/// <summary>
/// Gets a source mapping for the given filename. Line numbers are zero based.
/// </summary>
internal SourceMapInfo MapToOriginal(string filename, int line, int column = 0)
{
JavaScriptSourceMapInfo mapInfo = TryGetMapInfo(filename);
if (mapInfo != null)
{
SourceMapInfo mapping;
if (line < mapInfo.Lines.Length)
{
string lineText = mapInfo.Lines[line];
// map to the 1st non-whitespace character on the line
// This ensures we get the correct line number, mapping to column 0
// can give us the previous line.
if (!String.IsNullOrWhiteSpace(lineText))
{
for (; column < lineText.Length; column++)
{
if (!Char.IsWhiteSpace(lineText[column]))
{
break;
}
}
}
}
if (mapInfo.Map.TryMapPoint(line, column, out mapping))
{
return(mapping);
}
}
return(null);
}
/// <summary>
/// Given a filename finds the original filename
/// </summary>
/// <param name="filename">the mapped filename</param>
/// <returns>The original filename
/// null - if the file is not mapped
/// </returns>
internal string MapToOriginal(string filename)
{
JavaScriptSourceMapInfo mapInfo = TryGetMapInfo(filename);
if (mapInfo != null && mapInfo.Map != null && mapInfo.Map.Sources.Count > 0)
{
return(mapInfo.Map.Sources[0]);
}
return(null);
}
private JavaScriptSourceMapInfo TryGetMapInfo(string filename)
{
if (!this._originalFileToSourceMap.TryGetValue(filename, out var mapInfo))
{
if (File.Exists(filename))
{
var contents = File.ReadAllLines(filename);
const string marker = "# sourceMappingURL=";
int markerStart;
var markerLine = contents.Reverse().FirstOrDefault(x => x.IndexOf(marker, StringComparison.Ordinal) != -1);
if (markerLine != null && (markerStart = markerLine.IndexOf(marker, StringComparison.Ordinal)) != -1)
{
var sourceMapFilename = markerLine.Substring(markerStart + marker.Length).Trim();
try
{
if (!File.Exists(sourceMapFilename))
{
sourceMapFilename = Path.Combine(Path.GetDirectoryName(filename) ?? string.Empty, Path.GetFileName(sourceMapFilename));
}
if (File.Exists(sourceMapFilename))
{
using (var reader = new StreamReader(sourceMapFilename))
{
var sourceMap = new SourceMap(reader);
this._originalFileToSourceMap[filename] = mapInfo = new JavaScriptSourceMapInfo(sourceMap, contents);
// clear all of our cached _generatedFileToSourceMap files...
foreach (var cachedInvalid in this._generatedFileToSourceMap.Where(x => x.Value == null).Select(x => x.Key).ToArray())
{
this._generatedFileToSourceMap.Remove(cachedInvalid);
}
}
}
}
catch (ArgumentException)
{
}
catch (PathTooLongException)
{
}
catch (NotSupportedException)
{
}
catch (InvalidOperationException)
{
}
}
}
}
return(mapInfo);
}
private JavaScriptSourceMapInfo TryGetMapInfo(string filename) {
JavaScriptSourceMapInfo mapInfo;
if (!_originalFileToSourceMap.TryGetValue(filename, out mapInfo)) {
if (File.Exists(filename)) {
string[] contents = File.ReadAllLines(filename);
const string marker = "# sourceMappingURL=";
int markerStart;
string markerLine = contents.Reverse().FirstOrDefault(x => x.IndexOf(marker, StringComparison.Ordinal) != -1);
if (markerLine != null && (markerStart = markerLine.IndexOf(marker, StringComparison.Ordinal)) != -1) {
string sourceMapFilename = markerLine.Substring(markerStart + marker.Length).Trim();
try {
if (!File.Exists(sourceMapFilename)) {
sourceMapFilename = Path.Combine(Path.GetDirectoryName(filename) ?? string.Empty, Path.GetFileName(sourceMapFilename));
}
} catch (ArgumentException) {
} catch (PathTooLongException) {
}
try {
if (File.Exists(sourceMapFilename)) {
using (StreamReader reader = new StreamReader(sourceMapFilename)) {
var sourceMap = new SourceMap(reader);
_originalFileToSourceMap[filename] = mapInfo = new JavaScriptSourceMapInfo(sourceMap, contents);
// clear all of our cached _generatedFileToSourceMap files...
foreach (var cachedInvalid in _generatedFileToSourceMap.Where(x => x.Value == null).Select(x => x.Key).ToArray()) {
_generatedFileToSourceMap.Remove(cachedInvalid);
}
}
}
} catch (ArgumentException) {
} catch (PathTooLongException) {
} catch (NotSupportedException) {
} catch (InvalidOperationException) {
}
}
}
}
return mapInfo;
}
