@tldraw/editor/dist-esm/lib/exports/parseCss.mjs.map

tldraw infinite canvas SDK (editor).

{
  "version": 3,
  "sources": ["../../../src/lib/exports/parseCss.ts"],
  "sourcesContent": ["import { safeParseUrl } from '@tldraw/utils'\n\nexport interface ParsedFontFace {\n\tfontFace: string\n\turls: { original: string; resolved: string | null; embedded?: Promise<string | null> }[]\n\tfontFamilies: Set<string>\n}\n\n// parsing CSS with regular expressions doesn't really work. There are almost certainly edge cases\n// in the regular expressions we're using here. They're based formal grammars of CSS, but aren't\n// perfect. These were written with https://regexper.com/ - give it a go if you're editing these.\n\n// The regexes themselves would be nicer to work with if we were using named capturing groups\n// (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Regular_expressions/Named_capturing_group).\n// We use a lot of disjunctions (the `|`) to cover different syntaxes though, and at the time of\n// writing, browser support for using named capturing groups across disjunctions is rough.\n\n// Parse @import declarations:\n// https://developer.mozilla.org/en-US/docs/Web/CSS/@import#formal_syntax\nconst importsRegex =\n\t/@import\\s+(?:\"([^\"]+)\"|'([^']+)'|url\\s*\\(\\s*(?:\"([^\"]+)\"|'([^']+)'|([^'\")]+))\\s*\\))([^;]+);/gi\n\n// Locate @font-face declarations:\nconst fontFaceRegex = /@font-face\\s*{([^}]+)}/gi\n\n// Parse url() calls within a CSS value:\n// https://developer.mozilla.org/en-US/docs/Web/CSS/url#syntax\nconst urlsRegex = /url\\s*\\(\\s*(?:\"([^\"]+)\"|'([^']+)'|([^'\")]+))\\s*\\)/gi\n\n// Locate and parse the value of `font-family` within a @font-face declaration:\n// https://developer.mozilla.org/en-US/docs/Web/CSS/@font-face/font-family#formal_syntax\nconst fontFamilyRegex =\n\t/(?:^|;)\\s*font-family\\s*:\\s*(?:([^'\"][^;\\n]+)|\"([^\"]+)\"|'([^']+)')\\s*(?:;|$)/gi\n\nexport function parseCssImports(css: string) {\n\treturn Array.from(css.matchAll(importsRegex), (m) => ({\n\t\turl: m[1] || m[2] || m[3] || m[4] || m[5],\n\t\textras: m[6],\n\t}))\n}\n\nexport function parseCssFontFaces(css: string, baseUrl: string) {\n\treturn Array.from(css.matchAll(fontFaceRegex), (m): ParsedFontFace => {\n\t\tconst fontFace = m[1]\n\t\tconst urls = Array.from(fontFace.matchAll(urlsRegex), (m) => {\n\t\t\tconst original = m[1] || m[2] || m[3]\n\t\t\treturn {\n\t\t\t\toriginal,\n\t\t\t\tresolved: safeParseUrl(original, baseUrl)?.href ?? null,\n\t\t\t}\n\t\t})\n\t\tconst fontFamilies = new Set(\n\t\t\tArray.from(fontFace.matchAll(fontFamilyRegex), (m) => (m[1] || m[2] || m[3]).toLowerCase())\n\t\t)\n\n\t\treturn { fontFace, urls, fontFamilies }\n\t})\n}\n\nexport function parseCssFontFamilyValue(value: string) {\n\t// https://developer.mozilla.org/en-US/docs/Web/CSS/font-family#formal_syntax\n\t// we use two regexes here to parse each value in a comma separated list of font families\n\tconst valueRegex = /\\s*(?:([^'\"][^;\\n\\s,]+)|\"([^\"]+)\"|'([^']+)')\\s*/gi\n\tconst separatorRegex = /\\s*,\\s*/gi\n\n\tconst fontFamilies = new Set<string>()\n\n\twhile (true) {\n\t\tconst valueMatch = valueRegex.exec(value)\n\t\tif (!valueMatch) {\n\t\t\tbreak\n\t\t}\n\n\t\tconst fontFamily = valueMatch[1] || valueMatch[2] || valueMatch[3]\n\t\tfontFamilies.add(fontFamily.toLowerCase())\n\n\t\tseparatorRegex.lastIndex = valueRegex.lastIndex\n\t\tconst separatorMatch = separatorRegex.exec(value)\n\t\tif (!separatorMatch) {\n\t\t\tbreak\n\t\t}\n\n\t\tvalueRegex.lastIndex = separatorRegex.lastIndex\n\t}\n\n\treturn fontFamilies\n}\n\nexport function shouldIncludeCssProperty(property: string) {\n\tif (property.startsWith('-')) return false\n\tif (property.startsWith('animation')) return false\n\tif (property.startsWith('transition')) return false\n\tif (property === 'cursor') return false\n\tif (property === 'pointer-events') return false\n\tif (property === 'user-select') return false\n\tif (property === 'touch-action') return false\n\treturn true\n}\n\nexport function parseCss(css: string, baseUrl: string) {\n\treturn {\n\t\timports: parseCssImports(css),\n\t\tfontFaces: parseCssFontFaces(css, baseUrl),\n\t}\n}\n\nexport function parseCssValueUrls(value: string) {\n\treturn Array.from(value.matchAll(urlsRegex), (m) => ({\n\t\toriginal: m[0],\n\t\turl: m[1] || m[2] || m[3],\n\t}))\n}\n"],
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