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Diffstat (limited to 'svgio/source/svgreader/svgstylenode.cxx')
| -rw-r--r-- | svgio/source/svgreader/svgstylenode.cxx | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/svgio/source/svgreader/svgstylenode.cxx b/svgio/source/svgreader/svgstylenode.cxx new file mode 100644 index 0000000000..88b380cf3b --- /dev/null +++ b/svgio/source/svgreader/svgstylenode.cxx @@ -0,0 +1,231 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#include <svgstylenode.hxx> +#include <svgdocument.hxx> +#include <o3tl/string_view.hxx> +#include <osl/diagnose.h> + +namespace svgio::svgreader +{ + SvgStyleNode::SvgStyleNode( + SvgDocument& rDocument, + SvgNode* pParent) + : SvgNode(SVGToken::Style, rDocument, pParent), + mbTextCss(true) + { + } + + // #i125258# no parent when we are a CssStyle holder to break potential loops because + // when using CssStyles we jump uncontrolled inside the node tree hierarchy + bool SvgStyleNode::supportsParentStyle() const + { + if(isTextCss()) + { + return false; + } + + // call parent + return SvgNode::supportsParentStyle(); + } + + void SvgStyleNode::parseAttribute(SVGToken aSVGToken, const OUString& aContent) + { + // call parent + SvgNode::parseAttribute(aSVGToken, aContent); + + // parse own + switch(aSVGToken) + { + case SVGToken::Type: + { + if(!aContent.isEmpty()) + { + if(!o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"text/css")) + { + setTextCss(false); + } + } + break; + } + default: + { + break; + } + } + } + + void SvgStyleNode::addCssStyleSheet(std::u16string_view aSelectors, const SvgStyleAttributes& rNewStyle) + { + // aSelectors: CssStyle selectors, any combination, no comma separations, no spaces at start/end + // rNewStyle: the already prepared style to register on that name + if(aSelectors.empty()) + return; + + std::vector< OUString > aSelectorParts; + const sal_Int32 nLen(aSelectors.size()); + sal_Int32 nPos(0); + OUStringBuffer aToken; + + // split into single tokens (currently only space separator) + while(nPos < nLen) + { + const sal_Int32 nInitPos(nPos); + copyToLimiter(aSelectors, u' ', nPos, aToken, nLen); + skip_char(aSelectors, u' ', nPos, nLen); + const OUString aSelectorPart(o3tl::trim(aToken)); + aToken.setLength(0); + + if(!aSelectorPart.isEmpty()) + { + aSelectorParts.push_back(aSelectorPart); + } + + if(nInitPos == nPos) + { + OSL_ENSURE(false, "Could not interpret on current position (!)"); + nPos++; + } + } + + if(aSelectorParts.empty()) + return; + + OUStringBuffer aConcatenatedSelector; + + // re-combine without spaces, create a unique name (for now) + for(const auto &a : aSelectorParts) + { + aConcatenatedSelector.append(a); + } + + // CssStyles in SVG are currently not completely supported; the current idea for + // supporting the needed minimal set is to register CssStyles associated to a string + // which is just the space-char cleaned, concatenated Selectors. The part to 'match' + // these is in fillCssStyleVectorUsingHierarchyAndSelectors. There, the same string is + // built up using the priorities of local CssStyle, Id, Class and other info combined + // with the existing hierarchy. This creates a specificity and priority-sorted local + // list for each node which is then chained using get/setCssStyleParent. + // The current solution is capable of solving space-separated selectors which can be + // mixed between Id, Class and type specifiers. + // When CssStyles need more specific solving, the start point is here; remember the + // needed infos not in maIdStyleTokenMapperList at the document, but select evtl. + // more specific infos there in a class capable of handling more complex matchings. + // Additionally fillCssStyleVector (or the mechanism above that when a linked list of + // SvgStyleAttributes will not do it) will have to be adapted to make use of it. + + // register new style at document for (evtl. concatenated) stylename + const_cast< SvgDocument& >(getDocument()).addSvgStyleAttributesToMapper(aConcatenatedSelector.makeStringAndClear(), rNewStyle); + } + + void SvgStyleNode::addCssStyleSheet(std::u16string_view aSelectors, std::u16string_view aContent) + { + // aSelectors: possible comma-separated list of CssStyle definitions, no spaces at start/end + // aContent: the svg style definitions as string + if(aSelectors.empty() || aContent.empty()) + return; + + // comma-separated split (Css abbreviation for same style for multiple selectors) + const sal_Int32 nLen(aSelectors.size()); + sal_Int32 nPos(0); + OUStringBuffer aToken; + + while(nPos < nLen) + { + const sal_Int32 nInitPos(nPos); + copyToLimiter(aSelectors, u',', nPos, aToken, nLen); + skip_char(aSelectors, u' ', u',', nPos, nLen); + + const OUString aSingleName(o3tl::trim(aToken)); + aToken.setLength(0); + + // add the current css class only if wasn't previously added + auto [aIterator, bIsNew] = maSvgStyleAttributes.try_emplace(aSingleName); + if (bIsNew) + { + // create new style and add to local list (for ownership control) and + // in case it's written to again in future classes to prevent overwrites + aIterator->second = std::make_unique<SvgStyleAttributes>(*this); + } + const std::unique_ptr<SvgStyleAttributes>& pCurrentStyle = aIterator->second; + + // fill with content + pCurrentStyle->readCssStyle(aContent); + + if(aSingleName.getLength()) + { + addCssStyleSheet(aSingleName, *pCurrentStyle); + } + + if(nInitPos == nPos) + { + OSL_ENSURE(false, "Could not interpret on current position (!)"); + nPos++; + } + } + } + + void SvgStyleNode::addCssStyleSheet(std::u16string_view aSelectorsAndContent) + { + const sal_Int32 nLen(aSelectorsAndContent.size()); + + if(!nLen) + return; + + sal_Int32 nPos(0); + OUStringBuffer aToken; + + while(nPos < nLen) + { + // read the full selectors (may be multiple, comma-separated) + const sal_Int32 nInitPos(nPos); + skip_char(aSelectorsAndContent, u' ', nPos, nLen); + copyToLimiter(aSelectorsAndContent, u'{', nPos, aToken, nLen); + skip_char(aSelectorsAndContent, u' ', u'{', nPos, nLen); + + const OUString aSelectors(o3tl::trim(aToken)); + aToken.setLength(0); + OUString aContent; + + if(!aSelectors.isEmpty() && nPos < nLen) + { + // isolate content as text, embraced by '{' and '}' + copyToLimiter(aSelectorsAndContent, u'}', nPos, aToken, nLen); + skip_char(aSelectorsAndContent, u' ', u'}', nPos, nLen); + + aContent = o3tl::trim(aToken); + aToken.setLength(0); + } + + if(!aSelectors.isEmpty() && !aContent.isEmpty()) + { + addCssStyleSheet(aSelectors, aContent); + } + + if(nInitPos == nPos) + { + OSL_ENSURE(false, "Could not interpret on current position (!)"); + nPos++; + } + } + } + +} // end of namespace svgio::svgreader + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |