RichTextBox语法高亮显示

Question

我正在使用此代码.它用于语法高亮显示RichTextBox.我专门找在函数ProcessLine()和OnTextChanged(),我已经修改为这样:

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()in时OnTextChanged(),我会在结尾处总是有换行符m_strLine吗？最小的值m_strLine是"\n"还是最大的"任何#chachars + \n"？

• 就这样我有这个权利,SelectionStart如果SelectionLength是零,我的插入位置是否为零,如果SelectionLength大于零,我的插入符号是SelectStart+SelectionLength？

• 我正在尝试修改此代码以为许多不同的语法表达式着色,并且我计划为每一行一次查看一个字符.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,更不易出错的东西,如Scintilla for .NET和Color Code.这些控件是免费和开源的.尝试一下:

ScintillaNET
ColorCode - .NET的语法突出显示/着色

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.