public override VisualLineElement ConstructElement(int offset)
{
char c = CurrentContext.Document.GetCharAt(offset);
if (ShowSpaces && c == ' ')
{
return(new SpaceTextElement(CurrentContext.TextView.cachedElements.GetTextForNonPrintableCharacter("\u00B7", CurrentContext)));
}
else if (ShowTabs && c == '\t')
{
return(new TabTextElement(CurrentContext.TextView.cachedElements.GetTextForNonPrintableCharacter("\u00BB", CurrentContext)));
}
else if (ShowBoxForControlCharacters && char.IsControl(c))
{
var p = new VisualLineElementTextRunProperties(CurrentContext.GlobalTextRunProperties);
p.SetForegroundBrush(Brushes.White);
var textFormatter = TextFormatterFactory.Create(CurrentContext.TextView);
var text = FormattedTextElement.PrepareText(textFormatter,
TextUtilities.GetControlCharacterName(c), p);
return(new SpecialCharacterBoxElement(text));
}
else
{
return(null);
}
}
/// <inheritdoc/>
public override VisualLineElement ConstructElement(int offset)
{
if (foldingManager == null)
{
return(null);
}
int foldedUntil = -1;
FoldingSection foldingSection = null;
foreach (FoldingSection fs in foldingManager.GetFoldingsContaining(offset))
{
if (fs.IsFolded)
{
if (fs.EndOffset > foldedUntil)
{
foldedUntil = fs.EndOffset;
foldingSection = fs;
}
}
}
if (foldedUntil > offset && foldingSection != null)
{
// Handle overlapping foldings: if there's another folded folding
// (starting within the foldingSection) that continues after the end of the folded section,
// then we'll extend our fold element to cover that overlapping folding.
bool foundOverlappingFolding;
do
{
foundOverlappingFolding = false;
foreach (FoldingSection fs in FoldingManager.GetFoldingsContaining(foldedUntil))
{
if (fs.IsFolded && fs.EndOffset > foldedUntil)
{
foldedUntil = fs.EndOffset;
foundOverlappingFolding = true;
}
}
} while (foundOverlappingFolding);
string title = foldingSection.Title;
if (string.IsNullOrEmpty(title))
{
title = "...";
}
var p = new VisualLineElementTextRunProperties(CurrentContext.GlobalTextRunProperties);
p.SetForegroundBrush(textBrush);
var textFormatter = TextFormatterFactory.Create(CurrentContext.TextView);
var text = FormattedTextElement.PrepareText(textFormatter, title, p);
return(new FoldingLineElement(foldingSection, text, foldedUntil - offset)
{
textBrush = textBrush
});
}
else
{
return(null);
}
}
/// <inheritdoc/>
public override TextRun CreateTextRun(int startVisualColumn, ITextRunConstructionContext context)
{
if (textLine == null)
{
var formatter = TextFormatterFactory.Create(context.TextView);
textLine = PrepareText(formatter, this.text, this.TextRunProperties);
this.text = null;
}
return(new FormattedTextRun(this, this.TextRunProperties));
}
void MakeNewText()
{
if (fmt == null)
{
fmt = TextFormatterFactory.Create(this, provider);
}
if (line != null)
{
line.Dispose();
}
src.UpdateParent(this);
line = fmt.FormatLine(src.Source, 0, 0, new ParaProps(this), null);
}
public TextLine GetTextForNonPrintableCharacter(string text, ITextRunConstructionContext context)
{
if (nonPrintableCharacterTexts == null)
{
nonPrintableCharacterTexts = new Dictionary <string, TextLine>();
}
TextLine textLine;
if (!nonPrintableCharacterTexts.TryGetValue(text, out textLine))
{
var p = new VisualLineElementTextRunProperties(context.GlobalTextRunProperties);
p.SetForegroundBrush(context.TextView.NonPrintableCharacterBrush);
if (formatter == null)
{
formatter = TextFormatterFactory.Create(context.TextView);
}
textLine = FormattedTextElement.PrepareText(formatter, text, p);
nonPrintableCharacterTexts[text] = textLine;
}
return(textLine);
}
public TextLine GetTextForNonPrintableCharacter(string text, ITextRunConstructionContext context)
{
if (_nonPrintableCharacterTexts == null)
{
_nonPrintableCharacterTexts = new Dictionary <string, TextLine>();
}
if (_nonPrintableCharacterTexts.TryGetValue(text, out var textLine))
{
return(textLine);
}
var properties = context.GlobalTextRunProperties.Clone();
properties.ForegroundBrush = context.TextView.NonPrintableCharacterBrush;
if (_formatter == null)
{
_formatter = TextFormatterFactory.Create();
}
textLine = FormattedTextElement.PrepareText(_formatter, text, properties);
_nonPrintableCharacterTexts[text] = textLine;
return(textLine);
}