorConfigurationContainer()
+      : folded(false),
+        quickCustomizationVisibility(QuickCustomization::Visibility::Default),
+        propertiesQuickCustomizationVisibilities() {};
   BehaviorConfigurationContainer(const gd::String& name_,
                                  const gd::String& type_)
-      : name(name_), type(type_), folded(false), quickCustomizationVisibility(QuickCustomization::Visibility::Default){};
+      : name(name_),
+        type(type_),
+        folded(false),
+        quickCustomizationVisibility(QuickCustomization::Visibility::Default),
+        propertiesQuickCustomizationVisibilities() {};
   virtual ~BehaviorConfigurationContainer();
-  virtual BehaviorConfigurationContainer* Clone() const { return new BehaviorConfigurationContainer(*this); }
+  virtual BehaviorConfigurationContainer* Clone() const {
+    return new BehaviorConfigurationContainer(*this);
+  }
 
   /**
    * \brief Return the name identifying the behavior
@@ -68,7 +79,6 @@ class GD_CORE_API BehaviorConfigurationContainer {
    */
   std::map<gd::String, gd::PropertyDescriptor> GetProperties() const;
 
-
   /**
    * \brief Called when the IDE wants to update a custom property of the
    * behavior
@@ -84,9 +94,7 @@ class GD_CORE_API BehaviorConfigurationContainer {
    * \brief Called to initialize the content with the default properties
    * for the behavior.
    */
-  virtual void InitializeContent() {
-    InitializeContent(content);
-  };
+  virtual void InitializeContent() { InitializeContent(content); };
 
   /**
    * \brief Serialize the behavior content.
@@ -115,15 +123,54 @@ class GD_CORE_API BehaviorConfigurationContainer {
    */
   bool IsFolded() const { return folded; }
 
-  void SetQuickCustomizationVisibility(QuickCustomization::Visibility visibility) {
+  /**
+   * @brief Set if the whole behavior should be visible or not in the Quick
+   * Customization.
+   */
+  void SetQuickCustomizationVisibility(
+      QuickCustomization::Visibility visibility) {
     quickCustomizationVisibility = visibility;
   }
 
+  /**
+   * @brief Get if the whole behavior should be visible or not in the Quick
+   * Customization.
+   */
   QuickCustomization::Visibility GetQuickCustomizationVisibility() const {
     return quickCustomizationVisibility;
   }
 
-protected:
+  /**
+   * @brief Get the map of properties and their visibility in the Quick
+   * Customization.
+   */
+  QuickCustomizationVisibilitiesContainer&
+  GetPropertiesQuickCustomizationVisibilities() {
+    return propertiesQuickCustomizationVisibilities;
+  }
+
+  /**
+   * @brief Get the map of properties and their visibility in the Quick
+   * Customization.
+   */
+  const QuickCustomizationVisibilitiesContainer&
+  GetPropertiesQuickCustomizationVisibilities() const {
+    return propertiesQuickCustomizationVisibilities;
+  }
+
+  /**
+   * \brief Called ( e.g. during compilation ) so as to inventory internal
+   * resources and sometimes update their filename. Implementation example:
+   * \code
+   * worker.ExposeImage(myImage);
+   * worker.ExposeFile(myResourceFile);
+   * \endcode
+   *
+   * \see ArbitraryResourceWorker
+   */
+  void ExposeResources(gd::ArbitraryResourceWorker& worker);
+
+ protected:
   /**
    * \brief Called when the IDE wants to know about the custom properties of the
    * behavior.
@@ -159,7 +206,7 @@ protected:
    * \brief Called to initialize the content with the default properties
    * for the behavior.
    */
-  virtual void InitializeContent(gd::SerializerElement& behaviorContent){};
+  virtual void InitializeContent(gd::SerializerElement& behaviorContent) {};
 
  private:
   gd::String name;  ///< Name of the behavior
@@ -169,8 +216,8 @@ protected:
   gd::SerializerElement content;  // Storage for the behavior properties
   bool folded;
   QuickCustomization::Visibility quickCustomizationVisibility;
+  QuickCustomizationVisibilitiesContainer
+      propertiesQuickCustomizationVisibilities;
 };
 
 }  // namespace gd
-
-#endif  // GDCORE_BEHAVIORCONFIGURATIONCONTAINER_H

Core/GDCore/Project/CustomConfigurationHelper.cpp

@@ -22,15 +22,17 @@ void CustomConfigurationHelper::InitializeContent(
     gd::SerializerElement &configurationContent) {
   for (auto &&property : properties.GetInternalVector()) {
     auto &element = configurationContent.AddChild(property->GetName());
-    auto propertyType = property->GetType();
 
-    if (propertyType == "String" || propertyType == "Choice" ||
-        propertyType == "Color" || propertyType == "Behavior" ||
-        propertyType == "Resource") {
+    const auto &valueType =
+        gd::ValueTypeMetadata::ConvertPropertyTypeToValueType(
+            property->GetType());
+    const auto &primitiveType =
+        gd::ValueTypeMetadata::GetPrimitiveValueType(valueType);
+    if (primitiveType == "string" || valueType == "behavior") {
       element.SetStringValue(property->GetValue());
-    } else if (propertyType == "Number") {
+    } else if (primitiveType == "number") {
       element.SetDoubleValue(property->GetValue().To<double>());
-    } else if (propertyType == "Boolean") {
+    } else if (primitiveType == "boolean") {
       element.SetBoolValue(property->GetValue() == "true");
     }
   }
@@ -43,23 +45,25 @@ std::map<gd::String, gd::PropertyDescriptor> CustomConfigurationHelper::GetPrope
 
   for (auto &property : properties.GetInternalVector()) {
     const auto &propertyName = property->GetName();
-    const auto &propertyType = property->GetType();
 
     // Copy the property
     objectProperties[propertyName] = *property;
 
     auto &newProperty = objectProperties[propertyName];
 
+    const auto &valueType =
+        gd::ValueTypeMetadata::ConvertPropertyTypeToValueType(
+            property->GetType());
+    const auto &primitiveType =
+        gd::ValueTypeMetadata::GetPrimitiveValueType(valueType);
     if (configurationContent.HasChild(propertyName)) {
-      if (propertyType == "String" || propertyType == "Choice" ||
-          propertyType == "Color" || propertyType == "Behavior" ||
-          propertyType == "Resource") {
+      if (primitiveType == "string" || valueType == "behavior") {
         newProperty.SetValue(
             configurationContent.GetChild(propertyName).GetStringValue());
-      } else if (propertyType == "Number") {
+      } else if (primitiveType == "number") {
         newProperty.SetValue(gd::String::From(
             configurationContent.GetChild(propertyName).GetDoubleValue()));
-      } else if (propertyType == "Boolean") {
+      } else if (primitiveType == "boolean") {
         newProperty.SetValue(
             configurationContent.GetChild(propertyName).GetBoolValue()
                 ? "true"
@@ -85,15 +89,16 @@ bool CustomConfigurationHelper::UpdateProperty(
   const auto &property = properties.Get(propertyName);
 
   auto &element = configurationContent.AddChild(propertyName);
-  const gd::String &propertyType = property.GetType();
 
-  if (propertyType == "String" || propertyType == "Choice" ||
-      propertyType == "Color" || propertyType == "Behavior" ||
-      propertyType == "Resource") {
+  const auto &valueType =
+      gd::ValueTypeMetadata::ConvertPropertyTypeToValueType(property.GetType());
+  const auto &primitiveType =
+      gd::ValueTypeMetadata::GetPrimitiveValueType(valueType);
+  if (primitiveType == "string" || valueType == "behavior") {
     element.SetStringValue(newValue);
-  } else if (propertyType == "Number") {
+  } else if (primitiveType == "number") {
     element.SetDoubleValue(newValue.To<double>());
-  } else if (propertyType == "Boolean") {
+  } else if (primitiveType == "boolean") {
     element.SetBoolValue(newValue == "1");
   }
 

Core/GDCore/Project/CustomObjectConfiguration.cpp

@@ -72,7 +72,7 @@ gd::ObjectConfiguration &CustomObjectConfiguration::GetChildObjectConfiguration(
   }
 
   if (!eventsBasedObject->GetObjects().HasObjectNamed(objectName)) {
-    gd::LogError("Tried to get the configuration of a child-object:" + objectName
+    gd::LogError("Tried to get the configuration of a child-object: " + objectName
                 + " that doesn't exist in the event-based object: " + GetType());
     return badObjectConfiguration;
   }
@@ -158,7 +158,9 @@ bool CustomObjectConfiguration::UpdateInitialInstanceProperty(
 void CustomObjectConfiguration::DoSerializeTo(SerializerElement& element) const {
   element.AddChild("content") = objectContent;
 
-  if (!animations.HasNoAnimations()) {
+  const auto *eventsBasedObject = GetEventsBasedObject();
+  if (!animations.HasNoAnimations() ||
+      (eventsBasedObject && eventsBasedObject->IsAnimatable())) {
     auto &animatableElement = element.AddChild("animatable");
     animations.SerializeTo(animatableElement);
   }
@@ -202,8 +204,8 @@ void CustomObjectConfiguration::ExposeResources(gd::ArbitraryResourceWorker& wor
 
   for (auto& property : properties) {
     const String& propertyName = property.first;
-    const gd::PropertyDescriptor& propertyDescriptor = property.second;
-    if (propertyDescriptor.GetType() == "resource") {
+    const gd::PropertyDescriptor &propertyDescriptor = property.second;
+    if (propertyDescriptor.GetType().LowerCase() == "resource") {
       auto& extraInfo = propertyDescriptor.GetExtraInfo();
       const gd::String& resourceType = extraInfo.empty() ? "" : extraInfo[0];
       const gd::String& oldPropertyValue = propertyDescriptor.GetValue();
@@ -272,3 +274,16 @@ const SpriteAnimationList& CustomObjectConfiguration::GetAnimations() const {
 SpriteAnimationList& CustomObjectConfiguration::GetAnimations() {
   return animations;
 }
+
+const gd::CustomObjectConfiguration::EdgeAnchor
+CustomObjectConfiguration::GetEdgeAnchorFromString(const gd::String &value) {
+  return (value == _("Window left") || value == _("Window top"))
+             ? gd::CustomObjectConfiguration::EdgeAnchor::MinEdge
+         : (value == _("Window right") || value == _("Window bottom"))
+             ? gd::CustomObjectConfiguration::EdgeAnchor::MaxEdge
+         : value == _("Proportional")
+             ? gd::CustomObjectConfiguration::EdgeAnchor::Proportional
+         : value == _("Window center")
+             ? gd::CustomObjectConfiguration::EdgeAnchor::Center
+             : gd::CustomObjectConfiguration::EdgeAnchor::NoAnchor;
+}

Core/GDCore/Project/CustomObjectConfiguration.h

@@ -9,6 +9,7 @@
 
 #include <map>
 #include <memory>
+#include <unordered_set>
 #include "GDCore/Project/Object.h"
 #include "GDCore/Project/Project.h"
 #include "GDCore/Project/EventsBasedObject.h"
@@ -98,6 +99,38 @@ class CustomObjectConfiguration : public gd::ObjectConfiguration {
    */
   SpriteAnimationList& GetAnimations();
 
+  enum EdgeAnchor {
+    NoAnchor = 0,
+    MinEdge = 1,
+    MaxEdge = 2,
+    Proportional = 3,
+    Center = 4,
+  };
+
+  static const gd::CustomObjectConfiguration::EdgeAnchor
+  GetEdgeAnchorFromString(const gd::String &value);
+
+  /**
+   * Check if a child object properties must be displayed as folded in the editor.
+   * This is only useful when the object can override its children configuration (which
+   * is something being deprecated).
+   */
+  bool IsChildObjectFolded(const gd::String& childName) const {
+    return unfoldedChildren.find(childName) == unfoldedChildren.end();
+  }
+
+  /**
+   * Set if a child object properties must be displayed as folded in the editor.
+   * This is only useful when the object can override its children configuration (which
+   * is something being deprecated).
+   */
+  void SetChildObjectFolded(const gd::String& childName, bool folded) {
+    if (!folded)
+      unfoldedChildren.insert(childName);
+    else
+      unfoldedChildren.erase(childName);
+  }
+
 protected:
   void DoSerializeTo(SerializerElement& element) const override;
   void DoUnserializeFrom(Project& project, const SerializerElement& element) override;
@@ -107,11 +140,12 @@ protected:
 
   bool IsOverridingEventsBasedObjectChildrenConfiguration() const;
 
-  const Project* project; ///< The project is used to get the
-                          ///< EventBasedObject from the fullType.
+  const Project* project = nullptr; ///< The project is used to get the
+                                    ///< EventBasedObject from the fullType.
   gd::SerializerElement objectContent;
-  
-  bool isMarkedAsOverridingEventsBasedObjectChildrenConfiguration;
+  std::unordered_set<gd::String> unfoldedChildren;
+
+  bool isMarkedAsOverridingEventsBasedObjectChildrenConfiguration = false;
   mutable std::map<gd::String, std::unique_ptr<gd::ObjectConfiguration>> childObjectConfigurations;
 
   static gd::ObjectConfiguration badObjectConfiguration;

Core/GDCore/Project/Effect.cpp

@@ -12,6 +12,7 @@ namespace gd {
 void Effect::SerializeTo(SerializerElement& element) const {
   element.SetAttribute("name", GetName());
   element.SetAttribute("effectType", GetEffectType());
+  if (IsFolded()) element.SetBoolAttribute("folded", true);
 
   SerializerElement& doubleParametersElement =
       element.AddChild("doubleParameters");
@@ -41,6 +42,7 @@ void Effect::UnserializeFrom(const SerializerElement& element) {
       "effectName"
       // end of compatibility code
       ));
+  SetFolded(element.GetBoolAttribute("folded", false));
 
   doubleParameters.clear();
   const SerializerElement& doubleParametersElement =

Core/GDCore/Project/Effect.h

@@ -21,8 +21,8 @@ namespace gd {
  */
 class GD_CORE_API Effect {
  public:
-  Effect(){};
-  virtual ~Effect(){};
+  Effect() : folded(false) {};
+  virtual ~Effect() {};
 
   void SetName(const gd::String& name_) { name = name_; }
   const gd::String& GetName() const { return name; }
@@ -32,6 +32,9 @@ class GD_CORE_API Effect {
   }
   const gd::String& GetEffectType() const { return effectType; }
 
+  void SetFolded(bool fold = true) { folded = fold; }
+  bool IsFolded() const { return folded; }
+
   void SetDoubleParameter(const gd::String& name, double value) {
     doubleParameters[name] = value;
   }
@@ -85,6 +88,7 @@ class GD_CORE_API Effect {
   void UnserializeFrom(const SerializerElement& element);
 
  private:
+  bool folded;
   gd::String name;        ///< The name of the layer.
   gd::String effectType;  ///< The name of the effect to apply.
   std::map<gd::String, double> doubleParameters; ///< Values of parameters being doubles, keyed by names.

Core/GDCore/Project/EventsBasedBehavior.cpp

@@ -21,9 +21,6 @@ EventsBasedBehavior::EventsBasedBehavior()
 void EventsBasedBehavior::SerializeTo(SerializerElement& element) const {
   AbstractEventsBasedEntity::SerializeTo(element);
   element.SetAttribute("objectType", objectType);
-  if (isPrivate) {
-    element.SetBoolAttribute("private", isPrivate);
-  }
   sharedPropertyDescriptors.SerializeElementsTo(
       "propertyDescriptor", element.AddChild("sharedPropertyDescriptors"));
   if (quickCustomizationVisibility != QuickCustomization::Visibility::Default) {
@@ -39,7 +36,6 @@ void EventsBasedBehavior::UnserializeFrom(gd::Project& project,
                                           const SerializerElement& element) {
   AbstractEventsBasedEntity::UnserializeFrom(project, element);
   objectType = element.GetStringAttribute("objectType");
-  isPrivate = element.GetBoolAttribute("private");
   sharedPropertyDescriptors.UnserializeElementsFrom(
       "propertyDescriptor", element.GetChild("sharedPropertyDescriptors"));
   if (element.HasChild("quickCustomizationVisibility")) {

Core/GDCore/Project/EventsBasedBehavior.h

@@ -3,8 +3,7 @@
  * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
  * reserved. This project is released under the MIT License.
  */
-#ifndef GDCORE_EVENTSBASEDBEHAVIOR_H
-#define GDCORE_EVENTSBASEDBEHAVIOR_H
+#pragma once
 
 #include <vector>
 #include "GDCore/Project/AbstractEventsBasedEntity.h"
@@ -75,17 +74,11 @@ class GD_CORE_API EventsBasedBehavior: public AbstractEventsBasedEntity {
   }
 
   /**
-   * \brief Check if the behavior is private - it can't be used outside of its
+   * \brief Set that the behavior or object is private - it can't be used outside of its
    * extension.
    */
-  bool IsPrivate() const { return isPrivate; }
-
-  /**
-   * \brief Set that the behavior is private - it can't be used outside of its
-   * extension.
-   */
-  EventsBasedBehavior& SetPrivate(bool _isPrivate) {
-    isPrivate = _isPrivate;
+  EventsBasedBehavior& SetPrivate(bool isPrivate) {
+    AbstractEventsBasedEntity::SetPrivate(isPrivate);
     return *this;
   }
 
@@ -149,11 +142,8 @@ class GD_CORE_API EventsBasedBehavior: public AbstractEventsBasedEntity {
 
  private:
   gd::String objectType;
-  bool isPrivate = false;
   gd::PropertiesContainer sharedPropertyDescriptors;
   QuickCustomization::Visibility quickCustomizationVisibility;
 };
 
 }  // namespace gd
-
-#endif  // GDCORE_EVENTSBASEDBEHAVIOR_H

Core/GDCore/Project/EventsBasedObject.cpp

@@ -17,12 +17,14 @@ EventsBasedObject::EventsBasedObject()
     isAnimatable(false),
     isTextContainer(false),
     isInnerAreaFollowingParentSize(false),
+    isUsingLegacyInstancesRenderer(false),
     areaMinX(0),
     areaMinY(0),
     areaMinZ(0),
     areaMaxX(64),
     areaMaxY(64),
-    areaMaxZ(64) {
+    areaMaxZ(64),
+    objectsContainer(gd::ObjectsContainer::SourceType::Object) {
 }
 
 EventsBasedObject::~EventsBasedObject() {}
@@ -41,6 +43,7 @@ void EventsBasedObject::SerializeTo(SerializerElement& element) const {
   if (isInnerAreaFollowingParentSize) {
     element.SetBoolAttribute("isInnerAreaFollowingParentSize", true);
   }
+  element.SetBoolAttribute("isUsingLegacyInstancesRenderer", isUsingLegacyInstancesRenderer);
   element.SetIntAttribute("areaMinX", areaMinX);
   element.SetIntAttribute("areaMinY", areaMinY);
   element.SetIntAttribute("areaMinZ", areaMinZ);
@@ -88,6 +91,15 @@ void EventsBasedObject::UnserializeFrom(gd::Project& project,
   }
 
   initialInstances.UnserializeFrom(element.GetChild("instances"));
+  if (element.HasChild("isUsingLegacyInstancesRenderer")) {
+    isUsingLegacyInstancesRenderer =
+        element.GetBoolAttribute("isUsingLegacyInstancesRenderer", false);
+  }
+  else {
+    // Compatibility with GD <= 5.4.212
+    isUsingLegacyInstancesRenderer = initialInstances.GetInstancesCount() == 0;
+    // end of compatibility code
+  }
 }
 
 }  // namespace gd

Core/GDCore/Project/EventsBasedObject.h

@@ -72,6 +72,15 @@ class GD_CORE_API EventsBasedObject: public AbstractEventsBasedEntity {
     return *this;
   }
 
+  /**
+   * \brief Set that the object is private - it can't be used outside of its
+   * extension.
+   */
+  EventsBasedObject& SetPrivate(bool isPrivate) {
+    AbstractEventsBasedEntity::SetPrivate(isPrivate);
+    return *this;
+  }
+
   /**
    * \brief Declare a usage of the 3D renderer.
    */
@@ -111,7 +120,7 @@ class GD_CORE_API EventsBasedObject: public AbstractEventsBasedEntity {
    * adapt there size. This is removing the ScalableCapability.
    */
   EventsBasedObject &
-  MarkAsInnerAreaExpandingWithParent(bool isInnerAreaExpandingWithParent_) {
+  MarkAsInnerAreaFollowingParentSize(bool isInnerAreaExpandingWithParent_) {
     isInnerAreaFollowingParentSize = isInnerAreaExpandingWithParent_;
     return *this;
   }
@@ -130,6 +139,24 @@ class GD_CORE_API EventsBasedObject: public AbstractEventsBasedEntity {
     return isInnerAreaFollowingParentSize;
   }
 
+  /**
+   * \brief Declare that custom object are rendered using their child-objects
+   * instead of their child-instances.
+   */
+  EventsBasedObject &
+  MakAsUsingLegacyInstancesRenderer(bool isUsingLegacyInstancesRenderer_) {
+    isUsingLegacyInstancesRenderer = isUsingLegacyInstancesRenderer_;
+    return *this;
+  }
+
+  /**
+   * \brief Return true if custom object are rendered using their child-objects
+   * instead of their child-instances.
+   */
+  bool IsUsingLegacyInstancesRenderer() const {
+    return isUsingLegacyInstancesRenderer;
+  }
+
   /**
    * \brief Return true if the object needs a TextContainer capability.
    */
@@ -304,6 +331,7 @@ class GD_CORE_API EventsBasedObject: public AbstractEventsBasedEntity {
   bool isAnimatable;
   bool isTextContainer;
   bool isInnerAreaFollowingParentSize;
+  bool isUsingLegacyInstancesRenderer;
   gd::InitialInstancesContainer initialInstances;
   gd::LayersContainer layers;
   gd::ObjectsContainer objectsContainer;