/// <summary>
/// Maps a location in the generated code into a location in the source code.
/// </summary>
internal bool TryMapPoint(int lineNo, int columnNo, out SourceMapInfo res)
{
if (lineNo < this._lines.Length)
{
var line = this._lines[lineNo];
for (var i = line.Segments.Length - 1; i >= 0; i--)
{
if (line.Segments[i].GeneratedColumn <= columnNo)
{
// we map to this column
res = new SourceMapInfo(
line.Segments[i].OriginalLine,
line.Segments[i].OriginalColumn,
line.Segments[i].SourceIndex < this.Sources.Count ? this.Sources[line.Segments[i].SourceIndex] : null,
line.Segments[i].OriginalName < this.Names.Count ? this.Names[line.Segments[i].OriginalName] : null
);
return(true);
}
}
if (line.Segments.Length > 0)
{
// we map to this column
res = new SourceMapInfo(
line.Segments[0].OriginalLine,
line.Segments[0].OriginalColumn,
line.Segments[0].SourceIndex < this.Sources.Count ? this.Sources[line.Segments[0].SourceIndex] : null,
line.Segments[0].OriginalName < this.Names.Count ? this.Names[line.Segments[0].OriginalName] : null
);
return(true);
}
}
res = default(SourceMapInfo);
return(false);
}
/// <summary>
/// Maps a location in the source code into the generated code.
/// </summary>
internal bool TryMapPointBack(int lineNo, int columnNo, out SourceMapInfo res)
{
int?firstBestLine = null, secondBestLine = null;
for (var i = 0; i < this._lines.Length; i++)
{
var line = this._lines[i];
int?originalColumn = null;
foreach (var segment in line.Segments)
{
if (segment.OriginalLine == lineNo)
{
if (segment.OriginalColumn <= columnNo)
{
originalColumn = segment.OriginalColumn;
}
else if (originalColumn != null)
{
res = new SourceMapInfo(
i,
columnNo - originalColumn.Value,
this.File,
null
);
return(true);
}
else
{
// code like:
// constructor(public greeting: string) { }
// gets compiled into:
// function Greeter(greeting) {
// this.greeting = greeting;
// }
// If we're going to pick a line out of here we'd rather pick the
// 2nd line where we're going to hit a breakpoint.
if (firstBestLine == null)
{
firstBestLine = i;
}
else if (secondBestLine == null && firstBestLine.Value != i)
{
secondBestLine = i;
}
}
}
else if (segment.OriginalLine > lineNo && firstBestLine != null)
{
// not a perfect matching on column (e.g. requested 0, mapping starts at 4)
res = new SourceMapInfo(secondBestLine ?? firstBestLine.Value, 0, this.File, null);
return(true);
}
}
}
res = default(SourceMapInfo);
return(false);
}
/// <summary>
/// Get the original file name to map to.
/// </summary>
/// <param name="javaScriptFileName">JavaScript compiled file.</param>
/// <param name="line">Line number</param>
/// <param name="column">Column number</param>
internal string GetOriginalFileName(string javaScriptFileName, int?line, int?column)
{
string originalFileName = null;
if (line != null && column != null)
{
SourceMapInfo tempMapping = this.MapToOriginal(javaScriptFileName, (int)line, (int)column);
if (tempMapping != null)
{
originalFileName = tempMapping.FileName;
}
}
return(originalFileName ?? this.MapToOriginal(javaScriptFileName));
}
/// <summary>
/// Maps a location in the generated code into a location in the source code.
/// </summary>
internal bool TryMapLine(int lineNo, out SourceMapInfo res)
{
if (lineNo < this._lines.Length)
{
var line = this._lines[lineNo];
if (line.Segments.Length > 0)
{
res = new SourceMapInfo(
line.Segments[0].OriginalLine,
0,
this.Sources[line.Segments[0].SourceIndex],
line.Segments[0].OriginalName < this.Names.Count ?
this.Names[line.Segments[0].OriginalName] :
null
);
return(true);
}
}
res = default(SourceMapInfo);
return(false);
}
