Fix creating a local project in the right folder (#5621)

Co-authored-by: 4ian <4ian@users.noreply.github.com>

.circleci/config.yml

@@ -15,7 +15,7 @@ jobs:
   # Build the **entire** app for macOS.
   build-macos:
     macos:
-      xcode: 12.5.1
+      xcode: 14.2.0
     steps:
       - checkout
 
@@ -64,11 +64,11 @@ 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 && CI=false npm run build -- --mac --publish=never
 
       - run:
           name: Clean dist folder to keep only installers/binaries.
-          command: rm -rf "newIDE/electron-app/dist/mac/GDevelop 5.app" && rm -rf "newIDE/electron-app/dist/mac-arm64/GDevelop 5.app"
+          command: rm -rf "newIDE/electron-app/dist/mac-universal/GDevelop 5.app"
 
       # Upload artifacts (CircleCI)
       - store_artifacts:
@@ -101,8 +101,8 @@ jobs:
           command: sudo apt-get update && sudo apt install cmake
 
       - run:
-         name: Install Python3 dependencies for Emscripten
-         command: sudo apt install python-is-python3 python3-distutils -y
+          name: Install Python3 dependencies for Emscripten
+          command: sudo apt install python-is-python3 python3-distutils -y
 
       - run:
           name: Install Emscripten (for GDevelop.js)
@@ -178,8 +178,8 @@ jobs:
           command: sudo apt-get update && sudo apt install cmake
 
       - run:
-         name: Install Python3 dependencies for Emscripten
-         command: sudo apt install python-is-python3 python3-distutils -y
+          name: Install Python3 dependencies for Emscripten
+          command: sudo apt install python-is-python3 python3-distutils -y
 
       - run:
           name: Install Emscripten (for GDevelop.js)

.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 +1,14 @@
-// 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.'"
+  "image": "mcr.microsoft.com/devcontainers/universal:2",
+  "onCreateCommand": "cd newIDE/app && npm install && cd ../electron-app && npm install",
+  "forwardPorts": [3000],
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "esbenp.prettier-vscode",
+        "ms-vscode.cpptools",
+        "flowtype.flow-for-vscode"
+      ]
+    }
+  }
 }

.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

@@ -9,6 +9,10 @@ name: Build Storybook
 on:
   # Launch on all commits.
   push:
+    branches:
+      - "**"
+    tags-ignore:
+      - "**" # Don't run on new tags
   # Allows to run this workflow manually from the Actions tab,
   # to publish on Chromatic (not done by default).
   workflow_dispatch:
@@ -17,31 +21,23 @@ 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

.github/workflows/extract-translations.yml

@@ -4,6 +4,10 @@ name: Extract translations
 on:
   # Execute for all commits (to ensure translations extraction works)
   push:
+    branches:
+      - "**"
+    tags-ignore:
+      - "**" # Don't run on new tags
   # Allows to run this workflow manually from the Actions tab.
   workflow_dispatch:
 
@@ -11,20 +15,12 @@ jobs:
   extract-translations:
     runs-on: ubuntu-latest
     steps:
+      - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
           node-version: 16
-      - 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
-        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') }}
+          cache: "npm"
+          cache-dependency-path: "newIDE/app/package-lock.json"
 
       - name: Install gettext
         run: sudo apt update && sudo apt install gettext -y

.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

@@ -7,6 +7,8 @@ on:
   push:
     branches:
       - master
+    tags-ignore:
+      - "**" # Don't run on new tags
   # Allows to run this workflow manually from the Actions tab.
   workflow_dispatch:
 
@@ -14,20 +16,12 @@ jobs:
   update-translations:
     runs-on: ubuntu-latest
     steps:
+      - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
           node-version: 16
-      - 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
-        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') }}
+          cache: "npm"
+          cache-dependency-path: "newIDE/app/package-lock.json"
 
       - name: Install gettext
         run: sudo apt update && sudo apt install gettext -y
@@ -64,7 +58,7 @@ 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

.vscode/settings.json

@@ -1,131 +1,134 @@
 // Place your settings in this file to overwrite default and user settings.
 {
-    "files.associations": {
-        "*.idl": "java",
-        "Fastfile": "ruby",
-        "iosfwd": "cpp",
-        "functional": "cpp",
-        "type_traits": "cpp",
-        "utility": "cpp",
-        "algorithm": "cpp",
-        "random": "cpp",
-        "__config": "cpp",
-        "cstddef": "cpp",
-        "exception": "cpp",
-        "initializer_list": "cpp",
-        "new": "cpp",
-        "stdexcept": "cpp",
-        "typeinfo": "cpp",
-        "*.tcc": "cpp",
-        "cctype": "cpp",
-        "clocale": "cpp",
-        "cmath": "cpp",
-        "complex": "cpp",
-        "cstdarg": "cpp",
-        "cstdio": "cpp",
-        "cstdlib": "cpp",
-        "ctime": "cpp",
-        "cwchar": "cpp",
-        "cwctype": "cpp",
-        "istream": "cpp",
-        "limits": "cpp",
-        "memory": "cpp",
-        "ostream": "cpp",
-        "sstream": "cpp",
-        "streambuf": "cpp",
-        "hashtable": "cpp",
-        "tuple": "cpp",
-        "unordered_map": "cpp",
-        "unordered_set": "cpp",
-        "__split_buffer": "cpp",
-        "deque": "cpp",
-        "iterator": "cpp",
-        "list": "cpp",
-        "map": "cpp",
-        "queue": "cpp",
-        "regex": "cpp",
-        "set": "cpp",
-        "stack": "cpp",
-        "string": "cpp",
-        "vector": "cpp",
-        "iostream": "cpp",
-        "__functional_03": "cpp",
-        "__hash_table": "cpp",
-        "__tree": "cpp",
-        "bitset": "cpp",
-        "__bit_reference": "cpp",
-        "__mutex_base": "cpp",
-        "fstream": "cpp",
-        "ios": "cpp",
-        "__locale": "cpp",
-        "valarray": "cpp",
-        "freeglut_spaceball.c": "cpp",
-        "__tuple": "cpp",
-        "hash_map": "cpp",
-        "hash_set": "cpp",
-        "system_error": "cpp",
-        "__nullptr": "cpp",
-        "__functional_base": "cpp",
-        "__functional_base_03": "cpp",
-        "chrono": "cpp",
-        "ratio": "cpp",
-        "atomic": "cpp",
-        "locale": "cpp",
-        "string_view": "cpp",
-        "__string": "cpp",
-        "cstring": "cpp",
-        "iomanip": "cpp",
-        "cstdint": "cpp",
-        "forward_list": "cpp",
-        "mutex": "cpp",
-        "__hash": "cpp",
-        "__debug": "cpp",
-        "__threading_support": "cpp",
-        "any": "cpp",
-        "array": "cpp",
-        "cinttypes": "cpp",
-        "numeric": "cpp",
-        "__memory": "cpp",
-        "__errc": "cpp",
-        "__node_handle": "cpp",
-        "bit": "cpp",
-        "optional": "cpp",
-        "filesystem": "cpp",
-        "compare": "cpp",
-        "concepts": "cpp",
-        "xfacet": "cpp",
-        "xhash": "cpp",
-        "xiosbase": "cpp",
-        "xlocale": "cpp",
-        "xlocinfo": "cpp",
-        "xlocmon": "cpp",
-        "xlocnum": "cpp",
-        "xloctime": "cpp",
-        "xmemory": "cpp",
-        "xstddef": "cpp",
-        "xstring": "cpp",
-        "xtr1common": "cpp",
-        "xtree": "cpp",
-        "xutility": "cpp",
-        "xlocbuf": "cpp",
-        "xlocmes": "cpp",
-        "xmemory0": "cpp",
-        "memory_resource": "cpp"
-    },
-    "files.exclude": {
-        "Binaries/*build*": true,
-        "Binaries/Output": true,
-        "GDJS/Runtime-dist": true,
-        "docs": true,
-        "newIDE/electron-app/dist": true,
-        "newIDE/app/build": true,
-        "newIDE/app/resources/GDJS": true,
-        "newIDE/electron-app/app/www": true
-    },
-    // Support for Flowtype (for newIDE):
-    "javascript.validate.enable": false,
-    "flow.useNPMPackagedFlow": true,
+  "files.associations": {
+    "*.idl": "java",
+    "Fastfile": "ruby",
+    "iosfwd": "cpp",
+    "functional": "cpp",
+    "type_traits": "cpp",
+    "utility": "cpp",
+    "algorithm": "cpp",
+    "random": "cpp",
+    "__config": "cpp",
+    "cstddef": "cpp",
+    "exception": "cpp",
+    "initializer_list": "cpp",
+    "new": "cpp",
+    "stdexcept": "cpp",
+    "typeinfo": "cpp",
+    "*.tcc": "cpp",
+    "cctype": "cpp",
+    "clocale": "cpp",
+    "cmath": "cpp",
+    "complex": "cpp",
+    "cstdarg": "cpp",
+    "cstdio": "cpp",
+    "cstdlib": "cpp",
+    "ctime": "cpp",
+    "cwchar": "cpp",
+    "cwctype": "cpp",
+    "istream": "cpp",
+    "limits": "cpp",
+    "memory": "cpp",
+    "ostream": "cpp",
+    "sstream": "cpp",
+    "streambuf": "cpp",
+    "hashtable": "cpp",
+    "tuple": "cpp",
+    "unordered_map": "cpp",
+    "unordered_set": "cpp",
+    "__split_buffer": "cpp",
+    "deque": "cpp",
+    "iterator": "cpp",
+    "list": "cpp",
+    "map": "cpp",
+    "queue": "cpp",
+    "regex": "cpp",
+    "set": "cpp",
+    "stack": "cpp",
+    "string": "cpp",
+    "vector": "cpp",
+    "iostream": "cpp",
+    "__functional_03": "cpp",
+    "__hash_table": "cpp",
+    "__tree": "cpp",
+    "bitset": "cpp",
+    "__bit_reference": "cpp",
+    "__mutex_base": "cpp",
+    "fstream": "cpp",
+    "ios": "cpp",
+    "__locale": "cpp",
+    "valarray": "cpp",
+    "freeglut_spaceball.c": "cpp",
+    "__tuple": "cpp",
+    "hash_map": "cpp",
+    "hash_set": "cpp",
+    "system_error": "cpp",
+    "__nullptr": "cpp",
+    "__functional_base": "cpp",
+    "__functional_base_03": "cpp",
+    "chrono": "cpp",
+    "ratio": "cpp",
+    "atomic": "cpp",
+    "locale": "cpp",
+    "string_view": "cpp",
+    "__string": "cpp",
+    "cstring": "cpp",
+    "iomanip": "cpp",
+    "cstdint": "cpp",
+    "forward_list": "cpp",
+    "mutex": "cpp",
+    "__hash": "cpp",
+    "__debug": "cpp",
+    "__threading_support": "cpp",
+    "any": "cpp",
+    "array": "cpp",
+    "cinttypes": "cpp",
+    "numeric": "cpp",
+    "__memory": "cpp",
+    "__errc": "cpp",
+    "__node_handle": "cpp",
+    "bit": "cpp",
+    "optional": "cpp",
+    "filesystem": "cpp",
+    "compare": "cpp",
+    "concepts": "cpp",
+    "xfacet": "cpp",
+    "xhash": "cpp",
+    "xiosbase": "cpp",
+    "xlocale": "cpp",
+    "xlocinfo": "cpp",
+    "xlocmon": "cpp",
+    "xlocnum": "cpp",
+    "xloctime": "cpp",
+    "xmemory": "cpp",
+    "xstddef": "cpp",
+    "xstring": "cpp",
+    "xtr1common": "cpp",
+    "xtree": "cpp",
+    "xutility": "cpp",
+    "xlocbuf": "cpp",
+    "xlocmes": "cpp",
+    "xmemory0": "cpp",
+    "memory_resource": "cpp",
+    "__bits": "cpp",
+    "__verbose_abort": "cpp",
+    "variant": "cpp"
+  },
+  "files.exclude": {
+    "Binaries/*build*": true,
+    "Binaries/Output": true,
+    "GDJS/Runtime-dist": true,
+    "docs": true,
+    "newIDE/electron-app/dist": true,
+    "newIDE/app/build": true,
+    "newIDE/app/resources/GDJS": true,
+    "newIDE/electron-app/app/www": true
+  },
+  // Support for Flowtype (for newIDE):
+  "javascript.validate.enable": false,
+  "flow.useNPMPackagedFlow": true,
 
-    // Clang format styling (duplicated in scripts/CMakeClangUtils.txt)
-    "C_Cpp.clang_format_style": "{BasedOnStyle: Google, BinPackParameters: false, BinPackArguments: false}"
+  // Clang format styling (duplicated in scripts/CMakeClangUtils.txt)
+  "C_Cpp.clang_format_style": "{BasedOnStyle: Google, BinPackParameters: false, BinPackArguments: false}"
 }

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

@@ -1,100 +1,99 @@
-#This is the CMake file used to build GDevelop.
-#For more information, see the Readme.md file.
+# This is the CMake file used to build GDevelop.
+# For more information, see the README.md file.
 
-cmake_minimum_required(VERSION 2.6)
-cmake_policy(SET CMP0011 NEW)
+cmake_minimum_required(VERSION 3.5)
 
 # Add utility functions
 include(scripts/CMakeClangUtils.txt) # To add clang-format and clang-tidy support to a target
 
 # Macro for defining an option
 macro(gd_set_option var default type docstring)
-    if(NOT DEFINED ${var})
-        set(${var} ${default})
-    endif()
-    set(${var} ${${var}} CACHE ${type} ${docstring} FORCE)
+	if(NOT DEFINED ${var})
+		set(${var} ${default})
+	endif()
+	set(${var} ${${var}} CACHE ${type} ${docstring} FORCE)
 endmacro()
+
+# Set options
 gd_set_option(BUILD_CORE TRUE BOOL "TRUE to build GDevelop Core library")
 gd_set_option(BUILD_GDJS TRUE BOOL "TRUE to build GDevelop JS Platform")
 gd_set_option(BUILD_EXTENSIONS TRUE BOOL "TRUE to build the extensions")
 gd_set_option(BUILD_TESTS TRUE BOOL "TRUE to build the tests")
 
 # Disable deprecated code
-set(NO_GUI TRUE CACHE BOOL "" FORCE) #Force disable old GUI related code.
+set(NO_GUI TRUE CACHE BOOL "" FORCE) # Force disable old GUI related code.
 
-#Setting up installation directory, for Linux (has to be done before "project" command).
-IF(NOT WIN32)
-	if (NOT APPLE)
-	gd_set_option(GD_INSTALL_PREFIX "/opt/gdevelop/" STRING "The directory where GDevelop should be installed")
-	ELSE()
-	gd_set_option(GD_INSTALL_PREFIX "." STRING "The directory where GDevelop should be installed")
-	ENDIF()
+# Setting up installation directory, for Linux (has to be done before "project" command).
+if(NOT WIN32)
+	if(NOT APPLE)
+		gd_set_option(GD_INSTALL_PREFIX "/opt/gdevelop/" STRING "The directory where GDevelop should be installed")
+	else()
+		gd_set_option(GD_INSTALL_PREFIX "." STRING "The directory where GDevelop should be installed")
+	endif()
 
-	#As we embed SFML, prevent it to be installed system-wide
+	# As we embed SFML, prevent it to be installed system-wide
 	set(CMAKE_INSTALL_PREFIX "${GD_INSTALL_PREFIX}/useless")
-ENDIF()
+endif()
 
 project(GDevelop)
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
-IF(NOT WIN32 AND NOT APPLE AND NOT BUILD_TESTS)
-	SET(CMAKE_SKIP_BUILD_RPATH  TRUE) #Avoid errors when packaging for linux.
-ENDIF()
-IF(APPLE)
+if(NOT WIN32 AND NOT APPLE AND NOT BUILD_TESTS)
+	set(CMAKE_SKIP_BUILD_RPATH TRUE) # Avoid errors when packaging for linux.
+endif()
+if(APPLE)
 	set(CMAKE_MACOSX_RPATH 1)
 	set(CMAKE_INSTALL_RPATH_USE_LINK_PATH FALSE)
 	set(CMAKE_INSTALL_RPATH ".")
 	set(CMAKE_BUILD_WITH_INSTALL_RPATH TRUE)
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D_WCHAR_H_CPLUSPLUS_98_CONFORMANCE_")
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-potentially-evaluated-expression")
-ENDIF()
-#Sanity checks
-IF ("${CMAKE_BUILD_TYPE}" STREQUAL "")
-	message( "CMAKE_BUILD_TYPE is empty, assuming build type is Release" )
+	add_compile_options(
+		-D_WCHAR_H_CPLUSPLUS_98_CONFORMANCE_
+		-Wno-potentially-evaluated-expression)
+endif()
+# Sanity checks
+if("${CMAKE_BUILD_TYPE}" STREQUAL "")
+	message(STATUS "CMAKE_BUILD_TYPE is empty, assuming build type is Release")
 	set(CMAKE_BUILD_TYPE Release)
-ENDIF()
+endif()
 
-IF("${CMAKE_BUILD_TYPE}" STREQUAL "Release" AND NOT WIN32 AND CMAKE_COMPILER_IS_GNUCXX)
-	SET(CMAKE_SHARED_LINKER_FLAGS "-s") #Force stripping to avoid errors when packaging for linux.
-ENDIF()
+if("${CMAKE_BUILD_TYPE}" STREQUAL "Release" AND NOT WIN32 AND CMAKE_COMPILER_IS_GNUCXX)
+	set(CMAKE_SHARED_LINKER_FLAGS "-s") # Force stripping to avoid errors when packaging for linux.
+endif()
 
 #Activate C++11
-include(CheckCXXCompilerFlag)
-CHECK_CXX_COMPILER_FLAG("-std=gnu++11" COMPILER_SUPPORTS_CXX11)
-CHECK_CXX_COMPILER_FLAG("-std=gnu++0x" COMPILER_SUPPORTS_CXX0X)
-if(COMPILER_SUPPORTS_CXX11)
-       set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++11")
-elseif(COMPILER_SUPPORTS_CXX0X)
-       set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++0x")
-else()
-    message(FATAL_ERROR "The compiler ${CMAKE_CXX_COMPILER} has no C++11 support (with GNU extensions). Please use a different C++ compiler.")
-endif()
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 # Mark some warnings as errors
 if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
 	# Activate as much warnings as possible to avoid errors like
 	# uninitialized variables or other hard to debug bugs.
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall")
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-unknown-warning-option")
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-reorder-ctor -Wno-reorder -Wno-pessimizing-move -Wno-unused-variable -Wno-unused-private-field")
+	add_compile_options(
+		-Wall
+		-Wno-unknown-warning-option
+		-Wno-reorder-ctor
+		-Wno-reorder
+		-Wno-pessimizing-move
+		-Wno-unused-variable
+		-Wno-unused-private-field
 
-	# Make as much warnings considered as errors as possible (only one for now).
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror=return-stack-address")
+		# Make as much warnings considered as errors as possible (only one for now).
+		-Werror=return-stack-address)
 endif()
 
-#Define common directories:
+# Define common directories:
 set(GD_base_dir ${CMAKE_CURRENT_SOURCE_DIR})
 
-#Add all the CMakeLists:
-ADD_SUBDIRECTORY(ExtLibs)
-IF(BUILD_CORE)
-	ADD_SUBDIRECTORY(Core)
-ENDIF()
-IF(BUILD_GDJS)
-	ADD_SUBDIRECTORY(GDJS)
-ENDIF()
-IF(EMSCRIPTEN)
-	ADD_SUBDIRECTORY(GDevelop.js)
-ENDIF()
-IF(BUILD_EXTENSIONS)
-	ADD_SUBDIRECTORY(Extensions)
-ENDIF()
+# Add all the CMakeLists:
+add_subdirectory(ExtLibs)
+if(BUILD_CORE)
+	add_subdirectory(Core)
+endif()
+if(BUILD_GDJS)
+	add_subdirectory(GDJS)
+endif()
+if(EMSCRIPTEN)
+	add_subdirectory(GDevelop.js)
+endif()
+if(BUILD_EXTENSIONS)
+	add_subdirectory(Extensions)
+endif()

Core/CMakeLists.txt

@@ -1,83 +1,98 @@
-cmake_minimum_required(VERSION 2.6)
-cmake_policy(SET CMP0015 NEW)
+cmake_minimum_required(VERSION 3.5)
 
 project(GDCore)
 
-SET(CMAKE_C_USE_RESPONSE_FILE_FOR_OBJECTS 1) #Force use response file: useful for Ninja build system on Windows.
-SET(CMAKE_CXX_USE_RESPONSE_FILE_FOR_OBJECTS 1)
-SET(CMAKE_C_USE_RESPONSE_FILE_FOR_INCLUDES 1)
-SET(CMAKE_CXX_USE_RESPONSE_FILE_FOR_INCLUDES 1)
+set(CMAKE_C_USE_RESPONSE_FILE_FOR_OBJECTS 1) # Force use response file: useful for Ninja build system on Windows.
+set(CMAKE_CXX_USE_RESPONSE_FILE_FOR_OBJECTS 1)
+set(CMAKE_C_USE_RESPONSE_FILE_FOR_INCLUDES 1)
+set(CMAKE_CXX_USE_RESPONSE_FILE_FOR_INCLUDES 1)
 
-#Define common directories:
+# Define common directories:
 set(GDCORE_include_dir ${GD_base_dir}/Core PARENT_SCOPE)
 set(GDCORE_lib_dir ${GD_base_dir}/Binaries/Output/${CMAKE_BUILD_TYPE}_${CMAKE_SYSTEM_NAME} PARENT_SCOPE)
 
-#Dependencies on external libraries:
-###
+# Dependencies on external libraries:
+#
 
-#Defines
-###
-add_definitions( -DGD_IDE_ONLY )
-IF (EMSCRIPTEN)
-	add_definitions( -DEMSCRIPTEN )
-ENDIF()
-IF(CMAKE_BUILD_TYPE MATCHES "Debug")
-	add_definitions( -DDEBUG )
-ELSE()
-	add_definitions( -DRELEASE )
-ENDIF()
+# Defines
+#
+add_definitions(-DGD_IDE_ONLY)
+if(EMSCRIPTEN)
+	add_definitions(-DEMSCRIPTEN)
+endif()
+if("${CMAKE_BUILD_TYPE}" MATCHES "Debug")
+	add_definitions(-DDEBUG)
+else()
+	add_definitions(-DRELEASE)
+endif()
 
-IF(WIN32)
-	add_definitions( -DWINDOWS )
-	add_definitions( "-DGD_CORE_API=__declspec(dllexport)" )
-	add_definitions( -D__GNUWIN32__ )
-ELSE()
-    IF(APPLE)
-    add_definitions( -DMACOS )
-    ELSE()
-	add_definitions( -DLINUX )
-	ENDIF()
-	add_definitions( -DGD_API= )
-	add_definitions( -DGD_CORE_API= )
-ENDIF(WIN32)
+if(WIN32)
+	add_definitions(-DWINDOWS)
+	add_definitions("-DGD_CORE_API=__declspec(dllexport)")
+	add_definitions(-D__GNUWIN32__)
+else()
+	if(APPLE)
+		add_definitions(-DMACOS)
+	else()
+		add_definitions(-DLINUX)
+	endif()
+	add_definitions(-DGD_API=)
+	add_definitions(-DGD_CORE_API=)
+endif()
 
-#The target
-###
+# The target
+#
 include_directories(.)
-file(GLOB_RECURSE source_files GDCore/*)
+file(
+	GLOB_RECURSE
+	source_files
+	GDCore/*)
 
-file(GLOB_RECURSE formatted_source_files tests/* GDCore/Events/* GDCore/Extensions/* GDCore/IDE/* GDCore/Project/* GDCore/Serialization/* GDCore/Tools/*)
-list(REMOVE_ITEM formatted_source_files "${CMAKE_CURRENT_SOURCE_DIR}/GDCore/IDE/Dialogs/GDCoreDialogs.cpp" "${CMAKE_CURRENT_SOURCE_DIR}/GDCore/IDE/Dialogs/GDCoreDialogs.h" "${CMAKE_CURRENT_SOURCE_DIR}/GDCore/IDE/Dialogs/GDCoreDialogs_dialogs_bitmaps.cpp")
+file(
+	GLOB_RECURSE
+	formatted_source_files
+	tests/*
+	GDCore/Events/*
+	GDCore/Extensions/*
+	GDCore/IDE/*
+	GDCore/Project/*
+	GDCore/Serialization/*
+	GDCore/Tools/*)
+list(
+	REMOVE_ITEM
+	formatted_source_files
+	"${CMAKE_CURRENT_SOURCE_DIR}/GDCore/IDE/Dialogs/GDCoreDialogs.cpp"
+	"${CMAKE_CURRENT_SOURCE_DIR}/GDCore/IDE/Dialogs/GDCoreDialogs.h"
+	"${CMAKE_CURRENT_SOURCE_DIR}/GDCore/IDE/Dialogs/GDCoreDialogs_dialogs_bitmaps.cpp")
 gd_add_clang_utils(GDCore "${formatted_source_files}")
 
-IF(EMSCRIPTEN)
+if(EMSCRIPTEN)
 	# Emscripten treats all libraries as static libraries
 	add_library(GDCore STATIC ${source_files})
-ELSE()
+else()
 	add_library(GDCore SHARED ${source_files})
-ENDIF()
-IF(EMSCRIPTEN)
+endif()
+if(EMSCRIPTEN)
 	set_target_properties(GDCore PROPERTIES SUFFIX ".bc")
-ELSEIF(WIN32)
+elseif(WIN32)
 	set_target_properties(GDCore PROPERTIES PREFIX "")
-ELSE()
+else()
 	set_target_properties(GDCore PROPERTIES PREFIX "lib")
-ENDIF()
+endif()
 set(LIBRARY_OUTPUT_PATH ${GD_base_dir}/Binaries/Output/${CMAKE_BUILD_TYPE}_${CMAKE_SYSTEM_NAME})
 set(ARCHIVE_OUTPUT_PATH ${GD_base_dir}/Binaries/Output/${CMAKE_BUILD_TYPE}_${CMAKE_SYSTEM_NAME})
 set(RUNTIME_OUTPUT_PATH ${GD_base_dir}/Binaries/Output/${CMAKE_BUILD_TYPE}_${CMAKE_SYSTEM_NAME})
 
-#Tests
-###
+# Tests
+#
 if(BUILD_TESTS)
 	file(
-	    GLOB_RECURSE
-	    test_source_files
-	    tests/*
-	)
+		GLOB_RECURSE
+		test_source_files
+		tests/*)
 
 	add_executable(GDCore_tests ${test_source_files})
-	set_target_properties(GDCore_tests PROPERTIES BUILD_WITH_INSTALL_RPATH FALSE) #Allow finding dependencies directly from build path on Mac OS X.
+	set_target_properties(GDCore_tests PROPERTIES BUILD_WITH_INSTALL_RPATH FALSE) # Allow finding dependencies directly from build path on Mac OS X.
 	target_link_libraries(GDCore_tests GDCore)
 	target_link_libraries(GDCore_tests ${CMAKE_DL_LIBS})
 endif()

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/ForEachEvent.cpp

@@ -15,7 +15,7 @@ using namespace std;
 namespace gd {
 
 ForEachEvent::ForEachEvent()
-    : BaseEvent(), objectsToPick(""), objectsToPickSelected(false) {}
+    : BaseEvent(), objectsToPick("") {}
 
 vector<gd::InstructionsList*> ForEachEvent::GetAllConditionsVectors() {
   vector<gd::InstructionsList*> allConditions;

Core/GDCore/Events/Builtin/ForEachEvent.h

@@ -6,6 +6,8 @@
 
 #ifndef FOREACHEVENT_H
 #define FOREACHEVENT_H
+#include <vector>
+
 #include "GDCore/Events/Event.h"
 #include "GDCore/Events/EventsList.h"
 namespace gd {
@@ -62,13 +64,17 @@ class GD_CORE_API ForEachEvent : public gd::BaseEvent {
   virtual void UnserializeFrom(gd::Project& project,
                                const SerializerElement& element);
 
+  std::vector<gd::Expression*> GetAllObjectExpressions() {
+    std::vector<gd::Expression*> allObjectExpressions;
+    allObjectExpressions.push_back(&objectsToPick);
+    return allObjectExpressions;
+  }
+
  private:
   gd::Expression objectsToPick;
   gd::InstructionsList conditions;
   gd::InstructionsList actions;
   gd::EventsList events;
-
-  bool objectsToPickSelected;
 };
 
 }  // 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;
 
@@ -130,30 +131,46 @@ void LinkEvent::SerializeTo(SerializerElement& element) const {
 
 void LinkEvent::UnserializeFrom(gd::Project& project,
                                 const SerializerElement& element) {
-  SerializerElement& includeElement = element.GetChild("include", 0, "Limites");
-
   SetTarget(element.GetChild("target", 0, "Scene").GetValue().GetString());
 
-  if (includeElement.HasAttribute("includeAll")) {
-    // Compatibility with GDevelop <= 4.0.92
-    if (includeElement.GetBoolAttribute("includeAll", true)) {
-      SetIncludeAllEvents();
+  // Compatibility with GD <= 5
+  if (element.HasChild("include", "Limites")) {
+    SerializerElement& includeElement = element.GetChild("include", 0, "Limites");
+    if (includeElement.HasAttribute("includeAll")) {
+      // Compatibility with GDevelop <= 4.0.92
+      if (includeElement.GetBoolAttribute("includeAll", true)) {
+        SetIncludeAllEvents();
+      } else {
+        SetIncludeStartAndEnd(includeElement.GetIntAttribute("start"),
+                              includeElement.GetIntAttribute("end"));
+      }
     } else {
-      SetIncludeStartAndEnd(includeElement.GetIntAttribute("start"),
-                            includeElement.GetIntAttribute("end"));
+      // GDevelop > 4.0.92
+      IncludeConfig config = static_cast<IncludeConfig>(
+          includeElement.GetIntAttribute("includeConfig", 0));
+      if (config == INCLUDE_ALL)
+        SetIncludeAllEvents();
+      else if (config == INCLUDE_EVENTS_GROUP)
+        SetIncludeEventsGroup(includeElement.GetStringAttribute("eventsGroup"));
+      else if (config == INCLUDE_BY_INDEX)
+        SetIncludeStartAndEnd(includeElement.GetIntAttribute("start"),
+                              includeElement.GetIntAttribute("end"));
     }
   } else {
-    // GDevelop > 4.0.92
-    IncludeConfig config = static_cast<IncludeConfig>(
-        includeElement.GetIntAttribute("includeConfig", 0));
-    if (config == INCLUDE_ALL)
-      SetIncludeAllEvents();
-    else if (config == INCLUDE_EVENTS_GROUP)
-      SetIncludeEventsGroup(includeElement.GetStringAttribute("eventsGroup"));
-    else if (config == INCLUDE_BY_INDEX)
-      SetIncludeStartAndEnd(includeElement.GetIntAttribute("start"),
-                            includeElement.GetIntAttribute("end"));
+    // Since GDevelop 5, links always include all events.
+    SetIncludeAllEvents();
   }
+  // end of compatibility code
+}
+
+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/EffectsCodeGenerator.cpp

@@ -15,16 +15,48 @@
 #include "GDCore/Project/Layout.h"
 #include "GDCore/Project/Object.h"
 #include "GDCore/Project/Project.h"
+#include "GDCore/IDE/ProjectBrowserHelper.h"
 
 namespace gd {
 
-void ExposeProjectEffects(
-    const gd::Project& project,
-    const std::function<void(const gd::Effect& effect)>& worker) {
+void EffectsCodeGenerator::DoVisitObject(gd::Object &object) {
+  auto &effects = object.GetEffects();
+  for (std::size_t e = 0; e < effects.GetEffectsCount(); e++) {
+    auto &effect = effects.GetEffect(e);
+    AddEffectIncludeFiles(effect);
+  }
+};
+
+void EffectsCodeGenerator::AddEffectIncludeFiles(const gd::Effect &effect) {
+  // TODO: this browse all the extensions every time we're trying to find
+  // a new effect. Might be a good idea to rework MetadataProvider to be
+  // faster (not sure if it is a bottleneck at all though - but could be
+  // for events code generation).
+  const gd::EffectMetadata &effectMetadata =
+      MetadataProvider::GetEffectMetadata(platform, effect.GetEffectType());
+
+  for (auto &includeFile : effectMetadata.GetIncludeFiles())
+    includeFiles.insert(includeFile);
+};
+
+void EffectsCodeGenerator::GenerateEffectsIncludeFiles(
+    const gd::Platform &platform,
+    gd::Project &project,
+    std::set<gd::String> &includeFiles) {
+  // TODO Add unit tests on this function.
+  
+  // TODO Merge with UsedExtensionsFinder.
+  // Default lights rely on the fact that UsedExtensionsFinder doesn't find
+  // extension usages for effects. This has the happy side effect of not
+  // including Three.js when no 3D object are in the scenes.
+  // We need to make something explicit to avoid future bugs.
+
   // See also gd::Project::ExposeResources for a method that traverse the whole
   // project (this time for resources) and
   // WholeProjectRefactorer::ExposeProjectEvents.
 
+  EffectsCodeGenerator effectsCodeGenerator(platform, includeFiles);
+
   // Add layouts effects
   for (std::size_t s = 0; s < project.GetLayoutsCount(); s++) {
     auto& layout = project.GetLayout(s);
@@ -33,47 +65,13 @@ void ExposeProjectEffects(
       auto& effects = layout.GetLayer(l).GetEffects();
       for (std::size_t e = 0; e < effects.GetEffectsCount(); ++e) {
         auto& effect = effects.GetEffect(e);
-        worker(effect);
-      }
-    }
-
-    for (std::size_t i = 0; i < layout.GetObjectsCount(); i++) {
-      auto& object = layout.GetObject(i);
-      auto& effects = object.GetEffects();
-      for (std::size_t e = 0; e < effects.GetEffectsCount(); e++) {
-        auto& effect = effects.GetEffect(e);
-        worker(effect);
+        effectsCodeGenerator.AddEffectIncludeFiles(effect);
       }
     }
   }
 
-  // Add global object effects
-  for (std::size_t s = 0; s < project.GetObjectsCount(); s++) {
-    auto& effects = project.GetObject(s).GetEffects();
-    for (std::size_t e = 0; e < effects.GetEffectsCount(); e++) {
-      auto& effect = effects.GetEffect(e);
-      worker(effect);
-    }
-  }
-}
-
-void EffectsCodeGenerator::GenerateEffectsIncludeFiles(
-    const gd::Platform& platform,
-    const gd::Project& project,
-    std::set<gd::String>& includeFiles) {
-  ExposeProjectEffects(
-      project, [&platform, &includeFiles](const gd::Effect& effect) {
-        // TODO: this browse all the extensions every time we're trying to find
-        // a new effect. Might be a good idea to rework MetadataProvider to be
-        // faster (not sure if it is a bottleneck at all though - but could be
-        // for events code generation).
-        const gd::EffectMetadata& effectMetadata =
-            MetadataProvider::GetEffectMetadata(platform,
-                                                effect.GetEffectType());
-
-        for (auto& includeFile : effectMetadata.GetIncludeFiles())
-          includeFiles.insert(includeFile);
-      });
+  // Add objects effects
+  gd::ProjectBrowserHelper::ExposeProjectObjects(project, effectsCodeGenerator);
 }
 
 }  // namespace gd

Core/GDCore/Events/CodeGeneration/EffectsCodeGenerator.h

@@ -3,16 +3,18 @@
  * Copyright 2008-present Florian Rival (Florian.Rival@gmail.com). All rights
  * reserved. This project is released under the MIT License.
  */
-#ifndef GDCORE_EffectsCodeGenerator_H
-#define GDCORE_EffectsCodeGenerator_H
+#pragma once
 
 #include <set>
 #include <utility>
 #include <vector>
 #include "GDCore/String.h"
+#include "GDCore/IDE/Project/ArbitraryObjectsWorker.h"
+
 namespace gd {
 class Project;
 class Platform;
+class Effect;
 }  // namespace gd
 
 namespace gd {
@@ -20,16 +22,26 @@ namespace gd {
 /**
  * \brief Internal class used to generate code from events
  */
-class GD_CORE_API EffectsCodeGenerator {
- public:
+class GD_CORE_API EffectsCodeGenerator : public ArbitraryObjectsWorker {
+public:
   /**
    * \brief Add all the include files required by the project effects.
    */
   static void GenerateEffectsIncludeFiles(const gd::Platform& platform,
-                                          const gd::Project& project,
+                                          gd::Project& project,
                                           std::set<gd::String>& includeFiles);
+
+private:
+  EffectsCodeGenerator(const gd::Platform &platform_,
+                       std::set<gd::String> &includeFiles_)
+      : platform(platform_), includeFiles(includeFiles_){};
+
+  void AddEffectIncludeFiles(const gd::Effect& effect);
+
+  void DoVisitObject(gd::Object &object) override;
+
+  const gd::Platform &platform;
+  std::set<gd::String> &includeFiles;
 };
 
 }  // namespace gd
-
-#endif  // GDCORE_EffectsCodeGenerator_H

Core/GDCore/Events/CodeGeneration/EventsCodeGenerator.cpp

@@ -267,14 +267,12 @@ gd::String EventsCodeGenerator::GenerateConditionCode(
     return "/* Unknown instruction - skipped. */";
   }
 
-  AddIncludeFiles(instrInfos.codeExtraInformation.GetIncludeFiles());
+  AddIncludeFiles(instrInfos.GetIncludeFiles());
   maxConditionsListsSize =
       std::max(maxConditionsListsSize, condition.GetSubInstructions().size());
 
-  if (instrInfos.codeExtraInformation.HasCustomCodeGenerator()) {
+  if (instrInfos.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 =
@@ -325,11 +323,6 @@ gd::String EventsCodeGenerator::GenerateConditionCode(
         const ObjectMetadata& objInfo =
             MetadataProvider::GetObjectMetadata(platform, objectType);
 
-        if (objInfo.IsUnsupportedBaseObjectCapability(
-                instrInfos.GetRequiredBaseObjectCapability())) {
-          conditionCode +=
-              "/* Object with unsupported capability - skipped. */\n";
-        } else {
           AddIncludeFiles(objInfo.includeFiles);
           context.SetCurrentObject(realObjects[i]);
           context.ObjectsListNeeded(realObjects[i]);
@@ -346,7 +339,6 @@ gd::String EventsCodeGenerator::GenerateConditionCode(
                                                    context);
 
           context.SetNoCurrentObject();
-        }
       }
     }
   } else if (instrInfos.IsBehaviorInstruction()) {
@@ -461,9 +453,9 @@ gd::String EventsCodeGenerator::GenerateActionCode(
     return "/* Unknown instruction - skipped. */";
   }
 
-  AddIncludeFiles(instrInfos.codeExtraInformation.GetIncludeFiles());
+  AddIncludeFiles(instrInfos.GetIncludeFiles());
 
-  if (instrInfos.codeExtraInformation.HasCustomCodeGenerator()) {
+  if (instrInfos.HasCustomCodeGenerator()) {
     return instrInfos.codeExtraInformation.customCodeGenerator(
         action, *this, context);
   }
@@ -483,7 +475,7 @@ 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();
@@ -517,10 +509,6 @@ gd::String EventsCodeGenerator::GenerateActionCode(
         const ObjectMetadata& objInfo =
             MetadataProvider::GetObjectMetadata(platform, objectType);
 
-        if (objInfo.IsUnsupportedBaseObjectCapability(
-                instrInfos.GetRequiredBaseObjectCapability())) {
-          actionCode += "/* Object with unsupported capability - skipped. */\n";
-        } else {
           AddIncludeFiles(objInfo.includeFiles);
           context.SetCurrentObject(realObjects[i]);
           context.ObjectsListNeeded(realObjects[i]);
@@ -537,7 +525,6 @@ gd::String EventsCodeGenerator::GenerateActionCode(
                                              optionalAsyncCallbackName);
 
           context.SetNoCurrentObject();
-        }
       }
     }
   } else if (instrInfos.IsBehaviorInstruction()) {
@@ -729,6 +716,7 @@ gd::String EventsCodeGenerator::GenerateParameterCodes(
              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") {
@@ -975,6 +963,8 @@ void EventsCodeGenerator::DeleteUselessEvents(gd::EventsList& events) {
  */
 void EventsCodeGenerator::PreprocessEventList(gd::EventsList& listEvent) {
   for (std::size_t i = 0; i < listEvent.GetEventsCount(); ++i) {
+    if (listEvent[i].IsDisabled()) continue;
+
     listEvent[i].Preprocess(*this, listEvent, i);
     if (i <
         listEvent.GetEventsCount()) {  // Be sure that that there is still an
@@ -1020,15 +1010,15 @@ 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) + ")";
   }
 
@@ -1041,10 +1031,10 @@ 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(
@@ -1066,18 +1056,18 @@ 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";
 }
 
@@ -1091,16 +1081,16 @@ 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";
 }
 
@@ -1240,7 +1230,7 @@ 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);
   }
 }
@@ -216,10 +216,10 @@ gd::String ExpressionCodeGenerator::GenerateFreeFunctionCode(
     const std::vector<std::unique_ptr<ExpressionNode>>& parameters,
     const ExpressionMetadata& expressionMetadata) {
   codeGenerator.AddIncludeFiles(
-      expressionMetadata.codeExtraInformation.GetIncludeFiles());
+      expressionMetadata.GetIncludeFiles());
 
   // Launch custom code generator if needed
-  if (expressionMetadata.codeExtraInformation.HasCustomCodeGenerator()) {
+  if (expressionMetadata.HasCustomCodeGenerator()) {
     return expressionMetadata.codeExtraInformation.customCodeGenerator(
         PrintParameters(parameters), codeGenerator, context);
   }
@@ -242,10 +242,10 @@ gd::String ExpressionCodeGenerator::GenerateObjectFunctionCode(
       codeGenerator.GetObjectsAndGroups();
 
   codeGenerator.AddIncludeFiles(
-      expressionMetadata.codeExtraInformation.GetIncludeFiles());
+      expressionMetadata.GetIncludeFiles());
 
   // Launch custom code generator if needed
-  if (expressionMetadata.codeExtraInformation.HasCustomCodeGenerator()) {
+  if (expressionMetadata.HasCustomCodeGenerator()) {
     return expressionMetadata.codeExtraInformation.customCodeGenerator(
         PrintParameters(parameters), codeGenerator, context);
   }
@@ -270,11 +270,6 @@ gd::String ExpressionCodeGenerator::GenerateObjectFunctionCode(
     const ObjectMetadata& objInfo = MetadataProvider::GetObjectMetadata(
         codeGenerator.GetPlatform(), objectType);
 
-    if (objInfo.IsUnsupportedBaseObjectCapability(
-            expressionMetadata.GetRequiredBaseObjectCapability())) {
-      // Do nothing, skipping objects not supporting the capability required by
-      // this expression.
-    } else {
       codeGenerator.AddIncludeFiles(objInfo.includeFiles);
       functionOutput = codeGenerator.GenerateObjectFunctionCall(
           realObjects[i],
@@ -283,7 +278,6 @@ gd::String ExpressionCodeGenerator::GenerateObjectFunctionCode(
           parametersCode,
           functionOutput,
           context);
-    }
   }
 
   return functionOutput;
@@ -300,10 +294,10 @@ gd::String ExpressionCodeGenerator::GenerateBehaviorFunctionCode(
       codeGenerator.GetObjectsAndGroups();
 
   codeGenerator.AddIncludeFiles(
-      expressionMetadata.codeExtraInformation.GetIncludeFiles());
+      expressionMetadata.GetIncludeFiles());
 
   // Launch custom code generator if needed
-  if (expressionMetadata.codeExtraInformation.HasCustomCodeGenerator()) {
+  if (expressionMetadata.HasCustomCodeGenerator()) {
     return expressionMetadata.codeExtraInformation.customCodeGenerator(
         PrintParameters(parameters), codeGenerator, context);
   }

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
@@ -277,6 +282,14 @@ class GD_CORE_API BaseEvent {
    */
   bool IsFolded() const { return folded; }
 
+  /**
+   * \brief Return a list of all objects linked to the event.
+   */
+  virtual std::vector<gd::Expression*> GetAllObjectExpressions() {
+    std::vector<gd::Expression*> allObjectExpressions;
+    return allObjectExpressions;
+  }
+
   ///@}
 
   std::weak_ptr<gd::BaseEvent>

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/Parsers/ExpressionParser2.cpp

@@ -19,8 +19,10 @@
 #include "GDCore/Project/Project.h"
 #include "GDCore/Tools/Localization.h"
 #include "GDCore/Tools/MakeUnique.h"
+#include "GrammarTerminals.h"
 
 using namespace std;
+using namespace gd::GrammarTerminals;
 
 namespace gd {
 

Core/GDCore/Events/Parsers/ExpressionParser2.h

@@ -18,6 +18,7 @@
 #include "GDCore/String.h"
 #include "GDCore/Tools/Localization.h"
 #include "GDCore/Tools/MakeUnique.h"
+#include "GrammarTerminals.h"
 namespace gd {
 class Expression;
 class ObjectsContainer;
@@ -28,6 +29,8 @@ class ExpressionMetadata;
 
 namespace gd {
 
+using namespace gd::GrammarTerminals;
+
 /** \brief Parse an expression, returning a tree of node corresponding
  * to the parsed expression.
  *
@@ -211,7 +214,7 @@ class GD_CORE_API ExpressionParser2 {
       }
       SkipIfChar(IsClosingParenthesis);
       return factor;
-    } else if (IsIdentifierAllowedChar()) {
+    } else if (CheckIfChar(IsAllowedInIdentifier)) {
       return Identifier();
     }
 
@@ -606,95 +609,6 @@ class GD_CORE_API ExpressionParser2 {
     return predicate(character);
   }
 
-  bool IsIdentifierAllowedChar() {
-    if (currentPosition >= expression.size()) return false;
-    gd::String::value_type character = expression[currentPosition];
-
-    // Quickly compare if the character is a number or ASCII character.
-    if ((character >= '0' && character <= '9') ||
-        (character >= 'A' && character <= 'Z') ||
-        (character >= 'a' && character <= 'z'))
-      return true;
-
-    // Otherwise do the full check against separators forbidden in identifiers.
-    if (!IsParameterSeparator(character) && !IsDot(character) &&
-        !IsQuote(character) && !IsBracket(character) &&
-        !IsExpressionOperator(character) && !IsTermOperator(character)) {
-      return true;
-    }
-
-    return false;
-  }
-
-  static bool IsWhitespace(gd::String::value_type character) {
-    return character == ' ' || character == '\n' || character == '\r';
-  }
-
-  static bool IsParameterSeparator(gd::String::value_type character) {
-    return character == ',';
-  }
-
-  static bool IsDot(gd::String::value_type character) {
-    return character == '.';
-  }
-
-  static bool IsQuote(gd::String::value_type character) {
-    return character == '"';
-  }
-
-  static bool IsBracket(gd::String::value_type character) {
-    return character == '(' || character == ')' || character == '[' ||
-           character == ']' || character == '{' || character == '}';
-  }
-
-  static bool IsOpeningParenthesis(gd::String::value_type character) {
-    return character == '(';
-  }
-
-  static bool IsClosingParenthesis(gd::String::value_type character) {
-    return character == ')';
-  }
-
-  static bool IsOpeningSquareBracket(gd::String::value_type character) {
-    return character == '[';
-  }
-
-  static bool IsClosingSquareBracket(gd::String::value_type character) {
-    return character == ']';
-  }
-
-  static bool IsExpressionEndingChar(gd::String::value_type character) {
-    return character == ',' || IsClosingParenthesis(character) ||
-           IsClosingSquareBracket(character);
-  }
-
-  static bool IsExpressionOperator(gd::String::value_type character) {
-    return character == '+' || character == '-' || character == '<' ||
-           character == '>' || character == '?' || character == '^' ||
-           character == '=' || character == '\\' || character == ':' ||
-           character == '!';
-  }
-
-  static bool IsUnaryOperator(gd::String::value_type character) {
-    return character == '+' || character == '-';
-  }
-
-  static bool IsTermOperator(gd::String::value_type character) {
-    return character == '/' || character == '*';
-  }
-
-  static bool IsNumberFirstChar(gd::String::value_type character) {
-    return character == '.' || (character >= '0' && character <= '9');
-  }
-
-  static bool IsNonZeroDigit(gd::String::value_type character) {
-    return (character >= '1' && character <= '9');
-  }
-
-  static bool IsZeroDigit(gd::String::value_type character) {
-    return character == '0';
-  }
-
   bool IsNamespaceSeparator() {
     // Namespace separator is a special kind of delimiter as it is 2 characters
     // long
@@ -715,7 +629,7 @@ class GD_CORE_API ExpressionParser2 {
     gd::String name;
     size_t startPosition = currentPosition;
     while (currentPosition < expression.size() &&
-           (IsIdentifierAllowedChar()
+           (CheckIfChar(IsAllowedInIdentifier)
             // Allow whitespace in identifier name for compatibility
             || expression[currentPosition] == ' ')) {
       name += expression[currentPosition];

Core/GDCore/Events/Parsers/GrammarTerminals.h

@@ -0,0 +1,107 @@
+#pragma once
+#include "GDCore/String.h"
+
+namespace gd {
+
+/**
+ * Contains functions to handle the grammar of the expressions accepted by GDevelop.
+ */
+namespace GrammarTerminals {
+
+inline bool IsWhitespace(gd::String::value_type character) {
+  return character == ' ' || character == '\n' || character == '\r';
+}
+
+inline bool IsParameterSeparator(gd::String::value_type character) {
+  return character == ',';
+}
+
+inline bool IsDot(gd::String::value_type character) { return character == '.'; }
+
+inline bool IsQuote(gd::String::value_type character) {
+  return character == '"';
+}
+
+inline bool IsBracket(gd::String::value_type character) {
+  return character == '(' || character == ')' || character == '[' ||
+         character == ']' || character == '{' || character == '}';
+}
+
+inline bool IsOpeningParenthesis(gd::String::value_type character) {
+  return character == '(';
+}
+
+inline bool IsClosingParenthesis(gd::String::value_type character) {
+  return character == ')';
+}
+
+inline bool IsOpeningSquareBracket(gd::String::value_type character) {
+  return character == '[';
+}
+
+inline bool IsClosingSquareBracket(gd::String::value_type character) {
+  return character == ']';
+}
+
+inline bool IsExpressionEndingChar(gd::String::value_type character) {
+  return character == ',' || IsClosingParenthesis(character) ||
+         IsClosingSquareBracket(character);
+}
+
+inline bool IsExpressionOperator(gd::String::value_type character) {
+  return character == '+' || character == '-' || character == '<' ||
+         character == '>' || character == '?' || character == '^' ||
+         character == '=' || character == '\\' || character == ':' ||
+         character == '!';
+}
+
+inline bool IsUnaryOperator(gd::String::value_type character) {
+  return character == '+' || character == '-';
+}
+
+inline bool IsTermOperator(gd::String::value_type character) {
+  return character == '/' || character == '*';
+}
+
+inline bool IsNumberFirstChar(gd::String::value_type character) {
+  return character == '.' || (character >= '0' && character <= '9');
+}
+
+inline bool IsNonZeroDigit(gd::String::value_type character) {
+  return (character >= '1' && character <= '9');
+}
+
+inline bool IsZeroDigit(gd::String::value_type character) {
+  return character == '0';
+}
+
+/**
+ * Check if the given character can be used in an identifier. This is
+ * any unicode character, except for:
+ * `, . " () [] {} + - < > ? ^ = \ : ! / *` and whitespaces (space, line break, carriage return).
+ *
+ * This is loosely based on what is allowed in languages like JavaScript
+ * (see https://mathiasbynens.be/notes/javascript-properties), without support
+ * for unicode escape syntax, and allowing all unicode ranges. The only
+ * disallowed characters are the one used for the grammar.
+ */
+inline bool IsAllowedInIdentifier(gd::String::value_type character) {
+  // Quickly compare if the character is a number or ASCII character.
+  if ((character >= '0' && character <= '9') ||
+      (character >= 'A' && character <= 'Z') ||
+      (character >= 'a' && character <= 'z'))
+    return true;
+
+  // Otherwise do the full check against separators forbidden in identifiers.
+  if (!IsParameterSeparator(character) && !IsDot(character) &&
+      !IsQuote(character) && !IsBracket(character) &&
+      !IsExpressionOperator(character) && !IsTermOperator(character) &&
+      !IsWhitespace(character)) {
+    return true;
+  }
+
+  return false;
+}
+
+}  // namespace GrammarTerminals
+}  // namespace gd

Core/GDCore/Events/Tools/EventsCodeNameMangler.cpp

@@ -17,7 +17,7 @@ const gd::String& EventsCodeNameMangler::GetMangledObjectsListName(
     return it->second;
   }
 
-  gd::String partiallyMangledName = originalObjectName;
+  gd::String partiallyMangledName = GetMangledNameWithForbiddenUnderscore(originalObjectName);
   static const gd::String allowedCharacters =
       "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
 
@@ -43,7 +43,15 @@ const gd::String& EventsCodeNameMangler::GetExternalEventsFunctionMangledName(
     return it->second;
   }
 
-  gd::String partiallyMangledName = externalEventsName;
+  gd::String partiallyMangledName = GetMangledNameWithForbiddenUnderscore(externalEventsName);
+
+  mangledExternalEventsNames[externalEventsName] = "GDExternalEvents" + partiallyMangledName;
+  return mangledExternalEventsNames[externalEventsName];
+}
+
+gd::String EventsCodeNameMangler::GetMangledNameWithForbiddenUnderscore(
+    const gd::String &name) {
+  gd::String partiallyMangledName = name;
   static const gd::String allowedCharacters =
       "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
 
@@ -57,11 +65,30 @@ const gd::String& EventsCodeNameMangler::GetExternalEventsFunctionMangledName(
       partiallyMangledName.replace(i, 1, "_" + gd::String::From(unallowedChar));
     }
   }
-
-  mangledExternalEventsNames[externalEventsName] = "GDExternalEvents" + partiallyMangledName;
-  return mangledExternalEventsNames[externalEventsName];
+  return partiallyMangledName;
 }
 
+gd::String EventsCodeNameMangler::GetMangledName(
+    const gd::String &name) {
+  gd::String partiallyMangledName = name;
+  static const gd::String allowedCharacters =
+      "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_";
+
+  for (size_t i = 0; i < partiallyMangledName.size();
+       ++i)  // Replace all unallowed letter by an underscore and the ascii
+             // number of the letter
+  {
+    if (allowedCharacters.find_first_of(
+            std::u32string(1, partiallyMangledName[i])) == gd::String::npos) {
+      char32_t unallowedChar = partiallyMangledName[i];
+      partiallyMangledName.replace(i, 1, "_" + gd::String::From(unallowedChar));
+    }
+  }
+  return partiallyMangledName;
+}
+
+
+
 const gd::String& ManObjListName(const gd::String &objectName) {
   return EventsCodeNameMangler::Get()->GetMangledObjectsListName(objectName);
 }

Core/GDCore/Events/Tools/EventsCodeNameMangler.h

@@ -36,6 +36,8 @@ class GD_CORE_API EventsCodeNameMangler {
   const gd::String &GetExternalEventsFunctionMangledName(
       const gd::String &externalEventsName);
 
+  static gd::String GetMangledName(const gd::String &name);
+
   static EventsCodeNameMangler *Get();
   static void DestroySingleton();
 
@@ -44,6 +46,9 @@ class GD_CORE_API EventsCodeNameMangler {
   virtual ~EventsCodeNameMangler(){};
   static EventsCodeNameMangler *_singleton;
 
+  // This method is inlined to avoid to copy the returned string.
+  static inline gd::String GetMangledNameWithForbiddenUnderscore(const gd::String &name);
+
   std::unordered_map<gd::String, gd::String>
       mangledObjectNames;  ///< Memoized results of mangling for objects
   std::unordered_map<gd::String, gd::String>

Core/GDCore/Extensions/Builtin/AdvancedExtension.cpp

@@ -33,7 +33,7 @@ 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();
 
@@ -48,7 +48,7 @@ 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();
 
@@ -62,7 +62,37 @@ 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();
 
@@ -77,7 +107,7 @@ 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();
 
@@ -88,7 +118,7 @@ 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
@@ -98,7 +128,7 @@ 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
@@ -110,7 +140,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAdvancedExtension(
           "",
           "res/function32.png",
           "res/function16.png")
-      .AddParameter("functionParameterName", "Parameter name")
+      .AddParameter("functionParameterName", _("Parameter name"), "number,string,boolean")
       .UseStandardRelationalOperatorParameters(
           "number", gd::ParameterOptions::MakeNewOptions())
       .SetRelevantForFunctionEventsOnly();
@@ -124,7 +154,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAdvancedExtension(
           "",
           "res/function32.png",
           "res/function16.png")
-      .AddParameter("functionParameterName", "Parameter name")
+      .AddParameter("functionParameterName", _("Parameter name"), "number,string,boolean")
       .UseStandardRelationalOperatorParameters(
           "string", gd::ParameterOptions::MakeNewOptions())
       .SetRelevantForFunctionEventsOnly();

Core/GDCore/Extensions/Builtin/AllBuiltinExtensions.h

@@ -43,6 +43,12 @@ class GD_CORE_API BuiltinExtensionsImplementer {
   static void ImplementsVariablesExtension(gd::PlatformExtension& extension);
   static void ImplementsWindowExtension(gd::PlatformExtension& extension);
   static void ImplementsAsyncExtension(gd::PlatformExtension& extension);
+  static void ImplementsResizableExtension(gd::PlatformExtension& extension);
+  static void ImplementsScalableExtension(gd::PlatformExtension& extension);
+  static void ImplementsFlippableExtension(gd::PlatformExtension& extension);
+  static void ImplementsAnimatableExtension(gd::PlatformExtension& extension);
+  static void ImplementsEffectExtension(gd::PlatformExtension& extension);
+  static void ImplementsOpacityExtension(gd::PlatformExtension& extension);
 };
 
 }  // namespace gd

Core/GDCore/Extensions/Builtin/BaseObjectExtension.cpp

@@ -29,8 +29,16 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .SetIcon("res/actions/force24.png");
   extension.AddInstructionOrExpressionGroupMetadata(_("Variables"))
       .SetIcon("res/conditions/var24.png");
+  extension.AddInstructionOrExpressionGroupMetadata(_("Timers"))
+      .SetIcon("res/actions/timer24.png");
+  extension.AddInstructionOrExpressionGroupMetadata(_("Visibility"))
+      .SetIcon("res/actions/visibilite24.png");
   extension.AddInstructionOrExpressionGroupMetadata(_("Position"))
       .SetIcon("res/actions/position24_black.png");
+  extension.AddInstructionOrExpressionGroupMetadata(_("Angle"))
+      .SetIcon("res/actions/direction24_black.png");
+  extension.AddInstructionOrExpressionGroupMetadata(_("Size"))
+      .SetIcon("res/actions/scale24_black.png");
 
   gd::ObjectMetadata& obj = extension.AddObject<gd::ObjectConfiguration>(
       "", _("Base object"), _("Base object"), "res/objeticon24.png");
@@ -1101,6 +1109,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                     "res/actions/scaleWidth_black.png")
       .AddParameter("object", _("Object"));
 
+  // Deprecated
   obj.AddExpression("Largeur",
                     _("Width"),
                     _("Width of the object"),
@@ -1116,6 +1125,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
                     "res/actions/scaleHeight_black.png")
       .AddParameter("object", _("Object"));
 
+  // Deprecated
   obj.AddExpression("Hauteur",
                     _("Height"),
                     _("Height of the object"),
@@ -1201,7 +1211,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
   obj.AddExpression("ObjectTimerElapsedTime",
                     _("Object timer value"),
                     _("Value of an object timer"),
-                    _("Object timers"),
+                    _("Timers"),
                     "res/actions/time.png")
       .AddParameter("object", _("Object"))
       .AddParameter("identifier", _("Timer's name"), "objectTimer");
@@ -1251,6 +1261,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .AddParameter("expression", _("Target X position"))
       .AddParameter("expression", _("Target Y position"));
 
+  // Deprecated
   obj.AddAction("EnableEffect",
                 _("Enable an object effect"),
                 _("Enable an effect on the object"),
@@ -1262,8 +1273,9 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .AddParameter("objectEffectName", _("Effect name"))
       .AddParameter("yesorno", _("Enable?"))
       .MarkAsSimple()
-      .SetRequiresBaseObjectCapability("effect");
+      .SetHidden();
 
+  // Deprecated
   obj.AddAction("SetEffectDoubleParameter",
                 _("Effect parameter (number)"),
                 _("Change the value of a parameter of an effect.") + "\n" +
@@ -1278,8 +1290,9 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .AddParameter("objectEffectParameterName", _("Parameter name"))
       .AddParameter("expression", _("New value"))
       .MarkAsSimple()
-      .SetRequiresBaseObjectCapability("effect");
+      .SetHidden();
 
+  // Deprecated
   obj.AddAction("SetEffectStringParameter",
                 _("Effect parameter (string)"),
                 _("Change the value (string) of a parameter of an effect.") +
@@ -1295,8 +1308,9 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .AddParameter("objectEffectParameterName", _("Parameter name"))
       .AddParameter("string", _("New value"))
       .MarkAsSimple()
-      .SetRequiresBaseObjectCapability("effect");
+      .SetHidden();
 
+  // Deprecated
   obj.AddAction("SetEffectBooleanParameter",
                 _("Effect parameter (enable or disable)"),
                 _("Enable or disable a parameter of an effect.") + "\n" +
@@ -1311,8 +1325,9 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .AddParameter("objectEffectParameterName", _("Parameter name"))
       .AddParameter("yesorno", _("Enable?"))
       .MarkAsSimple()
-      .SetRequiresBaseObjectCapability("effect");
+      .SetHidden();
 
+  // Deprecated
   obj.AddCondition("IsEffectEnabled",
                    _("Effect is enabled"),
                    _("Check if the effect on an object is enabled."),
@@ -1323,7 +1338,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
       .AddParameter("object", _("Object"))
       .AddParameter("objectEffectName", _("Effect name"))
       .MarkAsSimple()
-      .SetRequiresBaseObjectCapability("effect");
+      .SetHidden();
 
   obj.AddAction("SetIncludedInParentCollisionMask",
                 _("Include in parent collision mask"),
@@ -1349,7 +1364,7 @@ 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();
 
@@ -1374,7 +1389,7 @@ 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();
 
@@ -1404,7 +1419,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
           _("Objects"),
           "res/actions/ajouthasard24.png",
           "res/actions/ajouthasard.png")
-      .AddCodeOnlyParameter("currentScene", "")
+      .AddCodeOnlyParameter("objectsContext", "")
       .AddParameter("objectList", _("Object"))
       .MarkAsSimple();
 
@@ -1463,7 +1478,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
           _("Objects"),
           "res/conditions/add24.png",
           "res/conditions/add.png")
-      .AddCodeOnlyParameter("currentScene", "")
+      .AddCodeOnlyParameter("objectsContext", "")
       .AddParameter("objectList", _("Object"))
       .MarkAsAdvanced();
 
@@ -1478,7 +1493,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsBaseObjectExtension(
           _("Objects"),
           "res/conditions/ajouthasard24.png",
           "res/conditions/ajouthasard.png")
-      .AddCodeOnlyParameter("currentScene", "")
+      .AddCodeOnlyParameter("objectsContext", "")
       .AddParameter("objectList", _("Object"))
       .MarkAsSimple();
 
@@ -1588,7 +1603,7 @@ 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."),
@@ -1619,7 +1634,7 @@ 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."),

Core/GDCore/Extensions/Builtin/CameraExtension.cpp

@@ -40,7 +40,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
           "res/conditions/camera24.png")
       .AddCodeOnlyParameter("currentScene", "")
       .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number (default : 0)"), "", true)
       .SetDefaultValue("0")
@@ -72,7 +72,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
           "res/conditions/camera24.png")
       .AddCodeOnlyParameter("currentScene", "")
       .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number (default : 0)"), "", true)
       .SetDefaultValue("0")
@@ -103,7 +103,7 @@ 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", ParameterOptions::MakeNewOptions())
@@ -119,7 +119,7 @@ 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", ParameterOptions::MakeNewOptions())
@@ -136,7 +136,7 @@ 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", ParameterOptions::MakeNewOptions())
@@ -153,7 +153,7 @@ 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", ParameterOptions::MakeNewOptions())
@@ -170,7 +170,7 @@ 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", ParameterOptions::MakeNewOptions())
@@ -187,7 +187,7 @@ 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", ParameterOptions::MakeNewOptions())
@@ -204,7 +204,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
           "res/conditions/camera24.png")
       .AddCodeOnlyParameter("currentScene", "")
       .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number (default : 0)"), "", true)
       .SetDefaultValue("0")
@@ -322,7 +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");
@@ -354,46 +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",
@@ -401,7 +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")
@@ -458,7 +453,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
           "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"))
@@ -477,7 +472,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
           "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"))
@@ -496,7 +491,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
           "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"))
@@ -512,7 +507,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                     "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();
@@ -526,7 +521,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                  "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)
@@ -542,7 +537,7 @@ 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",
@@ -560,7 +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...)"));
@@ -575,7 +570,7 @@ 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", gd::ParameterOptions::MakeNewOptions())
@@ -592,7 +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"));
 
@@ -607,7 +602,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
           "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/Capabilities/AnimatableExtension.cpp

@@ -0,0 +1,135 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the GNU Lesser General Public
+ * License.
+ */
+#include "GDCore/Extensions/Builtin/AllBuiltinExtensions.h"
+#include "GDCore/Extensions/Metadata/MultipleInstructionMetadata.h"
+#include "GDCore/Project/Behavior.h"
+#include "GDCore/Project/BehaviorsSharedData.h"
+#include "GDCore/Project/Object.h"
+#include "GDCore/Tools/Localization.h"
+
+using namespace std;
+namespace gd {
+
+void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAnimatableExtension(
+    gd::PlatformExtension& extension) {
+  extension
+      .SetExtensionInformation("AnimatableCapability",
+                               _("Animatable capability"),
+                               _("Animate objects."),
+                               "Florian Rival",
+                               "Open source (MIT License)")
+      .SetExtensionHelpPath("/objects");
+  extension.AddInstructionOrExpressionGroupMetadata(_("Animations and images"))
+      .SetIcon("res/actions/animation24.png");
+
+  gd::BehaviorMetadata& aut = extension.AddBehavior(
+      "AnimatableBehavior",
+      _("Animatable capability"),
+      "Animation",
+      _("Animate objects."),
+      "",
+      "res/actions/animation24.png",
+      "AnimatableBehavior",
+      std::make_shared<gd::Behavior>(),
+      std::make_shared<gd::BehaviorsSharedData>())
+    .SetHidden();
+
+  aut.AddExpressionAndConditionAndAction(
+         "number",
+         "Index",
+         _("Animation (by number)"),
+         _("the number of the animation played by the object (the number from "
+           "the animations list)"),
+         _("the number of the animation"),
+         _("Animations and images"),
+         "res/actions/animation24.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("behavior", _("Behavior"), "AnimatableBehavior")
+      .UseStandardParameters(
+          "number", gd::ParameterOptions::MakeNewOptions().SetDescription(
+                        _("Animation index")))
+      .MarkAsSimple();
+
+  aut.AddExpressionAndConditionAndAction(
+         "string",
+         "Name",
+         _("Animation (by name)"),
+         _("the animation played by the object using the name of the "
+           "animation."),
+         _("the animation"),
+         _("Animations and images"),
+         "res/actions/animation24.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("behavior", _("Behavior"), "AnimatableBehavior")
+      .UseStandardParameters(
+          "objectAnimationName", gd::ParameterOptions::MakeNewOptions().SetDescription(
+                        _("Animation name")))
+      .MarkAsSimple();
+
+  aut.AddScopedAction("PauseAnimation",
+                _("Pause the animation"),
+                _("Pause the animation of the object"),
+                _("Pause the animation of _PARAM0_"),
+                _("Animations and images"),
+                "res/actions/animation24.png",
+                "res/actions/animation.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("behavior", _("Behavior"), "AnimatableBehavior")
+      .MarkAsSimple();
+
+  aut.AddScopedAction("PlayAnimation",
+                _("Resume the animation"),
+                _("Resume the animation of the object"),
+                _("Resume the animation of _PARAM0_"),
+                _("Animations and images"),
+                "res/actions/animation24.png",
+                "res/actions/animation.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("behavior", _("Behavior"), "AnimatableBehavior")
+      .MarkAsSimple();
+
+  aut.AddExpressionAndConditionAndAction(
+         "number",
+         "SpeedScale",
+         _("Animation speed scale"),
+         _("the animation speed scale (1 = the default speed, >1 = faster and "
+           "<1 = slower)"),
+         _("the animation speed scale"),
+         _("Animations and images"),
+         "res/actions/animation24.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("behavior", _("Behavior"), "AnimatableBehavior")
+      .UseStandardParameters(
+          "number", gd::ParameterOptions::MakeNewOptions().SetDescription(
+                        _("Speed scale")))
+      .MarkAsSimple();
+
+  aut.AddScopedCondition("IsAnimationPaused",
+                   _("Animation paused"),
+                   _("Check if the animation of an object is paused."),
+                   _("The animation of _PARAM0_ is paused"),
+                   _("Animations and images"),
+                   "res/conditions/animation24.png",
+                   "res/conditions/animation.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("behavior", _("Behavior"), "AnimatableBehavior")
+      .MarkAsSimple();
+
+  aut.AddScopedCondition("HasAnimationEnded",
+                   _("Animation finished"),
+                   _("Check if the animation being played by the Sprite object "
+                     "is finished."),
+                   _("The animation of _PARAM0_ is finished"),
+                   _("Animations and images"),
+                   "res/conditions/animation24.png",
+                   "res/conditions/animation.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("behavior", _("Behavior"), "AnimatableBehavior")
+      .MarkAsSimple();
+}
+
+}  // namespace gd

Core/GDCore/Extensions/Builtin/Capabilities/EffectExtension.cpp

@@ -0,0 +1,116 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the GNU Lesser General Public
+ * License.
+ */
+#include "GDCore/Extensions/Builtin/AllBuiltinExtensions.h"
+#include "GDCore/Extensions/Metadata/MultipleInstructionMetadata.h"
+#include "GDCore/Project/Behavior.h"
+#include "GDCore/Project/BehaviorsSharedData.h"
+#include "GDCore/Project/Object.h"
+#include "GDCore/Tools/Localization.h"
+
+using namespace std;
+namespace gd {
+
+void GD_CORE_API BuiltinExtensionsImplementer::ImplementsEffectExtension(
+    gd::PlatformExtension& extension) {
+  extension
+      .SetExtensionInformation("EffectCapability",
+                               _("Effect capability"),
+                               _("Apply visual effects to objects."),
+                               "Florian Rival",
+                               "Open source (MIT License)")
+      .SetExtensionHelpPath("/objects");
+  extension.AddInstructionOrExpressionGroupMetadata(_("Effects"))
+      .SetIcon("res/actions/effect24.png");
+
+  gd::BehaviorMetadata& aut = extension.AddBehavior(
+      "EffectBehavior",
+      _("Effect capability"),
+      "Effect",
+      _("Apply visual effects to objects."),
+      "",
+      "res/actions/effect24.png",
+      "EffectBehavior",
+      std::make_shared<gd::Behavior>(),
+      std::make_shared<gd::BehaviorsSharedData>())
+    .SetHidden();
+
+  aut.AddScopedAction("EnableEffect",
+                _("Enable an object effect"),
+                _("Enable an effect on the object"),
+                _("Enable effect _PARAM2_ on _PARAM0_: _PARAM3_"),
+                _("Effects"),
+                "res/actions/effect24.png",
+                "res/actions/effect.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("behavior", _("Behavior"), "EffectBehavior")
+      .AddParameter("objectEffectName", _("Effect name"))
+      .AddParameter("yesorno", _("Enable?"))
+      .MarkAsSimple();
+
+  aut.AddScopedAction("SetEffectDoubleParameter",
+                _("Effect parameter (number)"),
+                _("Change the value of a parameter of an effect.") + "\n" +
+                    _("You can find the parameter names (and change the effect "
+                      "names) in the effects window."),
+                _("Set _PARAM3_ to _PARAM4_ for effect _PARAM2_ of _PARAM0_"),
+                _("Effects"),
+                "res/actions/effect24.png",
+                "res/actions/effect.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("behavior", _("Behavior"), "EffectBehavior")
+      .AddParameter("objectEffectName", _("Effect name"))
+      .AddParameter("objectEffectParameterName", _("Parameter name"))
+      .AddParameter("expression", _("New value"))
+      .MarkAsSimple();
+
+  aut.AddScopedAction("SetEffectStringParameter",
+                _("Effect parameter (string)"),
+                _("Change the value (string) of a parameter of an effect.") +
+                    "\n" +
+                    _("You can find the parameter names (and change the effect "
+                      "names) in the effects window."),
+                _("Set _PARAM3_ to _PARAM4_ for effect _PARAM2_ of _PARAM0_"),
+                _("Effects"),
+                "res/actions/effect24.png",
+                "res/actions/effect.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("behavior", _("Behavior"), "EffectBehavior")
+      .AddParameter("objectEffectName", _("Effect name"))
+      .AddParameter("objectEffectParameterName", _("Parameter name"))
+      .AddParameter("string", _("New value"))
+      .MarkAsSimple();
+
+  aut.AddScopedAction("SetEffectBooleanParameter",
+                _("Effect parameter (enable or disable)"),
+                _("Enable or disable a parameter of an effect.") + "\n" +
+                    _("You can find the parameter names (and change the effect "
+                      "names) in the effects window."),
+                _("Enable _PARAM3_ for effect _PARAM2_ of _PARAM0_: _PARAM4_"),
+                _("Effects"),
+                "res/actions/effect24.png",
+                "res/actions/effect.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("behavior", _("Behavior"), "EffectBehavior")
+      .AddParameter("objectEffectName", _("Effect name"))
+      .AddParameter("objectEffectParameterName", _("Parameter name"))
+      .AddParameter("yesorno", _("Enable?"))
+      .MarkAsSimple();
+
+  aut.AddScopedCondition("IsEffectEnabled",
+                   _("Effect is enabled"),
+                   _("Check if the effect on an object is enabled."),
+                   _("Effect _PARAM2_ of _PARAM0_ is enabled"),
+                   _("Effects"),
+                   "res/actions/effect24.png",
+                   "res/actions/effect.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("behavior", _("Behavior"), "EffectBehavior")
+      .AddParameter("objectEffectName", _("Effect name"))
+      .MarkAsSimple();
+}
+
+}  // namespace gd

Core/GDCore/Extensions/Builtin/Capabilities/FlippableExtension.cpp

@@ -0,0 +1,86 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the GNU Lesser General Public
+ * License.
+ */
+#include "GDCore/Extensions/Builtin/AllBuiltinExtensions.h"
+#include "GDCore/Extensions/Metadata/MultipleInstructionMetadata.h"
+#include "GDCore/Project/Behavior.h"
+#include "GDCore/Project/BehaviorsSharedData.h"
+#include "GDCore/Project/Object.h"
+#include "GDCore/Tools/Localization.h"
+
+using namespace std;
+namespace gd {
+
+void GD_CORE_API BuiltinExtensionsImplementer::ImplementsFlippableExtension(
+    gd::PlatformExtension& extension) {
+  extension
+      .SetExtensionInformation("FlippableCapability",
+                               _("Flippable capability"),
+                               _("Flip objects."),
+                               "Florian Rival",
+                               "Open source (MIT License)")
+      .SetExtensionHelpPath("/objects");
+  extension.AddInstructionOrExpressionGroupMetadata(_("Effects"))
+      .SetIcon("res/actions/effect24.png");
+
+  gd::BehaviorMetadata& aut = extension.AddBehavior(
+      "FlippableBehavior",
+      _("Flippable capability"),
+      "Flippable",
+      _("Flip objects."),
+      "",
+      "res/actions/flipX24.png",
+      "FlippableBehavior",
+      std::make_shared<gd::Behavior>(),
+      std::make_shared<gd::BehaviorsSharedData>())
+    .SetHidden();
+
+  aut.AddScopedAction("FlipX",
+                _("Flip the object horizontally"),
+                _("Flip the object horizontally"),
+                _("Flip horizontally _PARAM0_: _PARAM2_"),
+                _("Effects"),
+                "res/actions/flipX24.png",
+                "res/actions/flipX.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("behavior", _("Behavior"), "FlippableBehavior")
+      .AddParameter("yesorno", _("Activate flipping"))
+      .MarkAsSimple();
+
+  aut.AddScopedAction("FlipY",
+                _("Flip the object vertically"),
+                _("Flip the object vertically"),
+                _("Flip vertically _PARAM0_: _PARAM2_"),
+                _("Effects"),
+                "res/actions/flipY24.png",
+                "res/actions/flipY.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("behavior", _("Behavior"), "FlippableBehavior")
+      .AddParameter("yesorno", _("Activate flipping"))
+      .MarkAsSimple();
+
+  aut.AddScopedCondition("FlippedX",
+                   _("Horizontally flipped"),
+                   _("Check if the object is horizontally flipped"),
+                   _("_PARAM0_ is horizontally flipped"),
+                   _("Effects"),
+                   "res/actions/flipX24.png",
+                   "res/actions/flipX.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("behavior", _("Behavior"), "FlippableBehavior");
+
+  aut.AddScopedCondition("FlippedY",
+                   _("Vertically flipped"),
+                   _("Check if the object is vertically flipped"),
+                   _("_PARAM0_ is vertically flipped"),
+                   _("Effects"),
+                   "res/actions/flipY24.png",
+                   "res/actions/flipY.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("behavior", _("Behavior"), "FlippableBehavior");
+}
+
+}  // namespace gd

Core/GDCore/Extensions/Builtin/Capabilities/OpacityExtension.cpp

@@ -0,0 +1,59 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the GNU Lesser General Public
+ * License.
+ */
+#include "GDCore/Extensions/Builtin/AllBuiltinExtensions.h"
+#include "GDCore/Extensions/Metadata/MultipleInstructionMetadata.h"
+#include "GDCore/Project/Behavior.h"
+#include "GDCore/Project/BehaviorsSharedData.h"
+#include "GDCore/Project/Object.h"
+#include "GDCore/Tools/Localization.h"
+
+using namespace std;
+namespace gd {
+
+void GD_CORE_API BuiltinExtensionsImplementer::ImplementsOpacityExtension(
+    gd::PlatformExtension& extension) {
+  extension
+      .SetExtensionInformation("OpacityCapability",
+                               _("Opacity capability"),
+                               _("Change the object opacity."),
+                               "Florian Rival",
+                               "Open source (MIT License)")
+      .SetExtensionHelpPath("/objects");
+  extension.AddInstructionOrExpressionGroupMetadata(_("Visibility"))
+      .SetIcon("res/actions/opacity24.png");
+
+  gd::BehaviorMetadata& aut = extension.AddBehavior(
+      "OpacityBehavior",
+      _("Opacity capability"),
+      "Opacity",
+      _("Change the object opacity."),
+      "",
+      "res/actions/opacity24.png",
+      "OpacityBehavior",
+      std::make_shared<gd::Behavior>(),
+      std::make_shared<gd::BehaviorsSharedData>())
+    .SetHidden();
+
+  aut.AddExpressionAndConditionAndAction(
+         "number",
+         "Value",
+         _("Opacity"),
+         _("the opacity of an object, between 0 (fully transparent) to 255 "
+           "(opaque)"),
+         _("the opacity"),
+         _("Visibility"),
+         "res/actions/opacity24.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("behavior", _("Behavior"), "OpacityBehavior")
+      .UseStandardParameters(
+          "number", gd::ParameterOptions::MakeNewOptions().SetDescription(
+                        _("Opacity (0-255)")))
+      .SetFunctionName("setOpacity")
+      .SetGetter("getOpacity");
+}
+
+}  // namespace gd

Core/GDCore/Extensions/Builtin/Capabilities/ResizableExtension.cpp

@@ -0,0 +1,112 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the GNU Lesser General Public
+ * License.
+ */
+#include "GDCore/Extensions/Builtin/AllBuiltinExtensions.h"
+#include "GDCore/Project/Behavior.h"
+#include "GDCore/Project/BehaviorsSharedData.h"
+#include "GDCore/Project/Object.h"
+#include "GDCore/Tools/Localization.h"
+
+using namespace std;
+namespace gd {
+
+void GD_CORE_API BuiltinExtensionsImplementer::ImplementsResizableExtension(
+    gd::PlatformExtension &extension) {
+  extension
+      .SetExtensionInformation("ResizableCapability",
+                               _("Resizable capability"),
+                               _("Change the object dimensions."),
+                               "Florian Rival",
+                               "Open source (MIT License)")
+      .SetExtensionHelpPath("/objects");
+  extension.AddInstructionOrExpressionGroupMetadata(_("Size")).SetIcon(
+      "res/actions/scale24_black.png");
+
+  gd::BehaviorMetadata &aut =
+      extension
+          .AddBehavior("ResizableBehavior",
+                       _("Resizable capability"),
+                       "Resizable",
+                       _("Change the object dimensions."),
+                       "",
+                       "res/actions/scale24_black.png",
+                       "ResizableBehavior",
+                       std::make_shared<gd::Behavior>(),
+                       std::make_shared<gd::BehaviorsSharedData>())
+          .SetHidden();
+
+  aut.AddScopedAction("SetWidth",
+                      _("Width"),
+                      _("Change the width of the object."),
+                      _("the width"),
+                      _("Size"),
+                      "res/actions/scaleWidth24_black.png",
+                      "res/actions/scaleWidth_black.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("behavior", _("Behavior"), "ResizableBehavior")
+      .UseStandardOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(_("Width")))
+      .MarkAsAdvanced();
+
+  aut.AddScopedCondition("Width",
+                         _("Width"),
+                         _("Compare the width of the object."),
+                         _("the width"),
+                         _("Size"),
+                         "res/conditions/scaleWidth24_black.png",
+                         "res/conditions/scaleWidth_black.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("behavior", _("Behavior"), "ResizableBehavior")
+      .UseStandardRelationalOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(_("Width")))
+      .MarkAsAdvanced();
+
+  aut.AddScopedAction("SetHeight",
+                      _("Height"),
+                      _("Change the height of the object."),
+                      _("the height"),
+                      _("Size"),
+                      "res/actions/scaleHeight24_black.png",
+                      "res/actions/scaleHeight_black.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("behavior", _("Behavior"), "ResizableBehavior")
+      .UseStandardOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(_("Height")))
+      .MarkAsAdvanced();
+
+  aut.AddScopedCondition("Height",
+                         _("Height"),
+                         _("Compare the height of the object."),
+                         _("the height"),
+                         _("Size"),
+                         "res/conditions/scaleHeight24_black.png",
+                         "res/conditions/scaleHeight_black.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("behavior", _("Behavior"), "ResizableBehavior")
+      .UseStandardRelationalOperatorParameters(
+          "number",
+          ParameterOptions::MakeNewOptions().SetDescription(_("Height")))
+      .MarkAsAdvanced();
+
+  aut.AddScopedAction(
+         "SetSize",
+         _("Size"),
+         _("Change the size of an object."),
+         _("Change the size of _PARAM0_: set to _PARAM2_ x _PARAM3_"),
+         _("Size"),
+         "res/actions/scale24_black.png",
+         "res/actions/scale_black.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("behavior", _("Behavior"), "ResizableBehavior")
+      .AddParameter("expression", _("Width"))
+      .AddParameter("expression", _("Height"))
+      .MarkAsAdvanced();
+}
+
+}  // namespace gd

Core/GDCore/Extensions/Builtin/Capabilities/ScalableExtension.cpp

@@ -0,0 +1,90 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the GNU Lesser General Public
+ * License.
+ */
+#include "GDCore/Extensions/Builtin/AllBuiltinExtensions.h"
+#include "GDCore/Extensions/Metadata/MultipleInstructionMetadata.h"
+#include "GDCore/Project/Behavior.h"
+#include "GDCore/Project/BehaviorsSharedData.h"
+#include "GDCore/Project/Object.h"
+#include "GDCore/Tools/Localization.h"
+
+using namespace std;
+namespace gd {
+
+void GD_CORE_API BuiltinExtensionsImplementer::ImplementsScalableExtension(
+    gd::PlatformExtension& extension) {
+  extension
+      .SetExtensionInformation("ScalableCapability",
+                               _("Scalable capability"),
+                               _("Change the object scale."),
+                               "Florian Rival",
+                               "Open source (MIT License)")
+      .SetExtensionHelpPath("/objects");
+  extension.AddInstructionOrExpressionGroupMetadata(_("Size"))
+      .SetIcon("res/actions/scale24_black.png");
+
+  gd::BehaviorMetadata& aut = extension.AddBehavior(
+      "ScalableBehavior",
+      _("Scalable capability"),
+      "Scale",
+      _("Change the object scale."),
+      "",
+      "res/actions/scale24_black.png",
+      "ResizableBehavior",
+      std::make_shared<gd::Behavior>(),
+      std::make_shared<gd::BehaviorsSharedData>())
+    .SetHidden();
+
+  aut.AddExpressionAndConditionAndAction(
+         "number",
+         "Value",
+         _("Scale"),
+         _("the scale of the object (default scale is 1)"),
+         _("the scale"),
+         _("Scale"),
+         "res/actions/scale24_black.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("behavior", _("Behavior"), "ScalableBehavior")
+      .UseStandardParameters(
+          "number",
+          gd::ParameterOptions::MakeNewOptions().SetDescription(
+              _("Scale (1 by default)")))
+      .MarkAsAdvanced();
+
+  aut.AddExpressionAndConditionAndAction(
+         "number",
+         "X",
+         _("Scale on X axis"),
+         _("the scale on X axis of the object (default scale is 1)"),
+         _("the scale on X axis"),
+         _("Scale"),
+         "res/actions/scale24_black.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("behavior", _("Behavior"), "ScalableBehavior")
+      .UseStandardParameters(
+          "number",
+          gd::ParameterOptions::MakeNewOptions().SetDescription(
+              _("Scale (1 by default)")))
+      .MarkAsAdvanced();
+
+  aut.AddExpressionAndConditionAndAction(
+         "number",
+         "Y",
+         _("Scale on Y axis"),
+         _("the scale on Y axis of the object (default scale is 1)"),
+         _("the scale on Y axis"),
+         _("Scale"),
+         "res/actions/scale24_black.png")
+      .AddParameter("object", _("Object"))
+      .AddParameter("behavior", _("Behavior"), "ScalableBehavior")
+      .UseStandardParameters(
+          "number",
+          gd::ParameterOptions::MakeNewOptions().SetDescription(
+              _("Scale (1 by default)")))
+      .MarkAsAdvanced();
+}
+
+}  // namespace gd

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/MouseExtension.cpp

@@ -163,7 +163,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsMouseExtension(
           "res/conditions/mouse24.png")
       .AddCodeOnlyParameter("currentScene", "")
       .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number (default : 0)"), "", true)
       .SetDefaultValue("0");
@@ -185,7 +185,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsMouseExtension(
           "res/conditions/mouse24.png")
       .AddCodeOnlyParameter("currentScene", "")
       .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number (default : 0)"), "", true)
       .SetDefaultValue("0");
@@ -206,7 +206,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsMouseExtension(
                                  "res/conditions/mouse24.png")
       .AddCodeOnlyParameter("currentScene", "")
       .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number (default : 0)"), "", true)
       .SetDefaultValue("0")
@@ -223,7 +223,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsMouseExtension(
                                  "res/conditions/mouse24.png")
       .AddCodeOnlyParameter("currentScene", "")
       .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number (default : 0)"), "", true)
       .SetDefaultValue("0")
@@ -317,7 +317,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsMouseExtension(
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("expression", _("Touch identifier"))
       .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number (default : 0)"), "", true)
       .SetDefaultValue("0");
@@ -333,7 +333,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsMouseExtension(
       .AddCodeOnlyParameter("currentScene", "")
       .AddParameter("expression", _("Touch identifier"))
       .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
-      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .AddParameter("layer", _("Layer"), "", true)
       .SetDefaultValue("\"\"")
       .AddParameter("expression", _("Camera number (default : 0)"), "", true)
       .SetDefaultValue("0");

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"),

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

@@ -110,11 +110,11 @@ void Direction::UnserializeFrom(const gd::SerializerElement& element) {
             .GetBoolAttribute("automatic", true));
 
     if (spriteElement.HasChild("CustomCollisionMask"))
-      sprite.SetCollisionMaskAutomatic(
+      sprite.SetFullImageCollisionMask(
           !spriteElement.GetChild("CustomCollisionMask")
                .GetBoolAttribute("custom", false));
     else
-      sprite.SetCollisionMaskAutomatic(
+      sprite.SetFullImageCollisionMask(
           !spriteElement.GetBoolAttribute("hasCustomCollisionMask", false));
 
     std::vector<Polygon2d> mask;
@@ -173,7 +173,7 @@ void SaveSpritesDirection(const vector<Sprite>& sprites,
         .SetAttribute("automatic", sprites[i].IsDefaultCenterPoint());
 
     spriteElement.SetAttribute("hasCustomCollisionMask",
-                               !sprites[i].IsCollisionMaskAutomatic());
+                               !sprites[i].IsFullImageCollisionMask());
 
     gd::SerializerElement& collisionMaskElement =
         spriteElement.AddChild("customCollisionMask");

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

@@ -4,7 +4,9 @@
  * reserved. This project is released under the MIT License.
  */
 #include "GDCore/Extensions/Builtin/SpriteExtension/Sprite.h"
+
 #include <iostream>
+
 #include "GDCore/Extensions/Builtin/SpriteExtension/Polygon2d.h"
 
 using namespace std;
@@ -14,11 +16,10 @@ namespace gd {
 Point Sprite::badPoint("");
 
 Sprite::Sprite()
-    : automaticCollisionMask(true),
+    : fullImageCollisionMask(false),
       origine("origine"),
       centre("centre"),
-      automaticCentre(true) {
-}
+      automaticCentre(true) {}
 
 Sprite::~Sprite(){};
 

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

@@ -7,6 +7,7 @@
 #ifndef SPRITE_H
 #define SPRITE_H
 #include <memory>
+
 #include "GDCore/Extensions/Builtin/SpriteExtension/Point.h"
 #include "GDCore/Extensions/Builtin/SpriteExtension/Polygon2d.h"
 #include "GDCore/String.h"
@@ -43,7 +44,7 @@ class GD_CORE_API Sprite {
 
   /**
    * \brief Get the collision mask (custom or automatically generated owing to
-   * IsCollisionMaskAutomatic())
+   * IsFullImageCollisionMask())
    *
    * \warning If the image has not been loaded ( using LoadImage ) and the
    * collision mask is set as automatic, the returned mask won't be correct.
@@ -66,7 +67,7 @@ class GD_CORE_API Sprite {
 
   /**
    * \brief Set the custom collision mask.
-   * Call then `SetCollisionMaskAutomatic(false)` to use it.
+   * Call then `SetFullImageCollisionMask(false)` to use it.
    */
   void SetCustomCollisionMask(const std::vector<Polygon2d>& collisionMask);
 
@@ -74,15 +75,15 @@ class GD_CORE_API Sprite {
    * \brief Return true if the collision mask is a bounding box, false if a
    * custom collision mask is used.
    */
-  inline bool IsCollisionMaskAutomatic() const {
-    return automaticCollisionMask;
+  inline bool IsFullImageCollisionMask() const {
+    return fullImageCollisionMask;
   }
 
   /**
    * \brief Un/set use of the custom collision mask.
    */
-  inline void SetCollisionMaskAutomatic(bool enabled) {
-    automaticCollisionMask = enabled;
+  inline void SetFullImageCollisionMask(bool enabled) {
+    fullImageCollisionMask = enabled;
   };
 
   /**
@@ -161,9 +162,9 @@ class GD_CORE_API Sprite {
  private:
   gd::String image;  ///< Name of the image to be loaded in Image Manager.
 
-  bool automaticCollisionMask;  ///< True to use the custom collision mask.
-                                ///< Otherwise, a basic bounding box is returned
-                                ///< by GetCollisionMask()
+  bool fullImageCollisionMask;  ///< True to use a bounding box wrapping the
+                                ///< whole image as collision mask. If false,
+                                ///< custom collision mask is used.
   std::vector<Polygon2d> customCollisionMask;  ///< Custom collision mask
 
   std::vector<Point> points;  ///< List of the points used by the sprite

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

@@ -2,7 +2,7 @@
  * GDevelop Core
  * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
  * reserved. This project is released under the GNU Lesser General Public
- * LicenFse.
+ * License.
  */
 #include "GDCore/Extensions/Builtin/AllBuiltinExtensions.h"
 #include "GDCore/Extensions/Builtin/SpriteExtension/SpriteObject.h"
@@ -32,8 +32,15 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                                    _("Animated object which can be used for "
                                      "most elements of a game"),
                                    "CppPlatform/Extensions/spriteicon.png")
-          .SetCategoryFullName(_("General"));
+          .SetCategoryFullName(_("General"))
+          .AddDefaultBehavior("EffectCapability::EffectBehavior")
+          .AddDefaultBehavior("ResizableCapability::ResizableBehavior")
+          .AddDefaultBehavior("ScalableCapability::ScalableBehavior")
+          .AddDefaultBehavior("FlippableCapability::FlippableBehavior")
+          .AddDefaultBehavior("OpacityCapability::OpacityBehavior")
+          .AddDefaultBehavior("AnimatableCapability::AnimatableBehavior");
 
+  // Deprecated
   obj.AddAction("Opacity",
                 _("Sprite opacity"),
                 _("Change the opacity of a Sprite. 0 is fully transparent, 255 "
@@ -48,8 +55,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
           "number",
           ParameterOptions::MakeNewOptions().SetDescription(
               _("Opacity (0-255)")))
-      .MarkAsSimple();
+      .MarkAsSimple()
+      .SetHidden();
 
+  // Deprecated
   obj.AddAction("ChangeAnimation",
                 _("Change the animation"),
                 _("Change the animation of the object, using the animation "
@@ -62,8 +71,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
       .AddParameter("object", _("Object"), "Sprite")
       .UseStandardOperatorParameters("number",
                                      ParameterOptions::MakeNewOptions())
+      .SetHidden()
       .MarkAsSimple();
 
+  // Deprecated
   obj.AddAction("SetAnimationName",
                 _("Change the animation (by name)"),
                 _("Change the animation of the object, using the name of the "
@@ -75,6 +86,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
 
       .AddParameter("object", _("Object"), "Sprite")
       .AddParameter("objectAnimationName", _("Animation name"))
+      .SetHidden()
       .MarkAsAdvanced();
 
   obj.AddAction(
@@ -107,6 +119,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                                      ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
+  // Deprecated
   obj.AddAction("PauseAnimation",
                 _("Pause the animation"),
                 _("Pause the animation of the object"),
@@ -116,8 +129,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                 "res/actions/animation.png")
 
       .AddParameter("object", _("Object"), "Sprite")
+      .SetHidden()
       .MarkAsSimple();
 
+  // Deprecated
   obj.AddAction("PlayAnimation",
                 _("Play the animation"),
                 _("Play the animation of the object"),
@@ -127,8 +142,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                 "res/actions/animation.png")
 
       .AddParameter("object", _("Object"), "Sprite")
+      .SetHidden()
       .MarkAsSimple();
 
+  // Deprecated
   obj.AddAction(
          "ChangeAnimationSpeedScale",
          _("Animation speed scale"),
@@ -143,8 +160,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
       .UseStandardOperatorParameters(
           "number",
           ParameterOptions::MakeNewOptions().SetDescription(_("Speed scale")))
+      .SetHidden()
       .MarkAsSimple();
 
+  // Deprecated
   obj.AddAction("TourneVersPos",
                 "Rotate an object toward a position",
                 "Rotate an object towards a position.",
@@ -159,8 +178,9 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
       .AddParameter("expression", _("Angular speed (degrees per second)"))
       .SetDefaultValue("0")
       .AddCodeOnlyParameter("currentScene", "")
-      .SetHidden();  // Deprecated
+      .SetHidden();
 
+  // Deprecated
   obj.AddAction("ChangeScale",
                 _("Scale"),
                 _("Modify the scale of the specified object."),
@@ -174,8 +194,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
           "number",
           ParameterOptions::MakeNewOptions().SetDescription(
               _("Scale (1 by default)")))
-      .MarkAsAdvanced();
+      .MarkAsAdvanced()
+      .SetHidden();
 
+  // Deprecated
   obj.AddAction("ChangeScaleWidth",
                 _("Scale on X axis"),
                 _("Modify the scale of the width of an object."),
@@ -189,8 +211,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
           "number",
           ParameterOptions::MakeNewOptions().SetDescription(
               _("Scale (1 by default)")))
-      .MarkAsAdvanced();
+      .MarkAsAdvanced()
+      .SetHidden();
 
+  // Deprecated
   obj.AddAction("ChangeScaleHeight",
                 _("Scale on Y axis"),
                 _("Modify the scale of the height of an object."),
@@ -204,8 +228,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
           "number",
           ParameterOptions::MakeNewOptions().SetDescription(
               _("Scale (1 by default)")))
-      .MarkAsAdvanced();
+      .MarkAsAdvanced()
+      .SetHidden();
 
+  // Deprecated
   obj.AddAction("ChangeWidth",
                 _("Width"),
                 _("Change the width of a Sprite object."),
@@ -217,8 +243,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
       .AddParameter("object", _("Object"), "Sprite")
       .UseStandardOperatorParameters("number",
                                      ParameterOptions::MakeNewOptions())
-      .MarkAsAdvanced();
+      .MarkAsAdvanced()
+      .SetHidden();
 
+  // Deprecated
   obj.AddCondition("Width",
                    _("Width"),
                    _("Compare the width of a Sprite object."),
@@ -230,8 +258,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
       .AddParameter("object", _("Object"), "Sprite")
       .UseStandardRelationalOperatorParameters(
           "number", ParameterOptions::MakeNewOptions())
-      .MarkAsAdvanced();
+      .MarkAsAdvanced()
+      .SetHidden();
 
+  // Deprecated
   obj.AddAction("ChangeHeight",
                 _("Height"),
                 _("Change the height of a Sprite object."),
@@ -243,8 +273,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
       .AddParameter("object", _("Object"), "Sprite")
       .UseStandardOperatorParameters("number",
                                      ParameterOptions::MakeNewOptions())
-      .MarkAsAdvanced();
+      .MarkAsAdvanced()
+      .SetHidden();
 
+  // Deprecated
   obj.AddCondition("Height",
                    _("Height"),
                    _("Compare the height of a Sprite object."),
@@ -256,8 +288,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
       .AddParameter("object", _("Object"), "Sprite")
       .UseStandardRelationalOperatorParameters(
           "number", ParameterOptions::MakeNewOptions())
-      .MarkAsAdvanced();
+      .MarkAsAdvanced()
+      .SetHidden();
 
+  // Deprecated
   obj.AddAction("SetSize",
                 _("Size"),
                 _("Change the size of an object."),
@@ -269,8 +303,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
       .AddParameter("object", _("Object"))
       .AddParameter("expression", _("Width"))
       .AddParameter("expression", _("Height"))
-      .MarkAsAdvanced();
+      .MarkAsAdvanced()
+      .SetHidden();
 
+  // Deprecated
   obj.AddCondition(
          "Animation",
          _("Current animation"),
@@ -283,11 +319,13 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
       .AddParameter("object", _("Object"), "Sprite")
       .UseStandardRelationalOperatorParameters(
           "number", ParameterOptions::MakeNewOptions())
+      .SetHidden()
       .MarkAsAdvanced();
 
+  // Deprecated
   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",
@@ -295,6 +333,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
 
       .AddParameter("object", _("Object"), "Sprite")
       .AddParameter("objectAnimationName", _("Animation name"))
+      .SetHidden()
       .MarkAsAdvanced();
 
   obj.AddCondition(
@@ -328,6 +367,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
           "number", ParameterOptions::MakeNewOptions())
       .MarkAsAdvanced();
 
+  // Deprecated
   obj.AddCondition("AnimStopped",
                    _("Animation paused"),
                    _("Check if the animation of an object is paused."),
@@ -337,8 +377,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                    "res/conditions/animation.png")
 
       .AddParameter("object", _("Object"), "Sprite")
+      .SetHidden()
       .MarkAsSimple();
 
+  // Deprecated
   obj.AddCondition("AnimationEnded",
                    _("Animation finished"),
                    _("Check if the animation being played by the Sprite object "
@@ -352,6 +394,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
       .MarkAsSimple()
       .SetHidden();
 
+  // Deprecated
   obj.AddCondition("AnimationEnded2",
                    _("Animation finished"),
                    _("Check if the animation being played by the Sprite object "
@@ -362,6 +405,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                    "res/conditions/animation.png")
 
       .AddParameter("object", _("Object"), "Sprite")
+      .SetHidden()
       .MarkAsSimple();
 
   obj.AddCondition("ScaleWidth",
@@ -394,6 +438,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
               _("Scale (1 by default)")))
       .MarkAsAdvanced();
 
+  // Deprecated
   obj.AddCondition("Opacity",
                    _("Opacity"),
                    _("Compare the opacity of a Sprite, between 0 (fully "
@@ -408,7 +453,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
           "number",
           ParameterOptions::MakeNewOptions().SetDescription(
               _("Opacity to compare to (0-255)")))
-      .MarkAsSimple();
+      .MarkAsSimple()
+      .SetHidden();
 
   obj.AddCondition(
          "BlendMode",
@@ -456,9 +502,9 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                 _("Effects"),
                 "res/actions/flipX24.png",
                 "res/actions/flipX.png")
-
       .AddParameter("object", _("Object"), "Sprite")
       .AddParameter("yesorno", _("Activate flipping"))
+      .SetHidden()
       .MarkAsSimple();
 
   obj.AddAction("FlipY",
@@ -468,9 +514,9 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                 _("Effects"),
                 "res/actions/flipY24.png",
                 "res/actions/flipY.png")
-
       .AddParameter("object", _("Object"), "Sprite")
       .AddParameter("yesorno", _("Activate flipping"))
+      .SetHidden()
       .MarkAsSimple();
 
   obj.AddCondition("FlippedX",
@@ -480,8 +526,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                    _("Effects"),
                    "res/actions/flipX24.png",
                    "res/actions/flipX.png")
-
-      .AddParameter("object", _("Object"), "Sprite");
+      .AddParameter("object", _("Object"), "Sprite")
+      .SetHidden();
 
   obj.AddCondition("FlippedY",
                    _("Vertically flipped"),
@@ -490,9 +536,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                    _("Effects"),
                    "res/actions/flipY24.png",
                    "res/actions/flipY.png")
+      .AddParameter("object", _("Object"), "Sprite")
+      .SetHidden();
 
-      .AddParameter("object", _("Object"), "Sprite");
-
+  // Deprecated
   obj.AddAction("TourneVers",
                 "Rotate an object toward another",
                 "Rotate an object towards another.",
@@ -504,7 +551,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
       .AddParameter("object", _("Object"), "Sprite")
       .AddParameter("objectPtr", "Rotate toward this object")
       .AddCodeOnlyParameter("currentScene", "")
-      .SetHidden();  // Deprecated
+      .SetHidden();
 
   obj.AddExpression("X",
                     _("X position of a point"),
@@ -542,6 +589,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
       .AddParameter("object", _("Object"), "Sprite")
       .AddParameter("objectPointName", _("Name of the point"));
 
+  // Deprecated
   obj.AddExpression("Direc",
                     _("Direction"),
                     _("Direction of the object"),
@@ -550,6 +598,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
       .SetHidden()
       .AddParameter("object", _("Object"), "Sprite");
 
+  // Deprecated
   obj.AddExpression("Direction",
                     _("Direction"),
                     _("Direction of the object"),
@@ -559,6 +608,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                     // interface.
       .AddParameter("object", _("Object"), "Sprite");
 
+  // Deprecated
   obj.AddExpression("Anim",
                     _("Animation"),
                     _("Animation of the object"),
@@ -567,18 +617,22 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
       .SetHidden()
       .AddParameter("object", _("Object"), "Sprite");
 
+  // Deprecated
   obj.AddExpression("Animation",
                     _("Animation"),
                     _("Animation of the object"),
                     _("Animations and images"),
                     "res/actions/animation.png")
+      .SetHidden()
       .AddParameter("object", _("Object"), "Sprite");
 
+  // Deprecated
   obj.AddStrExpression("AnimationName",
                        _("Animation name"),
                        _("Name of the animation of the object"),
                        _("Animations and images"),
                        "res/actions/animation.png")
+      .SetHidden()
       .AddParameter("object", _("Object"), "Sprite");
 
   obj.AddExpression("Sprite",
@@ -595,11 +649,13 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                     "res/actions/sprite.png")
       .AddParameter("object", _("Object"), "Sprite");
 
+  // Deprecated
   obj.AddExpression("AnimationSpeedScale",
                     _("Animation speed scale"),
                     _("Animation speed scale"),
                     _("Animations and images"),
                     "res/actions/animation.png")
+      .SetHidden()
       .AddParameter("object", _("Object"), "Sprite");
 
   obj.AddExpression("ScaleX",
@@ -607,6 +663,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                     _("Scale of the width of an object"),
                     _("Size"),
                     "res/actions/scaleWidth_black.png")
+      .SetHidden()
       .AddParameter("object", _("Object"), "Sprite");
 
   obj.AddExpression("ScaleY",
@@ -614,14 +671,17 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsSpriteExtension(
                     _("Scale of the height of an object"),
                     _("Size"),
                     "res/actions/scaleHeight_black.png")
+      .SetHidden()
       .AddParameter("object", _("Object"), "Sprite");
 
+  // Deprecated
   obj.AddExpression("Opacity",
                     _("Opacity"),
                     _("Opacity"),
                     _("Opacity"),
                     "res/actions/opacity.png")
-      .AddParameter("object", _("Object"), "Sprite");
+      .AddParameter("object", _("Object"), "Sprite")
+      .SetHidden();
 
   extension
       .AddCondition("Collision",

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

@@ -25,13 +25,16 @@ namespace gd {
 
 Animation SpriteObject::badAnimation;
 
-SpriteObject::SpriteObject() : updateIfNotVisible(false) {}
+SpriteObject::SpriteObject()
+    : updateIfNotVisible(false), adaptCollisionMaskAutomatically(true) {}
 
 SpriteObject::~SpriteObject(){};
 
 void SpriteObject::DoUnserializeFrom(gd::Project& project,
                                      const gd::SerializerElement& element) {
   updateIfNotVisible = element.GetBoolAttribute("updateIfNotVisible", true);
+  adaptCollisionMaskAutomatically =
+      element.GetBoolAttribute("adaptCollisionMaskAutomatically", false);
 
   RemoveAllAnimations();
   const gd::SerializerElement& animationsElement =
@@ -80,6 +83,8 @@ void SpriteObject::DoUnserializeFrom(gd::Project& project,
 
 void SpriteObject::DoSerializeTo(gd::SerializerElement& element) const {
   element.SetAttribute("updateIfNotVisible", updateIfNotVisible);
+  element.SetAttribute("adaptCollisionMaskAutomatically",
+                       adaptCollisionMaskAutomatically);
 
   // Animations
   gd::SerializerElement& animationsElement = element.AddChild("animations");

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

@@ -47,8 +47,7 @@ class GD_CORE_API SpriteObject : public gd::ObjectConfiguration {
   void ExposeResources(gd::ArbitraryResourceWorker& worker) override;
 
   std::map<gd::String, gd::PropertyDescriptor> GetProperties() const override;
-  bool UpdateProperty(const gd::String& name,
-                      const gd::String& value) override;
+  bool UpdateProperty(const gd::String& name, const gd::String& value) override;
 
   std::map<gd::String, gd::PropertyDescriptor> GetInitialInstanceProperties(
       const gd::InitialInstance& position,
@@ -118,14 +117,30 @@ class GD_CORE_API SpriteObject : public gd::ObjectConfiguration {
   const std::vector<Animation>& GetAllAnimations() const { return animations; }
 
   /**
-   * \brief Set if the object animation should be played even if the object is hidden
-   * or far from the camera.
+   * @brief Check if the collision mask adapts automatically to the animation.
    */
-  void SetUpdateIfNotVisible(bool updateIfNotVisible_) { updateIfNotVisible = updateIfNotVisible_; }
+  bool AdaptCollisionMaskAutomatically() const {
+    return adaptCollisionMaskAutomatically;
+  }
 
   /**
-   * \brief Check if the object animation should be played even if the object is hidden
-   * or far from the camera (false by default).
+   * @brief Set if the collision mask adapts automatically to the animation.
+   */
+  void SetAdaptCollisionMaskAutomatically(bool enable) {
+    adaptCollisionMaskAutomatically = enable;
+  }
+
+  /**
+   * \brief Set if the object animation should be played even if the object is
+   * hidden or far from the camera.
+   */
+  void SetUpdateIfNotVisible(bool updateIfNotVisible_) {
+    updateIfNotVisible = updateIfNotVisible_;
+  }
+
+  /**
+   * \brief Check if the object animation should be played even if the object
+   * is hidden or far from the camera (false by default).
    */
   bool GetUpdateIfNotVisible() const { return updateIfNotVisible; }
   ///@}
@@ -137,11 +152,15 @@ class GD_CORE_API SpriteObject : public gd::ObjectConfiguration {
 
   mutable std::vector<Animation> animations;
   bool updateIfNotVisible;  ///< If set to true, ask the game engine to play
-                            ///< object animation even if hidden or far from the
-                            ///< screen.
+                            ///< object animation even if hidden or far from
+                            ///< the screen.
 
-  static Animation badAnimation;  //< Bad animation when an out of bound
-                                  // animation is requested.
+  static Animation badAnimation;         //< Bad animation when an out of bound
+                                         // animation is requested.
+  bool adaptCollisionMaskAutomatically;  ///< If set to true, the collision
+                                         ///< mask will be automatically
+                                         ///< adapted to the animation of the
+                                         ///< object.
 };
 
 }  // namespace gd

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")

Core/GDCore/Extensions/Metadata/AbstractFunctionMetadata.h

@@ -0,0 +1,135 @@
+/*
+ * 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 <algorithm>
+#include <functional>
+#include <map>
+#include <memory>
+
+#include "GDCore/Events/Instruction.h"
+#include "GDCore/String.h"
+#include "ParameterMetadata.h"
+#include "ParameterOptions.h"
+
+namespace gd {
+class Project;
+class Layout;
+class EventsCodeGenerator;
+class EventsCodeGenerationContext;
+class SerializerElement;
+} // namespace gd
+
+namespace gd {
+
+/**
+ * \brief Describe user-friendly information about an expression or an
+ * instruction (action or condition), its parameters and the function name as
+ * well as other information for code generation.
+ *
+ * \ingroup Events
+ */
+class GD_CORE_API AbstractFunctionMetadata {
+public:
+  AbstractFunctionMetadata(){};
+  virtual ~AbstractFunctionMetadata(){};
+
+  /**
+   * \see gd::InstructionMetadata::AddParameter
+   */
+  virtual AbstractFunctionMetadata &
+  AddParameter(const gd::String &type, const gd::String &label,
+               const gd::String &supplementaryInformation = "",
+               bool parameterIsOptional = false) = 0;
+
+  /**
+   * \see gd::InstructionMetadata::AddCodeOnlyParameter
+   */
+  virtual AbstractFunctionMetadata &
+  AddCodeOnlyParameter(const gd::String &type,
+                       const gd::String &supplementaryInformation) = 0;
+
+  /**
+   * \see gd::InstructionMetadata::SetDefaultValue
+   */
+  virtual AbstractFunctionMetadata &
+  SetDefaultValue(const gd::String &defaultValue) = 0;
+
+  /**
+   * \see gd::InstructionMetadata::SetParameterExtraInfo
+   */
+  virtual AbstractFunctionMetadata &
+  SetParameterExtraInfo(const gd::String &defaultValue) = 0;
+
+  /**
+   * \see gd::InstructionMetadata::SetParameterLongDescription
+   */
+  virtual AbstractFunctionMetadata &
+  SetParameterLongDescription(const gd::String &longDescription) = 0;
+
+  /**
+   * \see gd::InstructionMetadata::SetHidden
+   */
+  virtual AbstractFunctionMetadata &SetHidden() = 0;
+
+  /**
+   * Set that the instruction is private - it can't be used outside of the
+   * object/ behavior that it is attached too.
+   */
+  virtual AbstractFunctionMetadata &SetPrivate() = 0;
+
+  /**
+   * Set that the instruction can be used in layouts or external events.
+   */
+  virtual AbstractFunctionMetadata &SetRelevantForLayoutEventsOnly() = 0;
+
+  /**
+   * Set that the instruction can be used in function events.
+   */
+  virtual AbstractFunctionMetadata &SetRelevantForFunctionEventsOnly() = 0;
+
+  /**
+   * Set that the instruction can be used in asynchronous function events.
+   */
+  virtual AbstractFunctionMetadata &
+  SetRelevantForAsynchronousFunctionEventsOnly() = 0;
+
+  /**
+   * Set that the instruction can be used in custom object events.
+   */
+  virtual AbstractFunctionMetadata &SetRelevantForCustomObjectEventsOnly() = 0;
+
+  /**
+   * \brief Set the function that should be called when generating the source
+   * code from events.
+   * \param functionName the name of the function to call
+   * \note Shortcut for `codeExtraInformation.SetFunctionName`.
+   */
+  virtual AbstractFunctionMetadata &
+  SetFunctionName(const gd::String &functionName) = 0;
+
+  /**
+   * \brief Erase any existing include file and add the specified include.
+   */
+  virtual AbstractFunctionMetadata &
+  SetIncludeFile(const gd::String &includeFile) = 0;
+
+  /**
+   * \brief Add a file to the already existing include files.
+   */
+  virtual AbstractFunctionMetadata &
+  AddIncludeFile(const gd::String &includeFile) = 0;
+
+  /**
+   * \brief Get the files that must be included to use the instruction.
+   */
+  virtual const std::vector<gd::String> &GetIncludeFiles() const = 0;
+
+private:
+};
+
+} // namespace gd

Core/GDCore/Extensions/Metadata/BehaviorMetadata.cpp

@@ -34,8 +34,7 @@ BehaviorMetadata::BehaviorMetadata(
       className(className_),
       iconFilename(icon24x24),
       instance(instance_),
-      sharedDatasInstance(sharedDatasInstance_),
-      isEventBased(false) {
+      sharedDatasInstance(sharedDatasInstance_) {
   SetFullName(gd::String(fullname_));
   SetDescription(gd::String(description_));
   SetDefaultName(gd::String(defaultName_));
@@ -52,29 +51,6 @@ BehaviorMetadata::BehaviorMetadata(
   if (sharedDatasInstance) sharedDatasInstance->SetTypeName(nameWithNamespace);
 }
 
-BehaviorMetadata::BehaviorMetadata(
-    const gd::String& extensionNamespace,
-    const gd::String& nameWithNamespace,
-    const gd::String& fullname_,
-    const gd::String& defaultName_,
-    const gd::String& description_,
-    const gd::String& group_,
-    const gd::String& icon24x24_): BehaviorMetadata(
-        extensionNamespace,
-        nameWithNamespace,
-        fullname_,
-        defaultName_,
-        description_,
-        group_,
-        icon24x24_,
-        // Class name is the name, actually unused
-        defaultName_,
-        // It is only used to get the name for GetName.
-        gd::make_unique<gd::Behavior>("", nameWithNamespace),
-        nullptr){
-  isEventBased = true;
-};
-
 gd::InstructionMetadata& BehaviorMetadata::AddCondition(
     const gd::String& name,
     const gd::String& fullname,
@@ -420,10 +396,6 @@ const gd::String& BehaviorMetadata::GetName() const {
 }
 
 gd::Behavior& BehaviorMetadata::Get() const {
-  if (isEventBased) {
-    gd::LogFatalError("Error: Event-based behaviors don't have blueprint. "
-                      "This method should not never be called.");
-  }
   if (!instance) {
     gd::LogFatalError(
         "Trying to get a behavior from a BehaviorMetadata that has no "
@@ -434,11 +406,20 @@ gd::Behavior& BehaviorMetadata::Get() const {
 }
 
 gd::BehaviorsSharedData* BehaviorMetadata::GetSharedDataInstance() const { 
-  if (isEventBased) {
-    gd::LogFatalError("Error: Event-based behaviors don't have blueprint. "
-                      "This method should not never be called.");
-  }
   return sharedDatasInstance.get();
 }
 
+const std::vector<gd::String>& BehaviorMetadata::GetRequiredBehaviorTypes() const {
+  requiredBehaviors.clear();
+  for (auto& property : Get().GetProperties()) {
+    const String& propertyName = property.first;
+    const gd::PropertyDescriptor& propertyDescriptor = property.second;
+
+    if (propertyDescriptor.GetType() == "Behavior") {
+      requiredBehaviors.push_back(propertyDescriptor.GetExtraInfo()[0]);
+    }
+  }
+  return requiredBehaviors;
+}
+
 }  // namespace gd

Core/GDCore/Extensions/Metadata/BehaviorMetadata.h

@@ -3,8 +3,10 @@
  * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
  * reserved. This project is released under the MIT License.
  */
-#ifndef BEHAVIORMETADATA_H
-#define BEHAVIORMETADATA_H
+#pragma once
+
+#include "InstructionOrExpressionContainerMetadata.h"
+
 #include <map>
 
 #include "GDCore/Extensions/Metadata/ExpressionMetadata.h"
@@ -25,7 +27,7 @@ namespace gd {
  *
  * \ingroup Events
  */
-class GD_CORE_API BehaviorMetadata {
+class GD_CORE_API BehaviorMetadata : public InstructionOrExpressionContainerMetadata {
  public:
   BehaviorMetadata(
       const gd::String& extensionNamespace,
@@ -67,7 +69,7 @@ class GD_CORE_API BehaviorMetadata {
                                         const gd::String& sentence_,
                                         const gd::String& group_,
                                         const gd::String& icon_,
-                                        const gd::String& smallicon_);
+                                        const gd::String& smallicon_) override;
 
   /**
    * Declare a new action as being part of the behavior.
@@ -80,7 +82,7 @@ class GD_CORE_API BehaviorMetadata {
                                      const gd::String& sentence_,
                                      const gd::String& group_,
                                      const gd::String& icon_,
-                                     const gd::String& smallicon_);
+                                     const gd::String& smallicon_) override;
 
   /**
    * Declare a new condition as being part of the behavior.
@@ -91,7 +93,7 @@ class GD_CORE_API BehaviorMetadata {
                                               const gd::String& sentence_,
                                               const gd::String& group_,
                                               const gd::String& icon_,
-                                              const gd::String& smallicon_);
+                                              const gd::String& smallicon_) override;
 
   /**
    * Declare a new action as being part of the behavior.
@@ -102,7 +104,7 @@ class GD_CORE_API BehaviorMetadata {
                                            const gd::String& sentence_,
                                            const gd::String& group_,
                                            const gd::String& icon_,
-                                           const gd::String& smallicon_);
+                                           const gd::String& smallicon_) override;
   /**
    * Declare a new action as being part of the extension.
    */
@@ -110,7 +112,7 @@ class GD_CORE_API BehaviorMetadata {
                                         const gd::String& fullname_,
                                         const gd::String& description_,
                                         const gd::String& group_,
-                                        const gd::String& smallicon_);
+                                        const gd::String& smallicon_) override;
 
   /**
    * Declare a new string expression as being part of the extension.
@@ -119,7 +121,7 @@ class GD_CORE_API BehaviorMetadata {
                                            const gd::String& fullname_,
                                            const gd::String& description_,
                                            const gd::String& group_,
-                                           const gd::String& smallicon_);
+                                           const gd::String& smallicon_) override;
 
   /**
    * \brief Declare a new expression and condition as being part of the
@@ -134,7 +136,7 @@ class GD_CORE_API BehaviorMetadata {
       const gd::String& description,
       const gd::String& sentenceName,
       const gd::String& group,
-      const gd::String& icon);
+      const gd::String& icon) override;
 
   /**
    * \brief Declare a new expression, condition and action as being part of the
@@ -151,7 +153,7 @@ class GD_CORE_API BehaviorMetadata {
       const gd::String& description,
       const gd::String& sentenceName,
       const gd::String& group,
-      const gd::String& icon);
+      const gd::String& icon) override;
 
   /**
    * \brief Create a new action which is the duplicate of the specified one.
@@ -160,7 +162,7 @@ class GD_CORE_API BehaviorMetadata {
    * one.
    */
   gd::InstructionMetadata& AddDuplicatedAction(
-      const gd::String& newActionName, const gd::String& copiedActionName);
+      const gd::String& newActionName, const gd::String& copiedActionName) override;
 
   /**
    * \brief Create a new condition which is the duplicate of the specified one.
@@ -170,7 +172,7 @@ class GD_CORE_API BehaviorMetadata {
    */
   gd::InstructionMetadata& AddDuplicatedCondition(
       const gd::String& newConditionName,
-      const gd::String& copiedConditionName);
+      const gd::String& copiedConditionName) override;
 
   /**
    * \brief Create a new expression which is the duplicate of the specified one.
@@ -193,9 +195,9 @@ class GD_CORE_API BehaviorMetadata {
       const gd::String& newExpressionName,
       const gd::String& copiedExpressionName);
 
-  BehaviorMetadata& SetFullName(const gd::String& fullname_);
+  BehaviorMetadata& SetFullName(const gd::String& fullname_) override;
   BehaviorMetadata& SetDefaultName(const gd::String& defaultName_);
-  BehaviorMetadata& SetDescription(const gd::String& description_);
+  BehaviorMetadata& SetDescription(const gd::String& description_) override;
   BehaviorMetadata& SetGroup(const gd::String& group_);
 
   /**
@@ -203,12 +205,12 @@ class GD_CORE_API BehaviorMetadata {
    * \note The requirement may vary depending on the platform: Most of the time,
    * the include file contains the declaration of the behavior.
    */
-  BehaviorMetadata& SetIncludeFile(const gd::String& includeFile);
+  BehaviorMetadata& SetIncludeFile(const gd::String& includeFile) override;
 
   /**
    * \brief Add a file to the already existing include files.
    */
-  BehaviorMetadata& AddIncludeFile(const gd::String& includeFile);
+  BehaviorMetadata& AddIncludeFile(const gd::String& includeFile) override;
 
   /**
    * \brief Add a file to the already existing required files.
@@ -221,7 +223,7 @@ class GD_CORE_API BehaviorMetadata {
    * Get the help path of the behavior, relative to the GDevelop documentation
    * root.
    */
-  const gd::String& GetHelpPath() const { return helpPath; }
+  const gd::String& GetHelpPath() const override { return helpPath; }
 
   /**
    * Set the help path of the behavior, relative to the GDevelop documentation
@@ -230,17 +232,17 @@ class GD_CORE_API BehaviorMetadata {
    * The behavior instructions will have this help path set by
    * default, unless you call SetHelpPath on them.
    */
-  BehaviorMetadata& SetHelpPath(const gd::String& path) {
+  BehaviorMetadata& SetHelpPath(const gd::String& path) override {
     helpPath = path;
     return *this;
   }
 
-  const gd::String& GetName() const;
-  const gd::String& GetFullName() const { return fullname; }
+  const gd::String& GetName() const override;
+  const gd::String& GetFullName() const override { return fullname; }
   const gd::String& GetDefaultName() const { return defaultName; }
-  const gd::String& GetDescription() const { return description; }
+  const gd::String& GetDescription() const override { return description; }
   const gd::String& GetGroup() const { return group; }
-  const gd::String& GetIconFilename() const { return iconFilename; }
+  const gd::String& GetIconFilename() const override { return iconFilename; }
 
   /**
    * \brief Set the type of the object that this behavior can be used on.
@@ -257,6 +259,11 @@ class GD_CORE_API BehaviorMetadata {
    */
   const gd::String& GetObjectType() const { return objectType; }
 
+  /**
+   * \brief Get the types of the behaviors that are required by this behavior.
+   */
+  const std::vector<gd::String>& GetRequiredBehaviorTypes() const;
+
   /**
    * Check if the behavior is private - it can't be used outside of its
    * extension.
@@ -272,6 +279,21 @@ class GD_CORE_API BehaviorMetadata {
     return *this;
   }
 
+  /**
+   * Check if the behavior is hidden - it can be used but not attached to
+   * objects by users.
+   */
+  bool IsHidden() const { return isHidden; }
+
+  /**
+   * Set that the behavior is hidden - it can be used but not attached to
+   * objects by users.
+   */
+  BehaviorMetadata &SetHidden() {
+    isHidden = true;
+    return *this;
+  }
+
   /**
    * \brief Return the associated gd::Behavior, handling behavior contents.
    * 
@@ -293,22 +315,22 @@ class GD_CORE_API BehaviorMetadata {
    * \brief Return a reference to a map containing the names of the actions
    * (as keys) and the metadata associated with (as values).
    */
-  std::map<gd::String, gd::InstructionMetadata>& GetAllActions() { return actionsInfos; };
+  std::map<gd::String, gd::InstructionMetadata>& GetAllActions() override { return actionsInfos; };
 
   /**
    * \see gd::PlatformExtension::GetAllActions
    */
-  std::map<gd::String, gd::InstructionMetadata>& GetAllConditions() { return conditionsInfos; };
+  std::map<gd::String, gd::InstructionMetadata>& GetAllConditions() override { return conditionsInfos; };
 
   /**
    * \see gd::PlatformExtension::GetAllActions
    */
-  std::map<gd::String, gd::ExpressionMetadata>& GetAllExpressions() { return expressionsInfos; };
+  std::map<gd::String, gd::ExpressionMetadata>& GetAllExpressions() override { return expressionsInfos; };
 
   /**
    * \see gd::PlatformExtension::GetAllActions
    */
-  std::map<gd::String, gd::ExpressionMetadata>& GetAllStrExpressions() { return strExpressionsInfos; };
+  std::map<gd::String, gd::ExpressionMetadata>& GetAllStrExpressions() override { return strExpressionsInfos; };
 
   std::map<gd::String, gd::InstructionMetadata> conditionsInfos;
   std::map<gd::String, gd::InstructionMetadata> actionsInfos;
@@ -328,14 +350,13 @@ class GD_CORE_API BehaviorMetadata {
   gd::String group;
   gd::String iconFilename;
   gd::String objectType;
+  mutable std::vector<gd::String> requiredBehaviors;
   bool isPrivate = false;
+  bool isHidden = false;
 
   // TODO: Nitpicking: convert these to std::unique_ptr to clarify ownership.
   std::shared_ptr<gd::Behavior> instance;
   std::shared_ptr<gd::BehaviorsSharedData> sharedDatasInstance;
-  bool isEventBased;
 };
 
 }  // namespace gd
-
-#endif  // BEHAVIORMETADATA_H

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.h

@@ -3,9 +3,10 @@
  * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
  * reserved. This project is released under the MIT License.
  */
-#ifndef EXPRESSIONMETADATA_H
-#define EXPRESSIONMETADATA_H
-#if defined(GD_IDE_ONLY)
+#pragma once
+
+#include "AbstractFunctionMetadata.h"
+
 #include <functional>
 #include <memory>
 
@@ -17,7 +18,6 @@ class Layout;
 }
 
 namespace gd {
-
 /**
  * \brief Information about how generate code for an expression
  */
@@ -27,79 +27,7 @@ class ExpressionCodeGenerationInformation {
       : staticFunction(false), hasCustomCodeGenerator(false){};
   virtual ~ExpressionCodeGenerationInformation(){};
 
-  /**
-   * \brief Set the function name which will be used when generating the code.
-   * \param functionName the name of the function to call
-   */
-  ExpressionCodeGenerationInformation& SetFunctionName(
-      const gd::String& functionName) {
-    functionCallName = functionName;
-    return *this;
-  }
-
-  /**
-   * \brief Set that the function is static
-   */
-  ExpressionCodeGenerationInformation& SetStatic() {
-    staticFunction = true;
-    return *this;
-  }
-
-  /**
-   * \brief Erase any existing include file and add the specified include.
-   */
-  ExpressionCodeGenerationInformation& SetIncludeFile(
-      const gd::String& includeFile) {
-    includeFiles.clear();
-    includeFiles.push_back(includeFile);
-    return *this;
-  }
-
-  /**
-   * \brief Add a file to the already existing include files.
-   */
-  ExpressionCodeGenerationInformation& AddIncludeFile(
-      const gd::String& includeFile) {
-    if (std::find(includeFiles.begin(), includeFiles.end(), includeFile) ==
-        includeFiles.end())
-      includeFiles.push_back(includeFile);
-
-    return *this;
-  }
-
-  /**
-   * \brief Get the files that must be included to use the instruction.
-   */
-  const std::vector<gd::String>& GetIncludeFiles() const {
-    return includeFiles;
-  };
-
-  /**
-   * \brief Set that the function must be generated using a custom code
-   * generator.
-   */
-  ExpressionCodeGenerationInformation& SetCustomCodeGenerator(
-      std::function<gd::String(const std::vector<gd::Expression>& parameters,
-                               gd::EventsCodeGenerator& codeGenerator,
-                               gd::EventsCodeGenerationContext& context)>
-          codeGenerator) {
-    hasCustomCodeGenerator = true;
-    customCodeGenerator = codeGenerator;
-    return *this;
-  }
-
-  ExpressionCodeGenerationInformation& RemoveCustomCodeGenerator() {
-    hasCustomCodeGenerator = false;
-    std::function<gd::String(const std::vector<gd::Expression>& parameters,
-                             gd::EventsCodeGenerator& codeGenerator,
-                             gd::EventsCodeGenerationContext& context)>
-        emptyFunction;
-    customCodeGenerator = emptyFunction;
-    return *this;
-  }
-
-  bool HasCustomCodeGenerator() const { return hasCustomCodeGenerator; }
-
+  // TODO Move these attributes to ExpressionMetadata.
   bool staticFunction;
   gd::String functionCallName;
   bool hasCustomCodeGenerator;
@@ -107,8 +35,6 @@ class ExpressionCodeGenerationInformation {
                            gd::EventsCodeGenerator& codeGenerator,
                            gd::EventsCodeGenerationContext& context)>
       customCodeGenerator;
-
- private:
   std::vector<gd::String> includeFiles;
 };
 
@@ -118,7 +44,7 @@ class ExpressionCodeGenerationInformation {
  *
  * \ingroup Events
  */
-class GD_CORE_API ExpressionMetadata {
+class GD_CORE_API ExpressionMetadata : public gd::AbstractFunctionMetadata {
  public:
   /**
    * Construct a new expression metadata.
@@ -144,7 +70,7 @@ class GD_CORE_API ExpressionMetadata {
   /**
    * \brief Set the expression as not shown in the IDE.
    */
-  ExpressionMetadata& SetHidden();
+  ExpressionMetadata& SetHidden() override;
 
   /**
    * \brief Set the group of the instruction in the IDE.
@@ -179,7 +105,7 @@ class GD_CORE_API ExpressionMetadata {
    * Set that the instruction is private - it can't be used outside of the
    * object/ behavior that it is attached too.
    */
-  ExpressionMetadata& SetPrivate() {
+  ExpressionMetadata& SetPrivate() override {
     isPrivate = true;
     return *this;
   }
@@ -216,7 +142,7 @@ class GD_CORE_API ExpressionMetadata {
   /**
    * Set that the instruction can be used in layouts or external events.
    */
-  ExpressionMetadata &SetRelevantForLayoutEventsOnly() {
+  ExpressionMetadata &SetRelevantForLayoutEventsOnly() override {
     relevantContext = "Layout";
     return *this;
   }
@@ -224,7 +150,7 @@ class GD_CORE_API ExpressionMetadata {
   /**
    * Set that the instruction can be used in function events.
    */
-  ExpressionMetadata &SetRelevantForFunctionEventsOnly() {
+  ExpressionMetadata &SetRelevantForFunctionEventsOnly() override {
     relevantContext = "Function";
     return *this;
   }
@@ -232,7 +158,7 @@ class GD_CORE_API ExpressionMetadata {
   /**
    * Set that the instruction can be used in asynchronous function events.
    */
-  ExpressionMetadata &SetRelevantForAsynchronousFunctionEventsOnly() {
+  ExpressionMetadata &SetRelevantForAsynchronousFunctionEventsOnly() override {
     relevantContext = "AsynchronousFunction";
     return *this;
   }
@@ -240,7 +166,7 @@ class GD_CORE_API ExpressionMetadata {
   /**
    * Set that the instruction can be used in custom object events.
    */
-  ExpressionMetadata &SetRelevantForCustomObjectEventsOnly() {
+  ExpressionMetadata &SetRelevantForCustomObjectEventsOnly() override {
     relevantContext = "Object";
     return *this;
   }
@@ -248,17 +174,17 @@ class GD_CORE_API ExpressionMetadata {
   /**
    * \see gd::InstructionMetadata::AddParameter
    */
-  gd::ExpressionMetadata& AddParameter(
-      const gd::String& type,
-      const gd::String& description,
-      const gd::String& supplementaryInformation = "",
-      bool parameterIsOptional = false);
+  gd::ExpressionMetadata &
+  AddParameter(const gd::String &type, const gd::String &label,
+               const gd::String &supplementaryInformation = "",
+               bool parameterIsOptional = false) override;
 
   /**
    * \see gd::InstructionMetadata::AddCodeOnlyParameter
    */
-  gd::ExpressionMetadata& AddCodeOnlyParameter(
-      const gd::String& type, const gd::String& supplementaryInformation);
+  gd::ExpressionMetadata &
+  AddCodeOnlyParameter(const gd::String &type,
+                       const gd::String &supplementaryInformation) override;
 
   /**
    * Set the default value used in editor (or if an optional parameter is empty
@@ -266,8 +192,9 @@ class GD_CORE_API ExpressionMetadata {
    *
    * \see AddParameter
    */
-  ExpressionMetadata& SetDefaultValue(gd::String defaultValue_) {
-    if (!parameters.empty()) parameters.back().SetDefaultValue(defaultValue_);
+  ExpressionMetadata &SetDefaultValue(const gd::String &defaultValue) override {
+    if (!parameters.empty())
+      parameters.back().SetDefaultValue(defaultValue);
     return *this;
   };
 
@@ -277,7 +204,8 @@ class GD_CORE_API ExpressionMetadata {
    *
    * \see AddParameter
    */
-  ExpressionMetadata& SetParameterLongDescription(gd::String longDescription) {
+  ExpressionMetadata &
+  SetParameterLongDescription(const gd::String &longDescription) override {
     if (!parameters.empty())
       parameters.back().SetLongDescription(longDescription);
     return *this;
@@ -290,7 +218,8 @@ class GD_CORE_API ExpressionMetadata {
    *
    * \see AddParameter
    */
-  ExpressionMetadata &SetParameterExtraInfo(const gd::String &extraInfo) {
+  ExpressionMetadata &SetParameterExtraInfo(
+      const gd::String &extraInfo) override {
     if (!parameters.empty()) parameters.back().SetExtraInfo(extraInfo);
     return *this;
   }
@@ -312,50 +241,6 @@ class GD_CORE_API ExpressionMetadata {
     return requiredBaseObjectCapability;
   };
 
-  /**
-   * \brief Set the function that should be called when generating the source
-   * code from events.
-   * \param functionName the name of the function to call
-   * \note Shortcut for `codeExtraInformation.SetFunctionName`.
-   */
-  ExpressionCodeGenerationInformation& SetFunctionName(
-      const gd::String& functionName) {
-    return codeExtraInformation.SetFunctionName(functionName);
-  }
-
-  /**
-   * \brief Return the structure containing the information about code
-   * generation for the expression.
-   */
-  ExpressionCodeGenerationInformation& GetCodeExtraInformation() {
-    return codeExtraInformation;
-  }
-
-  /**
-   * \brief Erase any existing include file and add the specified include.
-   */
-  ExpressionMetadata &SetIncludeFile(const gd::String &includeFile) {
-    codeExtraInformation.SetIncludeFile(includeFile);
-    return *this;
-  }
-
-  /**
-   * \brief Add a file to the already existing include files.
-   */
-  ExpressionMetadata &AddIncludeFile(const gd::String &includeFile) {
-    codeExtraInformation.AddIncludeFile(includeFile);
-    return *this;
-  }
-
-  /**
-   * \brief Get the files that must be included to use the instruction.
-   */
-  const std::vector<gd::String>& GetIncludeFiles() const {
-    return codeExtraInformation.GetIncludeFiles();
-  }
-
-  ExpressionCodeGenerationInformation codeExtraInformation;
-
   bool IsShown() const { return shown; }
   const gd::String& GetReturnType() const { return returnType; }
   const gd::String& GetFullName() const { return fullname; }
@@ -375,6 +260,99 @@ class GD_CORE_API ExpressionMetadata {
 
   std::vector<gd::ParameterMetadata> parameters;
 
+  
+  /**
+   * \brief Set the function name which will be used when generating the code.
+   * \param functionName the name of the function to call
+   */
+  ExpressionMetadata& SetFunctionName(
+      const gd::String& functionName) override {
+    codeExtraInformation.functionCallName = functionName;
+    return *this;
+  }
+
+
+  /**
+   * \brief Return the name of the function which will be called in the generated code.
+   */
+  const gd::String &GetFunctionName() {
+    return codeExtraInformation.functionCallName;
+  }
+  /**
+   * \brief Set that the function is static
+   */
+  ExpressionMetadata& SetStatic() {
+    codeExtraInformation.staticFunction = true;
+    return *this;
+  }
+
+  /**
+   * \brief Erase any existing include file and add the specified include.
+   */
+  ExpressionMetadata& SetIncludeFile(
+      const gd::String& includeFile) override {
+    codeExtraInformation.includeFiles.clear();
+    codeExtraInformation.includeFiles.push_back(includeFile);
+    return *this;
+  }
+
+  /**
+   * \brief Add a file to the already existing include files.
+   */
+  ExpressionMetadata& AddIncludeFile(
+      const gd::String& includeFile) override {
+    if (std::find(codeExtraInformation.includeFiles.begin(), codeExtraInformation.includeFiles.end(), includeFile) ==
+        codeExtraInformation.includeFiles.end())
+      codeExtraInformation.includeFiles.push_back(includeFile);
+
+    return *this;
+  }
+
+  /**
+   * \brief Get the files that must be included to use the instruction.
+   */
+  const std::vector<gd::String>& GetIncludeFiles() const override {
+    return codeExtraInformation.includeFiles;
+  };
+
+  /**
+   * \brief Set that the function must be generated using a custom code
+   * generator.
+   */
+  ExpressionMetadata& SetCustomCodeGenerator(
+      std::function<gd::String(const std::vector<gd::Expression>& parameters,
+                               gd::EventsCodeGenerator& codeGenerator,
+                               gd::EventsCodeGenerationContext& context)>
+          codeGenerator) {
+    codeExtraInformation.hasCustomCodeGenerator = true;
+    codeExtraInformation.customCodeGenerator = codeGenerator;
+    return *this;
+  }
+
+  ExpressionMetadata& RemoveCustomCodeGenerator() {
+    codeExtraInformation.hasCustomCodeGenerator = false;
+    std::function<gd::String(const std::vector<gd::Expression>& parameters,
+                             gd::EventsCodeGenerator& codeGenerator,
+                             gd::EventsCodeGenerationContext& context)>
+        emptyFunction;
+    codeExtraInformation.customCodeGenerator = emptyFunction;
+    return *this;
+  }
+
+  bool HasCustomCodeGenerator() const { return codeExtraInformation.hasCustomCodeGenerator; }
+
+  /**
+   * \brief Return the structure containing the information about code
+   * generation for the expression.
+   * 
+   * \deprecated
+   */
+  ExpressionMetadata& GetCodeExtraInformation() {
+    return *this;
+  }
+
+  ExpressionCodeGenerationInformation codeExtraInformation;
+
  private:
   gd::String returnType;
   gd::String fullname;
@@ -391,6 +369,3 @@ class GD_CORE_API ExpressionMetadata {
 };
 
 }  // namespace gd
-
-#endif
-#endif  // EXPRESSIONMETADATA_H

Core/GDCore/Extensions/Metadata/InstructionMetadata.h

@@ -4,8 +4,10 @@
  * reserved. This project is released under the MIT License.
  */
 
-#ifndef INSTRUCTIONMETADATA_H
-#define INSTRUCTIONMETADATA_H
+#pragma once
+
+#include "AbstractFunctionMetadata.h"
+
 #include <algorithm>
 #include <functional>
 #include <map>
@@ -33,7 +35,7 @@ namespace gd {
  *
  * \ingroup Events
  */
-class GD_CORE_API InstructionMetadata {
+class GD_CORE_API InstructionMetadata : public gd::AbstractFunctionMetadata {
  public:
   /**
    * Construct a new instruction metadata.
@@ -96,7 +98,7 @@ class GD_CORE_API InstructionMetadata {
    * Set that the instruction is private - it can't be used outside of the
    * object/ behavior that it is attached too.
    */
-  InstructionMetadata &SetPrivate() {
+  InstructionMetadata &SetPrivate() override {
     isPrivate = true;
     return *this;
   }
@@ -133,7 +135,7 @@ class GD_CORE_API InstructionMetadata {
   /**
    * Set that the instruction can be used in layouts or external events.
    */
-  InstructionMetadata &SetRelevantForLayoutEventsOnly() {
+  InstructionMetadata &SetRelevantForLayoutEventsOnly() override {
     relevantContext = "Layout";
     return *this;
   }
@@ -141,7 +143,7 @@ class GD_CORE_API InstructionMetadata {
   /**
    * Set that the instruction can be used in function events.
    */
-  InstructionMetadata &SetRelevantForFunctionEventsOnly() {
+  InstructionMetadata &SetRelevantForFunctionEventsOnly() override {
     relevantContext = "Function";
     return *this;
   }
@@ -149,7 +151,7 @@ class GD_CORE_API InstructionMetadata {
   /**
    * Set that the instruction can be used in asynchronous function events.
    */
-  InstructionMetadata &SetRelevantForAsynchronousFunctionEventsOnly() {
+  InstructionMetadata &SetRelevantForAsynchronousFunctionEventsOnly() override {
     relevantContext = "AsynchronousFunction";
     return *this;
   }
@@ -157,7 +159,7 @@ class GD_CORE_API InstructionMetadata {
   /**
    * Set that the instruction can be used in custom object events.
    */
-  InstructionMetadata &SetRelevantForCustomObjectEventsOnly() {
+  InstructionMetadata &SetRelevantForCustomObjectEventsOnly() override {
     relevantContext = "Object";
     return *this;
   }
@@ -192,7 +194,7 @@ class GD_CORE_API InstructionMetadata {
    *
    * Used mainly when an instruction is deprecated.
    */
-  InstructionMetadata &SetHidden() {
+  InstructionMetadata &SetHidden() override {
     hidden = true;
     return *this;
   }
@@ -231,7 +233,7 @@ class GD_CORE_API InstructionMetadata {
       const gd::String &type,
       const gd::String &label,
       const gd::String &supplementaryInformation = "",
-      bool parameterIsOptional = false);
+      bool parameterIsOptional = false) override;
 
   /**
    * \brief Add a parameter not displayed in editor.
@@ -245,7 +247,7 @@ class GD_CORE_API InstructionMetadata {
    * \see EventsCodeGenerator::GenerateParametersCodes
    */
   InstructionMetadata &AddCodeOnlyParameter(
-      const gd::String &type, const gd::String &supplementaryInformation);
+      const gd::String &type, const gd::String &supplementaryInformation) override;
 
   /**
    * \brief Set the default value used in editor (or if an optional parameter is
@@ -253,7 +255,7 @@ class GD_CORE_API InstructionMetadata {
    *
    * \see AddParameter
    */
-  InstructionMetadata &SetDefaultValue(const gd::String &defaultValue_) {
+  InstructionMetadata &SetDefaultValue(const gd::String &defaultValue_) override {
     if (!parameters.empty()) parameters.back().SetDefaultValue(defaultValue_);
     return *this;
   };
@@ -265,7 +267,7 @@ class GD_CORE_API InstructionMetadata {
    * \see AddParameter
    */
   InstructionMetadata &SetParameterLongDescription(
-      const gd::String &longDescription) {
+      const gd::String &longDescription) override {
     if (!parameters.empty())
       parameters.back().SetLongDescription(longDescription);
     return *this;
@@ -278,7 +280,7 @@ class GD_CORE_API InstructionMetadata {
    *
    * \see AddParameter
    */
-  InstructionMetadata &SetParameterExtraInfo(const gd::String &extraInfo) {
+  InstructionMetadata &SetParameterExtraInfo(const gd::String &extraInfo) override {
     if (!parameters.empty()) parameters.back().SetExtraInfo(extraInfo);
     return *this;
   }
@@ -382,128 +384,13 @@ class GD_CORE_API InstructionMetadata {
   /**
    * \brief Defines information about how generate the code for an instruction
    */
-  class ExtraInformation {
+  class ExtraInformation { 
    public:
     enum AccessType { Reference, MutatorAndOrAccessor, Mutators };
     ExtraInformation() : accessType(Reference), hasCustomCodeGenerator(false){};
     virtual ~ExtraInformation(){};
 
-    /**
-     * Set the name of the function which will be called in the generated code.
-     * \param functionName the name of the function to call.
-     */
-    ExtraInformation &SetFunctionName(const gd::String &functionName_) {
-      functionCallName = functionName_;
-      return *this;
-    }
-
-    /**
-     * 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.
-     */
-    ExtraInformation &SetAsyncFunctionName(const gd::String &functionName_) {
-      asyncFunctionCallName = functionName_;
-      return *this;
-    }
-
-    /**
-     * Declare if the instruction being declared is somewhat manipulating in a
-     * standard way.
-     */
-    ExtraInformation &SetManipulatedType(const gd::String &type_) {
-      type = type_;
-      return *this;
-    }
-
-    /**
-     * If InstructionMetadata::ExtraInformation::SetManipulatedType was called
-     * with "number" or "string", this function will tell the code generator the
-     * name of the getter function used to retrieve the data value.
-     *
-     * Usage example:
-     * \code
-     *  obj.AddAction("String",
-     *                 _("Change the string"),
-     *                 _("Change the string of a text"),
-     *                 _("the string"),
-     *                 _("Text"),
-     *                 "CppPlatform/Extensions/text24.png",
-     *                 "CppPlatform/Extensions/text_black.png");
-     *
-     *      .AddParameter("object", _("Object"), "Text", false)
-     *      .AddParameter("operator", _("Modification operator"), "string")
-     *      .AddParameter("string", _("String"))
-     *      .SetFunctionName("SetString").SetManipulatedType("string").SetGetter("GetString");
-     *
-     *  DECLARE_END_OBJECT_ACTION()
-     * \endcode
-     */
-    ExtraInformation &SetGetter(const gd::String &getter) {
-      optionalAssociatedInstruction = getter;
-      accessType = MutatorAndOrAccessor;
-      return *this;
-    }
-
-    ExtraInformation &SetMutators(
-        const std::map<gd::String, gd::String> &mutators) {
-      optionalMutators = mutators;
-      accessType = Mutators;
-      return *this;
-    }
-
-    /**
-     * \brief Erase any existing include file and add the specified include.
-     */
-    ExtraInformation &SetIncludeFile(const gd::String &includeFile) {
-      includeFiles.clear();
-      includeFiles.push_back(includeFile);
-      return *this;
-    }
-
-    /**
-     * \brief Add a file to the already existing include files.
-     */
-    ExtraInformation &AddIncludeFile(const gd::String &includeFile) {
-      if (std::find(includeFiles.begin(), includeFiles.end(), includeFile) ==
-          includeFiles.end())
-        includeFiles.push_back(includeFile);
-
-      return *this;
-    }
-
-    /**
-     * \brief Get the files that must be included to use the instruction.
-     */
-    const std::vector<gd::String> &GetIncludeFiles() const {
-      return includeFiles;
-    };
-
-    ExtraInformation &SetCustomCodeGenerator(
-        std::function<gd::String(Instruction &instruction,
-                                 gd::EventsCodeGenerator &codeGenerator,
-                                 gd::EventsCodeGenerationContext &context)>
-            codeGenerator) {
-      hasCustomCodeGenerator = true;
-      customCodeGenerator = codeGenerator;
-      return *this;
-    }
-
-    ExtraInformation &RemoveCustomCodeGenerator() {
-      hasCustomCodeGenerator = false;
-      std::function<gd::String(Instruction & instruction,
-                               gd::EventsCodeGenerator & codeGenerator,
-                               gd::EventsCodeGenerationContext & context)>
-          emptyFunction;
-      customCodeGenerator = emptyFunction;
-      return *this;
-    }
-
-    bool HasCustomCodeGenerator() const { return hasCustomCodeGenerator; }
-
+    // TODO Move these attributes to InstructionMetadata.
     gd::String functionCallName;
     gd::String asyncFunctionCallName;
     gd::String type;
@@ -512,75 +399,156 @@ class GD_CORE_API InstructionMetadata {
     std::map<gd::String, gd::String> optionalMutators;
     bool hasCustomCodeGenerator;
     std::function<gd::String(Instruction &instruction,
-                             gd::EventsCodeGenerator &codeGenerator,
-                             gd::EventsCodeGenerationContext &context)>
+                              gd::EventsCodeGenerator &codeGenerator,
+                              gd::EventsCodeGenerationContext &context)>
         customCodeGenerator;
-
-   private:
     std::vector<gd::String> includeFiles;
   };
   ExtraInformation codeExtraInformation;  ///< Information about how generate
                                           ///< code for the instruction
 
-  /**
-   * \brief Return the structure containing the information about code
-   * generation for the instruction.
-   */
-  ExtraInformation &GetCodeExtraInformation() { return codeExtraInformation; }
-
-  /**
-   * \brief Declare if the instruction being declared is somewhat manipulating
-   * in a standard way. \param type "number" or "string" \note Shortcut for
-   * `codeExtraInformation.SetManipulatedType(type)`.
-   */
-  ExtraInformation &SetManipulatedType(const gd::String &type_) {
-    return codeExtraInformation.SetManipulatedType(type_);
-  }
-
   /**
    * Set the name of the function which will be called in the generated code.
    * \param functionName the name of the function to call.
-   * \note Shortcut for `codeExtraInformation.SetFunctionName`.
    */
-  ExtraInformation &SetFunctionName(const gd::String &functionName) {
-    return codeExtraInformation.SetFunctionName(functionName);
+  InstructionMetadata &SetFunctionName(const gd::String &functionName_) override {
+    codeExtraInformation.functionCallName = functionName_;
+    return *this;
   }
 
   /**
-   * 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. \note Shortcut for `codeExtraInformation.SetAsyncFunctionName`.
+   * call.
    */
-  ExtraInformation &SetAsyncFunctionName(const gd::String &functionName) {
-    return codeExtraInformation.SetAsyncFunctionName(functionName);
+  InstructionMetadata &SetAsyncFunctionName(const gd::String &functionName_) {
+    codeExtraInformation.asyncFunctionCallName = functionName_;
+    return *this;
+  }
+
+  /**
+   * Return the name of the function which will be called in the generated code.
+   */
+  const gd::String &GetFunctionName() {
+    return codeExtraInformation.functionCallName;
+  }
+
+  /**
+   * Return 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).
+   */
+  const gd::String &GetAsyncFunctionName() {
+    return codeExtraInformation.asyncFunctionCallName;
+  }
+
+/**
+ * \brief Declare if the instruction being declared is somewhat manipulating
+ * in a standard way.
+ * 
+ * \param type "number" or "string"
+ */
+  InstructionMetadata &SetManipulatedType(const gd::String &type_) {
+    codeExtraInformation.type = type_;
+    return *this;
+  }
+
+  /**
+   * If InstructionMetadata::ExtraInformation::SetManipulatedType was called
+   * with "number" or "string", this function will tell the code generator the
+   * name of the getter function used to retrieve the data value.
+   *
+   * Usage example:
+   * \code
+   *  obj.AddAction("String",
+   *                 _("Change the string"),
+   *                 _("Change the string of a text"),
+   *                 _("the string"),
+   *                 _("Text"),
+   *                 "CppPlatform/Extensions/text24.png",
+   *                 "CppPlatform/Extensions/text_black.png");
+   *
+   *      .AddParameter("object", _("Object"), "Text", false)
+   *      .AddParameter("operator", _("Modification operator"), "string")
+   *      .AddParameter("string", _("String"))
+   *      .SetFunctionName("SetString").SetManipulatedType("string").SetGetter("GetString");
+   *
+   *  DECLARE_END_OBJECT_ACTION()
+   * \endcode
+   */
+  InstructionMetadata &SetGetter(const gd::String &getter) {
+    codeExtraInformation.optionalAssociatedInstruction = getter;
+    codeExtraInformation.accessType = codeExtraInformation.MutatorAndOrAccessor;
+    return *this;
+  }
+
+  InstructionMetadata &SetMutators(
+      const std::map<gd::String, gd::String> &mutators) {
+    codeExtraInformation.optionalMutators = mutators;
+    codeExtraInformation.accessType = codeExtraInformation.Mutators;
+    return *this;
   }
 
   /**
    * \brief Erase any existing include file and add the specified include.
    */
-  InstructionMetadata &SetIncludeFile(const gd::String &includeFile) {
-    codeExtraInformation.SetIncludeFile(includeFile);
+  InstructionMetadata &SetIncludeFile(const gd::String &includeFile) override {
+    codeExtraInformation.includeFiles.clear();
+    codeExtraInformation.includeFiles.push_back(includeFile);
     return *this;
   }
 
   /**
    * \brief Add a file to the already existing include files.
    */
-  InstructionMetadata &AddIncludeFile(const gd::String &includeFile) {
-    codeExtraInformation.AddIncludeFile(includeFile);
+  InstructionMetadata &AddIncludeFile(const gd::String &includeFile) override {
+    if (std::find(codeExtraInformation.includeFiles.begin(), codeExtraInformation.includeFiles.end(), includeFile) ==
+        codeExtraInformation.includeFiles.end())
+      codeExtraInformation.includeFiles.push_back(includeFile);
+
     return *this;
   }
 
   /**
    * \brief Get the files that must be included to use the instruction.
    */
-  const std::vector<gd::String> &GetIncludeFiles() const {
-    return codeExtraInformation.GetIncludeFiles();
+  const std::vector<gd::String> &GetIncludeFiles() const override {
+    return codeExtraInformation.includeFiles;
   };
 
+  InstructionMetadata &SetCustomCodeGenerator(
+      std::function<gd::String(Instruction &instruction,
+                                gd::EventsCodeGenerator &codeGenerator,
+                                gd::EventsCodeGenerationContext &context)>
+          codeGenerator) {
+    codeExtraInformation.hasCustomCodeGenerator = true;
+    codeExtraInformation.customCodeGenerator = codeGenerator;
+    return *this;
+  }
+
+  InstructionMetadata &RemoveCustomCodeGenerator() {
+    codeExtraInformation.hasCustomCodeGenerator = false;
+    std::function<gd::String(Instruction & instruction,
+                              gd::EventsCodeGenerator & codeGenerator,
+                              gd::EventsCodeGenerationContext & context)>
+        emptyFunction;
+    codeExtraInformation.customCodeGenerator = emptyFunction;
+    return *this;
+  }
+
+  bool HasCustomCodeGenerator() const { return codeExtraInformation.hasCustomCodeGenerator; }
+
+  /**
+   * \brief Return the structure containing the information about code
+   * generation for the instruction.
+   * 
+   * \deprecated
+   */
+  InstructionMetadata &GetCodeExtraInformation() { return *this; }
+
   std::vector<ParameterMetadata> parameters;
 
  private:
@@ -604,5 +572,3 @@ class GD_CORE_API InstructionMetadata {
 };
 
 }  // namespace gd
-
-#endif  // INSTRUCTIONMETADATA_H

Core/GDCore/Extensions/Metadata/InstructionOrExpressionContainerMetadata.h

@@ -0,0 +1,201 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#pragma once
+
+#include <map>
+
+#include "GDCore/Extensions/Metadata/ExpressionMetadata.h"
+#include "GDCore/Extensions/Metadata/InstructionMetadata.h"
+#include "GDCore/String.h"
+
+namespace gd {
+class Behavior;
+class BehaviorsSharedData;
+class MultipleInstructionMetadata;
+class InstructionMetadata;
+class ExpressionMetadata;
+} // namespace gd
+
+namespace gd {
+
+/**
+ * \brief Contains user-friendly information about instructions and expressions
+ * (usually for a behavior or an object).
+ *
+ * \ingroup Events
+ */
+class GD_CORE_API InstructionOrExpressionContainerMetadata {
+public:
+  InstructionOrExpressionContainerMetadata(){};
+  virtual ~InstructionOrExpressionContainerMetadata(){};
+
+  /**
+   * Declare a new condition as being part of the behavior or object.
+   * \deprecated Prefer using `AddScopedCondition`, to properly namespace
+   * the condition.
+   */
+  virtual gd::InstructionMetadata &
+  AddCondition(const gd::String &name_, const gd::String &fullname_,
+               const gd::String &description_, const gd::String &sentence_,
+               const gd::String &group_, const gd::String &icon_,
+               const gd::String &smallicon_) = 0;
+
+  /**
+   * Declare a new action as being part of the behavior or object.
+   * \deprecated Prefer using `AddScopedAction`, to properly namespace
+   * the action.
+   */
+  virtual gd::InstructionMetadata &
+  AddAction(const gd::String &name_, const gd::String &fullname_,
+            const gd::String &description_, const gd::String &sentence_,
+            const gd::String &group_, const gd::String &icon_,
+            const gd::String &smallicon_) = 0;
+
+  /**
+   * Declare a new condition as being part of the behavior or object.
+   */
+  virtual gd::InstructionMetadata &
+  AddScopedCondition(const gd::String &name_, const gd::String &fullname_,
+                     const gd::String &description_,
+                     const gd::String &sentence_, const gd::String &group_,
+                     const gd::String &icon_, const gd::String &smallicon_) = 0;
+
+  /**
+   * Declare a new action as being part of the behavior or object.
+   */
+  virtual gd::InstructionMetadata &
+  AddScopedAction(const gd::String &name_, const gd::String &fullname_,
+                  const gd::String &description_, const gd::String &sentence_,
+                  const gd::String &group_, const gd::String &icon_,
+                  const gd::String &smallicon_) = 0;
+  /**
+   * Declare a new action as being part of the extension.
+   */
+  virtual gd::ExpressionMetadata &
+  AddExpression(const gd::String &name_, const gd::String &fullname_,
+                const gd::String &description_, const gd::String &group_,
+                const gd::String &smallicon_) = 0;
+
+  /**
+   * Declare a new string expression as being part of the extension.
+   */
+  virtual gd::ExpressionMetadata &
+  AddStrExpression(const gd::String &name_, const gd::String &fullname_,
+                   const gd::String &description_, const gd::String &group_,
+                   const gd::String &smallicon_) = 0;
+
+  /**
+   * \brief Declare a new expression and condition as being part of the
+   * behavior.
+   * \note It's recommended to use this function to avoid declaring twice a
+   * similar expression/condition.
+   */
+  virtual gd::MultipleInstructionMetadata AddExpressionAndCondition(
+      const gd::String &type, const gd::String &name,
+      const gd::String &fullname, const gd::String &description,
+      const gd::String &sentenceName, const gd::String &group,
+      const gd::String &icon) = 0;
+
+  /**
+   * \brief Declare a new expression, condition and action as being part of the
+   * behavior.
+   * \note The action name is prefixed by "Set" (and the namespace, as the
+   * condition).
+   * \note It's recommended to use this function to avoid declaring 3 times a
+   * similar expression/condition/action.
+   */
+  virtual gd::MultipleInstructionMetadata AddExpressionAndConditionAndAction(
+      const gd::String &type, const gd::String &name,
+      const gd::String &fullname, const gd::String &description,
+      const gd::String &sentenceName, const gd::String &group,
+      const gd::String &icon) = 0;
+
+  /**
+   * \brief Create a new action which is the duplicate of the specified one.
+   *
+   * Useful for handling a deprecated action that is just a "copy" of the new
+   * one.
+   */
+  virtual gd::InstructionMetadata &
+  AddDuplicatedAction(const gd::String &newActionName,
+                      const gd::String &copiedActionName) = 0;
+
+  /**
+   * \brief Create a new condition which is the duplicate of the specified one.
+   *
+   * Useful for handling a deprecated condition that is just a "copy" of the new
+   * one.
+   */
+  virtual gd::InstructionMetadata &
+  AddDuplicatedCondition(const gd::String &newConditionName,
+                         const gd::String &copiedConditionName) = 0;
+
+  virtual InstructionOrExpressionContainerMetadata &
+  SetFullName(const gd::String &fullname_) = 0;
+  virtual InstructionOrExpressionContainerMetadata &
+  SetDescription(const gd::String &description_) = 0;
+
+  /**
+   * \brief Erase any existing include file and add the specified include.
+   * \note The requirement may vary depending on the platform: Most of the time,
+   * the include file contains the declaration of the behavior.
+   */
+  virtual InstructionOrExpressionContainerMetadata &
+  SetIncludeFile(const gd::String &includeFile) = 0;
+
+  /**
+   * \brief Add a file to the already existing include files.
+   */
+  virtual InstructionOrExpressionContainerMetadata &
+  AddIncludeFile(const gd::String &includeFile) = 0;
+
+  /**
+   * Get the help path of the behavior, relative to the GDevelop documentation
+   * root.
+   */
+  virtual const gd::String &GetHelpPath() const = 0;
+
+  /**
+   * Set the help path of the behavior, relative to the GDevelop documentation
+   * root.
+   *
+   * The behavior instructions will have this help path set by
+   * default, unless you call SetHelpPath on them.
+   */
+  virtual InstructionOrExpressionContainerMetadata &
+  SetHelpPath(const gd::String &path) = 0;
+
+  virtual const gd::String &GetName() const = 0;
+  virtual const gd::String &GetFullName() const = 0;
+  virtual const gd::String &GetDescription() const = 0;
+  virtual const gd::String &GetIconFilename() const = 0;
+
+  /**
+   * \brief Return a reference to a map containing the names of the actions
+   * (as keys) and the metadata associated with (as values).
+   */
+  virtual std::map<gd::String, gd::InstructionMetadata> &GetAllActions() = 0;
+
+  /**
+   * \see gd::PlatformExtension::GetAllActions
+   */
+  virtual std::map<gd::String, gd::InstructionMetadata> &GetAllConditions() = 0;
+
+  /**
+   * \see gd::PlatformExtension::GetAllActions
+   */
+  virtual std::map<gd::String, gd::ExpressionMetadata> &GetAllExpressions() = 0;
+
+  /**
+   * \see gd::PlatformExtension::GetAllActions
+   */
+  virtual std::map<gd::String, gd::ExpressionMetadata> &
+  GetAllStrExpressions() = 0;
+
+private:
+};
+
+} // 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/MetadataProvider.h

@@ -275,6 +275,10 @@ class GD_CORE_API MetadataProvider {
     return &metadata == &badBehaviorMetadata;
   }
 
+  static bool IsBadObjectMetadata(const gd::ObjectMetadata& metadata) {
+    return &metadata == &badObjectInfo;
+  }
+
   virtual ~MetadataProvider();
 
  private:

Core/GDCore/Extensions/Metadata/MultipleInstructionMetadata.cpp

@@ -1,12 +0,0 @@
-/*
- * GDevelop Core
- * Copyright 2008-present Florian Rival (Florian.Rival@gmail.com). All rights
- * reserved. This project is released under the MIT License.
- */
-#include "MultipleInstructionMetadata.h"
-
-#include "InstructionMetadata.h"
-
-namespace gd {
-
-}  // namespace gd

Core/GDCore/Extensions/Metadata/MultipleInstructionMetadata.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 MULTIPLEINSTRUCTIONSMETADATA_H
-#define MULTIPLEINSTRUCTIONSMETADATA_H
+#pragma once
+
 #include "GDCore/Extensions/Metadata/ExpressionMetadata.h"
 #include "GDCore/Extensions/Metadata/InstructionMetadata.h"
 #include "GDCore/String.h"
@@ -21,7 +21,7 @@ namespace gd {
  *
  * \ingroup PlatformDefinition
  */
-class GD_CORE_API MultipleInstructionMetadata {
+class GD_CORE_API MultipleInstructionMetadata : public AbstractFunctionMetadata {
  public:
   static MultipleInstructionMetadata WithExpressionAndCondition(
       gd::ExpressionMetadata &expression, gd::InstructionMetadata &condition) {
@@ -45,7 +45,7 @@ class GD_CORE_API MultipleInstructionMetadata {
       const gd::String &type,
       const gd::String &label,
       const gd::String &supplementaryInformation = "",
-      bool parameterIsOptional = false) {
+      bool parameterIsOptional = false) override {
     if (expression)
       expression->AddParameter(
           type, label, supplementaryInformation, parameterIsOptional);
@@ -62,7 +62,7 @@ class GD_CORE_API MultipleInstructionMetadata {
    * \see gd::InstructionMetadata::AddCodeOnlyParameter
    */
   MultipleInstructionMetadata &AddCodeOnlyParameter(
-      const gd::String &type, const gd::String &supplementaryInformation) {
+      const gd::String &type, const gd::String &supplementaryInformation) override {
     if (expression)
       expression->AddCodeOnlyParameter(type, supplementaryInformation);
     if (condition)
@@ -74,7 +74,7 @@ class GD_CORE_API MultipleInstructionMetadata {
   /**
    * \see gd::InstructionMetadata::SetDefaultValue
    */
-  MultipleInstructionMetadata &SetDefaultValue(const gd::String &defaultValue) {
+  MultipleInstructionMetadata &SetDefaultValue(const gd::String &defaultValue) override {
     if (expression) expression->SetDefaultValue(defaultValue);
     if (condition) condition->SetDefaultValue(defaultValue);
     if (action) action->SetDefaultValue(defaultValue);
@@ -85,7 +85,7 @@ class GD_CORE_API MultipleInstructionMetadata {
    * \see gd::InstructionMetadata::SetParameterExtraInfo
    */
   MultipleInstructionMetadata &SetParameterExtraInfo(
-      const gd::String &defaultValue) {
+      const gd::String &defaultValue) override {
     if (expression) expression->SetParameterExtraInfo(defaultValue);
     if (condition) condition->SetParameterExtraInfo(defaultValue);
     if (action) action->SetParameterExtraInfo(defaultValue);
@@ -96,7 +96,7 @@ class GD_CORE_API MultipleInstructionMetadata {
    * \see gd::InstructionMetadata::SetParameterLongDescription
    */
   MultipleInstructionMetadata &SetParameterLongDescription(
-      const gd::String &longDescription) {
+      const gd::String &longDescription) override {
     if (expression) expression->SetParameterLongDescription(longDescription);
     if (condition) condition->SetParameterLongDescription(longDescription);
     if (action) action->SetParameterLongDescription(longDescription);
@@ -106,7 +106,7 @@ class GD_CORE_API MultipleInstructionMetadata {
   /**
    * \see gd::InstructionMetadata::SetHidden
    */
-  MultipleInstructionMetadata &SetHidden() {
+  MultipleInstructionMetadata &SetHidden() override {
     if (expression) expression->SetHidden();
     if (condition) condition->SetHidden();
     if (action) action->SetHidden();
@@ -136,47 +136,47 @@ class GD_CORE_API MultipleInstructionMetadata {
     return *this;
   }
 
-  MultipleInstructionMetadata &SetFunctionName(const gd::String &functionName) {
+  MultipleInstructionMetadata &SetFunctionName(const gd::String &functionName) override {
     if (expression) expression->SetFunctionName(functionName);
     if (condition) condition->SetFunctionName(functionName);
-    if (action) action->GetCodeExtraInformation().SetFunctionName(functionName);
+    if (action) action->SetFunctionName(functionName);
     return *this;
   }
 
   MultipleInstructionMetadata &SetGetter(const gd::String &getter) {
     if (expression) expression->SetFunctionName(getter);
     if (condition) condition->SetFunctionName(getter);
-    if (action) action->GetCodeExtraInformation().SetGetter(getter);
+    if (action) action->SetGetter(getter);
     return *this;
   }
 
-  MultipleInstructionMetadata &SetIncludeFile(const gd::String &includeFile) {
+  MultipleInstructionMetadata &SetIncludeFile(const gd::String &includeFile) override {
     if (expression)
-      expression->GetCodeExtraInformation().SetIncludeFile(includeFile);
+      expression->SetIncludeFile(includeFile);
     if (condition)
-      condition->GetCodeExtraInformation().SetIncludeFile(includeFile);
-    if (action) action->GetCodeExtraInformation().SetIncludeFile(includeFile);
+      condition->SetIncludeFile(includeFile);
+    if (action) action->SetIncludeFile(includeFile);
     return *this;
   }
 
-  MultipleInstructionMetadata &AddIncludeFile(const gd::String &includeFile) {
+  MultipleInstructionMetadata &AddIncludeFile(const gd::String &includeFile) override {
     if (expression)
       expression->GetCodeExtraInformation().AddIncludeFile(includeFile);
     if (condition)
-      condition->GetCodeExtraInformation().AddIncludeFile(includeFile);
-    if (action) action->GetCodeExtraInformation().AddIncludeFile(includeFile);
+      condition->AddIncludeFile(includeFile);
+    if (action) action->AddIncludeFile(includeFile);
     return *this;
   }
 
   /**
    * \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 override {
     if (expression)
       return expression->GetCodeExtraInformation().GetIncludeFiles();
     if (condition)
-      return condition->GetCodeExtraInformation().GetIncludeFiles();
-    if (action) return action->GetCodeExtraInformation().GetIncludeFiles();
+      return condition->GetIncludeFiles();
+    if (action) return action->GetIncludeFiles();
     // It can't actually happen.
     throw std::logic_error("no instruction metadata");
   }
@@ -184,7 +184,7 @@ class GD_CORE_API MultipleInstructionMetadata {
   /**
    * \see gd::InstructionMetadata::SetPrivate
    */
-  MultipleInstructionMetadata &SetPrivate() {
+  MultipleInstructionMetadata &SetPrivate() override {
     if (expression) expression->SetPrivate();
     if (condition) condition->SetPrivate();
     if (action) action->SetPrivate();
@@ -218,6 +218,42 @@ class GD_CORE_API MultipleInstructionMetadata {
     return *this;
   }
 
+  /**
+   * Set that the instruction can be used in layouts or external events.
+   */
+  MultipleInstructionMetadata &SetRelevantForLayoutEventsOnly() override {
+    if (condition) condition->SetRelevantForLayoutEventsOnly();
+    if (action) action->SetRelevantForLayoutEventsOnly();
+    return *this;
+  }
+
+  /**
+   * Set that the instruction can be used in function events.
+   */
+  MultipleInstructionMetadata &SetRelevantForFunctionEventsOnly() override {
+    if (condition) condition->SetRelevantForFunctionEventsOnly();
+    if (action) action->SetRelevantForFunctionEventsOnly();
+    return *this;
+  }
+
+  /**
+   * Set that the instruction can be used in asynchronous function events.
+   */
+  MultipleInstructionMetadata &SetRelevantForAsynchronousFunctionEventsOnly() override {
+    if (condition) condition->SetRelevantForAsynchronousFunctionEventsOnly();
+    if (action) action->SetRelevantForAsynchronousFunctionEventsOnly();
+    return *this;
+  }
+
+  /**
+   * Set that the instruction can be used in custom object events.
+   */
+  MultipleInstructionMetadata &SetRelevantForCustomObjectEventsOnly() override {
+    if (condition) condition->SetRelevantForCustomObjectEventsOnly();
+    if (action) action->SetRelevantForCustomObjectEventsOnly();
+    return *this;
+  }
+
   /**
    * \brief Don't use, only here to fulfill Emscripten bindings requirements.
    */
@@ -242,5 +278,3 @@ class GD_CORE_API MultipleInstructionMetadata {
 };
 
 }  // namespace gd
-
-#endif  // MULTIPLEINSTRUCTIONSMETADATA_H

Core/GDCore/Extensions/Metadata/ObjectMetadata.h

@@ -3,8 +3,10 @@
  * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
  * reserved. This project is released under the MIT License.
  */
-#ifndef OBJECTMETADATA_H
-#define OBJECTMETADATA_H
+#pragma once
+
+#include "InstructionOrExpressionContainerMetadata.h"
+
 #include <functional>
 #include <map>
 #include <set>
@@ -32,7 +34,7 @@ namespace gd {
  *
  * \ingroup Events
  */
-class GD_CORE_API ObjectMetadata {
+class GD_CORE_API ObjectMetadata : public InstructionOrExpressionContainerMetadata {
  public:
   /**
    * \brief Construct an object metadata, using a "blueprint" object that will
@@ -57,7 +59,7 @@ 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_,
@@ -79,7 +81,7 @@ class GD_CORE_API ObjectMetadata {
                                         const gd::String& sentence_,
                                         const gd::String& group_,
                                         const gd::String& icon_,
-                                        const gd::String& smallicon_);
+                                        const gd::String& smallicon_) override;
 
   /**
    * \brief Declare a new action as being part of the extension.
@@ -92,7 +94,7 @@ class GD_CORE_API ObjectMetadata {
                                      const gd::String& sentence_,
                                      const gd::String& group_,
                                      const gd::String& icon_,
-                                     const gd::String& smallicon_);
+                                     const gd::String& smallicon_) override;
 
   /**
    * Declare a new condition as being part of the object.
@@ -103,7 +105,7 @@ class GD_CORE_API ObjectMetadata {
                                               const gd::String& sentence_,
                                               const gd::String& group_,
                                               const gd::String& icon_,
-                                              const gd::String& smallicon_);
+                                              const gd::String& smallicon_) override;
 
   /**
    * Declare a new action as being part of the object.
@@ -114,7 +116,7 @@ class GD_CORE_API ObjectMetadata {
                                            const gd::String& sentence_,
                                            const gd::String& group_,
                                            const gd::String& icon_,
-                                           const gd::String& smallicon_);
+                                           const gd::String& smallicon_) override;
 
   /**
    * \brief Declare a new expression as being part of the extension.
@@ -123,7 +125,7 @@ class GD_CORE_API ObjectMetadata {
                                         const gd::String& fullname_,
                                         const gd::String& description_,
                                         const gd::String& group_,
-                                        const gd::String& smallicon_);
+                                        const gd::String& smallicon_) override;
   /**
    * \brief Declare a new string expression as being part of the extension.
    */
@@ -131,7 +133,7 @@ class GD_CORE_API ObjectMetadata {
                                            const gd::String& fullname_,
                                            const gd::String& description_,
                                            const gd::String& group_,
-                                           const gd::String& smallicon_);
+                                           const gd::String& smallicon_) override;
 
   /**
    * \brief Declare a new expression and condition as being part of the
@@ -146,7 +148,7 @@ class GD_CORE_API ObjectMetadata {
       const gd::String& description,
       const gd::String& sentenceName,
       const gd::String& group,
-      const gd::String& icon);
+      const gd::String& icon) override;
 
   /**
    * \brief Declare a new expression, condition and action as being part of the
@@ -163,7 +165,7 @@ class GD_CORE_API ObjectMetadata {
       const gd::String& description,
       const gd::String& sentenceName,
       const gd::String& group,
-      const gd::String& icon);
+      const gd::String& icon) override;
 
   /**
    * \brief Create a new action which is the duplicate of the specified one.
@@ -172,7 +174,7 @@ class GD_CORE_API ObjectMetadata {
    * one.
    */
   gd::InstructionMetadata& AddDuplicatedAction(
-      const gd::String& newActionName, const gd::String& copiedActionName);
+      const gd::String& newActionName, const gd::String& copiedActionName) override;
 
   /**
    * \brief Create a new condition which is the duplicate of the specified one.
@@ -182,23 +184,23 @@ class GD_CORE_API ObjectMetadata {
    */
   gd::InstructionMetadata& AddDuplicatedCondition(
       const gd::String& newConditionName,
-      const gd::String& copiedConditionName);
+      const gd::String& copiedConditionName) override;
 
   /**
    * \brief Set the name shown to the user.
    */
-  ObjectMetadata& SetFullName(const gd::String& fullname_);
+  ObjectMetadata& SetFullName(const gd::String& fullname_) override;
 
   /**
    * \brief Set the description shown to the user.
    */
-  ObjectMetadata& SetDescription(const gd::String& description_);
+  ObjectMetadata& SetDescription(const gd::String& description_) override;
 
   /**
    * \brief Get the help path of the object, relative to the GDevelop
    * documentation root.
    */
-  const gd::String& GetHelpPath() const { return helpPath; }
+  const gd::String& GetHelpPath() const override { return helpPath; }
 
   /**
    * \brief Set the help path of the object, relative to the GDevelop
@@ -207,7 +209,7 @@ class GD_CORE_API ObjectMetadata {
    * The object instructions will have this help path set by
    * default, unless you call SetHelpPath on them.
    */
-  ObjectMetadata& SetHelpPath(const gd::String& path) {
+  ObjectMetadata& SetHelpPath(const gd::String& path) override {
     helpPath = path;
     return *this;
   }
@@ -222,38 +224,34 @@ 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.
+   * \brief The "capabilities" that are offered by through behaviors.
    */
-  const std::set<gd::String>& GetUnsupportedBaseObjectCapabilities() const {
-    return unsupportedBaseObjectCapabilities;
+  const std::set<gd::String>& GetDefaultBehaviors() const {
+    return defaultBehaviorTypes;
   }
 
   /**
-   * \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.
+   * \brief Return true if object has a default behavior of the given type.
    */
-  ObjectMetadata& AddUnsupportedBaseObjectCapability(
-      const gd::String& capability) {
-    unsupportedBaseObjectCapabilities.insert(capability);
+  bool HasDefaultBehavior(const gd::String& behaviorType) const {
+    return defaultBehaviorTypes.find(behaviorType) != defaultBehaviorTypes.end();
+  }
+
+  /**
+   * \brief Add a "capability" that is offered by through a behavior.
+   */
+  ObjectMetadata& AddDefaultBehavior(
+      const gd::String& behaviorType) {
+    defaultBehaviorTypes.insert(behaviorType);
     return *this;
   }
 
-  /**
-   * \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.
-   */
-  bool IsUnsupportedBaseObjectCapability(const gd::String& capability) const {
-    return unsupportedBaseObjectCapabilities.find(capability) != unsupportedBaseObjectCapabilities.end();
-  }
-
-  const gd::String& GetName() const { return name; }
-  const gd::String& GetFullName() const { return fullname; }
+  const gd::String& GetName() const override { return name; }
+  const gd::String& GetFullName() const override { return fullname; }
   const gd::String& GetCategoryFullName() const { return categoryFullName; }
   const gd::String& GetHelpUrl() const { return helpUrl; }
-  const gd::String& GetDescription() const { return description; }
-  const gd::String& GetIconFilename() const { return iconFilename; }
+  const gd::String& GetDescription() const override { return description; }
+  const gd::String& GetIconFilename() const override { return iconFilename; }
 
   /**
    * \brief Set the URL pointing to the help page about this object
@@ -267,33 +265,33 @@ class GD_CORE_API ObjectMetadata {
    * \note The requirement may vary depending on the platform: Most of the time,
    * the include file contains the declaration of the object.
    */
-  ObjectMetadata& SetIncludeFile(const gd::String& includeFile);
+  ObjectMetadata& SetIncludeFile(const gd::String& includeFile) override;
 
   /**
    * \brief Add a file to the already existing include files.
    */
-  ObjectMetadata& AddIncludeFile(const gd::String& includeFile);
+  ObjectMetadata& AddIncludeFile(const gd::String& includeFile) override;
 
   /**
    * \brief Return a reference to a map containing the names of the actions
    * (as keys) and the metadata associated with (as values).
    */
-  std::map<gd::String, gd::InstructionMetadata>& GetAllActions() { return actionsInfos; };
+  std::map<gd::String, gd::InstructionMetadata>& GetAllActions() override { return actionsInfos; };
 
   /**
    * \see gd::PlatformExtension::GetAllActions
    */
-  std::map<gd::String, gd::InstructionMetadata>& GetAllConditions() { return conditionsInfos; };
+  std::map<gd::String, gd::InstructionMetadata>& GetAllConditions() override { return conditionsInfos; };
 
   /**
    * \see gd::PlatformExtension::GetAllActions
    */
-  std::map<gd::String, gd::ExpressionMetadata>& GetAllExpressions() { return expressionsInfos; };
+  std::map<gd::String, gd::ExpressionMetadata>& GetAllExpressions() override { return expressionsInfos; };
 
   /**
    * \see gd::PlatformExtension::GetAllActions
    */
-  std::map<gd::String, gd::ExpressionMetadata>& GetAllStrExpressions() { return strExpressionsInfos; };
+  std::map<gd::String, gd::ExpressionMetadata>& GetAllStrExpressions() override { return strExpressionsInfos; };
 
   /**
    * \brief Set the object to be hidden in the IDE.
@@ -329,7 +327,7 @@ class GD_CORE_API ObjectMetadata {
   gd::String description;
   gd::String iconFilename;
   gd::String categoryFullName;
-  std::set<gd::String> unsupportedBaseObjectCapabilities;
+  std::set<gd::String> defaultBehaviorTypes;
   bool hidden = false;
 
   std::shared_ptr<gd::ObjectConfiguration>
@@ -341,4 +339,3 @@ class GD_CORE_API ObjectMetadata {
 };
 
 }  // namespace gd
-#endif  // OBJECTMETADATA_H

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/ValueTypeMetadata.cpp

@@ -35,17 +35,40 @@ 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";

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 +196,23 @@ 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.

Core/GDCore/Extensions/PlatformExtension.cpp

@@ -273,25 +273,6 @@ gd::BehaviorMetadata& PlatformExtension::AddBehavior(
   return behaviorsInfo[nameWithNamespace];
 }
 
-gd::BehaviorMetadata& PlatformExtension::AddEventsBasedBehavior(
-    const gd::String& name,
-    const gd::String& fullname,
-    const gd::String& description,
-    const gd::String& group,
-    const gd::String& icon24x24) {
-  gd::String nameWithNamespace = GetNameSpace() + name;
-  behaviorsInfo[nameWithNamespace] = BehaviorMetadata(GetNameSpace(),
-                                                      nameWithNamespace,
-                                                      fullname,
-                                                      // Default name is the name
-                                                      name,
-                                                      description,
-                                                      group,
-                                                      icon24x24)
-                                         .SetHelpPath(GetHelpPath());
-  return behaviorsInfo[nameWithNamespace];
-}
-
 gd::EffectMetadata& PlatformExtension::AddEffect(const gd::String& name) {
   gd::String nameWithNamespace = GetNameSpace() + name;
   effectsMetadata[nameWithNamespace] = EffectMetadata(nameWithNamespace);
@@ -653,7 +634,7 @@ void PlatformExtension::StripUnimplementedInstructionsAndExpressions() {
            GetAllActions().begin();
        it != GetAllActions().end();) {
     if (it->second.codeExtraInformation.functionCallName.empty() &&
-        !it->second.codeExtraInformation.HasCustomCodeGenerator()) {
+        !it->second.HasCustomCodeGenerator()) {
       GetAllActions().erase(it++);
     } else
       ++it;
@@ -663,7 +644,7 @@ void PlatformExtension::StripUnimplementedInstructionsAndExpressions() {
            GetAllConditions().begin();
        it != GetAllConditions().end();) {
     if (it->second.codeExtraInformation.functionCallName.empty() &&
-        !it->second.codeExtraInformation.HasCustomCodeGenerator()) {
+        !it->second.HasCustomCodeGenerator()) {
       GetAllConditions().erase(it++);
     } else
       ++it;
@@ -673,7 +654,7 @@ void PlatformExtension::StripUnimplementedInstructionsAndExpressions() {
            GetAllExpressions().begin();
        it != GetAllExpressions().end();) {
     if (it->second.codeExtraInformation.functionCallName.empty() &&
-        !it->second.codeExtraInformation.HasCustomCodeGenerator()) {
+        !it->second.HasCustomCodeGenerator()) {
       GetAllExpressions().erase(it++);
     } else
       ++it;
@@ -683,7 +664,7 @@ void PlatformExtension::StripUnimplementedInstructionsAndExpressions() {
            GetAllStrExpressions().begin();
        it != GetAllStrExpressions().end();) {
     if (it->second.codeExtraInformation.functionCallName.empty() &&
-        !it->second.codeExtraInformation.HasCustomCodeGenerator()) {
+        !it->second.HasCustomCodeGenerator()) {
       GetAllStrExpressions().erase(it++);
     } else
       ++it;
@@ -699,7 +680,7 @@ void PlatformExtension::StripUnimplementedInstructionsAndExpressions() {
              obj.actionsInfos.begin();
          it != obj.actionsInfos.end();) {
       if (it->second.codeExtraInformation.functionCallName.empty() &&
-          !it->second.codeExtraInformation.HasCustomCodeGenerator()) {
+          !it->second.HasCustomCodeGenerator()) {
         obj.actionsInfos.erase(it++);
       } else
         ++it;
@@ -709,7 +690,7 @@ void PlatformExtension::StripUnimplementedInstructionsAndExpressions() {
              obj.conditionsInfos.begin();
          it != obj.conditionsInfos.end();) {
       if (it->second.codeExtraInformation.functionCallName.empty() &&
-          !it->second.codeExtraInformation.HasCustomCodeGenerator()) {
+          !it->second.HasCustomCodeGenerator()) {
         obj.conditionsInfos.erase(it++);
       } else
         ++it;
@@ -719,7 +700,7 @@ void PlatformExtension::StripUnimplementedInstructionsAndExpressions() {
              obj.expressionsInfos.begin();
          it != obj.expressionsInfos.end();) {
       if (it->second.codeExtraInformation.functionCallName.empty() &&
-          !it->second.codeExtraInformation.HasCustomCodeGenerator()) {
+          !it->second.HasCustomCodeGenerator()) {
         obj.expressionsInfos.erase(it++);
       } else
         ++it;
@@ -729,7 +710,7 @@ void PlatformExtension::StripUnimplementedInstructionsAndExpressions() {
              obj.strExpressionsInfos.begin();
          it != obj.strExpressionsInfos.end();) {
       if (it->second.codeExtraInformation.functionCallName.empty() &&
-          !it->second.codeExtraInformation.HasCustomCodeGenerator()) {
+          !it->second.HasCustomCodeGenerator()) {
         obj.strExpressionsInfos.erase(it++);
       } else
         ++it;
@@ -746,7 +727,7 @@ void PlatformExtension::StripUnimplementedInstructionsAndExpressions() {
              obj.actionsInfos.begin();
          it != obj.actionsInfos.end();) {
       if (it->second.codeExtraInformation.functionCallName.empty() &&
-          !it->second.codeExtraInformation.HasCustomCodeGenerator()) {
+          !it->second.HasCustomCodeGenerator()) {
         obj.actionsInfos.erase(it++);
       } else
         ++it;
@@ -756,7 +737,7 @@ void PlatformExtension::StripUnimplementedInstructionsAndExpressions() {
              obj.conditionsInfos.begin();
          it != obj.conditionsInfos.end();) {
       if (it->second.codeExtraInformation.functionCallName.empty() &&
-          !it->second.codeExtraInformation.HasCustomCodeGenerator()) {
+          !it->second.HasCustomCodeGenerator()) {
         obj.conditionsInfos.erase(it++);
       } else
         ++it;
@@ -766,7 +747,7 @@ void PlatformExtension::StripUnimplementedInstructionsAndExpressions() {
              obj.expressionsInfos.begin();
          it != obj.expressionsInfos.end();) {
       if (it->second.codeExtraInformation.functionCallName.empty() &&
-          !it->second.codeExtraInformation.HasCustomCodeGenerator()) {
+          !it->second.HasCustomCodeGenerator()) {
         obj.expressionsInfos.erase(it++);
       } else
         ++it;
@@ -776,7 +757,7 @@ void PlatformExtension::StripUnimplementedInstructionsAndExpressions() {
              obj.strExpressionsInfos.begin();
          it != obj.strExpressionsInfos.end();) {
       if (it->second.codeExtraInformation.functionCallName.empty() &&
-          !it->second.codeExtraInformation.HasCustomCodeGenerator()) {
+          !it->second.HasCustomCodeGenerator()) {
         obj.strExpressionsInfos.erase(it++);
       } else
         ++it;

Core/GDCore/Extensions/PlatformExtension.h

@@ -421,6 +421,32 @@ class GD_CORE_API PlatformExtension {
    */
   const gd::String& GetIconUrl() const { return iconUrl; }
 
+  /**
+   * \brief Return keywords that help search engines find this extension.
+   */
+  const std::vector<gd::String>& GetTags() const { return tags; }
+
+  /**
+   * \brief Set keywords that help search engines find this extension.
+   */
+  PlatformExtension& SetTags(const gd::String& csvTags) {
+    tags.clear();
+    tags = csvTags.Split(',');
+    for (size_t i = 0; i < tags.size(); i++)
+    {
+      tags[i] = tags[i].Trim().LowerCase();
+    }
+    return *this;
+  }
+
+  /**
+   * \brief Add a keyword that help search engines find this extension.
+   */
+  PlatformExtension& AddTag(const gd::String& tag) {
+    tags.push_back(tag);
+    return *this;
+  }
+
   /**
    * \brief Check if the extension is flagged as being deprecated.
    */
@@ -661,6 +687,7 @@ private:
   gd::String helpPath;  ///< The relative path to the help for this extension in
                         ///< the documentation.
   gd::String iconUrl;   ///< The URL to the icon to be shown for this extension.
+  std::vector<gd::String> tags;
 
   std::map<gd::String, gd::ObjectMetadata> objectsInfos;
   std::map<gd::String, gd::BehaviorMetadata> behaviorsInfo;

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/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/BehaviorDefaultFlagClearer.cpp

@@ -0,0 +1,23 @@
+#include "BehaviorDefaultFlagClearer.h"
+
+#include "GDCore/Events/Instruction.h"
+#include "GDCore/Extensions/Metadata/MetadataProvider.h"
+#include "GDCore/Extensions/PlatformExtension.h"
+#include "GDCore/IDE/WholeProjectRefactorer.h"
+#include "GDCore/IDE/Events/ExpressionTypeFinder.h"
+#include "GDCore/Project/Behavior.h"
+#include "GDCore/Project/Object.h"
+#include "GDCore/Project/Project.h"
+
+namespace gd {
+
+void BehaviorDefaultFlagClearer::DoVisitObject(gd::Object& object) {
+};
+
+void BehaviorDefaultFlagClearer::DoVisitBehavior(gd::Behavior& behavior) {
+  behavior.SetDefaultBehavior(false);
+};
+
+BehaviorDefaultFlagClearer::~BehaviorDefaultFlagClearer() {}
+
+}  // namespace gd

Core/GDCore/IDE/Events/BehaviorDefaultFlagClearer.h

@@ -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.
+ */
+
+#pragma once
+#include <set>
+
+#include "GDCore/IDE/Project/ArbitraryObjectsWorker.h"
+#include "GDCore/String.h"
+
+namespace gd {
+class Object;
+class Behavior;
+}  // namespace gd
+
+namespace gd {
+
+/**
+ * @brief This is used for project exports to keep default behaviors in
+ * serialized data used by Runtime.
+ */
+class GD_CORE_API BehaviorDefaultFlagClearer : public ArbitraryObjectsWorker {
+ public:
+  BehaviorDefaultFlagClearer() {};
+  virtual ~BehaviorDefaultFlagClearer();
+
+ private:
+  void DoVisitObject(gd::Object& object) override;
+  void DoVisitBehavior(gd::Behavior& behavior) override;
+};
+
+};  // namespace gd

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/EventsRefactorer.cpp

@@ -555,6 +555,22 @@ void EventsRefactorer::RemoveObjectInEvents(const gd::Platform& platform,
   }
 }
 
+gd::String ReplaceAllOccurrencesCaseInsensitive(gd::String context,
+                                                const gd::String& from,
+                                                const gd::String& to) {
+  size_t lookHere = 0;
+  size_t foundHere;
+  size_t fromSize = from.size();
+  size_t toSize = to.size();
+  while ((foundHere = context.FindCaseInsensitive(from, lookHere)) !=
+         gd::String::npos) {
+    context.replace(foundHere, fromSize, to);
+    lookHere = foundHere + toSize;
+  }
+
+  return context;
+}
+
 std::vector<EventsSearchResult> EventsRefactorer::ReplaceStringInEvents(
     gd::ObjectsContainer& project,
     gd::ObjectsContainer& layout,
@@ -570,6 +586,32 @@ std::vector<EventsSearchResult> EventsRefactorer::ReplaceStringInEvents(
 
   for (std::size_t i = 0; i < events.size(); ++i) {
     bool eventModified = false;
+
+    std::vector<gd::Expression*> allObjectExpressions =
+        events[i].GetAllObjectExpressions();
+    for (std::size_t j = 0; j < allObjectExpressions.size(); ++j) {
+      gd::String newExpressionPlainString =
+          matchCase ? allObjectExpressions[j]->GetPlainString().FindAndReplace(
+                          toReplace, newString, true)
+                    : ReplaceAllOccurrencesCaseInsensitive(
+                          allObjectExpressions[j]->GetPlainString(),
+                          toReplace,
+                          newString);
+
+      if (newExpressionPlainString !=
+          allObjectExpressions[j]->GetPlainString()) {
+        *allObjectExpressions[j] = gd::Expression(newExpressionPlainString);
+
+        if (!eventModified) {
+          modifiedEvents.push_back(EventsSearchResult(
+              std::weak_ptr<gd::BaseEvent>(events.GetEventSmartPtr(i)),
+              &events,
+              i));
+          eventModified = true;
+        }
+      }
+    }
+
     if (inConditions) {
       vector<gd::InstructionsList*> conditionsVectors =
           events[i].GetAllConditionsVectors();
@@ -642,22 +684,6 @@ std::vector<EventsSearchResult> EventsRefactorer::ReplaceStringInEvents(
   return modifiedEvents;
 }
 
-gd::String ReplaceAllOccurencesCaseUnsensitive(gd::String context,
-                                               gd::String from,
-                                               const gd::String& to) {
-  size_t lookHere = 0;
-  size_t foundHere;
-  size_t fromSize = from.size();
-  size_t toSize = to.size();
-  while ((foundHere = context.FindCaseInsensitive(from, lookHere)) !=
-         gd::String::npos) {
-    context.replace(foundHere, fromSize, to);
-    lookHere = foundHere + toSize;
-  }
-
-  return context;
-}
-
 bool EventsRefactorer::ReplaceStringInActions(gd::ObjectsContainer& project,
                                               gd::ObjectsContainer& layout,
                                               gd::InstructionsList& actions,
@@ -673,7 +699,7 @@ 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 +739,7 @@ bool EventsRefactorer::ReplaceStringInConditions(
                           .GetParameter(pNb)
                           .GetPlainString()
                           .FindAndReplace(toReplace, newString, true)
-                    : ReplaceAllOccurencesCaseUnsensitive(
+                    : ReplaceAllOccurrencesCaseInsensitive(
                           conditions[cId].GetParameter(pNb).GetPlainString(),
                           toReplace,
                           newString);
@@ -749,7 +775,7 @@ 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);
   }
@@ -789,6 +815,24 @@ vector<EventsSearchResult> EventsRefactorer::SearchInEvents(
   for (std::size_t i = 0; i < events.size(); ++i) {
     bool eventAddedInResults = false;
 
+    std::vector<gd::Expression*> allObjectExpressions =
+        events[i].GetAllObjectExpressions();
+    for (std::size_t j = 0; j < allObjectExpressions.size(); ++j) {
+      size_t foundPosition =
+          matchCase
+              ? allObjectExpressions[j]->GetPlainString().find(search)
+              : allObjectExpressions[j]->GetPlainString().FindCaseInsensitive(
+                    search);
+
+      if (foundPosition != gd::String::npos && !eventAddedInResults) {
+        results.push_back(EventsSearchResult(
+            std::weak_ptr<gd::BaseEvent>(events.GetEventSmartPtr(i)),
+            &events,
+            i));
+        eventAddedInResults = true;
+      }
+    }
+
     if (inConditions) {
       vector<gd::InstructionsList*> conditionsVectors =
           events[i].GetAllConditionsVectors();
@@ -803,6 +847,7 @@ vector<EventsSearchResult> EventsRefactorer::SearchInEvents(
               std::weak_ptr<gd::BaseEvent>(events.GetEventSmartPtr(i)),
               &events,
               i));
+          eventAddedInResults = true;
         }
       }
     }
@@ -820,6 +865,7 @@ vector<EventsSearchResult> EventsRefactorer::SearchInEvents(
               std::weak_ptr<gd::BaseEvent>(events.GetEventSmartPtr(i)),
               &events,
               i));
+          eventAddedInResults = true;
         }
       }
     }

Core/GDCore/IDE/Events/ExpressionValidator.cpp

@@ -77,24 +77,34 @@ 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 (gd::MetadataProvider::IsBadExpressionMetadata(metadata)) {
     RaiseError(
@@ -115,8 +125,8 @@ 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 +141,8 @@ 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 +182,7 @@ 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 +226,7 @@ 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/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 +1,214 @@
+/*
+ * 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") {
+            if (parameterNode->location.GetEndPosition() -
+                    parameterNode->location.GetStartPosition() <
+                2) {
+              // This is either the base layer or an invalid layer name.
+              // Keep it as is.
+              lastLayerName = expressionPlainString.substr(
+                  parameterNode->location.GetStartPosition(),
+                  parameterNode->location.GetEndPosition() -
+                      parameterNode->location.GetStartPosition());
+            } else {
+              // Remove quotes, so it can be compared to the layer name.
+              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") {
+          if (parameterValue.GetPlainString().length() < 2) {
+            // This is either the base layer or an invalid layer name.
+            // Keep it as is.
+            lastLayerName = parameterValue.GetPlainString();
+          } else {
+            // Remove quotes, so it can be compared to the layer name.
+            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

@@ -82,7 +82,7 @@ bool UsedExtensionsFinder::DoVisitInstruction(gd::Instruction& instruction,
 
 // Expressions scanner
 
-// Ignore litterals nodes
+// Ignore literals nodes
 void UsedExtensionsFinder::OnVisitNumberNode(NumberNode& node){};
 void UsedExtensionsFinder::OnVisitTextNode(TextNode& node){};
 

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/ArbitraryResourceWorker.cpp

@@ -17,9 +17,11 @@
 #include "GDCore/Extensions/Metadata/ParameterMetadataTools.h"
 #include "GDCore/Extensions/Platform.h"
 #include "GDCore/Extensions/PlatformExtension.h"
-#include "GDCore/IDE/Events/ArbitraryEventsWorker.h"
 #include "GDCore/Project/Project.h"
 #include "GDCore/Project/ResourcesManager.h"
+#include "GDCore/Project/Effect.h"
+#include "GDCore/Tools/Log.h"
+#include "GDCore/IDE/ResourceExposer.h"
 
 using namespace std;
 
@@ -45,6 +47,11 @@ void ArbitraryResourceWorker::ExposeTileset(gd::String& tilesetName){
     // 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.
@@ -66,7 +73,7 @@ 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);
@@ -83,7 +90,7 @@ 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);
@@ -126,27 +133,9 @@ void ArbitraryResourceWorker::ExposeEmbeddeds(gd::String& resourceName) {
           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);
-          }
+          ExposeResourceWithType(targetResource.GetKind(), potentiallyUpdatedTargetResourceName);
 
           if (potentiallyUpdatedTargetResourceName != targetResourceName) {
             // The resource name was renamed. Also update the mapping.
@@ -163,6 +152,48 @@ void ArbitraryResourceWorker::ExposeEmbeddeds(gd::String& resourceName) {
   }
 }
 
+void ArbitraryResourceWorker::ExposeResourceWithType(
+    const gd::String &resourceType, gd::String &resourceName) {
+  if (resourceType == "image") {
+    ExposeImage(resourceName);
+    return;
+  }
+  if (resourceType == "model3D") {
+    ExposeModel3D(resourceName);
+    return;
+  }
+  if (resourceType == "audio") {
+    ExposeAudio(resourceName);
+    return;
+  }
+  if (resourceType == "font") {
+    ExposeFont(resourceName);
+    return;
+  }
+  if (resourceType == "bitmapFont") {
+    ExposeBitmapFont(resourceName);
+    return;
+  }
+  if (resourceType == "tilemap") {
+    ExposeTilemap(resourceName);
+    return;
+  }
+  if (resourceType == "tileset") {
+    ExposeTileset(resourceName);
+    return;
+  }
+  if (resourceType == "json") {
+    ExposeJson(resourceName);
+    return;
+  }
+  if (resourceType == "video") {
+    ExposeVideo(resourceName);
+    return;
+  }
+  gd::LogError("Unexpected resource type: " + resourceType + " for: " + resourceName);
+  return;
+}
+
 void ArbitraryResourceWorker::ExposeResource(gd::Resource& resource) {
   if (!resource.UseFile()) return;
 
@@ -173,82 +204,98 @@ void ArbitraryResourceWorker::ExposeResource(gd::Resource& resource) {
 
 ArbitraryResourceWorker::~ArbitraryResourceWorker() {}
 
-/**
- * Launch the specified resource worker on every resource referenced in the
- * events.
- */
-class ResourceWorkerInEventsWorker : public ArbitraryEventsWorker {
- public:
-  ResourceWorkerInEventsWorker(const gd::Project& project_,
-                               gd::ArbitraryResourceWorker& worker_)
-      : project(project_), worker(worker_){};
-  virtual ~ResourceWorkerInEventsWorker(){};
+bool ResourceWorkerInEventsWorker::DoVisitInstruction(gd::Instruction& instruction, bool isCondition) {
+  const auto& platform = project.GetCurrentPlatform();
+  const auto& metadata = isCondition
+                              ? gd::MetadataProvider::GetConditionMetadata(
+                                    platform, instruction.GetType())
+                              : gd::MetadataProvider::GetActionMetadata(
+                                    platform, instruction.GetType());
 
- private:
-  bool DoVisitInstruction(gd::Instruction& instruction, bool isCondition) {
-    const auto& platform = project.GetCurrentPlatform();
-    const auto& metadata = isCondition
-                               ? gd::MetadataProvider::GetConditionMetadata(
-                                     platform, instruction.GetType())
-                               : gd::MetadataProvider::GetActionMetadata(
-                                     platform, instruction.GetType());
+  gd::ParameterMetadataTools::IterateOverParametersWithIndex(
+      instruction.GetParameters(),
+      metadata.GetParameters(),
+      [this, &instruction](const gd::ParameterMetadata& parameterMetadata,
+                            const gd::Expression& parameterExpression,
+                            size_t parameterIndex,
+                            const gd::String& lastObjectName) {
+        const String& parameterValue = parameterExpression.GetPlainString();
+        if (parameterMetadata.GetType() ==
+                "police" ||  // Should be renamed fontResource
+            parameterMetadata.GetType() == "fontResource") {
+          gd::String updatedParameterValue = parameterValue;
+          worker.ExposeFont(updatedParameterValue);
+          instruction.SetParameter(parameterIndex, updatedParameterValue);
+        } else if (parameterMetadata.GetType() == "soundfile" ||
+                    parameterMetadata.GetType() ==
+                        "musicfile") {  // Should be renamed audioResource
+          gd::String updatedParameterValue = parameterValue;
+          worker.ExposeAudio(updatedParameterValue);
+          instruction.SetParameter(parameterIndex, updatedParameterValue);
+        } else if (parameterMetadata.GetType() == "bitmapFontResource") {
+          gd::String updatedParameterValue = parameterValue;
+          worker.ExposeBitmapFont(updatedParameterValue);
+          instruction.SetParameter(parameterIndex, updatedParameterValue);
+        } else if (parameterMetadata.GetType() == "imageResource") {
+          gd::String updatedParameterValue = parameterValue;
+          worker.ExposeImage(updatedParameterValue);
+          instruction.SetParameter(parameterIndex, updatedParameterValue);
+        } else if (parameterMetadata.GetType() == "jsonResource") {
+          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);
+        }
+      });
 
-    gd::ParameterMetadataTools::IterateOverParametersWithIndex(
-        instruction.GetParameters(),
-        metadata.GetParameters(),
-        [this, &instruction](const gd::ParameterMetadata& parameterMetadata,
-                             const gd::Expression& parameterExpression,
-                             size_t parameterIndex,
-                             const gd::String& lastObjectName) {
-          const String& parameterValue = parameterExpression.GetPlainString();
-          if (parameterMetadata.GetType() ==
-                  "police" ||  // Should be renamed fontResource
-              parameterMetadata.GetType() == "fontResource") {
-            gd::String updatedParameterValue = parameterValue;
-            worker.ExposeFont(updatedParameterValue);
-            instruction.SetParameter(parameterIndex, updatedParameterValue);
-          } else if (parameterMetadata.GetType() == "soundfile" ||
-                     parameterMetadata.GetType() ==
-                         "musicfile") {  // Should be renamed audioResource
-            gd::String updatedParameterValue = parameterValue;
-            worker.ExposeAudio(updatedParameterValue);
-            instruction.SetParameter(parameterIndex, updatedParameterValue);
-          } else if (parameterMetadata.GetType() == "bitmapFontResource") {
-            gd::String updatedParameterValue = parameterValue;
-            worker.ExposeBitmapFont(updatedParameterValue);
-            instruction.SetParameter(parameterIndex, updatedParameterValue);
-          } else if (parameterMetadata.GetType() == "imageResource") {
-            gd::String updatedParameterValue = parameterValue;
-            worker.ExposeImage(updatedParameterValue);
-            instruction.SetParameter(parameterIndex, updatedParameterValue);
-          } else if (parameterMetadata.GetType() == "jsonResource") {
-            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);
-          }
-        });
-
-    return false;
-  };
-
-  const gd::Project& project;
-  gd::ArbitraryResourceWorker& worker;
+  return false;
 };
 
 void LaunchResourceWorkerOnEvents(const gd::Project& project,
                                   gd::EventsList& events,
                                   gd::ArbitraryResourceWorker& worker) {
-  ResourceWorkerInEventsWorker eventsWorker(project, worker);
+  gd::ResourceWorkerInEventsWorker eventsWorker(project, worker);
   eventsWorker.Launch(events);
 }
 
+gd::ResourceWorkerInEventsWorker
+GetResourceWorkerOnEvents(const gd::Project &project,
+                          gd::ArbitraryResourceWorker &worker) {
+  gd::ResourceWorkerInEventsWorker eventsWorker(project, worker);
+  return eventsWorker;
+}
+
+void ResourceWorkerInObjectsWorker::DoVisitObject(gd::Object &object) {
+  object.GetConfiguration().ExposeResources(worker);
+  auto& effects = object.GetEffects();
+  for (size_t effectIndex = 0; effectIndex < effects.GetEffectsCount(); effectIndex++)
+  {
+    auto& effect = effects.GetEffect(effectIndex);
+    gd::ResourceExposer::ExposeEffectResources(project.GetCurrentPlatform(), effect, worker);
+  }
+};
+
+void ResourceWorkerInObjectsWorker::DoVisitBehavior(gd::Behavior &behavior){
+    // TODO Allow behaviors to expose resources
+};
+
+gd::ResourceWorkerInObjectsWorker
+GetResourceWorkerOnObjects(const gd::Project &project,
+                           gd::ArbitraryResourceWorker &worker) {
+  gd::ResourceWorkerInObjectsWorker eventsWorker(project, worker);
+  return eventsWorker;
+}
+
 }  // namespace gd
 #endif

Core/GDCore/IDE/Project/ArbitraryResourceWorker.h

@@ -4,13 +4,14 @@
  * reserved. This project is released under the MIT License.
  */
 
-#ifndef ARBITRARYRESOURCEWORKER_H
-#define ARBITRARYRESOURCEWORKER_H
+#pragma once
 
 #include <map>
 #include <memory>
 #include <vector>
 #include "GDCore/String.h"
+#include "GDCore/IDE/Events/ArbitraryEventsWorker.h"
+#include "GDCore/IDE/Project/ArbitraryObjectsWorker.h"
 namespace gd {
 class BaseEvent;
 }
@@ -53,6 +54,11 @@ class GD_CORE_API ArbitraryResourceWorker {
    */
   void ExposeResources(gd::ResourcesManager *resourcesManager);
 
+  /**
+   * \brief Expose a resource from a given type.
+   */
+  void ExposeResourceWithType(const gd::String& resourceType, gd::String& resourceName);
+
   /**
    * \brief Expose an image, which is always a reference to a "image" resource.
    */
@@ -85,6 +91,11 @@ class GD_CORE_API ArbitraryResourceWorker {
    */
   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.
    */
@@ -127,18 +138,47 @@ class GD_CORE_API ArbitraryResourceWorker {
 };
 
 /**
- * Tool function iterating over each event and calling
- * Expose(Actions/Conditions)Resources for each actions and conditions with the
- * ArbitraryResourceWorker passed as argument.
- *
- * \see gd::ArbitraryResourceWorker
- * \ingroup IDE
+ * Launch the specified resource worker on every resource referenced in the
+ * events.
  */
-void GD_CORE_API
-LaunchResourceWorkerOnEvents(const gd::Project &project,
-                             gd::EventsList &events,
-                             gd::ArbitraryResourceWorker &worker);
+class ResourceWorkerInEventsWorker : public gd::ArbitraryEventsWorker {
+public:
+  ResourceWorkerInEventsWorker(const gd::Project &project_,
+                               gd::ArbitraryResourceWorker &worker_)
+      : project(project_), worker(worker_){};
+  virtual ~ResourceWorkerInEventsWorker(){};
+
+private:
+  bool DoVisitInstruction(gd::Instruction &instruction,
+                          bool isCondition) override;
+
+  const gd::Project &project;
+  gd::ArbitraryResourceWorker &worker;
+};
+
+ResourceWorkerInEventsWorker GD_CORE_API GetResourceWorkerOnEvents(
+    const gd::Project &project, gd::ArbitraryResourceWorker &worker);
+
+/**
+ * Launch the specified resource worker on every resource referenced in the
+ * objects.
+ */
+class GD_CORE_API ResourceWorkerInObjectsWorker
+    : public gd::ArbitraryObjectsWorker {
+public:
+  ResourceWorkerInObjectsWorker(const gd::Project &project_, gd::ArbitraryResourceWorker &worker_)
+      : project(project_), worker(worker_){};
+  ~ResourceWorkerInObjectsWorker() {}
+
+private:
+  void DoVisitObject(gd::Object &object) override;
+  void DoVisitBehavior(gd::Behavior &behavior) override;
+
+  const gd::Project &project;
+  gd::ArbitraryResourceWorker &worker;
+};
+
+gd::ResourceWorkerInObjectsWorker GD_CORE_API
+GetResourceWorkerOnObjects(const gd::Project &project, gd::ArbitraryResourceWorker &worker);
 
 }  // namespace gd
-
-#endif  // ARBITRARYRESOURCEWORKER_H

Core/GDCore/IDE/Project/ProjectResourcesAdder.cpp

@@ -9,6 +9,7 @@
 #include "GDCore/Project/Project.h"
 #include "GDCore/Tools/Localization.h"
 #include "GDCore/Tools/Log.h"
+#include "GDCore/IDE/ResourceExposer.h"
 
 using namespace std;
 
@@ -19,7 +20,7 @@ std::vector<gd::String> ProjectResourcesAdder::GetAllUseless(
   std::vector<gd::String> unusedResources;
   // Search for resources used in the project
   gd::ResourcesInUseHelper resourcesInUse;
-  project.ExposeResources(resourcesInUse);
+  gd::ResourceExposer::ExposeWholeProjectResources(project, resourcesInUse);
   std::set<gd::String>& usedResources = resourcesInUse.GetAll(resourceType);
 
   // Search all resources not used

Core/GDCore/IDE/Project/ProjectResourcesCopier.cpp

@@ -12,6 +12,7 @@
 #include "GDCore/Project/Project.h"
 #include "GDCore/Tools/Localization.h"
 #include "GDCore/Tools/Log.h"
+#include "GDCore/IDE/ResourceExposer.h"
 
 using namespace std;
 
@@ -26,10 +27,10 @@ bool ProjectResourcesCopier::CopyAllResourcesTo(
     bool preserveDirectoryStructure) {
   // Check if there are some resources with absolute filenames
   gd::ResourcesAbsolutePathChecker absolutePathChecker(fs);
-  originalProject.ExposeResources(absolutePathChecker);
+  gd::ResourceExposer::ExposeWholeProjectResources(originalProject, absolutePathChecker);
 
   auto projectDirectory = fs.DirNameFrom(originalProject.GetProjectFile());
-  std::cout << "Copying all ressources from " << projectDirectory << " to "
+  std::cout << "Copying all resources from " << projectDirectory << " to "
             << destinationDirectory << "..." << std::endl;
 
   // Get the resources to be copied
@@ -41,10 +42,10 @@ bool ProjectResourcesCopier::CopyAllResourcesTo(
       preserveAbsoluteFilenames);
 
   if (updateOriginalProject) {
-    originalProject.ExposeResources(resourcesMergingHelper);
+    gd::ResourceExposer::ExposeWholeProjectResources(originalProject, resourcesMergingHelper);
   } else {
     std::shared_ptr<gd::Project> project(new gd::Project(originalProject));
-    project->ExposeResources(resourcesMergingHelper);
+    gd::ResourceExposer::ExposeWholeProjectResources(*project, resourcesMergingHelper);
   }
 
   // Copy resources

Core/GDCore/IDE/Project/ResourcesInUseHelper.h

@@ -13,6 +13,7 @@
 
 #include "GDCore/IDE/Project/ArbitraryResourceWorker.h"
 #include "GDCore/String.h"
+#include "GDCore/IDE/ResourceExposer.h"
 
 namespace gd {
 
@@ -23,7 +24,7 @@ namespace gd {
  * Usage example:
 \code
 gd::ResourcesInUseHelper resourcesInUse;
-project.ExposeResources(resourcesInUse);
+gd::ResourceExposer::ExposeWholeProjectResources(project, resourcesInUse);
 
 //Get a set with the name of all images in the project:
 std::set<gd::String> & usedImages = resourcesInUse.GetAllImages();
@@ -44,6 +45,7 @@ class ResourcesInUseHelper : public gd::ArbitraryResourceWorker {
   std::set<gd::String>& GetAllTilesets() { return GetAll("tileset"); };
   std::set<gd::String>& GetAllVideos() { return GetAll("video"); };
   std::set<gd::String>& GetAllBitmapFonts() { return GetAll("bitmapFont"); };
+  std::set<gd::String>& GetAll3DModels() { return GetAll("model3D"); };
   std::set<gd::String>& GetAll(const gd::String& resourceType) {
     if (resourceType == "image") return allImages;
     if (resourceType == "audio") return allAudios;
@@ -53,6 +55,7 @@ class ResourcesInUseHelper : public gd::ArbitraryResourceWorker {
     if (resourceType == "tileset") return allTilesets;
     if (resourceType == "video") return allVideos;
     if (resourceType == "bitmapFont") return allBitmapFonts;
+    if (resourceType == "model3D") return allModel3Ds;
 
     return emptyResources;
   };
@@ -84,6 +87,9 @@ class ResourcesInUseHelper : public gd::ArbitraryResourceWorker {
   virtual void ExposeBitmapFont(gd::String& bitmapFontResourceName) override {
     allBitmapFonts.insert(bitmapFontResourceName);
   };
+  virtual void ExposeModel3D(gd::String& resourceName) override {
+    allModel3Ds.insert(resourceName);
+  };
 
  protected:
   std::set<gd::String> allImages;
@@ -94,6 +100,7 @@ class ResourcesInUseHelper : public gd::ArbitraryResourceWorker {
   std::set<gd::String> allTilesets;
   std::set<gd::String> allVideos;
   std::set<gd::String> allBitmapFonts;
+  std::set<gd::String> allModel3Ds;
   std::set<gd::String> emptyResources;
 };
 

Core/GDCore/IDE/Project/ResourcesRenamer.h

@@ -59,6 +59,9 @@ class ResourcesRenamer : public gd::ArbitraryResourceWorker {
   virtual void ExposeBitmapFont(gd::String& bitmapFontName) override {
     RenameIfNeeded(bitmapFontName);
   };
+  virtual void ExposeModel3D(gd::String& resourceName) override {
+    RenameIfNeeded(resourceName);
+  };
 
  private:
   void RenameIfNeeded(gd::String& resourceName) {