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/* -*- 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 <osl/diagnose.h>
namespace svgio::svgreader
{
SvgStyleNode::SvgStyleNode(
SvgDocument& rDocument,
SvgNode* pParent)
: SvgNode(SVGToken::Style, rDocument, pParent),
mbTextCss(false)
{
}
// #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(const OUString& rTokenName, SVGToken aSVGToken, const OUString& aContent)
{
// call parent
SvgNode::parseAttribute(rTokenName, aSVGToken, aContent);
// parse own
switch(aSVGToken)
{
case SVGToken::Type:
{
if(!aContent.isEmpty())
{
if(aContent.startsWith("text/css"))
{
setTextCss(true);
}
}
break;
}
default:
{
break;
}
}
}
void SvgStyleNode::addCssStyleSheet(const OUString& 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.isEmpty())
return;
std::vector< OUString > aSelectorParts;
const sal_Int32 nLen(aSelectors.getLength());
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(aToken.makeStringAndClear().trim());
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(const OUString& aSelectors, const OUString& aContent)
{
// aSelectors: possible comma-separated list of CssStyle definitions, no spaces at start/end
// aContent: the svg style definitions as string
if(aSelectors.isEmpty() || aContent.isEmpty())
return;
// comma-separated split (Css abbreviation for same style for multiple selectors)
const sal_Int32 nLen(aSelectors.getLength());
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(aToken.makeStringAndClear().trim());
// 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(const OUString& aSelectorsAndContent)
{
const sal_Int32 nLen(aSelectorsAndContent.getLength());
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(aToken.makeStringAndClear().trim());
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 = aToken.makeStringAndClear().trim();
}
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: */
|
