| 1 | {"version":3,"file":"sourcemap-codec.es.js","sources":["../src/sourcemap-codec.ts"],"sourcesContent":["export type SourceMapSegment =\n\t| [number]\n\t| [number, number, number, number]\n\t| [number, number, number, number, number];\nexport type SourceMapLine = SourceMapSegment[];\nexport type SourceMapMappings = SourceMapLine[];\n\nconst charToInteger: { [charCode: number]: number } = {};\nconst chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';\n\nfor (let i = 0; i < chars.length; i++) {\n\tcharToInteger[chars.charCodeAt(i)] = i;\n}\n\nexport function decode(mappings: string): SourceMapMappings {\n\tconst decoded: SourceMapMappings = [];\n\tlet line: SourceMapLine = [];\n\tconst segment: SourceMapSegment = [\n\t\t0, // generated code column\n\t\t0, // source file index\n\t\t0, // source code line\n\t\t0, // source code column\n\t\t0, // name index\n\t];\n\n\tlet j = 0;\n\tfor (let i = 0, shift = 0, value = 0; i < mappings.length; i++) {\n\t\tconst c = mappings.charCodeAt(i);\n\n\t\tif (c === 44) { // \",\"\n\t\t\tsegmentify(line, segment, j);\n\t\t\tj = 0;\n\n\t\t} else if (c === 59) { // \";\"\n\t\t\tsegmentify(line, segment, j);\n\t\t\tj = 0;\n\t\t\tdecoded.push(line);\n\t\t\tline = [];\n\t\t\tsegment[0] = 0;\n\n\t\t} else {\n\t\t\tlet integer = charToInteger[c];\n\t\t\tif (integer === undefined) {\n\t\t\t\tthrow new Error('Invalid character (' + String.fromCharCode(c) + ')');\n\t\t\t}\n\n\t\t\tconst hasContinuationBit = integer & 32;\n\n\t\t\tinteger &= 31;\n\t\t\tvalue += integer << shift;\n\n\t\t\tif (hasContinuationBit) {\n\t\t\t\tshift += 5;\n\t\t\t} else {\n\t\t\t\tconst shouldNegate = value & 1;\n\t\t\t\tvalue >>>= 1;\n\n\t\t\t\tif (shouldNegate) {\n\t\t\t\t\tvalue = value === 0 ? -0x80000000 : -value;\n\t\t\t\t}\n\n\t\t\t\tsegment[j] += value;\n\t\t\t\tj++;\n\t\t\t\tvalue = shift = 0; // reset\n\t\t\t}\n\t\t}\n\t}\n\n\tsegmentify(line, segment, j);\n\tdecoded.push(line);\n\n\treturn decoded;\n}\n\nfunction segmentify(line: SourceMapSegment[], segment: SourceMapSegment, j: number) {\n\t// This looks ugly, but we're creating specialized arrays with a specific\n\t// length. This is much faster than creating a new array (which v8 expands to\n\t// a capacity of 17 after pushing the first item), or slicing out a subarray\n\t// (which is slow). Length 4 is assumed to be the most frequent, followed by\n\t// length 5 (since not everything will have an associated name), followed by\n\t// length 1 (it's probably rare for a source substring to not have an\n\t// associated segment data).\n\tif (j === 4) line.push([segment[0], segment[1], segment[2], segment[3]]);\n\telse if (j === 5) line.push([segment[0], segment[1], segment[2], segment[3], segment[4]]);\n\telse if (j === 1) line.push([segment[0]]);\n}\n\nexport function encode(decoded: SourceMapMappings): string {\n\tlet sourceFileIndex = 0; // second field\n\tlet sourceCodeLine = 0; // third field\n\tlet sourceCodeColumn = 0; // fourth field\n\tlet nameIndex = 0; // fifth field\n\tlet mappings = '';\n\n\tfor (let i = 0; i < decoded.length; i++) {\n\t\tconst line = decoded[i];\n\t\tif (i > 0) mappings += ';';\n\t\tif (line.length === 0) continue;\n\n\t\tlet generatedCodeColumn = 0; // first field\n\n\t\tconst lineMappings: string[] = [];\n\n\t\tfor (const segment of line) {\n\t\t\tlet segmentMappings = encodeInteger(segment[0] - generatedCodeColumn);\n\t\t\tgeneratedCodeColumn = segment[0];\n\n\t\t\tif (segment.length > 1) {\n\t\t\t\tsegmentMappings +=\n\t\t\t\t\tencodeInteger(segment[1] - sourceFileIndex) +\n\t\t\t\t\tencodeInteger(segment[2] - sourceCodeLine) +\n\t\t\t\t\tencodeInteger(segment[3] - sourceCodeColumn);\n\n\t\t\t\tsourceFileIndex = segment[1];\n\t\t\t\tsourceCodeLine = segment[2];\n\t\t\t\tsourceCodeColumn = segment[3];\n\t\t\t}\n\n\t\t\tif (segment.length === 5) {\n\t\t\t\tsegmentMappings += encodeInteger(segment[4] - nameIndex);\n\t\t\t\tnameIndex = segment[4];\n\t\t\t}\n\n\t\t\tlineMappings.push(segmentMappings);\n\t\t}\n\n\t\tmappings += lineMappings.join(',');\n\t}\n\n\treturn mappings;\n}\n\nfunction encodeInteger(num: number): string {\n\tvar result = '';\n\tnum = num < 0 ? (-num << 1) | 1 : num << 1;\n\tdo {\n\t\tvar clamped = num & 31;\n\t\tnum >>>= 5;\n\t\tif (num > 0) {\n\t\t\tclamped |= 32;\n\t\t}\n\t\tresult += chars[clamped];\n\t} while (num > 0);\n\n\treturn result;\n}\n"],"names":[],"mappings":"AAOA,IAAM,aAAa,GAAmC,EAAE,CAAC;AACzD,IAAM,KAAK,GAAG,mEAAmE,CAAC;AAElF,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,KAAK,CAAC,MAAM,EAAE,CAAC,EAAE,EAAE;IACtC,aAAa,CAAC,KAAK,CAAC,UAAU,CAAC,CAAC,CAAC,CAAC,GAAG,CAAC,CAAC;CACvC;AAED,SAAgB,MAAM,CAAC,QAAgB;IACtC,IAAM,OAAO,GAAsB,EAAE,CAAC;IACtC,IAAI,IAAI,GAAkB,EAAE,CAAC;IAC7B,IAAM,OAAO,GAAqB;QACjC,CAAC;QACD,CAAC;QACD,CAAC;QACD,CAAC;QACD,CAAC;KACD,CAAC;IAEF,IAAI,CAAC,GAAG,CAAC,CAAC;IACV,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,KAAK,GAAG,CAAC,EAAE,KAAK,GAAG,CAAC,EAAE,CAAC,GAAG,QAAQ,CAAC,MAAM,EAAE,CAAC,EAAE,EAAE;QAC/D,IAAM,CAAC,GAAG,QAAQ,CAAC,UAAU,CAAC,CAAC,CAAC,CAAC;QAEjC,IAAI,CAAC,KAAK,EAAE,EAAE;YACb,UAAU,CAAC,IAAI,EAAE,OAAO,EAAE,CAAC,CAAC,CAAC;YAC7B,CAAC,GAAG,CAAC,CAAC;SAEN;aAAM,IAAI,CAAC,KAAK,EAAE,EAAE;YACpB,UAAU,CAAC,IAAI,EAAE,OAAO,EAAE,CAAC,CAAC,CAAC;YAC7B,CAAC,GAAG,CAAC,CAAC;YACN,OAAO,CAAC,IAAI,CAAC,IAAI,CAAC,CAAC;YACnB,IAAI,GAAG,EAAE,CAAC;YACV,OAAO,CAAC,CAAC,CAAC,GAAG,CAAC,CAAC;SAEf;aAAM;YACN,IAAI,OAAO,GAAG,aAAa,CAAC,CAAC,CAAC,CAAC;YAC/B,IAAI,OAAO,KAAK,SAAS,EAAE;gBAC1B,MAAM,IAAI,KAAK,CAAC,qBAAqB,GAAG,MAAM,CAAC,YAAY,CAAC,CAAC,CAAC,GAAG,GAAG,CAAC,CAAC;aACtE;YAED,IAAM,kBAAkB,GAAG,OAAO,GAAG,EAAE,CAAC;YAExC,OAAO,IAAI,EAAE,CAAC;YACd,KAAK,IAAI,OAAO,IAAI,KAAK,CAAC;YAE1B,IAAI,kBAAkB,EAAE;gBACvB,KAAK,IAAI,CAAC,CAAC;aACX;iBAAM;gBACN,IAAM,YAAY,GAAG,KAAK,GAAG,CAAC,CAAC;gBAC/B,KAAK,MAAM,CAAC,CAAC;gBAEb,IAAI,YAAY,EAAE;oBACjB,KAAK,GAAG,KAAK,KAAK,CAAC,GAAG,CAAC,UAAU,GAAG,CAAC,KAAK,CAAC;iBAC3C;gBAED,OAAO,CAAC,CAAC,CAAC,IAAI,KAAK,CAAC;gBACpB,CAAC,EAAE,CAAC;gBACJ,KAAK,GAAG,KAAK,GAAG,CAAC,CAAC;aAClB;SACD;KACD;IAED,UAAU,CAAC,IAAI,EAAE,OAAO,EAAE,CAAC,CAAC,CAAC;IAC7B,OAAO,CAAC,IAAI,CAAC,IAAI,CAAC,CAAC;IAEnB,OAAO,OAAO,CAAC;CACf;AAED,SAAS,UAAU,CAAC,IAAwB,EAAE,OAAyB,EAAE,CAAS;;;;;;;;IAQjF,IAAI,CAAC,KAAK,CAAC;QAAE,IAAI,CAAC,IAAI,CAAC,CAAC,OAAO,CAAC,CAAC,CAAC,EAAE,OAAO,CAAC,CAAC,CAAC,EAAE,OAAO,CAAC,CAAC,CAAC,EAAE,OAAO,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC;SACpE,IAAI,CAAC,KAAK,CAAC;QAAE,IAAI,CAAC,IAAI,CAAC,CAAC,OAAO,CAAC,CAAC,CAAC,EAAE,OAAO,CAAC,CAAC,CAAC,EAAE,OAAO,CAAC,CAAC,CAAC,EAAE,OAAO,CAAC,CAAC,CAAC,EAAE,OAAO,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC;SACrF,IAAI,CAAC,KAAK,CAAC;QAAE,IAAI,CAAC,IAAI,CAAC,CAAC,OAAO,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC;CAC1C;AAED,SAAgB,MAAM,CAAC,OAA0B;IAChD,IAAI,eAAe,GAAG,CAAC,CAAC;IACxB,IAAI,cAAc,GAAG,CAAC,CAAC;IACvB,IAAI,gBAAgB,GAAG,CAAC,CAAC;IACzB,IAAI,SAAS,GAAG,CAAC,CAAC;IAClB,IAAI,QAAQ,GAAG,EAAE,CAAC;IAElB,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,OAAO,CAAC,MAAM,EAAE,CAAC,EAAE,EAAE;QACxC,IAAM,IAAI,GAAG,OAAO,CAAC,CAAC,CAAC,CAAC;QACxB,IAAI,CAAC,GAAG,CAAC;YAAE,QAAQ,IAAI,GAAG,CAAC;QAC3B,IAAI,IAAI,CAAC,MAAM,KAAK,CAAC;YAAE,SAAS;QAEhC,IAAI,mBAAmB,GAAG,CAAC,CAAC;QAE5B,IAAM,YAAY,GAAa,EAAE,CAAC;QAElC,KAAsB,UAAI,EAAJ,aAAI,EAAJ,kBAAI,EAAJ,IAAI,EAAE;YAAvB,IAAM,OAAO,aAAA;YACjB,IAAI,eAAe,GAAG,aAAa,CAAC,OAAO,CAAC,CAAC,CAAC,GAAG,mBAAmB,CAAC,CAAC;YACtE,mBAAmB,GAAG,OAAO,CAAC,CAAC,CAAC,CAAC;YAEjC,IAAI,OAAO,CAAC,MAAM,GAAG,CAAC,EAAE;gBACvB,eAAe;oBACd,aAAa,CAAC,OAAO,CAAC,CAAC,CAAC,GAAG,eAAe,CAAC;wBAC3C,aAAa,CAAC,OAAO,CAAC,CAAC,CAAC,GAAG,cAAc,CAAC;wBAC1C,aAAa,CAAC,OAAO,CAAC,CAAC,CAAC,GAAG,gBAAgB,CAAC,CAAC;gBAE9C,eAAe,GAAG,OAAO,CAAC,CAAC,CAAC,CAAC;gBAC7B,cAAc,GAAG,OAAO,CAAC,CAAC,CAAC,CAAC;gBAC5B,gBAAgB,GAAG,OAAO,CAAC,CAAC,CAAC,CAAC;aAC9B;YAED,IAAI,OAAO,CAAC,MAAM,KAAK,CAAC,EAAE;gBACzB,eAAe,IAAI,aAAa,CAAC,OAAO,CAAC,CAAC,CAAC,GAAG,SAAS,CAAC,CAAC;gBACzD,SAAS,GAAG,OAAO,CAAC,CAAC,CAAC,CAAC;aACvB;YAED,YAAY,CAAC,IAAI,CAAC,eAAe,CAAC,CAAC;SACnC;QAED,QAAQ,IAAI,YAAY,CAAC,IAAI,CAAC,GAAG,CAAC,CAAC;KACnC;IAED,OAAO,QAAQ,CAAC;CAChB;AAED,SAAS,aAAa,CAAC,GAAW;IACjC,IAAI,MAAM,GAAG,EAAE,CAAC;IAChB,GAAG,GAAG,GAAG,GAAG,CAAC,GAAG,CAAC,CAAC,GAAG,IAAI,CAAC,IAAI,CAAC,GAAG,GAAG,IAAI,CAAC,CAAC;IAC3C,GAAG;QACF,IAAI,OAAO,GAAG,GAAG,GAAG,EAAE,CAAC;QACvB,GAAG,MAAM,CAAC,CAAC;QACX,IAAI,GAAG,GAAG,CAAC,EAAE;YACZ,OAAO,IAAI,EAAE,CAAC;SACd;QACD,MAAM,IAAI,KAAK,CAAC,OAAO,CAAC,CAAC;KACzB,QAAQ,GAAG,GAAG,CAAC,EAAE;IAElB,OAAO,MAAM,CAAC;CACd;;;;"} |
|---|
