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112		112
113	bool DocumentCursor::atStartOfDocument() const	113	bool DocumentCursor::atStartOfDocument() const
114	{	114	{
115	return line() == 0 && column() == 0;	115	return line() == 0 && column() == 0;
116	}	116	}
117		117
118	bool DocumentCursor::atEndOfDocument() const	118	bool DocumentCursor::atEndOfDocument() const
119	{	119	{
120	return m_cursor == document()->documentEnd();	120	// avoid costly lineLength computation if we are not in the last line
		121	// this is called often e.g. during search & replace, >> 2% of the total costs
		122	const auto lastLine = document()->lines() - 1;
		123	return line() == lastLine && column() == document()->lineLength(lastLine);
121	}	124	}
122		125
123	bool DocumentCursor::gotoNextLine()	126	bool DocumentCursor::gotoNextLine()
124	{	127	{
125	// only allow valid cursors	128	// only allow valid cursors
126	const bool ok = isValid() && (line() + 1 < document()->lines());	129	const bool ok = isValid() && (line() + 1 < document()->lines());
127		130
128	if (ok) {	131	if (ok) {
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