{"version":3,"file":"syntax-highlight.d.ts","sourceRoot":"","sources":["../../src/utils/syntax-highlight.ts"],"names":[],"mappings":"AAGA,MAAM,MAAM,kBAAkB,GAAG,CAAC,IAAI,EAAE,MAAM,KAAK,MAAM,CAAC;AAC1D,MAAM,MAAM,cAAc,GAAG,OAAO,CAAC,MAAM,CAAC,MAAM,EAAE,kBAAkB,CAAC,CAAC,CAAC;AAEzE,MAAM,WAAW,gBAAgB;IAChC,QAAQ,CAAC,EAAE,MAAM,CAAC;IAClB,cAAc,CAAC,EAAE,OAAO,CAAC;IACzB,cAAc,CAAC,EAAE,MAAM,EAAE,CAAC;IAC1B,KAAK,CAAC,EAAE,cAAc,CAAC;CACvB;AAoED,wBAAgB,qBAAqB,CAAC,IAAI,EAAE,MAAM,EAAE,KAAK,GAAE,cAAmB,GAAG,MAAM,CAoDtF;AAED,wBAAgB,SAAS,CAAC,IAAI,EAAE,MAAM,EAAE,OAAO,GAAE,gBAAqB,GAAG,MAAM,CAQ9E;AAED,wBAAgB,gBAAgB,CAAC,IAAI,EAAE,MAAM,GAAG,OAAO,CAEtD","sourcesContent":["import hljs from \"highlight.js/lib/index.js\";\nimport { decodeHtmlEntityAt } from \"./html.ts\";\n\nexport type HighlightFormatter = (text: string) => string;\nexport type HighlightTheme = Partial<Record<string, HighlightFormatter>>;\n\nexport interface HighlightOptions {\n\tlanguage?: string;\n\tignoreIllegals?: boolean;\n\tlanguageSubset?: string[];\n\ttheme?: HighlightTheme;\n}\n\nconst SPAN_CLOSE = \"</span>\";\nconst HIGHLIGHT_CLASS_PREFIX = \"hljs-\";\n\nfunction getScopeFromSpanTag(tag: string): string | undefined {\n\tconst match = /\\sclass\\s*=\\s*(?:\"([^\"]*)\"|'([^']*)')/.exec(tag);\n\tconst classValue = match?.[1] ?? match?.[2];\n\tif (!classValue) {\n\t\treturn undefined;\n\t}\n\n\tfor (const className of classValue.split(/\\s+/)) {\n\t\tif (className.startsWith(HIGHLIGHT_CLASS_PREFIX)) {\n\t\t\treturn className.slice(HIGHLIGHT_CLASS_PREFIX.length);\n\t\t}\n\t}\n\n\treturn undefined;\n}\n\nfunction getScopeFormatter(scope: string, theme: HighlightTheme): HighlightFormatter | undefined {\n\tconst exact = theme[scope];\n\tif (exact) {\n\t\treturn exact;\n\t}\n\n\tconst dotIndex = scope.indexOf(\".\");\n\tif (dotIndex !== -1) {\n\t\tconst prefixFormatter = theme[scope.slice(0, dotIndex)];\n\t\tif (prefixFormatter) {\n\t\t\treturn prefixFormatter;\n\t\t}\n\t}\n\n\tconst dashIndex = scope.indexOf(\"-\");\n\tif (dashIndex !== -1) {\n\t\tconst prefixFormatter = theme[scope.slice(0, dashIndex)];\n\t\tif (prefixFormatter) {\n\t\t\treturn prefixFormatter;\n\t\t}\n\t}\n\n\treturn undefined;\n}\n\nfunction getActiveFormatter(scopes: Array<string | undefined>, theme: HighlightTheme): HighlightFormatter | undefined {\n\tfor (let i = scopes.length - 1; i >= 0; i--) {\n\t\tconst scope = scopes[i];\n\t\tif (!scope) {\n\t\t\tcontinue;\n\t\t}\n\t\tconst formatter = getScopeFormatter(scope, theme);\n\t\tif (formatter) {\n\t\t\treturn formatter;\n\t\t}\n\t}\n\treturn theme.default;\n}\n\nfunction isSpanOpenTagStart(html: string, index: number): boolean {\n\tif (!html.startsWith(\"<span\", index)) {\n\t\treturn false;\n\t}\n\tconst nextChar = html[index + \"<span\".length];\n\treturn nextChar === \">\" || nextChar === \" \" || nextChar === \"\\t\" || nextChar === \"\\n\" || nextChar === \"\\r\";\n}\n\nexport function renderHighlightedHtml(html: string, theme: HighlightTheme = {}): string {\n\tlet output = \"\";\n\tlet textBuffer = \"\";\n\tconst scopes: Array<string | undefined> = [];\n\n\tconst flushText = () => {\n\t\tif (!textBuffer) {\n\t\t\treturn;\n\t\t}\n\t\tconst formatter = getActiveFormatter(scopes, theme);\n\t\toutput += formatter ? formatter(textBuffer) : textBuffer;\n\t\ttextBuffer = \"\";\n\t};\n\n\tlet index = 0;\n\twhile (index < html.length) {\n\t\tif (isSpanOpenTagStart(html, index)) {\n\t\t\tconst tagEndIndex = html.indexOf(\">\", index + 5);\n\t\t\tif (tagEndIndex !== -1) {\n\t\t\t\tflushText();\n\t\t\t\tconst tag = html.slice(index, tagEndIndex + 1);\n\t\t\t\tconst scope = getScopeFromSpanTag(tag);\n\t\t\t\tscopes.push(scope);\n\t\t\t\tindex = tagEndIndex + 1;\n\t\t\t\tcontinue;\n\t\t\t}\n\t\t}\n\n\t\tif (html.startsWith(SPAN_CLOSE, index)) {\n\t\t\tflushText();\n\t\t\tif (scopes.length > 0) {\n\t\t\t\tscopes.pop();\n\t\t\t}\n\t\t\tindex += SPAN_CLOSE.length;\n\t\t\tcontinue;\n\t\t}\n\n\t\tif (html[index] === \"&\") {\n\t\t\tconst decoded = decodeHtmlEntityAt(html, index);\n\t\t\tif (decoded) {\n\t\t\t\ttextBuffer += decoded.text;\n\t\t\t\tindex += decoded.length;\n\t\t\t\tcontinue;\n\t\t\t}\n\t\t}\n\n\t\ttextBuffer += html[index];\n\t\tindex++;\n\t}\n\n\tflushText();\n\treturn output;\n}\n\nexport function highlight(code: string, options: HighlightOptions = {}): string {\n\tconst html = options.language\n\t\t? hljs.highlight(code, {\n\t\t\t\tlanguage: options.language,\n\t\t\t\tignoreIllegals: options.ignoreIllegals,\n\t\t\t}).value\n\t\t: hljs.highlightAuto(code, options.languageSubset).value;\n\treturn renderHighlightedHtml(html, options.theme);\n}\n\nexport function supportsLanguage(name: string): boolean {\n\treturn hljs.getLanguage(name) !== undefined;\n}\n"]}