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160// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
using System;
using System.ComponentModel;
using System.Globalization;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.TextFormatting;
using Tango.Scripting.Editors.Document;
using Tango.Scripting.Editors.Rendering;
using Tango.Scripting.Editors.Utils;
namespace Tango.Scripting.Editors.Editing
{
/// <summary>
/// Margin showing line numbers.
/// </summary>
public class LineNumberMargin : AbstractMargin, IWeakEventListener
{
public Brush Foreground
{
get { return (Brush)GetValue(ForegroundProperty); }
set { SetValue(ForegroundProperty, value); }
}
public static readonly DependencyProperty ForegroundProperty =
DependencyProperty.Register("Foreground", typeof(Brush), typeof(LineNumberMargin), new PropertyMetadata(Brushes.Gray));
static LineNumberMargin()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(LineNumberMargin),
new FrameworkPropertyMetadata(typeof(LineNumberMargin)));
}
TextArea textArea;
Typeface typeface;
double emSize;
/// <inheritdoc/>
protected override Size MeasureOverride(Size availableSize)
{
typeface = this.CreateTypeface();
emSize = (double)GetValue(TextBlock.FontSizeProperty);
FormattedText text = TextFormatterFactory.CreateFormattedText(
this,
new string('9', maxLineNumberLength),
typeface,
emSize,
Foreground
);
return new Size(text.Width, 0);
}
/// <inheritdoc/>
protected override void OnRender(DrawingContext drawingContext)
{
TextView textView = this.TextView;
Size renderSize = this.RenderSize;
if (textView != null && textView.VisualLinesValid) {
var foreground = Foreground;
foreach (VisualLine line in textView.VisualLines) {
int lineNumber = line.FirstDocumentLine.LineNumber;
FormattedText text = TextFormatterFactory.CreateFormattedText(
this,
lineNumber.ToString(CultureInfo.CurrentCulture),
typeface, emSize, |
