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Diffstat (limited to 'Build/source/texk/dvisvgm/dvisvgm-src/src/optimizer/RedundantElementRemover.cpp')
-rw-r--r-- | Build/source/texk/dvisvgm/dvisvgm-src/src/optimizer/RedundantElementRemover.cpp | 69 |
1 files changed, 0 insertions, 69 deletions
diff --git a/Build/source/texk/dvisvgm/dvisvgm-src/src/optimizer/RedundantElementRemover.cpp b/Build/source/texk/dvisvgm/dvisvgm-src/src/optimizer/RedundantElementRemover.cpp deleted file mode 100644 index f8d040a3299..00000000000 --- a/Build/source/texk/dvisvgm/dvisvgm-src/src/optimizer/RedundantElementRemover.cpp +++ /dev/null @@ -1,69 +0,0 @@ -/************************************************************************* -** RedundantElementRemover.cpp ** -** ** -** This file is part of dvisvgm -- a fast DVI to SVG converter ** -** Copyright (C) 2005-2021 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 "DependencyGraph.hpp" -#include "RedundantElementRemover.hpp" -#include "../XMLNode.hpp" - -using namespace std; - -const char* RedundantElementRemover::info () const { - return "remove redundant 'clipPath' elements"; -} - - -/** Extracts the ID from a local URL reference like url(#abcde) */ -static inline string extract_id_from_url (const string &url) { - return url.substr(5, url.length()-6); -} - - -/** Removes elements present in the SVG tree that are not required. - * For now, only clipPath elements are removed. */ -void RedundantElementRemover::execute (XMLElement *defs, XMLElement *context) { - vector<XMLElement*> clipPathElements; - if (!defs || !context || !defs->getDescendants("clipPath", nullptr, clipPathElements)) - return; - - // collect dependencies between clipPath elements in the defs section of the SVG tree - DependencyGraph<string> idTree; - for (const XMLElement *clip : clipPathElements) { - if (const char *id = clip->getAttributeValue("id")) { - if (const char *url = clip->getAttributeValue("clip-path")) - idTree.insert(extract_id_from_url(url), id); - else - idTree.insert(id); - } - } - // collect elements that reference a clipPath, i.e. have a clip-path attribute - vector<XMLElement*> descendants; - defs->getDescendants("!clipPath", "clip-path", descendants); - context->getDescendants(nullptr, "clip-path", descendants); - // remove referenced IDs and their dependencies from the dependency graph - for (const XMLElement *elem : descendants) { - string idref = extract_id_from_url(elem->getAttributeValue("clip-path")); - idTree.removeDependencyPath(idref); - } - descendants.clear(); - for (const string &str : idTree.getKeys()) { - XMLElement *node = defs->getFirstDescendant("clipPath", "id", str.c_str()); - XMLElement::detach(node); - } -} |