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 NamedFlow_h 31 #define NamedFlow_h 32 33 #include "bindings/v8/ScriptWrappable.h" 34 #include "core/events/EventTarget.h" 35 #include "wtf/RefCounted.h" 36 #include "wtf/RefPtr.h" 37 #include "wtf/text/AtomicString.h" 38 39 namespace WebCore { 40 41 class Document; 42 class NamedFlowCollection; 43 class Node; 44 class NodeList; 45 class RenderNamedFlowThread; 46 class ExecutionContext; 47 48 class NamedFlow : public RefCounted<NamedFlow>, public ScriptWrappable, public EventTargetWithInlineData { 49 REFCOUNTED_EVENT_TARGET(NamedFlow); 50 public: 51 static PassRefPtr<NamedFlow> create(PassRefPtr<NamedFlowCollection> manager, const AtomicString& flowThreadName); 52 53 ~NamedFlow(); 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 virtual const AtomicString& interfaceName() const OVERRIDE; 63 virtual ExecutionContext* executionContext() const OVERRIDE; 64 65 // This function is called from the JS binding code to determine if the NamedFlow object is reachable or not. 66 // If the object has listeners, the object should only be discarded if the parent Document is not reachable. 67 Node* ownerNode() const; 68 69 void setRenderer(RenderNamedFlowThread* parentFlowThread); 70 71 enum FlowState { 72 FlowStateCreated, 73 FlowStateNull 74 }; 75 flowState()76 FlowState flowState() const { return m_parentFlowThread ? FlowStateCreated : FlowStateNull; } 77 78 void dispatchRegionLayoutUpdateEvent(); 79 void dispatchRegionOversetChangeEvent(); 80 81 private: 82 NamedFlow(PassRefPtr<NamedFlowCollection>, const AtomicString&); 83 84 // The name of the flow thread as specified in CSS. 85 AtomicString m_flowThreadName; 86 87 RefPtr<NamedFlowCollection> m_flowManager; 88 RenderNamedFlowThread* m_parentFlowThread; 89 }; 90 91 } 92 93 #endif 94