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/*
* Copyright (C) 2007, 2010 Rob Buis <buis@kde.org>
*
* 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 "core/svg/SVGViewSpec.h"
#include "bindings/v8/ExceptionMessages.h"
#include "bindings/v8/ExceptionState.h"
#include "core/SVGNames.h"
#include "core/dom/Document.h"
#include "core/dom/ExceptionCode.h"
#include "core/svg/SVGAnimatedTransformList.h"
#include "core/svg/SVGParserUtilities.h"
namespace WebCore {
SVGViewSpec::SVGViewSpec(SVGSVGElement* contextElement)
// Note: addToPropertyMap is not needed, as SVGViewSpec do not correspond to an element.
// Note: We make tear-offs' contextElement the target element of SVGViewSpec.
// This contextElement will be only used for keeping this alive from the tearoff.
// SVGSVGElement holds a strong-ref to this SVGViewSpec, so this is kept alive as:
// AnimatedProperty tearoff -(contextElement)-> SVGSVGElement -(RefPtr)-> SVGViewSpec.
: SVGFitToViewBox(contextElement, PropertyMapPolicySkip)
, m_contextElement(contextElement)
, m_transform(SVGAnimatedTransformList::create(contextElement, SVGNames::transformAttr, SVGTransformList::create()))
{
ASSERT(m_contextElement);
ScriptWrappable::init(this);
viewBox()->setReadOnly();
preserveAspectRatio()->setReadOnly();
m_transform->setReadOnly();
// Note: addToPropertyMap is not needed, as SVGViewSpec do not correspond to an element.
}
bool SVGViewSpec::parseViewSpec(const String& spec)
{
if (spec.isEmpty() || !m_contextElement)
return false;
if (spec.is8Bit()) {
const LChar* ptr = spec.characters8();
const LChar* end = ptr + spec.length();
return parseViewSpecInternal(ptr, end);
}
const UChar* ptr = spec.characters16();
const UChar* end = ptr + spec.length();
return parseViewSpecInternal(ptr, end);
}
void SVGViewSpec::reset()
{
resetZoomAndPan();
m_transform->baseValue()->clear();
updateViewBox(FloatRect());
ASSERT(preserveAspectRatio());
preserveAspectRatio()->baseValue()->setAlign(SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMID);
preserveAspectRatio()->baseValue()->setMeetOrSlice(SVGPreserveAspectRatio::SVG_MEETORSLICE_MEET);
m_viewTargetString = emptyString();
}
void SVGViewSpec::detachContextElement()
{
m_transform = nullptr;
clearViewBox();
clearPreserveAspectRatio();
m_contextElement = nullptr;
}
SVGElement* SVGViewSpec::viewTarget() const
{
if (!m_contextElement)
return 0;
Element* element = m_contextElement->treeScope().getElementById(AtomicString(m_viewTargetString));
if (!element || !element->isSVGElement())
return 0;
return toSVGElement(element);
}
String SVGViewSpec::viewBoxString() const
{
if (!viewBox())
return String();
return viewBox()->currentValue()->valueAsString();
}
String SVGViewSpec::preserveAspectRatioString() const
{
if (!preserveAspectRatio())
return String();
return preserveAspectRatio()->baseValue()->valueAsString();
}
String SVGViewSpec::transformString() const
{
if (!m_transform)
return String();
return m_transform->baseValue()->valueAsString();
}
void SVGViewSpec::setZoomAndPan(unsigned short, ExceptionState& exceptionState)
{
// SVGViewSpec and all of its content is read-only.
exceptionState.throwDOMException(NoModificationAllowedError, ExceptionMessages::readOnly());
}
static const LChar svgViewSpec[] = {'s', 'v', 'g', 'V', 'i', 'e', 'w'};
static const LChar viewBoxSpec[] = {'v', 'i', 'e', 'w', 'B', 'o', 'x'};
static const LChar preserveAspectRatioSpec[] = {'p', 'r', 'e', 's', 'e', 'r', 'v', 'e', 'A', 's', 'p', 'e', 'c', 't', 'R', 'a', 't', 'i', 'o'};
static const LChar transformSpec[] = {'t', 'r', 'a', 'n', 's', 'f', 'o', 'r', 'm'};
static const LChar zoomAndPanSpec[] = {'z', 'o', 'o', 'm', 'A', 'n', 'd', 'P', 'a', 'n'};
static const LChar viewTargetSpec[] = {'v', 'i', 'e', 'w', 'T', 'a', 'r', 'g', 'e', 't'};
template<typename CharType>
bool SVGViewSpec::parseViewSpecInternal(const CharType* ptr, const CharType* end)
{
if (!skipString(ptr, end, svgViewSpec, WTF_ARRAY_LENGTH(svgViewSpec)))
return false;
if (ptr >= end || *ptr != '(')
return false;
ptr++;
while (ptr < end && *ptr != ')') {
if (*ptr == 'v') {
if (skipString(ptr, end, viewBoxSpec, WTF_ARRAY_LENGTH(viewBoxSpec))) {
if (ptr >= end || *ptr != '(')
return false;
ptr++;
float x = 0.0f;
float y = 0.0f;
float width = 0.0f;
float height = 0.0f;
if (!(parseNumber(ptr, end, x) && parseNumber(ptr, end, y) && parseNumber(ptr, end, width) && parseNumber(ptr, end, height, DisallowWhitespace)))
return false;
updateViewBox(FloatRect(x, y, width, height));
if (ptr >= end || *ptr != ')')
return false;
ptr++;
} else if (skipString(ptr, end, viewTargetSpec, WTF_ARRAY_LENGTH(viewTargetSpec))) {
if (ptr >= end || *ptr != '(')
return false;
const CharType* viewTargetStart = ++ptr;
while (ptr < end && *ptr != ')')
ptr++;
if (ptr >= end)
return false;
m_viewTargetString = String(viewTargetStart, ptr - viewTargetStart);
ptr++;
} else
return false;
} else if (*ptr == 'z') {
if (!skipString(ptr, end, zoomAndPanSpec, WTF_ARRAY_LENGTH(zoomAndPanSpec)))
return false;
if (ptr >= end || *ptr != '(')
return false;
ptr++;
if (!parseZoomAndPan(ptr, end))
return false;
if (ptr >= end || *ptr != ')')
return false;
ptr++;
} else if (*ptr == 'p') {
if (!skipString(ptr, end, preserveAspectRatioSpec, WTF_ARRAY_LENGTH(preserveAspectRatioSpec)))
return false;
if (ptr >= end || *ptr != '(')
return false;
ptr++;
if (!preserveAspectRatio()->baseValue()->parse(ptr, end, false))
return false;
if (ptr >= end || *ptr != ')')
return false;
ptr++;
} else if (*ptr == 't') {
if (!skipString(ptr, end, transformSpec, WTF_ARRAY_LENGTH(transformSpec)))
return false;
if (ptr >= end || *ptr != '(')
return false;
ptr++;
m_transform->baseValue()->parse(ptr, end);
if (ptr >= end || *ptr != ')')
return false;
ptr++;
} else
return false;
if (ptr < end && *ptr == ';')
ptr++;
}
if (ptr >= end || *ptr != ')')
return false;
return true;
}
void SVGViewSpec::trace(Visitor* visitor)
{
visitor->trace(m_contextElement);
}
}
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