@wordpress/block-editor/build-module/utils/pasting.mjs.map

Generic block editor.

{
  "version": 3,
  "sources": ["../../src/utils/pasting.js"],
  "sourcesContent": ["/**\n * WordPress dependencies\n */\nimport { getFilesFromDataTransfer } from '@wordpress/dom';\n\n/**\n * Normalizes a given string of HTML to remove the Windows-specific \"Fragment\"\n * comments and any preceding and trailing content.\n *\n * @param {string} html the html to be normalized\n * @return {string} the normalized html\n */\nfunction removeWindowsFragments( html ) {\n\tconst startStr = '<!--StartFragment-->';\n\tconst startIdx = html.indexOf( startStr );\n\tif ( startIdx > -1 ) {\n\t\thtml = html.substring( startIdx + startStr.length );\n\t} else {\n\t\t// No point looking for EndFragment\n\t\treturn html;\n\t}\n\n\tconst endStr = '<!--EndFragment-->';\n\tconst endIdx = html.indexOf( endStr );\n\tif ( endIdx > -1 ) {\n\t\thtml = html.substring( 0, endIdx );\n\t}\n\n\treturn html;\n}\n\n/**\n * Removes the charset meta tag inserted by Chromium.\n * See:\n * - https://github.com/WordPress/gutenberg/issues/33585\n * - https://bugs.chromium.org/p/chromium/issues/detail?id=1264616#c4\n *\n * @param {string} html the html to be stripped of the meta tag.\n * @return {string} the cleaned html\n */\nfunction removeCharsetMetaTag( html ) {\n\tconst metaTag = `<meta charset='utf-8'>`;\n\n\tif ( html.startsWith( metaTag ) ) {\n\t\treturn html.slice( metaTag.length );\n\t}\n\n\treturn html;\n}\n\nexport function getPasteEventData( { clipboardData } ) {\n\tlet plainText = '';\n\tlet html = '';\n\n\ttry {\n\t\tplainText = clipboardData.getData( 'text/plain' );\n\t\thtml = clipboardData.getData( 'text/html' );\n\t} catch ( error ) {\n\t\t// Some browsers like UC Browser paste plain text by default and\n\t\t// don't support clipboardData at all, so allow default\n\t\t// behaviour.\n\t\treturn;\n\t}\n\n\t// Remove Windows-specific metadata appended within copied HTML text.\n\thtml = removeWindowsFragments( html );\n\n\t// Strip meta tag.\n\thtml = removeCharsetMetaTag( html );\n\n\tconst files = getFilesFromDataTransfer( clipboardData );\n\n\tif ( files.length && ! shouldDismissPastedFiles( files, html ) ) {\n\t\treturn { files };\n\t}\n\n\treturn { html, plainText, files: [] };\n}\n\n/**\n * Given a collection of DataTransfer files and HTML and plain text strings,\n * determine whether the files are to be dismissed in favor of the HTML.\n *\n * Certain office-type programs, like Microsoft Word or Apple Numbers,\n * will, upon copy, generate a screenshot of the content being copied and\n * attach it to the clipboard alongside the actual rich text that the user\n * sought to copy. In those cases, we should let Gutenberg handle the rich text\n * content and not the screenshot, since this allows Gutenberg to insert\n * meaningful blocks, like paragraphs, lists or even tables.\n *\n * @param {File[]} files File objects obtained from a paste event\n * @param {string} html  HTML content obtained from a paste event\n * @return {boolean}     True if the files should be dismissed\n */\nexport function shouldDismissPastedFiles( files, html /*, plainText */ ) {\n\t// The question is only relevant when there is actual HTML content and when\n\t// there is exactly one image file.\n\tif (\n\t\thtml &&\n\t\tfiles?.length === 1 &&\n\t\tfiles[ 0 ].type.indexOf( 'image/' ) === 0\n\t) {\n\t\t// A single <img> tag found in the HTML source suggests that the\n\t\t// content being pasted revolves around an image. Sometimes there are\n\t\t// other elements found, like <figure>, but we assume that the user's\n\t\t// intention is to paste the actual image file.\n\t\tconst IMAGE_TAG = /<\\s*img\\b/gi;\n\t\tif ( html.match( IMAGE_TAG )?.length !== 1 ) {\n\t\t\treturn true;\n\t\t}\n\n\t\t// Even when there is exactly one <img> tag in the HTML payload, we\n\t\t// choose to weed out local images, i.e. those whose source starts with\n\t\t// \"file://\". These payloads occur in specific configurations, such as\n\t\t// when copying an entire document from Microsoft Word, that contains\n\t\t// text and exactly one image, and pasting that content using Google\n\t\t// Chrome.\n\t\tconst IMG_WITH_LOCAL_SRC = /<\\s*img\\b[^>]*\\bsrc=\"file:\\/\\//i;\n\t\tif ( html.match( IMG_WITH_LOCAL_SRC ) ) {\n\t\t\treturn true;\n\t\t}\n\t}\n\n\treturn false;\n}\n"],
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}