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/*************************************************************************
** SVGOptimizer.cpp **
** **
** This file is part of dvisvgm -- a fast DVI to SVG converter **
** Copyright (C) 2005-2023 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/>. **
*************************************************************************/
#include <algorithm>
#include <array>
#include <map>
#include "SVGOptimizer.hpp"
#include "../SVGTree.hpp"
#include "AttributeExtractor.hpp"
#include "ClipPathReassigner.hpp"
#include "GroupCollapser.hpp"
#include "RedundantElementRemover.hpp"
#include "TextSimplifier.hpp"
#include "TransformSimplifier.hpp"
#include "WSNodeRemover.hpp"
using namespace std;
string SVGOptimizer::MODULE_SEQUENCE;
SVGOptimizer::SVGOptimizer (SVGTree *svg) : _svg(svg) {
// optimizer modules available to the user; must be listed in default order
// _moduleEntries.emplace_back(ModuleEntry("remove-ws", util::make_unique<WSNodeRemover>()));
_moduleEntries.emplace_back(ModuleEntry("simplify-text", util::make_unique<TextSimplifier>()));
_moduleEntries.emplace_back(ModuleEntry("simplify-transform", util::make_unique<TransformSimplifier>()));
_moduleEntries.emplace_back(ModuleEntry("group-attributes", util::make_unique<AttributeExtractor>()));
_moduleEntries.emplace_back(ModuleEntry("collapse-groups", util::make_unique<GroupCollapser>()));
_moduleEntries.emplace_back(ModuleEntry("remove-clippaths", util::make_unique<RedundantElementRemover>()));
_moduleEntries.emplace_back(ModuleEntry("reassign-clippaths", util::make_unique<ClipPathReassigner>()));
}
void SVGOptimizer::execute () {
if (!_svg || MODULE_SEQUENCE == "none")
return;
if (MODULE_SEQUENCE.empty())
MODULE_SEQUENCE = "remove-clippath"; // default behaviour of previous dvisvgm releases
else {
if (MODULE_SEQUENCE == "all") {
for (const auto &entry: _moduleEntries)
entry.module->execute(_svg->defsNode(), _svg->pageNode());
}
else {
vector<string> names = util::split(MODULE_SEQUENCE, ",");
auto it = find_if(names.begin(), names.end(), [](const string &name) {
return name == "simplify-transform";
});
GroupCollapser::COMBINE_TRANSFORMS = (it != names.end());
for (const string &name: names) {
if (OptimizerModule *module = getModule(name))
module->execute(_svg->defsNode(), _svg->pageNode());
}
}
}
}
void SVGOptimizer::listModules (ostream &os) const {
size_t maxlen=0;
map<string, const char*> infos;
for (const auto &entry : _moduleEntries) {
maxlen = max(maxlen, entry.modname.length());
infos.emplace(entry.modname, entry.module->info());
}
for (const auto &infopair : infos) {
os << setw(maxlen) << left << infopair.first;
os << " | " << infopair.second << '\n';
}
}
/** Checks if all module names given in a comma-separated list are known.
* @param[in] namestr comma-separated list of module names
* @param[out] unknownNames names not recognized
* @return true if all names are known */
bool SVGOptimizer::checkModuleString (string &namestr, vector<string> &unknownNames) const {
unknownNames.clear();
if (namestr.empty() || namestr == "all" || namestr == "none")
return true;
vector<string> givenNames = util::split(namestr, ",");
for (const string &name : givenNames) {
if (!getModule(name))
unknownNames.emplace_back(name);
}
return unknownNames.empty();
}
OptimizerModule* SVGOptimizer::getModule (const string &name) const {
auto it = find_if(_moduleEntries.begin(), _moduleEntries.end(), [&](const ModuleEntry &entry) {
return entry.modname == name;
});
if (it != _moduleEntries.end())
return (*it).module.get();
return nullptr;
}
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