Remove templates page

* The games you create are now accessible in one place only, simplifying the whole creation experience
* From the Create tab, you can now access the projects you're working on, as well as manage the games you have published

.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 +233,83 @@ 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:
+          # Extra checks are resource intensive so don't all run them.
+          filters:
+            branches:
+              only:
+                - master
+                - /experimental-build.*/
+  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

.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/GDevelopExtensions.code-snippets

@@ -107,7 +107,7 @@
     "description": "Define a parameter in a GDevelop extension definition.",
     "prefix": "gdparam",
     "body": [
-      ".addParameter('${1|string,expression,object,behavior,yesorno,stringWithSelector,scenevar,globalvar,objectvar,objectList,objectListWithoutPicking,color,key,sceneName,file,layer,relationalOperator,operator,trueorfalse,musicfile,soundfile,police,mouse,passwordjoyaxis,camera,objectPtr,forceMultiplier|}', '${2:Parameter description}', '${3:Optional parameter data}', /*parameterIsOptional=*/${4|false,true|})"
+      ".addParameter('${1|string,expression,object,behavior,yesorno,stringWithSelector,scenevar,globalvar,objectvar,objectList,objectListWithoutPicking,color,key,sceneName,file,layer,relationalOperator,operator,trueorfalse,musicfile,soundfile,mouse,passwordjoyaxis,camera,objectPtr,forceMultiplier|}', '${2:Parameter description}', '${3:Optional parameter data}', /*parameterIsOptional=*/${4|false,true|})"
     ]
   },
   "Add code only parameter": {

.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

@@ -77,11 +77,11 @@ gd::String EventsCodeGenerator::GenerateRelationalOperatorCall(
 
 /**
  * @brief Generate a relational operation
- * 
+ *
  * @param relationalOperator the operator
  * @param lhs the left hand operand
  * @param rhs the right hand operand
- * @return gd::String 
+ * @return gd::String
  */
 gd::String EventsCodeGenerator::GenerateRelationalOperation(
     const gd::String& relationalOperator,
@@ -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. */";
       }
     }
@@ -828,7 +828,7 @@ gd::String EventsCodeGenerator::GenerateParameterCodes(
              metadata.GetType() == "spineResource" ||
              // Deprecated, old parameter names:
              metadata.GetType() == "password" || metadata.GetType() == "musicfile" ||
-             metadata.GetType() == "soundfile" || metadata.GetType() == "police") {
+             metadata.GetType() == "soundfile") {
     argOutput = "\"" + ConvertToString(parameter.GetPlainString()) + "\"";
   } else if (metadata.GetType() == "mouse") {
     argOutput = "\"" + ConvertToString(parameter.GetPlainString()) + "\"";
@@ -1007,7 +1007,7 @@ gd::String EventsCodeGenerator::GenerateEventsListCode(
 
     output += "\n" + scopeBegin + "\n" + declarationsCode + "\n" +
               eventCoreCode + "\n" + scopeEnd + "\n";
-    
+
     if (event.HasVariables()) {
       GetProjectScopedContainers().GetVariablesContainersList().Pop();
     }

Core/GDCore/Events/CodeGeneration/EventsCodeGenerator.h

@@ -528,7 +528,7 @@ protected:
   parameter -> string
    * - operator : Used to update a value using a setter and a getter -> string
    * - key, mouse, objectvar, scenevar, globalvar, password, musicfile,
-  soundfile, police -> string
+  soundfile -> string
    * - trueorfalse, yesorno -> boolean ( See GenerateTrue/GenerateFalse ).
    *
    * <br><br>
@@ -849,7 +849,7 @@ protected:
       instructionUniqueIds;  ///< The unique ids generated for instructions.
   size_t eventsListNextUniqueId;  ///< The next identifier to use for an events
                                   ///< list function name.
-  
+
   gd::DiagnosticReport* diagnosticReport;
 };
 

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/MouseExtension.cpp

@@ -338,6 +338,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsMouseExtension(
       .AddParameter("expression", _("Camera number (default : 0)"), "", true)
       .SetDefaultValue("0");
 
+  // Deprecated
   extension
       .AddCondition(
           "PopStartedTouch",
@@ -354,6 +355,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsMouseExtension(
       .AddCodeOnlyParameter("currentScene", "")
       .SetHidden();
 
+  // Deprecated
   extension
       .AddCondition(
           "PopEndedTouch",
@@ -370,6 +372,7 @@ 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/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

@@ -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/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

@@ -54,7 +54,7 @@ ObjectMetadata::ObjectMetadata(const gd::String& extensionNamespace_,
                      []() -> std::unique_ptr<gd::ObjectConfiguration> {
       gd::LogFatalError(
           "Error: Event-based objects don't have blueprint. "
-          "This method should not never be called.");
+          "This method should never be called.");
       return nullptr;
     }) {}
 

Core/GDCore/Extensions/Metadata/ObjectMetadata.h

@@ -246,6 +246,11 @@ 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; }
@@ -323,6 +328,15 @@ 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;
@@ -344,6 +358,7 @@ class GD_CORE_API ObjectMetadata : public InstructionOrExpressionContainerMetada
   std::set<gd::String> defaultBehaviorTypes;
   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;
@@ -23,7 +23,10 @@ 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) {
@@ -31,34 +34,97 @@ void ParameterMetadataTools::ParametersToObjectsContainer(
     if (parameter.GetName().empty()) continue;
 
     if (gd::ParameterMetadata::IsObject(parameter.GetType())) {
-      outputObjectsContainer.InsertNewObject(
-          project,
-          parameter.GetExtraInfo(),
-          parameter.GetName(),
-          outputObjectsContainer.GetObjectsCount());
+      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();
+      lastObjectName = objectName;
     } else if (gd::ParameterMetadata::IsBehavior(parameter.GetType())) {
       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/ValueTypeMetadata.cpp

@@ -53,27 +53,32 @@ 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::ConvertPropertyTypeToValueType(
     const gd::String &propertyType) {
@@ -85,6 +90,10 @@ 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;
   }
   // For "String" or default
   return stringValueType;

Core/GDCore/Extensions/Metadata/ValueTypeMetadata.h

@@ -111,21 +111,21 @@ 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);
   }
 
   /**
@@ -135,7 +135,17 @@ class GD_CORE_API ValueTypeMetadata {
    * 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";
   }
 
   /**
@@ -175,7 +185,9 @@ 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 +198,7 @@ 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" ||
@@ -227,6 +240,26 @@ 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 +311,11 @@ 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;
 };
 
 }  // namespace gd

Core/GDCore/Extensions/PlatformExtension.cpp

@@ -808,6 +808,24 @@ 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

@@ -40,8 +40,7 @@ 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 +50,25 @@ 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 {
@@ -239,11 +238,12 @@ 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 +253,10 @@ 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 +419,7 @@ 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;
@@ -634,26 +632,30 @@ 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 +670,10 @@ 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.

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/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.IsVariable();
+        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().IsVariable(),
+              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().IsVariable(), 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.IsVariable();
+        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().IsVariable(),
+              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().IsVariable(), 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/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;
@@ -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(),
@@ -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.
       }

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(){};
 
   /**
@@ -225,7 +228,8 @@ 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 +268,13 @@ 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 +287,7 @@ 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. "
@@ -369,6 +380,11 @@ class GD_CORE_API ExpressionValidator : public ExpressionParser2NodeWorker {
   enum Type {Unknown = 0, Number, String, NumberOrString, Variable, LegacyVariable, Object, Empty};
   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") {
@@ -505,6 +521,8 @@ 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/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/EventsFunctionTools.cpp

@@ -24,15 +24,16 @@ 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();
 }
 
@@ -97,26 +98,6 @@ 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());
-  }
-  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());
-  }
 }
 
 }  // namespace gd

Core/GDCore/IDE/EventsFunctionTools.h

@@ -68,9 +68,5 @@ class GD_CORE_API EventsFunctionTools {
       const gd::EventsBasedObject& eventsBasedObject,
       const gd::EventsFunction& eventsFunction,
       gd::ObjectsContainer& outputObjectsContainer);
-
-  static void CopyEventsBasedObjectChildrenToObjectsContainer(
-      const gd::EventsBasedObject &eventsBasedObject,
-      gd::ObjectsContainer &outputObjectsContainer);
 };
 }  // 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

@@ -225,9 +225,7 @@ bool ResourceWorkerInEventsWorker::DoVisitInstruction(gd::Instruction& instructi
                             size_t parameterIndex,
                             const gd::String& lastObjectName) {
         const String& parameterValue = parameterExpression.GetPlainString();
-        if (parameterMetadata.GetType() ==
-                "police" ||  // Should be renamed fontResource
-            parameterMetadata.GetType() == "fontResource") {
+        if (parameterMetadata.GetType() == "fontResource") {
           gd::String updatedParameterValue = parameterValue;
           worker.ExposeFont(updatedParameterValue);
           instruction.SetParameter(parameterIndex, updatedParameterValue);
@@ -295,7 +293,7 @@ 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/ProjectBrowserHelper.cpp

@@ -170,7 +170,8 @@ void ProjectBrowserHelper::ExposeEventsFunctionsExtensionEvents(
     gd::ArbitraryEventsWorkerWithContext &worker) {
     // Add (free) events functions
     for (auto &&eventsFunction : eventsFunctionsExtension.GetInternalVector()) {
-      gd::ObjectsContainer parameterObjectsContainer;
+      gd::ObjectsContainer parameterObjectsContainer(
+          gd::ObjectsContainer::SourceType::Function);
       auto projectScopedContainers = gd::ProjectScopedContainers::
           MakeNewProjectScopedContainersForFreeEventsFunction(
               project, eventsFunctionsExtension, *eventsFunction,
@@ -209,7 +210,8 @@ void ProjectBrowserHelper::ExposeEventsBasedBehaviorEvents(
   auto &behaviorEventsFunctions = eventsBasedBehavior.GetEventsFunctions();
   for (auto &&eventsFunction : behaviorEventsFunctions.GetInternalVector()) {
 
-    gd::ObjectsContainer parameterObjectsContainers;
+    gd::ObjectsContainer parameterObjectsContainers(
+        gd::ObjectsContainer::SourceType::Function);
     auto projectScopedContainers = gd::ProjectScopedContainers::
         MakeNewProjectScopedContainersForBehaviorEventsFunction(
             project, eventsFunctionsExtension, eventsBasedBehavior,
@@ -236,7 +238,8 @@ void ProjectBrowserHelper::ExposeEventsBasedObjectEvents(
   auto &objectEventsFunctions = eventsBasedObject.GetEventsFunctions();
   for (auto &&eventsFunction : objectEventsFunctions.GetInternalVector()) {
 
-    gd::ObjectsContainer parameterObjectsContainers;
+    gd::ObjectsContainer parameterObjectsContainers(
+        gd::ObjectsContainer::SourceType::Function);
     auto projectScopedContainers = gd::ProjectScopedContainers::
         MakeNewProjectScopedContainersForObjectEventsFunction(
             project, eventsFunctionsExtension, eventsBasedObject,

Core/GDCore/IDE/PropertyFunctionGenerator.cpp

@@ -247,7 +247,7 @@ bool PropertyFunctionGenerator::CanGenerateGetterAndSetter(
     const gd::NamedPropertyDescriptor &property) {
   auto &type = property.GetType();
   if (type != "Boolean" && type != "Number" && type != "String" &&
-      type != "Choice" && type != "Color") {
+      type != "Choice" && type != "Color" && type != "LeaderboardId") {
     return false;
   }
 

Core/GDCore/IDE/ResourceExposer.cpp

@@ -6,17 +6,9 @@
 #include "ResourceExposer.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/EventsFunctionsExtension.h"
-#include "GDCore/Project/ExternalEvents.h"
 #include "GDCore/Project/Layout.h"
 #include "GDCore/Project/Project.h"
 #include "GDCore/Project/Effect.h"
@@ -24,7 +16,6 @@
 #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 {
 

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(
@@ -807,6 +817,51 @@ 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::MoveEventsFunctionParameter(
     gd::Project &project,
     const gd::EventsFunctionsExtension &eventsFunctionsExtension,
@@ -941,6 +996,8 @@ 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 +1007,16 @@ 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 +1071,8 @@ 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 +1082,16 @@ 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 +1132,8 @@ 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 +1143,16 @@ 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,
@@ -1312,6 +1379,19 @@ 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 +1404,22 @@ 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 +1433,12 @@ 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 +1449,7 @@ 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 +1459,7 @@ 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 +1467,7 @@ 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 +1478,7 @@ 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 +1491,7 @@ 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 +1526,25 @@ 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 +1558,21 @@ 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 +1586,12 @@ 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 +1601,7 @@ 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 +1611,7 @@ 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 +1642,12 @@ 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 +1751,15 @@ 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 +1769,7 @@ 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 +1786,7 @@ 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 +2032,8 @@ 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 +2050,12 @@ 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 +2081,7 @@ void WholeProjectRefactorer::GlobalObjectOrGroupRenamed(
     if (layout.GetObjects().HasObjectNamed(oldName))
       continue;
 
-    ObjectOrGroupRenamedInScene(project, layout, oldName, newName,
+    ObjectOrGroupRenamedInScene(project, layout, project.GetObjects(), oldName, newName,
                                  isObjectGroup);
   }
 }
@@ -2090,4 +2213,23 @@ 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 +176,21 @@ 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 project **before** an events function parameter
    * is moved.
@@ -324,6 +342,16 @@ 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 +365,16 @@ 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 +544,7 @@ 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 +643,18 @@ 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 +665,12 @@ 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 +711,35 @@ 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/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

@@ -26,7 +26,7 @@ void CustomConfigurationHelper::InitializeContent(
 
     if (propertyType == "String" || propertyType == "Choice" ||
         propertyType == "Color" || propertyType == "Behavior" ||
-        propertyType == "Resource") {
+        propertyType == "Resource" || propertyType == "LeaderboardId") {
       element.SetStringValue(property->GetValue());
     } else if (propertyType == "Number") {
       element.SetDoubleValue(property->GetValue().To<double>());
@@ -39,21 +39,21 @@ void CustomConfigurationHelper::InitializeContent(
 std::map<gd::String, gd::PropertyDescriptor> CustomConfigurationHelper::GetProperties(
     const gd::PropertiesContainer &properties,
     const gd::SerializerElement &configurationContent) {
-  auto behaviorProperties = std::map<gd::String, gd::PropertyDescriptor>();
+  auto objectProperties = std::map<gd::String, gd::PropertyDescriptor>();
 
   for (auto &property : properties.GetInternalVector()) {
     const auto &propertyName = property->GetName();
     const auto &propertyType = property->GetType();
 
     // Copy the property
-    behaviorProperties[propertyName] = *property;
+    objectProperties[propertyName] = *property;
 
-    auto &newProperty = behaviorProperties[propertyName];
+    auto &newProperty = objectProperties[propertyName];
 
     if (configurationContent.HasChild(propertyName)) {
       if (propertyType == "String" || propertyType == "Choice" ||
           propertyType == "Color" || propertyType == "Behavior" ||
-          propertyType == "Resource") {
+          propertyType == "Resource" || propertyType == "LeaderboardId") {
         newProperty.SetValue(
             configurationContent.GetChild(propertyName).GetStringValue());
       } else if (propertyType == "Number") {
@@ -71,7 +71,7 @@ std::map<gd::String, gd::PropertyDescriptor> CustomConfigurationHelper::GetPrope
     }
   }
 
-  return behaviorProperties;
+  return objectProperties;
 }
 
 bool CustomConfigurationHelper::UpdateProperty(
@@ -89,7 +89,7 @@ bool CustomConfigurationHelper::UpdateProperty(
 
   if (propertyType == "String" || propertyType == "Choice" ||
       propertyType == "Color" || propertyType == "Behavior" ||
-      propertyType == "Resource") {
+      propertyType == "Resource" || propertyType == "LeaderboardId") {
     element.SetStringValue(newValue);
   } else if (propertyType == "Number") {
     element.SetDoubleValue(newValue.To<double>());

Core/GDCore/Project/CustomObjectConfiguration.cpp

@@ -21,6 +21,9 @@ void CustomObjectConfiguration::Init(const gd::CustomObjectConfiguration& object
   project = objectConfiguration.project;
   objectContent = objectConfiguration.objectContent;
   animations = objectConfiguration.animations;
+  isMarkedAsOverridingEventsBasedObjectChildrenConfiguration =
+      objectConfiguration
+          .isMarkedAsOverridingEventsBasedObjectChildrenConfiguration;
 
   // There is no default copy for a map of unique_ptr like childObjectConfigurations.
   childObjectConfigurations.clear();
@@ -42,6 +45,26 @@ const gd::EventsBasedObject* CustomObjectConfiguration::GetEventsBasedObject() c
   return &project->GetEventsBasedObject(GetType());
 }
 
+bool CustomObjectConfiguration::
+    IsForcedToOverrideEventsBasedObjectChildrenConfiguration() const {
+  const auto *eventsBasedObject = GetEventsBasedObject();
+  if (!eventsBasedObject) {
+    // True is safer because nothing will be lost when serializing.
+    return true;
+  }
+  return eventsBasedObject->GetInitialInstances().GetInstancesCount() == 0;
+}
+
+bool CustomObjectConfiguration::
+    IsOverridingEventsBasedObjectChildrenConfiguration() const {
+  return isMarkedAsOverridingEventsBasedObjectChildrenConfiguration ||
+         IsForcedToOverrideEventsBasedObjectChildrenConfiguration();
+}
+
+void CustomObjectConfiguration::ClearChildrenConfiguration() {
+  childObjectConfigurations.clear();
+}
+
 gd::ObjectConfiguration &CustomObjectConfiguration::GetChildObjectConfiguration(const gd::String &objectName) {
   const auto *eventsBasedObject = GetEventsBasedObject();
   if (!eventsBasedObject) {
@@ -49,12 +72,24 @@ 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;
   }
 
   auto &childObject = eventsBasedObject->GetObjects().GetObject(objectName);
+
+  if (!IsOverridingEventsBasedObjectChildrenConfiguration()) {
+    // It should be fine because the editor doesn't allow to edit values when
+    // the default values from the events-based object is used.
+    //
+    // Resource refactor operations may modify it but they will do the same
+    // thing on the custom object as on the event-based object children so it
+    // shouldn't have any side effect.
+    return const_cast<gd::ObjectConfiguration &>(
+        childObject.GetConfiguration());
+  }
+
   auto configurationPosition = childObjectConfigurations.find(objectName);
   if (configurationPosition == childObjectConfigurations.end()) {
     childObjectConfigurations.insert(std::make_pair(
@@ -67,7 +102,7 @@ gd::ObjectConfiguration &CustomObjectConfiguration::GetChildObjectConfiguration(
     auto &configuration = pair.second;
     return *configuration;
   }
- }
+}
 
 std::map<gd::String, gd::PropertyDescriptor> CustomObjectConfiguration::GetProperties() const {
     auto objectProperties = std::map<gd::String, gd::PropertyDescriptor>();
@@ -123,31 +158,21 @@ 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);
   }
 
-  auto &childrenContentElement = element.AddChild("childrenContent");
-  for (auto &pair : childObjectConfigurations) {
-    auto &childName = pair.first;
-    auto &childConfiguration = pair.second;
-    auto &childElement = childrenContentElement.AddChild(childName);
-    childConfiguration->SerializeTo(childElement);
-  }
-
-  const auto *eventsBasedObject = GetEventsBasedObject();
-  if (eventsBasedObject) {
-    eventsBasedObject->GetInitialInstances().SerializeTo(
-        element.AddChild("instances"));
-    eventsBasedObject->GetLayers().SerializeLayersTo(
-        element.AddChild("layers"));
-    element.SetIntAttribute("areaMinX", eventsBasedObject->GetAreaMinX());
-    element.SetIntAttribute("areaMinY", eventsBasedObject->GetAreaMinY());
-    element.SetIntAttribute("areaMinZ", eventsBasedObject->GetAreaMinZ());
-    element.SetIntAttribute("areaMaxX", eventsBasedObject->GetAreaMaxX());
-    element.SetIntAttribute("areaMaxY", eventsBasedObject->GetAreaMaxY());
-    element.SetIntAttribute("areaMaxZ", eventsBasedObject->GetAreaMaxZ());
+  if (IsOverridingEventsBasedObjectChildrenConfiguration()) {
+    auto &childrenContentElement = element.AddChild("childrenContent");
+    for (auto &pair : childObjectConfigurations) {
+      auto &childName = pair.first;
+      auto &childConfiguration = pair.second;
+      auto &childElement = childrenContentElement.AddChild(childName);
+      childConfiguration->SerializeTo(childElement);
+    }
   }
 }
 void CustomObjectConfiguration::DoUnserializeFrom(Project& project,
@@ -159,12 +184,16 @@ void CustomObjectConfiguration::DoUnserializeFrom(Project& project,
     animations.UnserializeFrom(animatableElement);
   }
 
-  auto &childrenContentElement = element.GetChild("childrenContent");
-  for (auto &pair : childrenContentElement.GetAllChildren()) {
-    auto &childName = pair.first;
-    auto &childElement = pair.second;
-    auto &childConfiguration = GetChildObjectConfiguration(childName);
-    childConfiguration.UnserializeFrom(project, *childElement);
+  isMarkedAsOverridingEventsBasedObjectChildrenConfiguration =
+      element.HasChild("childrenContent");
+  if (isMarkedAsOverridingEventsBasedObjectChildrenConfiguration) {
+    auto &childrenContentElement = element.GetChild("childrenContent");
+    for (auto &pair : childrenContentElement.GetAllChildren()) {
+      auto &childName = pair.first;
+      auto &childElement = pair.second;
+      auto &childConfiguration = GetChildObjectConfiguration(childName);
+      childConfiguration.UnserializeFrom(project, *childElement);
+    }
   }
 }
 
@@ -175,8 +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();
@@ -245,3 +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"
@@ -30,7 +31,7 @@ namespace gd {
 class CustomObjectConfiguration : public gd::ObjectConfiguration {
  public:
   CustomObjectConfiguration(const Project& project_, const String& type_)
-      : project(&project_) {
+      : project(&project_), isMarkedAsOverridingEventsBasedObjectChildrenConfiguration(false) {
     SetType(type_);
   }
   std::unique_ptr<gd::ObjectConfiguration> Clone() const override;
@@ -65,7 +66,22 @@ class CustomObjectConfiguration : public gd::ObjectConfiguration {
 
   void ExposeResources(gd::ArbitraryResourceWorker& worker) override;
 
-  gd::ObjectConfiguration &GetChildObjectConfiguration(const gd::String& objectName);
+  bool IsForcedToOverrideEventsBasedObjectChildrenConfiguration() const;
+
+  bool IsMarkedAsOverridingEventsBasedObjectChildrenConfiguration() const {
+    return isMarkedAsOverridingEventsBasedObjectChildrenConfiguration;
+  }
+
+  void SetMarkedAsOverridingEventsBasedObjectChildrenConfiguration(
+      bool isOverridingEventsBasedObjectChildrenConfiguration_) {
+    isMarkedAsOverridingEventsBasedObjectChildrenConfiguration =
+        isOverridingEventsBasedObjectChildrenConfiguration_;
+  }
+
+  void ClearChildrenConfiguration();
+
+  gd::ObjectConfiguration &
+  GetChildObjectConfiguration(const gd::String &objectName);
 
   std::size_t GetAnimationsCount() const override;
 
@@ -83,6 +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;
@@ -90,10 +138,15 @@ protected:
  private:
   const gd::EventsBasedObject* GetEventsBasedObject() const;
 
-  const Project* project; ///< The project is used to get the
-                          ///< EventBasedObject from the fullType.
+  bool IsOverridingEventsBasedObjectChildrenConfiguration() const;
+
+  const Project* project = nullptr; ///< The project is used to get the
+                                    ///< EventBasedObject from the fullType.
   gd::SerializerElement objectContent;
-  std::map<gd::String, std::unique_ptr<gd::ObjectConfiguration>> childObjectConfigurations;
+  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/EventsBasedObject.cpp

@@ -16,12 +16,15 @@ EventsBasedObject::EventsBasedObject()
     isRenderedIn3D(false),
     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() {}
@@ -37,6 +40,10 @@ void EventsBasedObject::SerializeTo(SerializerElement& element) const {
   if (isTextContainer) {
     element.SetBoolAttribute("isTextContainer", true);
   }
+  if (isInnerAreaFollowingParentSize) {
+    element.SetBoolAttribute("isInnerAreaFollowingParentSize", true);
+  }
+  element.SetBoolAttribute("isUsingLegacyInstancesRenderer", isUsingLegacyInstancesRenderer);
   element.SetIntAttribute("areaMinX", areaMinX);
   element.SetIntAttribute("areaMinY", areaMinY);
   element.SetIntAttribute("areaMinZ", areaMinZ);
@@ -59,6 +66,8 @@ void EventsBasedObject::UnserializeFrom(gd::Project& project,
   isRenderedIn3D = element.GetBoolAttribute("is3D", false);
   isAnimatable = element.GetBoolAttribute("isAnimatable", false);
   isTextContainer = element.GetBoolAttribute("isTextContainer", false);
+  isInnerAreaFollowingParentSize =
+      element.GetBoolAttribute("isInnerAreaFollowingParentSize", false);
   areaMinX = element.GetIntAttribute("areaMinX", 0);
   areaMinY = element.GetIntAttribute("areaMinY", 0);
   areaMinZ = element.GetIntAttribute("areaMinZ", 0);
@@ -82,6 +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

@@ -101,11 +101,53 @@ class GD_CORE_API EventsBasedObject: public AbstractEventsBasedEntity {
   /**
    * \brief Declare a TextContainer capability.
    */
-  EventsBasedObject& MarkAsTextContainer(bool isTextContainer_) {
+  EventsBasedObject &MarkAsTextContainer(bool isTextContainer_) {
     isTextContainer = isTextContainer_;
     return *this;
   }
 
+  /**
+   * \brief Declare that the parent scale will always be 1 and children will
+   * adapt there size. This is removing the ScalableCapability.
+   */
+  EventsBasedObject &
+  MarkAsInnerAreaFollowingParentSize(bool isInnerAreaExpandingWithParent_) {
+    isInnerAreaFollowingParentSize = isInnerAreaExpandingWithParent_;
+    return *this;
+  }
+
+  /**
+   * \brief Return true if objects handle size changes on their own and
+   * don't have the ScalableCapability.
+   *
+   * When the parent dimensions change:
+   * - if `false`, the object is stretch proportionally while children local
+   *   positions stay the same.
+   * - if `true`, the children local positions need to be adapted by events
+   *   to follow their parent size.
+   */
+  bool IsInnerAreaFollowingParentSize() const {
+    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.
    */
@@ -279,6 +321,8 @@ class GD_CORE_API EventsBasedObject: public AbstractEventsBasedEntity {
   bool isRenderedIn3D;
   bool isAnimatable;
   bool isTextContainer;
+  bool isInnerAreaFollowingParentSize;
+  bool isUsingLegacyInstancesRenderer;
   gd::InitialInstancesContainer initialInstances;
   gd::LayersContainer layers;
   gd::ObjectsContainer objectsContainer;

Core/GDCore/Project/EventsFunctionsExtension.cpp

@@ -10,6 +10,7 @@
 #include "EventsFunction.h"
 #include "GDCore/Serialization/SerializerElement.h"
 #include "GDCore/Tools/MakeUnique.h"
+#include "GDCore/Extensions/PlatformExtension.h"
 
 namespace gd {
 
@@ -98,8 +99,11 @@ void EventsFunctionsExtension::SerializeTo(SerializerElement& element) const {
 
 void EventsFunctionsExtension::UnserializeFrom(
     gd::Project& project, const SerializerElement& element) {
-      UnserializeExtensionDeclarationFrom(project, element);
-      UnserializeExtensionImplementationFrom(project, element);
+  // Unserialize first the "declaration" (everything but objects content)
+  // so that objects can be then unserialized in proper order (they can depend
+  // on each others)
+  UnserializeExtensionDeclarationFrom(project, element);
+  UnserializeExtensionImplementationFrom(project, element);
 }
 
 void EventsFunctionsExtension::UnserializeExtensionDeclarationFrom(
@@ -162,6 +166,7 @@ void EventsFunctionsExtension::UnserializeExtensionDeclarationFrom(
   // As event based objects can contains objects using CustomBehavior and/or
   // CustomObject, this allows them to reference EventBasedBehavior and
   // EventBasedObject respectively.
+  eventsBasedBehaviors.Clear();
   auto &behaviorsElement = element.GetChild("eventsBasedBehaviors");
   behaviorsElement.ConsiderAsArrayOf("eventsBasedBehavior");
   for (std::size_t i = 0; i < behaviorsElement.GetChildrenCount(); ++i) {
@@ -169,6 +174,7 @@ void EventsFunctionsExtension::UnserializeExtensionDeclarationFrom(
         behaviorsElement.GetChild(i).GetStringAttribute("name");
     eventsBasedBehaviors.InsertNew(behaviorName, eventsBasedBehaviors.GetCount());
   }
+  eventsBasedObjects.Clear();
   auto &objectsElement = element.GetChild("eventsBasedObjects");
   objectsElement.ConsiderAsArrayOf("eventsBasedObject");
   for (std::size_t i = 0; i < objectsElement.GetChildrenCount(); ++i) {
@@ -185,11 +191,93 @@ void EventsFunctionsExtension::UnserializeExtensionImplementationFrom(
   eventsBasedBehaviors.UnserializeElementsFrom(
       "eventsBasedBehavior", project, element.GetChild("eventsBasedBehaviors"));
 
-  // It's important to load the objects without erasing them first as each object
-  // might reference other objects, and so need to know if a custom object exists
-  // in the project or not.
-  eventsBasedObjects.ProgressivelyUnserializeElementsFrom(
-      "eventsBasedObject", project, element.GetChild("eventsBasedObjects"));
+  auto &eventsBasedObjectsElement = element.GetChild("eventsBasedObjects");
+  eventsBasedObjectsElement.ConsiderAsArrayOf("eventsBasedObject");
+  for (gd::String &eventsBasedObjectName :
+       GetUnserializingOrderEventsBasedObjectNames(eventsBasedObjectsElement)) {
+    size_t extensionIndex = eventsBasedObjects.GetPosition(
+        eventsBasedObjects.Get(eventsBasedObjectName));
+    const SerializerElement &eventsBasedObjectElement =
+        eventsBasedObjectsElement.GetChild(extensionIndex);
+
+    eventsBasedObjects.at(extensionIndex)
+        .UnserializeFrom(project, eventsBasedObjectElement);
+  }
+}
+
+std::vector<gd::String>
+EventsFunctionsExtension::GetUnserializingOrderEventsBasedObjectNames(
+    const gd::SerializerElement &eventsBasedObjectsElement) {
+
+  // Child-objects need the event-based objects they use to be loaded completely
+  // before they are unserialized.
+
+  // At the beginning, everything is yet to be loaded.
+  std::vector<gd::String> remainingEventsBasedObjectNames(
+      eventsBasedObjects.size());
+  for (std::size_t i = 0; i < eventsBasedObjects.size(); ++i) {
+    remainingEventsBasedObjectNames[i] = eventsBasedObjects.at(i).GetName();
+  }
+
+  // Helper allowing to find if an object depends on at least one other object from
+  // the extension that is not loaded yet.
+  auto &extensionName = name;
+  auto isDependentFromRemainingEventsBasedObjects =
+      [&remainingEventsBasedObjectNames,
+       &extensionName](const gd::SerializerElement &eventsBasedObjectElement) {
+        auto &objectsElement = eventsBasedObjectElement.GetChild("objects");
+        objectsElement.ConsiderAsArrayOf("object");
+
+        for (std::size_t objectIndex = 0;
+             objectIndex < objectsElement.GetChildrenCount(); ++objectIndex) {
+          const gd::String &objectType =
+              objectsElement.GetChild(objectIndex).GetStringAttribute("type");
+
+          gd::String usedExtensionName =
+              PlatformExtension::GetExtensionFromFullObjectType(objectType);
+          if (usedExtensionName != extensionName) {
+            // The object comes from another extension: the project is already responsible
+            // for loading extensions in the proper order.
+            continue;
+          }
+          gd::String eventsBasedObjectName =
+              gd::PlatformExtension::GetObjectNameFromFullObjectType(
+                  objectType);
+
+          if (std::find(remainingEventsBasedObjectNames.begin(),
+                        remainingEventsBasedObjectNames.end(),
+                        eventsBasedObjectName) !=
+              remainingEventsBasedObjectNames.end()) {
+            return true;
+          }
+        }
+        return false;
+      };
+
+  // Find the order of loading so that the objects are loaded when all the objects
+  // they depend on are already loaded.
+  std::vector<gd::String> loadOrderEventsBasedObjectNames;
+  bool foundAnyEventsBasedObject = true;
+  while (foundAnyEventsBasedObject) {
+    foundAnyEventsBasedObject = false;
+    for (std::size_t i = 0; i < remainingEventsBasedObjectNames.size(); ++i) {
+      auto eventsBasedObjectName = remainingEventsBasedObjectNames[i];
+      size_t extensionIndex = eventsBasedObjects.GetPosition(
+          eventsBasedObjects.Get(eventsBasedObjectName));
+      const SerializerElement &eventsBasedObjectElement =
+          eventsBasedObjectsElement.GetChild(extensionIndex);
+
+      if (!isDependentFromRemainingEventsBasedObjects(
+              eventsBasedObjectElement)) {
+        loadOrderEventsBasedObjectNames.push_back(eventsBasedObjectName);
+        remainingEventsBasedObjectNames.erase(
+            remainingEventsBasedObjectNames.begin() + i);
+        i--;
+        foundAnyEventsBasedObject = true;
+      }
+    }
+  }
+  return loadOrderEventsBasedObjectNames;
 }
 
 bool EventsFunctionsExtension::IsExtensionLifecycleEventsFunction(

Core/GDCore/Project/EventsFunctionsExtension.h

@@ -314,6 +314,9 @@ class GD_CORE_API EventsFunctionsExtension : public EventsFunctionsContainer {
     return dependency;
   }
 
+  std::vector<gd::String> GetUnserializingOrderEventsBasedObjectNames(
+    const gd::SerializerElement &eventsBasedObjectsElement);
+
   gd::String version;
   gd::String extensionNamespace;
   gd::String shortDescription;

Core/GDCore/Project/ExternalEvents.cpp

@@ -7,7 +7,7 @@
 
 namespace gd {
 
-ExternalEvents::ExternalEvents() : lastChangeTimeStamp(0) {
+ExternalEvents::ExternalEvents() {
   // ctor
 }
 
@@ -24,14 +24,12 @@ ExternalEvents& ExternalEvents::operator=(const ExternalEvents& rhs) {
 void ExternalEvents::Init(const ExternalEvents& externalEvents) {
   name = externalEvents.GetName();
   associatedScene = externalEvents.GetAssociatedLayout();
-  lastChangeTimeStamp = externalEvents.GetLastChangeTimeStamp();
   events = externalEvents.events;
 }
 
 void ExternalEvents::SerializeTo(SerializerElement& element) const {
   element.SetAttribute("name", name);
   element.SetAttribute("associatedLayout", associatedScene);
-  element.SetAttribute("lastChangeTimeStamp", (int)lastChangeTimeStamp);
   gd::EventsListSerialization::SerializeEventsTo(events,
                                                  element.AddChild("events"));
 }
@@ -41,8 +39,6 @@ void ExternalEvents::UnserializeFrom(gd::Project& project,
   name = element.GetStringAttribute("name", "", "Name");
   associatedScene =
       element.GetStringAttribute("associatedLayout", "", "AssociatedScene");
-  lastChangeTimeStamp =
-      element.GetIntAttribute("lastChangeTimeStamp", 0, "LastChangeTimeStamp");
   gd::EventsListSerialization::UnserializeEventsFrom(
       project, events, element.GetChild("events", 0, "Events"));
 }

Core/GDCore/Project/ExternalEvents.h

@@ -67,24 +67,6 @@ class GD_CORE_API ExternalEvents {
     associatedScene = name_;
   };
 
-  /**
-   * Get the latest time of the build.
-   * Used when the IDE found that the external events can be compiled separately
-   * from scene's events.
-   *
-   * \todo This is specific to GD C++ Platform
-   */
-  time_t GetLastChangeTimeStamp() const { return lastChangeTimeStamp; };
-
-  /**
-   * Change the latest time of the build of the external events.
-   *
-   * \todo This is specific to GD C++ Platform
-   */
-  void SetLastChangeTimeStamp(time_t newTimeStamp) {
-    lastChangeTimeStamp = newTimeStamp;
-  };
-
   /**
    * \brief Get the events.
    */
@@ -109,7 +91,6 @@ class GD_CORE_API ExternalEvents {
  private:
   gd::String name;
   gd::String associatedScene;
-  time_t lastChangeTimeStamp;  ///< Time of the last build
   gd::EventsList events;       ///< List of events
 
   /**
@@ -119,19 +100,6 @@ class GD_CORE_API ExternalEvents {
   void Init(const ExternalEvents& externalEvents);
 };
 
-/**
- * \brief Functor testing ExternalEvents' name
- */
-struct ExternalEventsHasName
-    : public std::binary_function<std::unique_ptr<gd::ExternalEvents>,
-                                  gd::String,
-                                  bool> {
-  bool operator()(const std::unique_ptr<gd::ExternalEvents>& externalEvents,
-                  gd::String name) const {
-    return externalEvents->GetName() == name;
-  }
-};
-
 }  // namespace gd
 
 #endif  // GDCORE_EXTERNALEVENTS_H

Core/GDCore/Project/ExternalLayout.h

@@ -96,19 +96,6 @@ class GD_CORE_API ExternalLayout {
   gd::String associatedLayout;
 };
 
-/**
- * \brief Functor testing ExternalLayout' name
- */
-struct ExternalLayoutHasName
-    : public std::binary_function<std::unique_ptr<gd::ExternalLayout>,
-                                  gd::String,
-                                  bool> {
-  bool operator()(const std::unique_ptr<gd::ExternalLayout>& externalLayout,
-                  gd::String name) const {
-    return externalLayout->GetName() == name;
-  }
-};
-
 }  // namespace gd
 
 #endif  // GDCORE_EXTERNALLAYOUT_H

Core/GDCore/Project/InitialInstance.cpp

@@ -27,7 +27,11 @@ InitialInstance::InitialInstance()
       rotationX(0),
       rotationY(0),
       zOrder(0),
+      opacity(255),
       layer(""),
+      flippedX(false),
+      flippedY(false),
+      flippedZ(false),
       customSize(false),
       customDepth(false),
       width(0),
@@ -57,7 +61,11 @@ void InitialInstance::UnserializeFrom(const SerializerElement& element) {
     SetHasCustomDepth(false);
   }
   SetZOrder(element.GetIntAttribute("zOrder", 0, "plan"));
+  SetOpacity(element.GetIntAttribute("opacity", 255));
   SetLayer(element.GetStringAttribute("layer"));
+  SetFlippedX(element.GetBoolAttribute("flippedX", false));
+  SetFlippedY(element.GetBoolAttribute("flippedY", false));
+  SetFlippedZ(element.GetBoolAttribute("flippedZ", false));
   SetLocked(element.GetBoolAttribute("locked", false));
   SetSealed(element.GetBoolAttribute("sealed", false));
   SetShouldKeepRatio(element.GetBoolAttribute("keepRatio", false));
@@ -113,6 +121,10 @@ void InitialInstance::SerializeTo(SerializerElement& element) const {
   element.SetAttribute("y", GetY());
   if (GetZ() != 0) element.SetAttribute("z", GetZ());
   element.SetAttribute("zOrder", GetZOrder());
+  if (GetOpacity() != 255) element.SetAttribute("opacity", GetOpacity());
+  if (IsFlippedX()) element.SetAttribute("flippedX", IsFlippedX());
+  if (IsFlippedY()) element.SetAttribute("flippedY", IsFlippedY());
+  if (IsFlippedZ()) element.SetAttribute("flippedZ", IsFlippedZ());
   element.SetAttribute("layer", GetLayer());
   element.SetAttribute("angle", GetAngle());
   if (GetRotationX() != 0) element.SetAttribute("rotationX", GetRotationX());
@@ -155,8 +167,8 @@ InitialInstance& InitialInstance::ResetPersistentUuid() {
 
 std::map<gd::String, gd::PropertyDescriptor>
 InitialInstance::GetCustomProperties(
-    gd::ObjectsContainer &globalObjectsContainer,
-    gd::ObjectsContainer &objectsContainer) {
+    gd::ObjectsContainer& globalObjectsContainer,
+    gd::ObjectsContainer& objectsContainer) {
   // Find an object
   if (objectsContainer.HasObjectNamed(GetObjectName()))
     return objectsContainer.GetObject(GetObjectName())
@@ -172,9 +184,10 @@ InitialInstance::GetCustomProperties(
 }
 
 bool InitialInstance::UpdateCustomProperty(
-    const gd::String &name, const gd::String &value,
-    gd::ObjectsContainer &globalObjectsContainer,
-    gd::ObjectsContainer &objectsContainer) {
+    const gd::String& name,
+    const gd::String& value,
+    gd::ObjectsContainer& globalObjectsContainer,
+    gd::ObjectsContainer& objectsContainer) {
   if (objectsContainer.HasObjectNamed(GetObjectName()))
     return objectsContainer.GetObject(GetObjectName())
         .GetConfiguration()

Core/GDCore/Project/InitialInstance.h

@@ -29,7 +29,7 @@ class GD_CORE_API InitialInstance {
    * \brief Create an initial instance pointing to no object, at position (0,0).
    */
   InitialInstance();
-  virtual ~InitialInstance(){};
+  virtual ~InitialInstance() {};
 
   /**
    * Must return a pointer to a copy of the object. A such method is needed to
@@ -123,6 +123,46 @@ class GD_CORE_API InitialInstance {
    */
   void SetZOrder(int zOrder_) { zOrder = zOrder_; }
 
+  /**
+   * \brief Get Opacity.
+   */
+  int GetOpacity() const { return opacity; }
+
+  /**
+   * \brief Set the opacity of the instance.
+   */
+  void SetOpacity(int opacity_) { opacity = opacity_; }
+
+  /**
+   * \brief Return true if the instance is flipped on X axis.
+   */
+  bool IsFlippedX() const { return flippedX; }
+
+  /**
+   * \brief Set whether the instance is flipped on X axis.
+   */
+  void SetFlippedX(bool flippedX_) { flippedX = flippedX_; }
+
+  /**
+   * \brief Return true if the instance is flipped on Y axis.
+   */
+  bool IsFlippedY() const { return flippedY; }
+
+  /**
+   * \brief Set whether the instance is flipped on Y axis.
+   */
+  void SetFlippedY(bool flippedY_) { flippedY = flippedY_; }
+
+  /**
+   * \brief Return true if the instance is flipped on Z axis.
+   */
+  bool IsFlippedZ() const { return flippedZ; }
+
+  /**
+   * \brief Set whether the instance is flipped on Z axis.
+   */
+  void SetFlippedZ(bool flippedZ_) { flippedZ = flippedZ_; }
+
   /**
    * \brief Get the layer the instance belongs to.
    */
@@ -134,8 +174,9 @@ class GD_CORE_API InitialInstance {
   void SetLayer(const gd::String& layer_) { layer = layer_; }
 
   /**
-   * \brief Return true if the instance has a width/height which is different from its
-   * object default width/height. This is independent from `HasCustomDepth`.
+   * \brief Return true if the instance has a width/height which is different
+   * from its object default width/height. This is independent from
+   * `HasCustomDepth`.
    *
    * \see gd::Object
    */
@@ -150,15 +191,13 @@ class GD_CORE_API InitialInstance {
   bool HasCustomDepth() const { return customDepth; }
 
   /**
-   * \brief Set whether the instance has a width/height which is different from its
-   * object default width/height or not.
-   * This is independent from `SetHasCustomDepth`.
+   * \brief Set whether the instance has a width/height which is different from
+   * its object default width/height or not. This is independent from
+   * `SetHasCustomDepth`.
    *
    * \see gd::Object
    */
-  void SetHasCustomSize(bool hasCustomSize_) {
-    customSize = hasCustomSize_;
-  }
+  void SetHasCustomSize(bool hasCustomSize_) { customSize = hasCustomSize_; }
 
   /**
    * \brief Set whether the instance has a depth which is different from its
@@ -264,18 +303,19 @@ class GD_CORE_API InitialInstance {
    * \note Common properties ( name, position... ) do not need to be
    * inserted in this map
    */
-  std::map<gd::String, gd::PropertyDescriptor>
-  GetCustomProperties(gd::ObjectsContainer &globalObjectsContainer,
-                      gd::ObjectsContainer &objectsContainer);
+  std::map<gd::String, gd::PropertyDescriptor> GetCustomProperties(
+      gd::ObjectsContainer& globalObjectsContainer,
+      gd::ObjectsContainer& objectsContainer);
 
   /**
    * \brief Update the property called \a name with the new \a value.
    *
    * \return false if the property could not be updated.
    */
-  bool UpdateCustomProperty(const gd::String &name, const gd::String &value,
-                            gd::ObjectsContainer &globalObjectsContainer,
-                            gd::ObjectsContainer &objectsContainer);
+  bool UpdateCustomProperty(const gd::String& name,
+                            const gd::String& value,
+                            gd::ObjectsContainer& globalObjectsContainer,
+                            gd::ObjectsContainer& objectsContainer);
 
   /**
    * \brief Get the value of a double property stored in the instance.
@@ -343,6 +383,10 @@ class GD_CORE_API InitialInstance {
   double rotationX;       ///< Instance angle on X axis (for a 3D object)
   double rotationY;       ///< Instance angle on Y axis (for a 3D object)
   int zOrder;             ///< Instance Z order (for a 2D object)
+  int opacity;            ///< Instance opacity
+  bool flippedX;          ///< True if the instance is flipped on X axis
+  bool flippedY;          ///< True if the instance is flipped on Y axis
+  bool flippedZ;          ///< True if the instance is flipped on Z axis
   gd::String layer;       ///< Instance layer
   bool customSize;        ///< True if object has a custom width and height
   bool customDepth;       ///< True if object has a custom depth
@@ -352,13 +396,13 @@ class GD_CORE_API InitialInstance {
   gd::VariablesContainer initialVariables;  ///< Instance specific variables
   bool locked;                              ///< True if the instance is locked
   bool sealed;                              ///< True if the instance is sealed
-  bool keepRatio;                           ///< True if the instance's dimensions
-                                            ///  should keep the same ratio.
+  bool keepRatio;                     ///< True if the instance's dimensions
+                                      ///  should keep the same ratio.
   mutable gd::String persistentUuid;  ///< A persistent random version 4 UUID,
                                       ///  useful for hot reloading.
 
-  static gd::String*
-      badStringPropertyValue;  ///< Empty string returned by GetRawStringProperty
+  static gd::String* badStringPropertyValue;  ///< Empty string returned by
+                                              ///< GetRawStringProperty
 };
 
 }  // namespace gd

Core/GDCore/Project/InitialInstancesContainer.cpp

@@ -163,6 +163,20 @@ bool InitialInstancesContainer::HasInstancesOfObject(
                      });
 }
 
+bool InitialInstancesContainer::IsInstancesCountOfObjectGreaterThan(
+    const gd::String &objectName, const std::size_t minInstanceCount) const {
+  std::size_t count = 0;
+  for (const gd::InitialInstance &instance : initialInstances) {
+    if (instance.GetObjectName() == objectName) {
+      count++;
+      if (count > minInstanceCount) {
+        return true;
+      }
+    }
+  }
+  return false;
+}
+
 void InitialInstancesContainer::Create(
     const InitialInstancesContainer& source) {
   try {

Core/GDCore/Project/InitialInstancesContainer.h

@@ -153,6 +153,13 @@ class GD_CORE_API InitialInstancesContainer {
    */
   bool HasInstancesOfObject(const gd::String &objectName) const;
 
+  /**
+   * \brief Return true if there is at least N instances of the given object.
+   */
+  bool
+  IsInstancesCountOfObjectGreaterThan(const gd::String &objectName,
+                                      const std::size_t minInstanceCount) const;
+
   /**
    * \brief Remove all instances
    */

Core/GDCore/Project/Layer.cpp

@@ -15,6 +15,7 @@ Camera Layer::badCamera;
 
 Layer::Layer()
     : renderingType(""),
+      defaultCameraBehavior("top-left-anchored-if-never-moved"),
       isVisible(true),
       isLocked(false),
       isLightingLayer(false),
@@ -40,6 +41,9 @@ void Layer::SerializeTo(SerializerElement& element) const {
   element.SetAttribute("name", GetName());
   element.SetAttribute("renderingType", GetRenderingType());
   element.SetAttribute("cameraType", GetCameraType());
+  if (GetDefaultCameraBehavior() != "top-left-anchored-if-never-moved") {
+    element.SetAttribute("defaultCameraBehavior", GetDefaultCameraBehavior());
+  }
   element.SetAttribute("visibility", GetVisibility());
   element.SetAttribute("isLocked", IsLocked());
   element.SetAttribute("isLightingLayer", IsLightingLayer());
@@ -80,6 +84,7 @@ void Layer::UnserializeFrom(const SerializerElement& element) {
   SetName(element.GetStringAttribute("name", "", "Name"));
   SetRenderingType(element.GetStringAttribute("renderingType", ""));
   SetCameraType(element.GetStringAttribute("cameraType", "perspective"));
+  SetDefaultCameraBehavior(element.GetStringAttribute("defaultCameraBehavior", "top-left-anchored-if-never-moved"));
   SetVisibility(element.GetBoolAttribute("visibility", true, "Visibility"));
   SetLocked(element.GetBoolAttribute("isLocked", false));
   SetLightingLayer(element.GetBoolAttribute("isLightingLayer", false));

Core/GDCore/Project/Layer.h

@@ -109,6 +109,12 @@ class GD_CORE_API Layer {
     renderingType = renderingType_;
   }
 
+  const gd::String& GetDefaultCameraBehavior() const { return defaultCameraBehavior; }
+
+  void SetDefaultCameraBehavior(const gd::String& defaultCameraBehavior_) {
+    defaultCameraBehavior = defaultCameraBehavior_;
+  }
+
   const gd::String& GetCameraType() const { return cameraType; }
 
   void SetCameraType(const gd::String& cameraType_) {
@@ -275,6 +281,7 @@ class GD_CORE_API Layer {
   gd::String name;           ///< The name of the layer
   gd::String renderingType;  ///< The rendering type: "" (empty), "2d", "3d" or
                              ///< "2d+3d".
+  gd::String defaultCameraBehavior;
   gd::String cameraType;
   bool isVisible;            ///< True if the layer is visible
   bool isLocked;             ///< True if the layer is locked

Core/GDCore/Project/Layout.cpp

@@ -24,10 +24,11 @@
 #include "GDCore/Project/ObjectGroup.h"
 #include "GDCore/Project/ObjectGroupsContainer.h"
 #include "GDCore/Project/Project.h"
+#include "GDCore/Project/QuickCustomization.h"
 #include "GDCore/Serialization/SerializerElement.h"
 #include "GDCore/String.h"
-#include "GDCore/Tools/PolymorphicClone.h"
 #include "GDCore/Tools/Log.h"
+#include "GDCore/Tools/PolymorphicClone.h"
 
 using namespace std;
 
@@ -35,7 +36,10 @@ namespace gd {
 
 gd::BehaviorsSharedData Layout::badBehaviorSharedData("", "");
 
-Layout::Layout(const Layout& other) { Init(other); }
+Layout::Layout(const Layout &other)
+    : objectsContainer(gd::ObjectsContainer::SourceType::Scene) {
+  Init(other);
+}
 
 Layout& Layout::operator=(const Layout& other) {
   if (this != &other) Init(other);
@@ -43,7 +47,7 @@ Layout& Layout::operator=(const Layout& other) {
   return *this;
 }
 
-Layout::~Layout(){};
+Layout::~Layout() {};
 
 Layout::Layout()
     : backgroundColorR(209),
@@ -52,9 +56,8 @@ Layout::Layout()
       stopSoundsOnStartup(true),
       standardSortMethod(true),
       disableInputWhenNotFocused(true),
-      variables(gd::VariablesContainer::SourceType::Scene)
-{
-}
+      variables(gd::VariablesContainer::SourceType::Scene),
+      objectsContainer(gd::ObjectsContainer::SourceType::Scene) {}
 
 void Layout::SetName(const gd::String& name_) {
   name = name_;
@@ -102,7 +105,9 @@ const gd::Layer& Layout::GetLayer(const gd::String& name) const {
   return layers.GetLayer(name);
 }
 
-gd::Layer& Layout::GetLayer(std::size_t index) { return layers.GetLayer(index); }
+gd::Layer& Layout::GetLayer(std::size_t index) {
+  return layers.GetLayer(index);
+}
 
 const gd::Layer& Layout::GetLayer(std::size_t index) const {
   return layers.GetLayer(index);
@@ -125,9 +130,7 @@ void Layout::InsertLayer(const gd::Layer& layer, std::size_t position) {
   layers.InsertLayer(layer, position);
 }
 
-void Layout::RemoveLayer(const gd::String& name) {
-  layers.RemoveLayer(name);
-}
+void Layout::RemoveLayer(const gd::String& name) { layers.RemoveLayer(name); }
 
 void Layout::SwapLayers(std::size_t firstLayerIndex,
                         std::size_t secondLayerIndex) {
@@ -153,7 +156,7 @@ void Layout::UpdateBehaviorsSharedData(gd::Project& project) {
       allBehaviorsNames.push_back(behavior.GetName());
     }
   }
-  auto &globalObjects = project.GetObjects();
+  auto& globalObjects = project.GetObjects();
   for (std::size_t i = 0; i < globalObjects.GetObjectsCount(); ++i) {
     std::vector<gd::String> objectBehaviors =
         globalObjects.GetObject(i).GetAllBehaviorNames();
@@ -173,7 +176,8 @@ void Layout::UpdateBehaviorsSharedData(gd::Project& project) {
 
     if (behaviorsSharedData.find(name) != behaviorsSharedData.end()) continue;
 
-    auto sharedData = CreateBehaviorsSharedData(project, name, allBehaviorsTypes[i]);
+    auto sharedData =
+        CreateBehaviorsSharedData(project, name, allBehaviorsTypes[i]);
     if (sharedData) {
       behaviorsSharedData[name] = std::move(sharedData);
     }
@@ -196,37 +200,39 @@ void Layout::UpdateBehaviorsSharedData(gd::Project& project) {
 }
 
 std::unique_ptr<gd::BehaviorsSharedData> Layout::CreateBehaviorsSharedData(
-        gd::Project& project, const gd::String& name, const gd::String& behaviorsType) {
-    if (project.HasEventsBasedBehavior(behaviorsType)) {
-      auto sharedData =
-          gd::make_unique<gd::CustomBehaviorsSharedData>(name, project, behaviorsType);
-      sharedData->InitializeContent();
-      return std::move(sharedData);
-    }
-    const gd::BehaviorMetadata& behaviorMetadata =
-        gd::MetadataProvider::GetBehaviorMetadata(
-            project.GetCurrentPlatform(),
-            behaviorsType);
-    if (gd::MetadataProvider::IsBadBehaviorMetadata(behaviorMetadata)) {
-      gd::LogWarning("Tried to create a behavior shared data with an unknown type: " +
-                     behaviorsType + " on object " + GetName() + "!");
+    gd::Project& project,
+    const gd::String& name,
+    const gd::String& behaviorsType) {
+  if (project.HasEventsBasedBehavior(behaviorsType)) {
+    auto sharedData = gd::make_unique<gd::CustomBehaviorsSharedData>(
+        name, project, behaviorsType);
+    sharedData->InitializeContent();
+    return std::move(sharedData);
+  }
+  const gd::BehaviorMetadata& behaviorMetadata =
+      gd::MetadataProvider::GetBehaviorMetadata(project.GetCurrentPlatform(),
+                                                behaviorsType);
+  if (gd::MetadataProvider::IsBadBehaviorMetadata(behaviorMetadata)) {
+    gd::LogWarning(
+        "Tried to create a behavior shared data with an unknown type: " +
+        behaviorsType + " on object " + GetName() + "!");
     // It's probably an events-based behavior that was removed.
     // Create a custom behavior shared data to preserve the properties values.
-      auto sharedData =
-          gd::make_unique<gd::CustomBehaviorsSharedData>(name, project, behaviorsType);
-      sharedData->InitializeContent();
-      return std::move(sharedData);
-    }
-
-    gd::BehaviorsSharedData* behaviorsSharedDataBluePrint =
-        behaviorMetadata.GetSharedDataInstance();
-    if (!behaviorsSharedDataBluePrint) return nullptr;
-
-    auto sharedData = behaviorsSharedDataBluePrint->Clone();
-    sharedData->SetName(name);
-    sharedData->SetTypeName(behaviorsType);
+    auto sharedData = gd::make_unique<gd::CustomBehaviorsSharedData>(
+        name, project, behaviorsType);
     sharedData->InitializeContent();
-    return std::unique_ptr<gd::BehaviorsSharedData>(sharedData);
+    return std::move(sharedData);
+  }
+
+  gd::BehaviorsSharedData* behaviorsSharedDataBluePrint =
+      behaviorMetadata.GetSharedDataInstance();
+  if (!behaviorsSharedDataBluePrint) return nullptr;
+
+  auto sharedData = behaviorsSharedDataBluePrint->Clone();
+  sharedData->SetName(name);
+  sharedData->SetTypeName(behaviorsType);
+  sharedData->InitializeContent();
+  return std::unique_ptr<gd::BehaviorsSharedData>(sharedData);
 }
 
 void Layout::SerializeTo(SerializerElement& element) const {
@@ -243,11 +249,13 @@ void Layout::SerializeTo(SerializerElement& element) const {
 
   editorSettings.SerializeTo(element.AddChild("uiSettings"));
 
-  objectsContainer.GetObjectGroups().SerializeTo(element.AddChild("objectsGroups"));
+  objectsContainer.GetObjectGroups().SerializeTo(
+      element.AddChild("objectsGroups"));
   GetVariables().SerializeTo(element.AddChild("variables"));
   GetInitialInstances().SerializeTo(element.AddChild("instances"));
   objectsContainer.SerializeObjectsTo(element.AddChild("objects"));
-  objectsContainer.SerializeFoldersTo(element.AddChild("objectsFolderStructure"));
+  objectsContainer.SerializeFoldersTo(
+      element.AddChild("objectsFolderStructure"));
   gd::EventsListSerialization::SerializeEventsTo(events,
                                                  element.AddChild("events"));
 
@@ -257,15 +265,33 @@ void Layout::SerializeTo(SerializerElement& element) const {
       element.AddChild("behaviorsSharedData");
   behaviorDatasElement.ConsiderAsArrayOf("behaviorSharedData");
   for (const auto& it : behaviorsSharedData) {
+    const gd::BehaviorsSharedData& sharedData = *it.second;
     SerializerElement& dataElement =
         behaviorDatasElement.AddChild("behaviorSharedData");
 
-    it.second->SerializeTo(dataElement);
+    sharedData.SerializeTo(dataElement);
     dataElement.RemoveChild("type");  // The content can contain type or name
                                       // properties, remove them.
     dataElement.RemoveChild("name");
-    dataElement.SetAttribute("type", it.second->GetTypeName());
-    dataElement.SetAttribute("name", it.second->GetName());
+    dataElement.SetAttribute("type", sharedData.GetTypeName());
+    dataElement.SetAttribute("name", sharedData.GetName());
+
+    // Handle Quick Customization info.
+    dataElement.RemoveChild("propertiesQuickCustomizationVisibilities");
+    const QuickCustomizationVisibilitiesContainer&
+        propertiesQuickCustomizationVisibilities =
+            sharedData.GetPropertiesQuickCustomizationVisibilities();
+    if (!propertiesQuickCustomizationVisibilities.IsEmpty()) {
+      propertiesQuickCustomizationVisibilities.SerializeTo(
+          dataElement.AddChild("propertiesQuickCustomizationVisibilities"));
+    }
+    const QuickCustomization::Visibility visibility =
+        sharedData.GetQuickCustomizationVisibility();
+    if (visibility != QuickCustomization::Visibility::Default) {
+      dataElement.SetAttribute(
+          "quickCustomizationVisibility",
+          QuickCustomization::VisibilityAsString(visibility));
+    }
   }
 }
 
@@ -289,9 +315,11 @@ void Layout::UnserializeFrom(gd::Project& project,
   gd::EventsListSerialization::UnserializeEventsFrom(
       project, GetEvents(), element.GetChild("events", 0, "Events"));
 
-  objectsContainer.UnserializeObjectsFrom(project, element.GetChild("objects", 0, "Objets"));
+  objectsContainer.UnserializeObjectsFrom(
+      project, element.GetChild("objects", 0, "Objets"));
   if (element.HasChild("objectsFolderStructure")) {
-    objectsContainer.UnserializeFoldersFrom(project, element.GetChild("objectsFolderStructure", 0));
+    objectsContainer.UnserializeFoldersFrom(
+        project, element.GetChild("objectsFolderStructure", 0));
   }
   objectsContainer.AddMissingObjectsInRootFolder();
 
@@ -321,7 +349,6 @@ void Layout::UnserializeFrom(gd::Project& project,
                             "Behavior");  // Compatibility with GD <= 4
     gd::String name = sharedDataElement.GetStringAttribute("name", "", "Name");
 
-
     auto sharedData = CreateBehaviorsSharedData(project, name, type);
     if (sharedData) {
       // Compatibility with GD <= 4.0.98
@@ -336,6 +363,21 @@ void Layout::UnserializeFrom(gd::Project& project,
       else {
         sharedData->UnserializeFrom(sharedDataElement);
       }
+
+      // Handle Quick Customization info.
+      if (sharedDataElement.HasChild(
+              "propertiesQuickCustomizationVisibilities")) {
+        sharedData->GetPropertiesQuickCustomizationVisibilities()
+            .UnserializeFrom(sharedDataElement.GetChild(
+                "propertiesQuickCustomizationVisibilities"));
+      }
+      if (sharedDataElement.HasChild("quickCustomizationVisibility")) {
+        sharedData->SetQuickCustomizationVisibility(
+            QuickCustomization::StringAsVisibility(
+                sharedDataElement.GetStringAttribute(
+                    "quickCustomizationVisibility")));
+      }
+
       behaviorsSharedData[name] = std::move(sharedData);
     }
   }
@@ -390,8 +432,9 @@ gd::String GD_CORE_API GetTypeOfObject(const gd::ObjectsContainer& project,
     type = project.GetObject(name).GetType();
 
   // Search in groups.
-  // Currently, a group is considered as the "intersection" of all of its objects.
-  // Search "groups is the intersection of its objects" in the codebase.
+  // Currently, a group is considered as the "intersection" of all of its
+  // objects. Search "groups is the intersection of its objects" in the
+  // codebase.
   else if (searchInGroups) {
     for (std::size_t i = 0; i < layout.GetObjectGroups().size(); ++i) {
       if (layout.GetObjectGroups()[i].GetName() == name) {
@@ -448,11 +491,12 @@ gd::String GD_CORE_API GetTypeOfObject(const gd::ObjectsContainer& project,
   return type;
 }
 
-void GD_CORE_API FilterBehaviorNamesFromObject(
-    const gd::Object &object, const gd::String &behaviorType,
-    std::vector<gd::String> &behaviorNames) {
+void GD_CORE_API
+FilterBehaviorNamesFromObject(const gd::Object& object,
+                              const gd::String& behaviorType,
+                              std::vector<gd::String>& behaviorNames) {
   for (size_t i = 0; i < behaviorNames.size();) {
-    auto &behaviorName = behaviorNames[i];
+    auto& behaviorName = behaviorNames[i];
     if (!object.HasBehaviorNamed(behaviorName) ||
         object.GetBehavior(behaviorName).GetTypeName() != behaviorType) {
       behaviorNames.erase(behaviorNames.begin() + i);
@@ -462,19 +506,21 @@ void GD_CORE_API FilterBehaviorNamesFromObject(
   }
 }
 
-std::vector<gd::String> GD_CORE_API GetBehaviorNamesInObjectOrGroup(
-    const gd::ObjectsContainer &project, const gd::ObjectsContainer &layout,
-    const gd::String &objectOrGroupName, const gd::String &behaviorType,
-    bool searchInGroups) {
+std::vector<gd::String> GD_CORE_API
+GetBehaviorNamesInObjectOrGroup(const gd::ObjectsContainer& project,
+                                const gd::ObjectsContainer& layout,
+                                const gd::String& objectOrGroupName,
+                                const gd::String& behaviorType,
+                                bool searchInGroups) {
   // Search in objects.
   if (layout.HasObjectNamed(objectOrGroupName)) {
-    auto &object = layout.GetObject(objectOrGroupName);
+    auto& object = layout.GetObject(objectOrGroupName);
     auto behaviorNames = object.GetAllBehaviorNames();
     FilterBehaviorNamesFromObject(object, behaviorType, behaviorNames);
     return behaviorNames;
   }
   if (project.HasObjectNamed(objectOrGroupName)) {
-    auto &object = project.GetObject(objectOrGroupName);
+    auto& object = project.GetObject(objectOrGroupName);
     auto behaviorNames = object.GetAllBehaviorNames();
     FilterBehaviorNamesFromObject(object, behaviorType, behaviorNames);
     return behaviorNames;
@@ -486,9 +532,10 @@ std::vector<gd::String> GD_CORE_API GetBehaviorNamesInObjectOrGroup(
   }
 
   // Search in groups.
-  // Currently, a group is considered as the "intersection" of all of its objects.
-  // Search "groups is the intersection of its objects" in the codebase.
-  const gd::ObjectsContainer *container;
+  // Currently, a group is considered as the "intersection" of all of its
+  // objects. Search "groups is the intersection of its objects" in the
+  // codebase.
+  const gd::ObjectsContainer* container;
   if (layout.GetObjectGroups().Has(objectOrGroupName)) {
     container = &layout;
   } else if (project.GetObjectGroups().Has(objectOrGroupName)) {
@@ -497,7 +544,7 @@ std::vector<gd::String> GD_CORE_API GetBehaviorNamesInObjectOrGroup(
     std::vector<gd::String> behaviorNames;
     return behaviorNames;
   }
-  const vector<gd::String> &groupsObjects =
+  const vector<gd::String>& groupsObjects =
       container->GetObjectGroups().Get(objectOrGroupName).GetAllObjectsNames();
 
   // Empty groups don't contain any behavior.
@@ -510,15 +557,15 @@ std::vector<gd::String> GD_CORE_API GetBehaviorNamesInObjectOrGroup(
   auto behaviorNames = GetBehaviorNamesInObjectOrGroup(
       project, layout, groupsObjects[0], behaviorType, false);
   for (size_t i = 1; i < groupsObjects.size(); i++) {
-    auto &objectName = groupsObjects[i];
+    auto& objectName = groupsObjects[i];
 
     if (layout.HasObjectNamed(objectName)) {
-      auto &object = layout.GetObject(objectName);
+      auto& object = layout.GetObject(objectName);
       FilterBehaviorNamesFromObject(object, behaviorType, behaviorNames);
       return behaviorNames;
     }
     if (project.HasObjectNamed(objectName)) {
-      auto &object = project.GetObject(objectName);
+      auto& object = project.GetObject(objectName);
       FilterBehaviorNamesFromObject(object, behaviorType, behaviorNames);
       return behaviorNames;
     }
@@ -529,10 +576,10 @@ std::vector<gd::String> GD_CORE_API GetBehaviorNamesInObjectOrGroup(
   return behaviorNames;
 }
 
-bool GD_CORE_API HasBehaviorInObjectOrGroup(const gd::ObjectsContainer &project,
-                                            const gd::ObjectsContainer &layout,
-                                            const gd::String &objectOrGroupName,
-                                            const gd::String &behaviorName,
+bool GD_CORE_API HasBehaviorInObjectOrGroup(const gd::ObjectsContainer& project,
+                                            const gd::ObjectsContainer& layout,
+                                            const gd::String& objectOrGroupName,
+                                            const gd::String& behaviorName,
                                             bool searchInGroups) {
   // Search in objects.
   if (layout.HasObjectNamed(objectOrGroupName)) {
@@ -547,9 +594,10 @@ bool GD_CORE_API HasBehaviorInObjectOrGroup(const gd::ObjectsContainer &project,
   }
 
   // Search in groups.
-  // Currently, a group is considered as the "intersection" of all of its objects.
-  // Search "groups is the intersection of its objects" in the codebase.
-  const gd::ObjectsContainer *container;
+  // Currently, a group is considered as the "intersection" of all of its
+  // objects. Search "groups is the intersection of its objects" in the
+  // codebase.
+  const gd::ObjectsContainer* container;
   if (layout.GetObjectGroups().Has(objectOrGroupName)) {
     container = &layout;
   } else if (project.GetObjectGroups().Has(objectOrGroupName)) {
@@ -557,7 +605,7 @@ bool GD_CORE_API HasBehaviorInObjectOrGroup(const gd::ObjectsContainer &project,
   } else {
     return false;
   }
-  const vector<gd::String> &groupsObjects =
+  const vector<gd::String>& groupsObjects =
       container->GetObjectGroups().Get(objectOrGroupName).GetAllObjectsNames();
 
   // Empty groups don't contain any behavior.
@@ -566,9 +614,9 @@ bool GD_CORE_API HasBehaviorInObjectOrGroup(const gd::ObjectsContainer &project,
   }
 
   // Check that all objects have the behavior.
-  for (auto &&object : groupsObjects) {
-    if (!HasBehaviorInObjectOrGroup(project, layout, object, behaviorName,
-                                    false)) {
+  for (auto&& object : groupsObjects) {
+    if (!HasBehaviorInObjectOrGroup(
+            project, layout, object, behaviorName, false)) {
       return false;
     }
   }
@@ -576,18 +624,18 @@ bool GD_CORE_API HasBehaviorInObjectOrGroup(const gd::ObjectsContainer &project,
 }
 
 bool GD_CORE_API IsDefaultBehavior(const gd::ObjectsContainer& project,
-                                         const gd::ObjectsContainer& layout,
-                                         gd::String objectOrGroupName,
-                                         gd::String behaviorName,
-                                         bool searchInGroups) {
+                                   const gd::ObjectsContainer& layout,
+                                   gd::String objectOrGroupName,
+                                   gd::String behaviorName,
+                                   bool searchInGroups) {
   // Search in objects.
   if (layout.HasObjectNamed(objectOrGroupName)) {
-    auto &object = layout.GetObject(objectOrGroupName);
+    auto& object = layout.GetObject(objectOrGroupName);
     return object.HasBehaviorNamed(behaviorName) &&
            object.GetBehavior(behaviorName).IsDefaultBehavior();
   }
   if (project.HasObjectNamed(objectOrGroupName)) {
-    auto &object = project.GetObject(objectOrGroupName);
+    auto& object = project.GetObject(objectOrGroupName);
     return object.HasBehaviorNamed(behaviorName) &&
            object.GetBehavior(behaviorName).IsDefaultBehavior();
   }
@@ -597,9 +645,10 @@ bool GD_CORE_API IsDefaultBehavior(const gd::ObjectsContainer& project,
   }
 
   // Search in groups.
-  // Currently, a group is considered as the "intersection" of all of its objects.
-  // Search "groups is the intersection of its objects" in the codebase.
-  const gd::ObjectsContainer *container;
+  // Currently, a group is considered as the "intersection" of all of its
+  // objects. Search "groups is the intersection of its objects" in the
+  // codebase.
+  const gd::ObjectsContainer* container;
   if (layout.GetObjectGroups().Has(objectOrGroupName)) {
     container = &layout;
   } else if (project.GetObjectGroups().Has(objectOrGroupName)) {
@@ -607,7 +656,7 @@ bool GD_CORE_API IsDefaultBehavior(const gd::ObjectsContainer& project,
   } else {
     return false;
   }
-  const vector<gd::String> &groupsObjects =
+  const vector<gd::String>& groupsObjects =
       container->GetObjectGroups().Get(objectOrGroupName).GetAllObjectsNames();
 
   // Empty groups don't contain any behavior.
@@ -616,30 +665,32 @@ bool GD_CORE_API IsDefaultBehavior(const gd::ObjectsContainer& project,
   }
 
   // Check that all objects have the same type.
-  for (auto &&object : groupsObjects) {
-    if (!IsDefaultBehavior(project, layout, object, behaviorName,
-                                    false)) {
+  for (auto&& object : groupsObjects) {
+    if (!IsDefaultBehavior(project, layout, object, behaviorName, false)) {
       return false;
     }
   }
   return true;
 }
 
-gd::String GD_CORE_API GetTypeOfBehaviorInObjectOrGroup(const gd::ObjectsContainer& project,
-                                         const gd::ObjectsContainer& layout,
-                                         const gd::String& objectOrGroupName,
-                                         const gd::String& behaviorName,
-                                         bool searchInGroups) {
+gd::String GD_CORE_API
+GetTypeOfBehaviorInObjectOrGroup(const gd::ObjectsContainer& project,
+                                 const gd::ObjectsContainer& layout,
+                                 const gd::String& objectOrGroupName,
+                                 const gd::String& behaviorName,
+                                 bool searchInGroups) {
   // Search in objects.
   if (layout.HasObjectNamed(objectOrGroupName)) {
-    auto &object = layout.GetObject(objectOrGroupName);
-    return object.HasBehaviorNamed(behaviorName) ?
-           object.GetBehavior(behaviorName).GetTypeName() : "";
+    auto& object = layout.GetObject(objectOrGroupName);
+    return object.HasBehaviorNamed(behaviorName)
+               ? object.GetBehavior(behaviorName).GetTypeName()
+               : "";
   }
   if (project.HasObjectNamed(objectOrGroupName)) {
-    auto &object = project.GetObject(objectOrGroupName);
-    return object.HasBehaviorNamed(behaviorName) ?
-           object.GetBehavior(behaviorName).GetTypeName() : "";
+    auto& object = project.GetObject(objectOrGroupName);
+    return object.HasBehaviorNamed(behaviorName)
+               ? object.GetBehavior(behaviorName).GetTypeName()
+               : "";
   }
 
   if (!searchInGroups) {
@@ -647,9 +698,10 @@ gd::String GD_CORE_API GetTypeOfBehaviorInObjectOrGroup(const gd::ObjectsContain
   }
 
   // Search in groups.
-  // Currently, a group is considered as the "intersection" of all of its objects.
-  // Search "groups is the intersection of its objects" in the codebase.
-  const gd::ObjectsContainer *container;
+  // Currently, a group is considered as the "intersection" of all of its
+  // objects. Search "groups is the intersection of its objects" in the
+  // codebase.
+  const gd::ObjectsContainer* container;
   if (layout.GetObjectGroups().Has(objectOrGroupName)) {
     container = &layout;
   } else if (project.GetObjectGroups().Has(objectOrGroupName)) {
@@ -657,7 +709,7 @@ gd::String GD_CORE_API GetTypeOfBehaviorInObjectOrGroup(const gd::ObjectsContain
   } else {
     return "";
   }
-  const vector<gd::String> &groupsObjects =
+  const vector<gd::String>& groupsObjects =
       container->GetObjectGroups().Get(objectOrGroupName).GetAllObjectsNames();
 
   // Empty groups don't contain any behavior.
@@ -668,9 +720,9 @@ gd::String GD_CORE_API GetTypeOfBehaviorInObjectOrGroup(const gd::ObjectsContain
   // Check that all objects have the behavior with the same type.
   auto behaviorType = GetTypeOfBehaviorInObjectOrGroup(
       project, layout, groupsObjects[0], behaviorName, false);
-  for (auto &&object : groupsObjects) {
-    if (GetTypeOfBehaviorInObjectOrGroup(project, layout, object, behaviorName,
-                                    false) != behaviorType) {
+  for (auto&& object : groupsObjects) {
+    if (GetTypeOfBehaviorInObjectOrGroup(
+            project, layout, object, behaviorName, false) != behaviorType) {
       return "";
     }
   }
@@ -682,14 +734,14 @@ gd::String GD_CORE_API GetTypeOfBehavior(const gd::ObjectsContainer& project,
                                          gd::String name,
                                          bool searchInGroups) {
   for (std::size_t i = 0; i < layout.GetObjectsCount(); ++i) {
-    const auto &object = layout.GetObject(i);
+    const auto& object = layout.GetObject(i);
     if (object.HasBehaviorNamed(name)) {
       return object.GetBehavior(name).GetTypeName();
     }
   }
 
   for (std::size_t i = 0; i < project.GetObjectsCount(); ++i) {
-    const auto &object = project.GetObject(i);
+    const auto& object = project.GetObject(i);
     if (object.HasBehaviorNamed(name)) {
       return object.GetBehavior(name).GetTypeName();
     }
@@ -726,8 +778,9 @@ GetBehaviorsOfObject(const gd::ObjectsContainer& project,
   }
 
   // Search in groups
-  // Currently, a group is considered as the "intersection" of all of its objects.
-  // Search "groups is the intersection of its objects" in the codebase.
+  // Currently, a group is considered as the "intersection" of all of its
+  // objects. Search "groups is the intersection of its objects" in the
+  // codebase.
   if (searchInGroups) {
     for (std::size_t i = 0; i < layout.GetObjectGroups().size(); ++i) {
       if (layout.GetObjectGroups()[i].GetName() == name) {

Core/GDCore/Project/Layout.h

@@ -369,9 +369,9 @@ class GD_CORE_API Layout {
  private:
   gd::String name;         ///< Scene name
   gd::String mangledName;  ///< The scene name mangled by SceneNameMangler
-  unsigned int backgroundColorR;     ///< Background color Red component
-  unsigned int backgroundColorG;     ///< Background color Green component
-  unsigned int backgroundColorB;     ///< Background color Blue component
+  unsigned int backgroundColorR = 0;     ///< Background color Red component
+  unsigned int backgroundColorG = 0;     ///< Background color Green component
+  unsigned int backgroundColorB = 0;     ///< Background color Blue component
   gd::String title;                  ///< Title displayed in the window
   gd::VariablesContainer variables;  ///< Variables list
   gd::ObjectsContainer objectsContainer;
@@ -379,12 +379,12 @@ class GD_CORE_API Layout {
   gd::LayersContainer layers;
   std::map<gd::String, std::unique_ptr<gd::BehaviorsSharedData>>
       behaviorsSharedData;   ///< Initial shared datas of behaviors
-  bool stopSoundsOnStartup;  ///< True to make the scene stop all sounds at
-                             ///< startup.
-  bool standardSortMethod;   ///< True to sort objects using standard sort.
-  bool disableInputWhenNotFocused;  /// If set to true, the input must be
-                                    /// disabled when the window do not have the
-                                    /// focus.
+  bool stopSoundsOnStartup = true;  ///< True to make the scene stop all sounds at
+                                    ///< startup.
+  bool standardSortMethod = true;   ///< True to sort objects using standard sort.
+  bool disableInputWhenNotFocused = true;  /// If set to true, the input must be
+                                           /// disabled when the window do not have the
+                                           /// focus.
   static gd::BehaviorsSharedData
       badBehaviorSharedData;  ///< Null object, returned when
                               ///< GetBehaviorSharedData can not find the
@@ -405,18 +405,6 @@ class GD_CORE_API Layout {
       const gd::String& behaviorsType);
 };
 
-/**
- * \brief Functor testing layout name.
- * \see gd::Layout
- */
-struct LayoutHasName
-    : public std::binary_function<std::unique_ptr<Layout>, gd::String, bool> {
-  bool operator()(const std::unique_ptr<Layout>& layout,
-                  gd::String name) const {
-    return layout->GetName() == name;
-  }
-};
-
 /**
  * \brief Get the names of all layers from the given layout
  * that are invisible.

Core/GDCore/Project/Object.cpp

@@ -12,8 +12,9 @@
 #include "GDCore/Project/CustomBehavior.h"
 #include "GDCore/Project/Layout.h"
 #include "GDCore/Project/Project.h"
-#include "GDCore/Serialization/SerializerElement.h"
 #include "GDCore/Project/PropertyDescriptor.h"
+#include "GDCore/Project/QuickCustomization.h"
+#include "GDCore/Serialization/SerializerElement.h"
 #include "GDCore/Tools/Log.h"
 #include "GDCore/Tools/UUID/UUID.h"
 
@@ -27,8 +28,8 @@ Object::Object(const gd::String& name_,
     : name(name_),
       configuration(std::move(configuration_)),
       objectVariables(gd::VariablesContainer::SourceType::Object) {
-      SetType(type_);
-    }
+  SetType(type_);
+}
 
 Object::Object(const gd::String& name_,
                const gd::String& type_,
@@ -36,8 +37,8 @@ Object::Object(const gd::String& name_,
     : name(name_),
       configuration(configuration_),
       objectVariables(gd::VariablesContainer::SourceType::Object) {
-      SetType(type_);
-    }
+  SetType(type_);
+}
 
 void Object::Init(const gd::Object& object) {
   persistentUuid = object.persistentUuid;
@@ -54,9 +55,7 @@ void Object::Init(const gd::Object& object) {
   configuration = object.configuration->Clone();
 }
 
-gd::ObjectConfiguration& Object::GetConfiguration() {
-  return *configuration;
-}
+gd::ObjectConfiguration& Object::GetConfiguration() { return *configuration; }
 
 const gd::ObjectConfiguration& Object::GetConfiguration() const {
   return *configuration;
@@ -77,8 +76,7 @@ bool Object::RenameBehavior(const gd::String& name, const gd::String& newName) {
       behaviors.find(newName) != behaviors.end())
     return false;
 
-  std::unique_ptr<Behavior> aut =
-      std::move(behaviors.find(name)->second);
+  std::unique_ptr<Behavior> aut = std::move(behaviors.find(name)->second);
   behaviors.erase(name);
   behaviors[newName] = std::move(aut);
   behaviors[newName]->SetName(newName);
@@ -99,10 +97,10 @@ bool Object::HasBehaviorNamed(const gd::String& name) const {
 }
 
 gd::Behavior* Object::AddNewBehavior(const gd::Project& project,
-                                            const gd::String& type,
-                                            const gd::String& name) {
-  auto initializeAndAdd =
-      [this, &name](std::unique_ptr<gd::Behavior> behavior) {
+                                     const gd::String& type,
+                                     const gd::String& name) {
+  auto initializeAndAdd = [this,
+                           &name](std::unique_ptr<gd::Behavior> behavior) {
     behavior->InitializeContent();
     this->behaviors[name] = std::move(behavior);
     return this->behaviors[name].get();
@@ -111,18 +109,17 @@ gd::Behavior* Object::AddNewBehavior(const gd::Project& project,
   if (project.HasEventsBasedBehavior(type)) {
     return initializeAndAdd(
         gd::make_unique<CustomBehavior>(name, project, type));
-  }
-  else {
+  } else {
     const gd::BehaviorMetadata& behaviorMetadata =
         gd::MetadataProvider::GetBehaviorMetadata(project.GetCurrentPlatform(),
                                                   type);
     if (gd::MetadataProvider::IsBadBehaviorMetadata(behaviorMetadata)) {
-      gd::LogWarning("Tried to create a behavior with an unknown type: " + type
-                     + " on object " + GetName() + "!");
-    // It's probably an events-based behavior that was removed.
-    // Create a custom behavior to preserve the properties values.
-    return initializeAndAdd(
-        gd::make_unique<CustomBehavior>(name, project, type));
+      gd::LogWarning("Tried to create a behavior with an unknown type: " +
+                     type + " on object " + GetName() + "!");
+      // It's probably an events-based behavior that was removed.
+      // Create a custom behavior to preserve the properties values.
+      return initializeAndAdd(
+          gd::make_unique<CustomBehavior>(name, project, type));
     }
     std::unique_ptr<gd::Behavior> behavior(behaviorMetadata.Get().Clone());
     behavior->SetName(name);
@@ -196,6 +193,23 @@ void Object::UnserializeFrom(gd::Project& project,
       else {
         behavior->UnserializeFrom(behaviorElement);
       }
+
+      bool isFolded = behaviorElement.GetBoolAttribute("isFolded", false);
+      behavior->SetFolded(isFolded);
+
+      // Handle Quick Customization info.
+      if (behaviorElement.HasChild(
+              "propertiesQuickCustomizationVisibilities")) {
+        behavior->GetPropertiesQuickCustomizationVisibilities().UnserializeFrom(
+            behaviorElement.GetChild(
+                "propertiesQuickCustomizationVisibilities"));
+      }
+      if (behaviorElement.HasChild("quickCustomizationVisibility")) {
+        behavior->SetQuickCustomizationVisibility(
+            QuickCustomization::StringAsVisibility(
+                behaviorElement.GetStringAttribute(
+                    "quickCustomizationVisibility")));
+      }
     }
   }
 
@@ -217,8 +231,8 @@ void Object::SerializeTo(SerializerElement& element) const {
   std::vector<gd::String> allBehaviors = GetAllBehaviorNames();
   for (std::size_t i = 0; i < allBehaviors.size(); ++i) {
     const gd::Behavior& behavior = GetBehavior(allBehaviors[i]);
-    // Default behaviors are added at the object creation according to metadata.
-    // They don't need to be serialized.
+    // Default behaviors are added at the object creation according to
+    // metadata. They don't need to be serialized.
     if (behavior.IsDefaultBehavior()) {
       continue;
     }
@@ -228,8 +242,27 @@ void Object::SerializeTo(SerializerElement& element) const {
     behaviorElement.RemoveChild("type");  // The content can contain type or
                                           // name properties, remove them.
     behaviorElement.RemoveChild("name");
+    behaviorElement.RemoveChild("isFolded");
     behaviorElement.SetAttribute("type", behavior.GetTypeName());
     behaviorElement.SetAttribute("name", behavior.GetName());
+    if (behavior.IsFolded()) behaviorElement.SetAttribute("isFolded", true);
+
+    // Handle Quick Customization info.
+    behaviorElement.RemoveChild("propertiesQuickCustomizationVisibilities");
+    const QuickCustomizationVisibilitiesContainer&
+        propertiesQuickCustomizationVisibilities =
+            behavior.GetPropertiesQuickCustomizationVisibilities();
+    if (!propertiesQuickCustomizationVisibilities.IsEmpty()) {
+      propertiesQuickCustomizationVisibilities.SerializeTo(
+          behaviorElement.AddChild("propertiesQuickCustomizationVisibilities"));
+    }
+    const QuickCustomization::Visibility visibility =
+        behavior.GetQuickCustomizationVisibility();
+    if (visibility != QuickCustomization::Visibility::Default) {
+      behaviorElement.SetAttribute(
+          "quickCustomizationVisibility",
+          QuickCustomization::VisibilityAsString(visibility));
+    }
   }
 
   configuration->SerializeTo(element);

Core/GDCore/Project/ObjectFolderOrObject.h

@@ -193,7 +193,7 @@ class GD_CORE_API ObjectFolderOrObject {
   static gd::ObjectFolderOrObject badObjectFolderOrObject;
 
   gd::ObjectFolderOrObject*
-      parent;  // nullptr if root folder, points to the parent folder otherwise.
+      parent = nullptr;  // nullptr if root folder, points to the parent folder otherwise.
   QuickCustomization::Visibility quickCustomizationVisibility;
 
   // Representing an object:

Core/GDCore/Project/ObjectGroup.h

@@ -20,8 +20,8 @@ namespace gd {
 /**
  * \brief Represents an object group.
  *
- * Objects groups do not really contains objects : They are just used in events,
- * so as to create events which can be applied to several objects.
+ * Objects groups do not really contains objects: they are just used in events,
+ * to create events which can be applied to several objects.
  *
  * \ingroup PlatformDefinition
  */

Core/GDCore/Project/ObjectsContainer.cpp

@@ -16,7 +16,9 @@
 
 namespace gd {
 
-ObjectsContainer::ObjectsContainer() {
+ObjectsContainer::ObjectsContainer(
+    const ObjectsContainer::SourceType sourceType_)
+    : sourceType(sourceType_) {
   rootFolder = gd::make_unique<gd::ObjectFolderOrObject>("__ROOT");
 }
 
@@ -34,6 +36,7 @@ ObjectsContainer& ObjectsContainer::operator=(
 }
 
 void ObjectsContainer::Init(const gd::ObjectsContainer& other) {
+  sourceType = other.sourceType;
   initialObjects = gd::Clone(other.initialObjects);
   objectGroups = other.objectGroups;
   // The objects folders are not copied.
@@ -205,6 +208,14 @@ void ObjectsContainer::MoveObjectFolderOrObjectToAnotherContainerInFolder(
       objectFolderOrObject, newParentFolder, newPosition);
 }
 
+std::set<gd::String> ObjectsContainer::GetAllObjectNames() const {
+  std::set<gd::String> names;
+  for (const auto& object : initialObjects) {
+    names.insert(object->GetName());
+  }
+  return names;
+}
+
 std::vector<const ObjectFolderOrObject*>
 ObjectsContainer::GetAllObjectFolderOrObjects() const {
   std::vector<const ObjectFolderOrObject*> results;

Core/GDCore/Project/ObjectsContainer.h

@@ -3,10 +3,11 @@
  * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
  * reserved. This project is released under the MIT License.
  */
-#ifndef GDCORE_OBJECTSCONTAINER_H
-#define GDCORE_OBJECTSCONTAINER_H
+#pragma once
+
 #include <memory>
 #include <vector>
+#include <set>
 #include "GDCore/String.h"
 #include "GDCore/Project/ObjectGroupsContainer.h"
 #include "GDCore/Project/ObjectFolderOrObject.h"
@@ -35,15 +36,25 @@ namespace gd {
  */
 class GD_CORE_API ObjectsContainer {
  public:
+  enum SourceType {
+      Unknown,
+      Global,
+      Scene,
+      Object,
+      Function,
+  };
+
   /**
-   * \brief Default constructor creating a container without any objects.
+   * \brief Constructor creating a container without any objects.
    */
-  ObjectsContainer();
+  ObjectsContainer(const SourceType sourceType);
   virtual ~ObjectsContainer();
-  
+
   ObjectsContainer(const ObjectsContainer&);
   ObjectsContainer& operator=(const ObjectsContainer& rhs);
 
+  SourceType GetSourceType() const { return sourceType; }
+
   /** \name Objects management
    * Members functions related to objects management.
    */
@@ -57,7 +68,7 @@ class GD_CORE_API ObjectsContainer {
   /**
    * \brief Return a reference to the object called \a name.
    */
-  Object& GetObject(const gd::String& name);
+  gd::Object& GetObject(const gd::String& name);
 
   /**
    * \brief Return a reference to the object called \a name.
@@ -68,7 +79,7 @@ class GD_CORE_API ObjectsContainer {
    * \brief Return a reference to the object at position \a index in the objects
    * list
    */
-  Object& GetObject(std::size_t index);
+  gd::Object& GetObject(std::size_t index);
 
   /**
    * \brief Return a reference to the object at position \a index in the objects
@@ -168,6 +179,8 @@ class GD_CORE_API ObjectsContainer {
   const std::vector<std::unique_ptr<gd::Object> >& GetObjects() const {
     return initialObjects;
   }
+
+  std::set<gd::String> GetAllObjectNames() const;
   ///@}
 
   /**
@@ -232,6 +245,7 @@ class GD_CORE_API ObjectsContainer {
   gd::ObjectGroupsContainer objectGroups;
 
  private:
+  SourceType sourceType = Unknown;
   std::unique_ptr<gd::ObjectFolderOrObject> rootFolder;
 
   /**
@@ -242,5 +256,3 @@ class GD_CORE_API ObjectsContainer {
 };
 
 }  // namespace gd
-
-#endif  // GDCORE_OBJECTSCONTAINER_H

Core/GDCore/Project/ObjectsContainersList.cpp

@@ -416,7 +416,8 @@ gd::String ObjectsContainersList::GetTypeOfObject(
     return "";
   }
   if (objectsContainers.size() == 1) {
-    gd::ObjectsContainer emptyObjectsContainer;
+    gd::ObjectsContainer emptyObjectsContainer(
+        gd::ObjectsContainer::SourceType::Unknown);
     return gd::GetTypeOfObject(emptyObjectsContainer, *objectsContainers[0],
                                objectName, true);
   }
@@ -439,7 +440,8 @@ bool ObjectsContainersList::HasBehaviorInObjectOrGroup(
     return false;
   }
   if (objectsContainers.size() == 1) {
-    gd::ObjectsContainer emptyObjectsContainer;
+    gd::ObjectsContainer emptyObjectsContainer(
+        gd::ObjectsContainer::SourceType::Unknown);
     return gd::HasBehaviorInObjectOrGroup(
         emptyObjectsContainer, *objectsContainers[0], objectOrGroupName,
         behaviorName, true);
@@ -468,7 +470,8 @@ gd::String ObjectsContainersList::GetTypeOfBehaviorInObjectOrGroup(
     return "";
   }
   if (objectsContainers.size() == 1) {
-    gd::ObjectsContainer emptyObjectsContainer;
+    gd::ObjectsContainer emptyObjectsContainer(
+        gd::ObjectsContainer::SourceType::Unknown);
     return gd::GetTypeOfBehaviorInObjectOrGroup(
         emptyObjectsContainer, *objectsContainers[0], objectOrGroupName,
         behaviorName, searchInGroups);
@@ -495,7 +498,8 @@ gd::String ObjectsContainersList::GetTypeOfBehavior(
     return "";
   }
   if (objectsContainers.size() == 1) {
-    gd::ObjectsContainer emptyObjectsContainer;
+    gd::ObjectsContainer emptyObjectsContainer(
+        gd::ObjectsContainer::SourceType::Unknown);
     return gd::GetTypeOfBehavior(emptyObjectsContainer, *objectsContainers[0],
                                  behaviorName, searchInGroups);
   }
@@ -521,7 +525,8 @@ std::vector<gd::String> ObjectsContainersList::GetBehaviorsOfObject(
     return behaviors;
   }
   if (objectsContainers.size() == 1) {
-    gd::ObjectsContainer emptyObjectsContainer;
+    gd::ObjectsContainer emptyObjectsContainer(
+        gd::ObjectsContainer::SourceType::Unknown);
     return gd::GetBehaviorsOfObject(emptyObjectsContainer,
                                     *objectsContainers[0], objectName,
                                     searchInGroups);
@@ -530,6 +535,33 @@ std::vector<gd::String> ObjectsContainersList::GetBehaviorsOfObject(
       *objectsContainers[0], *objectsContainers[1], objectName, searchInGroups);
 }
 
+std::vector<gd::String> ObjectsContainersList::GetBehaviorNamesInObjectOrGroup(
+    const gd::String &objectOrGroupName, const gd::String &behaviorType, bool searchInGroups) const {
+  if (objectsContainers.size() > 2) {
+    // TODO: rework forwarded methods so they can work with any number of
+    // containers.
+    gd::LogFatalError(
+        "ObjectsContainersList::GetBehaviorNamesInObjectOrGroup called with objectsContainers "
+        "not being exactly 2. This is a logical error and will crash.");
+  }
+  if (objectsContainers.size() == 0) {
+    gd::LogWarning("ObjectsContainersList::GetBehaviorNamesInObjectOrGroup called without any "
+                   "objectsContainer");
+    std::vector<gd::String> behaviors;
+    return behaviors;
+  }
+  if (objectsContainers.size() == 1) {
+    gd::ObjectsContainer emptyObjectsContainer(
+        gd::ObjectsContainer::SourceType::Unknown);
+    return gd::GetBehaviorNamesInObjectOrGroup(emptyObjectsContainer,
+                                    *objectsContainers[0], objectOrGroupName, behaviorType,
+                                    searchInGroups);
+  }
+  return gd::GetBehaviorNamesInObjectOrGroup(
+      *objectsContainers[0], *objectsContainers[1], objectOrGroupName, behaviorType, searchInGroups);
+}
+
+
 std::vector<gd::String> ObjectsContainersList::GetAnimationNamesOfObject(
     const gd::String &objectOrGroupName) const {
   std::vector<gd::String> animationNames;
@@ -589,4 +621,35 @@ std::vector<gd::String> ObjectsContainersList::GetAnimationNamesOfObject(
   return animationNames;
 }
 
+const ObjectsContainer *
+ObjectsContainersList::GetObjectsContainerFromObjectName(
+    const gd::String &objectOrGroupName) const {
+  for (auto it = objectsContainers.rbegin(); it != objectsContainers.rend();
+       ++it) {
+    if ((*it)->HasObjectNamed(objectOrGroupName) ||
+        (*it)->GetObjectGroups().Has(objectOrGroupName)) {
+      return *it;
+    }
+  }
+  return nullptr;
+}
+
+const gd::ObjectsContainer::SourceType
+ObjectsContainersList::GetObjectsContainerSourceType(
+    const gd::String &objectOrGroupName) const {
+  const auto *objectsContainer =
+      GetObjectsContainerFromObjectName(objectOrGroupName);
+  return objectsContainer ? objectsContainer->GetSourceType()
+                          : gd::ObjectsContainer::SourceType::Unknown;
+}
+
+const gd::ObjectsContainer &
+ObjectsContainersList::GetObjectsContainer(std::size_t index) const {
+  return *objectsContainers[index];
+}
+
+std::size_t ObjectsContainersList::GetObjectsContainersCount() const {
+  return objectsContainers.size();
+}
+
 }  // namespace gd

Core/GDCore/Project/ObjectsContainersList.h

@@ -2,12 +2,12 @@
 #include <vector>
 
 #include "Variable.h"
+#include "GDCore/Project/ObjectsContainer.h"
 
 namespace gd {
 class String;
 class Project;
 class Layout;
-class ObjectsContainer;
 class VariablesContainer;
 class Object;
 class ObjectConfiguration;
@@ -50,6 +50,11 @@ class GD_CORE_API ObjectsContainersList {
    */
   bool HasObjectOrGroupNamed(const gd::String& name) const;
 
+  /**
+   * \brief Check if the specified object exists ignoring groups.
+   */
+  bool HasObjectNamed(const gd::String& name) const;
+
   enum VariableExistence {
     DoesNotExist,
     Exists,
@@ -128,6 +133,18 @@ class GD_CORE_API ObjectsContainersList {
   std::vector<gd::String> GetBehaviorsOfObject(
       const gd::String& objectName, bool searchInGroups = true) const;
 
+  /**
+   * \brief Get behaviors of an object/group of a given behavior type.
+   * \note The behaviors of a group are the behaviors which are found in common
+   * when looking all the objects of the group.
+   *
+   * @return Vector containing names of behaviors
+   */
+  std::vector<gd::String>
+  GetBehaviorNamesInObjectOrGroup(const gd::String &objectOrGroupName,
+                       const gd::String &behaviorType,
+                       bool searchInGroups = true) const;
+
   /**
    * \brief Get the animation names of an object/group.
    * \note The animation names of a group are the animation names common to
@@ -173,13 +190,41 @@ class GD_CORE_API ObjectsContainersList {
       std::function<void(const gd::String& variableName,
                          const gd::Variable& variable)> fn) const;
 
+  /**
+   * \brief Return the source type of the container for the specified object or
+   * group of objects.
+   */
+  const gd::ObjectsContainer::SourceType GetObjectsContainerSourceType(
+      const gd::String& objectOrGroupName) const;
+
+  /**
+   * Get the objects container for for the specified object or group of objects.
+   */
+  const ObjectsContainer *
+  GetObjectsContainerFromObjectName(const gd::String &objectOrGroupName) const;
+
+  /**
+   * \brief Return a the objects container at position \a index.
+   *
+   * \warning The returned `ObjectsContainer` may contain cloned objects (in the case of
+   * `ProjectScopedContainers::MakeNewProjectScopedContainersForEventsBasedObject`)
+   * or "fake" objects used by events like parameters. They must not be used to
+   * edit the objects.
+   * Search for "ProjectScopedContainers wrongly containing temporary objects containers or objects"
+   * in the codebase.
+   */
+  const gd::ObjectsContainer &GetObjectsContainer(std::size_t index) const;
+
+  /**
+   * \brief Return the number of objects containers.
+   */
+  std::size_t GetObjectsContainersCount() const;
+
   /** Do not use - should be private but accessible to let Emscripten create a
    * temporary. */
   ObjectsContainersList(){};
 
  private:
-  bool HasObjectNamed(const gd::String& name) const;
-
   const gd::Object* GetObject(const gd::String& name) const;
 
   bool HasObjectWithVariableNamed(const gd::String& objectName,

Core/GDCore/Project/Project.cpp

@@ -71,23 +71,22 @@ Project::Project()
       isPlayableWithKeyboard(false),
       isPlayableWithGamepad(false),
       isPlayableWithMobile(false),
-      currentPlatform(NULL),
+      currentPlatform(nullptr),
       gdMajorVersion(gd::VersionWrapper::Major()),
       gdMinorVersion(gd::VersionWrapper::Minor()),
       gdBuildVersion(gd::VersionWrapper::Build()),
-      variables(gd::VariablesContainer::SourceType::Global) {}
+      variables(gd::VariablesContainer::SourceType::Global),
+      objectsContainer(gd::ObjectsContainer::SourceType::Global) {}
 
 Project::~Project() {}
 
 void Project::ResetProjectUuid() { projectUuid = UUID::MakeUuid4(); }
 
-std::unique_ptr<gd::Object> Project::CreateObject(
-    const gd::String& objectType, const gd::String& name) const {
-  std::unique_ptr<gd::Object> object = gd::make_unique<Object>(
-      name, objectType, CreateObjectConfiguration(objectType));
-
+void Project::EnsureObjectDefaultBehaviors(gd::Object& object) const {
   auto& platform = GetCurrentPlatform();
   auto& project = *this;
+  auto& objectType = object.GetType();
+
   auto addDefaultBehavior = [&platform, &project, &object, &objectType](
                                 const gd::String& behaviorType) {
     auto& behaviorMetadata =
@@ -97,17 +96,47 @@ std::unique_ptr<gd::Object> Project::CreateObject(
                      " has an unknown default behavior: " + behaviorType);
       return;
     }
-    auto* behavior = object->AddNewBehavior(
-        project, behaviorType, behaviorMetadata.GetDefaultName());
-    behavior->SetDefaultBehavior(true);
+
+    const gd::String& behaviorName = behaviorMetadata.GetDefaultName();
+
+    // Check if we can keep a behavior that would have been already set up on the object.
+    if (object.HasBehaviorNamed(behaviorName)) {
+      const auto& behavior = object.GetBehavior(behaviorName);
+
+      if (!behavior.IsDefaultBehavior() || behavior.GetTypeName() != behaviorType) {
+        // Behavior type has changed, remove it so it is re-created.
+        object.RemoveBehavior(behaviorName);
+      }
+    }
+
+    if (!object.HasBehaviorNamed(behaviorName)) {
+      auto* behavior = object.AddNewBehavior(
+          project, behaviorType, behaviorName);
+      behavior->SetDefaultBehavior(true);
+    }
   };
 
   auto &objectMetadata =
       gd::MetadataProvider::GetObjectMetadata(platform, objectType);
   if (!MetadataProvider::IsBadObjectMetadata(objectMetadata)) {
-    for (auto &behaviorType : objectMetadata.GetDefaultBehaviors()) {
+    // Add all default behaviors.
+    const auto& defaultBehaviorTypes = objectMetadata.GetDefaultBehaviors();
+    for (auto &behaviorType : defaultBehaviorTypes) {
       addDefaultBehavior(behaviorType);
     }
+
+    // Ensure there are no default behaviors that would not be required left on the object.
+    for (const auto& behaviorName : object.GetAllBehaviorNames()) {
+      auto& behavior = object.GetBehavior(behaviorName);
+      if (!behavior.IsDefaultBehavior()) {
+        // Non default behaviors are not handled by this function.
+        continue;
+      }
+
+      if (defaultBehaviorTypes.find(behavior.GetTypeName()) == defaultBehaviorTypes.end()) {
+        object.RemoveBehavior(behaviorName);
+      }
+    }
   }
   // During project deserialization, event-based object metadata are not yet
   // generated. Default behaviors will be added by
@@ -115,6 +144,14 @@ std::unique_ptr<gd::Object> Project::CreateObject(
   else if (!project.HasEventsBasedObject(objectType)) {
     gd::LogWarning("Object: " + name + " has an unknown type: " + objectType);
   }
+}
+
+std::unique_ptr<gd::Object> Project::CreateObject(
+    const gd::String& objectType, const gd::String& name) const {
+  std::unique_ptr<gd::Object> object = gd::make_unique<Object>(
+      name, objectType, CreateObjectConfiguration(objectType));
+
+  EnsureObjectDefaultBehaviors(*object);
 
   return std::move(object);
 }
@@ -264,15 +301,21 @@ bool Project::RemovePlatform(const gd::String& platformName) {
 bool Project::HasLayoutNamed(const gd::String& name) const {
   return (find_if(scenes.begin(),
                   scenes.end(),
-                  bind2nd(gd::LayoutHasName(), name)) != scenes.end());
+                  [&name](const std::unique_ptr<gd::Layout>& layout) {
+                    return layout->GetName() == name;
+                  }) != scenes.end());
 }
 gd::Layout& Project::GetLayout(const gd::String& name) {
   return *(*find_if(
-      scenes.begin(), scenes.end(), bind2nd(gd::LayoutHasName(), name)));
+      scenes.begin(), scenes.end(), [&name](const std::unique_ptr<gd::Layout>& layout) {
+        return layout->GetName() == name;
+      }));
 }
 const gd::Layout& Project::GetLayout(const gd::String& name) const {
   return *(*find_if(
-      scenes.begin(), scenes.end(), bind2nd(gd::LayoutHasName(), name)));
+      scenes.begin(), scenes.end(), [&name](const std::unique_ptr<gd::Layout>& layout) {
+        return layout->GetName() == name;
+      }));
 }
 gd::Layout& Project::GetLayout(std::size_t index) { return *scenes[index]; }
 const gd::Layout& Project::GetLayout(std::size_t index) const {
@@ -317,7 +360,9 @@ gd::Layout& Project::InsertLayout(const gd::Layout& layout,
 
 void Project::RemoveLayout(const gd::String& name) {
   std::vector<std::unique_ptr<gd::Layout> >::iterator scene =
-      find_if(scenes.begin(), scenes.end(), bind2nd(gd::LayoutHasName(), name));
+      find_if(scenes.begin(), scenes.end(), [&name](const std::unique_ptr<gd::Layout>& layout) {
+        return layout->GetName() == name;
+      });
   if (scene == scenes.end()) return;
 
   scenes.erase(scene);
@@ -326,19 +371,24 @@ void Project::RemoveLayout(const gd::String& name) {
 bool Project::HasExternalEventsNamed(const gd::String& name) const {
   return (find_if(externalEvents.begin(),
                   externalEvents.end(),
-                  bind2nd(gd::ExternalEventsHasName(), name)) !=
-          externalEvents.end());
+                  [&name](const std::unique_ptr<gd::ExternalEvents>& externalEvents) {
+                    return externalEvents->GetName() == name;
+                  }) != externalEvents.end());
 }
 gd::ExternalEvents& Project::GetExternalEvents(const gd::String& name) {
   return *(*find_if(externalEvents.begin(),
                     externalEvents.end(),
-                    bind2nd(gd::ExternalEventsHasName(), name)));
+                    [&name](const std::unique_ptr<gd::ExternalEvents>& externalEvents) {
+                      return externalEvents->GetName() == name;
+                    }));
 }
 const gd::ExternalEvents& Project::GetExternalEvents(
     const gd::String& name) const {
   return *(*find_if(externalEvents.begin(),
                     externalEvents.end(),
-                    bind2nd(gd::ExternalEventsHasName(), name)));
+                    [&name](const std::unique_ptr<gd::ExternalEvents>& externalEvents) {
+                      return externalEvents->GetName() == name;
+                    }));
 }
 gd::ExternalEvents& Project::GetExternalEvents(std::size_t index) {
   return *externalEvents[index];
@@ -382,7 +432,9 @@ void Project::RemoveExternalEvents(const gd::String& name) {
   std::vector<std::unique_ptr<gd::ExternalEvents> >::iterator events =
       find_if(externalEvents.begin(),
               externalEvents.end(),
-              bind2nd(gd::ExternalEventsHasName(), name));
+              [&name](const std::unique_ptr<gd::ExternalEvents>& externalEvents) {
+                return externalEvents->GetName() == name;
+              });
   if (events == externalEvents.end()) return;
 
   externalEvents.erase(events);
@@ -448,19 +500,24 @@ void Project::SwapExternalLayouts(std::size_t first, std::size_t second) {
 bool Project::HasExternalLayoutNamed(const gd::String& name) const {
   return (find_if(externalLayouts.begin(),
                   externalLayouts.end(),
-                  bind2nd(gd::ExternalLayoutHasName(), name)) !=
-          externalLayouts.end());
+                  [&name](const std::unique_ptr<gd::ExternalLayout>& externalLayout) {
+                    return externalLayout->GetName() == name;
+                  }) != externalLayouts.end());
 }
 gd::ExternalLayout& Project::GetExternalLayout(const gd::String& name) {
   return *(*find_if(externalLayouts.begin(),
                     externalLayouts.end(),
-                    bind2nd(gd::ExternalLayoutHasName(), name)));
+                    [&name](const std::unique_ptr<gd::ExternalLayout>& externalLayout) {
+                      return externalLayout->GetName() == name;
+                    }));
 }
 const gd::ExternalLayout& Project::GetExternalLayout(
     const gd::String& name) const {
   return *(*find_if(externalLayouts.begin(),
                     externalLayouts.end(),
-                    bind2nd(gd::ExternalLayoutHasName(), name)));
+                    [&name](const std::unique_ptr<gd::ExternalLayout>& externalLayout) {
+                      return externalLayout->GetName() == name;
+                    }));
 }
 gd::ExternalLayout& Project::GetExternalLayout(std::size_t index) {
   return *externalLayouts[index];
@@ -504,7 +561,9 @@ void Project::RemoveExternalLayout(const gd::String& name) {
   std::vector<std::unique_ptr<gd::ExternalLayout> >::iterator externalLayout =
       find_if(externalLayouts.begin(),
               externalLayouts.end(),
-              bind2nd(gd::ExternalLayoutHasName(), name));
+              [&name](const std::unique_ptr<gd::ExternalLayout>& externalLayout) {
+                return externalLayout->GetName() == name;
+              });
   if (externalLayout == externalLayouts.end()) return;
 
   externalLayouts.erase(externalLayout);
@@ -805,34 +864,7 @@ void Project::UnserializeFrom(const SerializerElement& element) {
   eventsFunctionsExtensions.clear();
   const SerializerElement& eventsFunctionsExtensionsElement =
       element.GetChild("eventsFunctionsExtensions");
-  eventsFunctionsExtensionsElement.ConsiderAsArrayOf(
-      "eventsFunctionsExtension");
-  // First, only unserialize behaviors and objects names.
-  // As event based objects can contains CustomObject and Custom Object,
-  // this allows them to reference EventBasedBehavior and EventBasedObject
-  // respectively.
-  for (std::size_t i = 0;
-       i < eventsFunctionsExtensionsElement.GetChildrenCount();
-       ++i) {
-    const SerializerElement& eventsFunctionsExtensionElement =
-        eventsFunctionsExtensionsElement.GetChild(i);
-
-    gd::EventsFunctionsExtension& newEventsFunctionsExtension =
-        InsertNewEventsFunctionsExtension("",
-                                          GetEventsFunctionsExtensionsCount());
-    newEventsFunctionsExtension.UnserializeExtensionDeclarationFrom(
-        *this, eventsFunctionsExtensionElement);
-  }
-  // Then unserialize functions, behaviors and objects content.
-  for (std::size_t i = 0;
-       i < eventsFunctionsExtensionsElement.GetChildrenCount();
-       ++i) {
-    const SerializerElement& eventsFunctionsExtensionElement =
-        eventsFunctionsExtensionsElement.GetChild(i);
-
-    eventsFunctionsExtensions.at(i)->UnserializeExtensionImplementationFrom(
-        *this, eventsFunctionsExtensionElement);
-  }
+  UnserializeAndInsertExtensionsFrom(eventsFunctionsExtensionsElement);
 
   objectsContainer.GetObjectGroups().UnserializeFrom(
       element.GetChild("objectsGroups", 0, "ObjectGroups"));
@@ -900,6 +932,120 @@ void Project::UnserializeFrom(const SerializerElement& element) {
   }
 }
 
+void Project::UnserializeAndInsertExtensionsFrom(
+  const gd::SerializerElement &eventsFunctionsExtensionsElement) {
+  eventsFunctionsExtensionsElement.ConsiderAsArrayOf(
+      "eventsFunctionsExtension");
+  // First, only unserialize behaviors and objects names.
+  // As event based objects can contains custom behaviors and custom objects,
+  // this allows them to reference EventBasedBehavior and EventBasedObject
+  // respectively.
+  for (std::size_t i = 0;
+       i < eventsFunctionsExtensionsElement.GetChildrenCount();
+       ++i) {
+    const SerializerElement& eventsFunctionsExtensionElement =
+        eventsFunctionsExtensionsElement.GetChild(i);
+    const gd::String& name = eventsFunctionsExtensionElement.GetStringAttribute("name");
+
+    gd::EventsFunctionsExtension& eventsFunctionsExtension =
+        HasEventsFunctionsExtensionNamed(name)
+            ? GetEventsFunctionsExtension(name)
+            : InsertNewEventsFunctionsExtension(
+                  name, GetEventsFunctionsExtensionsCount());
+    eventsFunctionsExtension.UnserializeExtensionDeclarationFrom(
+        *this, eventsFunctionsExtensionElement);
+  }
+
+  // Then unserialize functions, behaviors and objects content.
+  for (gd::String &extensionName :
+       GetUnserializingOrderExtensionNames(eventsFunctionsExtensionsElement)) {
+    size_t extensionIndex = GetEventsFunctionsExtensionPosition(extensionName);
+    const SerializerElement &eventsFunctionsExtensionElement =
+        eventsFunctionsExtensionsElement.GetChild(extensionIndex);
+
+    eventsFunctionsExtensions.at(extensionIndex)
+        ->UnserializeExtensionImplementationFrom(
+            *this, eventsFunctionsExtensionElement);
+  }
+}
+
+std::vector<gd::String> Project::GetUnserializingOrderExtensionNames(
+    const gd::SerializerElement &eventsFunctionsExtensionsElement) {
+
+  // Some extension have custom objects, which have child objects coming from other extension.
+  // These child objects must be loaded completely before the parent custom obejct can be unserialized.
+  // This implies: an order on the extension unserialization (and no cycles).
+
+  // At the beginning, everything is yet to be loaded.
+  std::vector<gd::String> remainingExtensionNames(
+      eventsFunctionsExtensions.size());
+  for (std::size_t i = 0; i < eventsFunctionsExtensions.size(); ++i) {
+    remainingExtensionNames[i] = eventsFunctionsExtensions.at(i)->GetName();
+  }
+
+  // Helper allowing to find if an extension has an object that depends on
+  // at least one other object from another extension that is not loaded yet.
+  auto isDependentFromRemainingExtensions =
+      [&remainingExtensionNames](
+          const gd::SerializerElement &eventsFunctionsExtensionElement) {
+        auto &eventsBasedObjectsElement =
+            eventsFunctionsExtensionElement.GetChild("eventsBasedObjects");
+        eventsBasedObjectsElement.ConsiderAsArrayOf("eventsBasedObject");
+        for (std::size_t eventsBasedObjectsIndex = 0;
+             eventsBasedObjectsIndex <
+             eventsBasedObjectsElement.GetChildrenCount();
+             ++eventsBasedObjectsIndex) {
+          auto &objectsElement =
+              eventsBasedObjectsElement.GetChild(eventsBasedObjectsIndex)
+                  .GetChild("objects");
+          objectsElement.ConsiderAsArrayOf("object");
+
+          for (std::size_t objectIndex = 0;
+               objectIndex < objectsElement.GetChildrenCount(); ++objectIndex) {
+            const gd::String &objectType =
+                objectsElement.GetChild(objectIndex).GetStringAttribute("type");
+
+            gd::String extensionName =
+                eventsFunctionsExtensionElement.GetStringAttribute("name");
+            gd::String usedExtensionName =
+                gd::PlatformExtension::GetExtensionFromFullObjectType(objectType);
+
+            if (usedExtensionName != extensionName &&
+                std::find(remainingExtensionNames.begin(),
+                          remainingExtensionNames.end(),
+                          usedExtensionName) != remainingExtensionNames.end()) {
+              return true;
+            }
+          }
+        }
+        return false;
+      };
+
+  // Find the order of loading so that the extensions are loaded when all the other
+  // extensions they depend on are already loaded.
+  std::vector<gd::String> loadOrderExtensionNames;
+  bool foundAnyExtension = true;
+  while (foundAnyExtension) {
+    foundAnyExtension = false;
+    for (std::size_t i = 0; i < remainingExtensionNames.size(); ++i) {
+      auto extensionName = remainingExtensionNames[i];
+      size_t extensionIndex =
+          GetEventsFunctionsExtensionPosition(extensionName);
+      const SerializerElement &eventsFunctionsExtensionElement =
+          eventsFunctionsExtensionsElement.GetChild(extensionIndex);
+
+      if (!isDependentFromRemainingExtensions(
+              eventsFunctionsExtensionElement)) {
+        loadOrderExtensionNames.push_back(extensionName);
+        remainingExtensionNames.erase(remainingExtensionNames.begin() + i);
+        i--;
+        foundAnyExtension = true;
+      }
+    }
+  }
+  return loadOrderExtensionNames;
+}
+
 void Project::SerializeTo(SerializerElement& element) const {
   SerializerElement& versionElement = element.AddChild("gdVersion");
   versionElement.SetAttribute("major", gd::VersionWrapper::Major());
@@ -1076,7 +1222,9 @@ bool Project::HasSourceFile(gd::String name, gd::String language) const {
   vector<std::unique_ptr<SourceFile> >::const_iterator sourceFile =
       find_if(externalSourceFiles.begin(),
               externalSourceFiles.end(),
-              bind2nd(gd::ExternalSourceFileHasName(), name));
+              [&name](const std::unique_ptr<SourceFile>& sourceFile) {
+                return sourceFile->GetFileName() == name;
+              });
 
   if (sourceFile == externalSourceFiles.end()) return false;
 
@@ -1086,20 +1234,26 @@ bool Project::HasSourceFile(gd::String name, gd::String language) const {
 gd::SourceFile& Project::GetSourceFile(const gd::String& name) {
   return *(*find_if(externalSourceFiles.begin(),
                     externalSourceFiles.end(),
-                    bind2nd(gd::ExternalSourceFileHasName(), name)));
+                    [&name](const std::unique_ptr<SourceFile>& sourceFile) {
+                      return sourceFile->GetFileName() == name;
+                    }));
 }
 
 const gd::SourceFile& Project::GetSourceFile(const gd::String& name) const {
   return *(*find_if(externalSourceFiles.begin(),
                     externalSourceFiles.end(),
-                    bind2nd(gd::ExternalSourceFileHasName(), name)));
+                    [&name](const std::unique_ptr<SourceFile>& sourceFile) {
+                      return sourceFile->GetFileName() == name;
+                    }));
 }
 
 void Project::RemoveSourceFile(const gd::String& name) {
   std::vector<std::unique_ptr<gd::SourceFile> >::iterator sourceFile =
       find_if(externalSourceFiles.begin(),
               externalSourceFiles.end(),
-              bind2nd(gd::ExternalSourceFileHasName(), name));
+              [&name](const std::unique_ptr<SourceFile>& sourceFile) {
+                return sourceFile->GetFileName() == name;
+              });
   if (sourceFile == externalSourceFiles.end()) return;
 
   externalSourceFiles.erase(sourceFile);
@@ -1121,7 +1275,10 @@ gd::SourceFile& Project::InsertNewSourceFile(const gd::String& name,
   return newlyInsertedSourceFile;
 }
 
-Project::Project(const Project& other) { Init(other); }
+Project::Project(const Project &other)
+    : objectsContainer(gd::ObjectsContainer::SourceType::Global) {
+  Init(other);
+}
 
 Project& Project::operator=(const Project& other) {
   if (this != &other) Init(other);

Core/GDCore/Project/Project.h

@@ -523,13 +523,7 @@ class GD_CORE_API Project {
   std::unique_ptr<gd::Object> CreateObject(const gd::String& type,
                                            const gd::String& name) const;
 
-  /**
-   * Create an object configuration of the given type.
-   *
-   * \param type The type of the object
-   */
-  std::unique_ptr<gd::ObjectConfiguration> CreateObjectConfiguration(
-      const gd::String& type) const;
+  void EnsureObjectDefaultBehaviors(gd::Object& object) const;
 
   /**
    * Create an event of the given type.
@@ -899,6 +893,16 @@ class GD_CORE_API Project {
       const EventsFunctionsExtension& eventsFunctionExtension,
       std::size_t position);
 
+  /**
+   * \brief Unserialize and insert in the project the extensions.
+   *
+   * Unserialization is done in two passe to allow dependencies between extensions.
+   *
+   * \note If an extension with the same name already exists, it will be overwritten.
+   */
+  void UnserializeAndInsertExtensionsFrom(
+      const gd::SerializerElement& eventsFunctionsExtensionsElement);
+
   /**
    * \brief Delete the events functions extension named "name".
    */
@@ -990,16 +994,12 @@ class GD_CORE_API Project {
   /**
    * \brief return the objects of the project.
    */
-  gd::ObjectsContainer& GetObjects() {
-    return objectsContainer;
-  }
+  gd::ObjectsContainer& GetObjects() { return objectsContainer; }
 
   /**
    * \brief Return the objects of the project.
    */
-  const gd::ObjectsContainer& GetObjects() const {
-    return objectsContainer;
-  }
+  const gd::ObjectsContainer& GetObjects() const { return objectsContainer; }
   ///@}
 
   /** \name Identifier names
@@ -1080,32 +1080,53 @@ class GD_CORE_API Project {
    */
   void Init(const gd::Project& project);
 
-  gd::String name;            ///< Game name
-  gd::String description;     ///< Game description
-  gd::String version;         ///< Game version number (used for some exports)
-  unsigned int windowWidth;   ///< Window default width
-  unsigned int windowHeight;  ///< Window default height
-  int maxFPS;                 ///< Maximum Frame Per Seconds, -1 for unlimited
-  unsigned int minFPS;  ///< Minimum Frame Per Seconds ( slow down game if FPS
-                        ///< are below this number )
-  bool verticalSync;    ///< If true, must activate vertical synchronization.
+  /**
+   * @brief Get the project extensions names in the order they have to be
+   * unserialized.
+   *
+   * Child-objects need the event-based objects they use to be loaded completely
+   * before they are unserialized.
+   */
+  std::vector<gd::String> GetUnserializingOrderExtensionNames(
+      const gd::SerializerElement& eventsFunctionsExtensionsElement);
+
+  /**
+   * Create an object configuration of the given type.
+   *
+   * \param type The type of the object
+   */
+  std::unique_ptr<gd::ObjectConfiguration> CreateObjectConfiguration(
+      const gd::String& type) const;
+
+  gd::String name;         ///< Game name
+  gd::String description;  ///< Game description
+  gd::String version;      ///< Game version number (used for some exports)
+  unsigned int windowWidth = 0;   ///< Window default width
+  unsigned int windowHeight = 0;  ///< Window default height
+  int maxFPS = 0;           ///< Maximum Frame Per Seconds, -1 for unlimited
+  unsigned int minFPS = 0;  ///< Minimum Frame Per Seconds ( slow down game if
+                            ///< FPS are below this number )
+  bool verticalSync =
+      false;  ///< If true, must activate vertical synchronization.
   gd::String scaleMode;
-  bool pixelsRounding;  ///< If true, the rendering should stop pixel
-                        ///< interpolation of rendered objects.
-  bool adaptGameResolutionAtRuntime;  ///< Should the game resolution be adapted
-                                      ///< to the window size at runtime
+  bool pixelsRounding = false;  ///< If true, the rendering should stop pixel
+                                ///< interpolation of rendered objects.
+  bool adaptGameResolutionAtRuntime =
+      true;  ///< Should the game resolution be adapted
+             ///< to the window size at runtime
   gd::String
       sizeOnStartupMode;  ///< How to adapt the game size to the screen. Can be
                           ///< "adaptWidth", "adaptHeight" or empty
   gd::String antialiasingMode;
-  bool isAntialisingEnabledOnMobile;
+  bool isAntialisingEnabledOnMobile = false;
   gd::String projectUuid;  ///< UUID useful to identify the game in online
                            ///< services or database that would require it.
-  bool useDeprecatedZeroAsDefaultZOrder;  ///< If true, objects created from
-                                          ///< events will have 0 as Z order,
-                                          ///< instead of the highest Z order
-                                          ///< found on the layer at the scene
-                                          ///< startup.
+  bool useDeprecatedZeroAsDefaultZOrder =
+      false;  ///< If true, objects created from
+              ///< events will have 0 as Z order,
+              ///< instead of the highest Z order
+              ///< found on the layer at the scene
+              ///< startup.
   std::vector<std::unique_ptr<gd::Layout> > scenes;  ///< List of all scenes
   gd::VariablesContainer variables;  ///< Initial global variables
   gd::ObjectsContainer objectsContainer;
@@ -1118,7 +1139,8 @@ class GD_CORE_API Project {
   std::vector<gd::Platform*>
       platforms;  ///< Pointers to the platforms this project supports.
   gd::String firstLayout;
-  bool useExternalSourceFiles;  ///< True if game used external source files.
+  bool useExternalSourceFiles =
+      false;  ///< True if game used external source files.
   std::vector<std::unique_ptr<gd::SourceFile> >
       externalSourceFiles;  ///< List of external source files used.
   gd::String author;        ///< Game author name, for publishing purpose.
@@ -1127,35 +1149,40 @@ class GD_CORE_API Project {
   std::vector<gd::String>
       authorUsernames;  ///< Game author usernames, from GDevelop users DB.
   std::vector<gd::String> categories;  ///< Game categories
-  bool isPlayableWithKeyboard;  ///< The project is playable with a keyboard.
-  bool isPlayableWithGamepad;   ///< The project is playable with a gamepad.
-  bool isPlayableWithMobile;    ///< The project is playable on a mobile.
-  gd::String packageName;       ///< Game package name
+  bool isPlayableWithKeyboard =
+      false;  ///< The project is playable with a keyboard.
+  bool isPlayableWithGamepad =
+      false;  ///< The project is playable with a gamepad.
+  bool isPlayableWithMobile = false;  ///< The project is playable on a mobile.
+  gd::String packageName;             ///< Game package name
   gd::String templateSlug;  ///< The slug of the template from which the game is
                             ///< created.
   gd::String orientation;   ///< Lock game orientation (on mobile devices).
                             ///< "default", "landscape" or "portrait".
-  bool
-      folderProject;  ///< True if folder project, false if single file project.
+  bool folderProject =
+      false;  ///< True if folder project, false if single file project.
   gd::String
       projectFile;  ///< Path to the project file - when editing a local file.
   gd::String latestCompilationDirectory;
-  gd::Platform*
-      currentPlatform;  ///< The platform being used to edit the project.
+  gd::Platform* currentPlatform =
+      nullptr;  ///< The platform being used to edit the project.
   gd::PlatformSpecificAssets platformSpecificAssets;
   gd::LoadingScreen loadingScreen;
   gd::Watermark watermark;
   std::vector<std::unique_ptr<gd::ExternalEvents> >
       externalEvents;  ///< List of all externals events
   ExtensionProperties
-      extensionProperties;              ///< The properties of the extensions.
+      extensionProperties;  ///< The properties of the extensions.
   gd::WholeProjectDiagnosticReport wholeProjectDiagnosticReport;
-  mutable unsigned int gdMajorVersion;  ///< The GD major version used the last
-                                        ///< time the project was saved.
-  mutable unsigned int gdMinorVersion;  ///< The GD minor version used the last
-                                        ///< time the project was saved.
-  mutable unsigned int gdBuildVersion;  ///< The GD build version used the last
-                                        ///< time the project was saved.
+  mutable unsigned int gdMajorVersion =
+      0;  ///< The GD major version used the last
+          ///< time the project was saved.
+  mutable unsigned int gdMinorVersion =
+      0;  ///< The GD minor version used the last
+          ///< time the project was saved.
+  mutable unsigned int gdBuildVersion =
+      0;  ///< The GD build version used the last
+          ///< time the project was saved.
 };
 
 }  // namespace gd

Core/GDCore/Project/ProjectScopedContainers.cpp

@@ -4,12 +4,55 @@
 #include "GDCore/Project/EventsFunctionsExtension.h"
 #include "GDCore/Project/EventsBasedBehavior.h"
 #include "GDCore/Project/EventsBasedObject.h"
+#include "GDCore/Project/Layout.h"
 #include "GDCore/Project/ObjectsContainer.h"
+#include "GDCore/Project/Project.h"
 #include "GDCore/Events/Event.h"
 #include "GDCore/Extensions/PlatformExtension.h"
 
 namespace gd {
 
+ProjectScopedContainers
+ProjectScopedContainers::MakeNewProjectScopedContainersForProjectAndLayout(
+    const gd::Project &project, const gd::Layout &layout) {
+  ProjectScopedContainers projectScopedContainers(
+      ObjectsContainersList::MakeNewObjectsContainersListForProjectAndLayout(
+          project, layout),
+      VariablesContainersList::
+          MakeNewVariablesContainersListForProjectAndLayout(project, layout),
+      &project.GetVariables(), &layout.GetVariables(),
+      PropertiesContainersList::MakeNewEmptyPropertiesContainersList());
+
+  return projectScopedContainers;
+}
+
+ProjectScopedContainers
+ProjectScopedContainers::MakeNewProjectScopedContainersForProject(
+    const gd::Project &project) {
+  ProjectScopedContainers projectScopedContainers(
+      ObjectsContainersList::MakeNewObjectsContainersListForProject(project),
+      VariablesContainersList::MakeNewVariablesContainersListForProject(
+          project),
+      &project.GetVariables(), nullptr,
+      PropertiesContainersList::MakeNewEmptyPropertiesContainersList());
+
+  return projectScopedContainers;
+}
+
+ProjectScopedContainers
+ProjectScopedContainers::MakeNewProjectScopedContainersFor(
+    const gd::ObjectsContainer &globalObjectsContainers,
+    const gd::ObjectsContainer &objectsContainers) {
+  ProjectScopedContainers projectScopedContainers(
+      ObjectsContainersList::MakeNewObjectsContainersListForContainers(
+          globalObjectsContainers, objectsContainers),
+      VariablesContainersList::MakeNewEmptyVariablesContainersList(),
+      nullptr, nullptr,
+      PropertiesContainersList::MakeNewEmptyPropertiesContainersList());
+
+  return projectScopedContainers;
+};
+
 ProjectScopedContainers
 ProjectScopedContainers::MakeNewProjectScopedContainersForEventsFunctionsExtension(
     const gd::Project &project, const gd::EventsFunctionsExtension &eventsFunctionsExtension) {
@@ -18,6 +61,8 @@ ProjectScopedContainers::MakeNewProjectScopedContainersForEventsFunctionsExtensi
       ObjectsContainersList::MakeNewEmptyObjectsContainersList(),
       VariablesContainersList::
           MakeNewVariablesContainersListForEventsFunctionsExtension(eventsFunctionsExtension),
+      &eventsFunctionsExtension.GetGlobalVariables(),
+      &eventsFunctionsExtension.GetSceneVariables(),
       PropertiesContainersList::MakeNewEmptyPropertiesContainersList());
 
   return projectScopedContainers;
@@ -37,6 +82,8 @@ ProjectScopedContainers::MakeNewProjectScopedContainersForFreeEventsFunction(
           parameterObjectsContainer),
       VariablesContainersList::
           MakeNewVariablesContainersListForEventsFunctionsExtension(eventsFunctionsExtension),
+      &eventsFunctionsExtension.GetGlobalVariables(),
+      &eventsFunctionsExtension.GetSceneVariables(),
       PropertiesContainersList::MakeNewEmptyPropertiesContainersList());
 
   projectScopedContainers.AddParameters(
@@ -63,6 +110,8 @@ ProjectScopedContainers::MakeNewProjectScopedContainersForBehaviorEventsFunction
           parameterObjectsContainer),
       VariablesContainersList::
           MakeNewVariablesContainersListForEventsFunctionsExtension(eventsFunctionsExtension),
+      &eventsFunctionsExtension.GetGlobalVariables(),
+      &eventsFunctionsExtension.GetSceneVariables(),
       PropertiesContainersList::MakeNewEmptyPropertiesContainersList());
 
   projectScopedContainers.AddPropertiesContainer(
@@ -87,11 +136,14 @@ ProjectScopedContainers::MakeNewProjectScopedContainersForObjectEventsFunction(
       project, eventsBasedObject, eventsFunction, parameterObjectsContainer);
 
   ProjectScopedContainers projectScopedContainers(
-      ObjectsContainersList::MakeNewObjectsContainersListForContainer(
+      ObjectsContainersList::MakeNewObjectsContainersListForContainers(
+          eventsBasedObject.GetObjects(),
           parameterObjectsContainer),
       VariablesContainersList::
           MakeNewVariablesContainersListForEventsFunctionsExtension(
               eventsFunctionsExtension),
+      &eventsFunctionsExtension.GetGlobalVariables(),
+      &eventsFunctionsExtension.GetSceneVariables(),
       PropertiesContainersList::MakeNewEmptyPropertiesContainersList());
 
   projectScopedContainers.AddPropertiesContainer(
@@ -109,22 +161,34 @@ ProjectScopedContainers::MakeNewProjectScopedContainersForEventsBasedObject(
     const gd::EventsBasedObject &eventsBasedObject,
     gd::ObjectsContainer &outputObjectsContainer) {
 
+  // TODO: We should avoid to use a single `outputObjectsContainer` and instead
+  // use multiple, stable objects container pointed by the `ProjectScopedContainers`
+  // created below.
+  // Search for "ProjectScopedContainers wrongly containing temporary objects containers or objects"
+  // in the codebase.
   outputObjectsContainer.GetObjects().clear();
   outputObjectsContainer.GetObjectGroups().Clear();
+
+  // This object named "Object" represents the parent and is used by events.
+  // TODO: Use a dedicated `ObjectsContainer` with only this "Object" and check in
+  // the codebase that this container is not assumed as a
+  // "globalObjectsContainer".
+  // Search for "ProjectScopedContainers wrongly containing temporary objects containers or objects"
+  // in the codebase.
   outputObjectsContainer.InsertNewObject(
       project,
       gd::PlatformExtension::GetObjectFullType(
           eventsFunctionsExtension.GetName(), eventsBasedObject.GetName()),
       "Object", outputObjectsContainer.GetObjectsCount());
-  gd::EventsFunctionTools::CopyEventsBasedObjectChildrenToObjectsContainer(
-      eventsBasedObject, outputObjectsContainer);
 
   ProjectScopedContainers projectScopedContainers(
-      ObjectsContainersList::MakeNewObjectsContainersListForContainer(
-          outputObjectsContainer),
+      ObjectsContainersList::MakeNewObjectsContainersListForContainers(
+          eventsBasedObject.GetObjects(), outputObjectsContainer),
       VariablesContainersList::
           MakeNewVariablesContainersListForEventsFunctionsExtension(
               eventsFunctionsExtension),
+      &eventsFunctionsExtension.GetGlobalVariables(),
+      &eventsFunctionsExtension.GetSceneVariables(),
       PropertiesContainersList::MakeNewEmptyPropertiesContainersList());
 
   projectScopedContainers.AddPropertiesContainer(

Core/GDCore/Project/ProjectScopedContainers.h

@@ -5,13 +5,11 @@
 #include "ObjectsContainersList.h"
 #include "PropertiesContainersList.h"
 #include "VariablesContainersList.h"
+#include "VariablesContainer.h"
 
 namespace gd {
 class Project;
 class ObjectsContainer;
-class ObjectsContainersList;
-class VariablesContainersList;
-class PropertiesContainersList;
 class NamedPropertyDescriptor;
 class ParameterMetadataContainer;
 class BaseEvent;
@@ -19,7 +17,7 @@ class EventsFunctionsExtension;
 class EventsFunction;
 class EventsBasedBehavior;
 class EventsBasedObject;
-}  // namespace gd
+} // namespace gd
 
 namespace gd {
 
@@ -38,51 +36,29 @@ class ProjectScopedContainers {
   ProjectScopedContainers(
       const gd::ObjectsContainersList &objectsContainersList_,
       const gd::VariablesContainersList &variablesContainersList_,
+      const gd::VariablesContainer *legacyGlobalVariables_,
+      const gd::VariablesContainer *legacySceneVariables_,
       const gd::PropertiesContainersList &propertiesContainersList_)
       : objectsContainersList(objectsContainersList_),
         variablesContainersList(variablesContainersList_),
+        legacyGlobalVariables(legacyGlobalVariables_),
+        legacySceneVariables(legacySceneVariables_),
         propertiesContainersList(propertiesContainersList_){};
   virtual ~ProjectScopedContainers(){};
 
   static ProjectScopedContainers
   MakeNewProjectScopedContainersForProjectAndLayout(const gd::Project &project,
-                                                    const gd::Layout &layout) {
-    ProjectScopedContainers projectScopedContainers(
-        ObjectsContainersList::MakeNewObjectsContainersListForProjectAndLayout(
-            project, layout),
-        VariablesContainersList::
-            MakeNewVariablesContainersListForProjectAndLayout(project, layout),
-        PropertiesContainersList::MakeNewEmptyPropertiesContainersList());
-
-    return projectScopedContainers;
-  }
+                                                    const gd::Layout &layout);
 
   static ProjectScopedContainers
-  MakeNewProjectScopedContainersForProject(const gd::Project &project) {
-    ProjectScopedContainers projectScopedContainers(
-        ObjectsContainersList::MakeNewObjectsContainersListForProject(
-            project),
-        VariablesContainersList::
-            MakeNewVariablesContainersListForProject(project),
-        PropertiesContainersList::MakeNewEmptyPropertiesContainersList());
-
-    return projectScopedContainers;
-  }
+  MakeNewProjectScopedContainersForProject(const gd::Project &project);
 
   /**
    * @deprecated Use another method for an explicit context instead.
    */
   static ProjectScopedContainers MakeNewProjectScopedContainersFor(
       const gd::ObjectsContainer &globalObjectsContainers,
-      const gd::ObjectsContainer &objectsContainers) {
-    ProjectScopedContainers projectScopedContainers(
-        ObjectsContainersList::MakeNewObjectsContainersListForContainers(
-            globalObjectsContainers, objectsContainers),
-        VariablesContainersList::MakeNewEmptyVariablesContainersList(),
-        PropertiesContainersList::MakeNewEmptyPropertiesContainersList());
-
-    return projectScopedContainers;
-  };
+      const gd::ObjectsContainer &objectsContainers);
 
   static ProjectScopedContainers
   MakeNewProjectScopedContainersForEventsFunctionsExtension(
@@ -221,6 +197,24 @@ class ProjectScopedContainers {
     return variablesContainersList;
   };
 
+  /**
+   * @brief Return the global variables of the current scene or the current
+   * extension. It allows legacy "globalvar" parameters to accept extension
+   * variables.
+   */
+  const gd::VariablesContainer *GetLegacyGlobalVariables() const {
+    return legacyGlobalVariables;
+  };
+
+  /**
+   * @brief Return the scene variables of the current scene or the current
+   * extension. It allows legacy "scenevar" parameters to accept extension
+   * variables.
+   */
+  const gd::VariablesContainer *GetLegacySceneVariables() const {
+    return legacySceneVariables;
+  };
+
   const gd::PropertiesContainersList &GetPropertiesContainersList() const {
     return propertiesContainersList;
   };
@@ -231,11 +225,14 @@ class ProjectScopedContainers {
 
   /** Do not use - should be private but accessible to let Emscripten create a
    * temporary. */
-  ProjectScopedContainers(){};
+  ProjectScopedContainers()
+      : legacyGlobalVariables(nullptr), legacySceneVariables(nullptr){};
 
- private:
+private:
   gd::ObjectsContainersList objectsContainersList;
   gd::VariablesContainersList variablesContainersList;
+  const gd::VariablesContainer *legacyGlobalVariables;
+  const gd::VariablesContainer *legacySceneVariables;
   gd::PropertiesContainersList propertiesContainersList;
   std::vector<const ParameterMetadataContainer *> parametersVectorsList;
 };

Core/GDCore/Project/PropertyDescriptor.h

@@ -33,6 +33,7 @@ class GD_CORE_API PropertyDescriptor {
   PropertyDescriptor(gd::String propertyValue)
       : currentValue(propertyValue), type("string"), label(""), hidden(false),
         deprecated(false), advanced(false),
+        hasImpactOnOtherProperties(false),
         measurementUnit(gd::MeasurementUnit::GetUndefined()),
         quickCustomizationVisibility(QuickCustomization::Visibility::Default) {}
 
@@ -41,6 +42,7 @@ class GD_CORE_API PropertyDescriptor {
    */
   PropertyDescriptor()
       : hidden(false), deprecated(false), advanced(false),
+        hasImpactOnOtherProperties(false),
         measurementUnit(gd::MeasurementUnit::GetUndefined()),
         quickCustomizationVisibility(QuickCustomization::Visibility::Default){};
 
@@ -175,6 +177,21 @@ class GD_CORE_API PropertyDescriptor {
    */
   bool IsAdvanced() const { return advanced; }
 
+  /**
+   * \brief Check if the property has impact on other properties - which means a change
+   * must re-render other properties.
+   */
+  bool HasImpactOnOtherProperties() const { return hasImpactOnOtherProperties; }
+
+  /**
+   * \brief Set if the property has impact on other properties - which means a change
+   * must re-render other properties.
+   */
+  PropertyDescriptor& SetHasImpactOnOtherProperties(bool enable) {
+    hasImpactOnOtherProperties = enable;
+    return *this;
+  }
+
   QuickCustomization::Visibility GetQuickCustomizationVisibility() const { return quickCustomizationVisibility; }
 
   PropertyDescriptor& SetQuickCustomizationVisibility(QuickCustomization::Visibility visibility) {
@@ -221,6 +238,7 @@ class GD_CORE_API PropertyDescriptor {
   bool hidden;
   bool deprecated;
   bool advanced;
+  bool hasImpactOnOtherProperties;
   gd::MeasurementUnit measurementUnit; //< The unit of measurement of the property vale.
   QuickCustomization::Visibility quickCustomizationVisibility;
 };

Core/GDCore/Project/QuickCustomization.h

@@ -1,16 +1,37 @@
 #pragma once
 
+#include "GDCore/String.h"
+
 namespace gd {
 class QuickCustomization {
  public:
   enum Visibility {
-    /** Visibility based on the parent or editor heuristics (probably visible). */
+    /** Visibility based on the parent or editor heuristics (probably visible).
+     */
     Default,
     /** Visible in the quick customization editor. */
     Visible,
     /** Not visible in the quick customization editor. */
     Hidden
   };
+
+  static Visibility StringAsVisibility(const gd::String& str) {
+    if (str == "visible")
+      return Visibility::Visible;
+    else if (str == "hidden")
+      return Visibility::Hidden;
+
+    return Visibility::Default;
+  }
+
+  static gd::String VisibilityAsString(Visibility visibility) {
+    if (visibility == Visibility::Visible)
+      return "visible";
+    else if (visibility == Visibility::Hidden)
+      return "hidden";
+
+    return "default";
+  }
 };
 
 }  // namespace gd

Core/GDCore/Project/QuickCustomizationVisibilitiesContainer.cpp

@@ -0,0 +1,58 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#include "GDCore/Project/QuickCustomizationVisibilitiesContainer.h"
+
+#include <algorithm>
+#include <iostream>
+
+#include "GDCore/Project/QuickCustomization.h"
+#include "GDCore/Serialization/SerializerElement.h"
+#include "GDCore/String.h"
+#include "GDCore/Tools/UUID/UUID.h"
+
+using namespace std;
+
+namespace gd {
+
+QuickCustomizationVisibilitiesContainer::
+    QuickCustomizationVisibilitiesContainer() {}
+
+bool QuickCustomizationVisibilitiesContainer::IsEmpty() const {
+  return visibilities.empty();
+}
+
+void QuickCustomizationVisibilitiesContainer::Set(
+    const gd::String& name, QuickCustomization::Visibility visibility) {
+  visibilities[name] = visibility;
+}
+
+QuickCustomization::Visibility QuickCustomizationVisibilitiesContainer::Get(
+    const gd::String& name) const {
+  auto it = visibilities.find(name);
+  if (it != visibilities.end()) return it->second;
+
+  return QuickCustomization::Visibility::Default;
+}
+
+void QuickCustomizationVisibilitiesContainer::SerializeTo(
+    SerializerElement& element) const {
+  for (auto& visibility : visibilities) {
+    element.SetStringAttribute(
+        visibility.first,
+        QuickCustomization::VisibilityAsString(visibility.second));
+  }
+}
+
+void QuickCustomizationVisibilitiesContainer::UnserializeFrom(
+    const SerializerElement& element) {
+  visibilities.clear();
+  for (auto& child : element.GetAllChildren()) {
+    visibilities[child.first] =
+        QuickCustomization::StringAsVisibility(child.second->GetStringValue());
+  }
+}
+
+}  // namespace gd

Core/GDCore/Project/QuickCustomizationVisibilitiesContainer.h

@@ -0,0 +1,29 @@
+#pragma once
+#include <memory>
+#include <vector>
+
+#include "GDCore/Project/QuickCustomization.h"
+#include "GDCore/Serialization/SerializerElement.h"
+#include "GDCore/String.h"
+
+namespace gd {
+
+class QuickCustomizationVisibilitiesContainer {
+ public:
+  QuickCustomizationVisibilitiesContainer();
+
+  void Set(const gd::String& name, QuickCustomization::Visibility visibility);
+
+  QuickCustomization::Visibility Get(const gd::String& name) const;
+
+  bool IsEmpty() const;
+
+  void SerializeTo(SerializerElement& element) const;
+
+  void UnserializeFrom(const SerializerElement& element);
+
+ private:
+  std::map<gd::String, QuickCustomization::Visibility> visibilities;
+};
+
+}  // namespace gd

Core/GDCore/Project/ResourcesManager.cpp

@@ -173,9 +173,6 @@ std::map<gd::String, gd::PropertyDescriptor> ImageResource::GetProperties()
   properties[_("Smooth the image")]
       .SetValue(smooth ? "true" : "false")
       .SetType("Boolean");
-  properties[_("Always loaded in memory")]
-      .SetValue(alwaysLoaded ? "true" : "false")
-      .SetType("Boolean");
 
   return properties;
 }
@@ -184,8 +181,6 @@ bool ImageResource::UpdateProperty(const gd::String& name,
                                    const gd::String& value) {
   if (name == _("Smooth the image"))
     smooth = value == "1";
-  else if (name == _("Always loaded in memory"))
-    alwaysLoaded = value == "1";
 
   return true;
 }
@@ -569,14 +564,12 @@ void ImageResource::SetFile(const gd::String& newFile) {
 }
 
 void ImageResource::UnserializeFrom(const SerializerElement& element) {
-  alwaysLoaded = element.GetBoolAttribute("alwaysLoaded");
   smooth = element.GetBoolAttribute("smoothed");
   SetUserAdded(element.GetBoolAttribute("userAdded"));
   SetFile(element.GetStringAttribute("file"));
 }
 
 void ImageResource::SerializeTo(SerializerElement& element) const {
-  element.SetAttribute("alwaysLoaded", alwaysLoaded);
   element.SetAttribute("smoothed", smooth);
   element.SetAttribute("userAdded", IsUserAdded());
   element.SetAttribute("file", GetFile());