public void Build()
{
var entries = new List <Entry>();
var temp = new List <int>(MAX_ENTRY_VALUES);
for (var i = 0; i < _lineMap.Length;)
{
switch (_lineMap[i])
{
case ',':
// ',' denotes a new entry on the same _line, just consume it
i++;
break;
case ';':
// ';' denotes a new _line.
// The _line is complete, store the result
CompleteLine(entries);
i++; // consume token
break;
default:
// grab the next entry for the current _line.
for (; i < _lineMap.Length && _lineMap[i] != ';' && _lineMap[i] != ','; i++)
{
i = Base64VLQ.VLQDecode(_lineMap, i, temp);
}
var entry = DecodeEntry(temp);
ValidateEntry(entry);
entries.Add(entry);
break;
}
}
// Some source map generator (e.g.UglifyJS) generates _lines without
// a trailing _line separator. So add the rest of the content.
if (entries.Any())
{
CompleteLine(entries);
}
}
private string SerializeMappings(out int lineCount)
{
var mappingsBuilder = new StringBuilder();
// The destination.
var previousLine = UNMAPPED;
var previousColumn = UNMAPPED;
// Previous values used for storing relative ids.
var previousSourceFileId = 0;
var previousSourceLine = 0;
var previousSourceColumn = 0;
var previousNameId = 0;
lineCount = LineCount ?? (Mappings(sort: false).Max(x => x.Generated?.Line ?? 0) + 1);
foreach (var m in Mappings(sort: true))
{
var current = m.Generated;
if (previousLine != current.Line)
{
previousColumn = 0;
}
if (current.Line != previousLine || current.Column != previousColumn)
{
for (var i = Math.Max(0, previousLine); i < current.Line && i < lineCount; i++)
{
mappingsBuilder.Append(";"); // close line
}
if (current.Line < lineCount)
{
if (previousLine == current.Line)
{
// not the first entry for the line
mappingsBuilder.Append(',');
}
var column = current.Column;
// The relative generated column number
Base64VLQ.VLQEncode(column - previousColumn, mappingsBuilder);
previousColumn = column;
if (m != null)
{
// The relative source file id
var sourceId = _sourceFileMap.IndexFor(m.Source);
Base64VLQ.VLQEncode(sourceId - previousSourceFileId, mappingsBuilder);
previousSourceFileId = sourceId;
// The relative source file line and column
var srcline = m.Original.Line;
var srcColumn = m.Original.Column;
Base64VLQ.VLQEncode(srcline - previousSourceLine, mappingsBuilder);
previousSourceLine = srcline;
Base64VLQ.VLQEncode(srcColumn - previousSourceColumn, mappingsBuilder);
previousSourceColumn = srcColumn;
if (m.Name != null)
{
// The relative id for the associated symbol name
var nameId = _nameMap.IndexFor(m.Name);
Base64VLQ.VLQEncode(nameId - previousNameId, mappingsBuilder);
previousNameId = nameId;
}
}
else
{
}
previousLine = current.Line;
previousColumn = current.Column;
}
else
{
Preconditions.checkState(m == null);
}
}
else
{
}
}
mappingsBuilder.Append(";");
var mappings = mappingsBuilder.ToString();
return(mappings);
}