AvalonEdit WPF TextEditor（SharpDevelop）：如何突出显示特定范围的文本？
令人难以置信的令人敬畏的AvalonEdit WPF TextEditor控件似乎缺乏一个重要的功能，或者至少我无法弄明白。给定偏移量和长度，使用HighlightColor突出显示TextDocument中的该部分。简单吧？
显然不是。我有RTFM，关于“语法突出显示”的文档让我更加困惑。有人在SharpDevelop论坛上问了同样的问题，我恐怕无法理解Herr Grunwald的回答。
这是我的尝试，使用DocumentHighlighter类（当然它不起作用）：
textEditor1.Text = "1234567890";
HighlightingColor c = new HighlightingColor() { FontWeight = FontWeights.ExtraBold };
DocumentHighlighter dh = new DocumentHighlighter(textEditor1.Document, new HighlightingRuleSet());
HighlightedLine hl = dh.HighlightLine(1);
hl.Sections.Add(new HighlightedSection() { Color = c, Offset = 1, Length = 3 });
没有找到相关结果
已邀请:
4 个回复
哭木算
public class ColorizeAvalonEdit : DocumentColorizingTransformer { protected override void ColorizeLine(DocumentLine line) { int lineStartOffset = line.Offset; string text = CurrentContext.Document.GetText(line); int start = 0; int index; while ((index = text.IndexOf("AvalonEdit", start)) >= 0) { base.ChangeLinePart( lineStartOffset + index, // startOffset lineStartOffset + index + 10, // endOffset (VisualLineElement element) => { // This lambda gets called once for every VisualLineElement // between the specified offsets. Typeface tf = element.TextRunProperties.Typeface; // Replace the typeface with a modified version of // the same typeface element.TextRunProperties.SetTypeface(new Typeface( tf.FontFamily, FontStyles.Italic, FontWeights.Bold, tf.Stretch )); }); start = index + 1; // search for next occurrence } } }苏髓骗撩
类正在做的事情。拈吉勉犬姆
public class OffsetColorizer : DocumentColorizingTransformer { public int StartOffset { get; set; } public int EndOffset { get; set; } protected override void ColorizeLine(DocumentLine line) { if (line.Length == 0) return; if (line.Offset < StartOffset || line.Offset > EndOffset) return; int start = line.Offset > StartOffset ? line.Offset : StartOffset; int end = EndOffset > line.EndOffset ? line.EndOffset : EndOffset; ChangeLinePart(start, end, element => element.TextRunProperties.SetForegroundBrush(Brushes.Red)); } }倾坞髓
但是，这可以进一步扩展如下：public void SelectText(int offset, int length) { //Get the line number based off the offset. var line = textEditor.Document.GetLineByOffset(offset); var lineNumber = line.LineNumber; //Select the text. textEditor.SelectionStart = offset; textEditor.SelectionLength = length; //Scroll the textEditor to the selected line. var visualTop = textEditor.TextArea.TextView.GetVisualTopByDocumentLine(lineNumber); textEditor.ScrollToVerticalOffset(visualTop); }