blob: b76a8a7be87f6c284f685f24287cd2a9cc1fb043 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
// 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.Collections.Generic;
using System.Windows.Media;
using System.Windows.Media.TextFormatting;
using ICSharpCode.AvalonEdit.Utils;
namespace ICSharpCode.AvalonEdit.Rendering
{
sealed class TextViewCachedElements : IDisposable
{
TextFormatter formatter;
Dictionary<string, TextLine> nonPrintableCharacterTexts;
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 void Dispose()
{
if (nonPrintableCharacterTexts != null) {
foreach (TextLine line in nonPrintableCharacterTexts.Values)
line.Dispose();
}
if (formatter != null)
formatter.Dispose();
}
}
}
|
