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Merge pull request #710 from Microsoft/JSONInEmitter

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Add explict serialization logic for source maps to avoid using JSON
This commit is contained in:
Mohamed Hegazy 2014-09-22 12:47:48 -07:00
commit 7e6bb85be4
1 changed files with 45 additions and 8 deletions
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53
src/compiler/emitter.ts
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@ -588,17 +588,54 @@ module ts {
recordSourceMapSpan(comment.end);
}
var escapedCharsRegExp = /[\t\v\f\b\0\r\n\"\u2028\u2029\u0085]/g;
var escapedCharsMap: Map<string> = {
"\t": "\\t",
"\v": "\\v",
"\f": "\\f",
"\b": "\\b",
"\0": "\\0",
"\r": "\\r",
"\n": "\\n",
"\"": "\\\"",
"\u2028": "\\u2028", // lineSeparator
"\u2029": "\\u2029", // paragraphSeparator
"\u0085": "\\u0085" // nextLine
};
function serializeSourceMapContents(version: number, file: string, sourceRoot: string, sources: string[], names: string[], mappings: string) {
return "{\"version\":" + version + ",\"file\":\"" + escapeString(file) + "\",\"sourceRoot\":\"" + escapeString(sourceRoot) + "\",\"sources\":[" + serializeStringArray(sources) + "],\"names\":[" + serializeStringArray(names) + "],\"mappings\":\"" + escapeString(mappings) + "\"}";
/** This does not support the full escape characters, it only supports the subset that can be used in file names
* or string literals. If the information encoded in the map changes, this needs to be revisited. */
function escapeString(s: string): string {
return escapedCharsRegExp.test(s) ? s.replace(escapedCharsRegExp, c => {
return escapedCharsMap[c] || c;
}) : s;
}
function serializeStringArray(list: string[]): string {
var output = "";
for (var i = 0, n = list.length; i < n; i++) {
if (i) {
output += ",";
}
output += "\"" + escapeString(list[i]) + "\"";
}
return output;
}
}
function writeJavaScriptAndSourceMapFile(emitOutput: string, writeByteOrderMark: boolean) {
// Write source map file
encodeLastRecordedSourceMapSpan();
writeFile(sourceMapData.sourceMapFilePath, JSON.stringify({
version: 3,
file: sourceMapData.sourceMapFile,
sourceRoot: sourceMapData.sourceMapSourceRoot,
sources: sourceMapData.sourceMapSources,
names: sourceMapData.sourceMapNames,
mappings: sourceMapData.sourceMapMappings
}), /*writeByteOrderMark*/ false);
writeFile(sourceMapData.sourceMapFilePath, serializeSourceMapContents(
3,
sourceMapData.sourceMapFile,
sourceMapData.sourceMapSourceRoot,
sourceMapData.sourceMapSources,
sourceMapData.sourceMapNames,
sourceMapData.sourceMapMappings), /*writeByteOrderMark*/ false);
sourceMapDataList.push(sourceMapData);
// Write sourcemap url to the js file and write the js file