| public GetLineInfoForLine ( int lineNumber ) : LineInfo | ||
| lineNumber | int | The line number. |
| return | LineInfo | |
/// <summary>
/// Completely populate all Region property members. Missing data
/// is computed based on the values that are already present.
/// </summary>
/// <param name="region"></param>
/// <param name="newLineIndex"></param>
public static void Populate(this Region region, NewLineIndex newLineIndex)
{
if (region == null)
{
throw new ArgumentNullException(nameof(region));
}
if (newLineIndex == null)
{
throw new ArgumentNullException(nameof(newLineIndex));
}
// A call to Populate is an implicit indicator that we are working
// with a text region (otherwise the offset and length would be
// sufficient data to constitute the region).
if (region.StartLine == 0)
{
OffsetInfo offsetInfo = newLineIndex.GetOffsetInfoForOffset(region.Offset);
region.StartLine = offsetInfo.LineNumber;
region.StartColumn = offsetInfo.ColumnNumber;
offsetInfo = newLineIndex.GetOffsetInfoForOffset(region.Offset + region.Length);
region.EndLine = offsetInfo.LineNumber;
region.EndColumn = offsetInfo.ColumnNumber;
}
else
{
// Make endColumn and endLine explicit, if not expressed
if (region.EndLine == 0)
{
region.EndLine = region.StartLine;
}
if (region.StartColumn == 0)
{
region.StartColumn = 1;
}
if (region.EndColumn == 0)
{
region.EndColumn = region.StartColumn;
}
LineInfo lineInfo = newLineIndex.GetLineInfoForLine(region.StartLine);
region.Offset = lineInfo.StartOffset + (region.StartColumn - 1);
lineInfo = newLineIndex.GetLineInfoForLine(region.EndLine);
region.Length = lineInfo.StartOffset + (region.EndColumn - 1) - region.Offset;
}
}
private void PopulateCharLength(NewLineIndex lineIndex, Region region)
{
// Populated at this point: StartLine, EndLine, StartColumn, EndColumn, CharOffset
Assert(region.StartLine > 0);
Assert(region.EndLine > 0);
Assert(region.StartColumn > 0);
Assert(region.EndColumn > 0);
Assert(region.CharOffset > 0 || (region.StartLine == 1 && region.StartColumn == 1));
LineInfo lineInfo = lineIndex.GetLineInfoForLine(region.EndLine);
int charLength = lineInfo.StartOffset;
charLength -= region.CharOffset;
charLength += region.EndColumn - 1;
if (region.CharLength == 0)
{
region.CharLength = charLength;
}
Assert(region.CharLength == charLength);
}
private static void PopulateCharOffset(NewLineIndex lineIndex, Region region, string fileText)
{
// Populated at this point: StartLine, EndLine, StartColumn, EndColumn
Debug.Assert(region.StartLine > 0);
Debug.Assert(region.EndLine > 0);
Debug.Assert(region.StartColumn > 0);
Debug.Assert(region.EndColumn > 0);
LineInfo lineInfo = lineIndex.GetLineInfoForLine(region.StartLine);
// Now we have the offset of the starting line. Populate region.CharOffset.
int offset = lineInfo.StartOffset;
offset += region.StartColumn - 1;
if (region.CharOffset == 0)
{
region.CharOffset = offset;
}
Debug.Assert(region.CharOffset == offset);
}
private void PopulateEndColumn(NewLineIndex lineIndex, Region region, string fileText)
{
// Populated at this point: StartLine, EndLine, StartColumn
Assert(region.StartLine > 0);
Assert(region.StartColumn > 0);
Assert(region.EndLine > 0);
if (region.EndColumn == 0)
{
// No explicit end column. Increment from end line through
// the end of the line, excluding new line characters
LineInfo lineInfo = lineIndex.GetLineInfoForLine(region.EndLine);
int endColumnOffset = lineInfo.StartOffset;
while (endColumnOffset < fileText.Length &&
!NewLineIndex.s_newLineCharSet.Contains(fileText[endColumnOffset]))
{
endColumnOffset++;
}
// End columns are 1-indexed
region.EndColumn = endColumnOffset - lineInfo.StartOffset + 1;
}
}
/// <summary>
/// Completely populate all Region property members. Missing data
/// is computed based on the values that are already present.
/// </summary>
/// <param name="region"></param>
/// <param name="newLineIndex"></param>
public static void Populate(this Region region, NewLineIndex newLineIndex)
{
if (region == null)
{
throw new ArgumentNullException(nameof(region));
}
if (newLineIndex == null)
{
throw new ArgumentNullException(nameof(newLineIndex));
}
// A call to Populate is an implicit indicator that we are working
// with a text region (otherwise the offset and length would be
// sufficient data to constitute the region).
if (region.StartLine == 0)
{
OffsetInfo offsetInfo = newLineIndex.GetOffsetInfoForOffset(region.Offset);
region.StartLine = offsetInfo.LineNumber;
region.StartColumn = offsetInfo.ColumnNumber;
offsetInfo = newLineIndex.GetOffsetInfoForOffset(region.Offset + region.Length);
region.EndLine = offsetInfo.LineNumber;
region.EndColumn = offsetInfo.ColumnNumber;
}
else
{
// Make endColumn and endLine explicit, if not expressed
if (region.EndLine == 0) { region.EndLine = region.StartLine; }
if (region.StartColumn == 0) { region.StartColumn = 1; }
if (region.EndColumn == 0) { region.EndColumn = region.StartColumn; }
LineInfo lineInfo = newLineIndex.GetLineInfoForLine(region.StartLine);
region.Offset = lineInfo.StartOffset + (region.StartColumn - 1);
lineInfo = newLineIndex.GetLineInfoForLine(region.EndLine);
region.Length = lineInfo.StartOffset + (region.EndColumn - 1) - region.Offset;
}
}
