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/*
* Copyright (C) 2004, 2005, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2004, 2005, 2006, 2007, 2008 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 "SVGTextContentElement.h"
#include "CSSPropertyNames.h"
#include "CSSValueKeywords.h"
#include "Frame.h"
#include "FrameSelection.h"
#include "RenderObject.h"
#include "RenderSVGResource.h"
#include "RenderSVGText.h"
#include "SVGDocumentExtensions.h"
#include "SVGNames.h"
#include "SVGPoint.h"
#include "SVGRect.h"
#include "SVGTextQuery.h"
#include "XMLNames.h"
#include <wtf/IsoMallocInlines.h>
#include <wtf/NeverDestroyed.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(SVGTextContentElement);
// Define custom animated property 'textLength'.
const SVGPropertyInfo* SVGTextContentElement::textLengthPropertyInfo()
{
static const SVGPropertyInfo* s_propertyInfo = nullptr;
if (!s_propertyInfo) {
s_propertyInfo = new SVGPropertyInfo(AnimatedLength,
PropertyIsReadWrite,
SVGNames::textLengthAttr,
SVGNames::textLengthAttr->localName(),
&SVGTextContentElement::synchronizeTextLength,
&SVGTextContentElement::lookupOrCreateTextLengthWrapper);
}
return s_propertyInfo;
}
// Animated property definitions
DEFINE_ANIMATED_ENUMERATION(SVGTextContentElement, SVGNames::lengthAdjustAttr, LengthAdjust, lengthAdjust, SVGLengthAdjustType)
DEFINE_ANIMATED_BOOLEAN(SVGTextContentElement, SVGNames::externalResourcesRequiredAttr, ExternalResourcesRequired, externalResourcesRequired)
BEGIN_REGISTER_ANIMATED_PROPERTIES(SVGTextContentElement)
REGISTER_LOCAL_ANIMATED_PROPERTY(textLength)
REGISTER_LOCAL_ANIMATED_PROPERTY(lengthAdjust)
REGISTER_LOCAL_ANIMATED_PROPERTY(externalResourcesRequired)
REGISTER_PARENT_ANIMATED_PROPERTIES(SVGGraphicsElement)
END_REGISTER_ANIMATED_PROPERTIES
SVGTextContentElement::SVGTextContentElement(const QualifiedName& tagName, Document& document)
: SVGGraphicsElement(tagName, document)
, m_textLength(LengthModeOther)
, m_specifiedTextLength(LengthModeOther)
, m_lengthAdjust(SVGLengthAdjustSpacing)
{
registerAnimatedPropertiesForSVGTextContentElement();
}
void SVGTextContentElement::synchronizeTextLength(SVGElement* contextElement)
{
ASSERT(contextElement);
SVGTextContentElement& ownerType = downcast<SVGTextContentElement>(*contextElement);
if (!ownerType.m_textLength.shouldSynchronize)
return;
AtomicString value(SVGPropertyTraits<SVGLengthValue>::toString(ownerType.m_specifiedTextLength));
ownerType.m_textLength.synchronize(&ownerType, textLengthPropertyInfo()->attributeName, value);
}
Ref<SVGAnimatedProperty> SVGTextContentElement::lookupOrCreateTextLengthWrapper(SVGElement* contextElement)
{
ASSERT(contextElement);
SVGTextContentElement& ownerType = downcast<SVGTextContentElement>(*contextElement);
return SVGAnimatedProperty::lookupOrCreateWrapper<SVGTextContentElement, SVGAnimatedLength, SVGLengthValue>
(&ownerType, textLengthPropertyInfo(), ownerType.m_textLength.value);
}
Ref<SVGAnimatedLength> SVGTextContentElement::textLengthAnimated()
{
static NeverDestroyed<SVGLengthValue> defaultTextLength(LengthModeOther);
if (m_specifiedTextLength == defaultTextLength)
m_textLength.value.newValueSpecifiedUnits(LengthTypeNumber, getComputedTextLength());
m_textLength.shouldSynchronize = true;
return static_reference_cast<SVGAnimatedLength>(lookupOrCreateTextLengthWrapper(this));
}
unsigned SVGTextContentElement::getNumberOfChars()
{
document().updateLayoutIgnorePendingStylesheets();
return SVGTextQuery(renderer()).numberOfCharacters();
}
float SVGTextContentElement::getComputedTextLength()
{
document().updateLayoutIgnorePendingStylesheets();
return SVGTextQuery(renderer()).textLength();
}
ExceptionOr<float> SVGTextContentElement::getSubStringLength(unsigned charnum, unsigned nchars)
{
unsigned numberOfChars = getNumberOfChars();
if (charnum >= numberOfChars)
return Exception { IndexSizeError };
nchars = std::min(nchars, numberOfChars - charnum);
return SVGTextQuery(renderer()).subStringLength(charnum, nchars);
}
ExceptionOr<Ref<SVGPoint>> SVGTextContentElement::getStartPositionOfChar(unsigned charnum)
{
if (charnum > getNumberOfChars())
return Exception { IndexSizeError };
return SVGPoint::create(SVGTextQuery(renderer()).startPositionOfCharacter(charnum));
}
ExceptionOr<Ref<SVGPoint>> SVGTextContentElement::getEndPositionOfChar(unsigned charnum)
{
if (charnum > getNumberOfChars())
return Exception { IndexSizeError };
return SVGPoint::create(SVGTextQuery(renderer()).endPositionOfCharacter(charnum));
}
ExceptionOr<Ref<SVGRect>> SVGTextContentElement::getExtentOfChar(unsigned charnum)
{
if (charnum > getNumberOfChars())
return Exception { IndexSizeError };
return SVGRect::create(SVGTextQuery(renderer()).extentOfCharacter(charnum));
}
ExceptionOr<float> SVGTextContentElement::getRotationOfChar(unsigned charnum)
{
if (charnum > getNumberOfChars())
return Exception { IndexSizeError };
return SVGTextQuery(renderer()).rotationOfCharacter(charnum);
}
int SVGTextContentElement::getCharNumAtPosition(SVGPoint& point)
{
document().updateLayoutIgnorePendingStylesheets();
return SVGTextQuery(renderer()).characterNumberAtPosition(point.propertyReference());
}
ExceptionOr<void> SVGTextContentElement::selectSubString(unsigned charnum, unsigned nchars)
{
unsigned numberOfChars = getNumberOfChars();
if (charnum >= numberOfChars)
return Exception { IndexSizeError };
nchars = std::min(nchars, numberOfChars - charnum);
ASSERT(document().frame());
FrameSelection& selection = document().frame()->selection();
// Find selection start
VisiblePosition start(firstPositionInNode(const_cast<SVGTextContentElement*>(this)));
for (unsigned i = 0; i < charnum; ++i)
start = start.next();
// Find selection end
VisiblePosition end(start);
for (unsigned i = 0; i < nchars; ++i)
end = end.next();
selection.setSelection(VisibleSelection(start, end));
return { };
}
bool SVGTextContentElement::isSupportedAttribute(const QualifiedName& attrName)
{
static const auto supportedAttributes = makeNeverDestroyed([] {
HashSet<QualifiedName> set;
SVGLangSpace::addSupportedAttributes(set);
SVGExternalResourcesRequired::addSupportedAttributes(set);
set.add({ SVGNames::lengthAdjustAttr.get(), SVGNames::textLengthAttr.get() });
return set;
}());
return supportedAttributes.get().contains<SVGAttributeHashTranslator>(attrName);
}
bool SVGTextContentElement::isPresentationAttribute(const QualifiedName& name) const
{
if (name.matches(XMLNames::spaceAttr))
return true;
return SVGGraphicsElement::isPresentationAttribute(name);
}
void SVGTextContentElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStyleProperties& style)
{
if (name.matches(XMLNames::spaceAttr)) {
if (value == "preserve")
addPropertyToPresentationAttributeStyle(style, CSSPropertyWhiteSpace, CSSValuePre);
else
addPropertyToPresentationAttributeStyle(style, CSSPropertyWhiteSpace, CSSValueNowrap);
return;
}
SVGGraphicsElement::collectStyleForPresentationAttribute(name, value, style);
}
void SVGTextContentElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
{
SVGParsingError parseError = NoError;
if (name == SVGNames::lengthAdjustAttr) {
auto propertyValue = SVGPropertyTraits<SVGLengthAdjustType>::fromString(value);
if (propertyValue > 0)
setLengthAdjustBaseValue(propertyValue);
} else if (name == SVGNames::textLengthAttr)
m_textLength.value = SVGLengthValue::construct(LengthModeOther, value, parseError, ForbidNegativeLengths);
reportAttributeParsingError(parseError, name, value);
SVGGraphicsElement::parseAttribute(name, value);
SVGExternalResourcesRequired::parseAttribute(name, value);
}
void SVGTextContentElement::svgAttributeChanged(const QualifiedName& attrName)
{
if (!isSupportedAttribute(attrName)) {
SVGGraphicsElement::svgAttributeChanged(attrName);
return;
}
if (attrName == SVGNames::textLengthAttr)
m_specifiedTextLength = m_textLength.value;
if (auto renderer = this->renderer()) {
InstanceInvalidationGuard guard(*this);
RenderSVGResource::markForLayoutAndParentResourceInvalidation(*renderer);
}
}
bool SVGTextContentElement::selfHasRelativeLengths() const
{
// Any element of the <text> subtree is advertized as using relative lengths.
// On any window size change, we have to relayout the text subtree, as the
// effective 'on-screen' font size may change.
return true;
}
SVGTextContentElement* SVGTextContentElement::elementFromRenderer(RenderObject* renderer)
{
if (!renderer)
return nullptr;
if (!renderer->isSVGText() && !renderer->isSVGInline())
return nullptr;
SVGElement* element = downcast<SVGElement>(renderer->node());
ASSERT(element);
if (!is<SVGTextContentElement>(element))
return nullptr;
return downcast<SVGTextContentElement>(element);
}
}