highlighter.hpp

Go to the documentation of this file.

#ifndef HIGHLIGHTER_H
#define HIGHLIGHTER_H
 
#include <QSyntaxHighlighter>
 
#include <QHash>
#include <QTextCharFormat>
#include <QMutex>
#include <QList>
 
class QTextDocument;
namespace daq{
namespace QTUtils{
class Highlighter : public QSyntaxHighlighter
{
    Q_OBJECT
 
public:
    Highlighter(QTextDocument *parent = 0); 
    void setRule(QRegExp r, QTextCharFormat f)
    {
        HighlightingRule rule;
        rule.pattern = r;
        rule.format = f;
        highlightingRules.append(rule);
        cache.clear();
 
    }
    void highlightAll(const QString &txt,bool caseSensitivity)
    {
        highlightAllReg.setPattern(txt);
        if(caseSensitivity)
            highlightAllReg.setCaseSensitivity(Qt::CaseSensitive);
        else
            highlightAllReg.setCaseSensitivity(Qt::CaseInsensitive);
        rehighlight();
    }
protected:
    void highlightBlock(const QString &text);
 
private:
    struct HighlightingRule
    {
        QRegExp pattern;
        QTextCharFormat format;
    };
    struct FormatCache{
        HighlightingRule rule;
        QVector<int> indexes;
        QVector<int> lengths;
    };
    QVector<HighlightingRule> highlightingRules; 
    QRegExp highlightAllReg;
    QMutex* mutex;
    QHash<uint, QList<FormatCache> > cache;
};
 
}
}
#endif