Revert "pull AccessibleBuffer out of AccessibilityManager (#4400)"

This reverts commit 6daadc4c55.

.agents/skills/benchmark/SKILL.md

@@ -1,28 +0,0 @@
----
-name: benchmark
-description: Run and author benchmark tests in xterm.js. Use when editing benchmark files, working in `*.benchmark.ts`, or when asked how to run the full benchmark suite, a single benchmark file, or a single benchmark case.
----
-
-# Benchmark Run Instructions
-
-## Running Benchmarks
-
-- Full suite: `npm run benchmark`
-- Single benchmark file:
-  - Tree: `npm run benchmark -- -t out-test/benchmark/Event.benchmark.js`
-  - Run file: `npm run benchmark -- -s "out-test/benchmark/Event.benchmark.js" out-test/benchmark/Event.benchmark.js`
-- Single context/case:
-  - Use `-t` to get the path, then:
-  - `npm run benchmark -- -s "<path>" out-test/benchmark/Event.benchmark.js`
-
-## Benchmark Case Selection
-
-When writing benchmark instructions:
-
-- Use `RuntimeCase` to measure pure runtime in ms.
-- Use `ThroughputRuntimeCase` when measuring throughput in MB/s.
-
-## Notes
-
-- Benchmarks run from built JS in `out-test/benchmark/*.benchmark.js`.
-- Keep `NODE_PATH=./out` (handled by the npm script).

.agents/skills/unit-test/SKILL.md

@@ -1,12 +0,0 @@
----
-name: unit-test
-description: Write and review xterm.js unit tests with project conventions. Use when editing `*.test.ts` files or when asked for test authoring guidelines.
----
-
-# Unit Test Instructions
-
-When writing unit tests, follow these rules:
-
-- When writing unit tests for addons, always create a real xterm.js instance instead of mocking it.
-- Prefer `assert.ok` over `assert.notStrictEqual` when checking something is undefined or not.
-- Avoid comments as most tests should be self-documenting.

.devcontainer/Dockerfile

@@ -0,0 +1,23 @@
+FROM node:14-buster
+
+# Configure apt
+ENV DEBIAN_FRONTEND=noninteractive
+RUN apt-get update \
+    && apt-get -y install --no-install-recommends apt-utils 2>&1
+
+# Verify git and process tools are installed
+RUN apt-get install -y git procps
+
+# Install yarn
+RUN apt-get install -y curl apt-transport-https lsb-release \
+    && curl -sS https://dl.yarnpkg.com/$(lsb_release -is | tr '[:upper:]' '[:lower:]')/pubkey.gpg | apt-key add - 2>/dev/null \
+    && echo "deb https://dl.yarnpkg.com/$(lsb_release -is | tr '[:upper:]' '[:lower:]')/ stable main" | tee /etc/apt/sources.list.d/yarn.list \
+    && apt-get update \
+    && apt-get -y install --no-install-recommends \
+       yarn
+
+# Clean up
+RUN apt-get autoremove -y \
+    && apt-get clean -y \
+    && rm -rf /var/lib/apt/lists/*
+ENV DEBIAN_FRONTEND=dialog

.devcontainer/devcontainer.json

@@ -1,22 +1,10 @@
 {
   "name": "xterm.js",
-  "image": "mcr.microsoft.com/devcontainers/typescript-node:22-bookworm",
-  "features": {
-    "ghcr.io/devcontainers/features/node:1": {
-      "version": 22
-    } // yarn
-  },
-  "forwardPorts": [
-    3000
-  ],
-  "postCreateCommand": "npm install && npm run setup",
-  "customizations": {
-    "vscode": {
-      "extensions": [
-        "dbaeumer.vscode-eslint",
-        "editorconfig.editorconfig",
-        "hbenl.vscode-mocha-test-adapter"
-      ]
-    }
-  }
+  "dockerFile": "Dockerfile",
+  "appPort": 3000,
+  "extensions": [
+    "dbaeumer.vscode-eslint",
+    "editorconfig.editorconfig",
+    "hbenl.vscode-mocha-test-adapter"
+  ]
 }

.editorconfig

@@ -5,6 +5,7 @@ indent_style = space
 indent_size = 2
 insert_final_newline = true
 trim_trailing_whitespace = true
+end_of_line = lf
 
 [*.{j,t}s]
 max_line_length = 100

.eslintrc.json

@@ -0,0 +1,219 @@
+{
+  "env": {
+    "browser": true,
+    "es6": true,
+    "node": true
+  },
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "project": [
+      "demo/tsconfig.json",
+      "src/browser/tsconfig.json",
+      "src/common/tsconfig.json",
+      "src/headless/tsconfig.json",
+      "test/api/tsconfig.json",
+      "test/benchmark/tsconfig.json",
+      "addons/xterm-addon-attach/src/tsconfig.json",
+      "addons/xterm-addon-attach/test/tsconfig.json",
+      "addons/xterm-addon-canvas/src/tsconfig.json",
+      "addons/xterm-addon-fit/src/tsconfig.json",
+      "addons/xterm-addon-fit/test/tsconfig.json",
+      "addons/xterm-addon-ligatures/src/tsconfig.json",
+      "addons/xterm-addon-search/src/tsconfig.json",
+      "addons/xterm-addon-search/test/tsconfig.json",
+      "addons/xterm-addon-serialize/src/tsconfig.json",
+      "addons/xterm-addon-serialize/test/tsconfig.json",
+      "addons/xterm-addon-serialize/benchmark/tsconfig.json",
+      "addons/xterm-addon-unicode11/src/tsconfig.json",
+      "addons/xterm-addon-unicode11/test/tsconfig.json",
+      "addons/xterm-addon-web-links/src/tsconfig.json",
+      "addons/xterm-addon-web-links/test/tsconfig.json",
+      "addons/xterm-addon-webgl/src/tsconfig.json",
+      "addons/xterm-addon-webgl/test/tsconfig.json"
+    ],
+    "sourceType": "module"
+  },
+  "ignorePatterns": [
+    "**/typings/*.d.ts",
+    "**/node_modules",
+    "**/*.js"
+  ],
+  "plugins": [
+    "@typescript-eslint",
+    "jsdoc"
+  ],
+  "rules": {
+    "no-extra-semi": "error",
+    "@typescript-eslint/array-type": [
+      "warn",
+      {
+        "default": "array",
+        "readonly": "generic"
+      }
+    ],
+    "@typescript-eslint/consistent-type-assertions": "warn",
+    "@typescript-eslint/consistent-type-definitions": "warn",
+    "@typescript-eslint/explicit-function-return-type": [
+      "warn",
+      {
+        "allowExpressions": true
+      }
+    ],
+    "@typescript-eslint/explicit-member-accessibility": [
+      "warn",
+      {
+        "accessibility": "explicit",
+        "overrides": {
+          "constructors": "off"
+        }
+      }
+    ],
+    "@typescript-eslint/indent": [
+      "warn",
+      2
+    ],
+    "@typescript-eslint/member-delimiter-style": [
+      "warn",
+      {
+        "multiline": {
+          "delimiter": "semi",
+          "requireLast": true
+        },
+        "singleline": {
+          "delimiter": "comma",
+          "requireLast": false
+        }
+      }
+    ],
+    "@typescript-eslint/naming-convention": [
+      "warn",
+      { "selector": "default", "format": ["camelCase"] },
+      // variableLike
+      { "selector": "variable", "format": ["camelCase", "UPPER_CASE"] },
+      { "selector": "variable", "filter": "^I.+Service$", "format": ["PascalCase"], "prefix": ["I"] },
+      // memberLike
+      { "selector": "memberLike", "modifiers": ["private"], "format": ["camelCase"], "leadingUnderscore": "require" },
+      { "selector": "memberLike", "modifiers": ["protected"], "format": ["camelCase"], "leadingUnderscore": "require" },
+      { "selector": "enumMember", "format": ["UPPER_CASE"] },
+      // memberLike - Allow enum-like objects to use UPPER_CASE
+      { "selector": "property", "modifiers": ["public"], "format": ["camelCase", "UPPER_CASE"] },
+      // restrict on* naming for events only
+      { "selector": "method", "modifiers": ["public"], "format": ["camelCase", "UPPER_CASE"], "custom": {
+        "regex": "^on[A-Z].+",
+        "match": false
+      } },
+      { "selector": "method", "modifiers": ["private"], "format": ["camelCase"], "leadingUnderscore": "require", "custom": {
+        "regex": "^on[A-Z].+",
+        "match": false
+      } },
+      { "selector": "method", "modifiers": ["protected"], "format": ["camelCase"], "leadingUnderscore": "require", "custom": {
+        "regex": "^on[A-Z].+",
+        "match": false
+      } },
+      // typeLike
+      { "selector": "typeLike", "format": ["PascalCase"] },
+      { "selector": "interface", "format": ["PascalCase"], "prefix": ["I"] }
+    ],
+    "@typescript-eslint/prefer-namespace-keyword": "warn",
+    "@typescript-eslint/type-annotation-spacing": "warn",
+    "@typescript-eslint/quotes": [
+      "warn",
+      "single",
+      { "allowTemplateLiterals": true }
+    ],
+    "@typescript-eslint/semi": [
+      "warn",
+      "always"
+    ],
+    "comma-dangle": [
+      "warn",
+      {
+        "objects": "never",
+        "arrays": "never",
+        "functions": "never"
+      }
+    ],
+    "curly": [
+      "warn",
+      "multi-line"
+    ],
+    "eol-last": "warn",
+    "eqeqeq": [
+      "warn",
+      "always"
+    ],
+    "jsdoc/check-alignment": 1,
+    "jsdoc/check-param-names": 1,
+    "jsdoc/no-multi-asterisks": 1,
+    "keyword-spacing": "warn",
+    "new-parens": "warn",
+    "no-duplicate-imports": "warn",
+    "no-else-return": [
+      "warn",
+      {
+        "allowElseIf": false
+      }
+    ],
+    "no-eval": "warn",
+    "no-irregular-whitespace": "warn",
+    "no-restricted-imports": [
+      "warn",
+      {
+        "patterns": [
+          ".*\\/out\\/.*"
+        ]
+      }
+    ],
+    "no-restricted-syntax": [
+      "warn",
+      {
+        "selector": "CallExpression[callee.name='requestAnimationFrame']",
+        "message": "The global requestAnimationFrame() should be avoided, call it on the parent window from ICoreBrowserService."
+      },
+      {
+        "selector": "CallExpression[callee.name='cancelAnimationFrame']",
+        "message": "The global cancelAnimationFrame() should be avoided, call it on the parent window from ICoreBrowserService."
+      },
+      {
+        "selector": "CallExpression > MemberExpression[object.name='window'][property.name='requestAnimationFrame']",
+        "message": "window.requestAnimationFrame() should be avoided, call it on the parent window from ICoreBrowserService."
+      },
+      {
+        "selector": "CallExpression > MemberExpression[object.name='window'][property.name='cancelAnimationFrame']",
+        "message": "window.cancelAnimationFrame() should be avoided, call it on the parent window from ICoreBrowserService."
+      },
+      {
+        "selector": "MemberExpression[object.name='window'][property.name='devicePixelRatio']",
+        "message": "window.devicePixelRatio should be avoided, get it from ICoreBrowserService."
+      }
+    ],
+    "no-trailing-spaces": "warn",
+    "no-unsafe-finally": "warn",
+    "no-var": "warn",
+    "one-var": [
+      "warn",
+      "never"
+    ],
+    "object-curly-spacing": [
+      "warn",
+      "always"
+    ],
+    "prefer-const": "warn",
+    "spaced-comment": [
+      "warn",
+      "always",
+      {
+        "markers": ["/"],
+        "exceptions": ["-"]
+      }
+    ]
+  },
+  "overrides": [
+    {
+      "files": ["**/*.test.ts"],
+      "rules": {
+        "object-curly-spacing": "off"
+      }
+    }
+  ]
+}

.github/ISSUE_TEMPLATE/config.yml

@@ -1,8 +1,5 @@
 blank_issues_enabled: false
 contact_links:
-  - name: FAQ
-    url:  https://github.com/xtermjs/xterm.js/wiki/FAQ
-    about: See our frequently asked questions before filing a bug report
   - name: Support / Q&A
     url:  https://github.com/xtermjs/xterm.js/discussions/categories/q-a
     about: Use GitHub Discussions for community support and general Q&A

.github/workflows/ci.yml

@@ -1,271 +0,0 @@
-name: CI
-
-on:
-  push:
-    branches: [ "master" ]
-  pull_request:
-    branches: [ "master" ]
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-    timeout-minutes: 10
-    steps:
-    - uses: actions/checkout@v3
-    - name: Use Node.js 22.x
-      uses: actions/setup-node@v3
-      with:
-        node-version: 22.x
-        cache: 'npm'
-    - name: Install dependencies
-      run: npm ci
-    - name: Setup and run tsc
-      run: npm run setup
-    - name: Esbuild
-      run: npm run esbuild
-    - name: Zip artifacts
-      run: |
-        zip -r compressed-build \
-          ./lib/* \
-          ./out/* \
-          ./out-*/* \
-          ./addons/addon-attach/lib/* \
-          ./addons/addon-attach/out/* \
-          ./addons/addon-attach/out-*/* \
-          ./addons/addon-clipboard/lib/* \
-          ./addons/addon-clipboard/out/* \
-          ./addons/addon-clipboard/out-*/* \
-          ./addons/addon-fit/lib/* \
-          ./addons/addon-fit/out/* \
-          ./addons/addon-fit/out-*/* \
-          ./addons/addon-image/lib/* \
-          ./addons/addon-image/out/* \
-          ./addons/addon-image/out-*/* \
-          ./addons/addon-ligatures/lib/* \
-          ./addons/addon-ligatures/out/* \
-          ./addons/addon-ligatures/out-*/* \
-          ./addons/addon-progress/lib/* \
-          ./addons/addon-progress/out/* \
-          ./addons/addon-progress/out-*/* \
-          ./addons/addon-search/lib/* \
-          ./addons/addon-search/out/* \
-          ./addons/addon-search/out-*/* \
-          ./addons/addon-serialize/lib/* \
-          ./addons/addon-serialize/out/* \
-          ./addons/addon-serialize/out-*/* \
-          ./addons/addon-unicode11/lib/* \
-          ./addons/addon-unicode11/out/* \
-          ./addons/addon-unicode11/out-*/* \
-          ./addons/addon-unicode-graphemes/lib/* \
-          ./addons/addon-unicode-graphemes/out/* \
-          ./addons/addon-unicode-graphemes/out-*/* \
-          ./addons/addon-web-links/lib/* \
-          ./addons/addon-web-links/out/* \
-          ./addons/addon-web-links/out-*/* \
-          ./addons/addon-web-fonts/lib/* \
-          ./addons/addon-web-fonts/out/* \
-          ./addons/addon-web-fonts/out-*/* \
-          ./addons/addon-webgl/lib/* \
-          ./addons/addon-webgl/out/* \
-          ./addons/addon-webgl/out-*st/*
-    - name: Upload artifacts
-      uses: actions/upload-artifact@v4
-      with:
-        name: build-artifacts
-        path: compressed-build.zip
-        if-no-files-found: error
-
-  lint:
-    runs-on: ubuntu-latest
-    timeout-minutes: 10
-    steps:
-    - uses: actions/checkout@v3
-    - name: Use Node.js 22.x
-      uses: actions/setup-node@v3
-      with:
-        node-version: 22.x
-        cache: 'npm'
-    - name: Install dependencies
-      run: |
-        npm ci
-    - name: Lint code
-      env:
-        NODE_OPTIONS: --max_old_space_size=4096
-      run: npm run lint
-    - name: Lint API
-      run: npm run lint-api
-
-  test-unit-coverage:
-    needs: build
-    runs-on: ubuntu-latest
-    timeout-minutes: 10
-    steps:
-    - uses: actions/checkout@v3
-    - name: Use Node.js 22.x
-      uses: actions/setup-node@v3
-      with:
-        node-version: 22.x
-        cache: 'npm'
-    - name: Install dependencies
-      run: |
-        npm ci
-    - uses: actions/download-artifact@v4
-      with:
-        name: build-artifacts
-    - name: Unzip artifacts
-      shell: bash
-      run: |
-        if [ "$RUNNER_OS" == "Windows" ]; then
-          pwsh -Command "7z x compressed-build.zip -aoa -o${{ github.workspace }}"
-        else
-          unzip -o compressed-build.zip
-        fi
-        ls -R
-    - name: Unit test coverage
-      run: |
-        npm run test-unit-coverage --forbid-only
-        EXIT_CODE=$?
-        ./node_modules/.bin/nyc report --reporter=cobertura
-        exit $EXIT_CODE
-
-  test-unit:
-    timeout-minutes: 20
-    strategy:
-      matrix:
-        node-version: [22]
-        runs-on: [ubuntu, macos, windows]
-    runs-on: ${{ matrix.runs-on }}-latest
-    steps:
-    - uses: actions/checkout@v3
-    - name: Use Node.js ${{ matrix.node-version }}.x
-      uses: actions/setup-node@v3
-      with:
-        node-version: ${{ matrix.node-version }}.x
-        cache: 'npm'
-    - name: Install dependencies
-      run: |
-        npm ci
-    - name: Wait for build job
-      uses: NathanFirmo/wait-for-other-job@v1.1.1
-      with:
-        token: ${{ secrets.GITHUB_TOKEN }}
-        job: build
-    - uses: actions/download-artifact@v4
-      with:
-        name: build-artifacts
-    - name: Unzip artifacts
-      shell: bash
-      run: |
-        if [ "$RUNNER_OS" == "Windows" ]; then
-          pwsh -Command "7z x compressed-build.zip -aoa -o${{ github.workspace }}"
-        else
-          unzip -o compressed-build.zip
-        fi
-        ls -R
-    - name: Unit tests
-      run: npm run test-unit --forbid-only
-
-  test-integration:
-    timeout-minutes: 20
-    strategy:
-      matrix:
-        node-version: [22] # just one as integration tests are about testing in browser
-        runs-on: [ubuntu-22.04] # macos is flaky
-        browser: [chromium, firefox, webkit]
-    runs-on: ${{ matrix.runs-on }}
-    steps:
-    - uses: actions/checkout@v3
-    - name: Use Node.js ${{ matrix.node-version }}.x
-      uses: actions/setup-node@v3
-      with:
-        node-version: ${{ matrix.node-version }}.x
-        cache: 'npm'
-    - name: Install dependencies
-      run: |
-        npm ci
-    - name: Install playwright
-      run: npx playwright install --with-deps ${{ matrix.browser }}
-    - name: Wait for build job
-      uses: NathanFirmo/wait-for-other-job@v1.1.1
-      with:
-        token: ${{ secrets.GITHUB_TOKEN }}
-        job: build
-    - uses: actions/download-artifact@v4
-      with:
-        name: build-artifacts
-    - name: Unzip artifacts
-      shell: bash
-      run: |
-        if [ "$RUNNER_OS" == "Windows" ]; then
-          pwsh -Command "7z x compressed-build.zip -aoa -o${{ github.workspace }}"
-        else
-          unzip -o compressed-build.zip
-        fi
-        ls -R
-    - name: Build demo client
-      run: npm run esbuild-demo-client
-    - name: Build demo server
-      run: npm run esbuild-demo-server
-    - name: Integration tests (core) # Tests use 50% workers to reduce flakiness
-      run: npm run test-integration-${{ matrix.browser }} -- --workers=50% --forbid-only --suite=core
-    - name: Integration tests (addon-attach)
-      run: npm run test-integration-${{ matrix.browser }} -- --workers=50% --forbid-only --suite=addon-attach
-    - name: Integration tests (addon-clipboard)
-      run: npm run test-integration-${{ matrix.browser }} -- --workers=50% --forbid-only --suite=addon-clipboard
-    - name: Integration tests (addon-fit)
-      run: npm run test-integration-${{ matrix.browser }} -- --workers=50% --forbid-only --suite=addon-fit
-    - name: Integration tests (addon-image)
-      run: npm run test-integration-${{ matrix.browser }} -- --workers=50% --forbid-only --suite=addon-image
-    - name: Integration tests (addon-progress)
-      run: npm run test-integration-${{ matrix.browser }} -- --workers=50% --forbid-only --suite=addon-progress
-    - name: Integration tests (addon-search)
-      run: npm run test-integration-${{ matrix.browser }} -- --workers=50% --forbid-only --suite=addon-search
-    - name: Integration tests (addon-serialize)
-      run: npm run test-integration-${{ matrix.browser }} -- --workers=50% --forbid-only --suite=addon-serialize
-    - name: Integration tests (addon-unicode-graphemes)
-      run: npm run test-integration-${{ matrix.browser }} -- --workers=50% --forbid-only --suite=addon-unicode-graphemes
-    - name: Integration tests (addon-unicode11)
-      run: npm run test-integration-${{ matrix.browser }} -- --workers=50% --forbid-only --suite=addon-unicode11
-    - name: Integration tests (addon-web-fonts)
-      run: npm run test-integration-${{ matrix.browser }} -- --workers=50% --forbid-only --suite=addon-web-fonts
-    - name: Integration tests (addon-web-links)
-      run: npm run test-integration-${{ matrix.browser }} -- --workers=50% --forbid-only --suite=addon-web-links
-    - name: Integration tests (addon-webgl)
-      run: npm run test-integration-${{ matrix.browser }} -- --workers=50% --forbid-only --suite=addon-webgl
-
-  release-dry-run:
-    needs: build
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        node-version: [22]
-    steps:
-    - uses: actions/checkout@v3
-    - name: Use Node.js ${{ matrix.node-version }}.x
-      uses: actions/setup-node@v3
-      with:
-        node-version: ${{ matrix.node-version }}.x
-        cache: 'npm'
-    - name: Install dependencies
-      run: |
-        npm ci
-    - name: Install playwright
-      run: npx playwright install
-    - uses: actions/download-artifact@v4
-      with:
-        name: build-artifacts
-    - name: Unzip artifacts
-      shell: bash
-      run: |
-        if [ "$RUNNER_OS" == "Windows" ]; then
-          pwsh -Command "7z x compressed-build.zip -aoa -o${{ github.workspace }}"
-        else
-          unzip -o compressed-build.zip
-        fi
-        ls -R
-    - name: Package headless
-      run: |
-        npm run package-headless
-        node ./bin/package_headless.js
-    - name: Publish to npm (dry run)
-      run: node ./bin/publish.js --dry

.github/workflows/codeql-analysis.yml

@@ -1,9 +1,21 @@
+# For most projects, this workflow file will not need changing; you simply need
+# to commit it to your repository.
+#
+# You may wish to alter this file to override the set of languages analyzed,
+# or to provide custom queries or build logic.
+#
+# ******** NOTE ********
+# We have attempted to detect the languages in your repository. Please check
+# the `language` matrix defined below to confirm you have the correct set of
+# supported CodeQL languages.
+#
 name: "CodeQL"
 
 on:
   push:
     branches: [ "master" ]
   pull_request:
+    # The branches below must be a subset of the branches above
     branches: [ "master" ]
   schedule:
     - cron: '41 17 * * 0'
@@ -21,15 +33,40 @@ jobs:
       fail-fast: false
       matrix:
         language: [ 'javascript' ]
+        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python', 'ruby' ]
+        # Learn more about CodeQL language support at https://aka.ms/codeql-docs/language-support
 
     steps:
     - name: Checkout repository
       uses: actions/checkout@v3
+
+    # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
       uses: github/codeql-action/init@v2
       with:
         languages: ${{ matrix.language }}
+        # If you wish to specify custom queries, you can do so here or in a config file.
+        # By default, queries listed here will override any specified in a config file.
+        # Prefix the list here with "+" to use these queries and those in the config file.
+
+        # Details on CodeQL's query packs refer to : https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-code-scanning#using-queries-in-ql-packs
+        # queries: security-extended,security-and-quality
+
+
+    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+    # If this step fails, then you should remove it and run the build manually (see below)
     - name: Autobuild
       uses: github/codeql-action/autobuild@v2
+
+    # ℹ️ Command-line programs to run using the OS shell.
+    # 📚 See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsrun
+
+    #   If the Autobuild fails above, remove it and uncomment the following three lines.
+    #   modify them (or add more) to build your code if your project, please refer to the EXAMPLE below for guidance.
+
+    # - run: |
+    #   echo "Run, Build Application using script"
+    #   ./location_of_script_within_repo/buildscript.sh
+
     - name: Perform CodeQL Analysis
       uses: github/codeql-action/analyze@v2

.github/workflows/copilot-setup-steps.yml

@@ -1,32 +0,0 @@
-name: "Copilot Setup Steps"
-
-on:
-  workflow_dispatch:
-  push:
-    paths:
-      - .github/workflows/copilot-setup-steps.yml
-  pull_request:
-    paths:
-      - .github/workflows/copilot-setup-steps.yml
-
-jobs:
-  copilot-setup-steps:
-    runs-on: ubuntu-latest
-
-    permissions:
-      contents: read
-
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v4
-      - name: Use Node.js 22.x
-        uses: actions/setup-node@v3
-        with:
-          node-version: 22.x
-          cache: 'npm'
-      - name: Install dependencies
-        run: npm ci
-      - name: Setup and run tsc
-        run: npm run setup
-      - name: Esbuild
-        run: npm run esbuild

.github/workflows/release.yml

@@ -1,30 +0,0 @@
-name: Release
-
-on:
-  push:
-    # If a commit reaches master, assume it has passed CI via PR and publish
-    # without running tests to save time to publish
-    branches: [ "master" ]
-
-jobs:
-  release:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v3
-    - name: Use Node.js 22.x
-      uses: actions/setup-node@v3
-      with:
-        node-version: 22.x
-        cache: 'npm'
-    - name: Install dependencies
-      run: npm ci
-    - name: Build
-      run: npm run setup
-    - name: Package headless
-      run: |
-        npm run package-headless
-        node ./bin/package_headless.js
-    - name: Publish to npm
-      env:
-        NPM_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
-      run: node ./bin/publish.js

.gitignore

@@ -3,10 +3,7 @@ node_modules/
 .lock-wscript
 lib/
 out/
-out-demo/
 out-test/
-out-esbuild/
-out-esbuild-test/
 .nyc_output/
 Makefile.gyp
 *.Makefile
@@ -19,12 +16,7 @@ npm-debug.log
 .env
 build/
 .DS_Store
-yarn.lock
-test-results/
-
-# Tracing/debug files
-.cursor/nal-trace/
-.cursor/*.log
+package-lock.json
 
 # Keep bundled code out of Git
 dist/

.mailmap

@@ -0,0 +1,7 @@
+Antonis Kalipetis <akalipetis@sourcelair.com>
+Antonis Kalipetis <akalipetis@sourcelair.com> <akalipetis@gmail.com>
+Daniel Imms <daimms@microsoft.com> <tyriar@tyriar.com>
+Paris Kasidiaris <paris@sourcelair.com>
+Paris Kasidiaris <pariskasidiaris@gmail.com>
+Thanasis Daglis <thanasis@sourcelair.com>
+Thanasis Daglis <thanasis@sourcelair.com> <ath.daglis@gmail.com>

.mocha.env

@@ -0,0 +1 @@
+NODE_PATH=./out

.mocharc.yml

@@ -0,0 +1,5 @@
+require:
+  - source-map-support/register
+reporter: spec
+color: true
+check-leaks: true

.npmignore

@@ -17,9 +17,6 @@
 !lib/**/*.js
 !lib/**/*.js.map
 
-!lib/**/*.mjs
-!lib/**/*.mjs.map
-
 !lib/**/*.css
 
 # Whitelist - src/

.npmrc

@@ -0,0 +1 @@
+package-lock=false

.nvmrc

@@ -1 +0,0 @@
-22

.vscode/extensions.json

@@ -1,5 +0,0 @@
-{
-    "recommendations": [
-        "dbaeumer.vscode-eslint"
-    ]
-}

.vscode/launch.json

@@ -43,14 +43,7 @@
     {
       "type": "chrome",
       "request": "launch",
-      "name": "Demo Client (Chrome)",
-      "url": "http://127.0.0.1:3000",
-      "webRoot": "${workspaceFolder}/"
-    },
-    {
-      "type": "msedge",
-      "request": "launch",
-      "name": "Demo Client (Edge)",
+      "name": "Demo Client",
       "url": "http://127.0.0.1:3000",
       "webRoot": "${workspaceFolder}/"
     },
@@ -59,9 +52,11 @@
       "request": "launch",
       "name": "Demo Server",
       "runtimeExecutable": "npm",
-      "runtimeArgs": ["start"],
-      "stopOnEntry": true,
-      "runtimeVersion": "22",
+      "runtimeArgs": [
+        "run",
+        "start-debug"
+      ],
+      "port": 9229,
       "serverReadyAction": {
         "action": "openExternally",
         "pattern": "App listening to (http://.*?:[0-9]+)"

.vscode/settings.json

@@ -1,4 +1,13 @@
 {
   "typescript.preferences.importModuleSpecifier": "non-relative",
-  "typescript.preferences.quoteStyle": "single"
+  "typescript.preferences.quoteStyle": "single",
+  "mochaExplorer.envPath": ".mocha.env",
+  "mochaExplorer.files": [
+    "out/**/*.test.js",
+    "addons/**/out/*.test.js"
+  ],
+  "mochaExplorer.watch": [
+    "out/**/*.js",
+    "addons/**/out/*.js"
+  ]
 }

.vscode/tasks.json

@@ -8,87 +8,6 @@
     "showReuseMessage": true
   },
   "tasks": [
-    // Compound tasks
-    {
-      "label": "dev",
-      "detail": "Runs all tasks required to run the demo in a single terminal using concurrently. This does not support problem matching.",
-      "type": "npm",
-      "script": "dev",
-      "isBackground": true,
-      "group": {
-        "kind": "build",
-        "isDefault": true
-      }
-    },
-    {
-      "label": "dev (separate terminals)",
-      "detail": "Runs all tasks required to run the demo in separate terminals. This does support problem matching.",
-      "dependsOn": ["demo-server", "tsc", "esbuild", "esbuild-demo-client", "esbuild-demo-server"],
-      "group": "build"
-    },
-
-    // Demo
-    {
-      "label": "demo-server",
-      "type": "npm",
-      "script": "start",
-      "group": "build",
-      "isBackground": true,
-      "problemMatcher": [],
-      "presentation": {
-        "group": "xterm-demo"
-      }
-    },
-
-    // Build
-    {
-      "label": "tsc",
-      "type": "npm",
-      "script": "tsc-watch",
-      "group": "build",
-      "isBackground": true,
-      "problemMatcher": "$tsc-watch",
-      "presentation": {
-        "group": "xterm-build"
-      }
-    },
-    {
-      "label": "esbuild",
-      "type": "npm",
-      "script": "esbuild-watch",
-      "group": "build",
-      "isBackground": true,
-      "problemMatcher": "$esbuild-watch",
-      "presentation": {
-        "group": "xterm-build"
-      }
-    },
-    {
-      "label": "esbuild-demo-client",
-      "type": "npm",
-      "script": "esbuild-demo-client-watch",
-      "dependsOn": ["esbuild", "tsc"],
-      "group": "build",
-      "isBackground": true,
-      "problemMatcher": "$esbuild-watch",
-      "presentation": {
-        "group": "xterm-demo"
-      }
-    },
-    {
-      "label": "esbuild-demo-server",
-      "type": "npm",
-      "script": "esbuild-demo-server-watch",
-      "dependsOn": ["esbuild", "tsc"],
-      "group": "build",
-      "isBackground": true,
-      "problemMatcher": "$esbuild-watch",
-      "presentation": {
-        "group": "xterm-demo"
-      }
-    },
-
-    // Test
     {
       "type": "npm",
       "script": "test",
@@ -97,6 +16,59 @@
         "isDefault": true
       },
       "problemMatcher": []
+    },
+    {
+      "label": "watch",
+      "type": "npm",
+      "script": "watch",
+      "group": "build",
+      "isBackground": true,
+      "problemMatcher": "$tsc-watch",
+      "presentation": {
+        "group": "vscode"
+      }
+    },
+    {
+      "label": "start",
+      "type": "npm",
+      "script": "start",
+      "group": "build",
+      "isBackground": true,
+      "problemMatcher": [],
+      "presentation": {
+        "group": "vscode"
+      }
+    },
+    {
+      "label": "Start demo",
+      "dependsOn": ["start", "watch"],
+      "group": {
+        "kind": "build",
+        "isDefault": true
+      },
+      "isBackground": true,
+      "problemMatcher": {
+        "owner": "typescript",
+        "fileLocation": [
+          "relative",
+          "${workspaceFolder}"
+        ],
+        "pattern": [
+          {
+            "regexp": "^([^\\\\s].*)\\\\((\\\\d+,\\\\d+)\\\\):\\\\s*(.*)$",
+            "file": 1,
+            "location": 2,
+            "message": 3
+          }
+        ],
+        "background": {
+          "beginsPattern": "assets by",
+          "endsPattern": "webpack \\d+\\.\\d+\\.\\d+ compiled successfully"
+        }
+      },
+      "presentation": {
+        "group": "vscode"
+      }
     }
   ]
 }

AGENTS.md

@@ -1,100 +0,0 @@
-# xterm.js Copilot Instructions
-
-## Architecture Overview
-
-**Core Structure**: xterm.js is a multi-target terminal emulator with three main distributions:
-- `src/browser/`: Full-featured browser terminal with DOM rendering
-- `src/headless/`: Server-side terminal for Node.js (no DOM)
-- `src/common/`: Shared core logic (parsing, buffer management, terminal state)
-
-**Key Classes**:
-- `Terminal` (browser/headless): Public API wrapper
-- `CoreTerminal` (common): Core terminal logic and state
-- `CoreBrowserTerminal` (browser): Browser-specific terminal implementation
-
-## Development Workflow
-
-**Build System**:
-```bash
-npm run build && npm run esbuild # Build all TypeScript and bundle
-```
-
-**Testing**:
-- Unit tests: `npm run test-unit` (Mocha)
-- Unit tests filtering to file: `npm run test-unit -- **/fileName.ts
-- Per-addon unit tests: `npm run test-unit -- addons/addon-image/out-esbuild/*.test.js`
-- Integration tests: `npm run test-integration` (Playwright across Chrome/Firefox/WebKit)
-- Integration tests by file: `npm run test-integration -- test/playwright/InputHandler.test.ts`. Never use grep to filter tests, it doesn't work
-- Integration tests by addon: `npm run test-integration -- --suite=addon-search`. Suites always follow the format `addon-<something>`
-- Lint changes: `npm run lint-changes` to lint only changed files, `npm run lint-changes-fix` to fix them
-
-## Addon Development Pattern
-
-All addons follow this structure:
-```typescript
-export class MyAddon implements ITerminalAddon {
-  activate(terminal: Terminal): void {
-    // Called when loaded via terminal.loadAddon()
-    // Register handlers, access terminal APIs
-  }
-  dispose(): void {
-    // Cleanup when addon is disposed
-  }
-}
-```
-
-**Key Examples**:
-- `addons/addon-fit/`: Terminal sizing
-- `addons/addon-webgl/`: GPU-accelerated rendering
-- `addons/addon-search/`: Text search functionality
-
-## Project-Specific Conventions
-
-**TypeScript Project Structure**: Uses TypeScript project references (`tsconfig.all.json`) for incremental builds across browser/headless/addons.
-
-**API Design**: 
-- Browser and headless terminals share the same public API
-- Proposed APIs require `allowProposedApi: true` option
-- Constructor-only options (cols, rows) cannot be changed after instantiation
-
-**Disposable Management**:
-- When a disposable object can be replaced over time, prefer a registered `MutableDisposable` over manual dispose/reassign logic.
-- Register it on the owning class (for example, `this._register(new MutableDisposable())`) and assign through `.value`; this automatically disposes the previous value and avoids accidentally leaking resources.
-
-**TypeScript Constants**:
-- Prefer `const enum` over top-level `const` declarations for primitive constants when appropriate, since values are inlined and avoid runtime property lookups.
-
-**Testing Utilities**: Use `TestUtils.ts` helpers:
-- `openTerminal(ctx, options)` for setup
-- `pollFor(page, fn, expectedValue)` for async assertions
-- `writeSync(page, data)` for terminal input
-
-## Common Patterns
-
-**Parser Integration**: Register custom escape sequence handlers:
-```typescript
-terminal.parser.registerCsiHandler('m', params => {
-  // Handle SGR sequences
-  return true; // Handled
-});
-```
-
-**Buffer Access**: Read terminal content via buffer API:
-```typescript
-const line = terminal.buffer.active.getLine(0);
-const cell = line?.getCell(0);
-```
-
-**Events**: All terminals emit standard events (onData, onResize, onRender) plus platform-specific ones.
-
-## Critical Implementation Details
-
-- Terminal rendering uses either DOM or WebGL renderers
-- Buffer lines are immutable; create new instances for modifications
-- Character width handling supports Unicode 11+ and grapheme clustering
-- Mouse events translate web events to terminal protocols (X10, VT200, etc.)
-- Color theming supports both palette and true color modes
-
-## Writing unit tests
-
-- Unit tests live alongside the source code file of the thing it's testing with a .test.ts suffix.

CONTRIBUTING.md

@@ -1,50 +1,58 @@
 # How to contribute to xterm.js
 
+- [Opening issues for bug reports or feature requests](#opening-issues)
 - [Contributing code](#contributing-code)
-- [Opening issues](#opening-issues)
-- [Answering discussion questions](#answering-discussion-questions)
-
-## Contributing code
-
-You can find issues to work on by looking at issues labeled with [help wanted](https://github.com/xtermjs/xterm.js/issues?q=is%3Aissue+is%3Aopen+label%3A%22help+wanted%22) or [good first issue](https://github.com/xtermjs/xterm.js/issues?q=is%3Aissue+is%3Aopen+label%3A%22good+first+issue%22). It's a good idea to comment on the issue saying that you're looking into it, just in case someone else comes along and you duplicate work. Once you have your issue, here are the steps to contribute:
-
-- Fork [xterm.js](https://github.com/xtermjs/xterm.js/) ([how to fork a repo](https://help.github.com/articles/fork-a-repo)).
-- Get the [xterm.js demo](https://github.com/xtermjs/xterm.js/wiki/Contributing#running-the-demo) running.
-- Make the fix and verify it works in the demo. Be sure to follow thew general code style of the rest of the project.
-- If your changes are easy to test or likely to regress in the future, add tests. These could be unit or integration (playwright) tests.
-- Submit a pull request ([how to create a pull request](https://help.github.com/articles/fork-a-repo)).
-
-> ![TIP]
-> Don't put more than one feature or fix in a single pull request. The smaller pull requests are the easier they are to review and merge.
-
-By contributing code to xterm.js you:
-
- - Agree to license the contributed code under xterm.js' [MIT license](LICENSE).
- - Confirm that you have the right to contribute and license the code in question. This means that either you hold all rights on the code, or the rights holder has explicitly granted the right to use it like this, through a compatible open source license or through a direct agreement with you.
 
 ## Opening issues
 
 The preferred way to report bugs or request features is to use
-[GitHub issues](http://github.com/xtermjs/xterm.js/issues).
+[GitHub issues](http://github.com/sourcelair/xterm.js/issues). Before
+opening an issue, read these pointers.
 
-### Creating great issues
+### Opening issues effectively
 
-- Include information about **the browser in which the problem occurred** or the terminal being used. If you tested several browsers and the problem occurred in all of them, mention this fact in the bug report. Also include browser version numbers and the operating system that you're on.
-- Include the version of xterm.js being used, preferably either with the latest `beta` tagged release on npm or reproducing in the demo on the `master` branch.
-- Mention precisely what went wrong. What did you expect to happen? What happened instead? Describe the exact steps a maintainer has to take to make the problem occur.
-- If the problem can not be reproduced in the [demo of xterm.js](https://github.com/xtermjs/xterm.js/wiki/Contributing#running-the-demo), provide an HTML document that demonstrates the problem.
-- Be polite and follow [the code of conduct](https://github.com/xtermjs/xterm.js?tab=coc-ov-file#readme).
+- Include information about **the browser in which the problem occurred**. Even
+  if you tested several browsers, and the problem occurred in all of them,
+  mention this fact in the bug report. Also include browser version numbers and
+  the operating system that you're on.
 
-### Issue triaging philosophy
+- Mention which release of xterm.js you're using. Preferably, try also with
+  the current HEAD of the master branch, to ensure the problem has not already been
+  fixed.
 
-It's pretty common for maintainers of large open source projects to suffer from burnout, especially when needing to triage a large number of incoming issues instead of actually building things. Here are some of the steps we take to try mitigate this:
+- Mention precisely what went wrong. What did you expect to happen? What happened instead? Describe the
+  exact steps a maintainer has to take to make the problem occur.
 
-- Support questions live in [GH discussions](https://github.com/xtermjs/xterm.js/discussions), issues may be transfered there without further comment and core maintainers may or may not participate in discussions.
-- Issues are strictly for well defined features or bugs that are _actionable_.
-- Sometimes features are out of scope. A common example of this is a niche feature that the pricipal implementation ([VS Code](https://code.visualstudio.com/)) won't leverage and therefore would be difficult to maintain and likely suffer from bitrot. The reporter may not agree with this, but you could always create an addon if that works or maintain your own fork if it comes to that.
-- If a feature does not have a clear way forward or needs more discussion it may be closed ro moved to a discussion.
-- If a bug is not easily reproducible it may be closed or moved to a discussion. Generally issues that are labeled are something we want to do or has actionable steps to look into further.
+- If the problem can not be reproduced in the [demo of xterm.js](https://github.com/xtermjs/xterm.js/wiki/Contributing#running-the-demo), please provide an HTML document that demonstrates the problem.
 
-## Answering discussion questions
+- Be polite. Issues with an indignant or belligerent tone tend to be moved to the
+  bottom of the pile.
 
-Issues are only meant to track (likely) feature requests and bugs. We use [GitHub Discussions](https://github.com/xtermjs/xterm.js/discussions) for general Q&A as well as discussing possible features. If you want to help out, many questions get asked over at the [discussions page](https://github.com/xtermjs/xterm.js/discussions) which could use an expert as the core team is often stretched thin.
+## Contributing code
+
+You can find issues to work on by looking at the [help wanted](https://github.com/xtermjs/xterm.js/issues?q=is%3Aissue+is%3Aopen+label%3A%22help+wanted%22) or [good first issue](https://github.com/xtermjs/xterm.js/issues?q=is%3Aissue+is%3Aopen+label%3A%22good+first+issue%22) issues. It's a good idea to comment on the issue saying that you're taking it, just in case someone else comes along and you duplicate work. Once you have your issue, here are the steps to contribute:
+
+- Fork [xterm.js](https://github.com/sourcelair/xterm.js/)
+  ([how to fork a repo](https://help.github.com/articles/fork-a-repo)).
+- Get the [xterm.js demo](https://github.com/xtermjs/xterm.js/wiki/Contributing#running-the-demo) running.
+- Make your changes.
+- If your changes are easy to test or likely to regress, add tests. Tests go into `test`, directory.
+- Follow the general code style of the rest of the project (see below).
+- Submit a pull request
+([how to create a pull request](https://help.github.com/articles/fork-a-repo)).
+  Don't put more than one feature/fix in a single pull request.
+
+By contributing code to xterm.js you:
+
+ - Agree to license the contributed code under xterm.js' [MIT
+   license](LICENSE).
+
+ - Confirm that you have the right to contribute and license the code
+   in question. (Either you hold all rights on the code, or the rights
+   holder has explicitly granted the right to use it like this,
+   through a compatible open source license or through a direct
+   agreement with you.)
+
+### Test coverage
+
+One area that always needs attention is improving out unit test coverage, you can view the code coverage report on [Azure Pipelines](https://dev.azure.com/xtermjs/xterm.js/_build/latest?definitionId=3) by clicking the Code Coverage tab.

Procfile

@@ -0,0 +1,2 @@
+web: npm start
+webpack: npm run watch

README.md

@@ -1,71 +1,44 @@
-# [![xterm.js](images/logo-full.png)](https://xtermjs.org)
+# [![xterm.js logo](logo-full.png)](https://xtermjs.org)
 
-Xterm.js is a frontend component that enables applications to bring fully-featured terminals to their users in the browser. It's used by popular projects such as [VS Code](https://code.visualstudio.com/) (and its forks), [Tabby](https://tabby.sh/) and [Hyper](https://hyper.is/).
+[![Build Status](https://dev.azure.com/xtermjs/xterm.js/_apis/build/status/xtermjs.xterm.js)](https://dev.azure.com/xtermjs/xterm.js/_build/latest?definitionId=3)
+
+Xterm.js is a front-end component written in TypeScript that lets applications bring fully-featured terminals to their users in the browser. It's used by popular projects such as VS Code, Hyper and Theia.
 
 ## Features
 
 - **Terminal apps just work**: Xterm.js works with most terminal apps such as `bash`, `vim`, and `tmux`, including support for curses-based apps and mouse events.
-- **Performant**: Xterm.js is *really* fast and includes an optional GPU-accelerated renderer.
+- **Performant**: Xterm.js is *really* fast, it even includes a GPU-accelerated renderer.
 - **Rich Unicode support**: Supports CJK, emojis, and IMEs.
-- **Self-contained**: The core library has zero dependencies.
-- **Accessible**: Screen reader mode and minimum contrast ratio support can be turned on.
-- **And much more**: Links, theming, custom glyphs, addons, well documented API, etc.
+- **Self-contained**: Requires zero dependencies to work.
+- **Accessible**: Screen reader and minimum contrast ratio support can be turned on.
+- **And much more**: Links, theming, addons, well documented API, etc.
 
 ## What xterm.js is not
 
 - Xterm.js is not a terminal application that you can download and use on your computer.
-- Xterm.js is not `bash`. Xterm.js can be connected to processes like `bash` and let you interact with them (provide input, receive output) through a library like [node-pty](https://github.com/microsoft/node-pty).
+- Xterm.js is not `bash`. Xterm.js can be connected to processes like `bash` and let you interact with them (provide input, receive output).
 
 ## Getting Started
 
-First, you need to install the module. We ship exclusively through [npm](https://www.npmjs.com), so you need that installed and then add [@xterm/xterm](https://www.npmjs.com/package/@xterm/xterm) as a dependency by running:
+First, you need to install the module, we ship exclusively through [npm](https://www.npmjs.com/), so you need that installed and then add xterm.js as a dependency by running:
 
 ```bash
-npm install --save @xterm/xterm
+npm install xterm
 ```
 
-The recommended way to load xterm.js with the ES module syntax, either using TypeScript or a modern JS tooling. Note that both CommonJS and ES module files are shipped with the npm package.
-
-```javascript
-import { Terminal } from '@xterm/xterm';
-```
-
-Then instantiate a `Terminal` object, open it on an element and write to it:
-
-```javascript
-const term = new Terminal();
-term.open(document.getElementById('terminal'));
-term.write('Hello from \x1B[1;3;31mxterm.js\x1B[0m $ ')
-```
-
-Most use cases will hook up input and output to a pseudoterminal API such as [node-pty](https://www.npmjs.com/package/node-pty) which will drive the terminal.
-
-```javascript
-pty.onData(data => term.write(data));
-term.onData(data => pty.write(data));
-```
-
-Then make sure to also include the `css/xterm.css` file, for example in HTML:
-
-```html
-<link rel="stylesheet" href="node_modules/@xterm/xterm/css/xterm.css" />
-```
-
-### Standalone example
-
-Here is a complete standalone example in a HTML file:
+To start using xterm.js on your browser, add the `xterm.js` and `xterm.css` to the head of your HTML page. Then create a `<div id="terminal"></div>` onto which xterm can attach itself. Finally, instantiate the `Terminal` object and then call the `open` function with the DOM object of the `div`.
 
 ```html
 <!doctype html>
   <html>
     <head>
-      <link rel="stylesheet" href="node_modules/@xterm/xterm/css/xterm.css" />
-      <script src="node_modules/@xterm/xterm/lib/xterm.js"></script>
+      <link rel="stylesheet" href="node_modules/xterm/css/xterm.css" />
+      <script src="node_modules/xterm/lib/xterm.js"></script>
     </head>
     <body>
       <div id="terminal"></div>
       <script>
-        const term = new Terminal();
+        var term = new Terminal();
         term.open(document.getElementById('terminal'));
         term.write('Hello from \x1B[1;3;31mxterm.js\x1B[0m $ ')
       </script>
@@ -73,19 +46,29 @@ Here is a complete standalone example in a HTML file:
   </html>
 ```
 
+### Importing
+
+The recommended way to load xterm.js is via the ES6 module syntax:
+
+```javascript
+import { Terminal } from 'xterm';
+```
+
 ### Addons
 
+⚠️ *This section describes the new addon format introduced in v3.14.0, see [here](https://github.com/xtermjs/xterm.js/blob/3.14.2/README.md#addons) for the instructions on the old format*
+
 Addons are separate modules that extend the `Terminal` by building on the [xterm.js API](https://github.com/xtermjs/xterm.js/blob/master/typings/xterm.d.ts). To use an addon, you first need to install it in your project:
 
 ```bash
-npm install --save @xterm/addon-web-links
+npm i -S xterm-addon-web-links
 ```
 
 Then import the addon, instantiate it and call `Terminal.loadAddon`:
 
 ```ts
-import { Terminal } from '@xterm/xterm';
-import { WebLinksAddon } from '@xterm/addon-web-links';
+import { Terminal } from 'xterm';
+import { WebLinksAddon } from 'xterm-addon-web-links';
 
 const terminal = new Terminal();
 // Load WebLinksAddon on terminal, this is all that's needed to get web links
@@ -95,59 +78,54 @@ terminal.loadAddon(new WebLinksAddon());
 
 The xterm.js team maintains the following addons, but anyone can build them:
 
-- [`@xterm/addon-attach`](https://github.com/xtermjs/xterm.js/tree/master/addons/addon-attach): Attaches to a server running a process via a websocket
-- [`@xterm/addon-clipboard`](https://github.com/xtermjs/xterm.js/tree/master/addons/addon-clipboard): Access the browser's clipboard
-- [`@xterm/addon-fit`](https://github.com/xtermjs/xterm.js/tree/master/addons/addon-fit): Fits the terminal to the containing element
-- [`@xterm/addon-image`](https://github.com/xtermjs/xterm.js/tree/master/addons/addon-image): Adds image support
-- [`@xterm/addon-ligatures`](https://github.com/xtermjs/xterm.js/tree/master/addons/addon-ligatures): Enables rendering of ligatures
-- [`@xterm/addon-progress`](https://github.com/xtermjs/xterm.js/tree/master/addons/addon-progress): Adds support for the progress API (`OSC 9;4`)
-- [`@xterm/addon-search`](https://github.com/xtermjs/xterm.js/tree/master/addons/addon-search): Adds search functionality
-- [`@xterm/addon-serialize`](https://github.com/xtermjs/xterm.js/tree/master/addons/addon-serialize): Serializes the terminal's buffer to VT sequences or HTML
-- [`@xterm/addon-unicode-graphemes`](https://github.com/xtermjs/xterm.js/tree/master/addons/addon-unicode-graphemes): Enhanced unicode support including grapheme clustering (experimental)
-- [`@xterm/addon-unicode11`](https://github.com/xtermjs/xterm.js/tree/master/addons/addon-unicode11): Updates character widths to their unicode11 values
-- [`@xterm/addon-web-fonts`](https://github.com/xtermjs/xterm.js/tree/master/addons/addon-web-fonts): Easily integrate web fonts
-- [`@xterm/addon-web-links`](https://github.com/xtermjs/xterm.js/tree/master/addons/addon-web-links): Adds web link detection and interaction
-- [`@xterm/addon-webgl`](https://github.com/xtermjs/xterm.js/tree/master/addons/addon-webgl): Renders xterm.js using a `canvas` element's webgl2 context
+- [`xterm-addon-attach`](https://github.com/xtermjs/xterm.js/tree/master/addons/xterm-addon-attach): Attaches to a server running a process via a websocket
+- [`xterm-addon-fit`](https://github.com/xtermjs/xterm.js/tree/master/addons/xterm-addon-fit): Fits the terminal to the containing element
+- [`xterm-addon-search`](https://github.com/xtermjs/xterm.js/tree/master/addons/xterm-addon-search): Adds search functionality
+- [`xterm-addon-web-links`](https://github.com/xtermjs/xterm.js/tree/master/addons/xterm-addon-web-links): Adds web link detection and interaction
 
 ## Browser Support
 
-Since xterm.js is typically implemented as a developer tool, generally only modern evergreen browsers are supported officially. Specifically the latest versions of *Chrome*, *Edge*, *Firefox*, and *Safari*. Xterm.js also works seamlessly in [Electron](https://electronjs.org/) apps and may even work on earlier versions of the browsers. These are the versions we strive to keep working.
+Since xterm.js is typically implemented as a developer tool, only modern browsers are supported officially. Specifically the latest versions of *Chrome*, *Edge*, *Firefox*, and *Safari*.
+
+Xterm.js works seamlessly in [Electron](https://electronjs.org/) apps and may even work on earlier versions of the browsers. These are the versions we strive to keep working.
 
 ### Node.js Support
 
-We also publish [`@xterm/headless`](https://www.npmjs.com/package/@xterm/headless) which is a stripped down version of xterm.js that runs headless in Node.js. An example use case for this is to keep track of a terminal's state where the process is running and using the [serialize addon](https://www.npmjs.com/package/@xterm/addon-serialize) so it can get all state restored upon reconnection.
+We also publish [`xterm-headless`](https://www.npmjs.com/package/xterm-headless) which is a stripped down version of xterm.js that runs in Node.js. An example use case for this is to keep track of a terminal's state where the process is running and using the serialize addon so it can get all state restored upon reconnection.
 
 ## API
 
 The full API for xterm.js is contained within the [TypeScript declaration file](https://github.com/xtermjs/xterm.js/blob/master/typings/xterm.d.ts), use the branch/tag picker in GitHub (`w`) to navigate to the correct version of the API.
 
-Some APIs may be marked with *experimental*, these are added to enable experimentation with new ideas without committing to support it like a normal [semver](https://semver.org/) API. Note that these APIs can change radically between versions, so be sure to read release notes if you plan on using experimental APIs.
+Note that some APIs are marked *experimental*, these are added to enable experimentation with new ideas without committing to support it like a normal [semver](https://semver.org/) API. Note that these APIs can change radically between versions, so be sure to read release notes if you plan on using experimental APIs.
 
 ## Releases
 
-Stable releases are done on an as needed basis. All current and past releases are available on this repo's [releases page](https://github.com/sourcelair/xterm.js/releases), you can see what's planned for upcoming releases looking through the repository [milestones](https://github.com/sourcelair/xterm.js/milestones).
+Xterm.js follows a monthly release cycle roughly.
+
+All current and past releases are available on this repo's [Releases page](https://github.com/sourcelair/xterm.js/releases), you can view the [high-level roadmap on the wiki](https://github.com/xtermjs/xterm.js/wiki/Roadmap) and see what we're working on now by looking through [Milestones](https://github.com/sourcelair/xterm.js/milestones).
 
 ### Beta builds
 
-Beta releases are continuously published off the `master` branch. Install the latest beta build with:
+Our CI releases beta builds to npm for every change that goes into master. Install the latest beta build with:
 
 ```bash
-npm install --save @xterm/xterm@beta
+npm install -S xterm@beta
 ```
 
-The principal implementation (VS Code) typically uses the latest or near the latest beta build. Generally they are quite stable but can potentially contain bugs or breaking changes. If stability is very important we recommend using the beta build primarily to test out new features and to verify bug fixes, unless you're tracking what's landing and are comfortable taking that risk.
+These should generally be stable, but some bugs may slip in. We recommend using the beta build primarily to test out new features and to verify bug fixes.
 
 ## Contributing
 
-Read [CONTRIBUTING.md](https://github.com/xtermjs/xterm.js/blob/master/CONTRIBUTING.md) to learn how to contribute to the project.
+You can read the [guide on the wiki](https://github.com/xtermjs/xterm.js/wiki/Contributing) to learn how to contribute and set up xterm.js for development.
 
 ## Real-world uses
-
-Xterm.js is used in many world-class applications to provide great terminal experiences.
+Xterm.js is used in several world-class applications to provide great terminal experiences.
 
 - [**SourceLair**](https://www.sourcelair.com/): In-browser IDE that provides its users with fully-featured Linux terminals based on xterm.js.
 - [**Microsoft Visual Studio Code**](http://code.visualstudio.com/): Modern, versatile, and powerful open source code editor that provides an integrated terminal based on xterm.js.
 - [**ttyd**](https://github.com/tsl0922/ttyd): A command-line tool for sharing terminal over the web, with fully-featured terminal emulation based on xterm.js.
+- [**Katacoda**](https://www.katacoda.com/): Katacoda is an Interactive Learning Platform for software developers, covering the latest Cloud Native technologies.
 - [**Eclipse Che**](http://www.eclipse.org/che): Developer workspace server, cloud IDE, and Eclipse next-generation IDE.
 - [**Codenvy**](http://www.codenvy.com): Cloud workspaces for development teams.
 - [**CoderPad**](https://coderpad.io): Online interviewing platform for programmers. Run code in many programming languages, with results displayed by xterm.js.
@@ -237,31 +215,14 @@ Xterm.js is used in many world-class applications to provide great terminal expe
 - [**Cratecode**](https://cratecode.com): Learn to program for free through interactive online lessons. Cratecode uses xterm.js to give users access to their own Linux environment.
 - [**Super Terminal**](https://github.com/bugwheels94/super-terminal): It is a http based terminal for developers who dont like repetition and save time.
 - [**graSSHopper**](https://grasshopper.coding.kiwi): A simple SSH client with file explorer, history and many more features.
-- [**DomTerm**](https://domterm.org/xtermjs.html): Tiles and tabs. Detachable sessions (like tmux). [Remote connections](https://domterm.org/Remoting-over-ssh.html) using a nice ssh wrapper with predictive echo. Qt, Electron, Tauri/Wry, or desktop browser front-ends. Choose between xterm.js engine (faster) or native DomTerm (more functionality and graphics) - or both.
-- [**Cloudtutor.io**](https://cloudtutor.io): innovative online learning platform that offers users access to an interactive lab.
-- [**Helix Editor Playground**](https://github.com/tomgroenwoldt/helix-editor-playground): Online playground for the terminal based helix editor.
-- [**Coder**](https://github.com/coder/coder): Self-Hosted Remote Development Environments
-- [**Wave Terminal**](https://waveterm.dev): An open-source, ai-native, terminal built for seamless workflows.
-- [**eva**](https://github.com/info24/eva): Eva is a web application for SSH remote login, developed in Go.
-- [**OpenSFTP**](https://opensftp.com): Super beautiful SSH and SFTP integrated workspace client.
-- [**balena**](https://www.balena.io/): Balena is a full-stack solution for developing, deploying, updating, and troubleshooting IoT Edge devices. We use xterm.js to manage & debug devices on [balenaCloud](https://www.balena.io/cloud).
-- [**Filet Cloud**](https://github.com/fuglaro/filet-cloud): The lean and powerful personal cloud ⛅.
-- [**pyTermTk**](https://github.com/ceccopierangiolieugenio/pyTermTk): Python Terminal Toolkit - a Spiced Up Cross Compatible TUI Library 🌶️, use xterm.js for the [HTML5 exporter](https://ceccopierangiolieugenio.github.io/pyTermTk/sandbox/sandbox.html).
-- [**ecmaOS**](https://ecmaos.sh): A kernel and suite of applications tying modern web technologies into a browser-based operating system.
-- [**LabEx**](https://labex.io): Interactive learning platform with hands-on labs and xterm.js-based online terminals, focused on learn-by-doing approach.
-- [**EmuDevz**](https://afska.github.io/emudevz): A free coding game where players learn how to build an emulator from scratch.
-- [**SSH Connection Manager**](https://github.com/Amtrend/ssh-manager): Modern web-based SSH terminal and SFTP manager with AES-256 encryption, PWA support, and session management.
-- [**WooTTY**](https://github.com/icoretech/wootty): Flawless browser terminal for real operators.
-- [**Orca**](https://github.com/stablyai/orca): Agentic development environment for 100x builders.
-- [**4bit**](https://ciembor.github.io/4bit): Terminal Color Scheme Designer.
 - [And much more...](https://github.com/xtermjs/xterm.js/network/dependents?package_id=UGFja2FnZS0xNjYzMjc4OQ%3D%3D)
 
-Do you use xterm.js in your application as well? Please [open a Pull Request](https://github.com/sourcelair/xterm.js/pulls) to include it here. We would love to have it on our list. Please add any new contributions to the end of the list.
+Do you use xterm.js in your application as well? Please [open a Pull Request](https://github.com/sourcelair/xterm.js/pulls) to include it here. We would love to have it on our list. Note: Please add any new contributions to the end of the list only.
 
 ## License Agreement
 
 If you contribute code to this project, you implicitly allow your code to be distributed under the MIT license. You are also implicitly verifying that all code is your original work.
 
-Copyright (c) 2017-2026, [The xterm.js authors](https://github.com/xtermjs/xterm.js/graphs/contributors) (MIT License)<br>
+Copyright (c) 2017-2022, [The xterm.js authors](https://github.com/xtermjs/xterm.js/graphs/contributors) (MIT License)<br>
 Copyright (c) 2014-2017, SourceLair, Private Company ([www.sourcelair.com](https://www.sourcelair.com/home)) (MIT License)<br>
 Copyright (c) 2012-2013, Christopher Jeffrey (MIT License)

addons/addon-attach/package.json

@@ -1,25 +0,0 @@
-{
-  "name": "@xterm/addon-attach",
-  "version": "0.12.0",
-  "author": {
-    "name": "The xterm.js authors",
-    "url": "https://xtermjs.org/"
-  },
-  "main": "lib/addon-attach.js",
-  "module": "lib/addon-attach.mjs",
-  "types": "typings/addon-attach.d.ts",
-  "repository": "https://github.com/xtermjs/xterm.js/tree/master/addons/addon-attach",
-  "license": "MIT",
-  "keywords": [
-    "terminal",
-    "xterm",
-    "xterm.js"
-  ],
-  "scripts": {
-    "build": "../../node_modules/.bin/tsgo -p .",
-    "prepackage": "npm run build",
-    "package": "../../node_modules/.bin/webpack",
-    "prepublishOnly": "npm run package",
-    "start": "node ../../demo/start"
-  }
-}

addons/addon-attach/test/AttachAddon.test.ts

@@ -1,42 +0,0 @@
-/**
- * Copyright (c) 2019 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-import WebSocket = require('ws');
-
-import test from '@playwright/test';
-import { ITestContext, createTestContext, openTerminal, pollFor, timeout } from '../../../test/playwright/TestUtils';
-
-let ctx: ITestContext;
-test.beforeAll(async ({ browser }) => {
-  ctx = await createTestContext(browser);
-  await openTerminal(ctx);
-});
-test.afterAll(async () => await ctx.page.close());
-
-test.describe('Search Tests', () => {
-
-  test.beforeEach(async () => {
-    await ctx.proxy.reset();
-  });
-
-  test('string', async function(): Promise<any> {
-    const port = 8080;
-    const server = new WebSocket.Server({ port });
-    server.on('connection', socket => socket.send('foo'));
-    await ctx.page.evaluate(`window.term.loadAddon(new window.AttachAddon(new WebSocket('ws://localhost:${port}')))`);
-    await pollFor(ctx.page, `window.term.buffer.active.getLine(0).translateToString(true)`, 'foo');
-    server.close();
-  });
-
-  test('utf8', async function(): Promise<any> {
-    const port = 8080;
-    const server = new WebSocket.Server({ port });
-    const data = new Uint8Array([102, 111, 111]);
-    server.on('connection', socket => socket.send(data));
-    await ctx.page.evaluate(`window.term.loadAddon(new window.AttachAddon(new WebSocket('ws://localhost:${port}')))`);
-    await pollFor(ctx.page, `window.term.buffer.active.getLine(0).translateToString(true)`, 'foo');
-    server.close();
-  });
-});

addons/addon-attach/test/playwright.config.ts

@@ -1,34 +0,0 @@
-import { PlaywrightTestConfig } from '@playwright/test';
-
-const config: PlaywrightTestConfig = {
-  testDir: '.',
-  timeout: 10000,
-  projects: [
-    {
-      name: 'Chromium',
-      use: {
-        browserName: 'chromium'
-      }
-    },
-    {
-      name: 'FirefoxStable',
-      use: {
-        browserName: 'firefox'
-      }
-    },
-    {
-      name: 'WebKit',
-      use: {
-        browserName: 'webkit'
-      }
-    }
-  ],
-  reporter: 'list',
-  webServer: {
-    command: 'npm run start',
-    port: 3000,
-    timeout: 120000,
-    reuseExistingServer: !process.env.CI
-  }
-};
-export default config;

addons/addon-attach/tsconfig.json

@@ -1,12 +0,0 @@
-{
-  "files": [],
-  "include": [],
-  "references": [
-    {
-      "path": "./src"
-    },
-    {
-      "path": "./test"
-    }
-  ]
-}

addons/addon-clipboard/README.md

@@ -1,53 +0,0 @@
-## @xterm/addon-clipboard
-
-An addon for [xterm.js](https://github.com/xtermjs/xterm.js) that enables
-accessing the system clipboard. This addon requires xterm.js v4+.
-
-### Install
-
-```bash
-npm install --save @xterm/addon-clipboard
-```
-
-### Usage
-
-```ts
-import { Terminal } from 'xterm';
-import { ClipboardAddon } from '@xterm/addon-clipboard';
-
-const terminal = new Terminal();
-const clipboardAddon = new ClipboardAddon();
-terminal.loadAddon(clipboardAddon);
-```
-
-To use a custom clipboard provider
-
-```ts
-import { Terminal } from '@xterm/xterm';
-import { ClipboardAddon, IClipboardProvider, ClipboardSelectionType } from '@xterm/addon-clipboard';
-
-function b64Encode(data: string): string {
-  // Base64 encode impl
-}
-
-function b64Decode(data: string): string {
-  // Base64 decode impl
-}
-
-class MyCustomClipboardProvider implements IClipboardProvider {
-  private _data: string
-  public readText(selection: ClipboardSelectionType): Promise<string> {
-    return Promise.resolve(b64Encode(this._data));
-  }
-  public writeText(selection: ClipboardSelectionType, data: string): Promise<void> {
-    this._data = b64Decode(data);
-    return Promise.resolve();
-  }
-}
-
-const terminal = new Terminal();
-const clipboardAddon = new ClipboardAddon(new MyCustomClipboardProvider());
-terminal.loadAddon(clipboardAddon);
-```
-
-See the full [API](https://github.com/xtermjs/xterm.js/blob/master/addons/addon-clipboard/typings/addon-clipboard.d.ts) for more advanced usage.

addons/addon-clipboard/package.json

@@ -1,25 +0,0 @@
-{
-  "name": "@xterm/addon-clipboard",
-  "version": "0.2.0",
-  "author": {
-    "name": "The xterm.js authors",
-    "url": "https://xtermjs.org/"
-  },
-  "main": "lib/addon-clipboard.js",
-  "module": "lib/addon-clipboard.mjs",
-  "types": "typings/addon-clipboard.d.ts",
-  "repository": "https://github.com/xtermjs/xterm.js/tree/master/addons/addon-clipboard",
-  "license": "MIT",
-  "keywords": [
-    "terminal",
-    "xterm",
-    "xterm.js"
-  ],
-  "scripts": {
-    "build": "../../node_modules/.bin/tsgo -p .",
-    "prepackage": "npm run build",
-    "package": "../../node_modules/.bin/webpack",
-    "prepublishOnly": "npm run package",
-    "start": "node ../../demo/start"
-  }
-}

addons/addon-clipboard/src/ClipboardAddon.ts

@@ -1,91 +0,0 @@
-/**
- * Copyright (c) 2023 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-import type { IDisposable, ITerminalAddon, Terminal } from '@xterm/xterm';
-import { type IClipboardProvider, type IBase64 } from '@xterm/addon-clipboard';
-
-export class ClipboardAddon implements ITerminalAddon {
-  private _terminal?: Terminal;
-  private _disposable?: IDisposable;
-
-  constructor(
-    private _base64: IBase64 = new Base64(),
-    private _provider: IClipboardProvider = new BrowserClipboardProvider()
-  ) {}
-
-  public activate(terminal: Terminal): void {
-    this._terminal = terminal;
-    this._disposable = terminal.parser.registerOscHandler(52, data => this._setOrReportClipboard(data));
-  }
-
-  public dispose(): void {
-    return this._disposable?.dispose();
-  }
-
-  private _readText(sel: string, data: string): void {
-    const b64 = this._base64.encodeText(data);
-    this._terminal?.input(`\x1b]52;${sel};${b64}\x07`, false);
-  }
-
-  private _setOrReportClipboard(data: string): boolean | Promise<boolean> {
-    const args = data.split(';');
-    if (args.length < 2) {
-      return true;
-    }
-
-    const pc = args[0];
-    const pd = args[1];
-    if (pd === '?') {
-      const text = this._provider.readText(pc);
-
-      // Report clipboard
-      if (text instanceof Promise) {
-        return text.then((data) => {
-          this._readText(pc, data);
-          return true;
-        });
-      }
-
-      this._readText(pc, text);
-      return true;
-    }
-
-    // Clear clipboard if text is not a base64 encoded string.
-    let text = '';
-    try {
-      text = this._base64.decodeText(pd);
-    } catch {}
-
-
-    const result = this._provider.writeText(pc, text);
-    if (result instanceof Promise) {
-      return result.then(() => true);
-    }
-
-    return true;
-  }
-}
-
-export class BrowserClipboardProvider implements IClipboardProvider {
-  public readText(selection: string): Promise<string> {
-    return navigator.clipboard.readText();
-  }
-
-  public writeText(selection: string, text: string): Promise<void> {
-    return navigator.clipboard.writeText(text);
-  }
-}
-
-export class Base64 implements IBase64 {
-  public encodeText(data: string): string {
-    return btoa(data);
-  }
-  public decodeText(data: string): string {
-    try {
-      return atob(data);
-    } catch {}
-    return '';
-  }
-}

addons/addon-clipboard/test/ClipboardAddon.test.ts

@@ -1,95 +0,0 @@
-/**
- * Copyright (c) 2023 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-import test from '@playwright/test';
-import { deepEqual, ok, strictEqual } from 'assert';
-import { ITestContext, createTestContext, launchBrowser, openTerminal, timeout } from '../../../test/playwright/TestUtils';
-
-let ctx: ITestContext;
-test.beforeAll(async ({ browser }, testInfo) => {
-  ctx = await createTestContext(browser);
-  await openTerminal(ctx);
-});
-test.afterAll(async () => {
-  await ctx.page.close();
-});
-
-test.describe('ClipboardAddon', () => {
-
-  test.beforeEach(async ({}, testInfo) => {
-    // DEBT: This test doesn't work since the migration to @playwright/test
-    if (ctx.browser.browserType().name() === 'webkit') {
-      testInfo.skip();
-      return;
-    }
-    if (ctx.browser.browserType().name() === 'chromium') {
-      // Enable clipboard access in chromium without user gesture
-      await ctx.page.context().grantPermissions(['clipboard-read', 'clipboard-write']);
-    }
-    await ctx.page.evaluate(`
-      window.term.reset()
-      window.clipboard?.dispose();
-      window.clipboard = new ClipboardAddon();
-      window.term.loadAddon(window.clipboard);
-    `);
-  });
-
-  test.beforeEach(async () => {
-    await ctx.proxy.reset();
-  });
-
-  const testDataEncoded = 'aGVsbG8gd29ybGQ=';
-  const testDataDecoded = 'hello world';
-
-  test.describe('write data', async function (): Promise<any> {
-    test('simple string', async () => {
-      await ctx.proxy.write(`\x1b]52;c;${testDataEncoded}\x07`);
-      deepEqual(await ctx.page.evaluate(() => window.navigator.clipboard.readText()), testDataDecoded);
-    });
-    test('primary selection', async () => {
-      await ctx.proxy.write(`\x1b]52;p;${testDataEncoded}\x07`);
-      deepEqual(await ctx.page.evaluate(() => window.navigator.clipboard.readText()), testDataDecoded);
-    });
-    test('empty selection (default)', async () => {
-      await ctx.proxy.write(`\x1b]52;;${testDataEncoded}\x07`);
-      deepEqual(await ctx.page.evaluate(() => window.navigator.clipboard.readText()), testDataDecoded);
-    });
-    test('invalid base64 string', async () => {
-      await ctx.proxy.write(`\x1b]52;c;${testDataEncoded}invalid\x07`);
-      deepEqual(await ctx.page.evaluate(() => window.navigator.clipboard.readText()), '');
-    });
-    test('empty string', async () => {
-      await ctx.proxy.write(`\x1b]52;c;${testDataEncoded}\x07`);
-      await ctx.proxy.write(`\x1b]52;c;\x07`);
-      deepEqual(await ctx.page.evaluate(() => window.navigator.clipboard.readText()), '');
-    });
-  });
-
-  test.describe('read data', async function (): Promise<any> {
-    test.beforeAll(async () => {
-      await ctx.page.evaluate(`
-        window.data = [];
-        window.term.onData(e => data.push(e));
-      `);
-    });
-    test('simple string', async () => {
-      await ctx.page.evaluate('window.data.length = 0;');
-      await ctx.page.evaluate(() => window.navigator.clipboard.writeText('hello world'));
-      await ctx.proxy.write(`\x1b]52;c;?\x07`);
-      deepEqual(await ctx.page.evaluate('window.data'), [`\x1b]52;c;${testDataEncoded}\x07`]);
-    });
-    test('primary selection', async () => {
-      await ctx.page.evaluate('window.data.length = 0;');
-      await ctx.page.evaluate(() => window.navigator.clipboard.writeText('hello world'));
-      await ctx.proxy.write(`\x1b]52;p;?\x07`);
-      deepEqual(await ctx.page.evaluate('window.data'), [`\x1b]52;p;${testDataEncoded}\x07`]);
-    });
-    test('clear clipboard', async () => {
-      await ctx.proxy.write(`\x1b]52;c;!\x07`);
-      await ctx.proxy.write(`\x1b]52;c;?\x07`);
-      deepEqual(await ctx.page.evaluate(() => window.navigator.clipboard.readText()), '');
-    });
-  });
-});

addons/addon-clipboard/test/playwright.config.ts

@@ -1,34 +0,0 @@
-import { PlaywrightTestConfig } from '@playwright/test';
-
-const config: PlaywrightTestConfig = {
-  testDir: '.',
-  timeout: 10000,
-  projects: [
-    {
-      name: 'Chromium',
-      use: {
-        browserName: 'chromium'
-      }
-    },
-    {
-      name: 'FirefoxStable',
-      use: {
-        browserName: 'firefox'
-      }
-    },
-    {
-      name: 'WebKit',
-      use: {
-        browserName: 'webkit'
-      }
-    }
-  ],
-  reporter: 'list',
-  webServer: {
-    command: 'npm run start',
-    port: 3000,
-    timeout: 120000,
-    reuseExistingServer: !process.env.CI
-  }
-};
-export default config;

addons/addon-clipboard/tsconfig.json

@@ -1,12 +0,0 @@
-{
-  "files": [],
-  "include": [],
-  "references": [
-    {
-      "path": "./src"
-    },
-    {
-      "path": "./test"
-    }
-  ]
-}

addons/addon-clipboard/typings/addon-clipboard.d.ts

@@ -1,104 +0,0 @@
-/**
- * Copyright (c) 2023 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-import { Terminal, ITerminalAddon } from '@xterm/xterm';
-
-declare module '@xterm/addon-clipboard' {
-  /**
-   * An xterm.js addon that enables accessing the system clipboard from
-   * xterm.js.
-   */
-  export class ClipboardAddon implements ITerminalAddon {
-    /**
-     * Creates a new clipboard addon.
-     * @param base64 An optional base64 encoder/decoder.
-     * @param provider An optional clipboard provider.
-     */
-    constructor(base64?: IBase64, provider?: IClipboardProvider);
-
-    /**
-     * Activates the addon
-     * @param terminal The terminal the addon is being loaded in.
-     */
-    public activate(terminal: Terminal): void;
-
-    /**
-     * Disposes the addon.
-     */
-    public dispose(): void
-  }
-
-  export interface IBase64 {
-    /**
-    * Converts a utf-8 string to a base64 string.
-    * @param data The utf-8 string to convert to base64 string.
-    */
-    encodeText(data: string): string;
-
-    /**
-    * Converts a base64 string to a utf-8 string.
-    * @param data The base64 string to convert to utf-8 string.
-    * @throws An error if the input is not valid base64.
-    */
-    decodeText(data: string): string;
-  }
-
-  /**
-   * A default Base64 encoding and decoding type.
-   **/
-  export class Base64 implements IBase64 {
-    /**
-     * Converts a utf-8 string to a base64 string.
-     * @param data The utf-8 string to convert to base64 string.
-     */
-    public encodeText(data: string): string;
-
-    /**
-     * Converts a base64 string to a utf-8 string.
-     * @param data The base64 string to convert to utf-8 string.
-     * @throws An error if the input is not valid base64.
-     */
-    public decodeText(data: string): string;
-  }
-
-  export interface IClipboardProvider {
-    /**
-     * Gets the clipboard content.
-     * @param selection The clipboard selection to read (see OSC 52 spec of xterm).
-     * @returns A promise that resolves with clipboard selection data.
-     */
-    readText(selection: string): string | Promise<string>;
-
-    /**
-     * Sets the clipboard content.
-     * @param selection The clipboard selection to set (see OSC 52 spec of xterm).
-     * @param data The clipboard text to write.
-     */
-    writeText(selection: string, text: string): void | Promise<void>;
-  }
-
-  /**
-   * The clipboard provider interface that enables xterm.js to access the browser clipboard.
-   *
-   * Note this this clipboard provider does not implement own cut buffers as xterm does,
-   * but redirect the selection parameter always to navigator.clipboard.
-   */
-  export class BrowserClipboardProvider implements IClipboardProvider{
-    /**
-     * Reads text from the clipboard.
-     * @param selection The selection type to read from (always refers to navigator.clipboard).
-     * @returns A promise that resolves with the text from the clipboard.
-     */
-    public readText(selection: string): Promise<string>;
-
-    /**
-     * Writes text to the clipboard.
-     * @param selection The selection type to write to (always refers to navigator.clipboard).
-     * @param data The text to write to the clipboard.
-     * @returns A promise that resolves when the text has been written to the clipboard.
-     */
-    public writeText(selection: string, data: string): Promise<void>;
-  }
-}

addons/addon-fit/package.json

@@ -1,25 +0,0 @@
-{
-  "name": "@xterm/addon-fit",
-  "version": "0.11.0",
-  "author": {
-    "name": "The xterm.js authors",
-    "url": "https://xtermjs.org/"
-  },
-  "main": "lib/addon-fit.js",
-  "module": "lib/addon-fit.mjs",
-  "types": "typings/addon-fit.d.ts",
-  "repository": "https://github.com/xtermjs/xterm.js/tree/master/addons/addon-fit",
-  "license": "MIT",
-  "keywords": [
-    "terminal",
-    "xterm",
-    "xterm.js"
-  ],
-  "scripts": {
-    "build": "../../node_modules/.bin/tsgo -p .",
-    "prepackage": "npm run build",
-    "package": "../../node_modules/.bin/webpack",
-    "prepublishOnly": "npm run package",
-    "start": "node ../../demo/start"
-  }
-}

addons/addon-fit/src/tsconfig.json

@@ -1,28 +0,0 @@
-{
-  "compilerOptions": {
-    "module": "commonjs",
-    "target": "es2021",
-    "lib": [
-      "dom",
-      "es2015"
-    ],
-    "rootDir": ".",
-    "outDir": "../out",
-    "sourceMap": true,
-    "removeComments": true,
-    "strict": true,
-    "types": [
-      "../../../node_modules/@types/mocha"
-    ]
-  },
-  "include": [
-    "./**/*",
-    "../../../typings/xterm.d.ts",
-    "../typings/addon-fit.d.ts"
-  ],
-  "references": [
-    {
-      "path": "../../../src/browser"
-    }
-  ]
-}

addons/addon-fit/test/FitAddon.test.ts

@@ -1,144 +0,0 @@
-/**
- * Copyright (c) 2019 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-import test from '@playwright/test';
-import { deepEqual, ok, strictEqual } from 'assert';
-import { ITestContext, createTestContext, openTerminal, timeout } from '../../../test/playwright/TestUtils';
-
-let ctx: ITestContext;
-test.beforeAll(async ({ browser }) => {
-  ctx = await createTestContext(browser);
-  ctx.page.setViewportSize({ width: 1024, height: 768 });
-  await openTerminal(ctx);
-});
-test.afterAll(async () => await ctx.page.close());
-
-test.describe('FitAddon', () => {
-  test.beforeEach(async function(): Promise<any> {
-    await ctx.page.evaluate(`document.querySelector('#terminal-container').style.display=''`);
-    await ctx.page.evaluate(`
-      window.term.reset()
-      window.fit?.dispose();
-      window.fit = new FitAddon();
-      window.term.loadAddon(window.fit);
-    `);
-  });
-
-  // test.beforeEach(async function(): Promise<any> {
-  //   await ctx.page.evaluate(`document.querySelector('#terminal-container').style.display=''`);
-  //   await openTerminal(page);
-  // });
-
-  // after(async () => {
-  //   await browser.close();
-  // });
-
-  // afterEach(async function(): Promise<any> {
-  //   await ctx.proxy.dispose();
-  // });
-
-  test('no terminal', async function(): Promise<any> {
-    await ctx.page.evaluate(`window.fit2 = new FitAddon();`);
-    strictEqual(await ctx.page.evaluate(`window.fit2.proposeDimensions()`), undefined);
-    await ctx.page.evaluate(`window.fit2.dispose();`);
-  });
-
-  test.describe('proposeDimensions', () => {
-    test('default', async function(): Promise<any> {
-      await setDimensions();
-      const dimensions: {cols: number, rows: number} = await ctx.page.evaluate(`window.fit.proposeDimensions()`);
-      ok(dimensions.cols > 85);
-      ok(dimensions.cols < 88);
-      ok(dimensions.rows > 24);
-      ok(dimensions.rows < 29);
-    });
-
-    test('width', async function(): Promise<any> {
-      await setDimensions(1008);
-      const dimensions: {cols: number, rows: number} = await ctx.page.evaluate(`window.fit.proposeDimensions()`);
-      ok(dimensions.cols > 108);
-      ok(dimensions.cols < 111);
-      ok(dimensions.rows > 24);
-      ok(dimensions.rows < 29);
-    });
-
-    test('small', async function(): Promise<any> {
-      await setDimensions(1, 1);
-      deepEqual(await ctx.page.evaluate(`window.fit.proposeDimensions()`), {
-        cols: 2,
-        rows: 1
-      });
-    });
-
-    test('hidden', async function(): Promise<any> {
-      await ctx.proxy.dispose();
-      await ctx.page.evaluate(`document.querySelector('#terminal-container').style.display='none'`);
-      await ctx.page.evaluate(`window.term = new Terminal()`);
-      await ctx.page.evaluate(`window.term.open(document.querySelector('#terminal-container'))`);
-      await setDimensions();
-      const dimensions: { cols: number, rows: number } | undefined = await ctx.page.evaluate(`window.fit.proposeDimensions()`);
-      // The value of dims will be undefined if the char measure strategy falls back to the DOM
-      // method, so only assert if it's not undefined.
-      if (dimensions) {
-        ok(dimensions.cols > 85);
-        ok(dimensions.cols < 88);
-        ok(dimensions.rows > 24);
-        ok(dimensions.rows < 29);
-      }
-    });
-  });
-
-  test.describe('fit', () => {
-    test('default', async function(): Promise<any> {
-      await setDimensions();
-      await ctx.page.evaluate(`window.fit.fit()`);
-      const cols: number = await ctx.proxy.cols;
-      const rows: number = await ctx.proxy.rows;
-      ok(cols > 85);
-      ok(cols < 88);
-      ok(rows > 24);
-      ok(rows < 29);
-    });
-
-    test('width', async function(): Promise<any> {
-      await setDimensions(1008);
-      await ctx.page.evaluate(`window.fit.fit()`);
-      const cols: number = await ctx.proxy.cols;
-      const rows: number = await ctx.proxy.rows;
-      ok(cols > 108);
-      ok(cols < 111);
-      ok(rows > 24);
-      ok(rows < 29);
-    });
-
-    test('small', async function(): Promise<any> {
-      await setDimensions(1, 1);
-      await ctx.page.evaluate(`window.fit.fit()`);
-      strictEqual(await ctx.proxy.cols, 2);
-      strictEqual(await ctx.proxy.rows, 1);
-    });
-
-    test('same dimensions', async function(): Promise<any> {
-      await setDimensions();
-      await ctx.page.evaluate(`window.fit.fit()`);
-      const cols: number = await ctx.proxy.cols;
-      const rows: number = await ctx.proxy.rows;
-      // Calling fit() again at the same container size should not throw
-      await ctx.page.evaluate(`window.fit.fit()`);
-      strictEqual(await ctx.proxy.cols, cols);
-      strictEqual(await ctx.proxy.rows, rows);
-    });
-  });
-});
-
-async function setDimensions(width: number = 800, height: number = 450): Promise<void> {
-  await ctx.page.evaluate(`
-    document.querySelector('#terminal-container').style.width='${width}px';
-    document.querySelector('#terminal-container').style.height='${height}px';
-    document.querySelector('#terminal-container').style.display='';
-  `);
-  // HACK: Await a short period as hiding #terminal-container can mess with other tests
-  await timeout(500);
-}

addons/addon-fit/test/playwright.config.ts

@@ -1,34 +0,0 @@
-import { PlaywrightTestConfig } from '@playwright/test';
-
-const config: PlaywrightTestConfig = {
-  testDir: '.',
-  timeout: 10000,
-  projects: [
-    {
-      name: 'Chromium',
-      use: {
-        browserName: 'chromium'
-      }
-    },
-    {
-      name: 'FirefoxStable',
-      use: {
-        browserName: 'firefox'
-      }
-    },
-    {
-      name: 'WebKit',
-      use: {
-        browserName: 'webkit'
-      }
-    }
-  ],
-  reporter: 'list',
-  webServer: {
-    command: 'npm run start',
-    port: 3000,
-    timeout: 120000,
-    reuseExistingServer: !process.env.CI
-  }
-};
-export default config;

addons/addon-fit/test/tsconfig.json

@@ -1,32 +0,0 @@
-{
-  "compilerOptions": {
-    "module": "commonjs",
-    "target": "ESNext",
-    "lib": [
-      "es2021"
-    ],
-    "rootDir": ".",
-    "outDir": "../out-test",
-    "sourceMap": true,
-    "removeComments": true,
-    "strict": true,
-    "types": [
-      "../../../node_modules/@types/node"
-    ]
-  },
-  "include": [
-    "./**/*",
-    "../../../typings/xterm.d.ts"
-  ],
-  "references": [
-    {
-      "path": "../../../src/common"
-    },
-    {
-      "path": "../../../src/browser"
-    },
-    {
-      "path": "../../../test/playwright"
-    }
-  ]
-}

addons/addon-fit/tsconfig.json

@@ -1,12 +0,0 @@
-{
-  "files": [],
-  "include": [],
-  "references": [
-    {
-      "path": "./src"
-    },
-    {
-      "path": "./test"
-    }
-  ]
-}

addons/addon-image/.gitignore

@@ -1,33 +0,0 @@
-node_modules/
-*.swp
-.lock-wscript
-lib/
-out/
-out-test/
-out-worker/
-.nyc_output/
-Makefile.gyp
-*.Makefile
-*.target.gyp.mk
-*.node
-example/*.log
-docs/
-npm-debug.log
-/.idea/
-.env
-build/
-.DS_Store
-yarn.lock
-
-# Keep bundled code out of Git
-dist/
-demo/dist/
-
-# skip benchmark & inwasm folders, except builds
-.benchmark/
-timeline/
-inwasm-sdks/
-inwasm-builds/
-!inwasm-builds/**/final.wat
-!inwasm-builds/**/final.wasm
-!inwasm-builds/**/definition.json

addons/addon-image/.npmignore

@@ -1,12 +0,0 @@
-.github
-fixture
-overwrite
-bootstrap.sh
-tsconfig.json
-webpack.config.js
-test
-out-test
-out-esbuild
-out-esbuild-test
-inwasm-sdks
-inwasm-builds

addons/addon-image/LICENSE

@@ -1,19 +0,0 @@
-Copyright (c) 2019, 2020, 2021, 2022, 2023 The xterm.js authors (https://github.com/xtermjs/xterm.js)
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.

addons/addon-image/README.md

@@ -1,233 +0,0 @@
-## @xterm/addon-image
-
-Inline image output in xterm.js. Supports SIXEL and iTerm's inline image protocol (IIP).
-
-
-![](fixture/example.png)
-
-
-### Install from npm
-
-```bash
-npm install --save @xterm/addon-image
-```
-
-
-### Usage
-
-```ts
-import { Terminal } from '@xterm/xterm';
-import { ImageAddon, IImageAddonOptions } from '@xterm/addon-image';
-
-// customize as needed (showing addon defaults)
-const customSettings: IImageAddonOptions = {
-  enableSizeReports: true,    // whether to enable CSI t reports (see below)
-  pixelLimit: 16777216,       // max. pixel size of a single image
-  sixelSupport: true,         // enable sixel support
-  sixelScrolling: true,       // whether to scroll on image output
-  sixelPaletteLimit: 4096,    // initial sixel palette size
-  sixelSizeLimit: 33554432,   // size limit of a single sixel sequence
-  storageLimit: 128,          // FIFO storage limit in MB
-  showPlaceholder: true,      // whether to show a placeholder for evicted images
-  iipSupport: true,           // enable iTerm IIP support
-  iipSizeLimit: 33554432,     // size limit of a single IIP sequence
-  kittySupport: true,         // enable Kitty graphics support
-  kittySizeLimit: 33554432    // size limit of a single Kitty sequence
-}
-
-// initialization
-const terminal = new Terminal();
-const imageAddon = new ImageAddon(customSettings);
-terminal.loadAddon(imageAddon);
-```
-
-### General Notes
-
-- *IMPORTANT:* The worker approach as done in previous releases got removed.
-  The addon contructor no longer expects a worker path as first argument.
-
-- By default the addon will activate these `windowOptions` reports on the terminal:
-  - getWinSizePixels (CSI 14 t)
-  - getCellSizePixels (CSI 16 t)
-  - getWinSizeChars (CSI 18 t)
-  
-  to help applications getting useful terminal metrics for their image preparations. Set `enableSizeReports` in the constructor options to `false`, if you dont want the addon to alter these terminal settings. This is especially useful, if you have very strict security needs not allowing any terminal reports, or deal with `windowOptions` by other means.
-
-
-### Operation Modes
-
-- **SIXEL Support**  
-  Set by default, change it with `{sixelSupport: true}`.
-
-- **Scrolling On | Off**  
-  By default scrolling is on, thus an image will advance the cursor at the bottom if needed.
-  (see cursor positioning).
-
-  If scrolling is off, the image gets painted from the top left of the current viewport
-  and might be truncated if the image exceeds the viewport size.
-  The cursor position does not change.
-
-  You can customize this behavior with the constructor option `{sixelScrolling: false}`
-  or with `DECSET 80` (off, binary: `\x1b [ ? 80 h`) and
-  `DECRST 80` (on, binary: `\x1b [ ? 80 l`) during runtime.
-
-- **Cursor Positioning**  
-  If scrolling is set, the cursor will be placed at the first image column of the last image row (VT340 mode).
-  Other cursor positioning modes as used by xterm or mintty are not supported.
-
-- **SIXEL Palette Handling**  
-  By default the addon limits the palette size to 256 registers (as demanded by the DEC specification).
-  The limit can be increased to a maximum of 4096 registers (via `sixelPaletteLimit`).
-
-  The default palette is a mixture of VT340 colors (lower 16 registers), xterm colors (up to 256) and zeros (up to 4096).
-  There is no private/shared palette distinction, palette colors are always carried over from a previous sixel image.
-  Restoring the default palette size and colors is possible with `XTSMGRAPHICS 1 ; 2` (binary: `\x1b[?1;2S`).
-  It gets also restored automatically on RIS and DECSTR.
-
-  Other than on older terminals, the underlying SIXEL library applies colors immediately to individual pixels
-  (*printer mode*), thus it is technically possible to use more colors in one image than the palette has color slots.
-  This feature is called *high-color* in libsixel.
-
-  A terminal wide shared palette mode with late indexed coloring of the output is not supported,
-  therefore palette animations cannot be used.
-
-- **SIXEL Raster Attributes Handling**  
-  If raster attributes were found in the SIXEL data (level 2), the image will always be truncated to the given height/width extend. We deviate here from the specification on purpose, as it allows several processing optimizations. For level 1 SIXEL data without any raster attributes the image can freely grow in width and height up to the last data byte, which has a much higher processing penalty. In general encoding libraries should not create level 1 data anymore and should not produce pixel information beyond the announced height/width extend. Both is discouraged by the >30 years old specification.
-
-  Currently the SIXEL implementation of the addon does not take custom pixel sizes into account, a SIXEL pixel will map 1:1 to a screen pixel.
-
-- **IIP Support (iTerm's Inline Image Protocol)**  
-  Set by default, change it with `{iipSupport: true}`.
-
-  The IIP implementation has the following features / restrictions (sequence will silently fail for unmet conditions):
-  - Supported formats: PNG, JPEG and GIF
-  - No animation support.
-  - Image type hinting is not supported (always deducted from data header).
-  - File download is not supported.
-  - Filename gets parsed but not used.
-  - Strict base64 handling as of RFC4648 §4 (standard alphabet, optional padding, no separator bytes allowed).
-  - Payload size may not exceed CEIL(sizeParameter * 4 / 3).
-  - Image scaling beyond terminal viewport size is allowed (e.g. `width=200%`).
-  - Image pixel size is restricted by `pixelLimit` (pre- and post resizing).
-  - Size parameter is restricted by `iipSizeLimit`.
-  - Cursor positioning behaves the same as for sixel (see above).
-
-
-### Storage and Drawing Settings
-
-The internal storage holds images up to `storageLimit` (in MB, calculated as 4-channel RBGA unpacked, default 100 MB). Once hit images get evicted by FIFO rules. Furthermore images on the alternate buffer will always be erased on buffer changes.
-
-The addon exposes two properties to interact with the storage limits at runtime:
-- `storageLimit`  
-  Change the value to your needs at runtime. This is especially useful, if you have multiple terminal
-  instances running, that all add to one upper memory limit.
-- `storageUsage`  
-  Inspect the current memory usage of the image storage.
-
-By default the addon will show a placeholder pattern for evicted images that are still part
-of the terminal (e.g. in the scrollback). The pattern can be deactivated by toggling `showPlaceholder`.
-
-### Image Data Retrieval
-
-The addon provides the following API endpoints to retrieve raw image data as canvas:
-
-- `getImageAtBufferCell(x: number, y: number): HTMLCanvasElement | undefined`  
-  Returns the canvas containing the original image data (not resized) at the given buffer position.
-  The buffer position is the 0-based absolute index (including scrollback at top).
-
-- `extractTileAtBufferCell(x: number, y: number): HTMLCanvasElement | undefined`  
-  Returns a canvas containing the actual single tile image data (maybe resized) at the given buffer position.
-  The buffer position is the 0-based absolute index (including scrollback at top).
-  Note that the canvas gets created and data copied over for every call, thus it is not suitable for performance critical actions.
-
-### Memory Usage
-
-The addon does most image processing in Javascript and therefore can occupy a rather big amount of memory. To get an idea where the memory gets eaten, lets look at the data flow and processing steps:
-- Incomming image data chunk at `term.write` (terminal)  
-  `term.write` might stock up incoming chunks. To circumvent this, you will need proper flow control (see xterm.js docs). Note that with image output it is more likely to run into this issue, as it can create lots of MBs in very short time.
-- Sequence Parser (terminal)  
-  The parser operates on a buffer containing up to 2^17 codepoints (~0.5 MB).
-- Sequence Handler - Chunk Decoding (addon)  
-  Image data chunks are processed immediately by the SIXEL decoder (streamlined). The decoder allocates memory for image
-  pixels as needed. The allowed image size is restricted by `pixelLimit` (default 16M pixels), the decoder holds 2 pixel buffers at maximum during decoding (RGBA, ~128 MB for 16M pixels).
-- Sequence Handler - Image Finalization (addon) 
-  After decoding the final pixel buffer is grabbed by the sequence handler and written to a canvas of the same size (~64 MB for 16M pixels) and added to the storage.
-- Image Storage (addon)  
-  The image storage implements a FIFO cache, that will remove old images, if a new one arrives and `storageLimit` is hit (default 128 MB). The storage holds a canvas with the original image, and may additionally hold resized versions of images after a font rescaling. Both are accounted in `storageUsage` as a rough estimation of _pixels x 4 channels_.
-
-Following the steps above, a rough estimation of maximum memory usage by the addon can be calculated with these formulas (in bytes):
-```typescript
-// storage alone
-const storageBytes = storageUsage * storageLimit * 1024 * 1024;
-// decoding alone
-const decodingBytes = sixelSizeLimit + 2 * (pixelLimit * 4);
-
-// totals
-// inactive decoding
-const totalInactive = storageBytes;
-// active decoding
-const totalActive = storageBytes + decodingBytes;
-```
-
-Note that browsers have offloading tricks for rarely touched memory segments, esp. `storageBytes` might not directly translate into real memory usage. Usage peaks will happen during active decoding of multiple big images due to the need of 2 full pixel buffers at the same time, which cannot be offloaded. Thus you may want to keep an eye on `pixelLimit` under limited memory conditions.  
-Further note that the formulas above do not respect the Javascript object's overhead. Compared to the raw buffer needs the book keeping by these objects is rather small (<<5%).
-
-_Why should I care about memory usage at all?_  
-Well you don't have to, and it probably will just work fine with the addon defaults. But for bigger integrations, where much more data is held in the Javascript context (like multiple terminals on one page), it is likely to hit the engine's memory limit sooner or later under decoding and/or storage pressure.
-
-_How can I adjust the memory usage?_  
-- `pixelLimit`  
-  A constructor setting, thus you would have to anticipate, whether (multiple) terminals in your page gonna do lots of concurrent decoding. Since this is normally not the case and the memory usage is only temporarily peaking, a rather high value should work even with multiple terminals in one page.
-- `storageLimit`  
-  A constructor and a runtime setting. In conjunction with `storageUsage` you can do runtime checks and adjust the limit to your needs. If you have to lower the limit below the current usage, images will be removed in FIFO order and may turn into a placeholder in the terminal's scrollback (if `showPlaceholder` is set). When adjusting keep in mind to leave enough room for memory peaking for decoding.
-- `sixelSizeLimit`  
-  A constructor setting. This has only a small impact on peaking memory during decoding. It is meant to avoid processing of overly big or broken SIXEL sequences at an earlier phase, thus may stop the decoder from entering its memory intensive task for potentially invalid data.
-
-
-### Terminal Interaction
-
-- Images already on the terminal screen will reshape on font-rescaling to keep the terminal cell coverage intact.
-  This behavior might diverge from other terminals, but is in general the more desired one.
-- On terminal resize images may expand to the right automatically, if they were right-truncated before.
-  They never expand to the bottom, if they were bottom-truncated before (e.g. from scrolling-off).
-- Text autowrapping from terminal resize may break and wrap images into multiple parts. This is unfortunate,
-  but cannot be avoided, while sticking to the stronger terminal text-grid mechanics.
-  (Yes images are a second class citizen on a mainly text-driven interface.)
-- Characters written over an image will erase the image information for affected cells.
-- Images are painted above BG/FG data not erasing it. More advanced "composition tricks" like painting images
-  below FG/BG data are not possible. (We currently dont hook into BG/FG rendering itself.)
-- Previous image data at a cell will be erased on new image data. (We currently have no transparency composition.)
-
-
-### Performance & Latency
-
-- Performance should be good enough for occasional SIXEL output from REPLs, up to downscaled movies
-  from `mpv` with its SIXEL renderer (tested in the demo). For 3rd party xterm.js integrations this
-  furthermore depends highly on the overall incoming data throughput.
-- Image processing has a high latency. Most of the latency though is inherited from xterm.js' incoming data route
-  (PTY -> server process -> websocket -> xterm.js async parsing), where every step creates more waiting time.
-  Since we cannot do much about that "long line", keep that in mind when you try to run more demanding applications with realtime drawing and interactive response needs.
-
-
-### Status
-
-- Sixel support and image handling in xterm.js is considered beta quality.
-- IIP support is in alpha stage. Please file a bug for any awkwardities.
-
-
-### Changelog
-
-- 0.5.0 integrate with xtermjs base repo (at v0.4.3)
-- 0.4.3 defer canvas creation
-- 0.4.2 fix image canvas resize
-- 0.4.1 compat release for xterm.js 5.2.0
-- 0.4.0 IIP support
-- 0.3.1 compat release for xterm.js 5.1.0
-- 0.3.0 important change: worker removed from addon
-- 0.2.0 compat release for xterm.js 5.0.0
-- 0.1.3 bugfix: avoid striping
-- 0.1.2 bugfix: reset clear flag
-- 0.1.1 bugfixes:
-  - clear sticky image tiles on render
-  - create folder from bootstrap.sh
-  - fix peer dependency in package.json

addons/addon-image/fixture/endless.sh

@@ -1,22 +0,0 @@
-#!/bin/bash
-
-# sixel endless mode
-# Should print an endless sine curve, abort with Ctrl-C.
-
-period=200
-amplitude=50
-
-sixels=(@\$ A\$ C\$ G\$ O\$ _\$-)
-pi=$(echo "scale=10; 4*a(1)" | bc -l)
-run=true
-trap run=false INT
-
-echo -ne "\x1bP0;0;0q\"1;1#1;2;100;0;0#1"
-y=0
-while $run
-do
-  x=$(echo "s(2*${pi}*${y}/${period})*${amplitude}+2*${amplitude}+0.5" | bc -l)
-  echo -ne "!${x%%.*}?${sixels[$((y%6))]}"
-  (( y++ ))
-done
-echo -e "\x1b\\"

addons/addon-image/fixture/gcrglf.sh

@@ -1,52 +0,0 @@
-#!/bin/bash
-
-# GLF should move the text cursor downwards,
-# even if no pixels were modified,
-# when sixel scrolling is on.
-
-echo -n $'\e[?80l'		# Ensure sixel scrolling is on (disable DECSDM)
-
-clear
-echo "A test of Sixel GLF (Graphics Line Feed) when sixel scrolling is on"
-echo
-
-# Move cursor down three using GLF ("-")
-echo -e '\x1bPq$-$-$-$-\x1b\\'
-
-# Show a single sixel line that says, "Your terminal ->"
-cat <<'EOF'
-P0;0;0q"1;1;244;21#0;2;0;0;0#1;2;80;80;80#0~~~NFFFN~~~n!4FN!68~NFN!64~bbb!42~rbbbBB!41~$#1???owwwo???O!4wo!68?owo!64?[[[!42?K[[[{{-#0!5~{woBFB`o{}!4~NFBpp!4xpbBF~~~x@@@~~~xxp@@!5~xxp@@b`pxwxpz!17~zpp???!5px!5~NFBpxxwxxpBBN!4~xxp@@b`pxwxpz~x@@@xxp@@pxx@@F!4~xppp@@!8~x@@@pxxwxp@B!5~zxXXXWXX@BF!10~??!24~!10^FNN^~~~$#1!5?BFN{w{]NB@!4?ow{MM!4EM[{w???E}}}???EEM}}!5?EEM}}[]MEFEMC!17?CMM~~~!5ME!5?ow{MEEFEEM{{o!4?EEM}}[]MEFEMC?E}}}EEM}}MEE}}w!4?EMMM}}!8?E}}}MEEFEM}{!5?CEeeefee}{w!10?~~!24?!10_woo_-#0!5~nFFF??FFN!5~wo_FF!4NFb_o!4~{o_!4Ffb??Fn~~~NFF??!4FN!23~_??!5NFFn~~~w__C!7KCC!4~NFF??!4FN!4~N???N~~??Fn~???N~~N!4F??!4Fn~~~F???Fn~~nF??Fn~~p??KMMMEE???Fn~~~N!4F??!4Fn!29~{{}!4~$#1!5?Owww~~wwo!5?FN^ww!4ow[^N!4?BN^!4wW[~~wO???oww~~!4wo!23?^~~!5owwO???F^^z!7rzz!4?oww~~!4wo!4?o~~~o??~~wO?~~~o??o!4w~~!4wO???w~~~wO??Ow~~wO??M~~rpppxx~~~wO???o!4w~~!4wO!29?BB@-#0!25FE!63FE!15FE!77FE!60F$#1!25?@!63?@!15?@!77?@-\
-EOF
-
-sleep 1
-tput cup 2 30
-
-# Show four lines saying, "<- A genuine VT340 would end here"
-cat <<'EOF'
-P0;0;0q"1;1;144;80#0;2;0;0;0#1;2;80;80;80#0~~rpp@@`@BN!25~!11^!5~^^^N^^^!6~!7^N^^^!5~!4^~~~!5^!6~^^^WWW!8~!7^N^^^!8~^^^N^^^!5~$#1??KMM}}]}{o!25?!11_!5?___o___!6?!7_o___!5?!4_???!5_!6?___fff!8?!7_o___!8?___o___-#0~~NB??EFE??@F^!19~B??{!4}{W??}}~~B@?K!5MK??B~~~}???{!4}{??!4~}???~~~}}{??!6~}{{{??!8~}???{!4}{??!4~B@?K!5MK??B~~$#1??o{~~xwx~~}w_!19?{~~B!4@Bf~~@@??{}~r!5pr~~{???@~~~B!4@B~~!4?@~~~???@@B~~!6?@BBB~~!8?@~~~B!4@B~~!4?{}~r!5pr~~{-#0rpoopr~~~zpooopr!17~}{ww!4pwW??!4~}wwprrb!4rpp~~~pooopz~~zpoopz!4~{w!4pxwoopz~~~r!4poo!4pz~~~pooopz~~zpoopz~~}wwprrb!4rpp~~$#1KMNNMK???CMNNNMK!17?@BFF!4MFf~~!4?@FFMKK[!4KMM???MNNNMC??CMNNMC!4?BF!4MEFNNMC???K!4MNN!4MC???MNNNMC??CMNNMC??@FFMKK[!4KMM-#0!32~^NNNKWwww[[MNNN^~!13N!5~NN!5FNN^!10~N!4F!8~NN!4FN^!36~$#1!32?_ooorfFFFbbpooo_?!13o!5?oo!5woo_!10?o!4w!8?oo!4wo_-#0!32~}{o?AM!4~E?_w}}~o_o}}???}}}__!5~}}~fFFFAOw!6~^FB_w{???!6~B??}!4~{??!35~$#1!32?@BN~|p!4?x~^F@@?N^N@@~~~@@@^^!5?@@?Wwww|nF!6?_w{^FB~~~!6?{~~@!4?B~~-#0!36~{_?FB?o}!7~^NN???NN^!6~!8NE?_x!4~poooP@@???X!5~{o?F!4NB_o!35~$#1!36?B^~w{~N@!7?_oo~~~oo_!6?!8ox~^E!4?MNNNm}}~~~e!5?BN~w!4o{^N-#0!38~}}}!11~!8}!8~!6}!13~!6}!9~!4}!38~$#1!38?@@@!11?!8@!8?!6@!13?!6@!9?!4@-#0!5^!5~!5^!5~!7^!6~!4^~~~!5^!6~{www??!11~^^^N^\W???!22~^^^N^^^!6~!7^N^^^!8~^^^N^\W???~~$#1!5_!5?!5_!5?!7_!6?!4_???!5_!6?BFFF~~!11?___o_af~~~!22?___o___!6?!7_o___!8?___o_af~~~-#0}{??CMB@@FM??o{~~B@?{{!4}{w?@~~~}???~~~}}{??!10~??!8~B??{!5}{???!19~B@?K!5MK??B~~~}???{!4}{??!4~B??{!5}{???~~$#1@B~~zp{}}wp~~NB??{}~BB!4@BF~}???@~~~???@@B~~!10?~~!8?{~~B!5@B~~~!19?{}~r!5pr~~{???@~~~B!4@B~~!4?{~~B!5@B~~~-#0~~~woow~}woo{!4~}{wpprbrrpww{!5~{w!4pxwoopz~~~r!4poo!4pz~~~}{ww!5pwooopz!17~}wwprrb!4rpp~~~pooopz~~zpoopz~~}{ww!5pwooopz$#1???FNNF?@FNNB!4?@BFMMK[KKMFFB!5?BF!4MEFNNMC???K!4MNN!4MC???@BFF!5MFNNNMC!17?@FFMKK[!4KMM???MNNNMC??CMNNMC??@BFF!5MFNNNMC-#0!40~n!4F!99~$#1!40?O!4w-#0!10~^^n!29~???b!4rbBF!4~^NFbrrprrbFF^!4~rrbBBFBbrrrbv~~^NFbrrprrbFF^!42~$#1!10?__O!29?~~~[!4K[{w!4?_ow[KKMKK[ww_!4?KK[{{w{[KKK[G??_ow[KKMKK[ww_-#0!9~}{wq!10}!18~N???N^~~^N??N^~~o??H!6XWGG!4~^NN??!4N^!5~o??H!6XWGG!42~$#1!9?@BFL!10@!18?o~~~o_??_o~~o_??N~~u!6efvv!4?_oo~~!4o_!5?N~~u!6efvv-#0!41B!6ABB!6A!5BAAA?!6A!4B!10A!8BAAA?!6A!42B$#1!41?!6@??!6@!5?@@@B!6@!4?!10@!8?@@@B!6@$-\This text should be indented.
-EOF
-
-# For more details, please see:
-# https://github.com/jerch/xterm-addon-image/issues/37
-
-# By default, sixel is in a 2:1 aspect ratio, which means
-# every sixel graphics linefeed (GLF) adds another 12 pixels.
-# With four GLFs, we have five sixel lines = 5 * 12 =  60 pixels.
-
-# Which text line that ends up on depends upon the height of your
-# font. On the VT340, the font is 20 pixels high. 
-
-# On a VT340 sixel scrolling is on by default. DEC refers to this by
-# two different names "sixel scrolling" and its negation, "DECSDM"
-# (Sixel Display Mode). They control the same thing, so when DECSDM is
-# on, sixel scrolling is off, and vice versa. 
-
-# When DECSDM is on, the graphic line feeds do not affect the text cursor.
-
-
-# How hackerb9 created the two sixel test images:
-#
-# convert -family "Courier" -style normal -density 72 -pointsize 26 -interline-spacing -12 -gravity center -fill gray80 -background none label:$'A genuine\nVT340\nwould end\n← here  '  +trim +dither -colors 2 sixel:- > reference.six
-#
-# convert -family "Courier" -style normal -density 72 -pointsize 26 -interline-spacing -12 -gravity center -fill gray80 -background none label:$'Your terminal →'  +trim -bordercolor none -border 2 +dither -colors 2 sixel:- > yourterminal.six
-

addons/addon-image/fixture/growing_rect.js

@@ -1,44 +0,0 @@
-const sixelEncode = require('../node_modules/sixel/lib/SixelEncoder').image2sixel;
-const toRGBA8888 = require('../node_modules/sixel/lib/Colors').toRGBA8888;
-
-function createRect(size, color) {
-  const pixels = new Uint32Array(size * size);
-  pixels.fill(toRGBA8888(...color));
-  return sixelEncode(new Uint8ClampedArray(pixels.buffer), size, size);
-}
-
-function createRectMinusOne(size, color) {
-  const pixels = new Uint32Array(size * size);
-  if (size - 1) {
-    const sub = new Uint32Array(size - 1);
-    sub.fill(toRGBA8888(...color));
-    const last = size * (size - 1);
-    for (let y = 0; y < last; y += size) {
-      pixels.set(sub, y);
-    }
-  }
-  return sixelEncode(new Uint8ClampedArray(pixels.buffer), size, size);
-}
-
-async function main() {
-  // clear + cursor and sixelScrolling off
-  process.stdout.write('\x1b[2J\x1b[?25;80h');
-
-  for (let i = 1; i < 300; ++i) {
-    await new Promise(res => setTimeout(() => {
-      process.stdout.write(createRect(i, [0, 255, 0]));
-      res();
-    }, 5));
-  }
-  for (let i = 299; i >= 1; --i) {
-    await new Promise(res => setTimeout(() => {
-      process.stdout.write(createRectMinusOne(i, [0, 255, 0]));
-      res();
-    }, 5));
-  }
-
-  // re-enable cursor and sixel scrolling
-  process.stdout.write('\x1b[2J\x1b[?25;80l');
-}
-
-main();

addons/addon-image/fixture/iip/palette.iip

@@ -1 +0,0 @@
-]1337;File=inline=1;size=525;name=Li4vcGFsZXR0ZS5wbmc=: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

addons/addon-image/fixture/iip/w3c_gif.iip

@@ -1 +0,0 @@
-]1337;File=inline=1;size=1667;name=Li4vdGVzdGltYWdlcy93M2NfaG9tZV8yNTYuZ2lm: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

addons/addon-image/fixture/iip/w3c_jpg.iip

@@ -1 +0,0 @@
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addons/addon-image/fixture/iip/w3c_png.iip

@@ -1 +0,0 @@
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addons/addon-image/fixture/inspect_palette.sh

@@ -1,67 +0,0 @@
-#!/bin/bash
-
-function print_palette() {
-  L=$(( LOWER / 256))
-  U=$(( (UPPER-1) / 256))
-  for ((p = $L; p <= $U; p++))
-  do
-    echo "slot $((p*256))..$((p*256+255)):"
-    echo -ne "\x1bP;1q"
-    for i in {0..15}
-    do
-      a=$((i * 16 + p * 256))
-      for j in {0..15}
-      do
-        echo -ne "#$((a+j))!6~"
-      done
-      echo -ne "\$-"
-    done
-    echo -e "\x1b\\"
-  done
-}
-
-colors=undefined
-max_colors=undefined
-
-echo "Terminal Reports (XTSMGRAPHICS):"
-IFS=";" read -a REPLY -s -t 1 -d "S" -p $'\e[?1;1;0S'
-[[ ${REPLY[1]} == "0" ]] && colors=${REPLY[2]}
-echo "active colors: ${colors}"
-
-IFS=";" read -a REPLY -s -t 1 -d "S" -p $'\e[?1;4;0S'
-[[ ${REPLY[1]} == "0" ]] && max_colors=${REPLY[2]}
-echo "max colors   : ${max_colors}"
-echo
-
-
-# query up to colors by default
-# if colors is undefined (no XTSMGRAPHICS), assume 256
-ARG1=${1:-${colors}}
-if [[ $colors == "undefined" ]]
-then
-  ARG1=${1:-256}
-fi
-LOWER=0
-UPPER=$ARG1
-ARG2=${2:-undefined}
-if [[ $ARG2 != "undefined" ]]
-then
-  LOWER=ARG1
-  UPPER=ARG2
-fi
-
-if [[ $colors != "undefined" ]]
-then
-  if [[ $colors -lt $UPPER ]] || [[ $colors -lt 256 ]]
-  then
-    echo -e "\x1b[33mNote: Active colors is smaller than test range."
-    echo -e "A spec-conform terminal may repeat colors in 'slot mod ${colors}'.\x1b[m"
-    echo
-  fi
-else
-  echo -e "\x1b[33mNote: Cannot query active colors."
-  echo -e "The terminal may repeat colors beyond it max slot (e.g. slot mod 16).\x1b[m"
-  echo
-fi
-
-print_palette

addons/addon-image/fixture/overdraw.sh

@@ -1,141 +0,0 @@
-#!/bin/bash
-
-function smiling_smiley() {
-  echo -ne '\x1bP;2q"1;1;60;60
-#6!60~$-
-!60~$-
-!60~$
-!15?#1!4]!22?!4]$-
-#6!60~$-
-!60~$-
-!60~$-
-!60~$
-!15?#1!4~!22?!4~$-
-#6!60~$
-!15?#1!30N$-
-#6!60~$-
-!60~$-
-'
-  echo -ne '\x1b\\'
-}
-
-function indifferent_smiley() {
-  echo -ne '\x1bP;2q"1;1;60;60
-#6!60~$-
-!60~$-
-!60~$
-!15?#1!4]!22?!4]$-
-#6!60~$-
-!60~$-
-!60~$-
-!60~$-
-!60~$
-!15?#1!30N$-
-#6!60~$-
-!60~$-
-'
-  echo -ne '\x1b\\'
-}
-
-function sad_smiley() {
-  echo -ne '\x1bP;2q"1;1;60;60
-#6!60~$-
-!60~$-
-!60~$
-!15?#1!4]!22?!4]$-
-#6!60~$-
-!60~$-
-!60~$-
-!60~$-
-!60~$
-!15?#1!30N$
-!15?#1!4o!22?!4o$-
-#6!60~$
-!15?#1!4B!22?!4B$-
-#6!60~$-
-'
-  echo -ne '\x1b\\'
-}
-
-function smiling_smiley_slim() {
-  echo -ne '\x1bP;1q"1;1;60;60
-$-
-$-
-$-
-$-
-$-
-$-
-!15?#1!4~!22?!4~$-
-!15?#1!30N
-'
-  echo -ne '\x1b\\'
-}
-
-function indifferent_smiley_slim() {
-  echo -ne '\x1bP;1q"1;1;60;60
-$-
-$-
-$-
-$-
-$-
-$-
-!15?#6!4~!22?!4~$-
-!15?!4o!22?!4o$ !15?#1!30N$-
-!15?#6!4B!22?!4B
-'
-  echo -ne '\x1b\\'
-}
-
-function sad_smiley_slim() {
-  echo -ne '\x1bP;1q"1;1;60;60
-$-
-$-
-$-
-$-
-$-
-$-
-$-
-!15?#1!30N$
-!15?#1!4o!22?!4o$-
-!15?#1!4B!22?!4B$-
-'
-  echo -ne '\x1b\\'
-}
-
-function full() {
-  smiling_smiley
-  sleep .5
-  indifferent_smiley
-  sleep .5
-  sad_smiley
-  sleep .5
-  indifferent_smiley
-  sleep .5
-  smiling_smiley
-}
-
-function slim() {
-  smiling_smiley
-  sleep .5
-  indifferent_smiley_slim
-  sleep .5
-  sad_smiley_slim
-  sleep .5
-  indifferent_smiley_slim
-  sleep .5
-  smiling_smiley_slim
-}
-
-# clear screen and place cursor to 1;10
-echo -ne '\x1b[2J\x1b[10;1H'
-
-# switch sixel scrolling off
-echo -ne '\x1b[?80h'
-
-case "$1" in
-  full ) full ;;
-  slim ) slim ;;
-esac
-
-# re-enable sixel scrolling
-echo -ne '\x1b[?80l'

addons/addon-image/fixture/textcursor.sh

@@ -1,288 +0,0 @@
-#!/bin/bash
-
-# Test cursor row, column placement after sixel image is sent.
-
-# After a sixel image is displayed, the text cursor is moved to the
-# row of the last sixel cursor position, but the column stays the same
-# as it was before the sixel image was sent.
-#
-# This can be thought of as sixel images always ending with an
-# implicit Graphics Carriage Return (`$`). 
-
-# ADDENDUM: It is not as simple as I thought. When a row of sixels
-# straddles two rows of text, the text cursor can be left on the upper row.
-# It seems up to three lines of pixels may be beneath any words printed.
-#
-# The rule for when this happens is not obvious to me, but can be seen
-# with images of height: 21, 22, 23, 24, 41, 42, 81, 82, 83, 84...
-#
-# My guess:
-# for a sixel image of height h, let a=(h-1)%6 and b=(h-1)%20,
-# then, the text will overlap the image when a>b.
-#
-# If that is the case, then the entire list of heights for which this
-# will happen on the VT340's 480 pixel high screen is:
-#
-#  21  22  23  24   41  42   81  82  83  84
-# 101 102  141 142 143 144  161 162 
-# 201 202 203 204  221 222  261 262 263 264  281 282 
-# 321 322 323 324  341 342  381 382 383 384
-# 401 402  441 442 443 444  461 462
-#
-# Note that there are 48 entries, so that means there's a 10% chance
-# if heights are chosen randomly from 1 to 480. However, if one were
-# to always pick heights which are a multiple of the character cell
-# height (20px), then the chances are 0% as there are no problematic
-# heights divisible by 20. 
-
-
-# Sixel images often do *not* end with a `-` (Graphics New Line = GNL)
-# which sends the sixel cursor down 6 pixels. Any text printed next
-# will potentially overlap the last row of sixels!
-
-# I am not yet positive, but I believe that, in general, applications
-# should send sixel images without a GNL but then send `^J`, a text
-# newline (NL), before displaying more text or graphics.
-
-# IMPORTANT: sometimes neither a graphics nor a text newline is wanted. 
-# For example, if an image is full screen, either newline would cause
-# the top line to scroll off the screen.
-
-#         | Text cursor column | Text cursor row
-# --------|--------------------|-------------------------------------
-# !GNL !NL| Unchanged	       | Overlapping last line of graphics
-# !GNL  NL| Column=1	       | First line immediately after graphic (usually)
-#  GNL !NL| Unchanged	       | _Sometimes_ overlapping graphics
-#  GNL  NL| Column=1	       | First *or* second line after graphic
-
-
-CSI=$'\e['			# Control Sequence Introducer 
-DCS=$'\eP'			# Device Control String
-ST=$'\e\\'			# String Terminator
-
-set_cursor_pos() {
-    # Home, top left is row 1, col 1.
-    local row=$1 col=$2
-    echo -n ${CSI}${row}';'${col}'H'
-}
-
-reset_palette() {
-    # Send DECRSTS to load colors from a Color Table Report
-    echo -n ${DCS}'2$p'
-
-    echo -n "0;2;0;0;0/"        # VT color #0 is black and BG text color
-
-    echo -n "1;2;20;20;79/"	# VT color #1 is blue
-    echo -n "2;2;79;13;13/"	# VT color #2 is red
-    echo -n "3;2;20;79;20/"	# VT color #3 is green
-
-    echo -n "4;2;79;20;79/"	# VT color #4 is magenta
-    echo -n "5;2;20;79;79/"	# VT color #5 is cyan
-    echo -n "6;2;79;79;20/"	# VT color #6 is yellow
-
-    echo -n "7;2;46;46;46/"	# VT color #7 is gray 50% and FG text color
-    echo -n "8;2;26;26;26/"	# VT color #8 is gray 25%
-
-    echo -n "9;2;33;33;59/"	# VT color #9 is pastel blue
-    echo -n "10;2;59;26;26/"	# VT color #10 is pastel red
-    echo -n "11;2;33;59;33/"	# VT color #11 is pastel green
-
-    echo -n "12;2;59;33;59/"	# VT color #12 is pastel magenta
-    echo -n "13;2;33;59;59/"	# VT color #13 is pastel cyan
-    echo -n "14;2;59;59;33/"	# VT color #14 is pastel yellow
-
-    echo -n "15;2;79;79;79"	# VT color #15 is gray 75% and BOLD text color
-
-    echo -n ${ST}		# String Terminator
-}
-
-# Generate square of size w with final graphics new line removed
-square() {
-    # Given a color index number and (optionally) a size, row, and column, 
-    # draw a square with top left corner at (row, column) and of size×size px.
-    # Default size 100×100px  (10cols, 5 rows)
-
-    local -i color=${1:-1}	# Default is color index 1 (blue)
-    local -i size=${2:-100}	# Size in pixels (defaults to 100)
-    local -i row=$3 column=$4	# If set to 0, cursor is not moved
-
-    if [[ row -ne 0 && column -ne 0 ]]; then
-	set_cursor_pos $row $column
-    fi
-
-    # Draw a square of the right color & size 
-    squaresize $color $size
-}
-
-squaresize() {
-    # Helper for square() that uses convert to return a  sixel square of
-    # the right color ($1) and size ($2).
-
-    # Similar to this but with variable size squares:
-    #    echo -n ${DCS}'0;0;0q"1;1;100;100#'${color}'!100~-!100~-!100~-!100~-!100~-!100~-!100~-!100~-!100~-!100~-!100~-!100~-!100~-!100~-!100~-!100~-!100N'${ST}
-
-
-    local color=${1:-1}			# Default color index is 1 (blue)
-    local size=${2:-100}		# Default size is 100x100
-
-    # Get a sixel string 
-    local sq=$(convert -geometry ${size}x${size} xc:black sixel:-)
-
-    # Remove ImageMagick's extraneous Graphic New Line at end of image.
-    sq=${sq%-??}$'\e\\'
-
-    # VT340s always used the same color register for the first sixel
-    # color defined no matter what number it was assigned. That means,
-    # each time we send a new sixel image, the previous one's color
-    # palette gets changed. We don't want squares of all the same
-    # color, so remove the color definition and just use the defaults.
-    sq=${sq/\#0;2;0;0;0/}
-
-    # And finally, switch to the proper index for the color we want.
-    echo -n ${sq//\#0/#${color}}
-}
-
-squaregnl() {
-    # Same as square(), but sends a graphics newline at the end of the sixels.
-    # (Sticks a `-` before the String Terminator, "Esc \")
-    sq=$(square "${@}")
-    echo -n ${sq%??}$'-\e\\'
-}
-
-
-main() {
-    clear
-    reset_palette
-    show_labels
-    neither_graphic_nor_text 96 4 4 31 		# size, color, row, column
-    text_newline_only 96 9 4 1
-    text_newline_only 84 9 4 14
-    graphics_new_line_only 100 1 4 51
-    graphics_new_line_only 96 1 4 64
-    set_cursor_pos 1000 1
-}
-
-
-neither_graphic_nor_text() {
-    # Typically sixel images should not end with a Graphics New Line (GNL)
-    # However, if a text newline isn't sent, there will be overlap.
-
-    local -i size  color  row  column
-    read size color row column <<<"$@"
-
-    set_cursor_pos $((row++)) $column
-    echo -n "Height $size"
-    set_cursor_pos $((row++)) $column
-
-    # Three squares sent as separate sixel images, indented +1 
-    for i in {1..3}; do
-	square $((color++)) $size
-	tput cuf 1
-    done
-
-    echo -n "overlap?"
-}
-
-
-text_newline_only() {
-    # USING A TEXT NEWLINE (NL) after an sixel image that does NOT
-    # have GNL is probably the best way to be on the text line
-    # immediately below the image. However, the text will still
-    # occasionally overlap the last four rows of pixels.
-
-    # Also, if multiple images are intended to be shown, there will
-    # usually be a gap between them when using a text newline.
-
-    # Overlap happens because the height of a text cell is 20 pixels
-    # and the height of a sixel is 6. 
-    # for (h=0; h<480; h++) if ((h-1)%6 > (h-1)%20 ) { h }
-
-    # Let the pixel position of the top of the graphics cursor be 'Yg'
-    # and let the pixel position of the top of the corresponding cell
-    # of text which the text cursor will be placed on be 'Yt'. Note
-    # that Yg is evenly divisible by 6 and Yt, by 20. Taking the
-    # remainder, r, after dividing Yg by 20 tells us how many pixels
-    # down into a row of text the last line of sixels started. When
-    # r==0, the sixels started at the top of the text row.
-
-    # When r = 14, the sixels covered the bottom six pixels on the row
-    # of text. When 14 < r < 20, the sixel line impinged by r - 14
-    # pixels into the text row below and there is a chance the next
-    # text printed will overlap. 
-
-
-    local -i size  color  row  column
-    read size color row column <<<"$@"
-
-    local -i offset
-    offset=$((column-1))
-
-    set_cursor_pos $row 1
-
-    if ((offset)); then tput cuf $((offset)); fi
-    echo "Height $size"
-
-    # Three squares, separated by text new lines and indented +1 
-    for i in {1..3}; do
-	if ((offset)); then tput cuf $offset; fi
-	square $((color++)) $size
-	offset=offset+1
-	echo
-    done
-
-    tput cuf $((offset))
-    echo -n "overlap?"
-}
-
-graphics_new_line_only() {
-    # However, some sixel images end with a `-`, a Graphics New Line.
-    # This can be useful for writing another image starting at the same
-    # column without having to reposition the cursor.
-    #
-    # However, this runs the risk of having occasional overlap.
-
-    local -i size  color  row  column
-    read size color row column <<<"$@"
-
-    set_cursor_pos $((row++)) $column
-    echo -n "Height $size"
-    set_cursor_pos $((row++)) $column
-
-    # Three squares, separated by graphics new lines and indented +1 
-    for i in {1..3}; do
-	squaregnl $((color++))  $size
-	tput cuf 1
-    done
-
-    echo -n "overlap?"
-}
-
-
-show_labels() {
-    set_cursor_pos 1 10
-    echo -n "Should sixel images include a GNL ('-') at the end?"
-
-    set_cursor_pos 3 29
-    echo -n "Neither NL nor GNL"
-    set_cursor_pos 3 1
-    echo -n "Text New Line only"
-    set_cursor_pos 3 51
-    echo -n "Graphics New Line only"
-
-    set_cursor_pos 22 29
-    echo -n "Always overlaps"		# Neither NL nor GNL
-
-    set_cursor_pos 22 3
-    echo -n "Overlaps a little"		# NL only
-    set_cursor_pos 23 3
-    echo -n "    Gaps a little"		# NL only
-
-    set_cursor_pos 22 54
-    echo -n "Overlaps badly"		# GNL only
-    set_cursor_pos 23 54
-    echo -n "Never gaps"		# GNL only
-}
-
-
-main
-

addons/addon-image/package.json

@@ -1,30 +0,0 @@
-{
-  "name": "@xterm/addon-image",
-  "version": "0.9.0",
-  "author": {
-    "name": "The xterm.js authors",
-    "url": "https://xtermjs.org/"
-  },
-  "main": "lib/addon-image.js",
-  "module": "lib/addon-image.mjs",
-  "types": "typings/addon-image.d.ts",
-  "repository": "https://github.com/xtermjs/xterm.js/tree/master/addons/addon-image",
-  "license": "MIT",
-  "keywords": [
-    "terminal",
-    "image",
-    "sixel",
-    "xterm",
-    "xterm.js"
-  ],
-  "scripts": {
-    "prepackage": "../../node_modules/.bin/tsgo -p .",
-    "package": "../../node_modules/.bin/webpack",
-    "prepublishOnly": "npm run package",
-    "start": "node ../../demo/start"
-  },
-  "devDependencies": {
-    "sixel": "^0.16.0",
-    "xterm-wasm-parts": "^0.4.1"
-  }
-}

addons/addon-image/src/IIPHandler.ts

@@ -1,175 +0,0 @@
-/**
- * Copyright (c) 2023 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-import { IImageAddonOptions, IOscHandler, IResetHandler, ITerminalExt } from './Types';
-import { ImageRenderer } from './ImageRenderer';
-import { IIPImageStorage } from './IIPImageStorage';
-import { CELL_SIZE_DEFAULT } from './ImageStorage';
-import Base64Decoder from 'xterm-wasm-parts/lib/base64/Base64Decoder.wasm';
-import QoiDecoder from 'xterm-wasm-parts/lib/qoi/QoiDecoder.wasm';
-import { HeaderParser, IHeaderFields, HeaderState } from './IIPHeaderParser';
-import { imageType, UNSUPPORTED_TYPE } from './IIPMetrics';
-
-// Local const enum mirror - esbuild can't inline const enums from external packages
-const enum DecoderConst {
-  // Limit held memory in base64 decoder (encoded bytes).
-  KEEP_DATA = 4194304,
-  // Initial buffer allocation for the decoder.
-  INITIAL_DATA = 1048576,
-  // Local mirror of const enum (esbuild can't inline const enums from external packages)
-  OK = 0
-}
-
-// default IIP header values
-const DEFAULT_HEADER: IHeaderFields = {
-  name: 'Unnamed file',
-  size: 0,
-  width: 'auto',
-  height: 'auto',
-  preserveAspectRatio: 1,
-  inline: 0
-};
-
-
-export class IIPHandler implements IOscHandler, IResetHandler {
-  private _aborted = false;
-  private _hp = new HeaderParser();
-  private _header: IHeaderFields = DEFAULT_HEADER;
-  private _dec: Base64Decoder;
-  private _qoiDec: QoiDecoder;
-  private _metrics = UNSUPPORTED_TYPE;
-
-  constructor(
-    private readonly _opts: IImageAddonOptions,
-    private readonly _renderer: ImageRenderer,
-    private readonly _storage: IIPImageStorage,
-    private readonly _coreTerminal: ITerminalExt
-  ) {
-    const maxEncodedBytes = Math.ceil(this._opts.iipSizeLimit * 4 / 3);
-    const initialBytes = Math.min(DecoderConst.INITIAL_DATA, maxEncodedBytes);
-    this._dec = new Base64Decoder(DecoderConst.KEEP_DATA, maxEncodedBytes, initialBytes);
-    this._qoiDec = new QoiDecoder(DecoderConst.KEEP_DATA);
-  }
-
-  public reset(): void {}
-
-  public start(): void {
-    this._aborted = false;
-    this._header = DEFAULT_HEADER;
-    this._metrics  = UNSUPPORTED_TYPE;
-    this._hp.reset();
-  }
-
-  public put(data: Uint32Array, start: number, end: number): void {
-    if (this._aborted) return;
-
-    if (this._hp.state === HeaderState.END) {
-      if ((this._dec.put(data.subarray(start, end)) as number) !== DecoderConst.OK) {
-        this._dec.release();
-        this._aborted = true;
-      }
-    } else {
-      const dataPos = this._hp.parse(data, start, end);
-      if (dataPos === -1) {
-        this._aborted = true;
-        return;
-      }
-      if (dataPos > 0) {
-        this._header = Object.assign({}, DEFAULT_HEADER, this._hp.fields);
-        if (!this._header.inline || !this._header.size || this._header.size > this._opts.iipSizeLimit) {
-          this._aborted = true;
-          return;
-        }
-        this._dec.init();
-        if ((this._dec.put(data.subarray(dataPos, end)) as number) !== DecoderConst.OK) {
-          this._dec.release();
-          this._aborted = true;
-        }
-      }
-    }
-  }
-
-  public end(success: boolean): boolean | Promise<boolean> {
-    if (this._aborted) return true;
-
-    let w = 0;
-    let h = 0;
-
-    // early exit condition chain
-    let cond: number | boolean = true;
-    if (cond = success) {
-      if (cond = !this._dec.end()) {
-        if (cond = this._dec.data8.length === this._header.size) {
-          this._metrics = imageType(this._dec.data8);
-          if (cond = this._metrics.mime !== 'unsupported') {
-            w = this._metrics.width;
-            h = this._metrics.height;
-            if (cond = w && h && w * h < this._opts.pixelLimit) {
-              [w, h] = this._resize(w, h).map(Math.floor);
-              cond = w && h && w * h < this._opts.pixelLimit;
-            }
-          }
-        }
-      }
-    }
-    if (!cond) {
-      this._dec.release();
-      return true;
-    }
-
-    let blob: Blob | ImageData;
-    if (this._metrics.mime === 'image/qoi') {
-      const data = this._qoiDec.decode(this._dec.data8);
-      blob = new ImageData(
-        new Uint8ClampedArray(data.buffer, data.byteOffset, data.byteLength),
-        this._qoiDec.width,
-        this._qoiDec.height
-      );
-      this._qoiDec.release();
-      if (w === this._qoiDec.width && h === this._qoiDec.height) {
-        // use fast-path if we don't need to rescale
-        this._dec.release();
-        const canvas = ImageRenderer.createCanvas(undefined, this._qoiDec.width, this._qoiDec.height);
-        canvas.getContext('2d')?.putImageData(blob, 0, 0);
-        this._storage.addImage(canvas);
-        return true;
-      }
-    } else {
-      blob = new Blob([this._dec.data8], { type: this._metrics.mime });
-    }
-    this._dec.release();
-    return createImageBitmap(blob, { resizeWidth: w, resizeHeight: h })
-      .then(bm => {
-        this._storage.addImage(bm);
-        return true;
-      });
-  }
-
-  private _resize(w: number, h: number): [number, number] {
-    const cw = this._renderer.dimensions?.css.cell.width || CELL_SIZE_DEFAULT.width;
-    const ch = this._renderer.dimensions?.css.cell.height || CELL_SIZE_DEFAULT.height;
-    const width = this._renderer.dimensions?.css.canvas.width || cw * this._coreTerminal.cols;
-    const height = this._renderer.dimensions?.css.canvas.height || ch * this._coreTerminal.rows;
-
-    const rw = this._dim(this._header.width!, width, cw);
-    const rh = this._dim(this._header.height!, height, ch);
-    if (!rw && !rh) {
-      const wf = width / w;         // TODO: should this respect initial cursor offset?
-      const hf = (height - ch) / h; // TODO: fix offset issues from float cell height
-      const f = Math.min(wf, hf);
-      return f < 1 ? [w * f, h * f] : [w, h];
-    }
-    return !rw
-      ? [w * rh / h, rh]
-      : this._header.preserveAspectRatio || !rw || !rh
-        ? [rw, h * rw / w] : [rw, rh];
-  }
-
-  private _dim(s: string, total: number, cdim: number): number {
-    if (s === 'auto') return 0;
-    if (s.endsWith('%')) return parseInt(s.slice(0, -1)) * total / 100;
-    if (s.endsWith('px')) return parseInt(s.slice(0, -2));
-    return parseInt(s) * cdim;
-  }
-}

addons/addon-image/src/IIPHeaderParser.test.ts

@@ -1,138 +0,0 @@
-/**
- * Copyright (c) 2023 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-import { assert } from 'chai';
-import { HeaderParser, HeaderState, IHeaderFields } from './IIPHeaderParser';
-
-
-const CASES: [string, IHeaderFields][] = [
-  ['File=size=123456;name=dGVzdA==:', {name: 'test', size: 123456}],
-  ['File=size=123456;name=dGVzdA:', {name: 'test', size: 123456}],
-  // utf-8 encoding in name
-  ['File=size=123456;name=w7xtbMOkdXTDnw==:', {name: 'ümläutß', size: 123456}],
-  ['File=size=123456;name=w7xtbMOkdXTDnw:', {name: 'ümläutß', size: 123456}],
-  // full header spec
-  [
-    'File=inline=1;width=10px;height=20%;preserveAspectRatio=1;size=123456;name=w7xtbMOkdXTDnw:',
-    {
-      inline: 1,
-      width: '10px',
-      height: '20%',
-      preserveAspectRatio: 1,
-      size: 123456,
-      name: 'ümläutß'
-    }
-  ],
-  [
-    'File=inline=1;width=auto;height=20;preserveAspectRatio=1;size=123456;name=w7xtbMOkdXTDnw:',
-    {
-      inline: 1,
-      width: 'auto',
-      height: '20',
-      preserveAspectRatio: 1,
-      size: 123456,
-      name: 'ümläutß'
-    }
-  ]
-];
-
-function fromBs(bs: string): Uint32Array {
-  const r = new Uint32Array(bs.length);
-  for (let i = 0; i < r.length; ++i) r[i] = bs.charCodeAt(i);
-  return r;
-}
-
-describe('IIPHeaderParser', () => {
-  it('at once', () => {
-    const hp = new HeaderParser();
-    for (const example of CASES) {
-      hp.reset();
-      const inp = fromBs(example[0]);
-      const res = hp.parse(inp, 0, inp.length);
-      assert.strictEqual(res, inp.length);
-      assert.strictEqual(hp.state, HeaderState.END);
-      assert.deepEqual(hp.fields, example[1]);
-    }
-  });
-  it('bytewise', () => {
-    const hp = new HeaderParser();
-    for (const example of CASES) {
-      hp.reset();
-      const inp = fromBs(example[0]);
-      let pos = 0;
-      let res = -2;
-      while (res === -2 && pos < inp.length) {
-        res = hp.parse(new Uint32Array([inp[pos++]]), 0, 1);
-      }
-      assert.strictEqual(res, 1);
-      assert.strictEqual(hp.state, HeaderState.END);
-      assert.deepEqual(hp.fields, example[1]);
-    }
-  });
-  it('no File= starter', () => {
-    const hp = new HeaderParser();
-    let inp = fromBs('size=123456;name=dGVzdA==:');
-    let res = hp.parse(inp, 0, inp.length);
-    assert.strictEqual(res, -1);
-    hp.reset();
-    inp = fromBs(CASES[0][0]);
-    res = hp.parse(inp, 0, inp.length);
-    assert.strictEqual(res, inp.length);
-    assert.strictEqual(hp.state, HeaderState.END);
-    assert.deepEqual(hp.fields, CASES[0][1]);
-  });
-  it('empty key - error', () => {
-    const hp = new HeaderParser();
-    let inp = fromBs('File=size=123456;=dGVzdA==:');
-    let res = hp.parse(inp, 0, inp.length);
-    assert.strictEqual(res, -1);
-    hp.reset();
-    inp = fromBs(CASES[0][0]);
-    res = hp.parse(inp, 0, inp.length);
-    assert.strictEqual(res, inp.length);
-    assert.strictEqual(hp.state, HeaderState.END);
-    assert.deepEqual(hp.fields, CASES[0][1]);
-  });
-  it('empty size value - set to 0', () => {
-    const hp = new HeaderParser();
-    let inp = fromBs('File=size=;name=dGVzdA==:');
-    let res = hp.parse(inp, 0, inp.length);
-    assert.strictEqual(res, inp.length);
-    assert.strictEqual(hp.state, HeaderState.END);
-    assert.deepEqual(hp.fields, {name: 'test', size: 0});
-    hp.reset();
-    inp = fromBs(CASES[0][0]);
-    res = hp.parse(inp, 0, inp.length);
-    assert.strictEqual(res, inp.length);
-    assert.strictEqual(hp.state, HeaderState.END);
-    assert.deepEqual(hp.fields, CASES[0][1]);
-  });
-  it('empty name value - set to empty string', () => {
-    const hp = new HeaderParser();
-    let inp = fromBs('File=size=123456;name=:');
-    let res = hp.parse(inp, 0, inp.length);
-    assert.strictEqual(res, inp.length);
-    assert.strictEqual(hp.state, HeaderState.END);
-    assert.deepEqual(hp.fields, {name: '', size: 123456});
-    hp.reset();
-    inp = fromBs(CASES[0][0]);
-    res = hp.parse(inp, 0, inp.length);
-    assert.strictEqual(res, inp.length);
-    assert.strictEqual(hp.state, HeaderState.END);
-    assert.deepEqual(hp.fields, CASES[0][1]);
-  });
-  it('empty size value - error', () => {
-    const hp = new HeaderParser();
-    let inp = fromBs('File=inline=1;width=;height=20%;preserveAspectRatio=1;size=123456;name=w7xtbMOkdXTDnw:');
-    let res = hp.parse(inp, 0, inp.length);
-    assert.strictEqual(res, -1);
-    hp.reset();
-    inp = fromBs(CASES[0][0]);
-    res = hp.parse(inp, 0, inp.length);
-    assert.strictEqual(res, inp.length);
-    assert.strictEqual(hp.state, HeaderState.END);
-    assert.deepEqual(hp.fields, CASES[0][1]);
-  });
-});

addons/addon-image/src/IIPHeaderParser.ts

@@ -1,187 +0,0 @@
-/**
- * Copyright (c) 2023 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-// eslint-disable-next-line
-declare const Buffer: any;
-
-
-export interface IHeaderFields {
-  [key: string]: number | string | Uint32Array | null | undefined;
-  // base-64 encoded filename. Defaults to "Unnamed file".
-  name: string;
-  // File size in bytes. The file transfer will be canceled if this size is exceeded.
-  size: number;
-  /**
-   * Optional width and height to render:
-   * - N: N character cells.
-   * - Npx: N pixels.
-   * - N%: N percent of the session's width or height.
-   * - auto: The image's inherent size will be used to determine an appropriate dimension.
-   */
-  width?: string;
-  height?: string;
-  // Optional, defaults to 1 respecting aspect ratio (width takes precedence).
-  preserveAspectRatio?: number;
-  // Optional, defaults to 0. If set to 1, the file will be displayed inline, else downloaded
-  // (download not supported).
-  inline?: number;
-}
-
-export const enum HeaderState {
-  START = 0,
-  ABORT = 1,
-  KEY = 2,
-  VALUE = 3,
-  END = 4
-}
-
-// field value decoders
-
-// ASCII bytes to string
-function toStr(data: Uint32Array): string {
-  let s = '';
-  for (let i = 0; i < data.length; ++i) {
-    s += String.fromCharCode(data[i]);
-  }
-  return s;
-}
-
-// digits to integer
-function toInt(data: Uint32Array): number {
-  let v = 0;
-  for (let i = 0; i < data.length; ++i) {
-    if (data[i] < 48 || data[i] > 57) {
-      throw new Error('illegal char');
-    }
-    v = v * 10 + data[i] - 48;
-  }
-  return v;
-}
-
-// check for correct size entry
-function toSize(data: Uint32Array): string {
-  const v = toStr(data);
-  if (!v.match(/^((auto)|(\d+?((px)|(%)){0,1}))$/)) {
-    throw new Error('illegal size');
-  }
-  return v;
-}
-
-// name is base64 encoded utf-8
-function toName(data: Uint32Array): string {
-  if (typeof Buffer !== 'undefined') {
-    return Buffer.from(toStr(data), 'base64').toString();
-  }
-  const bs = atob(toStr(data));
-  const b = new Uint8Array(bs.length);
-  for (let i = 0; i < b.length; ++i) {
-    b[i] = bs.charCodeAt(i);
-  }
-  return new TextDecoder().decode(b);
-}
-
-const DECODERS: {[key: string]: (v: Uint32Array) => number | string} = {
-  inline: toInt,
-  size: toInt,
-  name: toName,
-  width: toSize,
-  height: toSize,
-  preserveAspectRatio: toInt
-};
-
-
-const FILE_MARKER = [70, 105, 108, 101];
-const MAX_FIELDCHARS = 1024;
-
-
-export class HeaderParser {
-  public state: HeaderState = HeaderState.START;
-  private _buffer = new Uint32Array(MAX_FIELDCHARS);
-  private _position = 0;
-  private _key = '';
-  public fields: {[key: string]: number | string | Uint32Array | null | undefined} = {};
-
-  public reset(): void {
-    this._buffer.fill(0);
-    this.state = HeaderState.START;
-    this._position = 0;
-    this.fields = {};
-    this._key = '';
-  }
-
-  public parse(data: Uint32Array, start: number, end: number): number {
-    let state = this.state;
-    let pos = this._position;
-    const buffer = this._buffer;
-    if (state === HeaderState.ABORT || state === HeaderState.END) return -1;
-    if (state === HeaderState.START && pos > 6) return -1;
-    for (let i = start; i < end; ++i) {
-      const c = data[i];
-      switch (c) {
-        case 59: // ;
-          if (!this._storeValue(pos)) return this._a();
-          state = HeaderState.KEY;
-          pos = 0;
-          break;
-        case 61: // =
-          if (state === HeaderState.START) {
-            for (let k = 0; k < FILE_MARKER.length; ++k) {
-              if (buffer[k] !== FILE_MARKER[k]) return this._a();
-            }
-            state = HeaderState.KEY;
-            pos = 0;
-          } else if (state === HeaderState.KEY) {
-            if (!this._storeKey(pos)) return this._a();
-            state = HeaderState.VALUE;
-            pos = 0;
-          } else if (state === HeaderState.VALUE) {
-            if (pos >= MAX_FIELDCHARS) return this._a();
-            buffer[pos++] = c;
-          }
-          break;
-        case 58: // :
-          if (state === HeaderState.VALUE) {
-            if (!this._storeValue(pos)) return this._a();
-          }
-          this.state = HeaderState.END;
-          return i + 1;
-        default:
-          if (pos >= MAX_FIELDCHARS) return this._a();
-          buffer[pos++] = c;
-      }
-    }
-    this.state = state;
-    this._position = pos;
-    return -2;
-  }
-
-  private _a(): number {
-    this.state = HeaderState.ABORT;
-    return -1;
-  }
-
-  private _storeKey(pos: number): boolean {
-    const k = toStr(this._buffer.subarray(0, pos));
-    if (k) {
-      this._key = k;
-      this.fields[k] = null;
-      return true;
-    }
-    return false;
-  }
-
-  private _storeValue(pos: number): boolean {
-    if (this._key) {
-      try {
-        const v = this._buffer.slice(0, pos);
-        this.fields[this._key] = DECODERS[this._key] ? DECODERS[this._key](v) : v;
-      } catch {
-        return false;
-      }
-      return true;
-    }
-    return false;
-  }
-}

addons/addon-image/src/IIPImageStorage.ts

@@ -1,26 +0,0 @@
-/**
- * Copyright (c) 2023 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-import { ImageStorage } from './ImageStorage';
-
-/**
- * IIP (iTerm Image Protocol) specific image storage controller.
- *
- * Wraps the shared ImageStorage with IIP protocol semantics:
- * - Always uses scrolling mode (cursor advances with image)
- */
-export class IIPImageStorage {
-  constructor(
-    private readonly _storage: ImageStorage
-  ) {}
-
-  /**
-   * Add an IIP image to storage.
-   * Always uses scrolling mode — cursor advances past the image.
-   */
-  public addImage(img: HTMLCanvasElement | ImageBitmap): void {
-    this._storage.addImage(img, true);
-  }
-}

addons/addon-image/src/IIPMetrics.test.ts

@@ -1,44 +0,0 @@
-/**
- * Copyright (c) 2023 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-import { assert } from 'chai';
-import { imageType, IMetrics } from './IIPMetrics';
-
-// fix missing nodejs decl
-declare const require: (s: string) => any;
-const fs = require('fs');
-
-
-const TEST_IMAGES: [string, IMetrics][] = [
-  ['w3c_home_256.gif', { mime: 'image/gif', width: 72, height: 48 }],
-  ['w3c_home_256.jpg', { mime: 'image/jpeg', width: 72, height: 48 }],
-  ['w3c_home_256.png', { mime: 'image/png', width: 72, height: 48 }],
-  ['w3c_home_2.gif', { mime: 'image/gif', width: 72, height: 48 }],
-  ['w3c_home_2.jpg', { mime: 'image/jpeg', width: 72, height: 48 }],
-  ['w3c_home_2.png', { mime: 'image/png', width: 72, height: 48 }],
-  ['w3c_home_animation.gif', { mime: 'image/gif', width: 72, height: 48 }],
-  ['w3c_home.gif', { mime: 'image/gif', width: 72, height: 48 }],
-  ['w3c_home_gray.gif', { mime: 'image/gif', width: 72, height: 48 }],
-  ['w3c_home_gray.jpg', { mime: 'image/jpeg', width: 72, height: 48 }],
-  ['w3c_home_gray.png', { mime: 'image/png', width: 72, height: 48 }],
-  ['w3c_home.jpg', { mime: 'image/jpeg', width: 72, height: 48 }],
-  ['w3c_home.png', { mime: 'image/png', width: 72, height: 48 }],
-  ['w3c_home_noexif.jpg', { mime: 'image/jpeg', width: 72, height: 48 }],
-  ['spinfox.png', { mime: 'image/png', width: 148, height: 148 }],
-  ['iphone_hdr_YES.jpg', { mime: 'image/jpeg', width: 3264, height: 2448 }],
-  ['nikon-e950.jpg', { mime: 'image/jpeg', width: 800, height: 600 }],
-  ['agfa-makernotes.jpg', { mime: 'image/jpeg', width: 8, height: 8 }],
-  ['sony-alpha-6000.jpg', { mime: 'image/jpeg', width: 6000, height: 4000 }]
-];
-
-
-describe('IIPMetrics', () => {
-  it('bunch of testimages', () => {
-    for (let i = 0; i < TEST_IMAGES.length; ++i) {
-      const imageData = fs.readFileSync('./addons/addon-image/fixture/testimages/' + TEST_IMAGES[i][0]);
-      assert.deepStrictEqual(imageType(imageData), TEST_IMAGES[i][1]);
-    }
-  });
-});

addons/addon-image/src/IIPMetrics.ts

@@ -1,84 +0,0 @@
-/**
- * Copyright (c) 2023 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-
-export type ImageType = 'image/png' | 'image/jpeg' | 'image/gif' | 'image/qoi' | 'unsupported' | '';
-
-export interface IMetrics {
-  mime: ImageType;
-  width: number;
-  height: number;
-}
-
-export const UNSUPPORTED_TYPE: IMetrics = {
-  mime: 'unsupported',
-  width: 0,
-  height: 0
-};
-
-export function imageType(d: Uint8Array): IMetrics {
-  if (d.length < 24) {
-    return UNSUPPORTED_TYPE;
-  }
-  const d32 = new Uint32Array(d.buffer, d.byteOffset, 6);
-  // PNG: 89 50 4E 47 0D 0A 1A 0A (8 first bytes == magic number for PNG)
-  // + first chunk must be IHDR
-  if (d32[0] === 0x474E5089 && d32[1] === 0x0A1A0A0D && d32[3] === 0x52444849) {
-    return {
-      mime: 'image/png',
-      width: d[16] << 24 | d[17] << 16 | d[18] << 8 | d[19],
-      height: d[20] << 24 | d[21] << 16 | d[22] << 8 | d[23]
-    };
-  }
-  // JPEG: FF D8 FF
-  if (d[0] === 0xFF && d[1] === 0xD8 && d[2] === 0xFF) {
-    const [width, height] = jpgSize(d);
-    return { mime: 'image/jpeg', width, height };
-  }
-  // GIF: GIF87a or GIF89a
-  if (d32[0] === 0x38464947 && (d[4] === 0x37 || d[4] === 0x39) && d[5] === 0x61) {
-    return {
-      mime: 'image/gif',
-      width: d[7] << 8 | d[6],
-      height: d[9] << 8 | d[8]
-    };
-  }
-  // QOI: qoif
-  if (d32[0] === 0x66696F71) {
-    return {
-      mime: 'image/qoi',
-      width: d[4] << 24 | d[5] << 16 | d[6] << 8 | d[7],
-      height: d[8] << 24 | d[9] << 16 | d[10] << 8 | d[11]
-    };
-  }
-  return UNSUPPORTED_TYPE;
-}
-
-function jpgSize(d: Uint8Array): [number, number] {
-  const len = d.length;
-  let i = 4;
-  let blockLength = d[i] << 8 | d[i + 1];
-  while (true) {
-    i += blockLength;
-    if (i >= len) {
-      // exhausted without size info
-      return [0, 0];
-    }
-    if (d[i] !== 0xFF) {
-      return [0, 0];
-    }
-    if (d[i + 1] === 0xC0 || d[i + 1] === 0xC2) {
-      if (i + 8 < len) {
-        return [
-          d[i + 7] << 8 | d[i + 8],
-          d[i + 5] << 8 | d[i + 6]
-        ];
-      }
-      return [0, 0];
-    }
-    i += 2;
-    blockLength = d[i] << 8 | d[i + 1];
-  }
-}

addons/addon-image/src/ImageAddon.ts

@@ -1,383 +0,0 @@
-/**
- * Copyright (c) 2020 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-import type { ITerminalAddon, IDisposable } from '@xterm/xterm';
-import type { ImageAddon as IImageApi } from '@xterm/addon-image';
-import { Emitter, type IEvent } from '../../../src/common/Event';
-import { IIPHandler } from './IIPHandler';
-import { ImageRenderer } from './ImageRenderer';
-import { ImageStorage, CELL_SIZE_DEFAULT } from './ImageStorage';
-import { KittyGraphicsHandler } from './kitty/KittyGraphicsHandler';
-import { KittyImageStorage } from './kitty/KittyImageStorage';
-import { SixelHandler } from './SixelHandler';
-import { SixelImageStorage } from './SixelImageStorage';
-import { IIPImageStorage } from './IIPImageStorage';
-import { ITerminalExt, IImageAddonOptions, IResetHandler } from './Types';
-
-
-/**
- * Document VT features provided by this addon.
- *
- * @vt: #E[Supported via @xterm/addon-image.] DCS SIXEL "SIXEL Graphics"  "DCS Ps ; Ps ; Ps ; q Pt ST"  "Draw SIXEL image."
- *
- * Sixel support is provided by the addon @xterm/addon-image with these limitations:
- * - immediate coloring (no shared palette, allows high color settings of `img2sixel`)
- * - max. palette size of 4096 colors
- * - max. pixel width of 16K
- * - max. 25 MB per sixel sequence
- * - VT340 cursor positioning (begin of last sixel data row)
- *
- * See [addon readme](https://github.com/xtermjs/xterm.js/tree/master/addons/addon-image) for more details.
- *
- *
- * @vt: #E[Supported via @xterm/addon-image.] OSC 1337  "iTerm2 Commands"   "OSC 1337 ; Pt BEL"  "Custom iTerm2 commands."
- *
- * Only the inline image protocol (IIP) is supported by the addon @xterm/addon-image with
- * the following limitations:
- * - sequence:
- *   - format: `OSC 1337 ; File=inline=1 ; size=<unencoded size> ; ... : <base64 payload> BEL`
- *   - size param must be set and payload may not exceed CEIL(size * 4 / 3)
- *   - strict base64 handling as of RFC4648 §4 (standard alphabet, optional padding,
- *     no separator bytes allowed)
- *   - supported params: size, name, width, height, preserveAspectRatio
- * - image formats: PNG, JPEG and GIF
- * - no animation support (renders first image of a GIF)
- * - no multipart support
- * - VT340 cursor positioning (begin of last sixel data row)
- *
- * See [addon readme](https://github.com/xtermjs/xterm.js/tree/master/addons/addon-image)
- * and [iTerm2 IIP docs](https://iterm2.com/documentation-images.html) for more details.
- *
- *
- * @vt: #E[Supported via @xterm/addon-image.] APC KITTY_GRAPHICS "Kitty Graphics"  "APC G Pt ST"  "Kitty Graphics Protocol."
- *
- * Kitty graphics support is provided by the addon @xterm/addon-image.
- * Note that while basic image output already works, this is still work in progress.
- */
-
-// default values of addon ctor options
-const DEFAULT_OPTIONS: IImageAddonOptions = {
-  enableSizeReports: true,
-  pixelLimit: 16777216, // limit to 4096 * 4096 pixels
-  sixelSupport: true,
-  sixelScrolling: true,
-  sixelPaletteLimit: 4096,
-  sixelSizeLimit: 33554432,
-  storageLimit: 128,
-  showPlaceholder: true,
-  iipSupport: true,
-  iipSizeLimit: 33554432,
-  kittySupport: true,
-  kittySizeLimit: 33554432
-};
-
-// max palette size supported by the sixel lib (compile time setting)
-const MAX_SIXEL_PALETTE_SIZE = 4096;
-
-// definitions for _xtermGraphicsAttributes sequence
-const enum GaItem {
-  COLORS = 1,
-  SIXEL_GEO = 2,
-  REGIS_GEO = 3
-}
-const enum GaAction {
-  READ = 1,
-  SET_DEFAULT = 2,
-  SET = 3,
-  READ_MAX = 4
-}
-const enum GaStatus {
-  SUCCESS = 0,
-  ITEM_ERROR = 1,
-  ACTION_ERROR = 2,
-  FAILURE = 3
-}
-
-
-export class ImageAddon implements ITerminalAddon, IImageApi {
-  private _opts: IImageAddonOptions;
-  private _defaultOpts: IImageAddonOptions;
-  private _storage: ImageStorage | undefined;
-  private _renderer: ImageRenderer | undefined;
-  private _disposables: IDisposable[] = [];
-  private _terminal: ITerminalExt | undefined;
-  private _handlers: Map<String, IResetHandler> = new Map();
-  private readonly _onImageAdded = new Emitter<void>();
-  public readonly onImageAdded: IEvent<void> = this._onImageAdded.event;
-
-  constructor(opts?: Partial<IImageAddonOptions>) {
-    this._opts = Object.assign({}, DEFAULT_OPTIONS, opts);
-    this._defaultOpts = Object.assign({}, DEFAULT_OPTIONS, opts);
-  }
-
-  public dispose(): void {
-    for (const obj of this._disposables) {
-      obj.dispose();
-    }
-    this._disposables.length = 0;
-    this._handlers.clear();
-    this._onImageAdded.dispose();
-  }
-
-  private _disposeLater(...args: IDisposable[]): void {
-    for (const obj of args) {
-      this._disposables.push(obj);
-    }
-  }
-
-  public activate(terminal: ITerminalExt): void {
-    this._terminal = terminal;
-
-    // internal data structures
-    this._renderer = new ImageRenderer(terminal);
-    this._storage = new ImageStorage(terminal, this._renderer, this._opts);
-    this._storage.onImageAdded = () => this._onImageAdded.fire();
-
-    // enable size reports
-    if (this._opts.enableSizeReports) {
-      // const windowOptions = terminal.getOption('windowOptions');
-      // windowOptions.getWinSizePixels = true;
-      // windowOptions.getCellSizePixels = true;
-      // windowOptions.getWinSizeChars = true;
-      // terminal.setOption('windowOptions', windowOptions);
-      const windowOps = terminal.options.windowOptions ?? {};
-      windowOps.getWinSizePixels = true;
-      windowOps.getCellSizePixels = true;
-      windowOps.getWinSizeChars = true;
-      terminal.options.windowOptions = windowOps;
-    }
-
-    this._disposeLater(
-      this._renderer,
-      this._storage,
-
-      // DECSET/DECRST/DA1/XTSMGRAPHICS handlers
-      terminal.parser.registerCsiHandler({ prefix: '?', final: 'h' }, params => this._decset(params)),
-      terminal.parser.registerCsiHandler({ prefix: '?', final: 'l' }, params => this._decrst(params)),
-      terminal.parser.registerCsiHandler({ final: 'c' }, params => this._da1(params)),
-      terminal.parser.registerCsiHandler({ prefix: '?', final: 'S' }, params => this._xtermGraphicsAttributes(params)),
-
-      // render hook
-      terminal.onRender(range => this._storage?.render(range)),
-
-      /**
-       * reset handlers covered:
-       * - DECSTR
-       * - RIS
-       * - Terminal.reset()
-       */
-      terminal.parser.registerCsiHandler({ intermediates: '!', final: 'p' }, () => this.reset()),
-      terminal.parser.registerEscHandler({ final: 'c' }, () => this.reset()),
-      terminal._core._inputHandler.onRequestReset(() => this.reset()),
-
-      // wipe canvas and delete alternate images on buffer switch
-      terminal.buffer.onBufferChange(() => this._storage?.wipeAlternate()),
-
-      // extend images to the right on resize
-      terminal.onResize(metrics => this._storage?.viewportResize(metrics))
-    );
-
-    // SIXEL handler
-    if (this._opts.sixelSupport) {
-      const sixelStorage = new SixelImageStorage(this._storage!, this._opts, this._renderer!, terminal);
-      const sixelHandler = new SixelHandler(this._opts, sixelStorage, terminal);
-      this._handlers.set('sixel', sixelHandler);
-      this._disposeLater(
-        terminal._core._inputHandler._parser.registerDcsHandler({ final: 'q' }, sixelHandler)
-      );
-    }
-
-    // iTerm IIP handler
-    if (this._opts.iipSupport) {
-      const iipStorage = new IIPImageStorage(this._storage!);
-      const iipHandler = new IIPHandler(this._opts, this._renderer!, iipStorage, terminal);
-      this._handlers.set('iip', iipHandler);
-      this._disposeLater(
-        terminal._core._inputHandler._parser.registerOscHandler(1337, iipHandler)
-      );
-    }
-
-    // Kitty graphics handler
-    if (this._opts.kittySupport) {
-      const kittyStorage = new KittyImageStorage(this._storage!);
-      const kittyHandler = new KittyGraphicsHandler(this._opts, this._renderer!, kittyStorage, terminal);
-      this._handlers.set('kitty', kittyHandler);
-      this._disposeLater(
-        kittyStorage,
-        kittyHandler,
-        terminal._core._inputHandler._parser.registerApcHandler({ final: 'G' }, kittyHandler)
-      );
-    }
-  }
-
-  // Note: storageLimit is skipped here to not intoduce a surprising side effect.
-  public reset(): boolean {
-    // reset options customizable by sequences to defaults
-    this._opts.sixelScrolling = this._defaultOpts.sixelScrolling;
-    this._opts.sixelPaletteLimit = this._defaultOpts.sixelPaletteLimit;
-    // also clear image storage
-    this._storage?.reset();
-    // reset protocol handlers
-    for (const handler of this._handlers.values()) {
-      handler.reset();
-    }
-    return false;
-  }
-
-  public get storageLimit(): number {
-    return this._storage?.getLimit() || -1;
-  }
-
-  public set storageLimit(limit: number) {
-    this._storage?.setLimit(limit);
-    this._opts.storageLimit = limit;
-  }
-
-  public get storageUsage(): number {
-    if (this._storage) {
-      return this._storage.getUsage();
-    }
-    return -1;
-  }
-
-  public get showPlaceholder(): boolean {
-    return this._opts.showPlaceholder;
-  }
-
-  public set showPlaceholder(value: boolean) {
-    this._opts.showPlaceholder = value;
-    this._renderer?.showPlaceholder(value);
-  }
-
-  public getImageAtBufferCell(x: number, y: number): HTMLCanvasElement | undefined {
-    return this._storage?.getImageAtBufferCell(x, y);
-  }
-
-  public extractTileAtBufferCell(x: number, y: number): HTMLCanvasElement | undefined {
-    return this._storage?.extractTileAtBufferCell(x, y);
-  }
-
-  private _report(s: string): void {
-    this._terminal?._core.coreService.triggerDataEvent(s);
-  }
-
-  private _decset(params: (number | number[])[]): boolean {
-    for (let i = 0; i < params.length; ++i) {
-      switch (params[i]) {
-        case 80:
-          this._opts.sixelScrolling = false;
-          break;
-      }
-    }
-    return false;
-  }
-
-  private _decrst(params: (number | number[])[]): boolean {
-    for (let i = 0; i < params.length; ++i) {
-      switch (params[i]) {
-        case 80:
-          this._opts.sixelScrolling = true;
-          break;
-      }
-    }
-    return false;
-  }
-
-  // overload DA to return something more appropriate
-  private _da1(params: (number | number[])[]): boolean {
-    if (params[0]) {
-      return true;
-    }
-    // reported features:
-    // 62 - VT220
-    // 4 - SIXEL support
-    // 9 - charsets
-    // 22 - ANSI colors
-    if (this._opts.sixelSupport) {
-      this._report(`\x1b[?62;4;9;22c`);
-      return true;
-    }
-    return false;
-  }
-
-  /**
-   * Implementation of xterm's graphics attribute sequence.
-   *
-   * Supported features:
-   * - read/change palette limits (max 4096 by sixel lib)
-   * - read SIXEL canvas geometry (reports current window canvas or
-   *   squared pixelLimit if canvas > pixel limit)
-   *
-   * Everything else is deactivated.
-   */
-  private _xtermGraphicsAttributes(params: (number | number[])[]): boolean {
-    if (params.length < 2) {
-      return true;
-    }
-    if (params[0] === GaItem.COLORS) {
-      switch (params[1]) {
-        case GaAction.READ:
-          this._report(`\x1b[?${params[0]};${GaStatus.SUCCESS};${this._opts.sixelPaletteLimit}S`);
-          return true;
-        case GaAction.SET_DEFAULT:
-          this._opts.sixelPaletteLimit = this._defaultOpts.sixelPaletteLimit;
-          this._report(`\x1b[?${params[0]};${GaStatus.SUCCESS};${this._opts.sixelPaletteLimit}S`);
-          // also reset protocol handlers for now
-          for (const handler of this._handlers.values()) {
-            handler.reset();
-          }
-          return true;
-        case GaAction.SET:
-          if (params.length > 2 && !(params[2] instanceof Array) && params[2] <= MAX_SIXEL_PALETTE_SIZE) {
-            this._opts.sixelPaletteLimit = params[2];
-            this._report(`\x1b[?${params[0]};${GaStatus.SUCCESS};${this._opts.sixelPaletteLimit}S`);
-          } else {
-            this._report(`\x1b[?${params[0]};${GaStatus.ACTION_ERROR}S`);
-          }
-          return true;
-        case GaAction.READ_MAX:
-          this._report(`\x1b[?${params[0]};${GaStatus.SUCCESS};${MAX_SIXEL_PALETTE_SIZE}S`);
-          return true;
-        default:
-          this._report(`\x1b[?${params[0]};${GaStatus.ACTION_ERROR}S`);
-          return true;
-      }
-    }
-    if (params[0] === GaItem.SIXEL_GEO) {
-      switch (params[1]) {
-        // we only implement read and read_max here
-        case GaAction.READ:
-          let width = this._renderer?.dimensions?.css.canvas.width;
-          let height = this._renderer?.dimensions?.css.canvas.height;
-          if (!width || !height) {
-            // for some reason we have no working image renderer
-            // --> fallback to default cell size
-            const cellSize = CELL_SIZE_DEFAULT;
-            width = (this._terminal?.cols || 80) * cellSize.width;
-            height = (this._terminal?.rows || 24) * cellSize.height;
-          }
-          if (width * height < this._opts.pixelLimit) {
-            this._report(`\x1b[?${params[0]};${GaStatus.SUCCESS};${width.toFixed(0)};${height.toFixed(0)}S`);
-          } else {
-            // if we overflow pixelLimit report that squared instead
-            const x = Math.floor(Math.sqrt(this._opts.pixelLimit));
-            this._report(`\x1b[?${params[0]};${GaStatus.SUCCESS};${x};${x}S`);
-          }
-          return true;
-        case GaAction.READ_MAX:
-          // read_max returns pixelLimit as square area
-          const x = Math.floor(Math.sqrt(this._opts.pixelLimit));
-          this._report(`\x1b[?${params[0]};${GaStatus.SUCCESS};${x};${x}S`);
-          return true;
-        default:
-          this._report(`\x1b[?${params[0]};${GaStatus.ACTION_ERROR}S`);
-          return true;
-      }
-    }
-    // exit with error on ReGIS or any other requests
-    this._report(`\x1b[?${params[0]};${GaStatus.ITEM_ERROR}S`);
-    return true;
-  }
-}

addons/addon-image/src/ImageRenderer.ts

@@ -1,424 +0,0 @@
-/**
- * Copyright (c) 2020 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-import { toRGBA8888 } from 'sixel/lib/Colors';
-import { IDisposable } from '@xterm/xterm';
-import { ICellSize, ImageLayer, ITerminalExt, IImageSpec, IRenderDimensions, IRenderService } from './Types';
-import { Disposable, MutableDisposable, toDisposable } from '../../../src/common/Lifecycle';
-
-const enum Constants {
-  PLACEHOLDER_LENGTH = 4096,
-  PLACEHOLDER_HEIGHT = 24
-}
-
-/**
- * ImageRenderer - terminal frontend extension:
- * - provide primitives for canvas, ImageData, Bitmap (static)
- * - add canvas layer to DOM (browser only for now)
- * - draw image tiles onRender
- */
-export class ImageRenderer extends Disposable implements IDisposable {
-  /** @deprecated Kept for backward compat — points to top layer canvas. */
-  public get canvas(): HTMLCanvasElement | undefined { return this._layers.get('top')?.canvas; }
-  private _layers = new Map<ImageLayer, CanvasRenderingContext2D>();
-  private _placeholder: HTMLCanvasElement | undefined;
-  private _placeholderBitmap: ImageBitmap | undefined;
-  private _optionsRefresh = this._register(new MutableDisposable());
-  private _oldOpen: ((parent: HTMLElement) => void) | undefined;
-  private _renderService: IRenderService | undefined;
-  private _oldSetRenderer: ((renderer: any) => void) | undefined;
-
-  // drawing primitive - canvas
-  public static createCanvas(localDocument: Document | undefined, width: number, height: number): HTMLCanvasElement {
-    /**
-     * NOTE: We normally dont care, from which document the canvas
-     * gets created, so we can fall back to global document,
-     * if the terminal has no document associated yet.
-     * This way early image loads before calling .open keep working
-     * (still discouraged though, as the metrics will be screwed up).
-     * Only the DOM output canvas should be on the terminal's document,
-     * which gets explicitly checked in `insertLayerToDom`.
-     */
-    const canvas = (localDocument ?? document).createElement('canvas');
-    canvas.width = width | 0;
-    canvas.height = height | 0;
-    return canvas;
-  }
-
-  // drawing primitive - ImageData with optional buffer
-  public static createImageData(ctx: CanvasRenderingContext2D, width: number, height: number, buffer?: ArrayBuffer): ImageData {
-    if (typeof ImageData !== 'function') {
-      const imgData = ctx.createImageData(width, height);
-      if (buffer) {
-        imgData.data.set(new Uint8ClampedArray(buffer, 0, width * height * 4));
-      }
-      return imgData;
-    }
-    return buffer
-      ? new ImageData(new Uint8ClampedArray(buffer, 0, width * height * 4), width, height)
-      : new ImageData(width, height);
-  }
-
-  // drawing primitive - ImageBitmap
-  public static createImageBitmap(img: ImageBitmapSource): Promise<ImageBitmap | undefined> {
-    if (typeof createImageBitmap !== 'function') {
-      return Promise.resolve(undefined);
-    }
-    return createImageBitmap(img);
-  }
-
-
-  constructor(private _terminal: ITerminalExt) {
-    super();
-    this._oldOpen = this._terminal._core.open;
-    this._terminal._core.open = (parent: HTMLElement): void => {
-      this._oldOpen?.call(this._terminal._core, parent);
-      this._open();
-    };
-    if (this._terminal._core.screenElement) {
-      this._open();
-    }
-    // hack to spot fontSize changes
-    this._optionsRefresh.value = this._terminal._core.optionsService.onOptionChange(option => {
-      if (option === 'fontSize') {
-        this.rescaleCanvas();
-        this._renderService?.refreshRows(0, this._terminal.rows);
-      }
-    });
-    this._register(toDisposable(() => {
-      this.removeLayerFromDom();
-      this.removeLayerFromDom('bottom');
-      if (this._terminal._core && this._oldOpen) {
-        this._terminal._core.open = this._oldOpen;
-        this._oldOpen = undefined;
-      }
-      if (this._renderService && this._oldSetRenderer) {
-        this._renderService.setRenderer = this._oldSetRenderer;
-        this._oldSetRenderer = undefined;
-      }
-      this._renderService = undefined;
-      this._layers.clear();
-      this._placeholderBitmap?.close();
-      this._placeholderBitmap = undefined;
-      this._placeholder = undefined;
-    }));
-  }
-
-  /**
-   * Enable the placeholder.
-   */
-  public showPlaceholder(value: boolean): void {
-    if (value) {
-      if (!this._placeholder && this.cellSize.height !== -1) {
-        this._createPlaceHolder(Math.max(this.cellSize.height + 1, Constants.PLACEHOLDER_HEIGHT));
-      }
-    } else {
-      this._placeholderBitmap?.close();
-      this._placeholderBitmap = undefined;
-      this._placeholder = undefined;
-    }
-    this._renderService?.refreshRows(0, this._terminal.rows);
-  }
-
-  /**
-   * Dimensions of the terminal.
-   * Forwarded from internal render service.
-   */
-  public get dimensions(): IRenderDimensions | undefined {
-    return this._terminal.dimensions;
-  }
-
-  /**
-   * Current cell size (float).
-   */
-  public get cellSize(): ICellSize {
-    return {
-      width: this.dimensions?.css.cell.width || -1,
-      height: this.dimensions?.css.cell.height || -1
-    };
-  }
-
-  /**
-   * Clear a region of the image layer canvas.
-   */
-  public clearLines(start: number, end: number, layer?: ImageLayer): void {
-    const y = start * (this.dimensions?.css.cell.height || 0);
-    const w = this.dimensions?.css.canvas.width || 0;
-    const h = (++end - start) * (this.dimensions?.css.cell.height || 0);
-    if (!layer || layer === 'top') {
-      this._layers.get('top')?.clearRect(0, y, w, h);
-    }
-    if (!layer || layer === 'bottom') {
-      this._layers.get('bottom')?.clearRect(0, y, w, h);
-    }
-  }
-
-  /**
-   * Clear whole image canvas.
-   */
-  public clearAll(layer?: ImageLayer): void {
-    if (!layer || layer === 'top') {
-      const ctx = this._layers.get('top');
-      ctx?.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height);
-    }
-    if (!layer || layer === 'bottom') {
-      const ctx = this._layers.get('bottom');
-      ctx?.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height);
-    }
-  }
-
-  /**
-   * Draw neighboring tiles on the image layer canvas.
-   */
-  public draw(imgSpec: IImageSpec, tileId: number, col: number, row: number, count: number = 1): void {
-    const ctx = this._layers.get(imgSpec.layer);
-    if (!ctx) {
-      return;
-    }
-    const { width, height } = this.cellSize;
-
-    // Don't try to draw anything, if we cannot get valid renderer metrics.
-    if (width === -1 || height === -1) {
-      return;
-    }
-
-    this._rescaleImage(imgSpec, width, height);
-    const img = imgSpec.actual!;
-    const cols = Math.ceil(img.width / width);
-
-    const sx = (tileId % cols) * width;
-    const sy = Math.floor(tileId / cols) * height;
-    const dx = col * width;
-    const dy = row * height;
-
-    // safari bug: never access image source out of bounds
-    const finalWidth = count * width + sx > img.width ? img.width - sx : count * width;
-    const finalHeight = sy + height > img.height ? img.height - sy : height;
-
-    // Floor all pixel offsets to get stable tile mapping without any overflows.
-    // Note: For not pixel perfect aligned cells like in the DOM renderer
-    // this will move a tile slightly to the top/left (subpixel range, thus ignore it).
-    // FIX #34: avoid striping on displays with pixelDeviceRatio != 1 by ceiling height and width
-    ctx.drawImage(
-      img,
-      Math.floor(sx), Math.floor(sy), Math.ceil(finalWidth), Math.ceil(finalHeight),
-      Math.floor(dx), Math.floor(dy), Math.ceil(finalWidth), Math.ceil(finalHeight)
-    );
-  }
-
-  /**
-   * Extract a single tile from an image.
-   */
-  public extractTile(imgSpec: IImageSpec, tileId: number): HTMLCanvasElement | undefined {
-    const { width, height } = this.cellSize;
-    // Don't try to draw anything, if we cannot get valid renderer metrics.
-    if (width === -1 || height === -1) {
-      return;
-    }
-    this._rescaleImage(imgSpec, width, height);
-    const img = imgSpec.actual!;
-    const cols = Math.ceil(img.width / width);
-    const sx = (tileId % cols) * width;
-    const sy = Math.floor(tileId / cols) * height;
-    const finalWidth = width + sx > img.width ? img.width - sx : width;
-    const finalHeight = sy + height > img.height ? img.height - sy : height;
-
-    const canvas = ImageRenderer.createCanvas(this.document, finalWidth, finalHeight);
-    const ctx = canvas.getContext('2d');
-    if (ctx) {
-      ctx.drawImage(
-        img,
-        Math.floor(sx), Math.floor(sy), Math.floor(finalWidth), Math.floor(finalHeight),
-        0, 0, Math.floor(finalWidth), Math.floor(finalHeight)
-      );
-      return canvas;
-    }
-  }
-
-  /**
-   * Draw a line with placeholder on the image layer canvas.
-   */
-  public drawPlaceholder(col: number, row: number, count: number = 1): void {
-    const ctx = this._layers.get('top');
-    if (ctx) {
-      const { width, height } = this.cellSize;
-
-      // Don't try to draw anything, if we cannot get valid renderer metrics.
-      if (width === -1 || height === -1) {
-        return;
-      }
-
-      if (!this._placeholder) {
-        this._createPlaceHolder(Math.max(height + 1, Constants.PLACEHOLDER_HEIGHT));
-      } else if (height >= this._placeholder!.height) {
-        this._createPlaceHolder(height + 1);
-      }
-      if (!this._placeholder) return;
-      ctx.drawImage(
-        this._placeholderBitmap ?? this._placeholder!,
-        col * width,
-        (row * height) % 2 ? 0 : 1,  // needs %2 offset correction
-        width * count,
-        height,
-        col * width,
-        row * height,
-        width * count,
-        height
-      );
-    }
-  }
-
-  /**
-   * Rescale image layer canvas if needed.
-   * Checked once from `ImageStorage.render`.
-   */
-  public rescaleCanvas(): void {
-    const w = this.dimensions?.css.canvas.width || 0;
-    const h = this.dimensions?.css.canvas.height || 0;
-    for (const ctx of this._layers.values()) {
-      if (ctx.canvas.width !== w || ctx.canvas.height !== h) {
-        ctx.canvas.width = w;
-        ctx.canvas.height = h;
-      }
-    }
-  }
-
-  /**
-   * Rescale image in storage if needed.
-   */
-  private _rescaleImage(spec: IImageSpec, currentWidth: number, currentHeight: number): void {
-    if (currentWidth === spec.actualCellSize.width && currentHeight === spec.actualCellSize.height) {
-      return;
-    }
-    const { width: originalWidth, height: originalHeight } = spec.origCellSize;
-    if (currentWidth === originalWidth && currentHeight === originalHeight) {
-      spec.actual = spec.orig;
-      spec.actualCellSize.width = originalWidth;
-      spec.actualCellSize.height = originalHeight;
-      return;
-    }
-    const canvas = ImageRenderer.createCanvas(
-      this.document,
-      Math.ceil(spec.orig!.width * currentWidth / originalWidth),
-      Math.ceil(spec.orig!.height * currentHeight / originalHeight)
-    );
-    const ctx = canvas.getContext('2d');
-    if (ctx) {
-      ctx.drawImage(spec.orig!, 0, 0, canvas.width, canvas.height);
-      spec.actual = canvas;
-      spec.actualCellSize.width = currentWidth;
-      spec.actualCellSize.height = currentHeight;
-    }
-  }
-
-  /**
-   * Lazy init for the renderer.
-   */
-  private _open(): void {
-    this._renderService = this._terminal._core._renderService;
-    this._oldSetRenderer = this._renderService.setRenderer.bind(this._renderService);
-    this._renderService.setRenderer = (renderer: any) => {
-      for (const key of [...this._layers.keys()]) {
-        this.removeLayerFromDom(key);
-      }
-      this._oldSetRenderer?.call(this._renderService, renderer);
-    };
-  }
-
-  public insertLayerToDom(layer: ImageLayer = 'top'): void {
-    // make sure that the terminal is attached to a document and to DOM
-    if (!this.document || !this._terminal._core.screenElement) {
-      console.warn('image addon: cannot insert output canvas to DOM, missing document or screenElement');
-      return;
-    }
-    if (this._layers.has(layer)) {
-      return;
-    }
-    const canvas = ImageRenderer.createCanvas(
-      this.document, this.dimensions?.css.canvas.width || 0,
-      this.dimensions?.css.canvas.height || 0
-    );
-    canvas.classList.add(`xterm-image-layer-${layer}`);
-    const screenElement = this._terminal._core.screenElement;
-    // Use isolation to create a stacking context without overriding z-index,
-    // which would conflict with integrators (e.g. VS Code) that set their
-    // own z-index on the screen element.
-    screenElement.style.isolation = 'isolate';
-    if (layer === 'bottom') {
-      // Use z-index:-1 so it paints behind non-positioned text elements.
-      // The screen element needs to be a stacking context (via isolation)
-      // to contain the negative z-index, otherwise it would go behind the
-      // entire terminal.
-      canvas.style.zIndex = '-1';
-      screenElement.insertBefore(canvas, screenElement.firstChild);
-    } else {
-      // Explicit z-index ensures the image canvas reliably stacks above
-      // the text layer (DOM renderer rows). z-index: 0 is below the
-      // selection overlay (z-index: 1).
-      canvas.style.zIndex = '0';
-      screenElement.appendChild(canvas);
-    }
-    const ctx = canvas.getContext('2d', { alpha: true });
-    if (!ctx) {
-      canvas.remove();
-      return;
-    }
-    this._layers.set(layer, ctx);
-    this.clearAll(layer);
-  }
-
-  public removeLayerFromDom(layer: ImageLayer = 'top'): void {
-    const ctx = this._layers.get(layer);
-    if (ctx) {
-      ctx.canvas.remove();
-      this._layers.delete(layer);
-    }
-  }
-
-  public hasLayer(layer: ImageLayer): boolean {
-    return this._layers.has(layer);
-  }
-
-  private _createPlaceHolder(height: number = Constants.PLACEHOLDER_HEIGHT): void {
-    this._placeholderBitmap?.close();
-    this._placeholderBitmap = undefined;
-
-    // create blueprint to fill placeholder with
-    const bWidth = 32;  // must be 2^n
-    const blueprint = ImageRenderer.createCanvas(this.document, bWidth, height);
-    const ctx = blueprint.getContext('2d', { alpha: false });
-    if (!ctx) return;
-    const imgData = ImageRenderer.createImageData(ctx, bWidth, height);
-    const d32 = new Uint32Array(imgData.data.buffer);
-    const black = toRGBA8888(0, 0, 0);
-    const white = toRGBA8888(255, 255, 255);
-    d32.fill(black);
-    for (let y = 0; y < height; ++y) {
-      const shift = y % 2;
-      const offset = y * bWidth;
-      for (let x = 0; x < bWidth; x += 2) {
-        d32[offset + x + shift] = white;
-      }
-    }
-    ctx.putImageData(imgData, 0, 0);
-
-    // create placeholder line, width aligned to blueprint width
-    const width = (screen.width + bWidth - 1) & ~(bWidth - 1) || Constants.PLACEHOLDER_LENGTH;
-    this._placeholder = ImageRenderer.createCanvas(this.document, width, height);
-    const ctx2 = this._placeholder.getContext('2d', { alpha: false });
-    if (!ctx2) {
-      this._placeholder = undefined;
-      return;
-    }
-    for (let i = 0; i < width; i += bWidth) {
-      ctx2.drawImage(blueprint, i, 0);
-    }
-    ImageRenderer.createImageBitmap(this._placeholder).then(bitmap => this._placeholderBitmap = bitmap);
-  }
-
-  public get document(): Document | undefined {
-    return this._terminal._core._coreBrowserService?.window.document;
-  }
-}

addons/addon-image/src/ImageStorage.ts

@@ -1,668 +0,0 @@
-/**
- * Copyright (c) 2020 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-import { IDisposable } from '@xterm/xterm';
-import { ImageRenderer } from './ImageRenderer';
-import { ITerminalExt, IExtendedAttrsImage, IImageAddonOptions, IImageSpec, IBufferLineExt, BgFlags, Cell, Content, ICellSize, ExtFlags, Attributes, UnderlineStyle, ImageLayer } from './Types';
-
-
-// fallback default cell size
-export const CELL_SIZE_DEFAULT: ICellSize = {
-  width: 7,
-  height: 14
-};
-
-/**
- * Extend extended attribute to also hold image tile information.
- *
- * Object definition is copied from base repo to fully mimick its behavior.
- * Image data is added as additional public properties `imageId` and `tileId`.
- */
-class ExtendedAttrsImage implements IExtendedAttrsImage {
-  private _ext: number = 0;
-  public get ext(): number {
-    if (this._urlId) {
-      return (
-        (this._ext & ~ExtFlags.UNDERLINE_STYLE) |
-        (this.underlineStyle << 26)
-      );
-    }
-    return this._ext;
-  }
-  public set ext(value: number) { this._ext = value; }
-
-  public get underlineStyle(): UnderlineStyle {
-    // Always return the URL style if it has one
-    if (this._urlId) {
-      return UnderlineStyle.DASHED;
-    }
-    return (this._ext & ExtFlags.UNDERLINE_STYLE) >> 26;
-  }
-  public set underlineStyle(value: UnderlineStyle) {
-    this._ext &= ~ExtFlags.UNDERLINE_STYLE;
-    this._ext |= (value << 26) & ExtFlags.UNDERLINE_STYLE;
-  }
-
-  public get underlineColor(): number {
-    return this._ext & (Attributes.CM_MASK | Attributes.RGB_MASK);
-  }
-  public set underlineColor(value: number) {
-    this._ext &= ~(Attributes.CM_MASK | Attributes.RGB_MASK);
-    this._ext |= value & (Attributes.CM_MASK | Attributes.RGB_MASK);
-  }
-
-  public get underlineVariantOffset(): number {
-    const val = (this._ext & ExtFlags.VARIANT_OFFSET) >> 29;
-    if (val < 0) {
-      return val ^ 0xFFFFFFF8;
-    }
-    return val;
-  }
-  public set underlineVariantOffset(value: number) {
-    this._ext &= ~ExtFlags.VARIANT_OFFSET;
-    this._ext |= (value << 29) & ExtFlags.VARIANT_OFFSET;
-  }
-
-  private _urlId: number = 0;
-  public get urlId(): number {
-    return this._urlId;
-  }
-  public set urlId(value: number) {
-    this._urlId = value;
-  }
-
-  constructor(
-    ext: number = 0,
-    urlId: number = 0,
-    public imageId = -1,
-    public tileId = -1
-  ) {
-    this._ext = ext;
-    this._urlId = urlId;
-  }
-
-  public clone(): IExtendedAttrsImage {
-    /**
-     * Technically we dont need a clone variant of ExtendedAttrsImage,
-     * as we never clone a cell holding image data.
-     * Note: Clone is only meant to be used by the InputHandler for
-     * sticky attributes, which is never the case for image data.
-     * We still provide a proper clone method to reflect the full ext attr
-     * state in case there are future use cases for clone.
-     */
-    return new ExtendedAttrsImage(this._ext, this._urlId, this.imageId, this.tileId);
-  }
-
-  public isEmpty(): boolean {
-    return this.underlineStyle === UnderlineStyle.NONE && this._urlId === 0 && this.imageId === -1;
-  }
-}
-const EMPTY_ATTRS = new ExtendedAttrsImage();
-
-
-/**
- * ImageStorage - extension of CoreTerminal:
- * - hold image data
- * - write/read image data to/from buffer
- *
- * TODO: image composition for overwrites
- */
-export class ImageStorage implements IDisposable {
-  // storage
-  private _images: Map<number, IImageSpec> = new Map();
-  // last used id
-  private _lastId = 0;
-  // last evicted id
-  private _lowestId = 0;
-  // whether a full clear happened before
-  private _fullyCleared = false;
-  // whether render should do a full clear
-  private _needsFullClear = false;
-  // hard limit of stored pixels (fallback limit of 10 MB)
-  private _pixelLimit: number = 2500000;
-
-  private _viewportMetrics: { cols: number, rows: number };
-  public onImageAdded: (() => void) | undefined;
-  public onImageDeleted: ((storageId: number) => void) | undefined;
-
-  constructor(
-    private _terminal: ITerminalExt,
-    private _renderer: ImageRenderer,
-    private _opts: IImageAddonOptions
-  ) {
-    try {
-      this.setLimit(this._opts.storageLimit);
-    } catch (e: unknown) {
-      if (e instanceof Error) {
-        console.error(e.message);
-      }
-      console.warn(`storageLimit is set to ${this.getLimit()} MB`);
-    }
-    this._viewportMetrics = {
-      cols: this._terminal.cols,
-      rows: this._terminal.rows
-    };
-  }
-
-  public dispose(): void {
-    this.reset();
-  }
-
-  public reset(): void {
-    for (const spec of this._images.values()) {
-      spec.marker?.dispose();
-    }
-    // NOTE: marker.dispose above already calls ImageBitmap.close
-    // therefore we can just wipe the map here
-    this._images.clear();
-    this._renderer.clearAll();
-  }
-
-  public getLimit(): number {
-    return this._pixelLimit * 4 / 1000000;
-  }
-
-  public setLimit(value: number): void {
-    if (value < 0.5 || value > 1000) {
-      throw RangeError('invalid storageLimit, should be at least 0.5 MB and not exceed 1G');
-    }
-    this._pixelLimit = (value / 4 * 1000000) >>> 0;
-    this._evictOldest(0);
-  }
-
-  public getUsage(): number {
-    return this._getStoredPixels() * 4 / 1000000;
-  }
-
-  private _getStoredPixels(): number {
-    let storedPixels = 0;
-    for (const spec of this._images.values()) {
-      if (spec.orig) {
-        storedPixels += spec.orig.width * spec.orig.height;
-        if (spec.actual && spec.actual !== spec.orig) {
-          storedPixels += spec.actual.width * spec.actual.height;
-        }
-      }
-    }
-    return storedPixels;
-  }
-
-  private _delImg(id: number): void {
-    const spec = this._images.get(id);
-    if (!spec) return;
-    this._images.delete(id);
-    // FIXME: really ugly workaround to get bitmaps deallocated :(
-    if (window.ImageBitmap && spec.orig instanceof ImageBitmap) {
-      spec.orig.close();
-    }
-    this.onImageDeleted?.(id);
-  }
-
-  /**
-   * Wipe canvas and images on alternate buffer.
-   */
-  public wipeAlternate(): void {
-    // remove all alternate tagged images
-    const zero = [];
-    for (const [id, spec] of this._images.entries()) {
-      if (spec.bufferType === 'alternate') {
-        spec.marker?.dispose();
-        zero.push(id);
-      }
-    }
-    for (const id of zero) {
-      this._delImg(id);
-    }
-    // mark canvas to be wiped on next render
-    this._needsFullClear = true;
-    this._fullyCleared = false;
-  }
-
-  /**
-   * Delete an image by its internal storage ID.
-   * Used by protocols that support explicit deletion (e.g. Kitty a=d).
-   */
-  public deleteImage(id: number): void {
-    const spec = this._images.get(id);
-    if (spec) {
-      spec.marker?.dispose();
-      this._delImg(id);
-    }
-  }
-
-  /**
-   * Method to add an image to the storage.
-   * @param img - The image to add (canvas or bitmap).
-   * @param scrolling - When true, cursor advances with the image (lineFeed per row).
-   *   When false, image is placed at (0,0) and cursor is restored (DECSET 80 / sixel origin mode).
-   * @param layer - Which canvas layer to render on ('top' or 'bottom').
-   * @param zIndex - Z-index for image layering within the same layer.
-   * @returns The internal image ID assigned to the stored image.
-   */
-  public addImage(img: HTMLCanvasElement | ImageBitmap, scrolling: boolean, layer: ImageLayer = 'top', zIndex: number = 0): number {
-    // never allow storage to exceed memory limit
-    this._evictOldest(img.width * img.height);
-
-    // calc rows x cols needed to display the image
-    let cellSize = this._renderer.cellSize;
-    if (cellSize.width === -1 || cellSize.height === -1) {
-      cellSize = CELL_SIZE_DEFAULT;
-    }
-    const cols = Math.ceil(img.width / cellSize.width);
-    const rows = Math.ceil(img.height / cellSize.height);
-
-    const imageId = ++this._lastId;
-
-    const buffer = this._terminal._core.buffer;
-    const termCols = this._terminal.cols;
-    const termRows = this._terminal.rows;
-    const originX = buffer.x;
-    const originY = buffer.y;
-    let offset = originX;
-    let tileCount = 0;
-
-    if (!scrolling) {
-      buffer.x = 0;
-      buffer.y = 0;
-      offset = 0;
-    }
-
-    this._terminal._core._inputHandler._dirtyRowTracker.markDirty(buffer.y);
-    for (let row = 0; row < rows; ++row) {
-      const line = buffer.lines.get(buffer.y + buffer.ybase);
-      for (let col = 0; col < cols; ++col) {
-        if (offset + col >= termCols) break;
-        this._writeToCell(line as IBufferLineExt, offset + col, imageId, row * cols + col);
-        tileCount++;
-      }
-      if (scrolling) {
-        if (row < rows - 1) this._terminal._core._inputHandler.lineFeed();
-      } else {
-        if (++buffer.y >= termRows) break;
-      }
-      buffer.x = offset;
-    }
-    this._terminal._core._inputHandler._dirtyRowTracker.markDirty(buffer.y);
-
-    // cursor positioning modes
-    if (scrolling) {
-      buffer.x = offset;
-    } else {
-      buffer.x = originX;
-      buffer.y = originY;
-    }
-
-    // deleted images with zero tile count
-    const zero = [];
-    for (const [id, spec] of this._images.entries()) {
-      if (spec.tileCount < 1) {
-        spec.marker?.dispose();
-        zero.push(id);
-      }
-    }
-    for (const id of zero) {
-      this._delImg(id);
-    }
-
-    // eviction marker:
-    // delete the image when the marker gets disposed
-    const endMarker = this._terminal.registerMarker(0);
-    endMarker?.onDispose(() => {
-      const spec = this._images.get(imageId);
-      if (spec) {
-        this._delImg(imageId);
-      }
-    });
-
-    // since markers do not work on alternate for some reason,
-    // we evict images here manually
-    if (this._terminal.buffer.active.type === 'alternate') {
-      this._evictOnAlternate();
-    }
-
-    // create storage entry
-    const imgSpec: IImageSpec = {
-      orig: img,
-      origCellSize: cellSize,
-      actual: img,
-      actualCellSize: { ...cellSize },  // clone needed, since later modified
-      marker: endMarker || undefined,
-      tileCount,
-      bufferType: this._terminal.buffer.active.type,
-      layer,
-      zIndex
-    };
-
-    // finally add the image
-    this._images.set(imageId, imgSpec);
-    this.onImageAdded?.();
-    return imageId;
-  }
-
-
-  /**
-   * Render method. Collects buffer information and triggers
-   * canvas updates.
-   */
-  // TODO: Should we move this to the ImageRenderer?
-  public render(range: { start: number, end: number }): void {
-    // Determine which layers have images
-    let hasTopImages = false;
-    let hasBottomImages = false;
-    for (const spec of this._images.values()) {
-      if (spec.layer === 'bottom') {
-        hasBottomImages = true;
-      } else {
-        hasTopImages = true;
-      }
-      if (hasTopImages && hasBottomImages) break;
-    }
-
-    // Lazily insert layers that are needed
-    if (hasTopImages && !this._renderer.hasLayer('top')) {
-      this._renderer.insertLayerToDom('top');
-      if (!this._renderer.hasLayer('top')) return;
-    }
-    if (hasBottomImages && !this._renderer.hasLayer('bottom')) {
-      this._renderer.insertLayerToDom('bottom');
-    }
-
-    // rescale if needed
-    this._renderer.rescaleCanvas();
-
-    // exit early if we dont have any images to test for
-    if (!this._images.size) {
-      if (!this._fullyCleared) {
-        this._renderer.clearAll();
-        this._fullyCleared = true;
-        this._needsFullClear = false;
-      }
-      if (this._renderer.hasLayer('top')) {
-        this._renderer.removeLayerFromDom('top');
-      }
-      if (this._renderer.hasLayer('bottom')) {
-        this._renderer.removeLayerFromDom('bottom');
-      }
-      return;
-    }
-
-    // Remove layers no longer needed
-    if (!hasTopImages && this._renderer.hasLayer('top')) {
-      this._renderer.clearAll('top');
-      this._renderer.removeLayerFromDom('top');
-    }
-    if (!hasBottomImages && this._renderer.hasLayer('bottom')) {
-      this._renderer.clearAll('bottom');
-      this._renderer.removeLayerFromDom('bottom');
-    }
-
-    // buffer switches force a full clear
-    if (this._needsFullClear) {
-      this._renderer.clearAll();
-      this._fullyCleared = true;
-      this._needsFullClear = false;
-    }
-
-    const { start, end } = range;
-    const buffer = this._terminal._core.buffer;
-    const cols = this._terminal._core.cols;
-
-    // clear drawing area
-    this._renderer.clearLines(start, end);
-
-    // Collect draw calls so we can sort by z-index (lower z drawn first).
-    const drawCalls: { imgSpec: IImageSpec, tileId: number, col: number, row: number, count: number }[] = [];
-    const placeholderCalls: { col: number, row: number, count: number }[] = [];
-
-    // walk all cells in viewport and collect tiles found
-    // Note: We check _extendedAttrs directly (not just HAS_EXTENDED flag)
-    // because text writes clear the BG flag but leave image tile data intact.
-    // This lets top-layer images survive text overwrites (kitty C=1 behavior).
-    for (let row = start; row <= end; ++row) {
-      const line = buffer.lines.get(row + buffer.ydisp) as IBufferLineExt;
-      if (!line) return;
-      for (let col = 0; col < cols; ++col) {
-        let e: IExtendedAttrsImage;
-        if (line.getBg(col) & BgFlags.HAS_EXTENDED) {
-          e = line._extendedAttrs[col] ?? EMPTY_ATTRS;
-        } else {
-          const maybeImg = line._extendedAttrs[col] as IExtendedAttrsImage | undefined;
-          if (!maybeImg || maybeImg.imageId === undefined || maybeImg.imageId === -1) {
-            continue;
-          }
-          e = maybeImg;
-        }
-        const imageId = e.imageId;
-        if (imageId === undefined || imageId === -1) {
-          continue;
-        }
-        const imgSpec = this._images.get(imageId);
-        if (e.tileId !== -1) {
-          const startTile = e.tileId;
-          const startCol = col;
-          let count = 1;
-          /**
-           * merge tiles to the right into a single draw call, if:
-           * - not at end of line
-           * - cell has same image id
-           * - cell has consecutive tile id
-           * Also check _extendedAttrs directly for cells where text cleared HAS_EXTENDED.
-           */
-          while (++col < cols) {
-            const nextE = line._extendedAttrs[col] as IExtendedAttrsImage | undefined;
-            if (!nextE || nextE.imageId !== imageId || nextE.tileId !== startTile + count) {
-              break;
-            }
-            e = nextE;
-            count++;
-          }
-          col--;
-          if (imgSpec) {
-            if (imgSpec.actual) {
-              drawCalls.push({ imgSpec, tileId: startTile, col: startCol, row, count });
-            }
-          } else if (this._opts.showPlaceholder) {
-            placeholderCalls.push({ col: startCol, row, count });
-          }
-          this._fullyCleared = false;
-        }
-      }
-    }
-
-    // Sort by z-index so lower z draws first (higher z renders on top)
-    drawCalls.sort((a, b) => a.imgSpec.zIndex - b.imgSpec.zIndex);
-
-    // Draw placeholders first (lowest priority)
-    for (const call of placeholderCalls) {
-      this._renderer.drawPlaceholder(call.col, call.row, call.count);
-    }
-
-    // Draw images in z-index order
-    for (const call of drawCalls) {
-      this._renderer.draw(call.imgSpec, call.tileId, call.col, call.row, call.count);
-    }
-  }
-
-  public viewportResize(metrics: { cols: number, rows: number }): void {
-    // exit early if we have nothing in storage
-    if (!this._images.size) {
-      this._viewportMetrics = metrics;
-      return;
-    }
-
-    // handle only viewport width enlargements, exit all other cases
-    // TODO: needs patch for tile counter
-    if (this._viewportMetrics.cols >= metrics.cols) {
-      this._viewportMetrics = metrics;
-      return;
-    }
-
-    // walk scrollbuffer at old col width to find all possible expansion matches
-    const buffer = this._terminal._core.buffer;
-    const rows = buffer.lines.length;
-    const oldCol = this._viewportMetrics.cols - 1;
-    for (let row = 0; row < rows; ++row) {
-      const line = buffer.lines.get(row) as IBufferLineExt;
-      if (line.getBg(oldCol) & BgFlags.HAS_EXTENDED) {
-        const e: IExtendedAttrsImage = line._extendedAttrs[oldCol] ?? EMPTY_ATTRS;
-        const imageId = e.imageId;
-        if (imageId === undefined || imageId === -1) {
-          continue;
-        }
-        const imgSpec = this._images.get(imageId);
-        if (!imgSpec) {
-          continue;
-        }
-        // found an image tile at oldCol, check if it qualifies for right exapansion
-        const tilesPerRow = Math.ceil((imgSpec.actual?.width || 0) / imgSpec.actualCellSize.width);
-        if ((e.tileId % tilesPerRow) + 1 >= tilesPerRow) {
-          continue;
-        }
-        // expand only if right side is empty (nothing got wrapped from below)
-        let hasData = false;
-        for (let rightCol = oldCol + 1; rightCol > metrics.cols; ++rightCol) {
-          if (line._data[rightCol * Cell.SIZE + Cell.CONTENT] & Content.HAS_CONTENT_MASK) {
-            hasData = true;
-            break;
-          }
-        }
-        if (hasData) {
-          continue;
-        }
-        // do right expansion on terminal buffer
-        const end = Math.min(metrics.cols, tilesPerRow - (e.tileId % tilesPerRow) + oldCol);
-        let lastTile = e.tileId;
-        for (let expandCol = oldCol + 1; expandCol < end; ++expandCol) {
-          this._writeToCell(line as IBufferLineExt, expandCol, imageId, ++lastTile);
-          imgSpec.tileCount++;
-        }
-      }
-    }
-    // store new viewport metrics
-    this._viewportMetrics = metrics;
-  }
-
-  /**
-   * Retrieve original canvas at buffer position.
-   */
-  public getImageAtBufferCell(x: number, y: number): HTMLCanvasElement | undefined {
-    const buffer = this._terminal._core.buffer;
-    const line = buffer.lines.get(y) as IBufferLineExt;
-    if (line && line.getBg(x) & BgFlags.HAS_EXTENDED) {
-      const e: IExtendedAttrsImage = line._extendedAttrs[x] ?? EMPTY_ATTRS;
-      if (e.imageId && e.imageId !== -1) {
-        const orig = this._images.get(e.imageId)?.orig;
-        if (window.ImageBitmap && orig instanceof ImageBitmap) {
-          const canvas = ImageRenderer.createCanvas(window.document, orig.width, orig.height);
-          canvas.getContext('2d')?.drawImage(orig, 0, 0, orig.width, orig.height);
-          return canvas;
-        }
-        return orig as HTMLCanvasElement;
-      }
-    }
-  }
-
-  /**
-   * Extract active single tile at buffer position.
-   */
-  public extractTileAtBufferCell(x: number, y: number): HTMLCanvasElement | undefined {
-    const buffer = this._terminal._core.buffer;
-    const line = buffer.lines.get(y) as IBufferLineExt;
-    if (line && line.getBg(x) & BgFlags.HAS_EXTENDED) {
-      const e: IExtendedAttrsImage = line._extendedAttrs[x] ?? EMPTY_ATTRS;
-      if (e.imageId && e.imageId !== -1 && e.tileId !== -1) {
-        const spec = this._images.get(e.imageId);
-        if (spec) {
-          return this._renderer.extractTile(spec, e.tileId);
-        }
-      }
-    }
-  }
-
-  // TODO: Do we need some blob offloading tricks here to avoid early eviction?
-  // also see https://stackoverflow.com/questions/28307789/is-there-any-limitation-on-javascript-max-blob-size
-  private _evictOldest(room: number): number {
-    const used = this._getStoredPixels();
-    let current = used;
-    while (this._pixelLimit < current + room && this._images.size) {
-      const spec = this._images.get(++this._lowestId);
-      if (spec && spec.orig) {
-        current -= spec.orig.width * spec.orig.height;
-        if (spec.actual && spec.orig !== spec.actual) {
-          current -= spec.actual.width * spec.actual.height;
-        }
-        spec.marker?.dispose();
-        this._delImg(this._lowestId);
-      }
-    }
-    return used - current;
-  }
-
-  private _writeToCell(line: IBufferLineExt, x: number, imageId: number, tileId: number): void {
-    if (line._data[x * Cell.SIZE + Cell.BG] & BgFlags.HAS_EXTENDED) {
-      const old = line._extendedAttrs[x];
-      if (old) {
-        if (old.imageId !== undefined) {
-          // found an old ExtendedAttrsImage, since we know that
-          // they are always isolated instances (single cell usage),
-          // we can re-use it and just update their id entries
-          const oldSpec = this._images.get(old.imageId);
-          if (oldSpec) {
-            // early eviction for in-viewport overwrites
-            oldSpec.tileCount--;
-          }
-          old.imageId = imageId;
-          old.tileId = tileId;
-          return;
-        }
-        // found a plain ExtendedAttrs instance, clone it to new entry
-        line._extendedAttrs[x] = new ExtendedAttrsImage(old.ext, old.urlId, imageId, tileId);
-        return;
-      }
-    }
-    // fall-through: always create new ExtendedAttrsImage entry
-    line._data[x * Cell.SIZE + Cell.BG] |= BgFlags.HAS_EXTENDED;
-    line._extendedAttrs[x] = new ExtendedAttrsImage(0, 0, imageId, tileId);
-  }
-
-  private _evictOnAlternate(): void {
-    // nullify tile count of all images on alternate buffer
-    for (const spec of this._images.values()) {
-      if (spec.bufferType === 'alternate') {
-        spec.tileCount = 0;
-      }
-    }
-    // re-count tiles on whole buffer
-    const buffer = this._terminal._core.buffer;
-    for (let y = 0; y < this._terminal.rows; ++y) {
-      const line = buffer.lines.get(y) as IBufferLineExt;
-      if (!line) {
-        continue;
-      }
-      for (let x = 0; x < this._terminal.cols; ++x) {
-        if (line._data[x * Cell.SIZE + Cell.BG] & BgFlags.HAS_EXTENDED) {
-          const imgId = line._extendedAttrs[x]?.imageId;
-          if (imgId) {
-            const spec = this._images.get(imgId);
-            if (spec) {
-              spec.tileCount++;
-            }
-          }
-        }
-      }
-    }
-    // deleted images with zero tile count
-    const zero = [];
-    for (const [id, spec] of this._images.entries()) {
-      if (spec.bufferType === 'alternate' && !spec.tileCount) {
-        spec.marker?.dispose();
-        zero.push(id);
-      }
-    }
-    for (const id of zero) {
-      this._delImg(id);
-    }
-  }
-}

addons/addon-image/src/SixelHandler.ts

@@ -1,151 +0,0 @@
-/**
- * Copyright (c) 2020, 2023 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-import { SixelImageStorage } from './SixelImageStorage';
-import { IDcsHandler, IParams, IImageAddonOptions, ITerminalExt, AttributeData, IResetHandler, ReadonlyColorSet } from './Types';
-import { toRGBA8888, BIG_ENDIAN, PALETTE_ANSI_256, PALETTE_VT340_COLOR } from 'sixel/lib/Colors';
-import { RGBA8888 } from 'sixel/lib/Types';
-import { ImageRenderer } from './ImageRenderer';
-
-import { DecoderAsync, Decoder } from 'sixel/lib/Decoder';
-
-// always free decoder ressources after decoding if it exceeds this limit
-const MEM_PERMA_LIMIT = 4194304; // 1024 pixels * 1024 pixels * 4 channels = 4MB
-
-// custom default palette: VT340 (lower 16 colors) + ANSI256 (up to 256) + zeroed (up to 4096)
-const DEFAULT_PALETTE = PALETTE_ANSI_256;
-DEFAULT_PALETTE.set(PALETTE_VT340_COLOR);
-
-
-export class SixelHandler implements IDcsHandler, IResetHandler {
-  private _size = 0;
-  private _aborted = false;
-  private _dec: Decoder | undefined;
-
-  constructor(
-    private readonly _opts: IImageAddonOptions,
-    private readonly _storage: SixelImageStorage,
-    private readonly _coreTerminal: ITerminalExt
-  ) {
-    DecoderAsync({
-      memoryLimit: this._opts.pixelLimit * 4,
-      palette: DEFAULT_PALETTE,
-      paletteLimit: this._opts.sixelPaletteLimit
-    }).then(d => this._dec = d);
-  }
-
-  public reset(): void {
-    /**
-     * reset sixel decoder to defaults:
-     * - release all memory
-     * - nullify palette (4096)
-     * - apply default palette (256)
-     */
-    if (this._dec) {
-      this._dec.release();
-      // FIXME: missing interface on decoder to nullify full palette
-      (this._dec as any)._palette.fill(0);
-      this._dec.init(0, DEFAULT_PALETTE, this._opts.sixelPaletteLimit);
-    }
-  }
-
-  public hook(params: IParams): void {
-    this._size = 0;
-    this._aborted = false;
-    if (this._dec) {
-      const fillColor = params.params[1] === 1 ? 0 : extractActiveBg(
-        this._coreTerminal._core._inputHandler._curAttrData,
-        this._coreTerminal._core._themeService?.colors);
-      this._dec.init(fillColor, null, this._opts.sixelPaletteLimit);
-    }
-  }
-
-  public put(data: Uint32Array, start: number, end: number): void {
-    if (this._aborted || !this._dec) {
-      return;
-    }
-    this._size += end - start;
-    if (this._size > this._opts.sixelSizeLimit) {
-      console.warn(`SIXEL: too much data, aborting`);
-      this._aborted = true;
-      this._dec.release();
-      return;
-    }
-    try {
-      this._dec.decode(data, start, end);
-    } catch (e) {
-      console.warn(`SIXEL: error while decoding image - ${e}`);
-      this._aborted = true;
-      this._dec.release();
-    }
-  }
-
-  public unhook(success: boolean): boolean | Promise<boolean> {
-    if (this._aborted || !success || !this._dec) {
-      return true;
-    }
-
-    const width = this._dec.width;
-    const height = this._dec.height;
-
-    // partial fix for https://github.com/jerch/xterm-addon-image/issues/37
-    if (!width || !height) {
-      if (height) {
-        this._storage.advanceCursor(height);
-      }
-      return true;
-    }
-
-    const canvas = ImageRenderer.createCanvas(undefined, width, height);
-    canvas.getContext('2d')?.putImageData(new ImageData(this._dec.data8 as Uint8ClampedArray<ArrayBuffer>, width, height), 0, 0);
-    if (this._dec.memoryUsage > MEM_PERMA_LIMIT) {
-      this._dec.release();
-    }
-    this._storage.addImage(canvas);
-    return true;
-  }
-}
-
-
-/**
- * Some helpers to extract current terminal colors.
- */
-
-// get currently active background color from terminal
-// also respect INVERSE setting
-function extractActiveBg(attr: AttributeData, colors: ReadonlyColorSet | undefined): RGBA8888 {
-  let bg = 0;
-  if (!colors) {
-    // FIXME: theme service is prolly not available yet,
-    // happens if .open() was not called yet (bug in core?)
-    return bg;
-  }
-  if (attr.isInverse()) {
-    if (attr.isFgDefault()) {
-      bg = convertLe(colors.foreground.rgba);
-    } else if (attr.isFgRGB()) {
-      const t = (attr.constructor as typeof AttributeData).toColorRGB(attr.getFgColor());
-      bg = toRGBA8888(...t);
-    } else {
-      bg = convertLe(colors.ansi[attr.getFgColor()].rgba);
-    }
-  } else {
-    if (attr.isBgDefault()) {
-      bg = convertLe(colors.background.rgba);
-    } else if (attr.isBgRGB()) {
-      const t = (attr.constructor as typeof AttributeData).toColorRGB(attr.getBgColor());
-      bg = toRGBA8888(...t);
-    } else {
-      bg = convertLe(colors.ansi[attr.getBgColor()].rgba);
-    }
-  }
-  return bg;
-}
-
-// rgba values on the color managers are always in BE, thus convert to LE
-function convertLe(color: number): RGBA8888 {
-  if (BIG_ENDIAN) return color;
-  return (color & 0xFF) << 24 | (color >>> 8 & 0xFF) << 16 | (color >>> 16 & 0xFF) << 8 | color >>> 24 & 0xFF;
-}

addons/addon-image/src/SixelImageStorage.ts

@@ -1,50 +0,0 @@
-/**
- * Copyright (c) 2020 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-import { ImageStorage, CELL_SIZE_DEFAULT } from './ImageStorage';
-import { IImageAddonOptions, ITerminalExt } from './Types';
-import { ImageRenderer } from './ImageRenderer';
-
-/**
- * Sixel-specific image storage controller.
- *
- * Wraps the shared ImageStorage with sixel protocol semantics:
- * - Cursor behavior governed by DECSET 80 (sixelScrolling option)
- * - advanceCursor for empty sixels carrying only height
- */
-export class SixelImageStorage {
-  constructor(
-    private readonly _storage: ImageStorage,
-    private readonly _opts: IImageAddonOptions,
-    private readonly _renderer: ImageRenderer,
-    private readonly _terminal: ITerminalExt
-  ) {}
-
-  /**
-   * Add a sixel image to storage.
-   * Cursor behavior depends on the sixelScrolling option (DECSET 80).
-   */
-  public addImage(img: HTMLCanvasElement | ImageBitmap): void {
-    this._storage.addImage(img, this._opts.sixelScrolling);
-  }
-
-  /**
-   * Only advance text cursor.
-   * This is an edge case from empty sixels carrying only a height but no pixels.
-   * Partially fixes https://github.com/jerch/xterm-addon-image/issues/37.
-   */
-  public advanceCursor(height: number): void {
-    if (this._opts.sixelScrolling) {
-      let cellSize = this._renderer.cellSize;
-      if (cellSize.width === -1 || cellSize.height === -1) {
-        cellSize = CELL_SIZE_DEFAULT;
-      }
-      const rows = Math.ceil(height / cellSize.height);
-      for (let i = 1; i < rows; ++i) {
-        this._terminal._core._inputHandler.lineFeed();
-      }
-    }
-  }
-}

addons/addon-image/src/Types.ts

@@ -1,114 +0,0 @@
-/**
- * Copyright (c) 2020 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-import { IDisposable, IMarker, Terminal } from '@xterm/xterm';
-
-// private imports from base repo we build against
-import { Attributes, BgFlags, Content, ExtFlags, UnderlineStyle } from '../../../src/common/buffer/Constants';
-import type { AttributeData } from '../../../src/common/buffer/AttributeData';
-import type { IParams, IDcsHandler, IOscHandler, IApcHandler, IEscapeSequenceParser } from '../../../src/common/parser/Types';
-import type { IBufferLine, IExtendedAttrs, IInputHandler } from '../../../src/common/Types';
-import type { ITerminal, ReadonlyColorSet } from '../../../src/browser/Types';
-import type { IRenderDimensions } from '../../../src/browser/renderer/shared/Types';
-import type { ICoreBrowserService, IRenderService, IThemeService } from '../../../src/browser/services/Services';
-
-export const enum Cell {
-  CONTENT = 0,  // codepoint and wcwidth information (enum Content)
-  FG = 1,       // foreground color in lower 3 bytes (rgb), attrs in 4th byte (enum FgFlags)
-  BG = 2,       // background color in lower 3 bytes (rgb), attrs in 4th byte (enum BgFlags)
-  SIZE = 3      // size of single cell on buffer array
-}
-
-// export some privates for local usage
-export { AttributeData, IParams, IDcsHandler, IOscHandler, IApcHandler, BgFlags, IRenderDimensions, IRenderService, Content, ExtFlags, Attributes, UnderlineStyle, ReadonlyColorSet };
-
-/**
- * Plugin ctor options.
- */
-export interface IImageAddonOptions {
-  enableSizeReports: boolean;
-  pixelLimit: number;
-  storageLimit: number;
-  showPlaceholder: boolean;
-  sixelSupport: boolean;
-  sixelScrolling: boolean;
-  sixelPaletteLimit: number;
-  sixelSizeLimit: number;
-  iipSupport: boolean;
-  iipSizeLimit: number;
-  kittySupport: boolean;
-  kittySizeLimit: number;
-}
-
-export interface IResetHandler {
-  // attached to RIS and DECSTR
-  reset(): void;
-}
-
-/**
- * Stub into private interfaces.
- * This should be kept in line with common libs.
- * Any change made here should be replayed in the accessors test case to
- * have a somewhat reliable testing against code changes in the core repo.
- */
-
-// overloaded IExtendedAttrs to hold image refs
-export interface IExtendedAttrsImage extends IExtendedAttrs {
-  imageId: number;
-  tileId: number;
-  clone(): IExtendedAttrsImage;
-}
-
-/* eslint-disable */
-export interface IBufferLineExt extends IBufferLine {
-  _extendedAttrs: {[index: number]: IExtendedAttrsImage | undefined};
-  _data: Uint32Array;
-}
-
-interface IInputHandlerExt extends IInputHandler {
-  _parser: IEscapeSequenceParser;
-  _curAttrData: AttributeData;
-  _dirtyRowTracker: {
-    markRangeDirty(y1: number, y2: number): void;
-    markAllDirty(): void;
-    markDirty(y: number): void;
-  };
-  onRequestReset(handler: () => void): IDisposable;
-}
-
-export interface ICoreTerminalExt extends ITerminal {
-  _themeService: IThemeService | undefined;
-  _inputHandler: IInputHandlerExt;
-  _renderService: IRenderService;
-  _coreBrowserService: ICoreBrowserService | undefined;
-}
-
-export interface ITerminalExt extends Terminal {
-  _core: ICoreTerminalExt;
-}
-/* eslint-enable */
-
-
-/**
- * Some storage definitions.
- */
-export interface ICellSize {
-  width: number;
-  height: number;
-}
-
-export type ImageLayer = 'top' | 'bottom';
-
-export interface IImageSpec {
-  orig: HTMLCanvasElement | ImageBitmap | undefined;
-  origCellSize: ICellSize;
-  actual: HTMLCanvasElement | ImageBitmap | undefined;
-  actualCellSize: ICellSize;
-  marker: IMarker | undefined;
-  tileCount: number;
-  bufferType: 'alternate' | 'normal';
-  layer: ImageLayer;
-  zIndex: number;
-}

addons/addon-image/src/kitty/KittyGraphicsHandler.ts

@@ -1,819 +0,0 @@
-/**
- * Copyright (c) 2026 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-import { IDisposable } from '@xterm/xterm';
-import { IApcHandler, IImageAddonOptions, IResetHandler, ITerminalExt, ImageLayer } from '../Types';
-import { ImageRenderer } from '../ImageRenderer';
-import { CELL_SIZE_DEFAULT } from '../ImageStorage';
-import { KittyImageStorage } from './KittyImageStorage';
-import Base64Decoder, { type DecodeStatus } from 'xterm-wasm-parts/lib/base64/Base64Decoder.wasm';
-import {
-  KittyAction,
-  KittyFormat,
-  KittyCompression,
-  IKittyCommand,
-  IPendingTransmission,
-  IKittyImageData,
-  KittyPixelConstants,
-  parseKittyCommand
-} from './KittyGraphicsTypes';
-
-const enum Constants {
-  // Memory limit for base64 decoder (4MB, same as IIPHandler)
-  DECODER_KEEP_DATA = 4194304,
-  DECODER_INITIAL_DATA = 4194304, // 4MB
-  // Local mirror of const enum (esbuild can't inline const enums from external packages)
-  DECODER_OK = 0,
-  // Maximum control data size
-  MAX_CONTROL_DATA_SIZE = 512,
-  // Semicolon codepoint
-  SEMICOLON = 0x3B
-}
-
-const DECODER_OK = Constants.DECODER_OK as unknown as DecodeStatus.OK;
-
-// Kitty graphics protocol handler with streaming base64 decoding.
-export class KittyGraphicsHandler implements IApcHandler, IResetHandler, IDisposable {
-  private _aborted = false;
-  private _decodeError = false;
-
-  private _activeDecoder: Base64Decoder | null = null;
-  private readonly _maxEncodedBytes: number;
-  private readonly _initialEncodedBytes: number;
-
-  // Streaming related states
-
-  // True while receiving control data (before semicolon).
-  private _inControlData = true;
-
-  // Buffer for control data.
-  private _controlData = new Uint32Array(Constants.MAX_CONTROL_DATA_SIZE);
-  private _controlLength = 0;
-
-  // Pre-calculated encoded size limit
-  private _encodedSizeLimit = 0;
-  private _totalEncodedSize = 0;
-
-  // Parsed command. These are the control data before semicolon.
-  private _parsedCommand: IKittyCommand | null = null;
-
-  // Storage related states
-
-  private _pendingTransmissions: Map<number, IPendingTransmission> = new Map();
-  // Tracks the pending key of the most recently started chunked upload.
-  // Per spec, subsequent chunks only need m= (and optionally q=), without i=.
-  // When a chunk arrives with no i=, this key is used to find the pending upload.
-  private _lastPendingKey: number | undefined;
-
-  constructor(
-    private readonly _opts: IImageAddonOptions,
-    private readonly _renderer: ImageRenderer,
-    private readonly _kittyStorage: KittyImageStorage,
-    private readonly _coreTerminal: ITerminalExt
-  ) {
-    // Convert decoded size limit -> max encoded bytes.
-    this._maxEncodedBytes = Math.ceil(this._opts.kittySizeLimit * 4 / 3);
-    // ensure we preallocate more than configured limit while using 4mb initial size.
-    this._initialEncodedBytes = Math.min(Constants.DECODER_INITIAL_DATA, this._maxEncodedBytes);
-  }
-
-  public reset(): void {
-    this._cleanupAllPending();
-    if (this._activeDecoder) {
-      this._activeDecoder.release();
-      this._activeDecoder = null;
-    }
-    this._kittyStorage.reset();
-  }
-
-  public dispose(): void {
-    this.reset();
-  }
-
-  private _removePendingEntry(key: number): void {
-    this._pendingTransmissions.delete(key);
-    if (this._lastPendingKey === key) {
-      this._lastPendingKey = undefined;
-    }
-  }
-
-  private _cleanupAllPending(): void {
-    for (const pending of this._pendingTransmissions.values()) {
-      pending.decoder.release();
-    }
-    this._pendingTransmissions.clear();
-    this._lastPendingKey = undefined;
-  }
-
-  public start(): void {
-    this._aborted = false;
-    this._decodeError = false;
-    this._inControlData = true;
-    this._controlLength = 0;
-    this._parsedCommand = null;
-    // Pre-calculate encoded limit once: base64 is 4 bytes encoded → 3 bytes decoded
-    this._encodedSizeLimit = this._maxEncodedBytes;
-    this._totalEncodedSize = 0;
-    this._activeDecoder = null;
-  }
-
-  public put(data: Uint32Array, start: number, end: number): void {
-    if (this._aborted) return;
-
-    if (!this._inControlData) {
-      this._streamPayload(data, start, end);
-    } else {
-      // Scan for semicolon
-      let controlEnd = end;
-      for (let i = start; i < end; i++) {
-        if (data[i] === Constants.SEMICOLON) {
-          this._inControlData = false;
-          controlEnd = i;
-          break;
-        }
-      }
-
-      // Copy control data
-      const copyLength = controlEnd - start;
-      if (this._controlLength + copyLength > Constants.MAX_CONTROL_DATA_SIZE) {
-        this._aborted = true;
-        return;
-      }
-      this._controlData.set(data.subarray(start, controlEnd), this._controlLength);
-      this._controlLength += copyLength;
-
-      if (!this._inControlData) {
-        // Found semicolon - parse control data early for validation
-        this._parsedCommand = parseKittyCommand(this._parseControlDataString());
-
-        // Early validation: i+I conflict
-        if (this._parsedCommand.id !== undefined && this._parsedCommand.imageNumber !== undefined) {
-          this._sendResponse(this._parsedCommand.id, 'EINVAL:cannot specify both i and I keys', this._parsedCommand.quiet ?? 0);
-          this._aborted = true;
-          return;
-        }
-
-        // Delete action doesn't need payload - skip streaming
-        if (this._parsedCommand.action === KittyAction.DELETE) {
-          return;
-        }
-
-        // Stream remaining as payload
-        const payloadStart = controlEnd + 1;
-        if (payloadStart < end) {
-          this._streamPayload(data, payloadStart, end);
-        }
-      }
-    }
-  }
-
-  // Stream payload bytes into the base64 decoder.
-  private _streamPayload(data: Uint32Array, start: number, end: number): void {
-    if (this._aborted) return;
-
-    // Check size limit (compare encoded bytes against pre-calculated limit)
-    // Include cumulative size from pending transmission for multi-chunk images.
-    // Per spec, subsequent chunks may omit i=, so fall back to _lastPendingKey.
-    const pendingKey = this._parsedCommand?.id ?? this._lastPendingKey ?? 0;
-    const pending = this._pendingTransmissions.get(pendingKey);
-    const previousEncodedSize = pending?.totalEncodedSize ?? 0;
-    this._totalEncodedSize += end - start;
-    const cumulativeEncodedSize = previousEncodedSize + this._totalEncodedSize;
-    if (cumulativeEncodedSize > this._encodedSizeLimit) {
-      const decoderToRelease = this._activeDecoder ?? pending?.decoder;
-      if (decoderToRelease) {
-        decoderToRelease.release();
-      }
-      this._activeDecoder = null;
-      if (pending) {
-        this._removePendingEntry(pendingKey);
-      }
-      this._aborted = true;
-      return;
-    }
-
-    if (this._decodeError) return;
-
-    if (pending?.decoder && !this._activeDecoder) {
-      this._activeDecoder = pending.decoder;
-    }
-    if (!this._activeDecoder) {
-      this._activeDecoder = new Base64Decoder(Constants.DECODER_KEEP_DATA, this._maxEncodedBytes, this._initialEncodedBytes);
-      this._activeDecoder.init();
-    }
-
-    if (this._activeDecoder.put(data.subarray(start, end)) !== DECODER_OK) {
-      this._activeDecoder.release();
-      this._activeDecoder = null;
-      this._decodeError = true;
-      if (pending) {
-        this._removePendingEntry(pendingKey);
-      }
-    }
-  }
-
-  public end(success: boolean): boolean | Promise<boolean> {
-    if (this._aborted || !success) {
-      if (this._activeDecoder) {
-        this._activeDecoder.release();
-        this._activeDecoder = null;
-      }
-      return true;
-    }
-
-    // No semicolon = no payload (delete, capability query)
-    if (this._inControlData) {
-      return this._handleNoPayloadCommand();
-    }
-
-    // Use command parsed early in put() - i+I already validated there
-    const cmd = this._parsedCommand!;
-
-    // Delete action was handled by skipping payload - just execute
-    if (cmd.action === KittyAction.DELETE) {
-      return this._handleDelete(cmd);
-    }
-
-    // Per spec, subsequent chunks may omit i=, so fall back to _lastPendingKey.
-    const pendingKey = cmd.id ?? this._lastPendingKey ?? 0;
-    const isMoreComing = cmd.more === 1;
-    const pending = this._pendingTransmissions.get(pendingKey);
-
-    if (isMoreComing) {
-      if (this._activeDecoder) {
-        if (pending) {
-          pending.totalEncodedSize += this._totalEncodedSize;
-          pending.decodeError = pending.decodeError || this._decodeError;
-        } else {
-          this._pendingTransmissions.set(pendingKey, {
-            cmd: { ...cmd },
-            decoder: this._activeDecoder,
-            totalEncodedSize: this._totalEncodedSize,
-            decodeError: this._decodeError
-          });
-        }
-        this._lastPendingKey = pendingKey;
-        this._activeDecoder = null;
-      }
-      return true;
-    }
-
-    // Final chunk received — clear the last pending key
-    if (pending) {
-      this._lastPendingKey = undefined;
-    }
-
-    let decodeError = this._decodeError;
-    let finalCmd = cmd;
-    let decoder = this._activeDecoder;
-
-    if (pending) {
-      finalCmd = pending.cmd;
-      decoder = pending.decoder;
-      decodeError = decodeError || pending.decodeError;
-      this._pendingTransmissions.delete(pendingKey);
-    }
-
-    let imageBytes = new Uint8Array(0);
-    if (decoder) {
-      if (decoder.end() !== DECODER_OK) {
-        decodeError = true;
-      }
-      imageBytes = decoder.data8;
-    }
-    this._activeDecoder = null;
-
-    // Handle command first — handlers create Blob/ImageData from imageBytes,
-    // which copies the data. Only then is it safe to release the decoder's
-    // wasm memory that imageBytes points into.
-    const result = this._handleCommandWithBytesAndCmd(finalCmd, imageBytes, decodeError);
-    if (decoder) {
-      decoder.release();
-    }
-    return result;
-  }
-
-  // Command handling
-
-  private _parseControlDataString(): string {
-    let str = '';
-    for (let i = 0; i < this._controlLength; i++) {
-      str += String.fromCodePoint(this._controlData[i]);
-    }
-    return str;
-  }
-
-  private _handleNoPayloadCommand(): boolean | Promise<boolean> {
-    const cmd = parseKittyCommand(this._parseControlDataString());
-
-    // Per spec: specifying both i and I is an error
-    if (cmd.id !== undefined && cmd.imageNumber !== undefined) {
-      this._sendResponse(cmd.id, 'EINVAL:cannot specify both i and I keys', cmd.quiet ?? 0);
-      return true;
-    }
-
-    const action = cmd.action ?? 't';
-
-    switch (action) {
-      case KittyAction.DELETE:
-        return this._handleDelete(cmd);
-      case KittyAction.QUERY:
-        this._sendResponse(cmd.id ?? 0, 'OK', cmd.quiet ?? 0);
-        return true;
-      case KittyAction.PLACEMENT:
-        return this._handlePlacement(cmd);
-      default:
-        // TODO: Implement remaining actions when needed:
-        // - a=f (frame): animation frame operations
-        // - a=a (animation): animation control
-        // - a=c (compose): compose images
-        if (cmd.id !== undefined) {
-          this._sendResponse(cmd.id, 'EINVAL:unsupported action', cmd.quiet ?? 0);
-        }
-        return true;
-    }
-  }
-
-  private _handleCommandWithBytesAndCmd(cmd: IKittyCommand, bytes: Uint8Array, decodeError: boolean): boolean | Promise<boolean> {
-    const action = cmd.action ?? 't';
-
-    switch (action) {
-      case KittyAction.TRANSMIT: {
-        const result = this._handleTransmit(cmd, bytes, decodeError);
-        // Only send response when _handleTransmit didn't already respond
-        // (it handles unsupported transmission medium responses internally)
-        if ((cmd.transmission ?? 'd') === 'd' && cmd.id !== undefined) {
-          if (decodeError) {
-            this._sendResponse(cmd.id, 'EINVAL:invalid base64 data', cmd.quiet ?? 0);
-          } else if (bytes.length > 0) {
-            this._sendResponse(cmd.id, 'OK', cmd.quiet ?? 0);
-          }
-        }
-        return result;
-      }
-      case KittyAction.TRANSMIT_DISPLAY:
-        return this._handleTransmitDisplay(cmd, bytes, decodeError);
-      case KittyAction.QUERY:
-        return this._handleQuery(cmd, bytes, decodeError);
-      case KittyAction.PLACEMENT:
-        // a=p ignores any payload — image data was already transmitted
-        return this._handlePlacement(cmd);
-      default:
-        // TODO: Implement remaining actions when needed:
-        // - a=f (frame): animation frame operations
-        // - a=a (animation): animation control
-        // - a=c (compose): compose images
-        if (cmd.id !== undefined) {
-          this._sendResponse(cmd.id, 'EINVAL:unsupported action', cmd.quiet ?? 0);
-        }
-        return true;
-    }
-  }
-
-  private _handlePlacement(cmd: IKittyCommand): boolean | Promise<boolean> {
-    if (cmd.id === undefined) {
-      return true;
-    }
-    const id = cmd.id;
-    const image = this._kittyStorage.getImage(id);
-    if (!image) {
-      this._sendResponse(id, 'ENOENT:image not found', cmd.quiet ?? 0, cmd.placementId);
-      return true;
-    }
-    const result = this._displayImage(image, cmd);
-    return result.then(success => {
-      this._sendResponse(id, success ? 'OK' : 'EINVAL:image rendering failed', cmd.quiet ?? 0, cmd.placementId);
-      return true;
-    });
-  }
-
-  private _handleTransmit(cmd: IKittyCommand, bytes: Uint8Array, decodeError: boolean): boolean {
-    // TODO: Support file-based transmission modes (t=f, t=t, t=s)
-    // Currently only supports direct transmission (t=d, the default).
-    // - t=f (file): Payload is base64-encoded file path. Terminal reads image from that path.
-    // - t=t (temp file): Payload is base64-encoded path in temp directory. Terminal reads, deletes.
-    // - t=s: Payload is base64-encoded POSIX shm name. Terminal reads from shared memory.
-    // These modes require filesystem/IPC access not available in browsers. For Node.js/Electron:
-    // 1. Check cmd.transmission (t key) before treating bytes as image data
-    // 2. For t=f/t/s: decode bytes as UTF-8 string (the path/name), then read file contents
-    // 3. For t=d: treat bytes as image data (current behavior)
-    // When implementing, also update _handleQuery to accept these transmission mediums.
-    const transmission = cmd.transmission ?? 'd';
-    if (transmission !== 'd') {
-      if (cmd.id !== undefined) {
-        this._sendResponse(cmd.id, 'EINVAL:unsupported transmission medium', cmd.quiet ?? 0);
-      }
-      return true;
-    }
-
-    if (decodeError || bytes.length === 0) return true;
-
-    this._kittyStorage.storeImage(cmd.id, {
-      data: new Blob([bytes as BlobPart]),
-      width: cmd.width ?? 0,
-      height: cmd.height ?? 0,
-      format: (cmd.format ?? KittyFormat.RGBA) as 24 | 32 | 100,
-      compression: cmd.compression ?? ''
-    });
-    return true;
-  }
-
-  private _handleTransmitDisplay(cmd: IKittyCommand, bytes: Uint8Array, decodeError: boolean): boolean | Promise<boolean> {
-    if (decodeError) {
-      if (cmd.id !== undefined) {
-        this._sendResponse(cmd.id, 'EINVAL:invalid base64 data', cmd.quiet ?? 0);
-      }
-      return true;
-    }
-
-    this._handleTransmit(cmd, bytes, decodeError);
-
-    const id = cmd.id ?? this._kittyStorage.lastImageId;
-    const image = this._kittyStorage.getImage(id);
-    if (image) {
-      const result = this._displayImage(image, cmd);
-      if (cmd.id !== undefined) {
-        return result.then(success => {
-          this._sendResponse(id, success ? 'OK' : 'EINVAL:image rendering failed', cmd.quiet ?? 0);
-          return true;
-        });
-      }
-      return result.then(() => true);
-    }
-    return true;
-  }
-
-  private _handleQuery(cmd: IKittyCommand, bytes: Uint8Array, decodeError: boolean): boolean {
-    const id = cmd.id ?? 0;
-    const quiet = cmd.quiet ?? 0;
-
-    // Per spec: reject unsupported transmission mediums (only t=d is supported atm)
-    // TODO: When filesystem support is added (Node.js/Electron), update this to accept
-    // t=f (file), t=t (temp file), and t=s (shared memory) and respond OK for queries.
-    const transmission = cmd.transmission ?? 'd';
-    if (transmission !== 'd') {
-      this._sendResponse(id, 'EINVAL:unsupported transmission medium', quiet);
-      return true;
-    }
-
-    // Check decode error first (invalid base64)
-    if (decodeError) {
-      this._sendResponse(id, 'EINVAL:invalid base64 data', quiet);
-      return true;
-    }
-
-    // Capability query (no payload) - just respond OK
-    if (bytes.length === 0) {
-      this._sendResponse(id, 'OK', quiet);
-      return true;
-    }
-
-    const format = cmd.format ?? KittyFormat.RGBA;
-
-    if (format === KittyFormat.PNG) {
-      this._sendResponse(id, 'OK', quiet);
-    } else {
-      const width = cmd.width ?? 0;
-      const height = cmd.height ?? 0;
-
-      if (!width || !height) {
-        this._sendResponse(id, 'EINVAL:width and height required for raw pixel data', quiet);
-        return true;
-      }
-
-      const bytesPerPixel = format === KittyFormat.RGBA ? KittyPixelConstants.BYTES_PER_PIXEL_RGBA : KittyPixelConstants.BYTES_PER_PIXEL_RGB;
-      const expectedBytes = width * height * bytesPerPixel;
-
-      if (bytes.length < expectedBytes) {
-        this._sendResponse(id, `EINVAL:insufficient pixel data`, quiet);
-        return true;
-      }
-
-      this._sendResponse(id, 'OK', quiet);
-    }
-    return true;
-  }
-
-  private _handleDelete(cmd: IKittyCommand): boolean {
-    // Per spec: default delete selector is 'a' (delete all visible placements)
-    const selector = cmd.deleteSelector ?? 'a';
-
-    // TODO: Distinguish lowercase (delete placements only) from uppercase
-    // (delete placements + free stored image data). Currently both variants
-    // free everything since we don't separate stored data from placements.
-    switch (selector) {
-      case 'a':
-      case 'A':
-        this._cleanupAllPending();
-        this._kittyStorage.deleteAll();
-        break;
-      case 'i':
-      case 'I':
-        // TODO: When placement id tracking is implemented (see TODO in
-        // KittyImageStorage), d=i with p=<pid> should delete only that
-        // specific placement, while d=i without p should delete all
-        // placements for the image.
-        if (cmd.id !== undefined) {
-          const pending = this._pendingTransmissions.get(cmd.id);
-          if (pending) {
-            pending.decoder.release();
-          }
-          this._removePendingEntry(cmd.id);
-          this._kittyStorage.deleteById(cmd.id);
-        }
-        break;
-      default:
-        // Unsupported selectors (c, n, p, q, r, x, y, z, f) — ignore for now
-        break;
-    }
-    return true;
-  }
-
-  private _sendResponse(id: number, message: string, quiet: number, placementId?: number): void {
-    const isOk = message === 'OK';
-    if (isOk && quiet >= 1) return;
-    if (!isOk && quiet >= 2) return;
-
-    const pPart = placementId ? `,p=${placementId}` : '';
-    const response = `\x1b_Gi=${id}${pPart};${message}\x1b\\`;
-    this._coreTerminal._core.coreService.triggerDataEvent(response);
-  }
-
-  // Image display
-
-  private _displayImage(image: IKittyImageData, cmd: IKittyCommand): Promise<boolean> {
-    return this._decodeAndDisplay(image, cmd)
-      .then(() => true)
-      .catch(() => false);
-  }
-
-  private async _decodeAndDisplay(image: IKittyImageData, cmd: IKittyCommand): Promise<void> {
-    let bitmap: ImageBitmap | undefined = await this._createBitmap(image);
-
-    try {
-      const cropX = Math.max(0, cmd.x ?? 0);
-      const cropY = Math.max(0, cmd.y ?? 0);
-      const cropW = cmd.sourceWidth || (bitmap.width - cropX);
-      const cropH = cmd.sourceHeight || (bitmap.height - cropY);
-
-      const maxCropW = Math.max(0, bitmap.width - cropX);
-      const maxCropH = Math.max(0, bitmap.height - cropY);
-      const finalCropW = Math.max(0, Math.min(cropW, maxCropW));
-      const finalCropH = Math.max(0, Math.min(cropH, maxCropH));
-
-      if (finalCropW === 0 || finalCropH === 0) {
-        throw new Error('invalid source rectangle');
-      }
-
-      if (cropX !== 0 || cropY !== 0 || finalCropW !== bitmap.width || finalCropH !== bitmap.height) {
-        const cropped = await createImageBitmap(bitmap, cropX, cropY, finalCropW, finalCropH);
-        bitmap.close();
-        bitmap = cropped;
-      }
-
-      const cw = this._renderer.dimensions?.css.cell.width || CELL_SIZE_DEFAULT.width;
-      const ch = this._renderer.dimensions?.css.cell.height || CELL_SIZE_DEFAULT.height;
-
-      // Per spec: c/r default to image's natural cell dimensions.
-      // If only one of c/r is specified, compute the other from image aspect ratio.
-      let imgCols: number;
-      let imgRows: number;
-      if (cmd.columns !== undefined && cmd.rows !== undefined) {
-        imgCols = cmd.columns;
-        imgRows = cmd.rows;
-      } else if (cmd.columns !== undefined) {
-        imgCols = cmd.columns;
-        imgRows = Math.max(1, Math.ceil((bitmap.height / bitmap.width) * (imgCols * cw) / ch));
-      } else if (cmd.rows !== undefined) {
-        imgRows = cmd.rows;
-        imgCols = Math.max(1, Math.ceil((bitmap.width / bitmap.height) * (imgRows * ch) / cw));
-      } else {
-        imgCols = Math.ceil(bitmap.width / cw);
-        imgRows = Math.ceil(bitmap.height / ch);
-      }
-
-      let w = bitmap.width;
-      let h = bitmap.height;
-
-      // Scale bitmap to fit placement rectangle when c/r are specified
-      if (cmd.columns !== undefined || cmd.rows !== undefined) {
-        w = Math.round(imgCols * cw);
-        h = Math.round(imgRows * ch);
-      }
-
-      if (w * h > this._opts.pixelLimit) {
-        throw new Error('image exceeds pixel limit');
-      }
-
-      // Save cursor position before addImage modifies it
-      const buffer = this._coreTerminal._core.buffer;
-      const savedX = buffer.x;
-      const savedY = buffer.y;
-      const savedYbase = buffer.ybase;
-
-      // Determine layer based on z-index: negative = behind text, 0+ = on top.
-      // When z<0 we always use the bottom layer even without allowTransparency —
-      // the image will simply be hidden behind the opaque text background, which
-      // is the correct behavior (client asked for "behind text").
-      const wantsBottom = cmd.zIndex !== undefined && cmd.zIndex < 0;
-      const layer: ImageLayer = wantsBottom ? 'bottom' : 'top';
-
-      if (w !== bitmap.width || h !== bitmap.height) {
-        const scaled = await createImageBitmap(bitmap, { resizeWidth: w, resizeHeight: h });
-        bitmap.close();
-        bitmap = scaled;
-      }
-
-      // Per spec: X/Y are pixel offsets within the first cell, so clamp to cell dimensions
-      const xOffset = Math.min(Math.max(0, cmd.xOffset ?? 0), cw - 1);
-      const yOffset = Math.min(Math.max(0, cmd.yOffset ?? 0), ch - 1);
-      if (xOffset !== 0 || yOffset !== 0) {
-        // Per spec: X/Y is not added to c/r area. When c/r are explicit, the
-        // total placement area remains c*cw × r*ch pixels and the offset image
-        // is clipped to fit. When c/r are unset, the padded canvas determines
-        // the natural cell dimensions.
-        const canvasW = (cmd.columns !== undefined) ? Math.round(imgCols * cw) : bitmap.width + xOffset;
-        const canvasH = (cmd.rows !== undefined) ? Math.round(imgRows * ch) : bitmap.height + yOffset;
-        const offsetCanvas = ImageRenderer.createCanvas(window.document, canvasW, canvasH);
-        const offsetCtx = offsetCanvas.getContext('2d');
-        if (!offsetCtx) {
-          throw new Error('Failed to create offset canvas context');
-        }
-        offsetCtx.drawImage(bitmap, xOffset, yOffset);
-
-        const offsetBitmap = await createImageBitmap(offsetCanvas);
-        offsetCanvas.width = offsetCanvas.height = 0;
-        bitmap.close();
-        bitmap = offsetBitmap;
-        w = bitmap.width;
-        h = bitmap.height;
-        if (w * h > this._opts.pixelLimit) {
-          throw new Error('image exceeds pixel limit');
-        }
-        if (cmd.columns === undefined) {
-          imgCols = Math.ceil(bitmap.width / cw);
-        }
-        if (cmd.rows === undefined) {
-          imgRows = Math.ceil(bitmap.height / ch);
-        }
-      }
-
-      const zIndex = cmd.zIndex ?? 0;
-      this._kittyStorage.addImage(image.id, bitmap, true, layer, zIndex);
-      bitmap = undefined;  // ownership transferred to storage
-
-      // Kitty cursor movement
-      // Per spec: cursor placed at first column after last image column,
-      // on the last row of the image. C=1 means don't move cursor.
-      if (cmd.cursorMovement === 1) {
-        // C=1: restore cursor to position before image was placed
-        const scrolled = buffer.ybase - savedYbase;
-        buffer.x = savedX;
-        // Can't restore cursor to scrollback?
-        buffer.y = Math.max(savedY - scrolled, 0);
-      } else {
-        // Default (C=0): advance cursor horizontally past the image
-        // addImage already positioned cursor on the last row via lineFeeds
-        buffer.x = Math.min(savedX + imgCols, this._coreTerminal.cols);
-      }
-    } catch (e) {
-      bitmap?.close();
-      throw e;
-    }
-  }
-
-  // Create ImageBitmap from already-decoded image data.
-  private async _createBitmap(image: IKittyImageData): Promise<ImageBitmap> {
-    let bytes: Uint8Array = new Uint8Array(await image.data.arrayBuffer());
-
-    if (image.compression === KittyCompression.ZLIB) {
-      bytes = await this._decompressZlib(bytes);
-    }
-
-    if (image.format === KittyFormat.PNG) {
-      const blob = new Blob([bytes as BlobPart], { type: 'image/png' });
-      if (!window.createImageBitmap) {
-        const url = URL.createObjectURL(blob);
-        const img = new Image();
-        return new Promise<ImageBitmap>((resolve, reject) => {
-          img.addEventListener('load', () => {
-            URL.revokeObjectURL(url);
-            const canvas = ImageRenderer.createCanvas(window.document, img.width, img.height);
-            canvas.getContext('2d')?.drawImage(img, 0, 0);
-            createImageBitmap(canvas).then(resolve).catch(reject);
-          });
-          img.addEventListener('error', () => {
-            URL.revokeObjectURL(url);
-            reject(new Error('Failed to load image'));
-          });
-          img.src = url;
-        });
-      }
-      return createImageBitmap(blob);
-    }
-
-    // Raw pixel data
-    const width = image.width;
-    const height = image.height;
-
-    if (!width || !height) {
-      throw new Error('Width and height required for raw pixel data');
-    }
-
-    const bytesPerPixel = image.format === KittyFormat.RGBA ? KittyPixelConstants.BYTES_PER_PIXEL_RGBA : KittyPixelConstants.BYTES_PER_PIXEL_RGB;
-    const expectedBytes = width * height * bytesPerPixel;
-
-    if (bytes.length < expectedBytes) {
-      throw new Error('Insufficient pixel data');
-    }
-
-    const pixelCount = width * height;
-
-    if (image.format === KittyFormat.RGBA) {
-      // RGBA: use bytes directly — no copy needed
-      return createImageBitmap(new ImageData(new Uint8ClampedArray(bytes.buffer as ArrayBuffer, bytes.byteOffset, pixelCount * KittyPixelConstants.BYTES_PER_PIXEL_RGBA), width, height));
-    }
-
-    // RGB→RGBA: interleave alpha using uint32 block processing (4 pixels per iteration).
-    // 3 uint32 reads + 4 uint32 writes per 4 pixels vs 28 byte reads/writes — ~6x faster.
-    // Assumes little-endian (all modern browsers/Node.js).
-    const data = new Uint8ClampedArray(pixelCount * KittyPixelConstants.BYTES_PER_PIXEL_RGBA);
-    const src32 = new Uint32Array(bytes.buffer, bytes.byteOffset, Math.floor(bytes.byteLength / 4));
-    const dst32 = new Uint32Array(data.buffer);
-    const alignedPixels = pixelCount & ~3;  // round down to multiple of 4
-
-    let srcOffset = 0;
-    let dstOffset = 0;
-    for (let i = 0; i < alignedPixels; i += 4) {
-      const b0 = src32[srcOffset++];
-      const b1 = src32[srcOffset++];
-      const b2 = src32[srcOffset++];
-      // Little-endian: pixel bytes are [R,G,B] → uint32 ABGR layout
-      dst32[dstOffset++] = 0xFF000000 | b0;
-      dst32[dstOffset++] = 0xFF000000 | (b0 >>> 24) | (b1 << 8);
-      dst32[dstOffset++] = 0xFF000000 | (b1 >>> 16) | (b2 << 16);
-      dst32[dstOffset++] = 0xFF000000 | (b2 >>> 8);
-    }
-
-    // Handle remaining 1–3 pixels
-    let srcByte = alignedPixels * KittyPixelConstants.BYTES_PER_PIXEL_RGB;
-    let dstByte = alignedPixels * KittyPixelConstants.BYTES_PER_PIXEL_RGBA;
-    for (let i = alignedPixels; i < pixelCount; i++) {
-      data[dstByte]     = bytes[srcByte];
-      data[dstByte + 1] = bytes[srcByte + 1];
-      data[dstByte + 2] = bytes[srcByte + 2];
-      data[dstByte + 3] = KittyPixelConstants.ALPHA_OPAQUE;
-      srcByte += KittyPixelConstants.BYTES_PER_PIXEL_RGB;
-      dstByte += KittyPixelConstants.BYTES_PER_PIXEL_RGBA;
-    }
-
-    return createImageBitmap(new ImageData(data, width, height));
-  }
-
-  private async _decompressZlib(compressed: Uint8Array): Promise<Uint8Array> {
-    try {
-      return await this._decompress(compressed, 'deflate');
-    } catch {
-      return await this._decompress(compressed, 'deflate-raw');
-    }
-  }
-
-  private async _decompress(compressed: Uint8Array, format: 'deflate' | 'deflate-raw'): Promise<Uint8Array> {
-    const ds = new DecompressionStream(format);
-    const writer = ds.writable.getWriter();
-    writer.write(compressed as BufferSource);
-    writer.close();
-
-    const chunks: Uint8Array[] = [];
-    const reader = ds.readable.getReader();
-
-    while (true) {
-      const { done, value } = await reader.read();
-      if (done) break;
-      chunks.push(value);
-    }
-
-    const totalLength = chunks.reduce((sum, chunk) => sum + chunk.length, 0);
-    const result = new Uint8Array(totalLength);
-    let offset = 0;
-    for (const chunk of chunks) {
-      result.set(chunk, offset);
-      offset += chunk.length;
-    }
-    return result;
-  }
-
-  public get images(): ReadonlyMap<number, IKittyImageData> {
-    return this._kittyStorage.images;
-  }
-
-  public get _kittyIdToStorageId(): ReadonlyMap<number, number> {
-    return this._kittyStorage.kittyIdToStorageId;
-  }
-
-  public get pendingTransmissions(): ReadonlyMap<number, IPendingTransmission> {
-    return this._pendingTransmissions;
-  }
-}

addons/addon-image/src/kitty/KittyGraphicsTypes.test.ts

@@ -1,149 +0,0 @@
-/**
- * Copyright (c) 2026 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-import { assert } from 'chai';
-import { parseKittyCommand, KittyAction, KittyFormat } from './KittyGraphicsTypes';
-
-describe('KittyGraphicsTypes', () => {
-  describe('parseKittyCommand', () => {
-    it('should parse control data with action and format', () => {
-      const cmd = parseKittyCommand('a=T,f=100');
-      assert.strictEqual(cmd.action, 'T');
-      assert.strictEqual(cmd.format, 100);
-    });
-
-    it('should parse control data with all options', () => {
-      const cmd = parseKittyCommand('a=t,f=32,i=5,s=10,v=20,c=3,r=2,m=1,q=2');
-      assert.strictEqual(cmd.action, 't');
-      assert.strictEqual(cmd.format, 32);
-      assert.strictEqual(cmd.id, 5);
-      assert.strictEqual(cmd.width, 10);
-      assert.strictEqual(cmd.height, 20);
-      assert.strictEqual(cmd.columns, 3);
-      assert.strictEqual(cmd.rows, 2);
-      assert.strictEqual(cmd.more, 1);
-      assert.strictEqual(cmd.quiet, 2);
-    });
-
-    it('should handle empty control data', () => {
-      const cmd = parseKittyCommand('');
-      assert.strictEqual(cmd.action, undefined);
-      assert.strictEqual(cmd.format, undefined);
-    });
-
-    it('should parse transmit action', () => {
-      const cmd = parseKittyCommand('a=t,f=100');
-      assert.strictEqual(cmd.action, KittyAction.TRANSMIT);
-      assert.strictEqual(cmd.format, KittyFormat.PNG);
-    });
-
-    it('should parse delete action', () => {
-      const cmd = parseKittyCommand('a=d,i=5');
-      assert.strictEqual(cmd.action, KittyAction.DELETE);
-      assert.strictEqual(cmd.id, 5);
-    });
-
-    it('should parse empty action as empty string', () => {
-      const cmd = parseKittyCommand('a=,f=100');
-      assert.strictEqual(cmd.action, '');
-      assert.strictEqual(cmd.format, 100);
-    });
-
-    it('should leave action undefined when key is not present', () => {
-      const cmd = parseKittyCommand('f=100,i=5');
-      assert.strictEqual(cmd.action, undefined);
-      assert.strictEqual(cmd.format, 100);
-      assert.strictEqual(cmd.id, 5);
-    });
-
-    it('should parse compression key', () => {
-      const cmd = parseKittyCommand('a=t,f=32,o=z');
-      assert.strictEqual(cmd.action, 't');
-      assert.strictEqual(cmd.format, 32);
-      assert.strictEqual(cmd.compression, 'z');
-    });
-
-    it('should parse cursor movement key', () => {
-      const cmd = parseKittyCommand('a=T,f=100,C=1');
-      assert.strictEqual(cmd.cursorMovement, 1);
-    });
-
-    it('should parse cursor movement key C=0', () => {
-      const cmd = parseKittyCommand('a=T,f=100,C=0');
-      assert.strictEqual(cmd.cursorMovement, 0);
-    });
-
-    it('should parse x and y offset', () => {
-      const cmd = parseKittyCommand('a=T,x=10,y=20');
-      assert.strictEqual(cmd.x, 10);
-      assert.strictEqual(cmd.y, 20);
-    });
-
-    it('should handle keys without values', () => {
-      const cmd = parseKittyCommand('a=t,f=,i=5');
-      assert.strictEqual(cmd.action, 't');
-      assert.ok(isNaN(cmd.format!));
-      assert.strictEqual(cmd.id, 5);
-    });
-
-    it('should parse z-index key with positive value', () => {
-      const cmd = parseKittyCommand('a=T,f=100,z=10');
-      assert.strictEqual(cmd.zIndex, 10);
-    });
-
-    it('should parse z-index key with zero', () => {
-      const cmd = parseKittyCommand('a=T,f=100,z=0');
-      assert.strictEqual(cmd.zIndex, 0);
-    });
-
-    it('should parse z-index key with negative value', () => {
-      const cmd = parseKittyCommand('a=T,f=100,z=-1');
-      assert.strictEqual(cmd.zIndex, -1);
-    });
-
-    it('should leave zIndex undefined when not specified', () => {
-      const cmd = parseKittyCommand('a=T,f=100');
-      assert.strictEqual(cmd.zIndex, undefined);
-    });
-
-    it('should parse delete selector key', () => {
-      const cmd = parseKittyCommand('a=d,d=i,i=5');
-      assert.strictEqual(cmd.action, 'd');
-      assert.strictEqual(cmd.deleteSelector, 'i');
-      assert.strictEqual(cmd.id, 5);
-    });
-
-    it('should parse uppercase delete selector', () => {
-      const cmd = parseKittyCommand('a=d,d=A');
-      assert.strictEqual(cmd.deleteSelector, 'A');
-    });
-
-    it('should parse delete selector d=a (all)', () => {
-      const cmd = parseKittyCommand('a=d,d=a');
-      assert.strictEqual(cmd.deleteSelector, 'a');
-    });
-
-    it('should leave deleteSelector undefined when not specified', () => {
-      const cmd = parseKittyCommand('a=d,i=5');
-      assert.strictEqual(cmd.deleteSelector, undefined);
-    });
-
-    it('should parse placement id key', () => {
-      const cmd = parseKittyCommand('a=d,d=i,i=5,p=3');
-      assert.strictEqual(cmd.placementId, 3);
-      assert.strictEqual(cmd.deleteSelector, 'i');
-      assert.strictEqual(cmd.id, 5);
-    });
-
-    it('should leave placementId undefined when not specified', () => {
-      const cmd = parseKittyCommand('a=d,d=i,i=5');
-      assert.strictEqual(cmd.placementId, undefined);
-    });
-
-    it('should parse image number key', () => {
-      const cmd = parseKittyCommand('a=t,f=100,I=42');
-      assert.strictEqual(cmd.imageNumber, 42);
-    });
-  });
-});

addons/addon-image/src/kitty/KittyGraphicsTypes.ts

@@ -1,195 +0,0 @@
-/**
- * Copyright (c) 2026 The xterm.js authors. All rights reserved.
- * @license MIT
- *
- * Kitty graphics protocol types, constants, and parsing utilities.
- */
-
-import type Base64Decoder from 'xterm-wasm-parts/lib/base64/Base64Decoder.wasm';
-
-// Kitty graphics protocol action types.
-// See: https://sw.kovidgoyal.net/kitty/graphics-protocol/#control-data-reference under key 'a'.
-export const enum KittyAction {
-  TRANSMIT = 't',
-  TRANSMIT_DISPLAY = 'T',
-  QUERY = 'q',
-  PLACEMENT = 'p',
-  DELETE = 'd'
-}
-
-// Kitty graphics protocol format types.
-// See: https://sw.kovidgoyal.net/kitty/graphics-protocol/#control-data-reference
-export const enum KittyFormat {
-  RGB = 24,
-  RGBA = 32,
-  PNG = 100
-}
-
-// Kitty graphics protocol compression types.
-// See: https://sw.kovidgoyal.net/kitty/graphics-protocol/#control-data-reference under key 'o'.
-export const enum KittyCompression {
-  NONE = '',
-  ZLIB = 'z'
-}
-
-// Kitty graphics protocol control data keys.
-// See: https://sw.kovidgoyal.net/kitty/graphics-protocol/#control-data-reference
-export const enum KittyKey {
-  // Action to perform (t=transmit, T=transmit+display, q=query, p=placement, d=delete)
-  ACTION = 'a',
-  // Image format (24=RGB, 32=RGBA, 100=PNG)
-  FORMAT = 'f',
-  // Image ID for referencing stored images
-  ID = 'i',
-  // Image number (alternative to ID, terminal assigns ID)
-  IMAGE_NUMBER = 'I',
-  // Source image width in pixels
-  WIDTH = 's',
-  // Source image height in pixels
-  HEIGHT = 'v',
-  // The left edge (in pixels) of the image area to display
-  X_OFFSET = 'x',
-  // The top edge (in pixels) of the image area to display
-  Y_OFFSET = 'y',
-  // Width (in pixels) of the source rectangle to display
-  SOURCE_WIDTH = 'w',
-  // Height (in pixels) of the source rectangle to display
-  SOURCE_HEIGHT = 'h',
-  // Horizontal offset (in pixels) within the first cell
-  X_PLACEMENT_OFFSET = 'X',
-  // Vertical offset (in pixels) within the first cell
-  Y_PLACEMENT_OFFSET = 'Y',
-  // Number of terminal columns to display the image over
-  COLUMNS = 'c',
-  // Number of terminal rows to display the image over
-  ROWS = 'r',
-  // More data flag (1=more chunks coming, 0=final chunk)
-  MORE = 'm',
-  // Compression type (z=zlib). This is essential for chunking larger images.
-  COMPRESSION = 'o',
-  // Quiet mode (1=suppress OK responses, 2=suppress error responses)
-  QUIET = 'q',
-  // Cursor movement policy (0=move cursor after image, 1=don't move cursor)
-  CURSOR_MOVEMENT = 'C',
-  // Z-index for image layering (negative = behind text, 0+ = on top)
-  Z_INDEX = 'z',
-  // Transmission medium (d=direct, f=file, t=temp file, s=shared memory)
-  TRANSMISSION = 't',
-  // Delete selector (a/A=all, i/I=by id, c/C=at cursor, etc.) — only used when a=d
-  DELETE_SELECTOR = 'd',
-  // Placement ID for targeting specific placements
-  PLACEMENT_ID = 'p'
-}
-
-// Pixel format constants
-export const enum KittyPixelConstants {
-  BYTES_PER_PIXEL_RGB = 3,
-  BYTES_PER_PIXEL_RGBA = 4,
-  ALPHA_OPAQUE = 255
-}
-
-// Parsed Kitty graphics command.
-export interface IKittyCommand {
-  action?: string;
-  format?: number;
-  id?: number;
-  imageNumber?: number;
-  width?: number;
-  height?: number;
-  x?: number;
-  y?: number;
-  sourceWidth?: number;
-  sourceHeight?: number;
-  xOffset?: number;
-  yOffset?: number;
-  columns?: number;
-  rows?: number;
-  more?: number;
-  quiet?: number;
-  cursorMovement?: number;
-  zIndex?: number;
-  transmission?: string;
-  deleteSelector?: string;
-  placementId?: number;
-  compression?: string;
-  payload?: string;
-}
-
-// Pending chunked transmission state.
-// Stores metadata from the first chunk while accumulating decoded payload data.
-export interface IPendingTransmission {
-  // The parsed command from the first chunk (contains action, format, dimensions, etc.)
-  cmd: IKittyCommand;
-  // Decoder used across chunked payloads
-  decoder: Base64Decoder;
-  // Total encoded (base64) bytes received across all chunks - for size limit enforcement
-  totalEncodedSize: number;
-  // Whether any chunk has failed to decode
-  decodeError: boolean;
-}
-
-// Stored Kitty image data.
-export interface IKittyImageData {
-  id: number;
-  // Decoded image data stored as Blob (off JS heap) to avoid 2GB heap limit
-  data: Blob;
-  width: number;
-  height: number;
-  format: 24 | 32 | 100;
-  compression?: string;
-}
-
-// Parses Kitty graphics control data into a command object.
-export function parseKittyCommand(data: string): IKittyCommand {
-  const cmd: IKittyCommand = {};
-  const parts = data.split(',');
-
-  for (const part of parts) {
-    const eqIdx = part.indexOf('=');
-    if (eqIdx === -1) continue;
-
-    const key = part.substring(0, eqIdx);
-    const value = part.substring(eqIdx + 1);
-
-    // Handle string keys first
-    if (key === KittyKey.ACTION) {
-      cmd.action = value;
-      continue;
-    }
-    if (key === KittyKey.COMPRESSION) {
-      cmd.compression = value;
-      continue;
-    }
-    if (key === KittyKey.TRANSMISSION) {
-      cmd.transmission = value;
-      continue;
-    }
-    if (key === KittyKey.DELETE_SELECTOR) {
-      cmd.deleteSelector = value;
-      continue;
-    }
-    const numValue = parseInt(value);
-    switch (key) {
-      case KittyKey.FORMAT: cmd.format = numValue; break;
-      case KittyKey.ID: cmd.id = numValue; break;
-      case KittyKey.IMAGE_NUMBER: cmd.imageNumber = numValue; break;
-      case KittyKey.WIDTH: cmd.width = numValue; break;
-      case KittyKey.HEIGHT: cmd.height = numValue; break;
-      case KittyKey.X_OFFSET: cmd.x = numValue; break;
-      case KittyKey.Y_OFFSET: cmd.y = numValue; break;
-      case KittyKey.SOURCE_WIDTH: cmd.sourceWidth = numValue; break;
-      case KittyKey.SOURCE_HEIGHT: cmd.sourceHeight = numValue; break;
-      case KittyKey.X_PLACEMENT_OFFSET: cmd.xOffset = numValue; break;
-      case KittyKey.Y_PLACEMENT_OFFSET: cmd.yOffset = numValue; break;
-      case KittyKey.COLUMNS: cmd.columns = numValue; break;
-      case KittyKey.ROWS: cmd.rows = numValue; break;
-      case KittyKey.MORE: cmd.more = numValue; break;
-      case KittyKey.QUIET: cmd.quiet = numValue; break;
-      case KittyKey.CURSOR_MOVEMENT: cmd.cursorMovement = numValue; break;
-      case KittyKey.Z_INDEX: cmd.zIndex = numValue; break;
-      case KittyKey.PLACEMENT_ID: cmd.placementId = numValue; break;
-    }
-  }
-
-  return cmd;
-}