protected override int?GetLineNumber(ITextViewLine viewLine, ref LineNumberState state)
{
if (owner == null)
{
return(null);
}
CustomLineNumberState customState;
if (state == null)
{
state = customState = new CustomLineNumberState();
}
else
{
customState = (CustomLineNumberState)state;
}
if (state.SnapshotLine == null || state.SnapshotLine.EndIncludingLineBreak != viewLine.Start)
{
state.SnapshotLine = viewLine.Start.GetContainingLine();
}
else
{
state.SnapshotLine = state.SnapshotLine.Snapshot.GetLineFromLineNumber(state.SnapshotLine.LineNumber + 1);
}
return(owner.GetLineNumber(viewLine, state.SnapshotLine, ref customState.State));
}
Line CreateLine(ITextViewLine viewLine, LineNumberState lineNumberState, int lineNumber)
{
var lineNumberString = GetLineNumberString(lineNumber);
var lineNumberSource = new LineNumberSource(lineNumberString, GetLineNumberTextFormattingRunProperties(viewLine, lineNumberState, lineNumber));
var textLine = textFormatter !.FormatLine(lineNumberSource, 0, 0, defaultTextParagraphProperties, null);
return(new Line(lineNumber, textLine, lineNumberTextRight, viewLine.TextTop + viewLine.Baseline - textLine.TextBaseline));
}
void UpdateLines(IList <ITextViewLine> newOrReformattedLines, IList <ITextViewLine> translatedLines)
{
if (wpfTextViewHost.IsClosed)
{
return;
}
var textViewLines = wpfTextViewHost.TextView.TextViewLines;
if (textViewLines == null)
{
return;
}
foreach (var viewLine in newOrReformattedLines)
{
if (identityTagToLine.TryGetValue(viewLine.IdentityTag, out var line))
{
identityTagToLine.Remove(viewLine.IdentityTag);
line.Dispose();
}
}
foreach (var viewLine in translatedLines)
{
if (identityTagToLine.TryGetValue(viewLine.IdentityTag, out var line))
{
identityTagToLine.Remove(viewLine.IdentityTag);
line.Dispose();
}
}
var newDict = new Dictionary <object, Line>();
LineNumberState lineNumberState = null;
foreach (var viewLine in textViewLines)
{
var lineNumber = GetLineNumber(viewLine, ref lineNumberState);
if (lineNumber == null)
{
continue;
}
if (!identityTagToLine.TryGetValue(viewLine.IdentityTag, out var line) || line.Number != lineNumber)
{
line = CreateLine(viewLine, lineNumberState, lineNumber.Value);
}
else
{
identityTagToLine.Remove(viewLine.IdentityTag);
}
newDict[viewLine.IdentityTag] = line;
}
foreach (var line in identityTagToLine.Values)
{
line.Dispose();
}
identityTagToLine = newDict;
textLayer.UpdateLines(identityTagToLine.Values.ToArray());
}
protected override int? GetLineNumber(ITextViewLine viewLine, ref LineNumberState state) {
if (!viewLine.IsFirstTextViewLineForSnapshotLine)
return null;
if (state == null)
state = new LineNumberState();
if (state.SnapshotLine == null || state.SnapshotLine.EndIncludingLineBreak != viewLine.Start)
state.SnapshotLine = viewLine.Start.GetContainingLine();
else
state.SnapshotLine = state.SnapshotLine.Snapshot.GetLineFromLineNumber(state.SnapshotLine.LineNumber + 1);
return state.SnapshotLine.LineNumber + 1;
}
protected override int? GetLineNumber(ITextViewLine viewLine, ref LineNumberState state) {
if (owner == null)
return null;
CustomLineNumberState customState;
if (state == null)
state = customState = new CustomLineNumberState();
else
customState = (CustomLineNumberState)state;
if (state.SnapshotLine == null || state.SnapshotLine.EndIncludingLineBreak != viewLine.Start)
state.SnapshotLine = viewLine.Start.GetContainingLine();
else
state.SnapshotLine = state.SnapshotLine.Snapshot.GetLineFromLineNumber(state.SnapshotLine.LineNumber + 1);
return owner.GetLineNumber(viewLine, state.SnapshotLine, ref customState.State);
}
protected override int?GetLineNumber(ITextViewLine viewLine, ref LineNumberState state)
{
if (!viewLine.IsFirstTextViewLineForSnapshotLine)
{
return(null);
}
if (state == null)
{
state = new LineNumberState();
}
if (state.SnapshotLine == null || state.SnapshotLine.EndIncludingLineBreak != viewLine.Start)
{
state.SnapshotLine = viewLine.Start.GetContainingLine();
}
else
{
state.SnapshotLine = state.SnapshotLine.Snapshot.GetLineFromLineNumber(state.SnapshotLine.LineNumber + 1);
}
return(state.SnapshotLine.LineNumber + 1);
}
protected override TextFormattingRunProperties GetLineNumberTextFormattingRunProperties(ITextViewLine viewLine, LineNumberState state, int lineNumber) {
Debug.Assert(owner != null);
Debug.Assert(state != null);
if (owner == null)
throw new InvalidOperationException();
var customState = (CustomLineNumberState)state;
return owner.GetLineNumberTextFormattingRunProperties(viewLine, customState.SnapshotLine, lineNumber, customState.State);
}
protected abstract TextFormattingRunProperties GetLineNumberTextFormattingRunProperties(ITextViewLine viewLine, LineNumberState state, int lineNumber);
Line CreateLine(ITextViewLine viewLine, LineNumberState lineNumberState, int lineNumber) {
var lineNumberString = GetLineNumberString(lineNumber);
var lineNumberSource = new LineNumberSource(lineNumberString, GetLineNumberTextFormattingRunProperties(viewLine, lineNumberState, lineNumber));
var textLine = textFormatter.FormatLine(lineNumberSource, 0, 0, defaultTextParagraphProperties, null);
return new Line(lineNumber, textLine, lineNumberTextRight, viewLine.TextTop + viewLine.Baseline - textLine.TextBaseline);
}
protected abstract int? GetLineNumber(ITextViewLine viewLine, ref LineNumberState state);
protected abstract TextFormattingRunProperties GetLineNumberTextFormattingRunProperties(ITextViewLine viewLine, LineNumberState state, int lineNumber);
protected override TextFormattingRunProperties GetLineNumberTextFormattingRunProperties(ITextViewLine viewLine, LineNumberState state, int lineNumber)
{
Debug.Assert(owner != null);
Debug.Assert(state != null);
if (owner == null)
{
throw new InvalidOperationException();
}
var customState = (CustomLineNumberState)state;
return(owner.GetLineNumberTextFormattingRunProperties(viewLine, customState.SnapshotLine, lineNumber, customState.State));
}
protected abstract int?GetLineNumber(ITextViewLine viewLine, ref LineNumberState state);
protected override TextFormattingRunProperties GetLineNumberTextFormattingRunProperties(ITextViewLine viewLine, LineNumberState state, int lineNumber) => lineNumberTextFormattingRunProperties;
protected override TextFormattingRunProperties GetLineNumberTextFormattingRunProperties(ITextViewLine viewLine, LineNumberState state, int lineNumber) => lineNumberTextFormattingRunProperties;