/// <summary>
/// Applies the mappings of a sub source map to the current source map
/// Each mapping to the supplied source file is rewritten using the supplied source map
/// This is useful in situations where we have a to b to c, with mappings ba.map and cb.map
/// Calling cb.ApplySourceMap(ba) will return mappings from c to a (ca)
/// <param name="submap">The submap to apply</param>
/// <param name="sourceFile">The filename of the source file. If not specified, submap's File property will be used</param>
/// <returns>A new source map</returns>
/// </summary>
public SourceMap ApplySourceMap(SourceMap submap, string sourceFile = null)
{
if (submap == null)
{
throw new ArgumentNullException(nameof(submap));
}
if (sourceFile == null)
{
if (submap.File == null)
{
throw new Exception("ApplySourceMap expects either the explicit source file to the map, or submap's 'file' property");
}
sourceFile = submap.File;
}
SourceMap newSourceMap = new SourceMap
{
File = this.File,
Version = this.Version,
Sources = new List <string>(),
Names = new List <string>(),
SourcesContent = new List <string>(),
ParsedMappings = new List <MappingEntry>()
};
// transform mappings in this source map
foreach (MappingEntry mappingEntry in this.ParsedMappings)
{
MappingEntry newMappingEntry = mappingEntry.Clone();
if (mappingEntry.OriginalFileName == sourceFile && mappingEntry.OriginalSourcePosition != null)
{
MappingEntry correspondingSubMapMappingEntry = submap.GetMappingEntryForGeneratedSourcePosition(mappingEntry.OriginalSourcePosition);
if (correspondingSubMapMappingEntry != null)
{
// Copy the mapping
newMappingEntry = new MappingEntry
{
GeneratedSourcePosition = mappingEntry.GeneratedSourcePosition.Clone(),
OriginalSourcePosition = correspondingSubMapMappingEntry.OriginalSourcePosition.Clone(),
OriginalName = correspondingSubMapMappingEntry.OriginalName ?? mappingEntry.OriginalName,
OriginalFileName = correspondingSubMapMappingEntry.OriginalFileName ?? mappingEntry.OriginalFileName
};
}
}
// Copy into "Sources" and "Names"
string originalFileName = newMappingEntry.OriginalFileName;
string originalName = newMappingEntry.OriginalName;
if (originalFileName != null && !newSourceMap.Sources.Contains(originalFileName))
{
newSourceMap.Sources.Add(originalFileName);
}
if (originalName != null && !newSourceMap.Names.Contains(originalName))
{
newSourceMap.Names.Add(originalName);
}
newSourceMap.ParsedMappings.Add(newMappingEntry);
}
;
return(newSourceMap);
}
/// <summary>
/// Applies the mappings of a sub source map to the current source map
/// Each mapping to the supplied source file is rewritten using the supplied source map
/// This is useful in situations where we have a to b to c, with mappings ba.map and cb.map
/// Calling cb.ApplySourceMap(ba) will return mappings from c to a (ca)
/// <param name="submap">The submap to apply</param>
/// <param name="sourceFile">The filename of the source file. If not specified, submap's File property will be used</param>
/// <returns>A new source map</returns>
/// </summary>
public SourceMap ApplySourceMap(SourceMap submap, string sourceFile = null)
{
if (submap == null)
{
throw new ArgumentNullException(nameof(submap));
}
if (sourceFile == null)
{
if (submap.File == null)
{
throw new Exception($"{nameof(ApplySourceMap)} expects either the explicit source file to the map, or submap's 'file' property");
}
sourceFile = submap.File;
}
HashSet <string> sources = new HashSet <string>(StringComparer.Ordinal);
HashSet <string> names = new HashSet <string>(StringComparer.Ordinal);
List <MappingEntry> parsedMappings = new List <MappingEntry>(this.ParsedMappings.Count);
// transform mappings in this source map
foreach (MappingEntry mappingEntry in this.ParsedMappings)
{
MappingEntry newMappingEntry = mappingEntry;
if (mappingEntry.OriginalFileName == sourceFile && mappingEntry.OriginalSourcePosition != SourcePosition.NotFound)
{
MappingEntry?correspondingSubMapMappingEntry = submap.GetMappingEntryForGeneratedSourcePosition(mappingEntry.OriginalSourcePosition);
if (correspondingSubMapMappingEntry != null)
{
// Copy the mapping
newMappingEntry = new MappingEntry(
generatedSourcePosition: mappingEntry.GeneratedSourcePosition,
originalSourcePosition: correspondingSubMapMappingEntry.Value.OriginalSourcePosition,
originalName: correspondingSubMapMappingEntry.Value.OriginalName ?? mappingEntry.OriginalName,
originalFileName: correspondingSubMapMappingEntry.Value.OriginalFileName ?? mappingEntry.OriginalFileName);
}
}
// Copy into "Sources" and "Names"
string originalFileName = newMappingEntry.OriginalFileName;
string originalName = newMappingEntry.OriginalName;
if (originalFileName != null)
{
sources.Add(originalFileName);
}
if (originalName != null)
{
names.Add(originalName);
}
parsedMappings.Add(newMappingEntry);
}
SourceMap newSourceMap = new SourceMap(
version: Version,
file: File,
mappings: default,