Code sign even for pull request for testing

* Don't show in changelog

.circleci/config.yml

@@ -64,7 +64,7 @@ jobs:
       # Note: Code signing is done using CSC_LINK (see https://www.electron.build/code-signing).
       - run:
           name: Build GDevelop IDE
-          command: export NODE_OPTIONS="--max-old-space-size=7168" && cd newIDE/electron-app && npm run build -- --mac --publish=never
+          command: export NODE_OPTIONS="--max-old-space-size=7168" && cd newIDE/electron-app && CSC_FOR_PULL_REQUEST=true npm run build -- --mac --publish=never
 
       - run:
           name: Clean dist folder to keep only installers/binaries.

.devcontainer/Dockerfile

@@ -1,6 +0,0 @@
-# This is the Dockerfile to create a "devcontainer". 
-# This is a way to quickly create a development environment,
-# that can be used with GitHub workspaces.
-
-# See here for image contents: https://github.com/microsoft/vscode-dev-containers/tree/v0.162.0/containers/codespaces-linux/.devcontainer/base.Dockerfile
-FROM mcr.microsoft.com/vscode/devcontainers/universal:1-focal

.devcontainer/README.md

@@ -1,16 +0,0 @@
-# Devcontainer (development environment in the cloud) for GDevelop (beta)
-
-A devcontainer is the configuration to run a cloud development environment, available remotely.
-This is notably used to run a **[GitHub Codespace](https://docs.github.com/en/github/developing-online-with-codespaces/about-codespaces)**. The advantage is that you can quickly experiment and do changes without installing anything on your computer.
-
-> ⚠️ This development environment is in beta, and not everything is supported. This is useful for playing a bit with GDevelop codebase or to make quick changes. **In particular, it's not possible to test your changes on GDJS** because only the web-app can be launched.
-
-It's recommended that you follow the usual [README](../newIDE/README.md) to get started, with development tools installed on your computer.
-
-## Start a GitHub workspace to work on GDevelop (beta)
-
-- Subscribe to the [beta edition of GitHub workspace](https://docs.github.com/en/github/developing-online-with-codespaces/about-codespaces#joining-the-beta).
-- In the repository GitHub page, click **Code** and then choose **Open with Codespaces**.
-- Wait for the Codespace to load and Visual Studio Code to open.
-- When it's ready, open a terminal in Visual Studio Code.
-- Follow the usual [README in `newIDE`](../newIDE/README.md) to get started, like you would do on your own computer.

.devcontainer/devcontainer.json

@@ -1,51 +0,0 @@
-// For format details, see https://aka.ms/devcontainer.json. For config options, see the README at:
-// https://github.com/microsoft/vscode-dev-containers/tree/v0.162.0/containers/codespaces-linux
-{
-	"name": "GitHub Codespaces for GDevelop",
-	"build": {
-		"dockerfile": "Dockerfile"
-	},
-	"settings": {
-		"terminal.integrated.shell.linux": "/bin/zsh",
-		"go.toolsManagement.checkForUpdates": "off",
-		"go.useLanguageServer": true,
-		"go.gopath": "/go",
-		"go.goroot": "/usr/local/go",
-		"python.pythonPath": "/opt/python/latest/bin/python",
-		"python.linting.enabled": true,
-		"python.linting.pylintEnabled": true,
-		"python.formatting.autopep8Path": "/usr/local/py-utils/bin/autopep8",
-		"python.formatting.blackPath": "/usr/local/py-utils/bin/black",
-		"python.formatting.yapfPath": "/usr/local/py-utils/bin/yapf",
-		"python.linting.banditPath": "/usr/local/py-utils/bin/bandit",
-		"python.linting.flake8Path": "/usr/local/py-utils/bin/flake8",
-		"python.linting.mypyPath": "/usr/local/py-utils/bin/mypy",
-		"python.linting.pycodestylePath": "/usr/local/py-utils/bin/pycodestyle",
-		"python.linting.pydocstylePath": "/usr/local/py-utils/bin/pydocstyle",
-		"python.linting.pylintPath": "/usr/local/py-utils/bin/pylint",
-		"lldb.executable": "/usr/bin/lldb",
-		"files.watcherExclude": {
-			"**/target/**": true
-		}
-	},
-	"remoteUser": "codespace",
-	"overrideCommand": false,
-	"workspaceMount": "source=${localWorkspaceFolder},target=/home/codespace/workspace,type=bind,consistency=cached",
-	"workspaceFolder": "/home/codespace/workspace",
-	"runArgs": [ "--cap-add=SYS_PTRACE", "--security-opt", "seccomp=unconfined", "--privileged", "--init" ],
-
-	// Add the IDs of extensions you want installed when the container is created.
-	"extensions": [
-		"GitHub.vscode-pull-request-github",
-		"esbenp.prettier-vscode",
-		"ms-vscode.cpptools",
-		"xaver.clang-format",
-		"flowtype.flow-for-vscode"
-	],
-
-	// Use 'forwardPorts' to make a list of ports inside the container available locally.
-	// "forwardPorts": [],
-
-	// "oryx build" will automatically install your dependencies and attempt to build your project
-	"postCreateCommand": "oryx build -p virtualenv_name=.venv || echo 'Could not auto-build. Skipping.'"
-}

.github/ISSUE_TEMPLATE/--bug-report.md

@@ -1,28 +0,0 @@
----
-name: "\U0001F41BBug report"
-about: Create a bug report about GDevelop or the game engine
-title: ''
-labels: ''
-assignees: ''
-
----
-
-## Describe the bug
-A clear and concise description of what the bug is.
-
-Please double check that the bug is not already reported in the issues list.
-
-## To Reproduce
-Steps to reproduce the behavior:
-1. Go to '...'
-2. Click on '....'
-3. Scroll down to '....'
-4. See error
-
-* Please include a link to a game if possible!
-* If applicable, add screenshots to help explain your problem.
-
-## Other details
-* Include any OS/browser version/smartphone that you're using
-* Which version of GDevelop are you using? The desktop app or the web-app?
-* Add any other context about the problem here.

.github/ISSUE_TEMPLATE/--bug-report.yml

@@ -0,0 +1,71 @@
+name: 🐛Bug report
+description: Create a bug report about GDevelop or the game engine
+body:
+  - type: checkboxes
+    attributes:
+      label: Is there an existing issue for this?
+      options:
+      - label: I have searched the [existing issues](https://github.com/4ian/GDevelop/issues)
+        required: true
+  - type: textarea
+    attributes:
+      label: Describe the bug
+      description: A clear and concise description of what the bug is.
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Steps to reproduce
+      description: |
+        * Please include a link to a game if possible!
+        * If applicable, add screenshots to help explain your problem.
+      placeholder: |
+        1. Go to '...'
+        2. Click on '...'
+        3. Scroll down to '...'
+        4. See error
+    validations:
+      required: true
+  - type: dropdown
+    attributes:
+      label: GDevelop platform
+      description: Which platform of GDevelop are you using?
+      multiple: true
+      options:
+        - Desktop
+        - Web
+        - Mobile
+    validations:
+      required: true
+  - type: input
+    attributes:
+      label: GDevelop version
+      description: |
+        Which version of GDevelop are you using?
+        Take a look here: [Editor Home - About GDevelop - "This version of GDevelop is: ~~~"]
+      placeholder: 5.1.159? 5.1.160?
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Platform info
+      value: |
+        <details>
+
+        *OS (e.g. Windows, Linux, macOS, Android, iOS)*
+        >
+
+        *OS Version (e.g. Windows 10, macOS 10.15)*
+        >
+
+        *Browser(For Web) (e.g. Chrome, Firefox, Safari)*
+        >
+
+        *Device(For Mobile) (e.g. iPhone 12, Samsung Galaxy S21)*
+        >
+
+        </details>
+  - type: textarea
+    attributes:
+      label: Additional context
+      description: Add any other context about the problem here.

.github/workflows/build-storybook.yml

@@ -17,27 +17,23 @@ jobs:
   build-storybook:
     runs-on: ubuntu-latest
     steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 50
+
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 16
+          cache: 'npm'
+          cache-dependency-path: 'newIDE/app/package-lock.json'
+
       - name: Configure AWS Credentials
-        uses: aws-actions/configure-aws-credentials@v1
+        uses: aws-actions/configure-aws-credentials@v2
         with:
           aws-access-key-id: ${{ secrets.BUILD_STORYBOOK_AWS_ACCESS_KEY_ID }}
           aws-secret-access-key: ${{ secrets.BUILD_STORYBOOK_AWS_SECRET_ACCESS_KEY }}
           aws-region: us-east-1
 
-      - uses: actions/checkout@v2
-        with:
-          fetch-depth: 50
-
-      # Cache npm dependencies to speed up the workflow
-      - name: Cache node modules
-        uses: actions/cache@v2
-        env:
-          cache-name: cache-newIDE-app-node_modules
-        with:
-          # npm cache files are stored in `~/.npm` on Linux/macOS
-          path: ~/.npm
-          key: ${{ runner.os }}-${{ env.cache-name }}-${{ hashFiles('newIDE/app/package-lock.json') }}
-
       - name: Install newIDE dependencies
         run: npm install
         working-directory: newIDE/app
@@ -57,8 +53,8 @@ jobs:
 
       - name: Log urls to the Storybook
         run: |
-          echo "Find the latest Storybook for this branch on http://gdevelop-storybook.s3-website-us-east-1.amazonaws.com/$(git rev-parse --abbrev-ref HEAD)/latest/index.html"
-          echo "Find the Storybook for this commit on http://gdevelop-storybook.s3-website-us-east-1.amazonaws.com/$(git rev-parse --abbrev-ref HEAD)/commit/$(git rev-parse HEAD)/index.html"
+          echo "Find the latest Storybook for this branch on https://gdevelop-storybook.s3.amazonaws.com/$(git rev-parse --abbrev-ref HEAD)/latest/index.html"
+          echo "Find the Storybook for this commit on https://gdevelop-storybook.s3.amazonaws.com/$(git rev-parse --abbrev-ref HEAD)/commit/$(git rev-parse HEAD)/index.html"
 
       # Publish on Chromatic, only when manually launched (too costly to run on every commit).
       - name: Publish Storybook to Chromatic

.github/workflows/extract-translations.yml

@@ -11,17 +11,12 @@ jobs:
   extract-translations:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-
-      # Cache npm dependencies to speed up the workflow
-      - name: Cache node modules
-        uses: actions/cache@v2
-        env:
-          cache-name: cache-newIDE-app-node_modules
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
         with:
-          # npm cache files are stored in `~/.npm` on Linux/macOS
-          path: ~/.npm
-          key: ${{ runner.os }}-${{ env.cache-name }}-${{ hashFiles('newIDE/app/package-lock.json') }}
+          node-version: 16
+          cache: 'npm'
+          cache-dependency-path: 'newIDE/app/package-lock.json'
 
       - name: Install gettext
         run: sudo apt update && sudo apt install gettext -y
@@ -38,7 +33,7 @@ jobs:
       - name: Install Crowdin CLI
         if: github.ref == 'refs/heads/master'
         run: npm i -g @crowdin/cli
-        
+
       - name: Upload translations to Crowdin
         run: crowdin upload sources
         if: github.ref == 'refs/heads/master'

.github/workflows/issues.yml

@@ -3,41 +3,17 @@ on:
   issues:
     types: [opened]
 jobs:
-  autoclose:
-    runs-on: ubuntu-latest
-    steps:
-    - name: Autoclose issues about adding a bug without changing the bug report template
-      uses: arkon/issue-closer-action@v1.1
-      with:
-        repo-token: ${{ secrets.GITHUB_TOKEN }}
-        type: "body"
-        regex: ".*Scroll down to '\\.\\.\\.\\.'.*"
-        message: "Hi @${issue.user.login}! 👋 This issue was automatically closed because it seems that you have not included any steps to reproduce the bug.\n\nGitHub is a place for the technical development of GDevelop itself - you may want to go on the [forum](https://forum.gdevelop.io/), the Discord chat or [read the documentation](https://wiki.gdevelop.io/gdevelop5/start) to learn more about GDevelop. Thanks!"
-    - name: Autoclose known beta 105 web-app update bug
-      uses: arkon/issue-closer-action@v1.1
-      with:
-        repo-token: ${{ secrets.GITHUB_TOKEN }}
-        type: "body"
-        regex: ".*_instance.getRawFloatProperty is not a function.*"
-        message: "Hi @${issue.user.login}! 👋 This issue was automatically closed as this seems to be a known bug. It can be solved by **closing entirely the web-app and opening it again**. This will allow the web-app to auto-update and the problem should be gone."
-    - name: Autoclose known beta 114 web-app update bug
-      uses: arkon/issue-closer-action@v1.1
-      with:
-        repo-token: ${{ secrets.GITHUB_TOKEN }}
-        type: "body"
-        regex: ".*getAssociatedSettings is not a function.*"
-        message: "Hi @${issue.user.login}! 👋 This issue was automatically closed as this seems to be a known bug. It can be solved by **closing entirely the web-app and opening it again**. This will allow the web-app to auto-update and the problem should be gone."
   autocomment:
     runs-on: ubuntu-latest
     if: contains(github.event.issue.body, 'The node to be removed is not a child of this node')
     steps:
-    - name: Autocomment indications on bug if it looks like #3453
-      uses: peter-evans/create-or-update-comment@v1
-      with:
-        issue-number: ${{ github.event.issue.number }}
-        body: |
-          Hi @${{ github.actor }}!
-          Thank you for taking the time to open an issue.
+      - name: Autocomment indications on bug if it looks like #3453
+        uses: peter-evans/create-or-update-comment@v3
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          issue-number: ${{ github.event.issue.number }}
+          body: |
+            Hi @${{ github.actor }}!
+            Thank you for taking the time to open an issue.
 
-          The solved issue #3453 mentioned a similar error, maybe it could help fix this new issue.
-        token: ${{ secrets.GITHUB_TOKEN }}
+            The solved issue #3453 mentioned a similar error, maybe it could help fix this new issue.

.github/workflows/pull-requests.yml

@@ -1,29 +1,53 @@
 name: GDevelop Issues automatic workflow
 on:
   pull_request:
-    types: [opened]
+    types: 
+      - opened
+      - reopened
+      - synchronize
 jobs:
   read-locales-metadata:
-    if: contains(github.event.pull_request.title, '[Auto PR] Update translations')
+    if: github.event.pull_request.title == '[Auto PR] Update translations'
     runs-on: ubuntu-latest
+    env:
+      COMMENT_TITLE: "Translation ratio changes"
     steps:
-    - name: Read and format locales metadata
-      run: |
-        LANS=($(git diff HEAD^ HEAD --unified=5 newIDE/app/src/locales/LocalesMetadata.js | tail +6 | grep -E "^\s+\"languageName" | sed -E "s/^ *\"languageName\": \"//g" | sed -E "s/\",//g" | sed -E "s/ /_/g"))
-        ADDS=($(git diff HEAD^ HEAD --unified=0 newIDE/app/src/locales/LocalesMetadata.js | tail +6 | grep -E "^\+\s*\"translationRatio\"" | sed -E "s/^\+ *\"translationRatio\": //g"))
-        SUBS=($(git diff HEAD^ HEAD --unified=0 newIDE/app/src/locales/LocalesMetadata.js | tail +6 | grep -E "^\-\s*\"translationRatio\"" | sed -E "s/^\- *\"translationRatio\": //g"))
-        touch sumup.txt
-        for index in ${!ADDS[@]}; do
-          echo ${LANS[index]} | sed -E "s/_/ /g" >> sumup.txt
-          DELTA=$(bc <<< "scale=2;(${ADDS[index]}-${SUBS[index]})*100/1")
-          echo $DELTA % >> sumup.txt
-        done
-    - name: Store sumup in outputs
-      id: sumup
-      run: echo "::set-output name=sumupFileContent::$(cat sumup.txt)"
-    - name: Autocomment pull request with sumup
-      uses: peter-evans/create-or-update-comment@v1
-      with:
-        issue-number: ${{ github.event.number }}
-        body: ${{ steps.sumup.outputs.sumupFileContent}}
-        token: ${{ secrets.GITHUB_TOKEN }}
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - name: Read and format locales metadata
+        env:
+          BASE: ${{ github.event.pull_request.base.sha }}
+          HEAD: ${{ github.event.pull_request.head.sha }}
+        run: |
+          LANS=($(git diff $BASE...$HEAD -- newIDE/app/src/locales/LocalesMetadata.js | grep -E "^\s+\"languageName" | sed -E "s/^ *\"languageName\": \"//g" | sed -E "s/\",//g" | sed -E "s/ /_/g"))
+          ADDS=($(git diff $BASE...$HEAD -- newIDE/app/src/locales/LocalesMetadata.js | grep -E "^\+\s*\"translationRatio\"" | sed -E "s/^\+ *\"translationRatio\": //g"))
+          SUBS=($(git diff $BASE...$HEAD -- newIDE/app/src/locales/LocalesMetadata.js | grep -E "^\-\s*\"translationRatio\"" | sed -E "s/^\- *\"translationRatio\": //g"))
+          touch sumup.md
+          echo "## $COMMENT_TITLE" >> sumup.md
+          echo "" >> sumup.md
+          echo "| Language | Change |" >> sumup.md
+          echo "| --- | --- |" >> sumup.md
+          for index in ${!ADDS[@]}; do
+            DELTA=$(echo "scale=3; (${ADDS[index]} - ${SUBS[index]})*100/1" | bc)
+            if (( $(echo "$DELTA == 0" | bc -l) )); then
+              continue
+            fi
+            LANGUAGE=${LANS[index]//_/ }
+            echo "| $LANGUAGE | $(printf "%1.3f" $DELTA) % |" >> sumup.md
+          done
+      - name: Find Comment
+        uses: peter-evans/find-comment@v2
+        id: fc
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          issue-number: ${{ github.event.number }}
+          body-includes: ${{ env.COMMENT_TITLE }}
+      - name: Autocomment pull request with sumup
+        uses: peter-evans/create-or-update-comment@v3
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          issue-number: ${{ github.event.number }}
+          comment-id: ${{ steps.fc.outputs.comment-id }}
+          edit-mode: replace
+          body-path: "sumup.md"

.github/workflows/update-translations.yml

@@ -14,17 +14,12 @@ jobs:
   update-translations:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-
-      # Cache npm dependencies to speed up the workflow
-      - name: Cache node modules
-        uses: actions/cache@v2
-        env:
-          cache-name: cache-newIDE-app-node_modules
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
         with:
-          # npm cache files are stored in `~/.npm` on Linux/macOS
-          path: ~/.npm
-          key: ${{ runner.os }}-${{ env.cache-name }}-${{ hashFiles('newIDE/app/package-lock.json') }}
+          node-version: 16
+          cache: 'npm'
+          cache-dependency-path: 'newIDE/app/package-lock.json'
 
       - name: Install gettext
         run: sudo apt update && sudo apt install gettext -y
@@ -44,7 +39,7 @@ jobs:
       # (Build and) download the most recent translations (PO files) from Crowdin.
       - name: Install Crowdin CLI
         run: npm i -g @crowdin/cli
-        
+
       - name: Download new translations from Crowdin
         run: crowdin download
         env:
@@ -61,13 +56,13 @@ jobs:
         working-directory: newIDE/app
 
       - name: Create a Pull Request with the changes
-        uses: peter-evans/create-pull-request@v3.10.1
+        uses: peter-evans/create-pull-request@v5
         with:
           commit-message: Update translations [skip ci]
           branch: chore/update-translations
           delete-branch: true
-          title: '[Auto PR] Update translations'
+          title: "[Auto PR] Update translations"
           body: |
             This updates the translations by downloading them from Crowdin and compiling them for usage by the app.
-            
+
             Please double check the values in `newIDE/app/src/locales/LocalesMetadata.js` to ensure the changes are sensible.

.vscode/settings.json

@@ -127,5 +127,7 @@
     "flow.useNPMPackagedFlow": true,
 
     // Clang format styling (duplicated in scripts/CMakeClangUtils.txt)
-    "C_Cpp.clang_format_style": "{BasedOnStyle: Google, BinPackParameters: false, BinPackArguments: false}"
+    "C_Cpp.clang_format_style": "{BasedOnStyle: Google, BinPackParameters: false, BinPackArguments: false}",
+    "prettier.prettierPath": "./GDJS/node_modules/prettier",
+    "prettier.configPath": "./GDJS/.prettierrc"
 }

Binaries/README.md

@@ -1,3 +1,3 @@
 This is the directory where native or WebAssembly binaries of the C++ code of GDCore and GDJS are produced.
 
-See GDevelop.js README for the instructions to compile after a change in the C++ source code.
+See GDevelop.js README for the instructions to compile after a change in the C++ source code.

CMakeLists.txt

@@ -1,5 +1,5 @@
 #This is the CMake file used to build GDevelop.
-#For more information, see the Readme.md file.
+#For more information, see the README.md file.
 
 cmake_minimum_required(VERSION 2.6)
 cmake_policy(SET CMP0011 NEW)

Core/GDCore/Events/Builtin/CommentEvent.cpp

@@ -38,7 +38,7 @@ void CommentEvent::SerializeTo(SerializerElement &element) const {
       .SetAttribute("textB", textB);
 
   element.AddChild("comment").SetValue(com1);
-  element.AddChild("comment2").SetValue(com2);
+  if (!com2.empty()) element.AddChild("comment2").SetValue(com2);
 }
 
 void CommentEvent::UnserializeFrom(gd::Project &project,
@@ -53,7 +53,9 @@ void CommentEvent::UnserializeFrom(gd::Project &project,
   textB = colorElement.GetIntAttribute("textB");
 
   com1 = element.GetChild("comment", 0, "Com1").GetValue().GetString();
-  com2 = element.GetChild("comment2", 0, "Com2").GetValue().GetString();
+  if (element.HasChild("comment2")) {
+    com2 = element.GetChild("comment2", 0, "Com2").GetValue().GetString();
+  }
 }
 
 }  // namespace gd

Core/GDCore/Events/Builtin/GroupEvent.h

@@ -13,6 +13,7 @@
 namespace gd {
 class Instruction;
 class Project;
+class EventVisitor;
 }
 class EventsCodeGenerationContext;
 

Core/GDCore/Events/Builtin/LinkEvent.cpp

@@ -16,6 +16,7 @@
 #include "GDCore/Project/Object.h"
 #include "GDCore/Project/Project.h"
 #include "GDCore/Serialization/SerializerElement.h"
+#include "GDCore/Events/EventVisitor.h"
 
 using namespace std;
 
@@ -156,4 +157,14 @@ void LinkEvent::UnserializeFrom(gd::Project& project,
   }
 }
 
+bool LinkEvent::AcceptVisitor(gd::EventVisitor &eventVisitor) {
+  return BaseEvent::AcceptVisitor(eventVisitor) |
+         eventVisitor.VisitLinkEvent(*this);
+}
+
+void LinkEvent::AcceptVisitor(gd::ReadOnlyEventVisitor &eventVisitor) const {
+  BaseEvent::AcceptVisitor(eventVisitor);
+  eventVisitor.VisitLinkEvent(*this);
+}
+
 }  // namespace gd

Core/GDCore/Events/Builtin/LinkEvent.h

@@ -30,7 +30,7 @@ class GD_CORE_API LinkEvent : public gd::BaseEvent {
         includeEnd(gd::String::npos),
         linkWasInvalid(false){};
   virtual ~LinkEvent();
-  virtual gd::LinkEvent* Clone() const { return new LinkEvent(*this); }
+  virtual gd::LinkEvent* Clone() const override { return new LinkEvent(*this); }
 
   /**
    * Get the link target (i.e. the scene or external events the link refers to).
@@ -86,7 +86,7 @@ class GD_CORE_API LinkEvent : public gd::BaseEvent {
   /**
    * The link event must always be preprocessed.
    */
-  virtual bool MustBePreprocessed() { return true; }
+  virtual bool MustBePreprocessed() override { return true; }
 
   /**
    * \brief Get a pointer to the list of events that are targeted by the link.
@@ -107,11 +107,14 @@ class GD_CORE_API LinkEvent : public gd::BaseEvent {
                                  EventsList& eventList,
                                  std::size_t indexOfTheEventInThisList);
 
-  virtual bool IsExecutable() const { return true; };
+  virtual bool IsExecutable() const override { return true; };
 
-  virtual void SerializeTo(SerializerElement& element) const;
+  virtual void SerializeTo(SerializerElement& element) const override;
   virtual void UnserializeFrom(gd::Project& project,
-                               const SerializerElement& element);
+                               const SerializerElement& element) override;
+
+  bool AcceptVisitor(gd::EventVisitor& eventVisitor) override;
+  void AcceptVisitor(gd::ReadOnlyEventVisitor& eventVisitor) const override;
 
  private:
   gd::String

Core/GDCore/Events/CodeGeneration/EventsCodeGenerator.cpp

@@ -273,8 +273,6 @@ gd::String EventsCodeGenerator::GenerateConditionCode(
 
   if (instrInfos.codeExtraInformation.HasCustomCodeGenerator()) {
     context.EnterCustomCondition();
-    conditionCode += GenerateReferenceToUpperScopeBoolean(
-        "conditionTrue", returnBoolean, context);
     conditionCode += instrInfos.codeExtraInformation.customCodeGenerator(
         condition, *this, context);
     maxCustomConditionsDepth =
@@ -291,7 +289,7 @@ gd::String EventsCodeGenerator::GenerateConditionCode(
     condition.SetParameters(parameters);
   }
 
-  // Verify that there are no mismatchs between object type in parameters.
+  // Verify that there are no mismatches between object type in parameters.
   for (std::size_t pNb = 0; pNb < instrInfos.parameters.size(); ++pNb) {
     if (ParameterMetadata::IsObject(instrInfos.parameters[pNb].GetType())) {
       gd::String objectInParameter =
@@ -483,7 +481,7 @@ gd::String EventsCodeGenerator::GenerateActionCode(
     action.SetParameters(parameters);
   }
 
-  // Verify that there are no mismatchs between object type in parameters.
+  // Verify that there are no mismatches between object type in parameters.
   for (std::size_t pNb = 0; pNb < instrInfos.parameters.size(); ++pNb) {
     if (ParameterMetadata::IsObject(instrInfos.parameters[pNb].GetType())) {
       gd::String objectInParameter = action.GetParameter(pNb).GetPlainString();
@@ -726,7 +724,10 @@ gd::String EventsCodeGenerator::GenerateParameterCodes(
              metadata.GetType() == "fontResource" ||
              metadata.GetType() == "imageResource" ||
              metadata.GetType() == "jsonResource" ||
+             metadata.GetType() == "tilemapResource" ||
+             metadata.GetType() == "tilesetResource" ||
              metadata.GetType() == "videoResource" ||
+             metadata.GetType() == "model3DResource" ||
              // Deprecated, old parameter names:
              metadata.GetType() == "password" || metadata.GetType() == "musicfile" ||
              metadata.GetType() == "soundfile" || metadata.GetType() == "police") {
@@ -1018,15 +1019,15 @@ gd::String EventsCodeGenerator::GenerateFreeCondition(
     bool conditionInverted,
     gd::EventsCodeGenerationContext& context) {
   // Generate call
-  gd::String predicat;
+  gd::String predicate;
   if (instrInfos.codeExtraInformation.type == "number" ||
       instrInfos.codeExtraInformation.type == "string") {
-    predicat = GenerateRelationalOperatorCall(
+    predicate = GenerateRelationalOperatorCall(
         instrInfos,
         arguments,
         instrInfos.codeExtraInformation.functionCallName);
   } else {
-    predicat = instrInfos.codeExtraInformation.functionCallName + "(" +
+    predicate = instrInfos.codeExtraInformation.functionCallName + "(" +
                GenerateArgumentsList(arguments, 0) + ")";
   }
 
@@ -1039,10 +1040,10 @@ gd::String EventsCodeGenerator::GenerateFreeCondition(
       conditionAlreadyTakeCareOfInversion = true;
   }
   if (!conditionAlreadyTakeCareOfInversion && conditionInverted)
-    predicat = GenerateNegatedPredicat(predicat);
+    predicate = GenerateNegatedPredicate(predicate);
 
   // Generate condition code
-  return returnBoolean + " = " + predicat + ";\n";
+  return returnBoolean + " = " + predicate + ";\n";
 }
 
 gd::String EventsCodeGenerator::GenerateObjectCondition(
@@ -1064,18 +1065,18 @@ gd::String EventsCodeGenerator::GenerateObjectCondition(
                 instrInfos.codeExtraInformation.functionCallName;
 
   // Create call
-  gd::String predicat;
+  gd::String predicate;
   if ((instrInfos.codeExtraInformation.type == "number" ||
        instrInfos.codeExtraInformation.type == "string")) {
-    predicat = GenerateRelationalOperatorCall(
+    predicate = GenerateRelationalOperatorCall(
         instrInfos, arguments, objectFunctionCallNamePart, 1);
   } else {
-    predicat = objectFunctionCallNamePart + "(" +
+    predicate = objectFunctionCallNamePart + "(" +
                GenerateArgumentsList(arguments, 1) + ")";
   }
-  if (conditionInverted) predicat = GenerateNegatedPredicat(predicat);
+  if (conditionInverted) predicate = GenerateNegatedPredicate(predicate);
 
-  return "For each picked object \"" + objectName + "\", check " + predicat +
+  return "For each picked object \"" + objectName + "\", check " + predicate +
          ".\n";
 }
 
@@ -1089,16 +1090,16 @@ gd::String EventsCodeGenerator::GenerateBehaviorCondition(
     bool conditionInverted,
     gd::EventsCodeGenerationContext& context) {
   // Create call
-  gd::String predicat;
+  gd::String predicate;
   if ((instrInfos.codeExtraInformation.type == "number" ||
        instrInfos.codeExtraInformation.type == "string")) {
-    predicat = GenerateRelationalOperatorCall(instrInfos, arguments, "", 2);
+    predicate = GenerateRelationalOperatorCall(instrInfos, arguments, "", 2);
   } else {
-    predicat = "(" + GenerateArgumentsList(arguments, 2) + ")";
+    predicate = "(" + GenerateArgumentsList(arguments, 2) + ")";
   }
-  if (conditionInverted) predicat = GenerateNegatedPredicat(predicat);
+  if (conditionInverted) predicate = GenerateNegatedPredicate(predicate);
 
-  return "For each picked object \"" + objectName + "\", check " + predicat +
+  return "For each picked object \"" + objectName + "\", check " + predicate +
          " for behavior \"" + behaviorName + "\".\n";
 }
 
@@ -1238,7 +1239,7 @@ size_t EventsCodeGenerator::GenerateSingleUsageUniqueIdFor(
               << std::endl;
   }
 
-  // Base the unique id on the adress in memory so that the same instruction
+  // Base the unique id on the address in memory so that the same instruction
   // in memory will get the same id across different code generations.
   size_t uniqueId = (size_t)instruction;
 

Core/GDCore/Events/CodeGeneration/EventsCodeGenerator.h

@@ -404,6 +404,18 @@ class GD_CORE_API EventsCodeGenerator {
     return boolName;
   }
 
+  /**
+   * \brief Generate the full name for accessing to a boolean variable used for
+   * conditions.
+   *
+   * Default implementation just returns the boolean name passed as argument.
+   */
+  virtual gd::String GenerateUpperScopeBooleanFullName(
+      const gd::String& boolName,
+      const gd::EventsCodeGenerationContext& context) {
+    return boolName;
+  }
+
   /**
    * \brief Must create a boolean. Its value must be false.
    *
@@ -493,9 +505,9 @@ class GD_CORE_API EventsCodeGenerator {
    * - object : Object name -> string
    * - expression : Mathematical expression -> number (double)
    * - string : %Text expression -> string
-   * - layer, color, file, joyaxis : Same as string
+   * - layer, color, file, stringWithSelector : Same as string
    * - relationalOperator : Used to make a comparison between the function
-  resturn value and value of the parameter preceding the relationOperator
+  return value and value of the parameter preceding the relationOperator
   parameter -> string
    * - operator : Used to update a value using a setter and a getter -> string
    * - key, mouse, objectvar, scenevar, globalvar, password, musicfile,
@@ -656,28 +668,15 @@ class GD_CORE_API EventsCodeGenerator {
   };
 
   /**
-   * \brief Must negate a predicat.
+   * \brief Must negate a predicate.
    *
-   * The default implementation generates C-style code : It wraps the predicat
+   * The default implementation generates C-style code : It wraps the predicate
    * inside parenthesis and add a !.
    */
-  virtual gd::String GenerateNegatedPredicat(const gd::String& predicat) const {
-    return "!(" + predicat + ")";
+  virtual gd::String GenerateNegatedPredicate(const gd::String& predicate) const {
+    return "!(" + predicate + ")";
   };
 
-  /**
-   * \brief Must create a boolean which is a reference to a boolean declared in
-   * the parent scope.
-   *
-   * The default implementation generates C-style code.
-   */
-  virtual gd::String GenerateReferenceToUpperScopeBoolean(
-      const gd::String& referenceName,
-      const gd::String& referencedBoolean,
-      gd::EventsCodeGenerationContext& context) {
-    return "bool & " + referenceName + " = " + referencedBoolean + ";\n";
-  }
-
   virtual gd::String GenerateFreeCondition(
       const std::vector<gd::String>& arguments,
       const gd::InstructionMetadata& instrInfos,
@@ -786,7 +785,7 @@ class GD_CORE_API EventsCodeGenerator {
   const gd::Project* project;  ///< The project being used.
   const gd::Layout* scene;     ///< The scene being generated.
 
-  bool errorOccurred;          ///< Must be set to true if an error occured.
+  bool errorOccurred;          ///< Must be set to true if an error occurred.
   bool compilationForRuntime;  ///< Is set to true if the code generation is
                                ///< made for runtime only.
 

Core/GDCore/Events/CodeGeneration/ExpressionCodeGenerator.cpp

@@ -51,8 +51,8 @@ gd::String ExpressionCodeGenerator::GenerateExpressionCode(
                                     codeGenerator.GetObjectsAndGroups(),
                                     rootType);
   node->Visit(validator);
-  if (!validator.GetErrors().empty()) {
-    std::cout << "Error: \"" << validator.GetErrors()[0]->GetMessage()
+  if (!validator.GetFatalErrors().empty()) {
+    std::cout << "Error: \"" << validator.GetFatalErrors()[0]->GetMessage()
               << "\" in: \"" << expression.GetPlainString() << "\" ("
               << rootType << ")" << std::endl;
 
@@ -170,7 +170,7 @@ void ExpressionCodeGenerator::OnVisitIdentifierNode(IdentifierNode& node) {
   }
   else {
     // This is for function names that are put in IdentifierNode
-    // because the type is needed to tell them appart from variables.
+    // because the type is needed to tell them apart from variables.
     output += GenerateDefaultValue(type);
   }
 }

Core/GDCore/Events/Event.cpp

@@ -9,6 +9,7 @@
 #include "GDCore/Events/Builtin/AsyncEvent.h"
 #include "GDCore/Events/CodeGeneration/EventsCodeGenerator.h"
 #include "GDCore/Events/EventsList.h"
+#include "GDCore/Events/EventVisitor.h"
 #include "GDCore/Extensions/Metadata/MetadataProvider.h"
 #include "GDCore/Extensions/Platform.h"
 #include "GDCore/Extensions/PlatformExtension.h"
@@ -140,6 +141,14 @@ void BaseEvent::Preprocess(gd::EventsCodeGenerator& codeGenerator,
   }
 }
 
+bool BaseEvent::AcceptVisitor(gd::EventVisitor& eventVisitor) {
+  return eventVisitor.VisitEvent(*this);
+}
+
+void BaseEvent::AcceptVisitor(gd::ReadOnlyEventVisitor& eventVisitor) const {
+  eventVisitor.VisitEvent(*this);
+}
+
 BaseEventSPtr GD_CORE_API CloneRememberingOriginalEvent(BaseEventSPtr event) {
   gd::BaseEventSPtr copy(event->Clone());
   // Original event is either the original event of the copied event, or the

Core/GDCore/Events/Event.h

@@ -24,6 +24,8 @@ class EventsCodeGenerationContext;
 class Platform;
 class SerializerElement;
 class Instruction;
+class EventVisitor;
+class ReadOnlyEventVisitor;
 }  // namespace gd
 
 namespace gd {
@@ -238,6 +240,9 @@ class GD_CORE_API BaseEvent {
    */
   virtual void UnserializeFrom(gd::Project& project,
                                const SerializerElement& element){};
+  
+  virtual bool AcceptVisitor(gd::EventVisitor& eventVisitor);
+  virtual void AcceptVisitor(gd::ReadOnlyEventVisitor& eventVisitor) const;
   ///@}
 
   /** \name Common properties

Core/GDCore/Events/EventVisitor.h

@@ -0,0 +1,76 @@
+/*
+ * 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 <iostream>
+#include <memory>
+#include <vector>
+
+#include "GDCore/String.h"
+
+namespace gd {
+class BaseEvent;
+class LinkEvent;
+}  // namespace gd
+
+namespace gd {
+
+/**
+ * \brief Visitor of any kind of event.
+ *
+ * \ingroup Events
+ */
+class GD_CORE_API EventVisitor {
+ public:
+  virtual ~EventVisitor(){};
+
+  /**
+   * Called to do some work on an event.
+   * 
+   * \return true if the event must be deleted from the events list, false
+   * otherwise.
+   */
+  virtual bool VisitEvent(gd::BaseEvent& linkEvent) = 0;
+  
+  /**
+   * Called to do some work on a link event.
+   * 
+   * Note that VisitEvent is also called with this event.
+   * 
+   * \return true if the event must be deleted from the events list, false
+   * otherwise.
+   */
+  virtual bool VisitLinkEvent(gd::LinkEvent& linkEvent) = 0;
+};
+
+/**
+ * \brief Visitor of any kind of event.
+ *
+ * \ingroup Events
+ */
+class GD_CORE_API ReadOnlyEventVisitor {
+ public:
+  virtual ~ReadOnlyEventVisitor(){};
+
+  /**
+   * Called to do some work on an event.
+   */
+  virtual void VisitEvent(const gd::BaseEvent& linkEvent) = 0;
+
+  /**
+   * Called to do some work on a link event.
+   * 
+   * Note that VisitEvent is also called with this event.
+   */
+  virtual void VisitLinkEvent(const gd::LinkEvent& linkEvent) = 0;
+
+  /**
+   * @brief Abort the iteration on the events.
+   */
+  virtual void StopAnyEventIteration() = 0;
+};
+
+}

Core/GDCore/Events/EventsList.cpp

@@ -5,6 +5,7 @@
  */
 
 #include "EventsList.h"
+
 #include "GDCore/Events/Event.h"
 #include "GDCore/Project/Project.h"
 #include "GDCore/Tools/Log.h"
@@ -100,9 +101,8 @@ bool EventsList::Contains(const gd::BaseEvent& eventToSearch,
 }
 
 bool EventsList::MoveEventToAnotherEventsList(const gd::BaseEvent& eventToMove,
-                                  gd::EventsList& newEventsList,
-                                  std::size_t newPosition) {
-
+                                              gd::EventsList& newEventsList,
+                                              std::size_t newPosition) {
   for (std::size_t i = 0; i < GetEventsCount(); ++i) {
     if (events[i].get() == &eventToMove) {
       std::shared_ptr<BaseEvent> event = events[i];

Core/GDCore/Events/Instruction.cpp

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

Core/GDCore/Events/Instruction.h

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

Core/GDCore/Extensions/Builtin/AdvancedExtension.cpp

@@ -33,7 +33,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAdvancedExtension(
           "res/function32.png",
           "res/function32.png")
       .SetHelpPath("/events/functions/return")
-      .AddParameter("expression", "The number to be returned")
+      .AddParameter("expression", _("The number to be returned"))
+      .SetRelevantForFunctionEventsOnly()
       .MarkAsAdvanced();
 
   extension
@@ -47,7 +48,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAdvancedExtension(
           "res/function32.png",
           "res/function32.png")
       .SetHelpPath("/events/functions/return")
-      .AddParameter("string", "The text to be returned")
+      .AddParameter("string", _("The text to be returned"))
+      .SetRelevantForFunctionEventsOnly()
       .MarkAsAdvanced();
 
   extension
@@ -60,7 +62,38 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAdvancedExtension(
                  "res/function32.png",
                  "res/function32.png")
       .SetHelpPath("/events/functions/return")
-      .AddParameter("trueorfalse", "Should the condition be true or false?")
+      .AddParameter("trueorfalse", _("Should the condition be true or false?"))
+      .SetRelevantForFunctionEventsOnly()
+      .MarkAsAdvanced();
+
+  extension
+      .AddAction("CopyArgumentToVariable",
+                 _("Copy function parameter to variable"),
+                 _("Copy a function parameter (also called \"argument\") to a variable. "
+                 "The parameter type must be a variable."),
+                 _("Copy the parameter _PARAM0_ into the variable _PARAM1_"),
+                 "",
+                 "res/function32.png",
+                 "res/function32.png")
+      .SetHelpPath("/events/functions/return")
+      .AddParameter("functionParameterName", _("Parameter name"), "variable")
+      .AddParameter("scenevar", _("Scene variable"))
+      .SetRelevantForFunctionEventsOnly()
+      .MarkAsAdvanced();
+
+  extension
+      .AddAction("CopyVariableToArgument",
+                 _("Copy variable to function parameter"),
+                 _("Copy a variable to function parameter (also called \"argument\"). "
+                 "The parameter type must be a variable."),
+                 _("Copy the variable _PARAM1_ into the parameter _PARAM0_"),
+                 "",
+                 "res/function32.png",
+                 "res/function32.png")
+      .SetHelpPath("/events/functions/return")
+      .AddParameter("functionParameterName", _("Parameter name"), "variable")
+      .AddParameter("scenevar", _("Scene variable"))
+      .SetRelevantForFunctionEventsOnly()
       .MarkAsAdvanced();
 
   extension
@@ -74,7 +107,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAdvancedExtension(
                     "",
                     "res/function32.png",
                     "res/function32.png")
-      .AddParameter("functionParameterName", "Parameter name")
+      .AddParameter("functionParameterName", _("Parameter name"), "number,string,boolean")
+      .SetRelevantForFunctionEventsOnly()
       .MarkAsAdvanced();
 
   extension
@@ -84,7 +118,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAdvancedExtension(
           _("Get function parameter (also called \"argument\") value."),
           "",
           "res/function16.png")
-      .AddParameter("functionParameterName", "Parameter name");
+      .AddParameter("functionParameterName", _("Parameter name"), "number,string,boolean")
+      .SetRelevantForFunctionEventsOnly();
 
   extension
       .AddStrExpression(
@@ -93,7 +128,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAdvancedExtension(
           _("Get function parameter (also called \"argument\") text."),
           "",
           "res/function16.png")
-      .AddParameter("functionParameterName", "Parameter name");
+      .AddParameter("functionParameterName", _("Parameter name"), "number,string,boolean")
+      .SetRelevantForFunctionEventsOnly();
 
   extension
       .AddCondition(
@@ -104,8 +140,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAdvancedExtension(
           "",
           "res/function32.png",
           "res/function16.png")
-      .AddParameter("functionParameterName", "Parameter name")
-      .UseStandardRelationalOperatorParameters("number");
+      .AddParameter("functionParameterName", _("Parameter name"), "number,string,boolean")
+      .UseStandardRelationalOperatorParameters(
+          "number", gd::ParameterOptions::MakeNewOptions())
+      .SetRelevantForFunctionEventsOnly();
 
   extension
       .AddCondition(
@@ -116,8 +154,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAdvancedExtension(
           "",
           "res/function32.png",
           "res/function16.png")
-      .AddParameter("functionParameterName", "Parameter name")
-      .UseStandardRelationalOperatorParameters("string");
+      .AddParameter("functionParameterName", _("Parameter name"), "number,string,boolean")
+      .UseStandardRelationalOperatorParameters(
+          "string", gd::ParameterOptions::MakeNewOptions())
+      .SetRelevantForFunctionEventsOnly();
 }
 
 }  // namespace gd

Core/GDCore/Extensions/Builtin/AsyncExtension.cpp

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

Core/GDCore/Extensions/Builtin/AudioExtension.cpp

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

Core/GDCore/Extensions/Builtin/BaseObjectExtension.cpp

@@ -27,6 +27,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .SetIcon("res/actions/create24.png");
   extension.AddInstructionOrExpressionGroupMetadata(_("Movement using forces"))
       .SetIcon("res/actions/force24.png");
+  extension.AddInstructionOrExpressionGroupMetadata(_("Variables"))
+      .SetIcon("res/conditions/var24.png");
+  extension.AddInstructionOrExpressionGroupMetadata(_("Position"))
+      .SetIcon("res/actions/position24_black.png");
 
   gd::ObjectMetadata& obj = extension.AddObject<gd::ObjectConfiguration>(
       "", _("Base object"), _("Base object"), "res/objeticon24.png");
@@ -40,7 +44,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                    "res/conditions/position_black.png")
 
       .AddParameter("object", _("Object"))
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions())
       .MarkAsSimple();
 
   obj.AddAction("MettreX",
@@ -52,7 +57,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                 "res/actions/position_black.png")
 
       .AddParameter("object", _("Object"))
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters("number",
+                                     ParameterOptions::MakeNewOptions())
       .MarkAsSimple();
 
   obj.AddCondition("PosY",
@@ -64,7 +70,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                    "res/conditions/position_black.png")
 
       .AddParameter("object", _("Object"))
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions())
       .MarkAsSimple();
 
   obj.AddAction("MettreY",
@@ -76,7 +83,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                 "res/actions/position_black.png")
 
       .AddParameter("object", _("Object"))
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters("number",
+                                     ParameterOptions::MakeNewOptions())
       .MarkAsSimple();
 
   obj.AddAction("MettreXY",
@@ -120,7 +128,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
          _("Position/Center"),
          "res/actions/position24_black.png")
       .AddParameter("object", _("Object"))
-      .UseStandardParameters("number");
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions());
 
   obj.AddExpressionAndConditionAndAction(
          "number",
@@ -131,7 +139,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
          _("Position/Center"),
          "res/actions/position24_black.png")
       .AddParameter("object", _("Object"))
-      .UseStandardParameters("number");
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions());
 
   obj.AddExpressionAndCondition("number",
                                 "BoundingBoxLeft",
@@ -142,7 +150,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                                 _("Position/Bounding Box"),
                                 "res/conditions/bounding-box-left_black.svg")
       .AddParameter("object", _("Object"))
-      .UseStandardParameters("number");
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions());
 
   obj.AddExpressionAndCondition(
          "number",
@@ -153,7 +161,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
          _("Position/Bounding Box"),
          "res/conditions/bounding-box-top_black.svg")
       .AddParameter("object", _("Object"))
-      .UseStandardParameters("number");
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions());
 
   obj.AddExpressionAndCondition("number",
                                 "BoundingBoxRight",
@@ -164,7 +172,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                                 _("Position/Bounding Box"),
                                 "res/conditions/bounding-box-right_black.svg")
       .AddParameter("object", _("Object"))
-      .UseStandardParameters("number");
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions());
 
   obj.AddExpressionAndCondition("number",
                                 "BoundingBoxBottom",
@@ -175,7 +183,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                                 _("Position/Bounding Box"),
                                 "res/conditions/bounding-box-bottom_black.svg")
       .AddParameter("object", _("Object"))
-      .UseStandardParameters("number");
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions());
 
   obj.AddExpressionAndCondition("number",
                                 "BoundingBoxCenterX",
@@ -186,7 +194,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                                 _("Position/Bounding Box"),
                                 "res/conditions/bounding-box-center_black.svg")
       .AddParameter("object", _("Object"))
-      .UseStandardParameters("number");
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions());
 
   obj.AddExpressionAndCondition("number",
                                 "BoundingBoxCenterY",
@@ -197,7 +205,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                                 _("Position/Bounding Box"),
                                 "res/conditions/bounding-box-center_black.svg")
       .AddParameter("object", _("Object"))
-      .UseStandardParameters("number");
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions());
 
   obj.AddAction("MettreAutourPos",
                 _("Put around a position"),
@@ -226,7 +234,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                 "res/actions/direction_black.png")
 
       .AddParameter("object", _("Object"))
-      .UseStandardOperatorParameters("number");
+      .UseStandardOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Angle (in degrees)")));
 
   obj.AddAction("Rotate",
                 _("Rotate"),
@@ -382,7 +393,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                 "res/actions/planicon.png")
 
       .AddParameter("object", _("Object"))
-      .UseStandardOperatorParameters("number");
+      .UseStandardOperatorParameters("number",
+                                     ParameterOptions::MakeNewOptions());
 
   obj.AddAction("ChangeLayer",
                 _("Layer"),
@@ -398,8 +410,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .MarkAsAdvanced();
 
   obj.AddAction("ModVarObjet",
-                _("Value of an object variable"),
-                _("Change the value of an object variable."),
+                _("Change number variable"),
+                _("Modify the number value of an object variable."),
                 _("the variable _PARAM1_"),
                 _("Variables"),
                 "res/actions/var24.png",
@@ -407,11 +419,12 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
 
       .AddParameter("object", _("Object"))
       .AddParameter("objectvar", _("Variable"))
-      .UseStandardOperatorParameters("number");
+      .UseStandardOperatorParameters("number",
+                                     ParameterOptions::MakeNewOptions());
 
   obj.AddAction("ModVarObjetTxt",
-                _("Text of an object variable"),
-                _("Change the text of an object variable."),
+                _("Change text variable"),
+                _("Modify the text of an object variable."),
                 _("the text of variable _PARAM1_"),
                 _("Variables"),
                 "res/actions/var24.png",
@@ -419,11 +432,12 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
 
       .AddParameter("object", _("Object"))
       .AddParameter("objectvar", _("Variable"))
-      .UseStandardOperatorParameters("string");
+      .UseStandardOperatorParameters("string",
+                                     ParameterOptions::MakeNewOptions());
 
   obj.AddAction("SetObjectVariableAsBoolean",
-                _("Boolean value of an object variable"),
-                _("Change the boolean value of an object variable."),
+                _("Change boolean variable"),
+                _("Modify the boolean value of an object variable."),
                 _("Set the boolean value of variable _PARAM1_ of "
                   "_PARAM0_ to _PARAM2_"),
                 _("Variables"),
@@ -436,7 +450,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
 
   obj.AddAction(
          "ToggleObjectVariableAsBoolean",
-         _("Toggle the boolean value of an object variable"),
+         _("Toggle boolean variable"),
          _("Toggles the boolean value of an object variable.") + "\n" +
              _("If it was true, it will become false, and if it was false "
                "it will become true."),
@@ -451,37 +465,39 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
 
   obj.AddCondition("ObjectVariableChildExists",
                    _("Child existence"),
-                   _("Check if the specified child of the variable exists."),
+                   _("Check if the specified child of the object "
+                     "structure variable exists."),
                    _("Child _PARAM2_ of variable _PARAM1_ of _PARAM0_ exists"),
-                   _("Variables/Collections/Structures"),
+                   _("Variables/Arrays and structures"),
                    "res/conditions/var24.png",
                    "res/conditions/var.png")
       .AddParameter("object", _("Object"))
-      .AddParameter("objectvar", _("Variable"))
+      .AddParameter("objectvar", _("Structure variable"))
       .AddParameter("string", _("Name of the child"))
       .MarkAsAdvanced();
 
   obj.AddAction("ObjectVariableRemoveChild",
                 _("Remove a child"),
-                _("Remove a child from an object variable."),
+                _("Remove a child from an object structure variable."),
                 _("Remove child _PARAM2_ from variable _PARAM1_ of _PARAM0_"),
-                _("Variables/Collections/Structures"),
+                _("Variables/Arrays and structures"),
                 "res/actions/var24.png",
                 "res/actions/var.png")
       .AddParameter("object", _("Object"))
-      .AddParameter("objectvar", _("Variable"))
+      .AddParameter("objectvar", _("Structure variable"))
       .AddParameter("string", _("Child's name"))
       .MarkAsAdvanced();
 
   obj.AddAction("ObjectVariableClearChildren",
-                _("Clear variable"),
-                _("Remove all the children from the object variable."),
+                _("Clear children"),
+                _("Remove all the children from the object array or structure "
+                  "variable."),
                 _("Clear children from variable _PARAM1_ of _PARAM0_"),
-                _("Variables/Collections"),
+                _("Variables/Arrays and structures"),
                 "res/actions/var24.png",
                 "res/actions/var.png")
       .AddParameter("object", _("Object"))
-      .AddParameter("objectvar", _("Variable"))
+      .AddParameter("objectvar", _("Array or structure variable"))
       .MarkAsAdvanced();
 
   obj.AddAction("Cache",
@@ -516,7 +532,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                    "res/conditions/direction_black.png")
 
       .AddParameter("object", _("Object"))
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Angle to compare to (in degrees)")))
       .MarkAsAdvanced();
 
   obj.AddCondition("Plan",
@@ -528,7 +547,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                    "res/conditions/planicon.png")
 
       .AddParameter("object", _("Object"))
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   obj.AddCondition("Layer",
@@ -585,7 +605,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                    "res/conditions/vitesse.png")
 
       .AddParameter("object", _("Object"))
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   obj.AddCondition("AngleOfDisplacement",
@@ -604,8 +625,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .MarkAsAdvanced();
 
   obj.AddCondition("VarObjet",
-                   _("Value of an object variable"),
-                   _("Compare the value of an object variable."),
+                   _("Number variable"),
+                   _("Compare the number value of an object variable."),
                    _("the variable _PARAM1_"),
                    _("Variables"),
                    "res/conditions/var24.png",
@@ -613,10 +634,11 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
 
       .AddParameter("object", _("Object"))
       .AddParameter("objectvar", _("Variable"))
-      .UseStandardRelationalOperatorParameters("number");
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions());
 
   obj.AddCondition("VarObjetTxt",
-                   _("Text of an object variable"),
+                   _("Text variable"),
                    _("Compare the text of an object variable."),
                    _("the text of variable _PARAM1_"),
                    _("Variables"),
@@ -625,10 +647,11 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
 
       .AddParameter("object", _("Object"))
       .AddParameter("objectvar", _("Variable"))
-      .UseStandardRelationalOperatorParameters("string");
+      .UseStandardRelationalOperatorParameters(
+          "string", ParameterOptions::MakeNewOptions());
 
   obj.AddCondition("ObjectVariableAsBoolean",
-                   _("Boolean value of an object variable"),
+                   _("Boolean variable"),
                    _("Compare the boolean value of an object variable."),
                    _("The boolean value of variable _PARAM1_ of object "
                      "_PARAM0_ is _PARAM2_"),
@@ -642,7 +665,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
 
   obj.AddCondition("VarObjetDef",
                    "Variable defined",
-                   "Check if the variable is defined.",
+                   "Check if the object variable is defined.",
                    "Variable _PARAM1 of _PARAM0_ is defined",
                    _("Variables"),
                    "res/conditions/var24.png",
@@ -650,78 +673,131 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
 
       .AddParameter("object", _("Object"))
       .AddParameter("string", _("Variable"))
-      .SetHidden();
+      .SetHidden();  // Deprecated.
 
   obj.AddAction(
          "ObjectVariablePush",
-         _("Append variable to an object array"),
-         _("Appends a variable to the end of an object array variable."),
-         _("Append variable _PARAM2_ to array variable _PARAM1_ of _PARAM0_"),
-         _("Variables/Collections/Arrays"),
+         _("Add existing variable"),
+         _("Adds an existing variable to the end of an object array variable."),
+         _("Add variable _PARAM2_ to array variable _PARAM1_ of _PARAM0_"),
+         _("Variables/Arrays and structures"),
          "res/actions/var24.png",
          "res/actions/var.png")
       .AddParameter("object", _("Object"))
       .AddParameter("objectvar", _("Array variable"))
-      .AddParameter("scenevar", _("Scene variable with the content to append"))
-      .SetParameterLongDescription(
-          _("The content of the variable will *be copied* and appended at the "
-            "end of the array."))
+      .AddParameter("scenevar", _("Scene variable with the content to add"))
+      .SetParameterLongDescription(_("The content of the object variable will "
+                                     "*be copied* and added at the "
+                                     "end of the array."))
       .MarkAsAdvanced();
 
   obj.AddAction(
          "ObjectVariablePushString",
-         _("Append a string to an object array"),
-         _("Appends a string to the end of an object array variable."),
-         _("Append string _PARAM2_ to array variable _PARAM1_ of _PARAM0_"),
-         _("Variables/Collections/Arrays"),
+         _("Add text variable"),
+         _("Adds a text (string) to the end of an object array variable."),
+         _("Add text _PARAM2_ to array variable _PARAM1_ of _PARAM0_"),
+         _("Variables/Arrays and structures"),
          "res/actions/var24.png",
          "res/actions/var.png")
       .AddParameter("object", _("Object"))
       .AddParameter("objectvar", _("Array variable"))
-      .AddParameter("string", _("String to append"))
+      .AddParameter("string", _("Text to add"))
       .MarkAsAdvanced();
 
-  obj.AddAction(
-         "ObjectVariablePushNumber",
-         _("Append a number to an object array"),
-         _("Appends a number to the end of an object array variable."),
-         _("Append number _PARAM2_ to array variable _PARAM1_ of _PARAM0_"),
-         _("Variables/Collections/Arrays"),
-         "res/actions/var24.png",
-         "res/actions/var.png")
+  obj.AddAction("ObjectVariablePushNumber",
+                _("Add number variable"),
+                _("Adds a number to the end of an object array variable."),
+                _("Add number _PARAM2_ to array variable _PARAM1_ of _PARAM0_"),
+                _("Variables/Arrays and structures"),
+                "res/actions/var24.png",
+                "res/actions/var.png")
       .AddParameter("object", _("Object"))
       .AddParameter("objectvar", _("Array variable"))
-      .AddParameter("expression", _("Number to append"))
+      .AddParameter("expression", _("Number to add"))
       .MarkAsAdvanced();
 
   obj.AddAction(
          "ObjectVariablePushBool",
-         _("Append a boolean to an object array"),
-         _("Appends a boolean to the end of an object array variable."),
-         _("Append boolean _PARAM2_ to array variable _PARAM1_ of _PARAM0_"),
-         _("Variables/Collections/Arrays"),
+         _("Add boolean variable"),
+         _("Adds a boolean to the end of an object array variable."),
+         _("Add boolean _PARAM2_ to array variable _PARAM1_ of _PARAM0_"),
+         _("Variables/Arrays and structures"),
          "res/actions/var24.png",
          "res/actions/var.png")
       .AddParameter("object", _("Object"))
       .AddParameter("objectvar", _("Array variable"))
-      .AddParameter("trueorfalse", _("Boolean to append"))
+      .AddParameter("trueorfalse", _("Boolean to add"))
       .MarkAsAdvanced();
 
   obj.AddAction(
          "ObjectVariableRemoveAt",
-         _("Remove variable from an object array (by index)"),
+         _("Remove variable by index"),
          _("Removes a variable at the specified index of an object array "
            "variable."),
          _("Remove variable at index _PARAM2_ from array variable _PARAM1_ of "
            "_PARAM0_"),
-         _("Variables/Collections/Arrays"),
+         _("Variables/Arrays and structures"),
          "res/actions/var24.png",
          "res/actions/var.png")
       .AddParameter("object", _("Object"))
-      .AddParameter("objectvar", _("Variable"))
+      .AddParameter("objectvar", _("Array variable"))
       .AddParameter("expression", _("Index to remove"))
       .MarkAsAdvanced();
 
+  obj.AddCondition(
+         "ObjectVariableChildCount",
+         _("Number of children"),
+         _("Compare the number of children in an object array variable."),
+         _("The number of children in the array variable _PARAM1_"),
+         _("Variables/Arrays and structures"),
+         "res/conditions/var24.png",
+         "res/conditions/var.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("objectvar", _("Variable"))
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions())
+      .MarkAsAdvanced();
+
+  obj.AddStrExpression(
+         "ArrayVariableFirstString",
+         _("First text child"),
+         _("Get the value of the first element of an object array variable, if "
+           "it is a text (string) variable."),
+         _("Variables/Arrays and structures"),
+         "res/actions/var.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("objectvar", _("Array variable"));
+
+  obj.AddExpression(
+         "ArrayVariableFirstNumber",
+         _("First number child"),
+         _("Get the value of the first element of an object array variable, if "
+           "it is a number variable."),
+         _("Variables/Arrays and structures"),
+         "res/actions/var.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("objectvar", _("Array variable"));
+
+  obj.AddStrExpression(
+         "ArrayVariableLastString",
+         _("Last text child"),
+         _("Get the value of the last element of an object array variable, if "
+           "it is a text (string) variable."),
+         _("Variables/Arrays and structures"),
+         "res/actions/var.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("objectvar", _("Array variable"));
+
+  obj.AddExpression(
+         "ArrayVariableLastNumber",
+         _("Last number child"),
+         _("Get the value of the last element of an object array variable, if "
+           "it is a number variable."),
+         _("Variables/Arrays and structures"),
+         "res/actions/var.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("objectvar", _("Array variable"));
+
   obj.AddCondition("BehaviorActivated",
                    _("Behavior activated"),
                    _("Check if the behavior is activated for the object."),
@@ -1098,23 +1174,24 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .AddParameter("expression", _("Target Y position"));
 
   obj.AddExpression("Variable",
-                    _("Value of an object variable"),
-                    _("Value of an object variable"),
+                    _("Number variable"),
+                    _("Number value of an object variable"),
                     _("Variables"),
                     "res/actions/var.png")
       .AddParameter("object", _("Object"))
       .AddParameter("objectvar", _("Variable"));
 
-  obj.AddExpression("VariableChildCount",
-                    _("Number of children of an object variable"),
-                    _("Number of children of an object variable"),
-                    _("Variables"),
-                    "res/actions/var.png")
+  obj.AddExpression(
+         "VariableChildCount",
+         _("Number of children"),
+         _("Number of children in an object array or structure variable"),
+         _("Variables/Arrays and structures"),
+         "res/actions/var.png")
       .AddParameter("object", _("Object"))
-      .AddParameter("objectvar", _("Variable"));
+      .AddParameter("objectvar", _("Array or structure variable"));
 
   obj.AddStrExpression("VariableString",
-                       _("Text of an object variable"),
+                       _("Text variable"),
                        _("Text of an object variable"),
                        _("Variables"),
                        "res/actions/var.png")
@@ -1248,6 +1325,17 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .MarkAsSimple()
       .SetRequiresBaseObjectCapability("effect");
 
+  obj.AddAction("SetIncludedInParentCollisionMask",
+                _("Include in parent collision mask"),
+                _("Include or exclude a child from its parent collision mask."),
+                _("Include _PARAM0_ in parent object collision mask: _PARAM1_"),
+                _("Collision"),
+                "res/function32.png",
+                "res/function32.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("yesorno", "Include in parent collision mask")
+      .SetRelevantForCustomObjectEventsOnly();
+
   extension
       .AddAction("Create",
                  _("Create an object"),
@@ -1261,7 +1349,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .AddParameter("objectListOrEmptyIfJustDeclared", _("Object to create"))
       .AddParameter("expression", _("X position"))
       .AddParameter("expression", _("Y position"))
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .MarkAsSimple();
 
@@ -1276,7 +1364,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                  "res/actions/create24.png",
                  "res/actions/create24.png")
       .AddCodeOnlyParameter("objectsContext", "")
-      .AddParameter("objectListOrEmptyIfJustDeclared", _("Group of potential objects"))
+      .AddParameter("objectListOrEmptyIfJustDeclared",
+                    _("Group of potential objects"))
       .SetParameterLongDescription(
           _("Group containing objects that can be created by the action."))
       .AddParameter("string", _("Name of the object to create"))
@@ -1285,7 +1374,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
           "with this name are found in the group, no object will be created."))
       .AddParameter("expression", _("X position"))
       .AddParameter("expression", _("Y position"))
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .MarkAsAdvanced();
 
@@ -1315,7 +1404,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
           _("Objects"),
           "res/actions/ajouthasard24.png",
           "res/actions/ajouthasard.png")
-      .AddCodeOnlyParameter("currentScene", "")
+      .AddCodeOnlyParameter("objectsContext", "")
       .AddParameter("objectList", _("Object"))
       .MarkAsSimple();
 
@@ -1374,7 +1463,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
           _("Objects"),
           "res/conditions/add24.png",
           "res/conditions/add.png")
-      .AddCodeOnlyParameter("currentScene", "")
+      .AddCodeOnlyParameter("objectsContext", "")
       .AddParameter("objectList", _("Object"))
       .MarkAsAdvanced();
 
@@ -1389,7 +1478,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
           _("Objects"),
           "res/conditions/ajouthasard24.png",
           "res/conditions/ajouthasard.png")
-      .AddCodeOnlyParameter("currentScene", "")
+      .AddCodeOnlyParameter("objectsContext", "")
       .AddParameter("objectList", _("Object"))
       .MarkAsSimple();
 
@@ -1423,34 +1512,39 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
           "res/conditions/nbObjet24.png",
           "res/conditions/nbObjet.png")
       .AddParameter("objectList", _("Object"))
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions())
       .MarkAsSimple()
       .SetHidden();
 
-  extension.AddExpressionAndCondition(
-      "number",
-      "SceneInstancesCount",
-      _("Number of object instances on the scene"),
-      _("the number of instances of the specified objects living on the scene"),
-      _("the number of _PARAM1_ living on the scene"),
-      _("Objects"),
-      "res/conditions/nbObjet24.png")
-    .AddCodeOnlyParameter("objectsContext", "")
-    .AddParameter("objectListOrEmptyWithoutPicking", _("Object"))
-    .UseStandardParameters("number")
-    .MarkAsSimple();
+  extension
+      .AddExpressionAndCondition(
+          "number",
+          "SceneInstancesCount",
+          _("Number of object instances on the scene"),
+          _("the number of instances of the specified objects living on the "
+            "scene"),
+          _("the number of _PARAM1_ living on the scene"),
+          _("Objects"),
+          "res/conditions/nbObjet24.png")
+      .AddCodeOnlyParameter("objectsContext", "")
+      .AddParameter("objectListOrEmptyWithoutPicking", _("Object"))
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
+      .MarkAsSimple();
 
-  extension.AddExpressionAndCondition(
-      "number",
-      "PickedInstancesCount",
-      _("Number of object instances currently picked"),
-      _("the number of instances picked by the previous conditions (or actions)"),
-      _("the number of _PARAM0_ currently picked"),
-      _("Objects"),
-      "res/conditions/nbObjet24.png")
-    .AddParameter("objectListOrEmptyWithoutPicking", _("Object"))
-    .UseStandardParameters("number")
-    .MarkAsSimple();
+  extension
+      .AddExpressionAndCondition(
+          "number",
+          "PickedInstancesCount",
+          _("Number of object instances currently picked"),
+          _("the number of instances picked by the previous conditions (or "
+            "actions)"),
+          _("the number of _PARAM0_ currently picked"),
+          _("Objects"),
+          "res/conditions/nbObjet24.png")
+      .AddParameter("objectListOrEmptyWithoutPicking", _("Object"))
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
+      .MarkAsSimple();
 
   extension
       .AddCondition(
@@ -1494,7 +1588,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
           "Raycast",
           _("Raycast"),
           _("Sends a ray from the given source position and angle, "
-            "intersecting the closest object.\nThe instersected "
+            "intersecting the closest object.\nThe intersected "
             "object will become the only one taken into account.\nIf "
             "the condition is inverted, the object to be intersected "
             "will be the farthest one within the ray radius."),
@@ -1525,7 +1619,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
           "RaycastToPosition",
           _("Raycast to position"),
           _("Sends a ray from the given source position to the final point, "
-            "intersecting the closest object.\nThe instersected "
+            "intersecting the closest object.\nThe intersected "
             "object will become the only one taken into account.\nIf "
             "the condition is inverted, the object to be intersected "
             "will be the farthest one within the ray radius."),
@@ -1559,7 +1653,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                      "",
                      "res/conditions/nbObjet.png")
       .AddParameter("objectList", _("Object"))
-      .SetHidden(); // Deprecated
+      .SetHidden();  // Deprecated
 
   obj.AddStrExpression("ObjectName",
                        _("Object name"),

Core/GDCore/Extensions/Builtin/CameraExtension.cpp

@@ -26,6 +26,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
       .SetExtensionHelpPath("/interface/scene-editor/layers-and-cameras");
   extension.AddInstructionOrExpressionGroupMetadata(_("Layers and cameras"))
       .SetIcon("res/conditions/camera24.png");
+  extension.AddInstructionOrExpressionGroupMetadata(_("Effects"))
+      .SetIcon("res/actions/effect24.png");
 
   extension
       .AddExpressionAndConditionAndAction(
@@ -37,8 +39,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
           "",
           "res/conditions/camera24.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .UseStandardParameters("number")
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number (default : 0)"), "", true)
       .SetDefaultValue("0")
@@ -69,8 +71,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
           "",
           "res/conditions/camera24.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .UseStandardParameters("number")
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number (default : 0)"), "", true)
       .SetDefaultValue("0")
@@ -101,10 +103,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
           "",
           "res/conditions/camera24.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number"), "", true)
-      .UseStandardParameters("number")
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   extension
@@ -117,10 +119,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
           "",
           "res/conditions/camera24.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number"), "", true)
-      .UseStandardParameters("number")
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   extension
@@ -134,10 +136,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
           "",
           "res/conditions/camera24.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number"), "", true)
-      .UseStandardParameters("number")
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   extension
@@ -151,10 +153,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
           "",
           "res/conditions/camera24.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number"), "", true)
-      .UseStandardParameters("number")
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   extension
@@ -168,10 +170,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
           "",
           "res/conditions/camera24.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number"), "", true)
-      .UseStandardParameters("number")
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   extension
@@ -185,10 +187,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
           "",
           "res/conditions/camera24.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number"), "", true)
-      .UseStandardParameters("number")
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   extension
@@ -201,8 +203,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
           "",
           "res/conditions/camera24.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .UseStandardParameters("number")
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number (default : 0)"), "", true)
       .SetDefaultValue("0")
@@ -320,7 +322,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("expression",
                     _("Value (1:Initial zoom, 2:Zoom x2, 0.5:Unzoom x2...)"))
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number (default : 0)"), "", true)
       .SetDefaultValue("0");
@@ -352,46 +354,41 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                     "",
                     true)
       .SetDefaultValue("yes")
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number (default : 0)"), "", true)
       .SetDefaultValue("0")
       .MarkAsAdvanced();
 
   extension
-      .AddAction(
-          "ClampCamera",
-          _("Enforce camera boundaries"),
-          _("Enforce camera boundaries by moving the camera back inside specified boundaries."),
-          _("Enforce camera boundaries (left: _PARAM1_, top: _PARAM2_ "
-            "right: _PARAM3_, bottom: _PARAM4_, layer: _PARAM5_)"),
-          "",
-          "res/actions/camera24.png",
-          "res/actions/camera.png")
+      .AddAction("ClampCamera",
+                 _("Enforce camera boundaries"),
+                 _("Enforce camera boundaries by moving the camera back inside "
+                   "specified boundaries."),
+                 _("Enforce camera boundaries (left: _PARAM1_, top: _PARAM2_ "
+                   "right: _PARAM3_, bottom: _PARAM4_, layer: _PARAM5_)"),
+                 "",
+                 "res/actions/camera24.png",
+                 "res/actions/camera.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("expression",
-                    _("Left bound X Position"))
-      .AddParameter("expression",
-                    _("Top bound Y Position"))
-      .AddParameter("expression",
-                    _("Right bound X Position"))
-      .AddParameter("expression",
-                    _("Bottom bound Y Position"))
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("expression", _("Left bound X Position"))
+      .AddParameter("expression", _("Top bound Y Position"))
+      .AddParameter("expression", _("Right bound X Position"))
+      .AddParameter("expression", _("Bottom bound Y Position"))
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number (default : 0)"), "", true)
       .SetDefaultValue("0")
       .MarkAsAdvanced();
 
   extension
-      .AddAction(
-          "CentreCamera",
-          _("Center the camera on an object"),
-          _("Center the camera on the specified object."),
-          _("Center camera on _PARAM1_ (layer: _PARAM3_)"),
-          "",
-          "res/actions/camera24.png",
-          "res/actions/camera.png")
+      .AddAction("CentreCamera",
+                 _("Center the camera on an object"),
+                 _("Center the camera on the specified object."),
+                 _("Center camera on _PARAM1_ (layer: _PARAM3_)"),
+                 "",
+                 "res/actions/camera24.png",
+                 "res/actions/camera.png")
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("objectPtr", _("Object"))
       .AddParameter("yesorno",
@@ -399,7 +396,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                     "",
                     true)
       .SetDefaultValue("yes")
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number (default : 0)"), "", true)
       .SetDefaultValue("0")
@@ -453,10 +450,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                 "names) in the effects window."),
           _("Set _PARAM3_ to _PARAM4_ for effect _PARAM2_ of layer _PARAM1_"),
           _("Effects"),
-          "res/conditions/camera24.png",
-          "res/conditions/camera.png")
+          "res/actions/effect24.png",
+          "res/actions/effect.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("layerEffectName", _("Effect name"))
       .AddParameter("layerEffectParameterName", _("Parameter name"))
@@ -472,10 +469,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                 "names) in the effects window."),
           _("Set _PARAM3_ to _PARAM4_ for effect _PARAM2_ of layer _PARAM1_"),
           _("Effects"),
-          "res/conditions/camera24.png",
-          "res/conditions/camera.png")
+          "res/actions/effect24.png",
+          "res/actions/effect.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("layerEffectName", _("Effect name"))
       .AddParameter("layerEffectParameterName", _("Parameter name"))
@@ -491,10 +488,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                 "names) in the effects window."),
           _("Enable _PARAM3_ for effect _PARAM2_ of layer _PARAM1_: _PARAM4_"),
           _("Effects"),
-          "res/conditions/camera24.png",
-          "res/conditions/camera.png")
+          "res/actions/effect24.png",
+          "res/actions/effect.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("layerEffectName", _("Effect name"))
       .AddParameter("layerEffectParameterName", _("Parameter name"))
@@ -506,11 +503,11 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                     _("Layer effect is enabled"),
                     _("The effect on a layer is enabled"),
                     _("Effect _PARAM2_ on layer _PARAM1_ is enabled"),
-                    _("Effects"),
-                    "res/conditions/camera24.png",
-                    "res/conditions/camera.png")
+                    _(""),
+                    "res/actions/effect24.png",
+                    "res/actions/effect.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("layerEffectName", _("Effect name"))
       .MarkAsAdvanced();
@@ -521,10 +518,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                  _("Enable an effect on a layer"),
                  _("Enable effect _PARAM2_ on layer _PARAM1_: _PARAM3_"),
                  _("Effects"),
-                 "res/conditions/camera24.png",
-                 "res/conditions/camera.png")
+                 "res/actions/effect24.png",
+                 "res/actions/effect.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("layerEffectName", _("Effect name"))
       .AddParameter("yesorno", _("Enable"), "", true)
@@ -540,9 +537,12 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
           "res/conditions/time24.png",
           "res/conditions/time.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number",
+          gd::ParameterOptions::MakeNewOptions().SetDescription(
+              _("Time scale (1 by default)")))
       .MarkAsAdvanced();
 
   extension
@@ -555,7 +555,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
           "res/actions/time24.png",
           "res/actions/time.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression",
                     _("Scale (1: Default, 2: 2x faster, 0.5: 2x slower...)"));
@@ -570,9 +570,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                     "res/conditions/layer24.png",
                     "res/conditions/layer.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number", gd::ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   extension
@@ -586,7 +587,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                  "res/actions/layer24.png",
                  "res/actions/layer.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("New default Z order"));
 
@@ -597,11 +598,11 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
           _("Set the ambient light color of the lighting layer in format "
             "\"R;G;B\" string."),
           _("Set the ambient color of the lighting layer _PARAM1_ to _PARAM2_"),
-          _("Lighting"),
+          _(""),
           "res/actions/color24.png",
           "res/actions/color.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"Lighting\"")
       .AddParameter("color", _("Color"))
       .MarkAsAdvanced();

Core/GDCore/Extensions/Builtin/FileExtension.cpp

@@ -69,12 +69,12 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsFileExtension(
   extension
       .AddAction(
           "EcrireFichierExp",
-          _("Write a value"),
-          _("Write the result of the expression in the stored data, in the "
+          _("Save a value"),
+          _("Save the result of the expression in the stored data, in the "
             "specified element.\nSpecify the structure leading to the "
             "element using / (example : Root/Level/Current)\nSpaces are "
             "forbidden in element names."),
-          _("Write _PARAM2_ in _PARAM1_ of storage _PARAM0_"),
+          _("Save _PARAM2_ in _PARAM1_ of storage _PARAM0_"),
           "",
           "res/actions/fichier24.png",
           "res/actions/fichier.png")
@@ -85,12 +85,12 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsFileExtension(
   extension
       .AddAction(
           "EcrireFichierTxt",
-          _("Write a text"),
-          _("Write the text in the specified storage, in the specified "
+          _("Save a text"),
+          _("Save the text in the specified storage, in the specified "
             "element.\nSpecify "
             "the structure leading to the element using / (example : "
             "Root/Level/Current)\nSpaces are forbidden in element names."),
-          _("Write _PARAM2_ in _PARAM1_ of storage _PARAM0_"),
+          _("Save _PARAM2_ in _PARAM1_ of storage _PARAM0_"),
           "",
           "res/actions/fichier24.png",
           "res/actions/fichier.png")
@@ -101,13 +101,13 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsFileExtension(
   extension
       .AddAction(
           "LireFichierExp",
-          _("Read a value"),
-          _("Read the value saved in the specified element and store it in a "
+          _("Load a value"),
+          _("Load the value saved in the specified element and store it in a "
             "scene "
             "variable.\nSpecify the structure leading to the element using / "
             "(example : Root/Level/Current)\nSpaces are forbidden in element "
             "names."),
-          _("Read _PARAM1_ from storage _PARAM0_ and store value in _PARAM3_"),
+          _("Load _PARAM1_ from storage _PARAM0_ and store value in _PARAM3_"),
           "",
           "res/actions/fichier24.png",
           "res/actions/fichier.png")
@@ -119,13 +119,13 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsFileExtension(
   extension
       .AddAction(
           "LireFichierTxt",
-          _("Read a text"),
-          _("Read the text saved in the specified element and store it in a "
+          _("Load a text"),
+          _("Load the text saved in the specified element and store it in a "
             "scene "
             "variable.\nSpecify the structure leading to the element using / "
             "(example : Root/Level/Current)\nSpaces are forbidden in element "
             "names."),
-          _("Read _PARAM1_ from storage _PARAM0_ and store as text in "
+          _("Load _PARAM1_ from storage _PARAM0_ and store as text in "
             "_PARAM3_"),
           "",
           "res/actions/fichier24.png",

Core/GDCore/Extensions/Builtin/MathematicalToolsExtension.cpp

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

Core/GDCore/Extensions/Builtin/MouseExtension.cpp

@@ -27,6 +27,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsMouseExtension(
       .SetCategory("Input");
   extension.AddInstructionOrExpressionGroupMetadata(_("Mouse and touch"))
       .SetIcon("res/actions/mouse24.png");
+  extension.AddInstructionOrExpressionGroupMetadata(_("Multitouch"))
+      .SetIcon("res/conditions/touch24.png");
 
   extension
       .AddCondition(
@@ -153,42 +155,80 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsMouseExtension(
   extension
       .AddExpressionAndCondition(
           "number",
-          "MouseX",
+          "CursorX",
           _("Cursor X position"),
           _("the X position of the cursor or of a touch"),
           _("the cursor (or touch) X position"),
           "",
           "res/conditions/mouse24.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .UseStandardParameters("number")
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number (default : 0)"), "", true)
       .SetDefaultValue("0");
 
   // Support for deprecated names:
-  extension.AddDuplicatedCondition("SourisX", "MouseX").SetHidden();
-  extension.AddDuplicatedExpression("SourisX", "MouseX").SetHidden();
+  extension.AddDuplicatedCondition("MouseX", "CursorX").SetHidden();
+  extension.AddDuplicatedExpression("MouseX", "CursorX").SetHidden();
+  extension.AddDuplicatedCondition("SourisX", "CursorX").SetHidden();
+  extension.AddDuplicatedExpression("SourisX", "CursorX").SetHidden();
 
   extension
       .AddExpressionAndCondition(
           "number",
-          "MouseY",
+          "CursorY",
           _("Cursor Y position"),
           _("the Y position of the cursor or of a touch"),
           _("the cursor (or touch) Y position"),
           "",
           "res/conditions/mouse24.png")
       .AddCodeOnlyParameter("currentScene", "")
-      .UseStandardParameters("number")
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number (default : 0)"), "", true)
       .SetDefaultValue("0");
 
   // Support for deprecated names:
-  extension.AddDuplicatedCondition("SourisY", "MouseY").SetHidden();
-  extension.AddDuplicatedExpression("SourisY", "MouseY").SetHidden();
+  extension.AddDuplicatedCondition("MouseY", "CursorY").SetHidden();
+  extension.AddDuplicatedExpression("MouseY", "CursorY").SetHidden();
+  extension.AddDuplicatedCondition("SourisY", "CursorY").SetHidden();
+  extension.AddDuplicatedExpression("SourisY", "CursorY").SetHidden();
+
+  extension
+      .AddExpressionAndCondition("number",
+                                 "MouseOnlyCursorX",
+                                 _("Mouse cursor X position"),
+                                 _("the X position of the mouse cursor"),
+                                 _("the mouse cursor X position"),
+                                 "",
+                                 "res/conditions/mouse24.png")
+      .AddCodeOnlyParameter("currentScene", "")
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
+      .AddParameter("layer", _("Layer"), "", true)
+      .SetDefaultValue("\"\"")
+      .AddParameter("expression", _("Camera number (default : 0)"), "", true)
+      .SetDefaultValue("0")
+      // It's only useful for extensions as they can't use TouchSimulateMouse.
+      .SetHidden();
+
+  extension
+      .AddExpressionAndCondition("number",
+                                 "MouseOnlyCursorY",
+                                 _("Mouse cursor Y position"),
+                                 _("the Y position of the mouse cursor"),
+                                 _("the mouse cursor Y position"),
+                                 "",
+                                 "res/conditions/mouse24.png")
+      .AddCodeOnlyParameter("currentScene", "")
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
+      .AddParameter("layer", _("Layer"), "", true)
+      .SetDefaultValue("\"\"")
+      .AddParameter("expression", _("Camera number (default : 0)"), "", true)
+      .SetDefaultValue("0")
+      // It's only useful for extensions as they can't use TouchSimulateMouse.
+      .SetHidden();
 
   extension
       .AddCondition("IsMouseInsideCanvas",
@@ -276,8 +316,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsMouseExtension(
                                  "res/conditions/touch24.png")
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("expression", _("Touch identifier"))
-      .UseStandardParameters("number")
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number (default : 0)"), "", true)
       .SetDefaultValue("0");
@@ -292,8 +332,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsMouseExtension(
                                  "res/conditions/touch24.png")
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("expression", _("Touch identifier"))
-      .UseStandardParameters("number")
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number (default : 0)"), "", true)
       .SetDefaultValue("0");
@@ -334,44 +374,85 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsMouseExtension(
       .AddCondition(
           "HasAnyTouchStarted",
           _("A new touch has started"),
-          _("Check if a touch has just started on this frame. The touch identifiers can be "
+          _("Check if a touch has just started on this frame. The touch "
+            "identifiers can be "
             "accessed using StartedTouchId() and StartedTouchCount()."),
           _("A new touch has started"),
           _("Multitouch"),
           "res/conditions/touch24.png",
           "res/conditions/touch.png")
+      .AddCodeOnlyParameter("currentScene", "")
+      .SetHidden();
+
+  extension
+      .AddExpression("StartedTouchCount",
+                     _("Started touch count"),
+                     _("The number of touches that have just started on this "
+                       "frame. The touch identifiers can be "
+                       "accessed using StartedTouchId()."),
+                     _("Multitouch"),
+                     "res/conditions/touch.png")
+      .AddCodeOnlyParameter("currentScene", "")
+      .SetHidden();
+
+  extension
+      .AddExpression("StartedTouchId",
+                     _("Started touch identifier"),
+                     _("The identifier of the touch that has just started on "
+                       "this frame. The number of touches can be "
+                       "accessed using StartedTouchCount()."),
+                     _("Multitouch"),
+                     "res/conditions/touch.png")
+      .AddCodeOnlyParameter("currentScene", "")
+      .AddParameter("expression", _("Touch index"))
+      .SetHidden();
+
+  extension
+      .AddCondition(
+          "HasAnyTouchOrMouseStarted",
+          _("A new touch has started"),
+          _("Check if a touch has just started or the mouse left button has "
+            "been pressed on this frame. The touch identifiers can be "
+            "accessed using StartedTouchOrMouseId() and "
+            "StartedTouchOrMouseCount()."),
+          _("A new touch has started"),
+          _("Multitouch"),
+          "res/conditions/touch24.png",
+          "res/conditions/touch.png")
       .AddCodeOnlyParameter("currentScene", "");
 
   extension
       .AddExpression(
-          "StartedTouchCount",
+          "StartedTouchOrMouseCount",
           _("Started touch count"),
-          _("The number of touches that have just started on this frame. The touch identifiers can be "
-            "accessed using StartedTouchId()."),
+          _("The number of touches (including the mouse) that have just "
+            "started on this frame. The touch identifiers can be "
+            "accessed using StartedTouchOrMouseId()."),
           _("Multitouch"),
           "res/conditions/touch.png")
       .AddCodeOnlyParameter("currentScene", "");
 
   extension
       .AddExpression(
-          "StartedTouchId",
+          "StartedTouchOrMouseId",
           _("Started touch identifier"),
-          _("The identifier of the touch that has just started on this frame. The touch number of touches can be "
-            "accessed using StartedTouchCount()."),
+          _("The identifier of the touch or mouse that has just started on "
+            "this frame. The number of touches can be "
+            "accessed using StartedTouchOrMouseCount()."),
           _("Multitouch"),
           "res/conditions/touch.png")
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("expression", _("Touch index"));
 
   extension
-      .AddCondition(
-          "HasTouchEnded",
-          _("A touch has ended"),
-          _("Check if a touch has ended."),
-          _("The touch with identifier _PARAM1_ has ended"),
-          _("Multitouch"),
-          "res/conditions/touch24.png",
-          "res/conditions/touch.png")
+      .AddCondition("HasTouchEnded",
+                    _("A touch has ended"),
+                    _("Check if a touch has ended or a mouse left button has "
+                      "been released."),
+                    _("The touch with identifier _PARAM1_ has ended"),
+                    _("Multitouch"),
+                    "res/conditions/touch24.png",
+                    "res/conditions/touch.png")
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("expression", _("Touch identifier"));
 

Core/GDCore/Extensions/Builtin/NetworkExtension.cpp

@@ -48,7 +48,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsNetworkExtension(
       .AddParameter("string", "Content type", "", true)
       .SetParameterLongDescription(
           "If empty, \"application/x-www-form-urlencoded\" will be used.")
-      .AddParameter("scenevar", "Reponse scene variable", "", true)
+      .AddParameter("scenevar", "Response scene variable", "", true)
       .SetParameterLongDescription(
           "The response of the server will be stored, as a string, in this "
           "variable. If the server returns *JSON*, you may want to use the "

Core/GDCore/Extensions/Builtin/SceneExtension.cpp

@@ -54,6 +54,19 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSceneExtension(
       .AddCodeOnlyParameter("currentScene", "")
       .MarkAsSimple();
 
+  extension
+      .AddCondition("DoesSceneExist",
+                    _("Does scene exist"),
+                    _("Check if scene exists."),
+                    _("Scene _PARAM1_ exists"),
+                    "",
+                    "res/actions/texte.png",
+                    "res/actions/texte.png")
+      .SetHelpPath("/interface/scene-editor/events")
+      .AddCodeOnlyParameter("currentScene", "")
+      .AddParameter("sceneName", _("Name of the scene to check"))
+      .MarkAsSimple();
+
   extension
       .AddAction("Scene",
                  _("Change the scene"),
@@ -136,6 +149,20 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSceneExtension(
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("yesorno", _("Deactivate input when focus is lost"))
       .MarkAsAdvanced();
+
+  extension
+      .AddCondition(
+          "HasGameJustResumed",
+          _("Game has just resumed"),
+          _("Check if the game has just resumed from being hidden. It "
+            "happens when the game tab is selected, a minimized window is "
+            "restored or the application is put back on front."),
+          _("Game has just resumed"),
+          "",
+          "res/actions/window24.png",
+          "res/actions/window.png")
+      .SetHelpPath("/interface/scene-editor/events")
+      .AddCodeOnlyParameter("currentScene", "");
 }
 
 }  // namespace gd

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

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

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

@@ -4,13 +4,15 @@
  * reserved. This project is released under the MIT License.
  */
 #include "Polygon2d.h"
-#include "GDCore/Vector2.h"
+
 #include <cmath>
 #include <iostream>
 
-void Polygon2d::Rotate(float angle) {
-  float t, cosa = cos(-angle),
-           sina = sin(-angle);  // We want a clockwise rotation
+#include "GDCore/Vector2.h"
+
+void Polygon2d::Rotate(double angle) {
+  double t, cosa = cos(-angle),
+            sina = sin(-angle);  // We want a clockwise rotation
 
   for (std::size_t i = 0; i < vertices.size(); ++i) {
     t = vertices[i].x;
@@ -19,7 +21,7 @@ void Polygon2d::Rotate(float angle) {
   }
 }
 
-void Polygon2d::Move(float x, float y) {
+void Polygon2d::Move(double x, double y) {
   for (std::size_t i = 0; i < vertices.size(); i++) {
     vertices[i].x += x;
     vertices[i].y += y;
@@ -50,13 +52,13 @@ bool Polygon2d::IsConvex() const {
       (edges[0].x * edges[0 + 1].y - edges[0].y * edges[0 + 1].x) > 0;
 
   for (std::size_t i = 1; i < edges.size() - 1; ++i) {
-    float zCrossProduct =
+    double zCrossProduct =
         edges[i].x * edges[i + 1].y - edges[i].y * edges[i + 1].x;
     if ((zCrossProduct > 0) != zProductIsPositive) return false;
   }
 
-  float lastZCrossProduct = edges[edges.size() - 1].x * edges[0].y -
-                            edges[edges.size() - 1].y * edges[0].x;
+  double lastZCrossProduct = edges[edges.size() - 1].x * edges[0].y -
+                             edges[edges.size() - 1].y * edges[0].x;
   if ((lastZCrossProduct > 0) != zProductIsPositive) return false;
 
   return true;
@@ -75,7 +77,7 @@ gd::Vector2f Polygon2d::ComputeCenter() const {
   return center;
 }
 
-Polygon2d Polygon2d::CreateRectangle(float width, float height) {
+Polygon2d Polygon2d::CreateRectangle(double width, double height) {
   Polygon2d rect;
   rect.vertices.push_back(gd::Vector2f(-width / 2.0f, -height / 2.0f));
   rect.vertices.push_back(gd::Vector2f(+width / 2.0f, -height / 2.0f));

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

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

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

@@ -44,7 +44,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                 "res/actions/opacity.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Opacity (0-255)")))
       .MarkAsSimple();
 
   obj.AddAction("ChangeAnimation",
@@ -57,7 +60,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                 "res/actions/animation.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters("number",
+                                     ParameterOptions::MakeNewOptions())
       .MarkAsSimple();
 
   obj.AddAction("SetAnimationName",
@@ -86,7 +90,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
       .SetHidden()  // Hide as 8 direction is not supported officially in the
                     // interface.
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters("number",
+                                     ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   obj.AddAction("ChangeSprite",
@@ -98,7 +103,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                 "res/actions/sprite.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters("number",
+                                     ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   obj.AddAction("PauseAnimation",
@@ -134,7 +140,9 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
          "res/actions/animation.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(_("Speed scale")))
       .MarkAsSimple();
 
   obj.AddAction("TourneVersPos",
@@ -162,7 +170,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                 "res/actions/scale_black.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Scale (1 by default)")))
       .MarkAsAdvanced();
 
   obj.AddAction("ChangeScaleWidth",
@@ -174,7 +185,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                 "res/actions/scaleWidth_black.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Scale (1 by default)")))
       .MarkAsAdvanced();
 
   obj.AddAction("ChangeScaleHeight",
@@ -186,7 +200,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                 "res/actions/scaleHeight_black.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Scale (1 by default)")))
       .MarkAsAdvanced();
 
   obj.AddAction("ChangeWidth",
@@ -198,7 +215,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                 "res/actions/scaleWidth_black.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters("number",
+                                     ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   obj.AddCondition("Width",
@@ -210,7 +228,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                    "res/conditions/scaleWidth_black.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   obj.AddAction("ChangeHeight",
@@ -222,7 +241,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                 "res/actions/scaleHeight_black.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters("number",
+                                     ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   obj.AddCondition("Height",
@@ -234,7 +254,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                    "res/conditions/scaleHeight_black.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   obj.AddAction("SetSize",
@@ -260,12 +281,13 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
          "res/conditions/animation.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   obj.AddCondition("AnimationName",
                    _("Current animation name"),
-                   _("Check the animation by played by the object."),
+                   _("Check the animation played by the object."),
                    _("The animation of _PARAM0_ is _PARAM1_"),
                    _("Animations and images"),
                    "res/conditions/animation24.png",
@@ -288,7 +310,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
       .SetHidden()  // Hide as 8 direction is not supported officially in the
                     // interface.
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardRelationalOperatorParameters("number");
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions());
 
   obj.AddCondition("Sprite",
                    _("Current frame"),
@@ -301,7 +324,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                    "res/conditions/sprite.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   obj.AddCondition("AnimStopped",
@@ -349,7 +373,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                    "res/conditions/scaleWidth_black.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Scale (1 by default)")))
       .MarkAsAdvanced();
 
   obj.AddCondition("ScaleHeight",
@@ -361,7 +388,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                    "res/conditions/scaleHeight_black.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Scale (1 by default)")))
       .MarkAsAdvanced();
 
   obj.AddCondition("Opacity",
@@ -374,7 +404,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                    "res/conditions/opacity.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(
+              _("Opacity to compare to (0-255)")))
       .MarkAsSimple();
 
   obj.AddCondition(
@@ -387,7 +420,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
          "res/conditions/opacity.png")
 
       .AddParameter("object", _("Object"), "Sprite")
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   obj.AddAction("ChangeColor",
@@ -549,7 +583,14 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
 
   obj.AddExpression("Sprite",
                     _("Image"),
-                    _("Animation frame of the object"),
+                    _("Current frame of the animation of the object"),
+                    _("Animations and images"),
+                    "res/actions/sprite.png")
+      .AddParameter("object", _("Object"), "Sprite");
+
+  obj.AddExpression("AnimationFrameCount",
+                    _("Number of frames"),
+                    _("Number of frames in the current animation of the object"),
                     _("Animations and images"),
                     "res/actions/sprite.png")
       .AddParameter("object", _("Object"), "Sprite");

Core/GDCore/Extensions/Builtin/StringInstructionsExtension.cpp

@@ -126,8 +126,8 @@ BuiltinExtensionsImplementer::ImplementsStringInstructionsExtension(
   extension
       .AddExpression(
           "StrFindLast",
-          _("Search the last occurence in a text"),
-          _("Search the last occurence in a string (return the position of "
+          _("Search the last occurrence in a text"),
+          _("Search the last occurrence in a string (return the position of "
             "the result, from the beginning of the string, or -1 if not "
             "found)"),
           "",
@@ -169,10 +169,10 @@ BuiltinExtensionsImplementer::ImplementsStringInstructionsExtension(
   extension
       .AddExpression(
           "StrFindLastFrom",
-          _("Search the last occurence in a text, starting from a position"),
-          _("Search in a text the last occurence, starting from a position "
+          _("Search the last occurrence in a text, starting from a position"),
+          _("Search in a text the last occurrence, starting from a position "
             "(return "
-            " the position of the result, from the beginning of the string, or "
+            "the position of the result, from the beginning of the string, or "
             "-1 if not found)"),
           "",
           "res/conditions/toujours24_black.png")
@@ -183,6 +183,26 @@ BuiltinExtensionsImplementer::ImplementsStringInstructionsExtension(
                     _("Position of the last character in the string to be "
                       "considered in the search"));
 
+  extension
+      .AddStrExpression("StrReplaceOne",
+                        _("Replace the first occurrence of a text by another."),
+                        _("Replace the first occurrence of a text by another."),
+                        "",
+                        "res/conditions/toujours24_black.png")
+      .AddParameter("string", _("Text in which the replacement must be done"))
+      .AddParameter("string", _("Text to find inside the first text"))
+      .AddParameter("string", _("Replacement to put instead of the text to find"));
+
+  extension
+      .AddStrExpression("StrReplaceAll",
+                        _("Replace all occurrences of a text by another."),
+                        _("Replace all occurrences of a text by another."),
+                        "",
+                        "res/conditions/toujours24_black.png")
+      .AddParameter("string", _("Text in which the replacement(s) must be done"))
+      .AddParameter("string", _("Text to find inside the first text"))
+      .AddParameter("string", _("Replacement to put instead of the text to find"));
+
 }
 
 }  // namespace gd

Core/GDCore/Extensions/Builtin/TimeExtension.cpp

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

Core/GDCore/Extensions/Builtin/VariablesExtension.cpp

@@ -27,30 +27,32 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
 
   extension
       .AddCondition("VarScene",
-                    _("Value of a scene variable"),
-                    _("Compare the value of a scene variable."),
-                    _("the scene variable _PARAM0_"),
+                    _("Number variable"),
+                    _("Compare the number value of a scene variable."),
+                    _("The number of scene variable _PARAM0_"),
                     _("Scene variables"),
                     "res/conditions/var24.png",
                     "res/conditions/var.png")
       .AddParameter("scenevar", _("Variable"))
-      .UseStandardRelationalOperatorParameters("number");
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions());
 
   extension
       .AddCondition("VarSceneTxt",
-                    _("Text of a scene variable"),
-                    _("Compare the text of a scene variable."),
-                    _("the text of scene variable _PARAM0_"),
+                    _("Text variable"),
+                    _("Compare the text (string) of a scene variable."),
+                    _("The text of scene variable _PARAM0_"),
                     _("Scene variables"),
                     "res/conditions/var24.png",
                     "res/conditions/var.png")
       .AddParameter("scenevar", _("Variable"))
-      .UseStandardRelationalOperatorParameters("string");
+      .UseStandardRelationalOperatorParameters(
+          "string", ParameterOptions::MakeNewOptions());
 
   extension
       .AddCondition(
           "SceneVariableAsBoolean",
-          _("Boolean value of a scene variable"),
+          _("Boolean variable"),
           _("Compare the boolean value of a scene variable."),
           _("The boolean value of scene variable _PARAM0_ is _PARAM1_"),
           _("Scene variables"),
@@ -61,14 +63,14 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
       .SetDefaultValue("true");
 
   extension
-      .AddCondition(
-          "VariableChildExists",
-          _("Child existence"),
-          _("Check if the specified child of the scene variable exists."),
-          _("Child _PARAM1_ of scene variable _PARAM0_ exists"),
-          _("Scene variables/Collections/Structures"),
-          "res/conditions/var24.png",
-          "res/conditions/var.png")
+      .AddCondition("VariableChildExists",
+                    _("Child existence"),
+                    _("Check if the specified child of the scene structure "
+                      "variable exists."),
+                    _("Child _PARAM1_ of scene variable _PARAM0_ exists"),
+                    _("Scene variables/Arrays and structures"),
+                    "res/conditions/var24.png",
+                    "res/conditions/var.png")
       .AddParameter("scenevar", _("Variable"))
       .AddParameter("string", _("Name of the child"))
       .MarkAsAdvanced();
@@ -76,10 +78,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
   extension
       .AddCondition("GlobalVariableChildExists",
                     _("Child existence"),
-                    _("Check if the specified child of the global "
+                    _("Check if the specified child of the global structure "
                       "variable exists."),
                     _("Child _PARAM1_ of global variable _PARAM0_ exists"),
-                    _("Global variables/Collections/Structures"),
+                    _("Global variables/Arrays and structures"),
                     "res/conditions/var24.png",
                     "res/conditions/var.png")
       .AddParameter("globalvar", _("Variable"))
@@ -88,7 +90,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
 
   extension
       .AddCondition("VarSceneDef",
-                    "Test if a scene variable is defined",
+                    "Variable defined",
                     "Test if the scene variable exists.",
                     "Scene variable _PARAM0_ is defined",
                     _("Scene variables"),
@@ -96,36 +98,38 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
                     "res/conditions/var.png")
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("string", _("Variable"))
-      .SetHidden();
+      .SetHidden();  // Deprecated.
 
   extension
       .AddCondition("VarGlobal",
-                    _("Value of a global variable"),
-                    _("Compare the value of a global variable."),
+                    _("Number variable"),
+                    _("Compare the number value of a global variable."),
                     _("the global variable _PARAM0_"),
                     _("Global variables"),
                     "res/conditions/var24.png",
                     "res/conditions/var.png")
       .AddParameter("globalvar", _("Variable"))
-      .UseStandardRelationalOperatorParameters("number")
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   extension
       .AddCondition("VarGlobalTxt",
-                    _("Text of a global variable"),
-                    _("Compare the text of a global variable."),
+                    _("Text variable"),
+                    _("Compare the text (string) of a global variable."),
                     _("the text of the global variable _PARAM0_"),
                     _("Global variables"),
                     "res/conditions/var24.png",
                     "res/conditions/var.png")
       .AddParameter("globalvar", _("Variable"))
-      .UseStandardRelationalOperatorParameters("string")
+      .UseStandardRelationalOperatorParameters(
+          "string", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   extension
       .AddCondition(
           "GlobalVariableAsBoolean",
-          _("Boolean value of a global variable"),
+          _("Boolean variable"),
           _("Compare the boolean value of a global variable."),
           _("The boolean value of global variable _PARAM0_ is _PARAM1_"),
           _("Global variables"),
@@ -137,8 +141,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
 
   extension
       .AddCondition("VarGlobalDef",
-                    "Test if a global variable is defined",
-                    "Test if a global variable exists",
+                    "Variable defined",
+                    "Test if a global variable exists.",
                     "Global variable _PARAM0_ is defined",
                     _("Global variables"),
                     "res/conditions/var24.png",
@@ -146,34 +150,36 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("string", _("Variable"))
       .MarkAsAdvanced()
-      .SetHidden();
+      .SetHidden();  // Deprecated.
 
   extension
       .AddAction("ModVarScene",
-                 _("Value of a scene variable"),
-                 _("Change the value of a scene variable."),
+                 _("Change number variable"),
+                 _("Modify the number value of a scene variable."),
                  _("the scene variable _PARAM0_"),
                  _("Scene variables"),
                  "res/actions/var24.png",
                  "res/actions/var.png")
       .AddParameter("scenevar", _("Variable"))
-      .UseStandardOperatorParameters("number");
+      .UseStandardOperatorParameters("number",
+                                     ParameterOptions::MakeNewOptions());
 
   extension
       .AddAction("ModVarSceneTxt",
-                 _("String of a scene variable"),
-                 _("Modify the text of a scene variable."),
+                 _("Change text variable"),
+                 _("Modify the text (string) of a scene variable."),
                  _("the text of scene variable _PARAM0_"),
                  _("Scene variables"),
                  "res/actions/var24.png",
                  "res/actions/var.png")
       .AddParameter("scenevar", _("Variable"))
-      .UseStandardOperatorParameters("string");
+      .UseStandardOperatorParameters("string",
+                                     ParameterOptions::MakeNewOptions());
 
   extension
       .AddAction(
           "SetSceneVariableAsBoolean",
-          _("Boolean value of a scene variable"),
+          _("Change boolean variable"),
           _("Modify the boolean value of a scene variable."),
           _("Set the boolean value of scene variable _PARAM0_ to _PARAM1_"),
           _("Scene variables"),
@@ -184,7 +190,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
 
   extension
       .AddAction("ToggleSceneVariableAsBoolean",
-                 _("Toggle boolean value of a scene variable"),
+                 _("Toggle boolean variable"),
                  _("Toggle the boolean value of a scene variable.") + "\n" +
                      _("If it was true, it will become false, and if it was "
                        "false it will become true."),
@@ -196,32 +202,34 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
 
   extension
       .AddAction("ModVarGlobal",
-                 _("Value of a global variable"),
-                 _("Change the value of a global variable"),
+                 _("Change number variable"),
+                 _("Modify the number value of a global variable."),
                  _("the global variable _PARAM0_"),
                  _("Global variables"),
                  "res/actions/var24.png",
                  "res/actions/var.png")
       .AddParameter("globalvar", _("Variable"))
-      .UseStandardOperatorParameters("number")
+      .UseStandardOperatorParameters("number",
+                                     ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   extension
       .AddAction("ModVarGlobalTxt",
-                 _("String of a global variable"),
-                 _("Modify the text of a global variable."),
+                 _("Change text variable"),
+                 _("Modify the text (string) of a global variable."),
                  _("the text of global variable _PARAM0_"),
                  _("Global variables"),
                  "res/actions/var24.png",
                  "res/actions/var.png")
       .AddParameter("globalvar", _("Variable"))
-      .UseStandardOperatorParameters("string")
+      .UseStandardOperatorParameters("string",
+                                     ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
   extension
       .AddAction(
           "SetGlobalVariableAsBoolean",
-          _("Boolean value of a global variable"),
+          _("Change boolean variable"),
           _("Modify the boolean value of a global variable."),
           _("Set the boolean value of global variable _PARAM0_ to _PARAM1_"),
           _("Global variables"),
@@ -232,7 +240,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
 
   extension
       .AddAction("ToggleGlobalVariableAsBoolean",
-                 _("Toggle boolean value of a global variable"),
+                 _("Toggle boolean variable"),
                  _("Toggle the boolean value of a global variable.") + "\n" +
                      _("If it was true, it will become false, and if it was "
                        "false it will become true."),
@@ -243,202 +251,324 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
       .AddParameter("globalvar", _("Variable"));
 
   extension
-      .AddAction("VariableRemoveChild",
-                 _("Remove a child"),
-                 _("Remove a child from a scene variable."),
-                 _("Remove child _PARAM1_ from scene variable _PARAM0_"),
-                 _("Scene variables/Collections/Structures"),
-                 "res/actions/var24.png",
-                 "res/actions/var.png")
-      .AddParameter("scenevar", _("Variable"))
+      .AddAction(
+          "VariableRemoveChild",
+          _("Remove a child"),
+          _("Remove a child from a scene structure variable."),
+          _("Remove child _PARAM1_ from scene structure variable _PARAM0_"),
+          _("Scene variables/Arrays and structures"),
+          "res/actions/var24.png",
+          "res/actions/var.png")
+      .AddParameter("scenevar", _("Structure variable"))
       .AddParameter("string", _("Child's name"))
       .MarkAsAdvanced();
 
   extension
-      .AddAction("GlobalVariableRemoveChild",
-                 _("Remove a child"),
-                 _("Remove a child from a global variable."),
-                 _("Remove child _PARAM1_ from global variable _PARAM0_"),
-                 _("Global variables/Collections/Structures"),
-                 "res/actions/var24.png",
-                 "res/actions/var.png")
-      .AddParameter("globalvar", _("Variable"))
+      .AddAction(
+          "GlobalVariableRemoveChild",
+          _("Remove a child"),
+          _("Remove a child from a global structure variable."),
+          _("Remove child _PARAM1_ from global structure variable _PARAM0_"),
+          _("Global variables/Arrays and structures"),
+          "res/actions/var24.png",
+          "res/actions/var.png")
+      .AddParameter("globalvar", _("Structure variable"))
       .AddParameter("string", _("Child's name"))
       .MarkAsAdvanced();
 
   extension
       .AddAction("VariableClearChildren",
-                 _("Clear scene variable"),
-                 _("Remove all the children from the scene variable."),
+                 _("Clear children"),
+                 _("Remove all the children from the scene structure or array "
+                   "variable."),
                  _("Clear children from scene variable _PARAM0_"),
-                 _("Scene variables/Collections"),
+                 _("Scene variables/Arrays and structures"),
                  "res/actions/var24.png",
                  "res/actions/var.png")
-      .AddParameter("scenevar", _("Variable"))
+      .AddParameter("scenevar", _("Structure or array variable"))
       .MarkAsAdvanced();
 
   extension
       .AddAction("GlobalVariableClearChildren",
-                 _("Clear global variable"),
-                 _("Remove all the children from the global variable."),
+                 _("Clear children"),
+                 _("Remove all the children from the global structure or array "
+                   "variable."),
                  _("Clear children from global variable _PARAM0_"),
-                 _("Global variables/Collections"),
+                 _("Global variables/Arrays and structures"),
                  "res/actions/var24.png",
                  "res/actions/var.png")
-      .AddParameter("globalvar", _("Variable"))
+      .AddParameter("globalvar", _("Structure or array variable"))
       .MarkAsAdvanced();
 
   extension
       .AddAction("SceneVariablePush",
-                 _("Append variable to a scene array"),
-                 _("Appends a variable at the end of a scene array variable."),
-                 _("Append variable _PARAM1_ to array variable _PARAM0_"),
-                 _("Scene variables/Collections/Arrays"),
+                 _("Add existing variable"),
+                 _("Adds an existing variable at the end of a scene array "
+                   "variable."),
+                 _("Add variable _PARAM1_ to array variable _PARAM0_"),
+                 _("Scene variables/Arrays and structures"),
                  "res/actions/var24.png",
                  "res/actions/var.png")
       .AddParameter("scenevar", _("Array variable"))
-      .AddParameter("scenevar", _("Scene variable with the content to append"))
-      .SetParameterLongDescription(_("The content of the variable will *be copied* and appended at the end of the array."))
+      .AddParameter("scenevar", _("Scene variable with the content to add"))
+      .SetParameterLongDescription(
+          _("The content of the variable will *be copied* and added at the "
+            "end of the array."))
       .MarkAsAdvanced();
 
   extension
-      .AddAction("SceneVariablePushString",
-                 _("Append a string to a scene array"),
-                 _("Appends a string at the end of a scene array variable."),
-                 _("Append string _PARAM1_ to array variable _PARAM0_"),
-                 _("Scene variables/Collections/Arrays"),
-                 "res/actions/var24.png",
-                 "res/actions/var.png")
+      .AddAction(
+          "SceneVariablePushString",
+          _("Add text variable"),
+          _("Adds a text (string) at the end of a scene array variable."),
+          _("Add text _PARAM1_ to array variable _PARAM0_"),
+          _("Scene variables/Arrays and structures"),
+          "res/actions/var24.png",
+          "res/actions/var.png")
       .AddParameter("scenevar", _("Array variable"))
-      .AddParameter("string", _("String to append"))
+      .AddParameter("string", _("Text to add"))
       .MarkAsAdvanced();
 
   extension
       .AddAction("SceneVariablePushNumber",
-                 _("Append a number to a scene array"),
-                 _("Appends a number at the end of a scene array variable."),
-                 _("Append number _PARAM1_ to array variable _PARAM0_"),
-                 _("Scene variables/Collections/Arrays"),
+                 _("Add number variable"),
+                 _("Adds a number at the end of a scene array variable."),
+                 _("Add number _PARAM1_ to array variable _PARAM0_"),
+                 _("Scene variables/Arrays and structures"),
                  "res/actions/var24.png",
                  "res/actions/var.png")
       .AddParameter("scenevar", _("Array variable"))
-      .AddParameter("expression", _("Number to append"))
+      .AddParameter("expression", _("Number to add"))
       .MarkAsAdvanced();
 
   extension
       .AddAction("SceneVariablePushBool",
-                 _("Append a boolean to a scene array"),
-                 _("Appends a boolean at the end of a scene array variable."),
-                 _("Append boolean _PARAM1_ to array variable _PARAM0_"),
-                 _("Scene variables/Collections/Arrays"),
+                 _("Add boolean variable"),
+                 _("Adds a boolean at the end of a scene array variable."),
+                 _("Add boolean _PARAM1_ to array variable _PARAM0_"),
+                 _("Scene variables/Arrays and structures"),
                  "res/actions/var24.png",
                  "res/actions/var.png")
       .AddParameter("scenevar", _("Array variable"))
-      .AddParameter("trueorfalse", _("Boolean to append"))
+      .AddParameter("trueorfalse", _("Boolean to add"))
       .MarkAsAdvanced();
 
   extension
-      .AddAction(
-          "SceneVariableRemoveAt",
-          _("Remove variable from a scene array (by index)"),
-          _("Removes a variable at the specified index of a scene array variable."),
-          _("Remove variable at index _PARAM1_ from scene array variable _PARAM0_"),
-          _("Scene variables/Collections/Arrays"),
-          "res/actions/var24.png",
-          "res/actions/var.png")
-      .AddParameter("scenevar", _("Variable"))
+      .AddAction("SceneVariableRemoveAt",
+                 _("Remove variable by index"),
+                 _("Removes a variable at the specified index of a scene array "
+                   "variable."),
+                 _("Remove variable at index _PARAM1_ from scene array "
+                   "variable _PARAM0_"),
+                 _("Scene variables/Arrays and structures"),
+                 "res/actions/var24.png",
+                 "res/actions/var.png")
+      .AddParameter("scenevar", _("Array variable"))
       .AddParameter("expression", _("Index to remove"))
       .MarkAsAdvanced();
 
   extension
-      .AddAction("GlobalVariablePush",
-                 _("Append variable to a global array"),
-                 _("Appends a variable at the end of a global array variable."),
-                 _("Append variable _PARAM1_ to array variable _PARAM0_"),
-                 _("Global variables/Collections/Arrays"),
-                 "res/actions/var24.png",
-                 "res/actions/var.png")
-      .AddParameter("globalvar", _("Array variable"))
-      .AddParameter("scenevar", _("Scene variable with the content to append"))
-      .SetParameterLongDescription(_("The content of the variable will *be copied* and appended at the end of the array."))
+      .AddCondition(
+          "SceneVariableChildCount",
+          _("Number of children"),
+          _("Compare the number of children in a scene array variable."),
+          _("The number of children in the array variable _PARAM0_"),
+          _("Scene variables/Arrays and structures"),
+          "res/conditions/var24.png",
+          "res/conditions/var.png")
+      .AddParameter("scenevar", _("Array variable"))
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
+  extension
+      .AddStrExpression(
+          "SceneVariableFirstString",
+          _("First text child"),
+          _("Get the value of the first element of a scene array variable, if "
+            "it is a text (string)."),
+          _("Scene variables/Arrays and structures"),
+          "res/actions/var.png")
+      .AddParameter("scenevar", _("Array variable"));
+
+  extension
+      .AddExpression(
+          "SceneVariableFirstNumber",
+          _("First number child"),
+          _("Get the value of the first element of a scene array variable, if "
+            "it is a number."),
+          _("Scene variables/Arrays and structures"),
+          "res/actions/var.png")
+      .AddParameter("scenevar", _("Array variable"));
+
+  extension
+      .AddStrExpression(
+          "SceneVariableLastString",
+          _("Last text child"),
+          _("Get the value of the last element of a scene array variable, if "
+            "it is a text (string)."),
+          _("Scene variables/Arrays and structures"),
+          "res/actions/var.png")
+      .AddParameter("scenevar", _("Array variable"));
+
+  extension
+      .AddExpression(
+          "SceneVariableLastNumber",
+          _("Last number child"),
+          _("Get the value of the last element of a scene array variable, if "
+            "it is a number."),
+          _("Scene variables/Arrays and structures"),
+          "res/actions/var.png")
+      .AddParameter("scenevar", _("Array variable"));
+
   extension
       .AddAction(
-          "GlobalVariableRemoveAt",
-          _("Remove variable from a global array (by index)"),
-          _("Removes a variable at the specified index of a global array variable."),
-          _("Remove variable at index _PARAM1_ from global array variable _PARAM0_"),
-          _("Global variables/Collections/Arrays"),
+          "GlobalVariablePush",
+          _("Add existing variable"),
+          _("Adds an existing variable at the end of a global array variable."),
+          _("Add variable _PARAM1_ to array variable _PARAM0_"),
+          _("Global variables/Arrays and structures"),
           "res/actions/var24.png",
           "res/actions/var.png")
-      .AddParameter("globalvar", _("Variable"))
+      .AddParameter("globalvar", _("Array variable"))
+      .AddParameter("scenevar", _("Scene variable with the content to add"))
+      .SetParameterLongDescription(
+          _("The content of the variable will *be copied* and added at the "
+            "end of the array."))
+      .MarkAsAdvanced();
+
+  extension
+      .AddAction("GlobalVariableRemoveAt",
+                 _("Remove variable by index"),
+                 _("Removes a variable at the specified index of a global "
+                   "array variable."),
+                 _("Remove variable at index _PARAM1_ from global array "
+                   "variable _PARAM0_"),
+                 _("Global variables/Arrays and structures"),
+                 "res/actions/var24.png",
+                 "res/actions/var.png")
+      .AddParameter("globalvar", _("Array variable"))
       .AddParameter("expression", _("Index to remove"))
       .MarkAsAdvanced();
 
   extension
-      .AddAction("GlobalVariablePushString",
-                 _("Append a string to a global array"),
-                 _("Appends a string at the end of a global array variable."),
-                 _("Append string _PARAM1_ to array variable _PARAM0_"),
-                 _("Global variables/Collections/Arrays"),
-                 "res/actions/var24.png",
-                 "res/actions/var.png")
+      .AddAction(
+          "GlobalVariablePushString",
+          _("Add text variable"),
+          _("Adds a text (string) at the end of a global array variable."),
+          _("Add text _PARAM1_ to array variable _PARAM0_"),
+          _("Global variables/Arrays and structures"),
+          "res/actions/var24.png",
+          "res/actions/var.png")
       .AddParameter("globalvar", _("Array variable"))
-      .AddParameter("string", _("String to append"))
+      .AddParameter("string", _("Text to add"))
       .MarkAsAdvanced();
 
   extension
       .AddAction("GlobalVariablePushNumber",
-                 _("Append a number to a global array"),
-                 _("Appends a number at the end of a global array variable."),
-                 _("Append number _PARAM1_ to array variable _PARAM0_"),
-                 _("Global variables/Collections/Arrays"),
+                 _("Add number variable"),
+                 _("Adds a number at the end of a global array variable."),
+                 _("Add number _PARAM1_ to array variable _PARAM0_"),
+                 _("Global variables/Arrays and structures"),
                  "res/actions/var24.png",
                  "res/actions/var.png")
       .AddParameter("globalvar", _("Array variable"))
-      .AddParameter("expression", _("Number to append"))
+      .AddParameter("expression", _("Number to add"))
       .MarkAsAdvanced();
 
   extension
       .AddAction("GlobalVariablePushBool",
-                 _("Append a boolean to a global array"),
-                 _("Appends a boolean at the end of a global array variable."),
-                 _("Append boolean _PARAM1_ to array variable _PARAM0_"),
-                 _("Global variables/Collections/Arrays"),
+                 _("Add boolean variable"),
+                 _("Adds a boolean at the end of a global array variable."),
+                 _("Add boolean _PARAM1_ to array variable _PARAM0_"),
+                 _("Global variables/Arrays and structures"),
                  "res/actions/var24.png",
                  "res/actions/var.png")
       .AddParameter("globalvar", _("Array variable"))
-      .AddParameter("trueorfalse", _("Boolean to append"))
+      .AddParameter("trueorfalse", _("Boolean to add"))
       .MarkAsAdvanced();
 
   extension
-      .AddExpression("GlobalVariableChildCount",
-                     _("Number of children of a global variable"),
-                     _("Number of children of a global variable"),
-                     _("Global variables"),
+      .AddCondition(
+          "GlobalVariableChildCount",
+          _("Number of children"),
+          _("Compare the number of children in a global array variable."),
+          _("The number of children of the array variable _PARAM0_"),
+          _("Global variables/Arrays and structures"),
+          "res/conditions/var24.png",
+          "res/conditions/var.png")
+      .AddParameter("globalvar", _("Array variable"))
+      .UseStandardRelationalOperatorParameters(
+          "number", ParameterOptions::MakeNewOptions())
+      .MarkAsAdvanced();
+
+  extension
+      .AddStrExpression("GlobalVariableFirstString",
+                        _("First text child"),
+                        _("Value of the first element of a global array "
+                          "variable, if it is a text (string) variable."),
+                        _("Global variables/Arrays and structures"),
+                        "res/actions/var.png")
+      .AddParameter("globalvar", _("Array variable"));
+
+  extension
+      .AddExpression("GlobalVariableFirstNumber",
+                     _("First number child"),
+                     _("Value of the first element of a global array "
+                       "variable, if it is a number variable"),
+                     _("Global variables/Arrays and structures"),
                      "res/actions/var.png")
-      .AddParameter("globalvar", _("Variable"));
+      .AddParameter("globalvar", _("Array variable"));
+
+  extension
+      .AddStrExpression(
+          "GlobalVariableLastString",
+          _("Last text child"),
+          _("Value of the last element of a global array variable, if "
+            "it is a text (string) variable."),
+          _("Global variables/Arrays and structures"),
+          "res/actions/var.png")
+      .AddParameter("globalvar", _("Array variable"));
+
+  extension
+      .AddExpression(
+          "GlobalVariableLastNumber",
+          _("Last number child"),
+          _("Value of the last element of a global array variable, if "
+            "it is a number variable"),
+          _("Global variables/Arrays and structures"),
+          "res/actions/var.png")
+      .AddParameter("globalvar", _("Array variable"));
+
+  extension
+      .AddExpression("GlobalVariableChildCount",
+                     _("Number of children"),
+                     _("Number of children in a global array or "
+                       "structure variable"),
+                     _("Global variables/Arrays and structures"),
+                     "res/actions/var.png")
+      .AddParameter("globalvar", _("Array or structure variable"));
 
   extension
       .AddExpression("VariableChildCount",
-                     _("Number of children of a scene variable"),
-                     _("Number of children of a scene variable"),
-                     _("Scene variables"),
+                     _("Number of children"),
+                     _("Number of children in a scene array or "
+                       "structure variable"),
+                     _("Scene variables/Arrays and structures"),
                      "res/actions/var.png")
-      .AddParameter("scenevar", _("Variable"));
+      .AddParameter("scenevar", _("Array or structure variable"));
 
   extension
       .AddExpression("Variable",
-                     _("Value of a scene variable"),
-                     _("Value of a scene variable"),
+                     _("Number variable"),
+                     _("Number value of a scene variable"),
                      _("Scene variables"),
                      "res/actions/var.png")
       .AddParameter("scenevar", _("Variable"));
 
   extension
       .AddStrExpression("VariableString",
-                        _("Text of a scene variable"),
+                        _("Text variable"),
                         _("Text of a scene variable"),
                         _("Scene variables"),
                         "res/actions/var.png")
@@ -446,15 +576,15 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsVariablesExtension(
 
   extension
       .AddExpression("GlobalVariable",
-                     _("Value of a global variable"),
-                     _("Value of a global variable"),
+                     _("Number variable"),
+                     _("Number value of a global variable"),
                      _("Global variables"),
                      "res/actions/var.png")
       .AddParameter("globalvar", _("Name of the global variable"));
 
   extension
       .AddStrExpression("GlobalVariableString",
-                        _("Text of a global variable"),
+                        _("Text variable"),
                         _("Text of a global variable"),
                         _("Global variables"),
                         "res/actions/var.png")

Core/GDCore/Extensions/Metadata/DependencyMetadata.h

@@ -62,7 +62,7 @@ class GD_CORE_API DependencyMetadata {
   };
 
   /**
-   * \brief Sets the type of dependecy (what will be used to install it)
+   * \brief Sets the type of dependency (what will be used to install it)
    *
    * This can either be "npm" or "cordova" for now.
    */

Core/GDCore/Extensions/Metadata/EffectMetadata.cpp

@@ -7,9 +7,6 @@
 
 namespace gd {
 
-EffectMetadata::EffectMetadata(const gd::String& type_)
-    : type(type_), isMarkedAsNotWorkingForObjects(false) {}
-
 EffectMetadata& EffectMetadata::SetIncludeFile(const gd::String& includeFile) {
   includeFiles.clear();
   includeFiles.push_back(includeFile);
@@ -23,9 +20,4 @@ EffectMetadata& EffectMetadata::AddIncludeFile(const gd::String& includeFile) {
   return *this;
 }
 
-EffectMetadata& EffectMetadata::MarkAsNotWorkingForObjects() {
-  isMarkedAsNotWorkingForObjects = true;
-  return *this;
-}
-
 }  // namespace gd

Core/GDCore/Extensions/Metadata/EffectMetadata.h

@@ -3,8 +3,8 @@
  * Copyright 2008-present Florian Rival (Florian.Rival@gmail.com). All rights
  * reserved. This project is released under the MIT License.
  */
-#ifndef EFFECTMETADATA_H
-#define EFFECTMETADATA_H
+#pragma once
+
 #include <functional>
 #include <map>
 #include <memory>
@@ -25,21 +25,25 @@ class GD_CORE_API EffectMetadata {
   /**
    * \brief Construct an effect metadata, with the given type
    */
-  EffectMetadata(const gd::String& type_);
+   EffectMetadata(const gd::String &type_)
+       : type(type_), isMarkedAsNotWorkingForObjects(false),
+         isMarkedAsOnlyWorkingFor2D(false), isMarkedAsOnlyWorkingFor3D(false),
+         isMarkedAsUnique(false) {}
 
-  /**
-   * \brief Default constructor, only used for initializing `badEffectMetadata`.
-   */
-  EffectMetadata() {}
+   /**
+    * \brief Default constructor, only used for initializing
+    * `badEffectMetadata`.
+    */
+   EffectMetadata() {}
 
-  virtual ~EffectMetadata(){};
+   virtual ~EffectMetadata(){};
 
-  /**
-   * \brief Set the name shown to the user.
-   */
-  EffectMetadata& SetFullName(const gd::String& fullname_) {
-    fullname = fullname_;
-    return *this;
+   /**
+    * \brief Set the name shown to the user.
+    */
+   EffectMetadata &SetFullName(const gd::String &fullname_) {
+     fullname = fullname_;
+     return *this;
   };
 
   /**
@@ -69,11 +73,6 @@ class GD_CORE_API EffectMetadata {
    */
   EffectMetadata& AddIncludeFile(const gd::String& includeFile);
 
-  /**
-   * \brief Mark the effect as not working as an object effect.
-   */
-  EffectMetadata& MarkAsNotWorkingForObjects();
-
   /**
    * \brief Return a reference to the properties of this effect.
    */
@@ -117,10 +116,65 @@ class GD_CORE_API EffectMetadata {
     return includeFiles;
   }
 
+  /**
+   * \brief Mark the effect as not working as an object effect.
+   */
+  EffectMetadata& MarkAsNotWorkingForObjects() {
+    isMarkedAsNotWorkingForObjects = true;
+    return *this;
+  }
+
+  /**
+   * \brief Mark the effect as only working for the 2D renderer.
+   */
+  EffectMetadata& MarkAsOnlyWorkingFor2D() {
+    isMarkedAsOnlyWorkingFor2D = true;
+    return *this;
+  }
+
+  /**
+   * \brief Mark the effect as only working for the 3D renderer.
+   */
+  EffectMetadata& MarkAsOnlyWorkingFor3D() {
+    isMarkedAsOnlyWorkingFor3D = true;
+    return *this;
+  }
+
+  /**
+   * \brief Mark the effect as only addable once.
+   */
+  EffectMetadata& MarkAsUnique() {
+    isMarkedAsUnique = true;
+    return *this;
+  }
+
   /**
    * \brief Check if the effect is marked as not working as an object effect.
    */
-  bool IsMarkedAsNotWorkingForObjects() const { return isMarkedAsNotWorkingForObjects; };
+  bool IsMarkedAsNotWorkingForObjects() const {
+    return isMarkedAsNotWorkingForObjects;
+  };
+
+  /**
+   * \brief Check if the effect is marked as only working for the 2D renderer.
+   */
+  bool IsMarkedAsOnlyWorkingFor2D() const {
+    return isMarkedAsOnlyWorkingFor2D;
+  };
+
+  /**
+   * \brief Check if the effect is marked as only working for the 3D renderer.
+   */
+  bool IsMarkedAsOnlyWorkingFor3D() const {
+    return isMarkedAsOnlyWorkingFor3D;
+  };
+
+  /**
+   * \brief Check if the effect can only be added once.
+   */
+  bool IsMarkedAsUnique() const {
+    return isMarkedAsUnique;
+  };
 
  private:
   gd::String extensionNamespace;
@@ -130,8 +184,10 @@ class GD_CORE_API EffectMetadata {
   gd::String description;
   std::vector<gd::String> includeFiles;
   bool isMarkedAsNotWorkingForObjects;
+  bool isMarkedAsOnlyWorkingFor2D;
+  bool isMarkedAsOnlyWorkingFor3D;
+  bool isMarkedAsUnique;
   std::map<gd::String, gd::PropertyDescriptor> properties;
 };
 
 }  // namespace gd
-#endif  // EFFECTMETADATA_H

Core/GDCore/Extensions/Metadata/ExpressionMetadata.cpp

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

Core/GDCore/Extensions/Metadata/ExpressionMetadata.h

@@ -137,7 +137,7 @@ class GD_CORE_API ExpressionMetadata {
    * to fulfill std::map requirements.
    */
   ExpressionMetadata()
-      : returnType("unknown"), shown(false), isPrivate(false){};
+      : returnType("unknown"), shown(false), isPrivate(false), relevantContext("Any"){};
 
   virtual ~ExpressionMetadata(){};
 
@@ -184,6 +184,67 @@ class GD_CORE_API ExpressionMetadata {
     return *this;
   }
 
+  /**
+   * Check if the instruction can be used in layouts or external events.
+   */
+  bool IsRelevantForLayoutEvents() const {
+    return relevantContext == "Any" || relevantContext == "Layout";
+  }
+
+  /**
+   * Check if the instruction can be used in function events.
+   */
+  bool IsRelevantForFunctionEvents() const {
+    return relevantContext == "Any" || relevantContext == "Function";
+  }
+
+  /**
+   * Check if the instruction can be used in asynchronous function events.
+   */
+  bool IsRelevantForAsynchronousFunctionEvents() const {
+    return relevantContext == "Any" || relevantContext == "Function" ||
+           relevantContext == "AsynchronousFunction";
+  }
+
+  /**
+   * Check if the instruction can be used in custom object events.
+   */
+  bool IsRelevantForCustomObjectEvents() const {
+    return relevantContext == "Any" || relevantContext == "Object";
+  }
+
+  /**
+   * Set that the instruction can be used in layouts or external events.
+   */
+  ExpressionMetadata &SetRelevantForLayoutEventsOnly() {
+    relevantContext = "Layout";
+    return *this;
+  }
+
+  /**
+   * Set that the instruction can be used in function events.
+   */
+  ExpressionMetadata &SetRelevantForFunctionEventsOnly() {
+    relevantContext = "Function";
+    return *this;
+  }
+
+  /**
+   * Set that the instruction can be used in asynchronous function events.
+   */
+  ExpressionMetadata &SetRelevantForAsynchronousFunctionEventsOnly() {
+    relevantContext = "AsynchronousFunction";
+    return *this;
+  }
+
+  /**
+   * Set that the instruction can be used in custom object events.
+   */
+  ExpressionMetadata &SetRelevantForCustomObjectEventsOnly() {
+    relevantContext = "Object";
+    return *this;
+  }
+
   /**
    * \see gd::InstructionMetadata::AddParameter
    */
@@ -326,6 +387,7 @@ class GD_CORE_API ExpressionMetadata {
   gd::String extensionNamespace;
   bool isPrivate;
   gd::String requiredBaseObjectCapability;
+  gd::String relevantContext;
 };
 
 }  // namespace gd

Core/GDCore/Extensions/Metadata/InstructionMetadata.cpp

@@ -47,7 +47,8 @@ InstructionMetadata::InstructionMetadata(const gd::String& extensionNamespace_,
       usageComplexity(5),
       isPrivate(false),
       isObjectInstruction(false),
-      isBehaviorInstruction(false) {}
+      isBehaviorInstruction(false),
+      relevantContext("Any") {}
 
 InstructionMetadata& InstructionMetadata::AddParameter(
     const gd::String& type,
@@ -94,13 +95,15 @@ InstructionMetadata& InstructionMetadata::AddCodeOnlyParameter(
 }
 
 InstructionMetadata& InstructionMetadata::UseStandardOperatorParameters(
-    const gd::String& type, const gd::String& typeExtraInfo) {
+    const gd::String& type, const ParameterOptions &options) {
   const gd::String& expressionValueType =
       gd::ValueTypeMetadata::GetPrimitiveValueType(type);
   SetManipulatedType(expressionValueType);
 
   if (type == "boolean") {
-    AddParameter("yesorno", _("New value"));
+    AddParameter(
+        "yesorno",
+        options.description.empty() ? _("New value") : options.description);
     size_t valueParamIndex = parameters.size() - 1;
 
     if (isObjectInstruction || isBehaviorInstruction) {
@@ -122,7 +125,9 @@ InstructionMetadata& InstructionMetadata::UseStandardOperatorParameters(
     }
   } else {
     AddParameter("operator", _("Modification's sign"), expressionValueType);
-    AddParameter(type, _("Value"), typeExtraInfo);
+    AddParameter(type,
+                 options.description.empty() ? _("Value") : options.description,
+                 options.typeExtraInfo);
 
     size_t operatorParamIndex = parameters.size() - 2;
     size_t valueParamIndex = parameters.size() - 1;
@@ -155,7 +160,7 @@ InstructionMetadata& InstructionMetadata::UseStandardOperatorParameters(
 
 InstructionMetadata&
 InstructionMetadata::UseStandardRelationalOperatorParameters(
-    const gd::String& type, const gd::String& typeExtraInfo) {
+    const gd::String& type, const ParameterOptions &options) {
   const gd::String& expressionValueType =
       gd::ValueTypeMetadata::GetPrimitiveValueType(type);
   SetManipulatedType(expressionValueType);
@@ -175,7 +180,9 @@ InstructionMetadata::UseStandardRelationalOperatorParameters(
     }
   } else {
     AddParameter("relationalOperator", _("Sign of the test"), expressionValueType);
-    AddParameter(type, _("Value to compare"), typeExtraInfo);
+    AddParameter(type,
+                 options.description.empty() ? _("Value to compare") : options.description,
+                 options.typeExtraInfo);
     size_t operatorParamIndex = parameters.size() - 2;
     size_t valueParamIndex = parameters.size() - 1;
 

Core/GDCore/Extensions/Metadata/InstructionMetadata.h

@@ -14,6 +14,8 @@
 #include "GDCore/Events/Instruction.h"
 #include "GDCore/String.h"
 #include "ParameterMetadata.h"
+#include "ParameterOptions.h"
+
 namespace gd {
 class Project;
 class Layout;
@@ -99,6 +101,67 @@ class GD_CORE_API InstructionMetadata {
     return *this;
   }
 
+  /**
+   * Check if the instruction can be used in layouts or external events.
+   */
+  bool IsRelevantForLayoutEvents() const {
+    return relevantContext == "Any" || relevantContext == "Layout";
+  }
+
+  /**
+   * Check if the instruction can be used in function events.
+   */
+  bool IsRelevantForFunctionEvents() const {
+    return relevantContext == "Any" || relevantContext == "Function";
+  }
+
+  /**
+   * Check if the instruction can be used in asynchronous function events.
+   */
+  bool IsRelevantForAsynchronousFunctionEvents() const {
+    return relevantContext == "Any" || relevantContext == "Function" ||
+           relevantContext == "AsynchronousFunction";
+  }
+
+  /**
+   * Check if the instruction can be used in custom object events.
+   */
+  bool IsRelevantForCustomObjectEvents() const {
+    return relevantContext == "Any" || relevantContext == "Object";
+  }
+
+  /**
+   * Set that the instruction can be used in layouts or external events.
+   */
+  InstructionMetadata &SetRelevantForLayoutEventsOnly() {
+    relevantContext = "Layout";
+    return *this;
+  }
+
+  /**
+   * Set that the instruction can be used in function events.
+   */
+  InstructionMetadata &SetRelevantForFunctionEventsOnly() {
+    relevantContext = "Function";
+    return *this;
+  }
+
+  /**
+   * Set that the instruction can be used in asynchronous function events.
+   */
+  InstructionMetadata &SetRelevantForAsynchronousFunctionEventsOnly() {
+    relevantContext = "AsynchronousFunction";
+    return *this;
+  }
+
+  /**
+   * Set that the instruction can be used in custom object events.
+   */
+  InstructionMetadata &SetRelevantForCustomObjectEventsOnly() {
+    relevantContext = "Object";
+    return *this;
+  }
+
   /**
    * Check if the instruction is asynchronous - it will be running in the
    * background, executing the instructions following it before the frame after
@@ -109,8 +172,8 @@ class GD_CORE_API InstructionMetadata {
   }
 
   /**
-   * Check if the instruction asynchronicity is optional. If it is, it can either
-   * be used synchronously or asynchronously, with one function for each.
+   * Check if the instruction asynchronicity is optional. If it is, it can
+   * either be used synchronously or asynchronously, with one function for each.
    */
   bool IsOptionallyAsync() const {
     return IsAsync() && !codeExtraInformation.functionCallName.empty();
@@ -223,21 +286,22 @@ class GD_CORE_API InstructionMetadata {
   /**
    * \brief Add the default parameters for an instruction manipulating the
    * specified type ("string", "number") with the default operators.
-   * 
+   *
    * \note The type "string" can be declined in several subtypes.
    * \see ParameterMetadata
    */
-  InstructionMetadata &UseStandardOperatorParameters(const gd::String &type, const gd::String& typeExtraInfo = "");
+  InstructionMetadata &UseStandardOperatorParameters(
+      const gd::String &type, const ParameterOptions &options);
 
   /**
    * \brief Add the default parameters for an instruction comparing the
    * specified type ("string", "number") with the default relational operators.
-   * 
+   *
    * \note The type "string" can be declined in several subtypes.
    * \see ParameterMetadata
    */
   InstructionMetadata &UseStandardRelationalOperatorParameters(
-      const gd::String &type, const gd::String& typeExtraInfo = "");
+      const gd::String &type, const ParameterOptions &options);
 
   /**
    * \brief Mark the instruction as an object instruction. Automatically called
@@ -334,11 +398,12 @@ class GD_CORE_API InstructionMetadata {
     }
 
     /**
-     * Set the name of the function, doing asynchronous work, which will be called in
-     * the generated code. This function should return an asynchronous task
-     * (i.e: `gdjs.AsyncTask` in the JavaScript runtime).
+     * Set the name of the function, doing asynchronous work, which will be
+     * called in the generated code. This function should return an asynchronous
+     * task (i.e: `gdjs.AsyncTask` in the JavaScript runtime).
      *
-     * \param functionName the name of the function doing asynchronous work to call.
+     * \param functionName the name of the function doing asynchronous work to
+     * call.
      */
     ExtraInformation &SetAsyncFunctionName(const gd::String &functionName_) {
       asyncFunctionCallName = functionName_;
@@ -482,12 +547,12 @@ class GD_CORE_API InstructionMetadata {
   }
 
   /**
-   * Set the name of the function, doing asynchronous work, which will be called in
-   * the generated code. This function should return an asynchronous task
+   * Set the name of the function, doing asynchronous work, which will be called
+   * in the generated code. This function should return an asynchronous task
    * (i.e: `gdjs.AsyncTask` in the JavaScript runtime).
    *
-   * \param functionName the name of the function doing asynchronous work to call.
-   * \note Shortcut for `codeExtraInformation.SetAsyncFunctionName`.
+   * \param functionName the name of the function doing asynchronous work to
+   * call. \note Shortcut for `codeExtraInformation.SetAsyncFunctionName`.
    */
   ExtraInformation &SetAsyncFunctionName(const gd::String &functionName) {
     return codeExtraInformation.SetAsyncFunctionName(functionName);
@@ -512,7 +577,7 @@ class GD_CORE_API InstructionMetadata {
   /**
    * \brief Get the files that must be included to use the instruction.
    */
-  const std::vector<gd::String>& GetIncludeFiles() const {
+  const std::vector<gd::String> &GetIncludeFiles() const {
     return codeExtraInformation.GetIncludeFiles();
   };
 
@@ -535,6 +600,7 @@ class GD_CORE_API InstructionMetadata {
   bool isObjectInstruction;
   bool isBehaviorInstruction;
   gd::String requiredBaseObjectCapability;
+  gd::String relevantContext;
 };
 
 }  // namespace gd

Core/GDCore/Extensions/Metadata/MetadataProvider.cpp

@@ -135,11 +135,11 @@ MetadataProvider::GetExtensionAndConditionMetadata(const gd::Platform& platform,
 
     const auto& objects = extension->GetExtensionObjectsTypes();
     for (const gd::String& extObjectType : objects) {
-      const auto& allObjetsConditions =
+      const auto& allObjectsConditions =
           extension->GetAllConditionsForObject(extObjectType);
-      if (allObjetsConditions.find(conditionType) != allObjetsConditions.end())
+      if (allObjectsConditions.find(conditionType) != allObjectsConditions.end())
         return ExtensionAndMetadata<InstructionMetadata>(
-            *extension, allObjetsConditions.find(conditionType)->second);
+            *extension, allObjectsConditions.find(conditionType)->second);
     }
 
     const auto& autos = extension->GetBehaviorsTypes();

Core/GDCore/Extensions/Metadata/MultipleInstructionMetadata.h

@@ -8,6 +8,8 @@
 #include "GDCore/Extensions/Metadata/ExpressionMetadata.h"
 #include "GDCore/Extensions/Metadata/InstructionMetadata.h"
 #include "GDCore/String.h"
+#include "ParameterOptions.h"
+
 namespace gd {}  // namespace gd
 
 namespace gd {
@@ -32,8 +34,7 @@ class GD_CORE_API MultipleInstructionMetadata {
     return MultipleInstructionMetadata(expression, condition, action);
   }
   static MultipleInstructionMetadata WithConditionAndAction(
-      gd::InstructionMetadata &condition,
-      gd::InstructionMetadata &action) {
+      gd::InstructionMetadata &condition, gd::InstructionMetadata &action) {
     return MultipleInstructionMetadata(condition, action);
   }
 
@@ -83,7 +84,8 @@ class GD_CORE_API MultipleInstructionMetadata {
   /**
    * \see gd::InstructionMetadata::SetParameterExtraInfo
    */
-  MultipleInstructionMetadata &SetParameterExtraInfo(const gd::String &defaultValue) {
+  MultipleInstructionMetadata &SetParameterExtraInfo(
+      const gd::String &defaultValue) {
     if (expression) expression->SetParameterExtraInfo(defaultValue);
     if (condition) condition->SetParameterExtraInfo(defaultValue);
     if (action) action->SetParameterExtraInfo(defaultValue);
@@ -126,9 +128,11 @@ class GD_CORE_API MultipleInstructionMetadata {
    * \see gd::InstructionMetadata::UseStandardOperatorParameters
    * \see gd::InstructionMetadata::UseStandardRelationalOperatorParameters
    */
-  MultipleInstructionMetadata &UseStandardParameters(const gd::String &type, const gd::String& typeExtraInfo = "") {
-    if (condition) condition->UseStandardRelationalOperatorParameters(type, typeExtraInfo);
-    if (action) action->UseStandardOperatorParameters(type, typeExtraInfo);
+  MultipleInstructionMetadata &UseStandardParameters(
+      const gd::String &type, const ParameterOptions &options) {
+    if (condition)
+      condition->UseStandardRelationalOperatorParameters(type, options);
+    if (action) action->UseStandardOperatorParameters(type, options);
     return *this;
   }
 
@@ -167,28 +171,23 @@ class GD_CORE_API MultipleInstructionMetadata {
   /**
    * \brief Get the files that must be included to use the instruction.
    */
-  const std::vector<gd::String>& GetIncludeFiles() const {
+  const std::vector<gd::String> &GetIncludeFiles() const {
     if (expression)
       return expression->GetCodeExtraInformation().GetIncludeFiles();
     if (condition)
       return condition->GetCodeExtraInformation().GetIncludeFiles();
-    if (action)
-      return action->GetCodeExtraInformation().GetIncludeFiles();
+    if (action) return action->GetCodeExtraInformation().GetIncludeFiles();
     // It can't actually happen.
     throw std::logic_error("no instruction metadata");
   }
 
   /**
-   * Set that the instruction is private - it can't be used outside of the
-   * object/ behavior that it is attached too.
+   * \see gd::InstructionMetadata::SetPrivate
    */
   MultipleInstructionMetadata &SetPrivate() {
-    if (expression)
-      expression->SetPrivate();
-    if (condition)
-      condition->SetPrivate();
-    if (action)
-      action->SetPrivate();
+    if (expression) expression->SetPrivate();
+    if (condition) condition->SetPrivate();
+    if (action) action->SetPrivate();
     return *this;
   }
 

Core/GDCore/Extensions/Metadata/ObjectMetadata.h

@@ -46,7 +46,7 @@ class GD_CORE_API ObjectMetadata {
                  std::shared_ptr<gd::ObjectConfiguration> blueprintObject_);
   /**
    * \brief Construct an object metadata, without "blueprint" object
-   * 
+   *
    * \note This is used by events based objects.
    */
   ObjectMetadata(const gd::String& extensionNamespace_,
@@ -57,7 +57,7 @@ class GD_CORE_API ObjectMetadata {
 
   /**
    * \brief Construct an object metadata, with a function that will be called
-   * to instanciate a new object.
+   * to instantiate a new object.
    */
   ObjectMetadata(const gd::String& extensionNamespace_,
                  const gd::String& name_,
@@ -224,7 +224,7 @@ class GD_CORE_API ObjectMetadata {
   /**
    * \brief The "capabilities" that are offered by the base object that are
    * *not* supported by this object, and should be hidden in the editor
-   * inferface.
+   * interface.
    */
   const std::set<gd::String>& GetUnsupportedBaseObjectCapabilities() const {
     return unsupportedBaseObjectCapabilities;
@@ -232,7 +232,7 @@ class GD_CORE_API ObjectMetadata {
 
   /**
    * \brief Add a "capability" that is offered by the base object that is *not*
-   * supported by this object, and should be hidden in the editor inferface.
+   * supported by this object, and should be hidden in the editor interface.
    */
   ObjectMetadata& AddUnsupportedBaseObjectCapability(
       const gd::String& capability) {
@@ -242,7 +242,7 @@ class GD_CORE_API ObjectMetadata {
 
   /**
    * \brief Check if a "capability" that is offered by the base object is *not*
-   * supported by this object, and should be hidden in the editor inferface.
+   * supported by this object, and should be hidden in the editor interface.
    */
   bool IsUnsupportedBaseObjectCapability(const gd::String& capability) const {
     return unsupportedBaseObjectCapabilities.find(capability) != unsupportedBaseObjectCapabilities.end();
@@ -295,6 +295,22 @@ class GD_CORE_API ObjectMetadata {
    */
   std::map<gd::String, gd::ExpressionMetadata>& GetAllStrExpressions() { return strExpressionsInfos; };
 
+  /**
+   * \brief Set the object to be hidden in the IDE.
+   *
+   * Used mainly when an object is deprecated.
+   */
+  ObjectMetadata &SetHidden() {
+    hidden = true;
+    return *this;
+  }
+
+
+  /**
+   * \brief Return true if the instruction must be hidden in the IDE.
+   */
+  bool IsHidden() const { return hidden; }
+
   std::map<gd::String, gd::InstructionMetadata> conditionsInfos;
   std::map<gd::String, gd::InstructionMetadata> actionsInfos;
   std::map<gd::String, gd::ExpressionMetadata> expressionsInfos;
@@ -314,6 +330,7 @@ class GD_CORE_API ObjectMetadata {
   gd::String iconFilename;
   gd::String categoryFullName;
   std::set<gd::String> unsupportedBaseObjectCapabilities;
+  bool hidden = false;
 
   std::shared_ptr<gd::ObjectConfiguration>
       blueprintObject;  ///< The "blueprint" object to be copied when a new

Core/GDCore/Extensions/Metadata/ParameterMetadata.h

@@ -209,10 +209,10 @@ class GD_CORE_API ParameterMetadata {
    * \brief Return the expression type from the parameter type.
    * Declinations of "number" and "string" types (like "forceMultiplier" or
    * "sceneName") are replaced by "number" and "string".
-   * \deprecated Use gd::ValueTypeMetadata instead.
+   * \deprecated Use gd::ValueTypeMetadata or gd::GetExpressionPrimitiveValueType instead.
    */
   static const gd::String &GetExpressionValueType(const gd::String &parameterType) {
-    return gd::ValueTypeMetadata::GetPrimitiveValueType(parameterType);
+    return gd::ValueTypeMetadata::GetExpressionPrimitiveValueType(parameterType);
   }
 
   /** \name Serialization

Core/GDCore/Extensions/Metadata/ParameterMetadataTools.cpp

@@ -11,6 +11,8 @@
 #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 {
 void ParameterMetadataTools::ParametersToObjectsContainer(
@@ -101,6 +103,56 @@ void ParameterMetadataTools::IterateOverParametersWithIndex(
   }
 }
 
+void ParameterMetadataTools::IterateOverParametersWithIndex(
+    const gd::Platform &platform,
+    const gd::ObjectsContainer &globalObjectsContainer,
+    const gd::ObjectsContainer &objectsContainer, FunctionCallNode &node,
+    std::function<void(const gd::ParameterMetadata &parameterMetadata,
+                       std::unique_ptr<gd::ExpressionNode> &parameterNode,
+                       size_t parameterIndex, const gd::String &lastObjectName)>
+        fn) {
+  gd::String lastObjectName = node.objectName;
+
+  const bool isObjectFunction = !node.objectName.empty();
+  const gd::ExpressionMetadata &metadata =
+      isObjectFunction ? MetadataProvider::GetObjectAnyExpressionMetadata(
+                             platform,
+                             GetTypeOfObject(globalObjectsContainer,
+                                             objectsContainer, node.objectName),
+                             node.functionName)
+                       : MetadataProvider::GetAnyExpressionMetadata(
+                             platform, node.functionName);
+
+  if (gd::MetadataProvider::IsBadExpressionMetadata(metadata)) {
+    return;
+  }
+
+  size_t parameterIndex = 0;
+  for (size_t metadataIndex = (isObjectFunction ? 1 : 0);
+       metadataIndex < metadata.parameters.size() &&
+       parameterIndex < node.parameters.size();
+       ++metadataIndex) {
+    auto &parameterMetadata = metadata.parameters[metadataIndex];
+    if (parameterMetadata.IsCodeOnly()) {
+      continue;
+    }
+    auto &parameterNode = node.parameters[parameterIndex];
+    ++parameterIndex;
+
+    fn(parameterMetadata, parameterNode, parameterIndex, lastObjectName);
+
+    // 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.
+    if (gd::ParameterMetadata::IsObject(parameterMetadata.GetType()))
+      // Object can't be expressions so it should always be the object name.
+      lastObjectName =
+          gd::ExpressionParser2NodePrinter::PrintNode(*parameterNode);
+  }
+}
+
 size_t ParameterMetadataTools::GetObjectParameterIndexFor(
     const std::vector<gd::ParameterMetadata>& parametersMetadata,
     size_t parameterIndex) {

Core/GDCore/Extensions/Metadata/ParameterMetadataTools.h

@@ -7,12 +7,16 @@
 #ifndef ParameterMetadataTools_H
 #define ParameterMetadataTools_H
 #include <vector>
+#include <memory>
 #include "GDCore/String.h"
 namespace gd {
+class Platform;
 class Project;
 class ObjectsContainer;
 class ParameterMetadata;
 class Expression;
+struct FunctionCallNode;
+struct ExpressionNode;
 }  // namespace gd
 
 namespace gd {
@@ -48,6 +52,21 @@ class GD_CORE_API ParameterMetadataTools {
                          size_t parameterIndex,
                          const gd::String& lastObjectName)> fn);
 
+  /**
+   * Iterate over the parameters of a FunctionCallNode.
+   * Callback function is called with the parameter metadata, its value
+   * and if applicable the name of the object it's linked to.
+   */
+  static void IterateOverParametersWithIndex(
+      const gd::Platform &platform,
+      const gd::ObjectsContainer &globalObjectsContainer,
+      const gd::ObjectsContainer &objectsContainer, FunctionCallNode &node,
+      std::function<void(const gd::ParameterMetadata &parameterMetadata,
+                         std::unique_ptr<gd::ExpressionNode> &parameterNode,
+                         size_t parameterIndex,
+                         const gd::String &lastObjectName)>
+          fn);
+
   /**
    * Given a parameter, return, if applicable, the index of the object parameter
    * it's linked to.

Core/GDCore/Extensions/Metadata/ParameterOptions.h

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

Core/GDCore/Extensions/Metadata/ValueTypeMetadata.cpp

@@ -35,15 +35,59 @@ void ValueTypeMetadata::UnserializeFrom(const SerializerElement& element) {
 
 const gd::String ValueTypeMetadata::numberType = "number";
 const gd::String ValueTypeMetadata::stringType = "string";
+const gd::String ValueTypeMetadata::variableType = "variable";
+const gd::String ValueTypeMetadata::booleanType = "boolean";
 
-const gd::String &ValueTypeMetadata::GetPrimitiveValueType(const gd::String &parameterType) {
-  if (parameterType == "number" || gd::ValueTypeMetadata::IsTypeExpression("number", parameterType)) {
+const gd::String &ValueTypeMetadata::GetExpressionPrimitiveValueType(
+    const gd::String &parameterType) {
+  if (parameterType == "number" ||
+      gd::ValueTypeMetadata::IsTypeExpression("number", parameterType)) {
     return ValueTypeMetadata::numberType;
   }
-  if (parameterType == "string" || gd::ValueTypeMetadata::IsTypeExpression("string", parameterType)) {
+  if (parameterType == "string" ||
+      gd::ValueTypeMetadata::IsTypeExpression("string", parameterType)) {
     return ValueTypeMetadata::stringType;
   }
   return parameterType;
 }
 
+const gd::String &
+ValueTypeMetadata::GetPrimitiveValueType(const gd::String &parameterType) {
+  if (parameterType == "variable" ||
+      gd::ValueTypeMetadata::IsTypeExpression("variable", parameterType)) {
+    return ValueTypeMetadata::variableType;
+  }
+  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") {
+    return ValueTypeMetadata::stringType;
+  }
+  return GetExpressionPrimitiveValueType(parameterType);
+}
+
+const gd::String ValueTypeMetadata::numberValueType = "number";
+const gd::String ValueTypeMetadata::booleanValueType = "boolean";
+const gd::String ValueTypeMetadata::colorValueType = "color";
+const gd::String ValueTypeMetadata::choiceValueType = "stringWithSelector";
+const gd::String ValueTypeMetadata::stringValueType = "string";
+
+const gd::String &ValueTypeMetadata::ConvertPropertyTypeToValueType(
+    const gd::String &propertyType) {
+  if (propertyType == "Number") {
+    return numberValueType;
+  } else if (propertyType == "Boolean") {
+    return booleanValueType;
+  } else if (propertyType == "Color") {
+    return colorValueType;
+  } else if (propertyType == "Choice") {
+    return choiceValueType;
+  }
+  // For "String" or default
+  return stringValueType;
+};
+
 }  // namespace gd

Core/GDCore/Extensions/Metadata/ValueTypeMetadata.h

@@ -163,7 +163,6 @@ class GD_CORE_API ValueTypeMetadata {
     } else if (type == "string") {
       return parameterType == "string" || parameterType == "layer" ||
              parameterType == "color" || parameterType == "file" ||
-             parameterType == "joyaxis" ||
              parameterType == "stringWithSelector" ||
              parameterType == "sceneName" ||
              parameterType == "layerEffectName" ||
@@ -179,6 +178,16 @@ class GD_CORE_API ValueTypeMetadata {
     } else if (type == "variable") {
       return parameterType == "objectvar" || parameterType == "globalvar" ||
              parameterType == "scenevar";
+    } else if (type == "resource") {
+      return parameterType == "fontResource" ||
+             parameterType == "soundfile" ||
+             parameterType == "musicfile" ||
+             parameterType == "bitmapFontResource" ||
+             parameterType == "imageResource" ||
+             parameterType == "jsonResource" ||
+             parameterType == "tilemapResource" ||
+             parameterType == "tilesetResource" ||
+             parameterType == "model3DResource";
     }
     return false;
   }
@@ -187,10 +196,29 @@ class GD_CORE_API ValueTypeMetadata {
    * \brief Return the expression type from the parameter type.
    * Declinations of "number" and "string" types (like "forceMultiplier" or
    * "sceneName") are replaced by "number" and "string".
+   * 
+   * \note It only maps string and number types.
+   */
+  static const gd::String &GetExpressionPrimitiveValueType(const gd::String &parameterType);
+
+  /**
+   * \brief Return the primitive type from the parameter type.
+   * Declinations of "number" and "string" types (like "forceMultiplier" or
+   * "sceneName") are replaced by "number" and "string".
+   * 
+   * \note It also maps variable and boolean types.
    */
   static const gd::String &GetPrimitiveValueType(const gd::String &parameterType);
   static const gd::String numberType;
   static const gd::String stringType;
+  static const gd::String variableType;
+  static const gd::String booleanType;
+
+  /**
+   * \brief Return the ValueTypeMetadata name for a property type.
+   * \see gd::PropertyDescriptor
+   */
+  static const gd::String &ConvertPropertyTypeToValueType(const gd::String &propertyType);
 
   /** \name Serialization
    */
@@ -212,6 +240,12 @@ class GD_CORE_API ValueTypeMetadata {
   bool optional;                        ///< True if the parameter is optional
   gd::String defaultValue;     ///< Used as a default value in editor or if an
                                ///< optional parameter is empty.
+
+  static const gd::String numberValueType;
+  static const gd::String booleanValueType;
+  static const gd::String colorValueType;
+  static const gd::String choiceValueType;
+  static const gd::String stringValueType;
 };
 
 }  // namespace gd

Core/GDCore/Extensions/PlatformExtension.cpp

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

Core/GDCore/Extensions/PlatformExtension.h

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

Core/GDCore/IDE/DependenciesAnalyzer.h

@@ -42,7 +42,7 @@ class GD_CORE_API DependenciesAnalyzer {
    *
    * You can also call then
    * DependenciesAnalyzer::ExternalEventsCanBeCompiledForAScene to check if the
-   * external events can be compiled separatly and called by a scene. \see
+   * external events can be compiled separately and called by a scene. \see
    * DependenciesAnalyzer::ExternalEventsCanBeCompiledForAScene
    */
   DependenciesAnalyzer(const gd::Project& project_,

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

@@ -3,7 +3,6 @@
  * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
  * reserved. This project is released under the MIT License.
  */
-#if defined(GD_IDE_ONLY)
 #ifndef SCENECANVASSETTINGS_H
 #define SCENECANVASSETTINGS_H
 #include "GDCore/String.h"
@@ -43,4 +42,3 @@ private:
 }  // namespace gd
 
 #endif  // SCENECANVASSETTINGS_H
-#endif

Core/GDCore/IDE/EventBasedBehaviorBrowser.cpp

@@ -0,0 +1,49 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#include "EventBasedBehaviorBrowser.h"
+
+#include "GDCore/IDE/Events/ArbitraryEventsWorker.h"
+#include "GDCore/IDE/Project/ArbitraryEventBasedBehaviorsWorker.h"
+#include "GDCore/IDE/Project/ArbitraryEventsFunctionsWorker.h"
+#include "GDCore/IDE/Project/ArbitraryObjectsWorker.h"
+#include "GDCore/IDE/Project/ArbitraryBehaviorSharedDataWorker.h"
+#include "GDCore/IDE/ProjectBrowserHelper.h"
+#include "GDCore/Project/EventsBasedBehavior.h"
+#include "GDCore/Project/Project.h"
+#include "GDCore/String.h"
+
+namespace gd {
+
+void EventBasedBehaviorBrowser::ExposeEvents(
+    gd::Project &project, gd::ArbitraryEventsWorker &worker) const {
+  gd::ProjectBrowserHelper::ExposeEventsBasedBehaviorEvents(
+      project, eventsBasedBehavior, worker);
+}
+
+void EventBasedBehaviorBrowser::ExposeEvents(
+    gd::Project &project, gd::ArbitraryEventsWorkerWithContext &worker) const {
+  gd::ProjectBrowserHelper::ExposeEventsBasedBehaviorEvents(
+      project, eventsBasedBehavior, worker);
+}
+
+void EventBasedBehaviorBrowser::ExposeObjects(
+    gd::Project &project, gd::ArbitraryObjectsWorker &worker) const {}
+
+void EventBasedBehaviorBrowser::ExposeFunctions(
+    gd::Project &project, gd::ArbitraryEventsFunctionsWorker &worker) const {
+  worker.Launch(eventsBasedBehavior.GetEventsFunctions());
+}
+
+void EventBasedBehaviorBrowser::ExposeEventBasedBehaviors(
+    gd::Project &project,
+    gd::ArbitraryEventBasedBehaviorsWorker &worker) const {
+  worker.Launch(eventsBasedBehavior);
+}
+
+void EventBasedBehaviorBrowser::ExposeBehaviorSharedDatas(
+    gd::Project &project, gd::ArbitraryBehaviorSharedDataWorker &worker) const {}
+
+} // namespace gd

Core/GDCore/IDE/EventBasedBehaviorBrowser.h

@@ -0,0 +1,86 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#pragma once
+
+#include "GDCore/IDE/ProjectBrowser.h"
+
+namespace gd {
+class Project;
+class String;
+class EventsFunctionsExtension;
+class EventsFunction;
+class EventsBasedBehavior;
+class EventsBasedObject;
+class ArbitraryEventsWorker;
+class ArbitraryEventsWorkerWithContext;
+class ArbitraryEventsFunctionsWorker;
+class ArbitraryObjectsWorker;
+class ArbitraryEventBasedBehaviorsWorker;
+class ArbitraryBehaviorSharedDataWorker;
+} // namespace gd
+
+namespace gd {
+
+/**
+ * \brief Expose event-based behavior contents to workers.
+ */
+class GD_CORE_API EventBasedBehaviorBrowser : public ProjectBrowser {
+public:
+  EventBasedBehaviorBrowser(gd::EventsBasedBehavior &eventsBasedBehavior_)
+      : eventsBasedBehavior(eventsBasedBehavior_) {}
+
+  /**
+   * \brief Call the specified worker on all events of the event-based
+   * behavior.
+   *
+   * This should be the preferred way to traverse all the events of an event-based behavior.
+   */
+  void ExposeEvents(gd::Project &project,
+                    gd::ArbitraryEventsWorker &worker) const override;
+
+  /**
+   * \brief Call the specified worker on all events of the event-based
+   * behavior.
+   *
+   * This should be the preferred way to traverse all the events of an event-based behavior.
+   */
+  void
+  ExposeEvents(gd::Project &project,
+               gd::ArbitraryEventsWorkerWithContext &worker) const override;
+
+  /**
+   * \brief Call the specified worker on all functions of the event-based behavior
+   *
+   * This should be the preferred way to traverse all the function signatures
+   * of an event-based behavior.
+   */
+  void ExposeFunctions(gd::Project &project,
+                       gd::ArbitraryEventsFunctionsWorker &worker) const override;
+
+  /**
+   * \brief Do nothing.
+   */
+  void ExposeObjects(gd::Project &project,
+                     gd::ArbitraryObjectsWorker &worker) const override;
+
+  /**
+   * \brief Call the specified worker on the event-based behavior.
+   */
+  void ExposeEventBasedBehaviors(
+      gd::Project &project,
+      gd::ArbitraryEventBasedBehaviorsWorker &worker) const override;
+
+  /**
+   * \brief Do nothing.
+   */
+  void ExposeBehaviorSharedDatas(gd::Project &project,
+                         gd::ArbitraryBehaviorSharedDataWorker &worker) const override;
+
+private:
+  gd::EventsBasedBehavior &eventsBasedBehavior;
+};
+
+} // namespace gd

Core/GDCore/IDE/Events/ArbitraryEventsWorker.cpp

@@ -23,7 +23,7 @@ void ArbitraryEventsWorker::VisitEventList(gd::EventsList& events) {
   DoVisitEventList(events);
 
   for (std::size_t i = 0; i < events.size();) {
-    if (VisitEvent(events[i]))
+    if (events[i].AcceptVisitor(*this))
       events.RemoveEvent(i);
     else {
       if (events[i].CanHaveSubEvents())
@@ -50,6 +50,10 @@ bool ArbitraryEventsWorker::VisitEvent(gd::BaseEvent& event) {
   return false;
 }
 
+bool ArbitraryEventsWorker::VisitLinkEvent(gd::LinkEvent& linkEvent) {
+  return DoVisitLinkEvent(linkEvent);
+}
+
 void ArbitraryEventsWorker::VisitInstructionList(
     gd::InstructionsList& instructions, bool areConditions) {
   DoVisitInstructionList(instructions, areConditions);
@@ -80,7 +84,10 @@ void ReadOnlyArbitraryEventsWorker::VisitEventList(const gd::EventsList& events)
   DoVisitEventList(events);
 
   for (std::size_t i = 0; i < events.size(); ++i) {
-    VisitEvent(events[i]);
+    if (shouldStopIteration) {
+      break;
+    }
+    events[i].AcceptVisitor(*this);
 
     if (events[i].CanHaveSubEvents()) {
       VisitEventList(events[i].GetSubEvents());
@@ -94,20 +101,33 @@ void ReadOnlyArbitraryEventsWorker::VisitEvent(const gd::BaseEvent& event) {
   const vector<const gd::InstructionsList*> conditionsVectors =
       event.GetAllConditionsVectors();
   for (std::size_t j = 0; j < conditionsVectors.size(); ++j) {
+    if (shouldStopIteration) {
+      break;
+    }
     VisitInstructionList(*conditionsVectors[j], true);
   }
 
   const vector<const gd::InstructionsList*> actionsVectors = event.GetAllActionsVectors();
   for (std::size_t j = 0; j < actionsVectors.size(); ++j) {
+    if (shouldStopIteration) {
+      break;
+    }
     VisitInstructionList(*actionsVectors[j], false);
   }
 }
 
+void ReadOnlyArbitraryEventsWorker::VisitLinkEvent(const gd::LinkEvent& linkEvent) {
+  DoVisitLinkEvent(linkEvent);
+}
+
 void ReadOnlyArbitraryEventsWorker::VisitInstructionList(
     const gd::InstructionsList& instructions, bool areConditions) {
   DoVisitInstructionList(instructions, areConditions);
 
   for (std::size_t i = 0; i < instructions.size(); ++i) {
+    if (shouldStopIteration) {
+      break;
+    }
     VisitInstruction(instructions[i], areConditions);
     if (!instructions[i].GetSubInstructions().empty()) {
       VisitInstructionList(instructions[i].GetSubInstructions(),
@@ -121,6 +141,10 @@ void ReadOnlyArbitraryEventsWorker::VisitInstruction(const gd::Instruction& inst
   DoVisitInstruction(instruction, isCondition);
 }
 
+void ReadOnlyArbitraryEventsWorker::StopAnyEventIteration() {
+  shouldStopIteration = true;
+}
+
 ReadOnlyArbitraryEventsWorkerWithContext::~ReadOnlyArbitraryEventsWorkerWithContext() {}
 
 }  // namespace gd

Core/GDCore/IDE/Events/ArbitraryEventsWorker.h

@@ -9,10 +9,12 @@
 #include <memory>
 #include <vector>
 #include "GDCore/Events/InstructionsList.h"
+#include "GDCore/Events/EventVisitor.h"
 #include "GDCore/String.h"
 namespace gd {
 class Instruction;
 class BaseEvent;
+class LinkEvent;
 class EventsList;
 class ObjectsContainer;
 }  // namespace gd
@@ -28,7 +30,7 @@ namespace gd {
  *
  * \ingroup IDE
  */
-class GD_CORE_API ArbitraryEventsWorker {
+class GD_CORE_API ArbitraryEventsWorker : private EventVisitor {
  public:
   ArbitraryEventsWorker(){};
   virtual ~ArbitraryEventsWorker();
@@ -40,7 +42,8 @@ class GD_CORE_API ArbitraryEventsWorker {
 
  private:
   void VisitEventList(gd::EventsList& events);
-  bool VisitEvent(gd::BaseEvent& event);
+  bool VisitEvent(gd::BaseEvent& event) override;
+  bool VisitLinkEvent(gd::LinkEvent& linkEvent) override;
   void VisitInstructionList(gd::InstructionsList& instructions,
                             bool areConditions);
   bool VisitInstruction(gd::Instruction& instruction, bool isCondition);
@@ -52,11 +55,21 @@ class GD_CORE_API ArbitraryEventsWorker {
 
   /**
    * Called to do some work on an event
-   * \return true if the instruction must be deleted from the events list, false
+   * \return true if the event must be deleted from the events list, false
    * otherwise (default).
    */
   virtual bool DoVisitEvent(gd::BaseEvent& event) { return false; };
 
+  /**
+   * Called to do some work on a link event.
+   * 
+   * Note that DoVisitEvent is also called with this event.
+   * 
+   * \return true if the event must be deleted from the events list, false
+   * otherwise (default).
+   */
+  virtual bool DoVisitLinkEvent(gd::LinkEvent& event) { return false; };
+
   /**
    * Called to do some work on an instruction list
    */
@@ -129,9 +142,9 @@ class GD_CORE_API ArbitraryEventsWorkerWithContext
  *
  * \ingroup IDE
  */
-class GD_CORE_API ReadOnlyArbitraryEventsWorker {
+class GD_CORE_API ReadOnlyArbitraryEventsWorker : private ReadOnlyEventVisitor {
  public:
-  ReadOnlyArbitraryEventsWorker(){};
+  ReadOnlyArbitraryEventsWorker() : shouldStopIteration(false) {};
   virtual ~ReadOnlyArbitraryEventsWorker();
 
   /**
@@ -139,9 +152,13 @@ class GD_CORE_API ReadOnlyArbitraryEventsWorker {
    */
   void Launch(const gd::EventsList& events) { VisitEventList(events); };
 
+protected:
+  void StopAnyEventIteration() override;
+
  private:
   void VisitEventList(const gd::EventsList& events);
-  void VisitEvent(const gd::BaseEvent& event);
+  void VisitEvent(const gd::BaseEvent& event) override;
+  void VisitLinkEvent(const gd::LinkEvent& linkEvent) override;
   void VisitInstructionList(const gd::InstructionsList& instructions,
                             bool areConditions);
   void VisitInstruction(const gd::Instruction& instruction, bool isCondition);
@@ -156,6 +173,13 @@ class GD_CORE_API ReadOnlyArbitraryEventsWorker {
    */
   virtual void DoVisitEvent(const gd::BaseEvent& event) {};
 
+  /**
+   * Called to do some work on a link event.
+   * 
+   * Note that DoVisitEvent is also called with this event.
+   */
+  virtual void DoVisitLinkEvent(const gd::LinkEvent& linkEvent) {};
+
   /**
    * Called to do some work on an instruction list
    */
@@ -167,6 +191,8 @@ class GD_CORE_API ReadOnlyArbitraryEventsWorker {
    */
   virtual void DoVisitInstruction(const gd::Instruction& instruction,
                                   bool isCondition) {};
+
+  bool shouldStopIteration;
 };
 
 /**

Core/GDCore/IDE/Events/BehaviorTypeRenamer.h

@@ -8,13 +8,10 @@
 #define GDCORE_BEHAVIORTYPERENAMER_H
 #include <set>
 
-#include "GDCore/Events/Parsers/ExpressionParser2NodeWorker.h"
-#include "GDCore/IDE/Events/ArbitraryEventsWorker.h"
 #include "GDCore/IDE/Project/ArbitraryObjectsWorker.h"
 #include "GDCore/String.h"
 
 namespace gd {
-class Project;
 class Object;
 class Behavior;
 }  // namespace gd
@@ -23,17 +20,15 @@ namespace gd {
 
 class GD_CORE_API BehaviorTypeRenamer : public ArbitraryObjectsWorker {
  public:
-  BehaviorTypeRenamer(const gd::Project& project_,
-                          const gd::String& oldType_,
-                          const gd::String& newType_)
-      : project(project_), oldType(oldType_), newType(newType_){};
+  BehaviorTypeRenamer(const gd::String& oldType_,
+                      const gd::String& newType_)
+      : oldType(oldType_), newType(newType_){};
   virtual ~BehaviorTypeRenamer();
 
  private:
   void DoVisitObject(gd::Object& object) override;
   void DoVisitBehavior(gd::Behavior& behavior) override;
 
-  const gd::Project& project;
   gd::String oldType;
   gd::String newType;
 };

Core/GDCore/IDE/Events/CustomObjectTypeRenamer.h

@@ -8,13 +8,10 @@
 #define GDCORE_CUSTOMOBJECTTYPERENAMER_H
 #include <set>
 
-#include "GDCore/Events/Parsers/ExpressionParser2NodeWorker.h"
-#include "GDCore/IDE/Events/ArbitraryEventsWorker.h"
 #include "GDCore/IDE/Project/ArbitraryObjectsWorker.h"
 #include "GDCore/String.h"
 
 namespace gd {
-class Project;
 class Object;
 class Behavior;
 }  // namespace gd
@@ -23,17 +20,15 @@ namespace gd {
 
 class GD_CORE_API CustomObjectTypeRenamer : public ArbitraryObjectsWorker {
  public:
-  CustomObjectTypeRenamer(const gd::Project& project_,
-                          const gd::String& oldType_,
+  CustomObjectTypeRenamer(const gd::String& oldType_,
                           const gd::String& newType_)
-      : project(project_), oldType(oldType_), newType(newType_){};
+      : oldType(oldType_), newType(newType_){};
   virtual ~CustomObjectTypeRenamer();
 
  private:
   void DoVisitObject(gd::Object& object) override;
   void DoVisitBehavior(gd::Behavior& behavior) override;
 
-  const gd::Project& project;
   gd::String oldType;
   gd::String newType;
 };

Core/GDCore/IDE/Events/EventsFunctionSelfCallChecker.cpp

@@ -0,0 +1,175 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-present Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#include "EventsFunctionSelfCallChecker.h"
+
+#include "GDCore/Events/Expression.h"
+#include "GDCore/Events/Parsers/ExpressionParser2Node.h"
+#include "GDCore/Events/Parsers/ExpressionParser2NodeWorker.h"
+#include "GDCore/Extensions/Metadata/ExpressionMetadata.h"
+#include "GDCore/Extensions/Metadata/MetadataProvider.h"
+#include "GDCore/Extensions/Metadata/ParameterMetadataTools.h"
+#include "GDCore/Extensions/PlatformExtension.h"
+#include "GDCore/IDE/Events/ArbitraryEventsWorker.h"
+#include "GDCore/Project/EventsBasedBehavior.h"
+#include "GDCore/Project/EventsBasedObject.h"
+#include "GDCore/Project/EventsFunction.h"
+#include "GDCore/Project/EventsFunctionsExtension.h"
+#include "GDCore/Project/Object.h"
+#include "GDCore/Project/Project.h"
+#include "GDCore/String.h"
+#include "GDCore/Tools/Log.h"
+
+namespace gd {
+
+/**
+ * \brief Check the type of the first condition or action.
+ */
+class GD_CORE_API FirstInstructionTypeChecker
+    : public ReadOnlyArbitraryEventsWorker {
+public:
+  FirstInstructionTypeChecker(const gd::String &eventFunctionType_,
+                              const bool isEventFunctionCondition_)
+      : eventFunctionType(eventFunctionType_),
+        isEventFunctionCondition(isEventFunctionCondition_),
+        isOnlyCallingItself(false){};
+  virtual ~FirstInstructionTypeChecker(){};
+
+  void DoVisitInstruction(const gd::Instruction &instruction,
+                          bool isCondition) override {
+    if (isCondition == isEventFunctionCondition) {
+      isOnlyCallingItself = instruction.GetType() == eventFunctionType;
+      StopAnyEventIteration();
+    }
+  };
+
+  bool isOnlyCallingItself;
+
+private:
+  gd::String eventFunctionType;
+  bool isEventFunctionCondition;
+};
+
+/**
+ * \brief Check the type of the first condition or action.
+ */
+class GD_CORE_API FirstActionExpressionTypeChecker
+    : public ReadOnlyArbitraryEventsWorker,
+      ExpressionParser2NodeWorker {
+public:
+  FirstActionExpressionTypeChecker(const gd::Platform &platform_,
+                                   const gd::String &eventFunctionType_)
+      : platform(platform_), eventFunctionType(eventFunctionType_),
+        isOnlyCallingItself(false){};
+  virtual ~FirstActionExpressionTypeChecker(){};
+
+  void DoVisitInstruction(const gd::Instruction &instruction,
+                          bool isCondition) override {
+    // Typically, it should be a "return" action.
+    if (!isCondition) {
+      gd::String lastObjectParameter = "";
+      const gd::InstructionMetadata &instrInfos =
+          MetadataProvider::GetActionMetadata(platform, instruction.GetType());
+      for (std::size_t pNb = 0; pNb < instrInfos.parameters.size(); ++pNb) {
+
+        if (ParameterMetadata::IsExpression(
+                "number", instrInfos.parameters[pNb].GetType()) ||
+            ParameterMetadata::IsExpression(
+                "string", instrInfos.parameters[pNb].GetType())) {
+          auto node = instruction.GetParameter(pNb).GetRootNode();
+          node->Visit(*this);
+        }
+      }
+      StopAnyEventIteration();
+    }
+  }
+
+  // Only check expressions that directly calls a function.
+  void OnVisitFunctionCallNode(FunctionCallNode &node) override {
+    isOnlyCallingItself |= node.functionName == eventFunctionType;
+  }
+
+  // Handle extra parenthesis.
+  void OnVisitSubExpressionNode(SubExpressionNode &node) override {
+    node.expression->Visit(*this);
+  }
+  void OnVisitOperatorNode(OperatorNode &node) override {}
+  // Handle sign that could have been forgotten
+  void OnVisitUnaryOperatorNode(UnaryOperatorNode &node) override {
+    node.factor->Visit(*this);
+  }
+  void OnVisitNumberNode(NumberNode &node) override {}
+  void OnVisitTextNode(TextNode &node) override {}
+  void OnVisitVariableNode(VariableNode &node) override {}
+  void OnVisitVariableAccessorNode(VariableAccessorNode &node) override {}
+  void OnVisitVariableBracketAccessorNode(
+      VariableBracketAccessorNode &node) override {}
+  void OnVisitIdentifierNode(IdentifierNode &node) override {}
+  void OnVisitObjectFunctionNameNode(ObjectFunctionNameNode &node) override {}
+  void OnVisitEmptyNode(EmptyNode &node) override {}
+
+  bool isOnlyCallingItself;
+
+private:
+  const gd::Platform &platform;
+  gd::String eventFunctionType;
+};
+
+bool EventsFunctionSelfCallChecker::IsOnlyCallingItself(
+    const gd::Project &project, const gd::String &functionFullType,
+    const gd::EventsFunction &eventsFunction) {
+  bool isOnlyCallingItself = false;
+
+  if (eventsFunction.IsExpression()) {
+    FirstActionExpressionTypeChecker eventWorker(project.GetCurrentPlatform(),
+                                                 functionFullType);
+    eventWorker.Launch(eventsFunction.GetEvents());
+    isOnlyCallingItself = eventWorker.isOnlyCallingItself;
+  } else {
+    FirstInstructionTypeChecker eventWorker(functionFullType,
+                                            !eventsFunction.IsAction());
+    eventWorker.Launch(eventsFunction.GetEvents());
+    isOnlyCallingItself = eventWorker.isOnlyCallingItself;
+  }
+  return isOnlyCallingItself;
+}
+
+bool EventsFunctionSelfCallChecker::IsFreeFunctionOnlyCallingItself(
+    const gd::Project &project,
+    const gd::EventsFunctionsExtension &eventsFunctionsExtension,
+    const gd::EventsFunction &eventsFunction) {
+  return IsOnlyCallingItself(
+      project,
+      PlatformExtension::GetEventsFunctionFullType(
+          eventsFunctionsExtension.GetName(), eventsFunction.GetName()),
+      eventsFunction);
+}
+
+bool EventsFunctionSelfCallChecker::IsBehaviorFunctionOnlyCallingItself(
+    const gd::Project &project,
+    const gd::EventsFunctionsExtension &eventsFunctionsExtension,
+    const gd::EventsBasedBehavior &eventsBasedBehavior,
+    const gd::EventsFunction &eventsFunction) {
+  return IsOnlyCallingItself(
+      project,
+      PlatformExtension::GetBehaviorEventsFunctionFullType(
+          eventsFunctionsExtension.GetName(), eventsBasedBehavior.GetName(),
+          eventsFunction.GetName()),
+      eventsFunction);
+}
+bool EventsFunctionSelfCallChecker::IsObjectFunctionOnlyCallingItself(
+    const gd::Project &project,
+    const gd::EventsFunctionsExtension &eventsFunctionsExtension,
+    const gd::EventsBasedObject &eventsBasedObject,
+    const gd::EventsFunction &eventsFunction) {
+  return IsOnlyCallingItself(project,
+                             PlatformExtension::GetObjectEventsFunctionFullType(
+                                 eventsFunctionsExtension.GetName(),
+                                 eventsBasedObject.GetName(),
+                                 eventsFunction.GetName()),
+                             eventsFunction);
+}
+
+} // namespace gd

Core/GDCore/IDE/Events/EventsFunctionSelfCallChecker.h

@@ -0,0 +1,64 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-present Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#pragma once
+
+#include "GDCore/String.h"
+#include <vector>
+namespace gd {
+class Project;
+class EventsFunctionsExtension;
+class EventsFunctionsContainer;
+class EventsFunction;
+class EventsBasedBehavior;
+class EventsBasedObject;
+} // namespace gd
+
+namespace gd {
+/**
+ * \brief Check if functions are only calling themselves.
+ *
+ * It allows to detect mistakes when implementing functions for compatibility
+ * after a function renaming.
+ * Infinite loops can happens when the legacy function call itself instead of
+ * the new function.
+ * 
+ * \note Only the first instruction or the expressions of the first action is
+ * checked.
+ */
+class GD_CORE_API EventsFunctionSelfCallChecker {
+public:
+  /**
+   * \brief Check if a free function is only calling itself.
+   */
+  static bool IsFreeFunctionOnlyCallingItself(
+      const gd::Project &project,
+      const gd::EventsFunctionsExtension &eventsFunctionsExtension,
+      const gd::EventsFunction &eventsFunction);
+
+  /**
+   * \brief Check if a behavior function is only calling itself.
+   */
+  static bool IsBehaviorFunctionOnlyCallingItself(
+      const gd::Project &project,
+      const gd::EventsFunctionsExtension &eventsFunctionsExtension,
+      const gd::EventsBasedBehavior &eventsBasedBehavior,
+      const gd::EventsFunction &eventsFunction);
+
+  /**
+   * \brief Check if an object function is only calling itself.
+   */
+  static bool IsObjectFunctionOnlyCallingItself(
+      const gd::Project &project,
+      const gd::EventsFunctionsExtension &eventsFunctionsExtension,
+      const gd::EventsBasedObject &eventsBasedObject,
+      const gd::EventsFunction &eventsFunction);
+
+private:
+  static bool IsOnlyCallingItself(const gd::Project &project,
+                                  const gd::String &functionFullType,
+                                  const gd::EventsFunction &eventsFunction);
+};
+} // namespace gd

Core/GDCore/IDE/Events/EventsIdentifiersFinder.cpp

@@ -202,7 +202,7 @@ std::set<gd::String> EventsIdentifiersFinder::FindAllIdentifierExpressions(
   std::set<gd::String> results;
 
   const bool isObjectIdentifier = identifierType.find("object") == 0;
-  // The object from the context is only relevent for object identifiers.
+  // The object from the context is only relevant for object identifiers.
   auto& actualObjectName = isObjectIdentifier ? contextObjectName : "";
 
   FindArgumentsInEventsAndDependencies(

Core/GDCore/IDE/Events/EventsRefactorer.cpp

@@ -642,7 +642,7 @@ std::vector<EventsSearchResult> EventsRefactorer::ReplaceStringInEvents(
   return modifiedEvents;
 }
 
-gd::String ReplaceAllOccurencesCaseUnsensitive(gd::String context,
+gd::String ReplaceAllOccurrencesCaseInsensitive(gd::String context,
                                                gd::String from,
                                                const gd::String& to) {
   size_t lookHere = 0;
@@ -673,7 +673,7 @@ bool EventsRefactorer::ReplaceStringInActions(gd::ObjectsContainer& project,
           matchCase
               ? actions[aId].GetParameter(pNb).GetPlainString().FindAndReplace(
                     toReplace, newString, true)
-              : ReplaceAllOccurencesCaseUnsensitive(
+              : ReplaceAllOccurrencesCaseInsensitive(
                     actions[aId].GetParameter(pNb).GetPlainString(),
                     toReplace,
                     newString);
@@ -713,7 +713,7 @@ bool EventsRefactorer::ReplaceStringInConditions(
                           .GetParameter(pNb)
                           .GetPlainString()
                           .FindAndReplace(toReplace, newString, true)
-                    : ReplaceAllOccurencesCaseUnsensitive(
+                    : ReplaceAllOccurrencesCaseInsensitive(
                           conditions[cId].GetParameter(pNb).GetPlainString(),
                           toReplace,
                           newString);
@@ -749,7 +749,7 @@ bool EventsRefactorer::ReplaceStringInEventSearchableStrings(
   for (std::size_t sNb = 0; sNb < stringEvent.size(); ++sNb) {
     gd::String newStringEvent =
         matchCase ? stringEvent[sNb].FindAndReplace(toReplace, newString, true)
-                  : ReplaceAllOccurencesCaseUnsensitive(
+                  : ReplaceAllOccurrencesCaseInsensitive(
                         stringEvent[sNb], toReplace, newString);
     newEventStrings.push_back(newStringEvent);
   }
@@ -773,15 +773,18 @@ vector<EventsSearchResult> EventsRefactorer::SearchInEvents(
   const gd::String& ignored_characters =
       EventsRefactorer::searchIgnoredCharacters;
 
-  search.replace_if(
-      search.begin(),
-      search.end(),
-      [ignored_characters](const char& c) {
-        return ignored_characters.find(c) != gd::String::npos;
-      },
-      "");
-  search = search.LeftTrim().RightTrim();
-  search.RemoveConsecutiveOccurrences(search.begin(), search.end(), ' ');
+  if (inEventSentences) {
+    // Remove ignored characters only when searching in event sentences.
+    search.replace_if(
+        search.begin(),
+        search.end(),
+        [ignored_characters](const char& c) {
+          return ignored_characters.find(c) != gd::String::npos;
+        },
+        "");
+    search = search.LeftTrim().RightTrim();
+    search.RemoveConsecutiveOccurrences(search.begin(), search.end(), ' ');
+  }
 
   for (std::size_t i = 0; i < events.size(); ++i) {
     bool eventAddedInResults = false;

Core/GDCore/IDE/Events/EventsRemover.h

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

Core/GDCore/IDE/Events/ExpressionValidator.cpp

@@ -77,24 +77,42 @@ ExpressionValidator::Type ExpressionValidator::ValidateFunction(const gd::Functi
       MetadataProvider::GetBehaviorAnyExpressionMetadata(
             platform, behaviorType, function.functionName);
 
-  if (!function.objectName.empty()) {
-    // If the function needs a capability on the object that may not be covered
-    // by all objects, check it now.
-    if (!metadata.GetRequiredBaseObjectCapability().empty()) {
-      const gd::ObjectMetadata &objectMetadata =
-          MetadataProvider::GetObjectMetadata(platform, objectType);
+  Type returnType = StringToType(metadata.GetReturnType());
 
-      if (objectMetadata.IsUnsupportedBaseObjectCapability(
-              metadata.GetRequiredBaseObjectCapability())) {
-        RaiseTypeError(
-            _("This expression exists, but it can't be used on this object."),
-            function.objectNameLocation);
-        return StringToType(metadata.GetReturnType());
-      }
-    }
+  if (!function.objectName.empty() &&
+      !globalObjectsContainer.HasObjectNamed(function.objectName) &&
+      !globalObjectsContainer.GetObjectGroups().Has(function.objectName) &&
+      !objectsContainer.HasObjectNamed(function.objectName) &&
+      !objectsContainer.GetObjectGroups().Has(function.objectName)) {
+    RaiseTypeError(_("This object doesn't exist."),
+                   function.objectNameLocation, /*isFatal=*/false);
+    return returnType;
   }
 
-  Type returnType = StringToType(metadata.GetReturnType());
+  if (!function.behaviorName.empty() &&
+      !gd::HasBehaviorInObjectOrGroup(globalObjectsContainer, objectsContainer,
+                                     function.objectName,
+                                     function.behaviorName)) {
+    RaiseTypeError(_("This behavior is not attached to this object."),
+                   function.behaviorNameLocation, /*isFatal=*/false);
+    return returnType;
+  }
+
+  if (!function.objectName.empty() &&
+    // If the function needs a capability on the object that may not be covered
+    // by all objects, check it now.
+  !metadata.GetRequiredBaseObjectCapability().empty()) {
+    const gd::ObjectMetadata &objectMetadata =
+        MetadataProvider::GetObjectMetadata(platform, objectType);
+
+    if (objectMetadata.IsUnsupportedBaseObjectCapability(
+            metadata.GetRequiredBaseObjectCapability())) {
+      RaiseTypeError(
+          _("This expression exists, but it can't be used on this object."),
+          function.objectNameLocation);
+      return returnType;
+    }
+  }
 
   if (gd::MetadataProvider::IsBadExpressionMetadata(metadata)) {
     RaiseError(
@@ -115,8 +133,8 @@ ExpressionValidator::Type ExpressionValidator::ValidateFunction(const gd::Functi
             "number to a string."),
           function.location);
       return returnType;
-    }
-    else if (parentType != Type::Number && parentType != Type::NumberOrString) {
+    } else if (parentType != Type::Number &&
+               parentType != Type::NumberOrString) {
       RaiseTypeError(_("You tried to use an expression that returns a "
                               "number, but another type is expected:") +
                               " " + TypeToString(parentType),
@@ -131,8 +149,8 @@ ExpressionValidator::Type ExpressionValidator::ValidateFunction(const gd::Functi
             "string to a number."),
           function.location);
       return returnType;
-    }
-    else if (parentType != Type::String && parentType != Type::NumberOrString) {
+    } else if (parentType != Type::String &&
+               parentType != Type::NumberOrString) {
       RaiseTypeError(_("You tried to use an expression that returns a "
                               "string, but another type is expected:") +
                               " " + TypeToString(parentType),
@@ -172,8 +190,7 @@ ExpressionValidator::Type ExpressionValidator::ValidateFunction(const gd::Functi
           _("You have not entered enough parameters for the expression.") + " " +
               expectedCountMessage,
           function.location);
-    }
-    else {
+    } else {
       RaiseError(
           "extra_parameter",
           _("This parameter was not expected by this expression. Remove it "
@@ -217,8 +234,7 @@ ExpressionValidator::Type ExpressionValidator::ValidateFunction(const gd::Functi
                     "parameter."),
                 parameter->location);
         }
-      }
-      else if (gd::ParameterMetadata::IsObject(expectedParameterType)) {
+      } else if (gd::ParameterMetadata::IsObject(expectedParameterType)) {
         if (dynamic_cast<IdentifierNode *>(parameter.get()) == nullptr) {
           RaiseError(
                   "malformed_object_parameter",

Core/GDCore/IDE/Events/ExpressionValidator.h

@@ -45,7 +45,7 @@ class GD_CORE_API ExpressionValidator : public ExpressionParser2NodeWorker {
 
   /**
    * \brief Helper function to check if a given node does not contain
-   * any error.
+   * any error including non-fatal ones.
    */
   static bool HasNoErrors(const gd::Platform &platform,
                       const gd::ObjectsContainer &globalObjectsContainer,
@@ -54,16 +54,25 @@ class GD_CORE_API ExpressionValidator : public ExpressionParser2NodeWorker {
                       gd::ExpressionNode& node) {
     gd::ExpressionValidator validator(platform, globalObjectsContainer, objectsContainer, rootType);
     node.Visit(validator);
-    return validator.GetErrors().empty();
+    return validator.GetAllErrors().empty();
   }
 
+  /**
+   * \brief Get only the fatal errors
+   *
+   * Expressions with fatal error can't be generated.
+   */
+  const std::vector<ExpressionParserDiagnostic*>& GetFatalErrors() {
+    return fatalErrors;
+  };
+
   /**
    * \brief Get all the errors
    *
    * No errors means that the expression is valid.
    */
-  const std::vector<ExpressionParserDiagnostic*>& GetErrors() {
-    return errors;
+  const std::vector<ExpressionParserDiagnostic*>& GetAllErrors() {
+    return allErrors;
   };
 
  protected:
@@ -150,12 +159,29 @@ class GD_CORE_API ExpressionValidator : public ExpressionParser2NodeWorker {
   void OnVisitNumberNode(NumberNode& node) override {
     ReportAnyError(node);
     childType = Type::Number;
-    CheckType(parentType, childType, node.location);
+    if (parentType == Type::String) {
+      RaiseTypeError(
+          _("You entered a number, but a text was expected (in quotes)."),
+          node.location);
+    } else if (parentType != Type::Number &&
+               parentType != Type::NumberOrString) {
+      RaiseTypeError(_("You entered a number, but this type was expected:") +
+                         " " + TypeToString(parentType),
+                     node.location);
+    }
   }
   void OnVisitTextNode(TextNode& node) override {
     ReportAnyError(node);
     childType = Type::String;
-    CheckType(parentType, childType, node.location);
+    if (parentType == Type::Number) {
+      RaiseTypeError(_("You entered a text, but a number was expected."),
+                     node.location);
+    } else if (parentType != Type::String &&
+               parentType != Type::NumberOrString) {
+      RaiseTypeError(_("You entered a text, but this type was expected:") +
+                         " " + TypeToString(parentType),
+                     node.location);
+    }
   }
   void OnVisitVariableNode(VariableNode& node) override {
     ReportAnyError(node);
@@ -163,7 +189,21 @@ class GD_CORE_API ExpressionValidator : public ExpressionParser2NodeWorker {
       node.child->Visit(*this);
     }
     childType = Type::Variable;
-    CheckType(parentType, childType, node.location);
+    if (parentType == Type::String) {
+      RaiseTypeError(_("Variables must be surrounded by VariableString()."),
+                     node.location);
+    } else if (parentType == Type::Number) {
+      RaiseTypeError(_("Variables must be surrounded by Variable()."),
+                     node.location);
+    } else if (parentType == Type::NumberOrString) {
+      RaiseTypeError(
+          _("Variables must be surrounded by Variable() or VariableString()."),
+          node.location);
+    } else if (parentType != Type::Variable) {
+      RaiseTypeError(_("You entered a variable, but this type was expected:") +
+                         " " + TypeToString(parentType),
+                     node.location);
+    }
   }
   void OnVisitVariableAccessorNode(VariableAccessorNode& node) override {
     ReportAnyError(node);
@@ -239,20 +279,26 @@ class GD_CORE_API ExpressionValidator : public ExpressionParser2NodeWorker {
   enum Type {Unknown = 0, Number, String, NumberOrString, Variable, Object, Empty};
   Type ValidateFunction(const gd::FunctionCallNode& function);
 
-  void ReportAnyError(const ExpressionNode& node) {
+  void ReportAnyError(const ExpressionNode& node, bool isFatal = true) {
     if (node.diagnostic && node.diagnostic->IsError()) {
       // Syntax errors are holden by the AST nodes.
       // It's fine to give pointers on them as the AST live longer than errors
       // handling.
-      errors.push_back(node.diagnostic.get());
+      allErrors.push_back(node.diagnostic.get());
+      if (isFatal) {
+        fatalErrors.push_back(node.diagnostic.get());
+      }
     }
   }
 
   void RaiseError(const gd::String &type, 
-      const gd::String &message, const ExpressionParserLocation &location) {
+      const gd::String &message, const ExpressionParserLocation &location, bool isFatal = true) {
     auto diagnostic = gd::make_unique<ExpressionParserError>(
         type, message, location);
-    errors.push_back(diagnostic.get());
+    allErrors.push_back(diagnostic.get());
+    if (isFatal) {
+      fatalErrors.push_back(diagnostic.get());
+    }
     // Errors found by the validator are not holden by the AST nodes.
     // They must be owned by the validator to keep living while errors are
     // handled by the caller.
@@ -260,8 +306,8 @@ class GD_CORE_API ExpressionValidator : public ExpressionParser2NodeWorker {
   }
 
   void RaiseTypeError(
-      const gd::String &message, const ExpressionParserLocation &location) {
-    RaiseError("type_error", message, location);
+      const gd::String &message, const ExpressionParserLocation &location, bool isFatal = true) {
+    RaiseError("type_error", message, location, isFatal);
   }
 
   void RaiseOperatorError(
@@ -269,32 +315,6 @@ class GD_CORE_API ExpressionValidator : public ExpressionParser2NodeWorker {
     RaiseError("invalid_operator", message, location);
   }
 
-  void CheckType(Type expect, Type actual, const ExpressionParserLocation &location) {
-    if (actual == Type::String) {
-      if (expect == Type::Number) {
-        RaiseTypeError(_("You entered a text, but a number was expected."),
-                           location);
-      }
-      else if (expect != Type::String && expect != Type::NumberOrString) {
-        RaiseTypeError(
-            _("You entered a text, but this type was expected:") + " " + TypeToString(expect),
-            location);
-      }
-    }
-    else if (actual == Type::Number) {
-      if (expect == Type::String) {
-        RaiseTypeError(
-            _("You entered a number, but a text was expected (in quotes)."),
-            location);
-      }
-      else if (expect != Type::Number && expect != Type::NumberOrString) {
-        RaiseTypeError(
-            _("You entered a number, but this type was expected:") + " " + TypeToString(expect),
-            location);
-      }
-    }
-  }
-
   static Type StringToType(const gd::String &type);
   static const gd::String &TypeToString(Type type);
   static const gd::String unknownTypeString;
@@ -306,7 +326,8 @@ class GD_CORE_API ExpressionValidator : public ExpressionParser2NodeWorker {
   static const gd::String identifierTypeString;
   static const gd::String emptyTypeString;
 
-  std::vector<ExpressionParserDiagnostic*> errors;
+  std::vector<ExpressionParserDiagnostic*> fatalErrors;
+  std::vector<ExpressionParserDiagnostic*> allErrors;
   std::vector<std::unique_ptr<ExpressionParserDiagnostic>> supplementalErrors;
   Type childType;
   Type parentType;

Core/GDCore/IDE/Events/InstructionsCountEvaluator.cpp

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

Core/GDCore/IDE/Events/InstructionsCountEvaluator.h

@@ -0,0 +1,50 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+
+#ifndef GDCORE_INSTRUCTIONS_COUNT_EVALUATOR_H
+#define GDCORE_INSTRUCTIONS_COUNT_EVALUATOR_H
+#include <set>
+
+#include "GDCore/Events/Parsers/ExpressionParser2NodeWorker.h"
+#include "GDCore/IDE/Events/ArbitraryEventsWorker.h"
+#include "GDCore/IDE/Project/ArbitraryObjectsWorker.h"
+#include "GDCore/String.h"
+
+namespace gd {
+class Project;
+class Object;
+class Behavior;
+} // namespace gd
+
+namespace gd {
+
+/**
+ * @brief Count the number of instructions in a project excluding extensions.
+ *
+ * This is used by the examples repository to evaluate examples size.
+ *
+ */
+class GD_CORE_API InstructionsCountEvaluator : public ArbitraryEventsWorker {
+public:
+  /**
+   * Return the number of instructions in the project excluding extensions.
+   */
+  static const int ScanProject(gd::Project &project);
+
+private:
+  InstructionsCountEvaluator(gd::Project &project_)
+      : project(project_), instructionCount(0){};
+  gd::Project &project;
+  int instructionCount;
+
+  // Instructions Visitor
+  bool DoVisitInstruction(gd::Instruction &instruction,
+                          bool isCondition) override;
+};
+
+}; // namespace gd
+
+#endif

Core/GDCore/IDE/Events/LinkEventTargetRenamer.cpp

@@ -0,0 +1,33 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#include "LinkEventTargetRenamer.h"
+
+#include <map>
+#include <memory>
+#include <vector>
+
+#include "GDCore/Events/Builtin/LinkEvent.h"
+#include "GDCore/Events/Event.h"
+#include "GDCore/Events/EventsList.h"
+#include "GDCore/Project/Layout.h"
+#include "GDCore/Project/Project.h"
+#include "GDCore/String.h"
+#include "GDCore/Tools/Log.h"
+
+namespace gd {
+
+bool LinkEventTargetRenamer::DoVisitLinkEvent(gd::LinkEvent &linkEvent) {
+
+  if (linkEvent.GetTarget() == oldName) {
+    linkEvent.SetTarget(newName);
+  }
+
+  return false;
+}
+
+LinkEventTargetRenamer::~LinkEventTargetRenamer() {}
+
+} // namespace gd

Core/GDCore/IDE/Events/LinkEventTargetRenamer.h

@@ -0,0 +1,44 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#pragma once
+
+#include "GDCore/IDE/Events/ArbitraryEventsWorker.h"
+#include "GDCore/String.h"
+#include <map>
+#include <memory>
+#include <vector>
+
+namespace gd {
+class BaseEvent;
+class LinkEvent;
+class Platform;
+class EventsList;
+} // namespace gd
+
+namespace gd {
+
+/**
+ * \brief Replace in link events the name of external events.
+ *
+ * \ingroup IDE
+ */
+class GD_CORE_API LinkEventTargetRenamer
+    : public ArbitraryEventsWorkerWithContext {
+public:
+  LinkEventTargetRenamer(const gd::Platform &platform_,
+                         const gd::String &oldName_, const gd::String &newName_)
+      : platform(platform_), oldName(oldName_), newName(newName_){};
+  virtual ~LinkEventTargetRenamer();
+
+private:
+  bool DoVisitLinkEvent(gd::LinkEvent &linkEvent) override;
+
+  const gd::Platform &platform;
+  gd::String oldName;
+  gd::String newName;
+};
+
+} // namespace gd

Core/GDCore/IDE/Events/ProjectElementRenamer.cpp

@@ -0,0 +1,198 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#include "ProjectElementRenamer.h"
+
+#include <map>
+#include <memory>
+#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/ParameterMetadataTools.h"
+#include "GDCore/IDE/Events/ExpressionValidator.h"
+#include "GDCore/Project/Layout.h"
+#include "GDCore/Project/Project.h"
+#include "GDCore/String.h"
+#include "GDCore/Tools/Log.h"
+
+namespace gd {
+
+/**
+ * \brief Go through the nodes and find every function call parameter of a
+ * given type.
+ *
+ * \see gd::ExpressionParser2
+ */
+class GD_CORE_API ExpressionIdentifierStringFinder
+    : public ExpressionParser2NodeWorker {
+public:
+  ExpressionIdentifierStringFinder(
+      const gd::Platform &platform_,
+      const gd::ObjectsContainer &globalObjectsContainer_,
+      const gd::ObjectsContainer &objectsContainer_,
+      const gd::String &expressionPlainString_,
+      const gd::String &parameterType_, const gd::String &objectName_,
+      const gd::String &layerName_, const gd::String &oldName_)
+      : platform(platform_), globalObjectsContainer(globalObjectsContainer_),
+        objectsContainer(objectsContainer_),
+        expressionPlainString(expressionPlainString_),
+        parameterType(parameterType_), objectName(objectName_),
+        layerName(layerName_), oldName(oldName_){};
+  virtual ~ExpressionIdentifierStringFinder(){};
+
+  const std::vector<gd::ExpressionParserLocation> GetOccurrences() const {
+    return occurrences;
+  }
+
+protected:
+  void OnVisitSubExpressionNode(SubExpressionNode &node) override {
+    node.expression->Visit(*this);
+  }
+  void OnVisitOperatorNode(OperatorNode &node) override {
+    node.leftHandSide->Visit(*this);
+    node.rightHandSide->Visit(*this);
+  }
+  void OnVisitUnaryOperatorNode(UnaryOperatorNode &node) override {
+    node.factor->Visit(*this);
+  }
+  void OnVisitNumberNode(NumberNode &node) override {}
+  void OnVisitTextNode(TextNode &node) override {}
+  void OnVisitVariableNode(VariableNode &node) override {
+    if (node.child)
+      node.child->Visit(*this);
+  }
+  void OnVisitVariableAccessorNode(VariableAccessorNode &node) override {
+    if (node.child)
+      node.child->Visit(*this);
+  }
+  void OnVisitVariableBracketAccessorNode(
+      VariableBracketAccessorNode &node) override {
+    node.expression->Visit(*this);
+    if (node.child)
+      node.child->Visit(*this);
+  }
+  void OnVisitIdentifierNode(IdentifierNode &node) override {}
+  void OnVisitObjectFunctionNameNode(ObjectFunctionNameNode &node) override {}
+  void OnVisitFunctionCallNode(FunctionCallNode &node) override {
+    gd::String lastLayerName;
+    gd::ParameterMetadataTools::IterateOverParametersWithIndex(
+        platform, globalObjectsContainer, objectsContainer, node,
+        [&](const gd::ParameterMetadata &parameterMetadata,
+            std::unique_ptr<gd::ExpressionNode> &parameterNode,
+            size_t parameterIndex, const gd::String &lastObjectName) {
+          if (parameterMetadata.GetType() == "layer") {
+            // Remove quotes, it won't match if it's not a literal anyway.
+            lastLayerName = expressionPlainString.substr(
+                parameterNode->location.GetStartPosition() + 1,
+                parameterNode->location.GetEndPosition() -
+                    parameterNode->location.GetStartPosition() - 2);
+          }
+          if (parameterMetadata.GetType() == parameterType) {
+            auto parameterExpressionPlainString = expressionPlainString.substr(
+                parameterNode->location.GetStartPosition(),
+                parameterNode->location.GetEndPosition() -
+                    parameterNode->location.GetStartPosition());
+            if ((objectName.empty() || lastObjectName == objectName) &&
+                (layerName.empty() || lastLayerName == layerName) &&
+                parameterExpressionPlainString == "\"" + oldName + "\"") {
+              occurrences.push_back(parameterNode->location);
+            } else {
+              parameterNode->Visit(*this);
+            }
+          }
+        });
+  }
+  void OnVisitEmptyNode(EmptyNode &node) override {}
+
+private:
+  const gd::Platform &platform;
+  const gd::ObjectsContainer &globalObjectsContainer;
+  const gd::ObjectsContainer &objectsContainer;
+  /// It's used to extract parameter content.
+  const gd::String &expressionPlainString;
+  const gd::String &oldName;
+  /// The type of parameter to check.
+  const gd::String parameterType;
+  /// If not empty, parameters will be taken into account only if related to
+  /// this object.
+  const gd::String objectName;
+  /// If not empty, parameters will be taken into account only if related to
+  /// this layer.
+  const gd::String layerName;
+  std::vector<gd::ExpressionParserLocation> occurrences;
+};
+
+bool ProjectElementRenamer::DoVisitInstruction(gd::Instruction &instruction,
+                                               bool isCondition) {
+  const auto &metadata = isCondition
+                             ? gd::MetadataProvider::GetConditionMetadata(
+                                   platform, instruction.GetType())
+                             : gd::MetadataProvider::GetActionMetadata(
+                                   platform, instruction.GetType());
+
+  gd::String lastLayerName;
+  gd::ParameterMetadataTools::IterateOverParametersWithIndex(
+      instruction.GetParameters(), metadata.GetParameters(),
+      [&](const gd::ParameterMetadata &parameterMetadata,
+          const gd::Expression &parameterValue, size_t parameterIndex,
+          const gd::String &lastObjectName) {
+        if (parameterMetadata.GetType() == "layer") {
+          // Remove quotes, it won't match if it's not a literal anyway.
+          lastLayerName = parameterValue.GetPlainString().substr(
+              1, parameterValue.GetPlainString().length() - 2);
+        }
+
+        if (parameterMetadata.GetType() == parameterType &&
+            (objectName.empty() || lastObjectName == objectName) &&
+            (layerName.empty() || lastLayerName == layerName)) {
+          if (parameterValue.GetPlainString() == "\"" + oldName + "\"") {
+            instruction.SetParameter(parameterIndex,
+                                     gd::Expression("\"" + newName + "\""));
+          }
+        }
+        auto node = parameterValue.GetRootNode();
+        if (node) {
+          ExpressionIdentifierStringFinder finder(
+              platform, GetGlobalObjectsContainer(), GetObjectsContainer(),
+              parameterValue.GetPlainString(), parameterType, objectName,
+              layerName, oldName);
+          node->Visit(finder);
+
+          if (finder.GetOccurrences().size() > 0) {
+
+            gd::String newNameWithQuotes = "\"" + newName + "\"";
+            gd::String oldParameterValue = parameterValue.GetPlainString();
+            gd::String newParameterValue;
+            auto previousEndPosition = 0;
+            for (auto &&occurrenceLocation : finder.GetOccurrences()) {
+              newParameterValue += oldParameterValue.substr(
+                  previousEndPosition,
+                  occurrenceLocation.GetStartPosition() - previousEndPosition);
+              newParameterValue += newNameWithQuotes;
+
+              previousEndPosition = occurrenceLocation.GetEndPosition();
+            }
+            if (previousEndPosition < oldParameterValue.size()) {
+              newParameterValue += oldParameterValue.substr(
+                  previousEndPosition,
+                  oldParameterValue.size() - previousEndPosition);
+            }
+
+            instruction.SetParameter(parameterIndex,
+                                     gd::Expression(newParameterValue));
+          }
+        }
+      });
+
+  return false;
+}
+
+ProjectElementRenamer::~ProjectElementRenamer() {}
+
+} // namespace gd

Core/GDCore/IDE/Events/ProjectElementRenamer.h

@@ -0,0 +1,63 @@
+/*
+ * 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/Events/ArbitraryEventsWorker.h"
+#include "GDCore/String.h"
+#include <map>
+#include <memory>
+#include <vector>
+
+namespace gd {
+class BaseEvent;
+class Platform;
+class EventsList;
+} // namespace gd
+
+namespace gd {
+
+/**
+ * \brief Replace in expressions and in parameters of actions or conditions
+ * occurrences of project element name. For instance, it can be layouts or
+ * object effects.
+ *
+ * \ingroup IDE
+ */
+class GD_CORE_API ProjectElementRenamer
+    : public ArbitraryEventsWorkerWithContext {
+public:
+  ProjectElementRenamer(const gd::Platform &platform_,
+                        const gd::String &parameterType_,
+                        const gd::String &oldName_, const gd::String &newName_)
+      : platform(platform_), parameterType(parameterType_), oldName(oldName_),
+        newName(newName_){};
+  virtual ~ProjectElementRenamer();
+
+  void SetObjectConstraint(const gd::String &objectName_) {
+    objectName = objectName_;
+  }
+
+  void SetLayerConstraint(const gd::String &layerName_) {
+    layerName = layerName_;
+  }
+
+private:
+  bool DoVisitInstruction(gd::Instruction &instruction,
+                          bool isCondition) override;
+
+  const gd::Platform &platform;
+  const gd::String parameterType;
+  /// If not empty, parameters will be taken into account only if related to
+  /// this object.
+  gd::String objectName;
+  /// If not empty, parameters will be taken into account only if related to
+  /// this layer.
+  gd::String layerName;
+  const gd::String oldName;
+  const gd::String newName;
+};
+
+} // namespace gd

Core/GDCore/IDE/Events/UsedExtensionsFinder.cpp

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

Core/GDCore/IDE/Events/UsedExtensionsFinder.h

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

Core/GDCore/IDE/ExtensionsLoader.cpp

@@ -144,7 +144,7 @@ void ExtensionsLoader::LoadExtension(const gd::String &fullpath,
                                      bool forgiving) {
   if (platform.GetExtensionCreateFunctionName().empty()) {
     cout << "Unable to load extension " << fullpath << ":" << endl;
-    cout << "The plaftorm does not support extensions creation." << endl;
+    cout << "The platform does not support extensions creation." << endl;
     return;
   }
 

Core/GDCore/IDE/ExtensionsLoader.h

@@ -35,7 +35,7 @@ class GD_CORE_API ExtensionsLoader {
    * \param platform The platform the extensions belongs to.
    * \param forgiving If set to true, files will try to be opened, but a failure
    * when searching for the platform creation function symbol won't be logged as
-   * an error. (All other errors are still reparted as usual).
+   * an error. (All other errors are still reported as usual).
    *
    * \note Extensions files must have extensions *.xgd(w|l|m)(e),
    * w for Windows, l for Linux, m for Mac, e for Edittime extensions.
@@ -51,7 +51,7 @@ class GD_CORE_API ExtensionsLoader {
    * \param platform The platform the extension belongs to.
    * \param forgiving If set to true, files will try to be opened, but a failure
    * when searching for the platform creation function symbol won't be logged as
-   * an error. (All other errors are still reparted as usual).
+   * an error. (All other errors are still reported as usual).
    */
   static void LoadExtension(const gd::String& fullpath,
                             gd::Platform& platform,

Core/GDCore/IDE/Project/ArbitraryBehaviorSharedDataWorker.cpp

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

Core/GDCore/IDE/Project/ArbitraryBehaviorSharedDataWorker.h

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

Core/GDCore/IDE/Project/ArbitraryEventBasedBehaviorsWorker.cpp

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

Core/GDCore/IDE/Project/ArbitraryEventBasedBehaviorsWorker.h

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

Core/GDCore/IDE/Project/ArbitraryEventsFunctionsWorker.cpp

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

Core/GDCore/IDE/Project/ArbitraryEventsFunctionsWorker.h

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

Core/GDCore/IDE/Project/ArbitraryObjectsWorker.h

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

Core/GDCore/IDE/Project/ArbitraryResourceWorker.cpp

@@ -35,6 +35,21 @@ void ArbitraryResourceWorker::ExposeJson(gd::String& jsonName){
     // do.
 };
 
+void ArbitraryResourceWorker::ExposeTilemap(gd::String& tilemapName){
+    // Nothing to do by default - each child class can define here the action to
+    // do.
+};
+
+void ArbitraryResourceWorker::ExposeTileset(gd::String& tilesetName){
+    // Nothing to do by default - each child class can define here the action to
+    // do.
+};
+
+void ArbitraryResourceWorker::ExposeModel3D(gd::String& resourceName){
+    // Nothing to do by default - each child class can define here the action to
+    // do.
+};
+
 void ArbitraryResourceWorker::ExposeVideo(gd::String& videoName){
     // Nothing to do by default - each child class can define here the action to
     // do.
@@ -56,7 +71,7 @@ void ArbitraryResourceWorker::ExposeAudio(gd::String& audioName) {
     }
   }
 
-  // For compatibility with older projects (where events were refering to files
+  // For compatibility with older projects (where events were referring to files
   // directly), we consider that this resource name is a filename, and so expose
   // it as a file.
   ExposeFile(audioName);
@@ -73,7 +88,7 @@ void ArbitraryResourceWorker::ExposeFont(gd::String& fontName) {
     }
   }
 
-  // For compatibility with older projects (where events were refering to files
+  // For compatibility with older projects (where events were referring to files
   // directly), we consider that this resource name is a filename, and so expose
   // it as a file.
   ExposeFile(fontName);
@@ -92,6 +107,69 @@ void ArbitraryResourceWorker::ExposeResources(
   }
 }
 
+void ArbitraryResourceWorker::ExposeEmbeddeds(gd::String& resourceName) {
+  if (resourcesManagers.empty()) return;
+  gd::ResourcesManager* resourcesManager = resourcesManagers[0];
+
+  gd::Resource& resource = resourcesManager->GetResource(resourceName);
+
+  if (!resource.GetMetadata().empty()) {
+    gd::SerializerElement serializerElement =
+        gd::Serializer::FromJSON(resource.GetMetadata());
+
+    if (serializerElement.HasChild("embeddedResourcesMapping")) {
+      bool anyEmbeddedResourceNameWasRenamed = false;
+      gd::SerializerElement& embeddedResourcesMappingElement =
+          serializerElement.GetChild("embeddedResourcesMapping");
+
+      for (const auto& child :
+           embeddedResourcesMappingElement.GetAllChildren()) {
+        const gd::String& targetResourceName =
+            child.second->GetValue().GetString();
+
+        if (resourcesManager->HasResource(targetResourceName)) {
+          std::cout << targetResourceName << std::endl;
+          gd::Resource& targetResource =
+              resourcesManager->GetResource(targetResourceName);
+          const gd::String& targetResourceKind = targetResource.GetKind();
+
+          gd::String potentiallyUpdatedTargetResourceName = targetResourceName;
+
+          if (targetResourceKind == "audio") {
+            ExposeAudio(potentiallyUpdatedTargetResourceName);
+          } else if (targetResourceKind == "bitmapFont") {
+            ExposeBitmapFont(potentiallyUpdatedTargetResourceName);
+          } else if (targetResourceKind == "font") {
+            ExposeFont(potentiallyUpdatedTargetResourceName);
+          } else if (targetResourceKind == "image") {
+            ExposeImage(potentiallyUpdatedTargetResourceName);
+          } else if (targetResourceKind == "json") {
+            ExposeJson(potentiallyUpdatedTargetResourceName);
+          } else if (targetResourceKind == "tilemap") {
+            ExposeTilemap(potentiallyUpdatedTargetResourceName);
+          } else if (targetResourceKind == "tileset") {
+            ExposeTileset(potentiallyUpdatedTargetResourceName);
+          } else if (targetResourceKind == "video") {
+            ExposeVideo(potentiallyUpdatedTargetResourceName);
+          } else if (targetResourceKind == "model3D") {
+            ExposeModel3D(potentiallyUpdatedTargetResourceName);
+          }
+
+          if (potentiallyUpdatedTargetResourceName != targetResourceName) {
+            // The resource name was renamed. Also update the mapping.
+            child.second->SetStringValue(potentiallyUpdatedTargetResourceName);
+            anyEmbeddedResourceNameWasRenamed = true;
+          }
+        }
+      }
+
+      if (anyEmbeddedResourceNameWasRenamed) {
+        resource.SetMetadata(gd::Serializer::ToJSON(serializerElement));
+      }
+    }
+  }
+}
+
 void ArbitraryResourceWorker::ExposeResource(gd::Resource& resource) {
   if (!resource.UseFile()) return;
 
@@ -154,6 +232,18 @@ class ResourceWorkerInEventsWorker : public ArbitraryEventsWorker {
             gd::String updatedParameterValue = parameterValue;
             worker.ExposeJson(updatedParameterValue);
             instruction.SetParameter(parameterIndex, updatedParameterValue);
+          } else if (parameterMetadata.GetType() == "tilemapResource") {
+            gd::String updatedParameterValue = parameterValue;
+            worker.ExposeTilemap(updatedParameterValue);
+            instruction.SetParameter(parameterIndex, updatedParameterValue);
+          } else if (parameterMetadata.GetType() == "tilesetResource") {
+            gd::String updatedParameterValue = parameterValue;
+            worker.ExposeTileset(updatedParameterValue);
+            instruction.SetParameter(parameterIndex, updatedParameterValue);
+          } else if (parameterMetadata.GetType() == "model3DResource") {
+            gd::String updatedParameterValue = parameterValue;
+            worker.ExposeModel3D(updatedParameterValue);
+            instruction.SetParameter(parameterIndex, updatedParameterValue);
           }
         });
 

Core/GDCore/IDE/Project/ArbitraryResourceWorker.h

@@ -75,6 +75,21 @@ class GD_CORE_API ArbitraryResourceWorker {
    */
   virtual void ExposeJson(gd::String &jsonName);
 
+  /**
+   * \brief Expose a Tilemap, which is always a reference to a "tilemap" resource.
+   */
+  virtual void ExposeTilemap(gd::String &tilemapName);
+
+  /**
+   * \brief Expose a Tileset, which is always a reference to a "tileset" resource.
+   */
+  virtual void ExposeTileset(gd::String &tilesetName);
+
+  /**
+   * \brief Expose a 3D model, which is always a reference to a "model3D" resource.
+   */
+  virtual void ExposeModel3D(gd::String &resourceName);
+
   /**
    * \brief Expose a video, which is always a reference to a "video" resource.
    */
@@ -96,6 +111,11 @@ class GD_CORE_API ArbitraryResourceWorker {
    */
   virtual void ExposeFile(gd::String &resourceFileName) = 0;
 
+  /**
+   * \brief Expose the embedded resources of the specified resource.
+   */
+  virtual void ExposeEmbeddeds(gd::String &resourceName);
+
  protected:
   const std::vector<gd::ResourcesManager *> &GetResources() {
     return resourcesManagers;

Core/GDCore/IDE/Project/BehaviorObjectTypeRenamer.cpp

@@ -0,0 +1,25 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#include "BehaviorObjectTypeRenamer.h"
+
+#include "GDCore/Project/EventsBasedBehavior.h"
+#include "GDCore/String.h"
+#include <map>
+#include <memory>
+#include <vector>
+
+namespace gd {
+
+void BehaviorObjectTypeRenamer::DoVisitEventBasedBehavior(
+    gd::EventsBasedBehavior &eventsBasedBehavior) {
+  if (eventsBasedBehavior.GetObjectType() == oldObjectType) {
+    eventsBasedBehavior.SetObjectType(newObjectType);
+  }
+}
+
+BehaviorObjectTypeRenamer::~BehaviorObjectTypeRenamer() {}
+
+} // namespace gd

Core/GDCore/IDE/Project/BehaviorObjectTypeRenamer.h

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

Core/GDCore/IDE/Project/BehaviorsSharedDataBehaviorTypeRenamer.cpp

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

Core/GDCore/IDE/Project/BehaviorsSharedDataBehaviorTypeRenamer.h

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