highlighter.hpp

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#ifndef HIGHLIGHTER_H
#define HIGHLIGHTER_H
 
#include <QSyntaxHighlighter>
 
#include <QHash>
#include <QList>
#include <QMutex>
#include <QTextCharFormat>
 
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