#include "highlighter.h"
#include "regex-pcre.h"

#include "highlighter.moc"

#include <QLineEdit>
#include <QTextDocument>

RuleSetHighlighter::RuleSetHighlighter(QTextDocument * parent, QLineEdit *regexEditor)
	: QSyntaxHighlighter(parent)
{
	_regexEditor = regexEditor;
}

void RuleSetHighlighter::highlightBlock(const QString & text)
{
	QTextCharFormat defaultFormat;

	QTextCharFormat lightClassFormat;
	lightClassFormat.setBackground(Qt::lightGray);

	QTextCharFormat myClassFormat;
	myClassFormat.setFontWeight(QFont::Bold);
	myClassFormat.setBackground(Qt::green);
	//myClassFormat.setForeground(Qt::darkMagenta);

	//setFormat(0, text.length(), defaultFormat);

	//setFormat(0, 4, myClassFormat);
	QString regex = _regexEditor->text();
	if (regex.length() == 0) return;

	//QRegExp expression(regex);

	PCRERegex expr(regex);
	if (! expr.isValid()) return;

	int rc = expr.match(text);

	if (expr.hasMatched()) {
		setFormat(0, text.length(), lightClassFormat);
	}

	if (rc > 1) {
		//printf("ovector for '%s': %d %d\n",(const char*)text.toAscii(),expr.ovector[0],expr.ovector[1]);
		for (int i=1; i<=rc-1; i++) {
			int index = expr.ovector[2*i];
			int end = expr.ovector[(2*i)+1];
			//printf("\t%d %d\n",index,end);
			if (index == -1 || end == -1) return;
			setFormat(index, end-index, myClassFormat);
		}
	}

	//int index = text.indexOf(expression);
	//while (index >= 0) {
	//	int length = expression.matchedLength();
	//	setFormat(index, length, myClassFormat);
	//	index = text.indexOf(expression, index + length);
	//}
}