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/*
* Copyright (C) 2007, 2010 Rob Buis <buis@kde.org>
* Copyright (C) 2018-2019 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "SVGViewSpec.h"
#include "Document.h"
#include "SVGElement.h"
#include "SVGFitToViewBox.h"
#include "SVGNames.h"
#include "SVGParserUtilities.h"
#include "SVGTransformList.h"
#include "SVGTransformable.h"
#include <wtf/text/StringParsingBuffer.h>
namespace WebCore {
SVGViewSpec::SVGViewSpec(SVGElement& contextElement)
: SVGFitToViewBox(&contextElement, SVGPropertyAccess::ReadOnly)
, m_contextElement(contextElement)
, m_transform(SVGTransformList::create(&contextElement, SVGPropertyAccess::ReadOnly))
{
static std::once_flag onceFlag;
std::call_once(onceFlag, [] {
PropertyRegistry::registerProperty<SVGNames::transformAttr, &SVGViewSpec::m_transform>();
});
}
SVGElement* SVGViewSpec::viewTarget() const
{
if (!m_contextElement)
return nullptr;
auto* element = m_contextElement->treeScope().getElementById(m_viewTargetString);
if (!is<SVGElement>(element))
return nullptr;
return downcast<SVGElement>(element);
}
void SVGViewSpec::reset()
{
m_viewTargetString = emptyString();
m_transform->clearItems();
SVGFitToViewBox::reset();
SVGZoomAndPan::reset();
}
template<typename CharacterType> static constexpr CharacterType svgViewSpec[] = {'s', 'v', 'g', 'V', 'i', 'e', 'w'};
template<typename CharacterType> static constexpr CharacterType viewBoxSpec[] = {'v', 'i', 'e', 'w', 'B', 'o', 'x'};
template<typename CharacterType> static constexpr CharacterType preserveAspectRatioSpec[] = {'p', 'r', 'e', 's', 'e', 'r', 'v', 'e', 'A', 's', 'p', 'e', 'c', 't', 'R', 'a', 't', 'i', 'o'};
template<typename CharacterType> static constexpr CharacterType transformSpec[] = {'t', 'r', 'a', 'n', 's', 'f', 'o', 'r', 'm'};
template<typename CharacterType> static constexpr CharacterType zoomAndPanSpec[] = {'z', 'o', 'o', 'm', 'A', 'n', 'd', 'P', 'a', 'n'};
template<typename CharacterType> static constexpr CharacterType viewTargetSpec[] = {'v', 'i', 'e', 'w', 'T', 'a', 'r', 'g', 'e', 't'};
bool SVGViewSpec::parseViewSpec(StringView string)
{
return readCharactersForParsing(string, [&](auto buffer) -> bool {
using CharacterType = typename decltype(buffer)::CharacterType;
if (buffer.atEnd() || !m_contextElement)
return false;
if (!skipCharactersExactly(buffer, svgViewSpec<CharacterType>))
return false;
if (!skipExactly(buffer, '('))
return false;
while (buffer.hasCharactersRemaining() && *buffer != ')') {
if (*buffer == 'v') {
if (skipCharactersExactly(buffer, viewBoxSpec<CharacterType>)) {
if (!skipExactly(buffer, '('))
return false;
auto viewBox = SVGFitToViewBox::parseViewBox(buffer, false);
if (!viewBox)
return false;
setViewBox(WTFMove(*viewBox));
if (!skipExactly(buffer, ')'))
return false;
} else if (skipCharactersExactly(buffer, viewTargetSpec<CharacterType>)) {
if (!skipExactly(buffer, '('))
return false;
auto viewTargetStart = buffer.position();
skipUntil(buffer, ')');
if (buffer.atEnd())
return false;
m_viewTargetString = String(viewTargetStart, buffer.position() - viewTargetStart);
++buffer;
} else
return false;
} else if (*buffer == 'z') {
if (!skipCharactersExactly(buffer, zoomAndPanSpec<CharacterType>))
return false;
if (!skipExactly(buffer, '('))
return false;
auto zoomAndPan = SVGZoomAndPan::parseZoomAndPan(buffer);
if (!zoomAndPan)
return false;
setZoomAndPan(*zoomAndPan);
if (!skipExactly(buffer, ')'))
return false;
} else if (*buffer == 'p') {
if (!skipCharactersExactly(buffer, preserveAspectRatioSpec<CharacterType>))
return false;
if (!skipExactly(buffer, '('))
return false;
SVGPreserveAspectRatioValue preserveAspectRatio;
if (!preserveAspectRatio.parse(buffer, false))
return false;
setPreserveAspectRatio(preserveAspectRatio);
if (!skipExactly(buffer, ')'))
return false;
} else if (*buffer == 't') {
if (!skipCharactersExactly(buffer, transformSpec<CharacterType>))
return false;
if (!skipExactly(buffer, '('))
return false;
m_transform->parse(buffer);
if (!skipExactly(buffer, ')'))
return false;
} else
return false;
skipExactly(buffer, ';');
}
if (buffer.atEnd() || *buffer != ')')
return false;
return true;
});
}
}
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