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| 1 /* | |
| 2 * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions | |
| 6 * are met: | |
| 7 * | |
| 8 * 1. Redistributions of source code must retain the above | |
| 9 * copyright notice, this list of conditions and the following | |
| 10 * disclaimer. | |
| 11 * 2. Redistributions in binary form must reproduce the above | |
| 12 * copyright notice, this list of conditions and the following | |
| 13 * disclaimer in the documentation and/or other materials | |
| 14 * provided with the distribution. | |
| 15 * | |
| 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER "AS IS" AND ANY | |
| 17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE | |
| 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, | |
| 21 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 23 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR | |
| 25 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF | |
| 26 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 27 * SUCH DAMAGE. | |
| 28 */ | |
| 29 | |
| 30 #ifndef FlowThreadController_h | |
| 31 #define FlowThreadController_h | |
| 32 | |
| 33 #include "core/rendering/RenderView.h" | |
| 34 #include "wtf/ListHashSet.h" | |
| 35 #include "wtf/OwnPtr.h" | |
| 36 | |
| 37 namespace WebCore { | |
| 38 | |
| 39 class RenderFlowThread; | |
| 40 class RenderNamedFlowThread; | |
| 41 | |
| 42 typedef ListHashSet<RenderNamedFlowThread*> RenderNamedFlowThreadList; | |
| 43 | |
| 44 class FlowThreadController { | |
| 45 WTF_MAKE_FAST_ALLOCATED; | |
| 46 public: | |
| 47 static PassOwnPtr<FlowThreadController> create(RenderView*); | |
| 48 ~FlowThreadController(); | |
| 49 | |
| 50 RenderFlowThread* currentRenderFlowThread() const { return m_currentRenderFl
owThread; } | |
| 51 void setCurrentRenderFlowThread(RenderFlowThread* flowThread) { m_currentRen
derFlowThread = flowThread; } | |
| 52 | |
| 53 bool isRenderNamedFlowThreadOrderDirty() const { return m_isRenderNamedFlowT
hreadOrderDirty; } | |
| 54 void setIsRenderNamedFlowThreadOrderDirty(bool dirty) | |
| 55 { | |
| 56 m_isRenderNamedFlowThreadOrderDirty = dirty; | |
| 57 if (dirty) | |
| 58 m_view->setNeedsLayout(); | |
| 59 } | |
| 60 | |
| 61 RenderNamedFlowThread* ensureRenderFlowThreadWithName(const AtomicString&); | |
| 62 const RenderNamedFlowThreadList* renderNamedFlowThreadList() const { return
m_renderNamedFlowThreadList.get(); } | |
| 63 bool hasRenderNamedFlowThreads() const { return m_renderNamedFlowThreadList
&& !m_renderNamedFlowThreadList->isEmpty(); } | |
| 64 void layoutRenderNamedFlowThreads(); | |
| 65 void styleDidChange(); | |
| 66 | |
| 67 void registerNamedFlowContentNode(Node*, RenderNamedFlowThread*); | |
| 68 void unregisterNamedFlowContentNode(Node*); | |
| 69 bool isContentNodeRegisteredWithAnyNamedFlow(const Node*) const; | |
| 70 | |
| 71 bool hasFlowThreadsWithAutoLogicalHeightRegions() const { return m_flowThrea
dsWithAutoLogicalHeightRegions; } | |
| 72 void incrementFlowThreadsWithAutoLogicalHeightRegions() { ++m_flowThreadsWit
hAutoLogicalHeightRegions; } | |
| 73 void decrementFlowThreadsWithAutoLogicalHeightRegions() { ASSERT(m_flowThrea
dsWithAutoLogicalHeightRegions > 0); --m_flowThreadsWithAutoLogicalHeightRegions
; } | |
| 74 | |
| 75 bool updateFlowThreadsNeedingLayout(); | |
| 76 bool updateFlowThreadsNeedingTwoStepLayout(); | |
| 77 void updateFlowThreadsIntoConstrainedPhase(); | |
| 78 | |
| 79 #ifndef NDEBUG | |
| 80 bool isAutoLogicalHeightRegionsCountConsistent() const; | |
| 81 #endif | |
| 82 | |
| 83 protected: | |
| 84 FlowThreadController(RenderView*); | |
| 85 void updateFlowThreadsChainIfNecessary(); | |
| 86 void resetFlowThreadsWithAutoHeightRegions(); | |
| 87 | |
| 88 private: | |
| 89 RenderView* m_view; | |
| 90 RenderFlowThread* m_currentRenderFlowThread; | |
| 91 bool m_isRenderNamedFlowThreadOrderDirty; | |
| 92 unsigned m_flowThreadsWithAutoLogicalHeightRegions; | |
| 93 OwnPtr<RenderNamedFlowThreadList> m_renderNamedFlowThreadList; | |
| 94 // maps a content node to its render flow thread. | |
| 95 HashMap<const Node*, RenderNamedFlowThread*> m_mapNamedFlowContentNodes; | |
| 96 }; | |
| 97 | |
| 98 } | |
| 99 | |
| 100 #endif | |
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Chromium Code Reviews
Issue 143323014:
*** DO NOT LAND *** Attempt to understand Regions complexity
Base URL: svn://svn.chromium.org/blink/trunk