| /* |
| * Copyright (C) 2012 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| |
| #ifndef RenderNamedFlowThread_h |
| #define RenderNamedFlowThread_h |
| |
| #include "core/rendering/RenderFlowThread.h" |
| #include "platform/Timer.h" |
| #include "wtf/HashCountedSet.h" |
| #include "wtf/ListHashSet.h" |
| #include "wtf/text/AtomicString.h" |
| |
| namespace WebCore { |
| |
| class NamedFlow; |
| class Node; |
| class RenderNamedFlowThread; |
| |
| typedef ListHashSet<RenderNamedFlowThread*> RenderNamedFlowThreadList; |
| typedef HashCountedSet<RenderNamedFlowThread*> RenderNamedFlowThreadCountedSet; |
| typedef ListHashSet<Node*> NamedFlowContentNodes; |
| |
| class RenderNamedFlowThread FINAL : public RenderFlowThread { |
| public: |
| virtual ~RenderNamedFlowThread(); |
| |
| static RenderNamedFlowThread* createAnonymous(Document*, PassRefPtr<NamedFlow>); |
| |
| const AtomicString& flowThreadName() const; |
| |
| const RenderRegionList& invalidRenderRegionList() const { return m_invalidRegionList; } |
| |
| RenderObject* nextRendererForNode(Node*) const; |
| RenderObject* previousRendererForNode(Node*) const; |
| |
| void addFlowChild(RenderObject* newChild); |
| void removeFlowChild(RenderObject*); |
| bool hasChildren() const { return !m_flowThreadChildList.isEmpty(); } |
| #ifndef NDEBUG |
| bool hasChild(RenderObject* child) const { return m_flowThreadChildList.contains(child); } |
| #endif |
| |
| void pushDependencies(RenderNamedFlowThreadList&); |
| |
| virtual void addRegionToThread(RenderRegion*) OVERRIDE; |
| virtual void removeRegionFromThread(RenderRegion*) OVERRIDE; |
| |
| virtual void regionChangedWritingMode(RenderRegion*) OVERRIDE; |
| |
| bool overset() const { return m_overset; } |
| void computeOversetStateForRegions(LayoutUnit oldClientAfterEdge); |
| |
| void registerNamedFlowContentNode(Node*); |
| void unregisterNamedFlowContentNode(Node*); |
| const NamedFlowContentNodes& contentNodes() const { return m_contentNodes; } |
| bool hasContentNode(Node* contentNode) const { ASSERT(contentNode); return m_contentNodes.contains(contentNode); } |
| bool isMarkedForDestruction() const; |
| void getRanges(Vector<RefPtr<Range> >&, const RenderRegion*) const; |
| |
| protected: |
| void setMarkForDestruction(); |
| void resetMarkForDestruction(); |
| |
| private: |
| RenderNamedFlowThread(PassRefPtr<NamedFlow>); |
| |
| virtual const char* renderName() const OVERRIDE; |
| virtual bool isRenderNamedFlowThread() const OVERRIDE { return true; } |
| virtual bool isChildAllowed(RenderObject*, RenderStyle*) const OVERRIDE; |
| |
| virtual void dispatchRegionLayoutUpdateEvent() OVERRIDE; |
| virtual void dispatchRegionOversetChangeEvent() OVERRIDE; |
| |
| bool dependsOn(RenderNamedFlowThread* otherRenderFlowThread) const; |
| void addDependencyOnFlowThread(RenderNamedFlowThread*); |
| void removeDependencyOnFlowThread(RenderNamedFlowThread*); |
| |
| void addRegionToNamedFlowThread(RenderRegion*); |
| |
| void checkInvalidRegions(); |
| |
| bool canBeDestroyed() const { return m_invalidRegionList.isEmpty() && m_regionList.isEmpty() && m_contentNodes.isEmpty(); } |
| void regionLayoutUpdateEventTimerFired(Timer<RenderNamedFlowThread>*); |
| void regionOversetChangeEventTimerFired(Timer<RenderNamedFlowThread>*); |
| void clearContentNodes(); |
| void updateWritingMode(); |
| |
| private: |
| // Observer flow threads have invalid regions that depend on the state of this thread |
| // to re-validate their regions. Keeping a set of observer threads make it easy |
| // to notify them when a region was removed from this flow. |
| RenderNamedFlowThreadCountedSet m_observerThreadsSet; |
| |
| // Some threads need to have a complete layout before we layout this flow. |
| // That's because they contain a RenderRegion that should display this thread. The set makes it |
| // easy to sort the order of threads layout. |
| RenderNamedFlowThreadCountedSet m_layoutBeforeThreadsSet; |
| |
| // Holds the sorted children of a named flow. This is the only way we can get the ordering right. |
| typedef ListHashSet<RenderObject*> FlowThreadChildList; |
| FlowThreadChildList m_flowThreadChildList; |
| |
| NamedFlowContentNodes m_contentNodes; |
| |
| RenderRegionList m_invalidRegionList; |
| |
| bool m_overset : 1; |
| |
| // The DOM Object that represents a named flow. |
| RefPtr<NamedFlow> m_namedFlow; |
| |
| Timer<RenderNamedFlowThread> m_regionLayoutUpdateEventTimer; |
| Timer<RenderNamedFlowThread> m_regionOversetChangeEventTimer; |
| }; |
| |
| DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderNamedFlowThread, isRenderNamedFlowThread()); |
| |
| } // namespace WebCore |
| |
| #endif // RenderNamedFlowThread_h |
| |