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/*************************************************************************
** GroupCollapser.hpp **
** **
** This file is part of dvisvgm -- a fast DVI to SVG converter **
** Copyright (C) 2005-2022 Martin Gieseking <martin.gieseking@uos.de> **
** **
** This program is free software; you can redistribute it and/or **
** modify it under the terms of the GNU General Public License as **
** published by the Free Software Foundation; either version 3 of **
** the License, or (at your option) any later version. **
** **
** This program is distributed in the hope that it will be useful, but **
** WITHOUT ANY WARRANTY; without even the implied warranty of **
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the **
** GNU General Public License for more details. **
** **
** You should have received a copy of the GNU General Public License **
** along with this program; if not, see <http://www.gnu.org/licenses/>. **
*************************************************************************/
#pragma once
#include "OptimizerModule.hpp"
/** Joins the attributes of nested groups and removes groups without attributes. */
class GroupCollapser : public OptimizerModule {
public:
void execute (XMLElement*, XMLElement *context) override {execute(context);};
void execute (XMLElement *context) {execute(context, 0);}
const char* info () const override;
static bool COMBINE_TRANSFORMS;
protected:
void execute (XMLElement *context, int depth);
bool moveAttributes (XMLElement &source, XMLElement &dest);
static bool collapsible (const XMLElement &elem);
static bool unwrappable (const XMLElement &source, const XMLElement &dest);
private:
bool _transformCombined=false; ///< true if transform attributes have been combined
};
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