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/*
* Copyright (C) Research In Motion Limited 2010. 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.
*/
#ifndef SVGListPropertyTearOff_h
#define SVGListPropertyTearOff_h
#if ENABLE(SVG)
#include "SVGListProperty.h"
namespace WebCore {
template<typename PropertyType>
class SVGListPropertyTearOff : public SVGListProperty<PropertyType> {
public:
typedef SVGListProperty<PropertyType> Base;
typedef typename SVGPropertyTraits<PropertyType>::ListItemType ListItemType;
typedef SVGPropertyTearOff<ListItemType> ListItemTearOff;
typedef PassRefPtr<ListItemTearOff> PassListItemTearOff;
typedef SVGAnimatedListPropertyTearOff<PropertyType> AnimatedListPropertyTearOff;
typedef typename SVGAnimatedListPropertyTearOff<PropertyType>::ListWrapperCache ListWrapperCache;
static PassRefPtr<SVGListPropertyTearOff<PropertyType> > create(AnimatedListPropertyTearOff* animatedProperty, SVGPropertyRole role)
{
ASSERT(animatedProperty);
return adoptRef(new SVGListPropertyTearOff<PropertyType>(animatedProperty, role));
}
int removeItemFromList(ListItemTearOff* removeItem, bool shouldSynchronizeWrappers)
{
PropertyType& values = m_animatedProperty->values();
ListWrapperCache& wrappers = m_animatedProperty->wrappers();
// Lookup item in cache and remove its corresponding wrapper.
unsigned size = wrappers.size();
ASSERT(size == values.size());
for (unsigned i = 0; i < size; ++i) {
RefPtr<ListItemTearOff>& item = wrappers.at(i);
if (item != removeItem)
continue;
item->detachWrapper();
wrappers.remove(i);
values.remove(i);
if (shouldSynchronizeWrappers)
commitChange();
return i;
}
return -1;
}
// SVGList API
void clear(ExceptionCode& ec)
{
Base::clearValuesAndWrappers(m_animatedProperty.get(), ec);
}
unsigned numberOfItems() const
{
return Base::numberOfItemsValuesAndWrappers(m_animatedProperty.get());
}
PassListItemTearOff initialize(PassListItemTearOff passNewItem, ExceptionCode& ec)
{
return Base::initializeValuesAndWrappers(m_animatedProperty.get(), passNewItem, ec);
}
PassListItemTearOff getItem(unsigned index, ExceptionCode& ec)
{
return Base::getItemValuesAndWrappers(m_animatedProperty.get(), index, ec);
}
PassListItemTearOff insertItemBefore(PassListItemTearOff passNewItem, unsigned index, ExceptionCode& ec)
{
return Base::insertItemBeforeValuesAndWrappers(m_animatedProperty.get(), passNewItem, index, ec);
}
PassListItemTearOff replaceItem(PassListItemTearOff passNewItem, unsigned index, ExceptionCode& ec)
{
return Base::replaceItemValuesAndWrappers(m_animatedProperty.get(), passNewItem, index, ec);
}
PassListItemTearOff removeItem(unsigned index, ExceptionCode& ec)
{
return Base::removeItemValuesAndWrappers(m_animatedProperty.get(), index, ec);
}
PassListItemTearOff appendItem(PassListItemTearOff passNewItem, ExceptionCode& ec)
{
return Base::appendItemValuesAndWrappers(m_animatedProperty.get(), passNewItem, ec);
}
protected:
SVGListPropertyTearOff(AnimatedListPropertyTearOff* animatedProperty, SVGPropertyRole role)
: SVGListProperty<PropertyType>(role)
, m_animatedProperty(animatedProperty)
{
}
virtual void commitChange()
{
PropertyType& values = m_animatedProperty->values();
ListWrapperCache& wrappers = m_animatedProperty->wrappers();
// Update existing wrappers, as the index in the values list has changed.
unsigned size = wrappers.size();
ASSERT(size == values.size());
for (unsigned i = 0; i < size; ++i) {
RefPtr<ListItemTearOff>& item = wrappers.at(i);
if (!item)
continue;
item->setAnimatedProperty(m_animatedProperty.get());
item->setValue(values.at(i));
}
m_animatedProperty->commitChange();
}
virtual void processIncomingListItemValue(const ListItemType&, unsigned*)
{
ASSERT_NOT_REACHED();
}
virtual void processIncomingListItemWrapper(RefPtr<ListItemTearOff>& newItem, unsigned* indexToModify)
{
SVGAnimatedProperty* animatedPropertyOfItem = newItem->animatedProperty();
// newItem has been created manually, it doesn't belong to any SVGElement.
// (for example: "textElement.x.baseVal.appendItem(svgsvgElement.createSVGLength())")
if (!animatedPropertyOfItem)
return;
// newItem belongs to a SVGElement, but its associated SVGAnimatedProperty is not an animated list tear off.
// (for example: "textElement.x.baseVal.appendItem(rectElement.width.baseVal)")
if (!animatedPropertyOfItem->isAnimatedListTearOff()) {
// We have to copy the incoming newItem, as we're not allowed to insert this tear off as is into our wrapper cache.
// Otherwhise we'll end up having two SVGAnimatedPropertys that operate on the same SVGPropertyTearOff. Consider the example above:
// SVGRectElements SVGAnimatedLength 'width' property baseVal points to the same tear off object
// that's inserted into SVGTextElements SVGAnimatedLengthList 'x'. textElement.x.baseVal.getItem(0).value += 150 would
// mutate the rectElement width _and_ the textElement x list. That's obviously wrong, take care of that.
newItem = ListItemTearOff::create(newItem->propertyReference());
return;
}
// Spec: If newItem is already in a list, it is removed from its previous list before it is inserted into this list.
// 'newItem' is already living in another list. If it's not our list, synchronize the other lists wrappers after the removal.
bool livesInOtherList = animatedPropertyOfItem != m_animatedProperty;
int removedIndex = static_cast<AnimatedListPropertyTearOff*>(animatedPropertyOfItem)->removeItemFromList(newItem.get(), livesInOtherList);
ASSERT(removedIndex != -1);
if (!indexToModify)
return;
// If the item lived in our list, adjust the insertion index.
if (!livesInOtherList) {
unsigned& index = *indexToModify;
// Spec: If the item is already in this list, note that the index of the item to (replace|insert before) is before the removal of the item.
if (static_cast<unsigned>(removedIndex) < index)
--index;
}
}
// Back pointer to the animated property that created us
// For example (text.x.baseVal): m_animatedProperty points to the 'x' SVGAnimatedLengthList object
RefPtr<AnimatedListPropertyTearOff> m_animatedProperty;
};
}
#endif // ENABLE(SVG)
#endif // SVGListPropertyTearOff_h
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