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我想突出显示 AvalonEdit 中选定（突出显示）文本的所有实例。VS2010 做到了这一点，这是一个方便的功能。我知道我需要按照下面的代码实现 DocumentColorizingTransformer，但不知道如何从文档中获取选定的文本。选择信息在“CurrentContext”中不可用。

下面的代码查找“AvalonEdit”的所有实例。如何找到所选（突出显示）文本的所有实例。

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
}   }   }
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1 回答 1

2

当前文本选择在 TextEditor 上可用，因此您可以从 ColorizeAvalonEdit 类中使用它。

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
        }
    }
}

然而，这还不足以让所有选定的文本在每一行上都是粗体和斜体，因为只有被修改的行会被更新。为了使所有选定的文本变为粗体和斜体，我必须在选择更改时刷新文本编辑器。

    textEditor.TextArea.TextView.LineTransformers.Add(new ColorizeAvalonEdit(textEditor));
    textEditor.TextArea.SelectionChanged += textEditor_TextArea_SelectionChanged;

    void textEditor_TextArea_SelectionChanged(object sender, EventArgs e)
    {
        this.textEditor.TextArea.TextView.Redraw();
    }
于 2013-07-15T19:01:43.313 回答