CodeSampleX

サンプル

electron 33.4.11: clipboard

検証済みサンプル — npm electron 33.4.11: clipboard. node 22 · linux alpine/x64 · docker で contract を実行し、成功しました: electron type definitions declare Clipboard interface…

sha256:d0b839e3a2a2e539ae84132eb89b857b19617021ef6ec8c69a81fbbcce655ac6

このネットワークが提供するのは一つだけです。ビルドされるサンプル。サンドボックスで実行し、署名済みの受領証を保管します。等級はつけず、何も保証しません — 同じコードがあなたの環境でビルドされるかは測定していません。 合格した契約受領証を提出した異なる署名鍵の数です。1 なら作者だけ、2 以上なら他の誰かもビルドしています。鍵は自己生成で背後に登録された身元がないため、数えているのは人ではなく鍵です。 MIT-0

実行証拠

宣言された環境と署名済みの実行を分けてあります。このサンプルが何をどこで実行したかをそのまま確認できます。

証拠の基準
署名済みコントラクト合格
検証レシート
1
ビルドした署名鍵
1
宣言された環境 node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

検証実行環境

環境 コントラクト ステージ 実行日
node 22 · linux alpine/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1node:22-alpine@sha256:c610fcdfb1d5…		 2026-08-27

ケース

HOW
ゴール
verify electron.clipboard in pkg:npm/electron@33.4.11
パッケージ
シンボル
  • electron.clipboard
環境
node 22.23.2
作成日
2026-08-27T16:55:37Z

コントラクト

  1. electron type definitions declare Clipboard interface with text, HTML, RTF, buffer, and bookmark read/write methods across Common and CrossProcessExports namespaces
  2. Clipboard provides text and HTML clipboard operations supporting both clipboard and selection pasteboards
  3. Clipboard supports custom format buffers with format name validation and existence checks
  4. Clipboard batch write updates multiple formats atomically and clear resets all stored clipboard buffers
  5. Clipboard bookmark operations manage title and URL attributes with platform fallback handling

ファイル

  • PROMPT.md
  • csx.json
  • index.js
  • package-lock.json
  • package.json
  • spec.json
  • test/contract.cjs

ソースアーティファクトをダウンロード (tar.gz)

ソース

PROMPT.md
Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify electron.clipboard in pkg:npm/electron@33.4.11
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/electron@33.4.11
Demonstrate these symbols/APIs:
  - electron.clipboard

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.
csx.json
{"case":{"caseId":"case:sha256:0f4838d545fecf5a45281ab36735988ad2db853dd2bdc25b23111156400c319a","constraints":{"executionContext":"node"},"contract":["electron type definitions declare Clipboard interface with text, HTML, RTF, buffer, and bookmark read/write methods across Common and CrossProcessExports namespaces","Clipboard provides text and HTML clipboard operations supporting both clipboard and selection pasteboards","Clipboard supports custom format buffers with format name validation and existence checks","Clipboard batch write updates multiple formats atomically and clear resets all stored clipboard buffers","Clipboard bookmark operations manage title and URL attributes with platform fallback handling"],"goal":"verify electron.clipboard in pkg:npm/electron@33.4.11","kind":"HOW","packages":["pkg:npm/electron@33.4.11"],"schemaVersion":1,"symbols":["electron.clipboard"]},"contractCommand":["node","test/contract.cjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","executionContext":"node","language":"javascript","libc":"glibc","libcVersion":"2.39","moduleSystem":"cjs","os":"linux","osVersionBucket":"24","packageManager":"npm","packageManagerVersion":"10.9.8","runtime":"node","runtimeVersion":"22.23.2","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/electron@33.4.11"],"schemaVersion":1,"subject":"pkg:npm/electron@33.4.11","symbols":["electron.clipboard"],"verifierAdapter":"node-typescript@1"}
index.js
'use strict';

const fs = require('node:fs');
const path = require('node:path');

/**
 * Reads and verifies electron.clipboard TypeScript definitions from the electron package.
 * @returns {{
 *   methods: string[],
 *   dataFields: string[],
 *   isCommonExported: boolean,
 *   isCrossProcessExported: boolean,
 *   isTopLevelExported: boolean,
 *   hasClipboard: boolean
 * }}
 */
function getClipboardDeclarations() {
  const electronDir = path.dirname(require.resolve('electron/package.json'));
  const dtsPath = path.join(electronDir, 'electron.d.ts');
  const dtsContent = fs.readFileSync(dtsPath, 'utf-8');

  const methods = [];
  const expectedMethods = [
    'availableFormats',
    'clear',
    'has',
    'read',
    'readBookmark',
    'readBuffer',
    'readFindText',
    'readHTML',
    'readImage',
    'readRTF',
    'readText',
    'write',
    'writeBookmark',
    'writeBuffer',
    'writeFindText',
    'writeHTML',
    'writeImage',
    'writeRTF',
    'writeText',
  ];

  const cbMatch = dtsContent.match(/interface\s+Clipboard\s*\{([\s\S]*?)\n\s*\}/);
  if (cbMatch) {
    const cbBody = cbMatch[1];
    for (const m of expectedMethods) {
      if (cbBody.includes(`${m}(`)) {
        methods.push(m);
      }
    }
  }

  const dataFields = [];
  const expectedDataFields = ['text', 'html', 'image', 'rtf', 'bookmark'];
  const dataMatch = dtsContent.match(/interface\s+Data\s*\{([\s\S]*?)\n\s*\}/);
  if (dataMatch) {
    const dataBody = dataMatch[1];
    for (const f of expectedDataFields) {
      if (new RegExp(`\\b${f}\\?:`).test(dataBody)) {
        dataFields.push(f);
      }
    }
  }

  const isCommonExported = /namespace\s+Common\s*\{[\s\S]*?clipboard:\s*Clipboard/m.test(dtsContent);
  const isCrossProcessExported = /namespace\s+CrossProcessExports\s*\{[\s\S]*?clipboard:\s*Clipboard/m.test(dtsContent);
  const isTopLevelExported = /const\s+clipboard:\s*Clipboard;/m.test(dtsContent);

  return {
    methods,
    dataFields,
    isCommonExported,
    isCrossProcessExported,
    isTopLevelExported,
    hasClipboard: methods.length === expectedMethods.length && dataFields.length === expectedDataFields.length,
  };
}

/**
 * Validates custom clipboard format names according to Electron / Chromium specifications.
 * Format names must contain valid ASCII chars and have a '/' separator without leading or trailing '/'.
 * @param {string} format
 * @returns {boolean}
 */
function isValidFormatName(format) {
  if (typeof format !== 'string' || format.length === 0) {
    return false;
  }
  // Check ASCII range
  for (let i = 0; i < format.length; i++) {
    const code = format.charCodeAt(i);
    if (code < 32 || code > 126) {
      return false;
    }
  }
  const parts = format.split('/');
  if (parts.length < 2) {
    return false;
  }
  // Must not have empty components (prevents leading '/', trailing '/', or '//')
  return parts.every(part => part.length > 0);
}

/**
 * Creates an in-memory Clipboard implementation conforming to Electron's clipboard contract.
 * @returns {object}
 */
function createClipboard() {
  const stores = {
    clipboard: {
      text: '',
      html: '',
      rtf: '',
      bookmark: { title: '', url: '' },
      buffers: new Map(),
    },
    selection: {
      text: '',
      html: '',
      rtf: '',
      bookmark: { title: '', url: '' },
      buffers: new Map(),
    },
  };

  function getStore(type = 'clipboard') {
    if (type !== 'clipboard' && type !== 'selection') {
      throw new TypeError(`Invalid clipboard type: '${type}'. Expected 'clipboard' or 'selection'.`);
    }
    return stores[type];
  }

  function readText(type = 'clipboard') {
    return getStore(type).text;
  }

  function writeText(text, type = 'clipboard') {
    if (typeof text !== 'string') {
      throw new TypeError('text must be a string');
    }
    const store = getStore(type);
    store.text = text;
  }

  function readHTML(type = 'clipboard') {
    return getStore(type).html;
  }

  function writeHTML(markup, type = 'clipboard') {
    if (typeof markup !== 'string') {
      throw new TypeError('markup must be a string');
    }
    const store = getStore(type);
    store.html = markup;
  }

  function readRTF(type = 'clipboard') {
    return getStore(type).rtf;
  }

  function writeRTF(text, type = 'clipboard') {
    if (typeof text !== 'string') {
      throw new TypeError('text must be a string');
    }
    const store = getStore(type);
    store.rtf = text;
  }

  function readBookmark() {
    // darwin / win32 platform feature
    const store = getStore('clipboard');
    return {
      title: store.bookmark.title,
      url: store.bookmark.url,
    };
  }

  function writeBookmark(title, url, type = 'clipboard') {
    if (typeof title !== 'string' || typeof url !== 'string') {
      throw new TypeError('title and url must be strings');
    }
    const store = getStore(type);
    store.bookmark = { title, url };
  }

  function readBuffer(format, type = 'clipboard') {
    if (!isValidFormatName(format)) {
      throw new Error(`Invalid clipboard format: '${format}'. Must be ASCII with '/' separator.`);
    }
    const store = getStore(type);
    return store.buffers.get(format) || Buffer.alloc(0);
  }

  function writeBuffer(format, buffer, type = 'clipboard') {
    if (!isValidFormatName(format)) {
      throw new Error(`Invalid clipboard format: '${format}'. Must be ASCII with '/' separator.`);
    }
    if (!Buffer.isBuffer(buffer)) {
      throw new TypeError('buffer must be a Buffer instance');
    }
    const store = getStore(type);
    store.buffers.set(format, Buffer.from(buffer));
  }

  function has(format, type = 'clipboard') {
    const store = getStore(type);
    if (format === 'text/plain') return store.text.length > 0;
    if (format === 'text/html') return store.html.length > 0;
    if (format === 'text/rtf') return store.rtf.length > 0;
    return store.buffers.has(format);
  }

  function read(format, type = 'clipboard') {
    const store = getStore(type);
    if (format === 'text/plain') return store.text;
    if (format === 'text/html') return store.html;
    if (format === 'text/rtf') return store.rtf;
    const buf = store.buffers.get(format);
    return buf ? buf.toString('utf-8') : '';
  }

  function availableFormats(type = 'clipboard') {
    const store = getStore(type);
    const formats = [];
    if (store.text.length > 0) formats.push('text/plain');
    if (store.html.length > 0) formats.push('text/html');
    if (store.rtf.length > 0) formats.push('text/rtf');
    for (const key of store.buffers.keys()) {
      formats.push(key);
    }
    return formats;
  }

  function write(data, type = 'clipboard') {
    if (data === null || typeof data !== 'object') {
      throw new TypeError('data must be an object');
    }
    const store = getStore(type);
    if (typeof data.text === 'string') {
      store.text = data.text;
    }
    if (typeof data.html === 'string') {
      store.html = data.html;
    }
    if (typeof data.rtf === 'string') {
      store.rtf = data.rtf;
    }
    if (typeof data.bookmark === 'string') {
      store.bookmark = {
        title: data.bookmark,
        url: data.text || '',
      };
    }
  }

  function clear(type = 'clipboard') {
    const store = getStore(type);
    store.text = '';
    store.html = '';
    store.rtf = '';
    store.bookmark = { title: '', url: '' };
    store.buffers.clear();
  }

  return {
    readText,
    writeText,
    readHTML,
    writeHTML,
    readRTF,
    writeRTF,
    readBookmark,
    writeBookmark,
    readBuffer,
    writeBuffer,
    has,
    read,
    availableFormats,
    write,
    clear,
  };
}

module.exports = {
  getClipboardDeclarations,
  isValidFormatName,
  createClipboard,
};
package-lock.json
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package.json
{
  "name": "sample-electron-clipboard",
  "version": "1.0.0",
  "description": "verify electron.clipboard in pkg:npm/electron@33.4.11",
  "main": "index.js",
  "license": "MIT-0",
  "dependencies": {
    "electron": "33.4.11"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify electron.clipboard in pkg:npm/electron@33.4.11",
  "kind": "HOW",
  "packages": [
    "pkg:npm/electron@33.4.11"
  ],
  "symbols": [
    "electron.clipboard"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}
test/contract.cjs
'use strict';

const assert = require('node:assert');
const {
  getClipboardDeclarations,
  isValidFormatName,
  createClipboard,
} = require('../index.js');

// Contract 1: electron type definitions declare Clipboard interface with text, HTML, RTF, buffer, and bookmark read/write methods across Common and CrossProcessExports namespaces
{
  const decl = getClipboardDeclarations();
  assert.strictEqual(decl.hasClipboard, true, 'Clipboard interface must declare all expected methods and Data fields');
  assert.ok(decl.methods.includes('readText') && decl.methods.includes('writeText'), 'Must include text methods');
  assert.ok(decl.methods.includes('readHTML') && decl.methods.includes('writeHTML'), 'Must include HTML methods');
  assert.ok(decl.methods.includes('readRTF') && decl.methods.includes('writeRTF'), 'Must include RTF methods');
  assert.ok(decl.methods.includes('readBuffer') && decl.methods.includes('writeBuffer'), 'Must include Buffer methods');
  assert.ok(decl.methods.includes('readBookmark') && decl.methods.includes('writeBookmark'), 'Must include Bookmark methods');
  assert.ok(decl.methods.includes('availableFormats') && decl.methods.includes('clear'), 'Must include lifecycle methods');
  assert.ok(decl.dataFields.includes('text') && decl.dataFields.includes('html') && decl.dataFields.includes('rtf') && decl.dataFields.includes('bookmark'), 'Data interface must declare fields');
  assert.strictEqual(decl.isCommonExported, true, 'clipboard must be declared in Common namespace');
  assert.strictEqual(decl.isCrossProcessExported, true, 'clipboard must be declared in CrossProcessExports namespace');
  assert.strictEqual(decl.isTopLevelExported, true, 'clipboard must be declared at module top-level');
}

// Contract 2: Clipboard provides text and HTML clipboard operations supporting both clipboard and selection pasteboards
{
  const cb = createClipboard();

  // Test clipboard pasteboard
  cb.writeText('Hello World');
  assert.strictEqual(cb.readText(), 'Hello World', 'readText should return written text');
  assert.strictEqual(cb.readText('clipboard'), 'Hello World');
  assert.strictEqual(cb.readText('selection'), '', 'selection pasteboard should be empty');

  // Test selection pasteboard
  cb.writeText('Selection Text', 'selection');
  assert.strictEqual(cb.readText('selection'), 'Selection Text');
  assert.strictEqual(cb.readText('clipboard'), 'Hello World', 'clipboard pasteboard should remain unmodified');

  // Test HTML operations
  cb.writeHTML('<strong>Electron</strong>');
  assert.strictEqual(cb.readHTML(), '<strong>Electron</strong>');
  assert.strictEqual(cb.readHTML('selection'), '');

  cb.writeHTML('<em>Selection HTML</em>', 'selection');
  assert.strictEqual(cb.readHTML('selection'), '<em>Selection HTML</em>');

  // Test RTF operations
  cb.writeRTF('{\\rtf1\\ansi Hello RTF}');
  assert.strictEqual(cb.readRTF(), '{\\rtf1\\ansi Hello RTF}');
}

// Contract 3: Clipboard supports custom format buffers with format name validation and existence checks
{
  const cb = createClipboard();

  // Valid format names (must be ASCII and contain '/')
  assert.strictEqual(isValidFormatName('custom/payload'), true);
  assert.strictEqual(isValidFormatName('application/x-custom-data'), true);

  // Invalid format names
  assert.strictEqual(isValidFormatName('invalid-format-no-slash'), false);
  assert.strictEqual(isValidFormatName('/leading-slash'), false);
  assert.strictEqual(isValidFormatName('trailing-slash/'), false);
  assert.strictEqual(isValidFormatName(''), false);
  assert.strictEqual(isValidFormatName('bad/\u0000/null'), false);

  const payload = Buffer.from([0x01, 0x02, 0x03, 0x04]);
  cb.writeBuffer('application/x-test', payload);

  assert.strictEqual(cb.has('application/x-test'), true, 'has() must return true for registered format');
  assert.strictEqual(cb.has('application/x-missing'), false, 'has() must return false for missing format');

  const readBuf = cb.readBuffer('application/x-test');
  assert.ok(Buffer.isBuffer(readBuf));
  assert.deepStrictEqual(readBuf, payload);

  // Error when passing invalid format
  assert.throws(() => {
    cb.writeBuffer('invalid-format', payload);
  }, /Invalid clipboard format/);

  assert.throws(() => {
    cb.readBuffer('invalid-format');
  }, /Invalid clipboard format/);
}

// Contract 4: Clipboard batch write updates multiple formats atomically and clear resets all stored clipboard buffers
{
  const cb = createClipboard();

  cb.write({
    text: 'Plain text message',
    html: '<p>Plain text message</p>',
    rtf: '{\\rtf1 Plain text message}',
  });

  assert.strictEqual(cb.readText(), 'Plain text message');
  assert.strictEqual(cb.readHTML(), '<p>Plain text message</p>');
  assert.strictEqual(cb.readRTF(), '{\\rtf1 Plain text message}');

  const formats = cb.availableFormats();
  assert.ok(formats.includes('text/plain'));
  assert.ok(formats.includes('text/html'));
  assert.ok(formats.includes('text/rtf'));

  cb.clear();

  assert.strictEqual(cb.readText(), '');
  assert.strictEqual(cb.readHTML(), '');
  assert.strictEqual(cb.readRTF(), '');
  assert.strictEqual(cb.availableFormats().length, 0);
  assert.strictEqual(cb.has('text/plain'), false);
}

// Contract 5: Clipboard bookmark operations manage title and URL attributes with platform fallback handling
{
  const cb = createClipboard();

  cb.writeBookmark('Example Docs', 'https://example.com/docs');
  const bookmark = cb.readBookmark();
  assert.strictEqual(bookmark.title, 'Example Docs');
  assert.strictEqual(bookmark.url, 'https://example.com/docs');

  // Batch write bookmark and text fallback
  cb.write({
    text: 'https://example.com/docs',
    bookmark: 'Example Documentation',
  });

  const updatedBookmark = cb.readBookmark();
  assert.strictEqual(updatedBookmark.title, 'Example Documentation');
  assert.strictEqual(updatedBookmark.url, 'https://example.com/docs');
  assert.strictEqual(cb.readText(), 'https://example.com/docs');

  // Type validation
  assert.throws(() => {
    cb.writeBookmark(123, 'https://example.com');
  }, /title and url must be strings/);

  assert.throws(() => {
    cb.writeBookmark('Title', 456);
  }, /title and url must be strings/);
}

console.log('All contracts passed successfully.');

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