// rendering
protected override void OnRender(DrawingContext drawingContext)
{
// draw background
drawingContext.PushClip(new RectangleGeometry(new Rect(0, 0, this.ActualWidth, this.ActualHeight)));
drawingContext.DrawRectangle(this.BackgroundBrush, new Pen(), new Rect(0, 0, this.ActualWidth, this.ActualHeight));
// draw text
if (this.Text != String.Empty)
{
FormattedText ft = new FormattedText(
this.Text,
System.Globalization.CultureInfo.CurrentCulture,
FlowDirection.LeftToRight,
new Typeface(this.FontFamily.Source),
this.FontSize, ForegroundBrush);
var left_margin = 4.0 + this.BorderThickness.Left + LineNumberMarginWidth;
var top_margin = 2.0 + this.BorderThickness.Top;
// Background highlight
//if (HighlightText != null && HighlightText.Count > 0)
//{
// foreach (string text in HighlightText)
// {
// int txtEnd = this.Text.Length;
// int index = 0;
// int lastIndex = this.Text.LastIndexOf(text, StringComparison.OrdinalIgnoreCase);
// while (index <= lastIndex)
// {
// index = this.Text.IndexOf(text, index, StringComparison.OrdinalIgnoreCase);
// Geometry geom = ft.BuildHighlightGeometry(new Point(left_margin, top_margin - this.VerticalOffset), index, text.Length);
// if (geom != null)
// {
// drawingContext.DrawGeometry(HighlightBrush, null, geom);
// }
// index += 1;
// }
// }
//}
//if (SyntaxLexer != null)
//{
// // set color of tokens by syntax rules
// foreach (var t in SyntaxLexer.Tokens)
// {
// SyntaxRuleItem rule = GetSyntaxRule(t.TokenType);
// if (rule != null)
// {
// ft.SetForegroundBrush(rule.Foreground, t.Start, t.Length);
// }
// }
//}
ft.Trimming = TextTrimming.None;
// left from first char boundary
double left_border = GetRectFromCharacterIndex(0).Left;
if (!Double.IsInfinity(left_border))
{
_left_text_border = left_border;
}
drawingContext.DrawText(ft, new Point(_left_text_border - this.HorizontalOffset, top_margin - this.VerticalOffset));
// draw lines
if (this.GetLastVisibleLineIndex() != -1)
{
LastLineNumberFormat = GetLineNumbers();
}
if (LastLineNumberFormat != null)
{
LastLineNumberFormat.SetForegroundBrush(LineNumberBrush);
drawingContext.DrawText(LastLineNumberFormat, new Point(3, top_margin));
}
}
}
// rendering
protected override void OnRender(DrawingContext drawingContext)
{
// draw background
drawingContext.PushClip(new RectangleGeometry(new Rect(0, 0, ActualWidth, ActualHeight)));
drawingContext.DrawRectangle(BackgroundBrush, new Pen(), new Rect(0, 0, ActualWidth, ActualHeight));
// draw text
if (Text == string.Empty)
{
return;
}
var formattedText = new FormattedText(
Text,
System.Globalization.CultureInfo.CurrentCulture,
FlowDirection.LeftToRight,
new Typeface(FontFamily.Source),
FontSize, ForegroundBrush);
var leftMargin = 4.0 + BorderThickness.Left + LineNumberMarginWidth;
var topMargin = 2.0 + BorderThickness.Top;
// Background highlight
if (HighlightText != null && HighlightText.Any())
{
foreach (string text in HighlightText)
{
var index = 0;
var lastIndex = Text.LastIndexOf(text, StringComparison.OrdinalIgnoreCase);
while (index <= lastIndex)
{
index = Text.IndexOf(text, index, StringComparison.OrdinalIgnoreCase);
Geometry geom = formattedText.BuildHighlightGeometry(new Point(leftMargin, topMargin - VerticalOffset), index, text.Length);
if (geom != null)
{
drawingContext.DrawGeometry(HighlightBrush, null, geom);
}
index += 1;
}
}
}
HighlightSyntax(formattedText);
// left from first char boundary
var leftBorder = GetRectFromCharacterIndex(0).Left;
if (!double.IsInfinity(leftBorder))
{
_leftTextBorder = leftBorder;
}
drawingContext.DrawText(formattedText, new Point(_leftTextBorder - HorizontalOffset, topMargin - VerticalOffset));
// draw lines
if (GetLastVisibleLineIndex() != -1)
{
LastLineNumberFormat = GetLineNumbers();
}
if (LastLineNumberFormat != null)
{
LastLineNumberFormat.SetForegroundBrush(LineNumberBrush);
drawingContext.DrawText(LastLineNumberFormat, new Point(3, topMargin));
}
}