QSyntaxHighlighter文档中的多行注释显示不正确

Question

参考QT官方网站提供的语法高亮示例，我试图在我的应用程序中实现（实际上你可以调用复制粘贴）相同的多行注释逻辑。作为参考，这是多行注释高亮显示的代码：

构造函数内部：

quotationFormat.setForeground(QColor(164, 14, 14));
rule.pattern = QRegExp("".*"");
rule.format = quotationFormat;
highlightingRules.append(rule);
charFormat.setForeground(QColor(164, 14, 14));
rule.pattern = QRegExp("'.*'");
rule.format = charFormat;
highlightingRules.append(rule);
singleLineCommentFormat.setForeground(Qt::darkGreen);
rule.pattern = QRegExp("//[^n]*");
rule.format = singleLineCommentFormat;
highlightingRules.append(rule);
multiLineCommentFormat.setForeground(Qt::darkGreen);
commentStartExpression = QRegExp("/\*");
commentEndExpression = QRegExp("\*/");

highlightBlock（）函数内部：

foreach (const HighlightingRule &rule, highlightingRules) {
    QRegExp expression(rule.pattern);
    int index = expression.indexIn(text);
    while (index >= 0) {
        int length = expression.matchedLength();
        setFormat(index, length, rule.format);
        index = expression.indexIn(text, index + length);
    }
}
setCurrentBlockState(0);
int startIndex = 0;
if (previousBlockState() != 1)
    startIndex = commentStartExpression.indexIn(text);
while (startIndex >= 0) {
    int endIndex = commentEndExpression.indexIn(text, startIndex);
    int commentLength;
    if (endIndex == -1) {
        setCurrentBlockState(1);
        commentLength = text.length() - startIndex;
    } else {
        commentLength = endIndex - startIndex
                        + commentEndExpression.matchedLength();
    }
    setFormat(startIndex, commentLength, multiLineCommentFormat);
    startIndex = commentStartExpression.indexIn(text, startIndex + commentLength);
}

但当/*出现在引号中时，我仍然面临着一个问题。它以多行注释颜色（绿色）显示，直到结束（/*.png" ] }）请参阅以下示例文档内容以供参考：

{
    "code": [
        "./Code/Main.js"
    ],
    "textures": [
        "./Content/*.png"
    ]
}

我不是正则表达式的大师，但我想Regex有问题。

Answer 1

经过一些运气和努力，我找到了一个变通方法（仍然无法涵盖所有情况）

    int MySyntaxHighlighter::getCommentStartIndex(const QString &text, const int offset)
    {
        int startIndex = -1;
        qDebug() << "offset: " << offset;
        if(text.length() > 1 && offset < (text.length() - 1)) {
            int commentStartIndex = commentStartExpression.indexIn(text, offset);
            qDebug() << "commentStartIndex: " << commentStartIndex;
            QRegExp quotationExpression(quotationRule.pattern);
            int quotationStartIndex = quotationExpression.indexIn(text, offset);
            qDebug() << "quotationStartIndex: " << quotationStartIndex;
            if (quotationStartIndex >= 0) {
                int quotationLength = quotationExpression.matchedLength();
                qDebug() << "quotationLength: " << quotationLength;
                if(commentStartIndex > quotationStartIndex &&
                        commentStartIndex < (quotationStartIndex + quotationLength)) {
                    startIndex = getCommentStartIndex(text, (commentStartIndex + 2));
                } else {
                    startIndex = commentStartIndex;
                }
            } else if(commentStartIndex >= 0) {
                startIndex = commentStartIndex;
            } else {
                startIndex = -1;
            }
        }
        qDebug() << "startIndex: " << startIndex;
        return startIndex;
    }
    void MySyntaxHighlighter::highlightBlock(const QString &text)
    {
        setCurrentBlockState(0);
        qDebug() << "text: " << text;
        qDebug() << "previousBlockState(): " << previousBlockState();
        int startIndex = 0;
        if (previousBlockState() != 1) {
//        startIndex = commentEndExpression.indexIn(text);
            startIndex = getCommentStartIndex(text, 0);
        }
        while (startIndex >= 0) {
            int endIndex = commentEndExpression.indexIn(text, startIndex);
            int commentLength;
            if (endIndex == -1) {
                setCurrentBlockState(1);
                commentLength = text.length() - startIndex;
            } else {
                commentLength = endIndex - startIndex
                                + commentEndExpression.matchedLength();
            }
            setFormat(startIndex, commentLength, multiLineCommentFormat);
    //        startIndex = commentStartExpression.indexIn(text, startIndex + commentLength);
            startIndex = getCommentStartIndex(text, startIndex + commentLength);
        }    
    }

如果有人找到了更好的解决方案，请与我分享。