Question

我正在与this code合作。它用于RichTextBox中的语法突出显示。我特别关注函数ProcessLine()和OnTextChanged()，我已将其修改为：

protected override void OnTextChanged(EventArgs e)
{
    // Calculate stuff here.
    m_nContentLength = this.TextLength;

    int nCurrentSelectionStart = SelectionStart;
    int nCurrentSelectionLength = SelectionLength;

    m_bPaint = false;

    // Find the start of the current line.
    m_nLineStart = nCurrentSelectionStart;
    while ((m_nLineStart > 0) && (Text[m_nLineStart - 1] != '\n'))
        m_nLineStart--;
    // Find the end of the current line.
    m_nLineEnd = nCurrentSelectionStart;
    while ((m_nLineEnd < Text.Length) && (Text[m_nLineEnd] != '\n'))
        m_nLineEnd++;
    // Calculate the length of the line.
    m_nLineLength = m_nLineEnd - m_nLineStart;
    // Get the current line.
    m_strLine = Text.Substring(m_nLineStart, m_nLineLength);

    // Process this line.
    ProcessLine();

    m_bPaint = true;
}

// Process a line.
private void ProcessLine()
{
    // Save the position and make the whole line black
    int nPosition = SelectionStart;
    SelectionStart = m_nLineStart;
    SelectionLength = m_nLineLength;
    SelectionColor = Color.Black;

    /*// Process the keywords
    ProcessRegex(m_strKeywords, Settings.KeywordColor);
    // Process numbers
    if(Settings.EnableIntegers)
        ProcessRegex("\\b(?:[0-9]*\\.)?[0-9]+\\b", Settings.IntegerColor);
    // Process strings
    if(Settings.EnableStrings)
        ProcessRegex("\"[^\"\\\\\\r\\n]*(?:\\\\.[^\"\\\\\\r\\n]*)*\"", Settings.StringColor);
    // Process comments
    if(Settings.EnableComments && !string.IsNullOrEmpty(Settings.Comment))
        ProcessRegex(Settings.Comment + ".*$", Settings.CommentColor);*/

    SelectionStart = nPosition;
    SelectionLength = 0;
    SelectionColor = Color.Red;

    m_nCurSelection = nPosition;
}

我的第一个问题是，当我进入ProcessLine()中的OnTextChanged()时，我是否会在m_strLine结束时始终使用换行符？最小值或m_strLine是“\ n”还是最大的“任何#ofchars + \ n”？
正好如此，如果SelectionStart为零，SelectionLength是我的插入位置，如果SelectionLength大于零，则我的插入符号为{{1} }}
我正在尝试修改此代码以为许多不同的语法表达式着色，并且我计划每行一个字符，每行一行。粘贴或加载20k +行的文件时，这怎么可能？

Answer 1

我现在可以建议你使用稳定，功能更强大且不易出错的东西，例如Scintilla for .NET和Color Code。这些控件是免费和开源的。试试看：

ScintillaNET {
{3}}

RichTextBox对于处理大型文本效率极低。即使你得到了一些不错的突出显示，性能问题也会很快开始出现。

Answer 2

这将非常严重。如果你的目标只是一个正常运行的应用程序，你应该做DelegateX建议的事情;如果你是在这里学习如何，首先要找出减少工作量的方法。为此，这里有一些一般指针：

仅突出显示窗口内的文本将是一个没有任何视觉副作用的巨大改进 - 它可能也可以将文本分解为块（通过函数，方法，类等）并且只突出显示块，甚至是被遮挡的部分，以避免偏移起始位置影响高光的问题。如果不这样做，您将遇到第一个渲染线在 if 或括号块的中途，并且结果有一个不平衡的语法树的情况。

你仍然无法使用RichTextBox控件处理20k行，但是数千应该是快速的。

Answer 3

面对同样的问题，未能找到准备好的5分钟＆＃34;解决方案，我已经开发了自己的RichTextBox扩展来突出显示XML。

由于时间压力，我开发得非常快，没有时间对其进行修改 - 所以请随意改进它。

只需复制＆amp;粘贴扩展代码以与RichTextBox一起使用或复制整个应用程序代码包括同步和异步使用

扩展方法

// Use for asynchronous highlight
public delegate void VoidActionOnRichTextBox(RichTextBox richTextBox);

// Extension Class
public static class RichTextBoxExtensions
{
    public static void HighlightXml(this RichTextBox richTextBox)
    {
        new StandardHighlight().HighlightXml(richTextBox);
    }
    public async static void HighlightXmlAsync(this RichTextBox richTextBox)
    {
        var helper = new StandardHighlight();
        var win = new MainWindow();
        await Task.Factory.StartNew(() =>
        {
            richTextBox.Dispatcher.BeginInvoke(new VoidActionOnRichTextBox(helper.HighlightXml), richTextBox);
        });
    }        
}

// You can extent it with more highlight methods
public class StandardHighlight
{        
    public void HighlightXml(RichTextBox richTextBox)
    {
        // Collect Text-Box Information
        var textRange = new TextRange(richTextBox.Document.ContentStart, richTextBox.Document.ContentEnd).Text;
        XDocument xDocument;
        try
        {
            xDocument = XDocument.Parse(textRange);
        }
        catch
        {
            return;
        }
        var documentLines = xDocument.ToString().Split(new[] { Environment.NewLine }, StringSplitOptions.None);

        // Get the Longest Line Length
        int? maxVal = null;
        for (int i = 0; i < documentLines.Length; i++)
        {
            int thisNum = documentLines[i].Length;
            if (!maxVal.HasValue || thisNum > maxVal.Value) { maxVal = thisNum; }
        }

        // Set Text-Box Width & Clear the Current Content
        if (maxVal != null) richTextBox.Document.PageWidth = (double)maxVal * 5.5;
        richTextBox.Document.Blocks.Clear();

        #region *** Process Lines ***
        foreach (var documentLine in documentLines)
        {
            // Parse XML Node Components
            var indentSpace = Regex.Match(documentLine, @"\s+").Value;
            var xmlTags = Regex.Matches(documentLine, @"(<[^/].+?)(?=[\s])|(<[^/].+?>)|(</.+?>)");
            if (documentLine.Contains("<!--")) xmlTags = Regex.Matches(documentLine, @"(<[^/].+?>)"); // Parse comments
            var nodeAttributes = Regex.Matches(documentLine, @"(?<=\s)(.+?)(?=\s)");

            // Process XML Node
            var nodeAttributesCollection = new List<Run>();
            if (nodeAttributes.Count > 0)
            {
                for (int i = 0; i < nodeAttributes.Count; i++)
                {
                    if (!(nodeAttributes[i].Value.Length < 2) && !(documentLine.Contains("<!--")))
                    {
                        var attributeName = $"{Regex.Match(nodeAttributes[i].Value, @"(.+?=)").Value}";
                        if (i == 0) attributeName = $" {Regex.Match(nodeAttributes[i].Value, @"(.+?=)").Value}";
                        var attributeValue = $"{Regex.Match(nodeAttributes[i].Value, @"(?<=(.+?=))"".+?""").Value} ";

                        if (i == nodeAttributes.Count - 1) attributeValue = attributeValue.Trim();
                        nodeAttributesCollection.Add(new Run { Foreground = new SolidColorBrush(Colors.Green), Text = $"{attributeName}" });
                        nodeAttributesCollection.Add(new Run { Foreground = new SolidColorBrush(Colors.Brown), Text = $"{attributeValue}" });
                    }
                }
            }

            // Initialize IndentSpace
            Run run = null;
            if (indentSpace.Length > 1) run = new Run { Text = indentSpace };

            // Initialize Open Tag
            var tagText = xmlTags[0].Value.Substring(1, xmlTags[0].Value.Length - 2);
            var tagTextBrush = new SolidColorBrush(Colors.Blue);
            var tagBorderBruh = new SolidColorBrush(Colors.Red);
            if (tagText.StartsWith("!--"))
            {
                tagTextBrush = new SolidColorBrush(Colors.DarkSlateGray);
                tagBorderBruh = new SolidColorBrush(Colors.DarkSlateGray);
            }
            var openTag = new Run
            {
                Foreground = tagTextBrush,
                Text = tagText
            };

            // Initialize Content Tag
            var content = new Run
            {
                Foreground = new SolidColorBrush(Colors.Black),
            };

            // Initialize Paragraph
            var paragraph = new Paragraph();
            paragraph.Margin = new Thickness(0);
            if (run != null) paragraph.Inlines.Add(run); // Add indent space if exist

            // Process Open Tag
            paragraph.Inlines.Add(new Run { Foreground = tagBorderBruh, Text = "<" });
            paragraph.Inlines.Add(openTag);

            // Process Open Tag Attributes
            if (nodeAttributesCollection.Count > 0)
            {
                nodeAttributesCollection.ForEach(attribute => { paragraph.Inlines.Add(attribute); });
                nodeAttributesCollection.Clear();
            }
            paragraph.Inlines.Add(new Run { Foreground = tagBorderBruh, Text = ">" });

            // Process Closing Tag
            if (xmlTags.Count > 1)
            {
                Run closingTag = new Run();
                content.Text = documentLine.Replace(xmlTags[0].Value, "").Replace(xmlTags[1].Value, "").Trim();
                closingTag = new Run
                {
                    Foreground = new SolidColorBrush(Colors.Blue),
                    Text = xmlTags[1].Value.Substring(1, xmlTags[1].Value.Length - 2)
                };
                paragraph.Inlines.Add(content);

                paragraph.Inlines.Add(new Run { Foreground = new SolidColorBrush(Colors.Red), Text = "<" });
                paragraph.Inlines.Add(closingTag);
                paragraph.Inlines.Add(new Run { Foreground = new SolidColorBrush(Colors.Red), Text = ">" });
            }
            richTextBox.Document.Blocks.Add(paragraph);
        }
        #endregion
    }
}

Answer 4

修正版 - 将JSON作为内部文本和更好的元素提取处理

        public static void HighlightXml(this RichTextBox richTextBox)
        {
            // Collect Text-Box Information
            var textRange = new TextRange(richTextBox.Document.ContentStart, richTextBox.Document.ContentEnd).Text;
            XmlDocument xmlDocument = new XmlDocument();
            try
            {
                xmlDocument.LoadXml(textRange.Trim());
            }
            catch
            {
                return;
            }
            var documentLines = xmlDocument.OuterXml.Split(new[] { Environment.NewLine }, StringSplitOptions.None);

            // Get the Longest Line Length
            int? maxVal = null;
            for (int i = 0; i < documentLines.Length; i++)
            {
                int thisNum = documentLines[i].Length;
                if (!maxVal.HasValue || thisNum > maxVal.Value) { maxVal = thisNum; }
            }

            // Set Text-Box Width & Clear the Current Content
            if (maxVal != null) richTextBox.Document.PageWidth = (double)maxVal * 10;
            richTextBox.Document.Blocks.Clear();

            #region *** Process Lines ***
            foreach (var documentLine in documentLines)
            {
                // Parse XML Node Components
                var indentSpace = Regex.Match(documentLine, @"\s+").Value;
                var xmlTags = Regex.Matches(documentLine, @"(?<=<)[^>\s+]*");
                if (documentLine.Contains("<!--")) xmlTags = Regex.Matches(documentLine, @"(<[^/].+?>)");
                var nodeAttributes = Regex.Matches(documentLine, @"(?<=\s)[^><:\s]*=*(?=[>,\s])");

                // Process XML Node
                var nodeAttributesCollection = new List<Run>();
                if (nodeAttributes.Count > 0)
                {
                    for (int i = 0; i < nodeAttributes.Count; i++)
                    {
                        if (!(nodeAttributes[i].Value.Length < 2) && !(documentLine.Contains("<!--")))
                        {
                            var attributeName = $"{Regex.Match(nodeAttributes[i].Value, @"(.+?=)").Value}";
                            if (i == 0) attributeName = $" {Regex.Match(nodeAttributes[i].Value, @"(.+?=)").Value}";
                            var attributeValue = $"{Regex.Match(nodeAttributes[i].Value, @"(?<=(.+?=))"".+?""").Value} ";

                            if (i == nodeAttributes.Count - 1) attributeValue = attributeValue.Trim();
                            nodeAttributesCollection.Add(new Run { Foreground = new SolidColorBrush(Colors.Green), Text = $"{attributeName}" });
                            nodeAttributesCollection.Add(new Run { Foreground = new SolidColorBrush(Colors.Brown), Text = $"{attributeValue}" });
                        }
                    }
                }

                // Initialize IndentSpace
                Run run = null;
                if (indentSpace.Length > 1) run = new Run { Text = indentSpace };

                // Initialize Open Tag
                var tagText = xmlTags[0].Value;//.Substring(1, xmlTags[0].Value.Length - 2);
                var tagTextBrush = new SolidColorBrush(Colors.Blue);
                var tagBorderBruh = new SolidColorBrush(Colors.Red);
                if (tagText.StartsWith("!--"))
                {
                    tagTextBrush = new SolidColorBrush(Colors.DarkSlateGray);
                    tagBorderBruh = new SolidColorBrush(Colors.DarkSlateGray);
                }
                var openTag = new Run
                {
                    Foreground = tagTextBrush,
                    Text = tagText
                };

                // Initialize Content Tag
                var content = new Run
                {
                    Foreground = new SolidColorBrush(Colors.Black),
                };

                // Initialize Paragraph
                var paragraph = new Paragraph();
                paragraph.Margin = new Thickness(0);
                if (run != null) paragraph.Inlines.Add(run); // Add indent space if exist

                // Process Open Tag
                paragraph.Inlines.Add(new Run { Foreground = tagBorderBruh, Text = "<" });
                paragraph.Inlines.Add(openTag);

                // Process Open Tag Attributes
                if (nodeAttributesCollection.Count > 0)
                {
                    nodeAttributesCollection.ForEach(attribute => { paragraph.Inlines.Add(attribute); });
                    nodeAttributesCollection.Clear();
                }
                paragraph.Inlines.Add(new Run { Foreground = tagBorderBruh, Text = ">" });

                // Process Closing Tag
                if (xmlTags.Count > 1)
                {
                    Run closingTag = new Run();
                    content.Text = documentLine.Replace($"<{xmlTags[0].Value}>", "").Replace($"<{xmlTags[1].Value}>", "").Trim();
                    closingTag = new Run
                    {
                        Foreground = new SolidColorBrush(Colors.Blue),
                        Text = xmlTags[1].Value.Substring(1, xmlTags[1].Value.Length - 1)
                    };
                    paragraph.Inlines.Add(content);

                    paragraph.Inlines.Add(new Run { Foreground = new SolidColorBrush(Colors.Red), Text = "<" });
                    paragraph.Inlines.Add(closingTag);
                    paragraph.Inlines.Add(new Run { Foreground = new SolidColorBrush(Colors.Red), Text = ">" });
                }
                richTextBox.Document.Blocks.Add(paragraph);
            }
            #endregion
        }

RichTextBox语法高亮显示

4 个答案: