1/* 2 * Copyright (C) 2011 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 WebKitNamedFlow_h 31#define WebKitNamedFlow_h 32 33#include "EventTarget.h" 34 35#include <wtf/ListHashSet.h> 36#include <wtf/RefCounted.h> 37#include <wtf/RefPtr.h> 38#include <wtf/text/AtomicString.h> 39 40namespace WebCore { 41 42class Document; 43class NamedFlowCollection; 44class Node; 45class NodeList; 46class RenderNamedFlowThread; 47class ScriptExecutionContext; 48 49class WebKitNamedFlow : public RefCounted<WebKitNamedFlow>, public EventTarget { 50public: 51 static PassRefPtr<WebKitNamedFlow> create(PassRefPtr<NamedFlowCollection> manager, const AtomicString& flowThreadName); 52 53 ~WebKitNamedFlow(); 54 55 const AtomicString& name() const; 56 bool overset() const; 57 int firstEmptyRegionIndex() const; 58 PassRefPtr<NodeList> getRegionsByContent(Node*); 59 PassRefPtr<NodeList> getRegions(); 60 PassRefPtr<NodeList> getContent(); 61 62 using RefCounted<WebKitNamedFlow>::ref; 63 using RefCounted<WebKitNamedFlow>::deref; 64 65 virtual const AtomicString& interfaceName() const; 66 virtual ScriptExecutionContext* scriptExecutionContext() const; 67 68 // This function is called from the JS binding code to determine if the NamedFlow object is reachable or not. 69 // If the object has listeners, the object should only be discarded if the parent Document is not reachable. 70 Node* ownerNode() const; 71 72 void setRenderer(RenderNamedFlowThread* parentFlowThread); 73 74 enum FlowState { 75 FlowStateCreated, 76 FlowStateNull 77 }; 78 79 FlowState flowState() const { return m_parentFlowThread ? FlowStateCreated : FlowStateNull; } 80 81 void dispatchRegionLayoutUpdateEvent(); 82 83private: 84 WebKitNamedFlow(PassRefPtr<NamedFlowCollection>, const AtomicString&); 85 86 // EventTarget implementation. 87 virtual void refEventTarget() { ref(); } 88 virtual void derefEventTarget() { deref(); } 89 90 virtual EventTargetData* eventTargetData() OVERRIDE; 91 virtual EventTargetData* ensureEventTargetData() OVERRIDE; 92 93 // The name of the flow thread as specified in CSS. 94 AtomicString m_flowThreadName; 95 96 RefPtr<NamedFlowCollection> m_flowManager; 97 RenderNamedFlowThread* m_parentFlowThread; 98 99 EventTargetData m_eventTargetData; 100}; 101 102} 103 104#endif 105