Differential D19795 Diff 54264 src/utils/katemacroexpander.cpp

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src/utils/katemacroexpander.cpp

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		1		/* This file is part of the KDE project
		2		*
		3		* Copyright 2019 Dominik Haumann <dhaumann@kde.org>
		4		*
		5		* This library is free software; you can redistribute it and/or
		6		* modify it under the terms of the GNU Library General Public
		7		* License as published by the Free Software Foundation; either
		8		* version 2 of the License, or (at your option) any later version.
		9		*
		10		* This library is distributed in the hope that it will be useful,
		11		* but WITHOUT ANY WARRANTY; without even the implied warranty of
		12		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
		13		* Library General Public License for more details.
		14		*
		15		* You should have received a copy of the GNU Library General Public License
		16		* along with this library; see the file COPYING.LIB. If not, write to
		17		* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
		18		* Boston, MA 02110-1301, USA.
		19		*/
		20		#include "katemacroexpander.h"
		21
		22		#include <KTextEditor/Editor>
		23
		24		/**
		25		* Find closing bracket for @p str starting a position @p pos.
		26		*/
		27		static int findClosing(QStringView str, int pos = 0)
		28		{
		29		const int len = str.size();
		30		int nesting = 0;
		31
		32		while (pos < len) {
		33		++pos;
		34		const QChar c = str[pos];
		35		if (c == QLatin1Char('}')) {
		36		if (nesting == 0) {
		37		return pos;
		38		}
		39		nesting--;
		40		} else if (c == QLatin1Char('{')) {
		41		nesting++;
		42		}
		43		}
		44		return -1;
		45		}
		46
		47		QString KateMacroExpander::expandMacro(const QString& input, KTextEditor::View* view)
		48		{
		49		QString output = input;
		50		QString oldStr;
		51		do {
		52		oldStr = output;
		53		const int startIndex = output.indexOf(QStringLiteral("%{"));
		54		if (startIndex < 0) {
		55		break;
		56		}
		57
		58		const int endIndex = findClosing(output, startIndex + 2);
		59		if (endIndex <= startIndex) {
		60		break;
		61		}
		62
		63		const int varLen = endIndex - (startIndex + 2);
		64		QString variable = output.mid(startIndex + 2, varLen);
		65		variable = expandMacro(variable, view);
		66		if (KTextEditor::Editor::instance()->expandVariable(variable, view, variable)) {
		67		output.replace(startIndex, endIndex - startIndex + 1, variable);
		68		}
		69		} while (output != oldStr); // str comparison guards against infinite loop
		70		return output;
		71		}
		72
		73		// kate: space-indent on; indent-width 4; replace-tabs on;