public Collection<IFormattedLine> FormatLineInVisualBuffer(ITextSnapshotLine visualLine) {
if (visualLine == null)
throw new ArgumentNullException(nameof(visualLine));
if (visualLine.Snapshot != TopTextSnapshot)
throw new ArgumentException();
var seqColl = TextAndAdornmentSequencer.CreateTextAndAdornmentCollection(visualLine, visualLine.Snapshot);
var bufferLine = GetBufferLine(seqColl);
var linePartsCollection = CreateLinePartsCollection(seqColl, bufferLine.ExtentIncludingLineBreak);
var textSource = new LinePartsTextSource(linePartsCollection);
var lines = new Collection<IFormattedLine>();
TextLineBreak previousLineBreak = null;
double autoIndent = BaseIndentation;
int column = 0;
int linePartsIndex = 0;
var lineParts = linePartsCollection.LineParts;
for (int lineSegment = 0; ; lineSegment++) {
var paragraphProperties = textParagraphPropertiesFactoryService?.Create(this,
classificationFormatMap.DefaultTextProperties,
TextAndAdornmentSequencer.BufferGraph.CreateMappingSpan(bufferLine.Extent, SpanTrackingMode.EdgeNegative),
TextAndAdornmentSequencer.BufferGraph.CreateMappingPoint(textSource.ConvertColumnToBufferPosition(column), PointTrackingMode.Negative), lineSegment)
?? defaultTextParagraphProperties;
double paragraphWidth = WordWrapWidth == 0 ? 0 : Math.Max(1, WordWrapWidth - autoIndent - wrapGlyphWidth);
textSource.SetMaxLineLength(MAX_LINE_LENGTH);
var textLine = textFormatter.FormatLine(textSource, column, paragraphWidth, paragraphProperties, previousLineBreak);
int startColumn = column;
int length = textLine.GetLength(textSource.EndOfLine);
column += length;
int linePartsEnd = linePartsIndex;
Debug.Assert(lineParts.Count == 0 || linePartsEnd < lineParts.Count);
while (linePartsEnd < lineParts.Count) {
var part = lineParts[linePartsEnd];
linePartsEnd++;
if (column <= part.Column + part.ColumnLength)
break;
}
linePartsEnd--;
var startPos = textSource.ConvertColumnToBufferPosition(startColumn);
var endPos = textSource.ConvertColumnToBufferPosition(column);
if (column >= textSource.Length) {
endPos = bufferLine.ExtentIncludingLineBreak.End;
linePartsEnd = lineParts.Count - 1;
}
var lineSpan = new SnapshotSpan(startPos, endPos);
var wpfLine = new WpfTextViewLine(TextAndAdornmentSequencer.BufferGraph, linePartsCollection, linePartsIndex, linePartsEnd - linePartsIndex + 1, startColumn, column, bufferLine, lineSpan, visualLine.Snapshot, textLine, autoIndent, ColumnWidth);
lines.Add(wpfLine);
if (column >= textSource.Length) {
Debug.Assert(column == textSource.Length);
break;
}
if (startColumn == column)
throw new InvalidOperationException();
linePartsIndex = linePartsEnd;
while (linePartsIndex < lineParts.Count) {
var part = lineParts[linePartsIndex];
if (column < part.Column + part.ColumnLength)
break;
linePartsIndex++;
}
if (lineSegment == 0) {
autoIndent = 0;
var firstCharColumn = textSource.GetColumnOfFirstNonWhitespace();
if (firstCharColumn < column)
autoIndent += textLine.GetDistanceFromCharacterHit(new CharacterHit(firstCharColumn, 0));
autoIndent += TabSize / 2 * ColumnWidth;
if (autoIndent > MaxAutoIndent)
autoIndent = MaxAutoIndent;
// Base indentation should always be included
autoIndent += BaseIndentation;
}
previousLineBreak = textLine.GetTextLineBreak();
}
return lines;
}
public Collection <IFormattedLine> FormatLineInVisualBuffer(ITextSnapshotLine visualLine)
{
if (visualLine == null)
{
throw new ArgumentNullException(nameof(visualLine));
}
if (visualLine.Snapshot != TopTextSnapshot)
{
throw new ArgumentException();
}
var seqColl = TextAndAdornmentSequencer.CreateTextAndAdornmentCollection(visualLine, visualLine.Snapshot);
var bufferLine = GetBufferLine(seqColl);
var linePartsCollection = CreateLinePartsCollection(seqColl, bufferLine.ExtentIncludingLineBreak);
var textSource = new LinePartsTextSource(linePartsCollection);
var lines = new Collection <IFormattedLine>();
TextLineBreak previousLineBreak = null;
double autoIndent = BaseIndentation;
int column = 0;
for (int lineSegment = 0; ; lineSegment++)
{
var paragraphProperties = textParagraphPropertiesFactoryService?.Create(this,
classificationFormatMap.DefaultTextProperties,
TextAndAdornmentSequencer.BufferGraph.CreateMappingSpan(bufferLine.Extent, SpanTrackingMode.EdgeNegative),
TextAndAdornmentSequencer.BufferGraph.CreateMappingPoint(textSource.ConvertColumnToBufferPosition(column), PointTrackingMode.Negative), lineSegment)
?? defaultTextParagraphProperties;
double paragraphWidth = WordWrapWidth == 0 ? 0 : Math.Max(1, WordWrapWidth - autoIndent - wrapGlyphWidth);
textSource.SetMaxLineLength(MAX_LINE_LENGTH);
var textLine = textFormatter.FormatLine(textSource, column, paragraphWidth, paragraphProperties, previousLineBreak);
int startColumn = column;
int length = textLine.GetLength(textSource.EndOfLine);
column += length;
var startPos = textSource.ConvertColumnToBufferPosition(startColumn);
var endPos = textSource.ConvertColumnToBufferPosition(column);
if (column >= textSource.Length)
{
endPos = bufferLine.ExtentIncludingLineBreak.End;
}
var lineSpan = new SnapshotSpan(startPos, endPos);
var wpfLine = new WpfTextViewLine(TextAndAdornmentSequencer.BufferGraph, linePartsCollection, startColumn, column, bufferLine, lineSpan, visualLine.Snapshot, textLine, autoIndent, ColumnWidth);
lines.Add(wpfLine);
if (column >= textSource.Length)
{
Debug.Assert(column == textSource.Length);
break;
}
if (startColumn == column)
{
throw new InvalidOperationException();
}
if (lineSegment == 0)
{
autoIndent = 0;
var firstCharColumn = textSource.GetColumnOfFirstNonWhitespace();
if (firstCharColumn < column)
{
autoIndent += textLine.GetDistanceFromCharacterHit(new CharacterHit(firstCharColumn, 0));
}
autoIndent += TabSize / 2 * ColumnWidth;
if (autoIndent > MaxAutoIndent)
{
autoIndent = MaxAutoIndent;
}
// Base indentation should always be included
autoIndent += BaseIndentation;
}
previousLineBreak = textLine.GetTextLineBreak();
}
return(lines);
}