| /* |
| * 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 |