1/* 2 * Copyright (C) 2010 Google, Inc. 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 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef PendingScript_h 27#define PendingScript_h 28 29#include "CachedResourceClient.h" 30#include "CachedResourceHandle.h" 31#include <wtf/text/TextPosition.h> 32#include <wtf/PassRefPtr.h> 33#include <wtf/RefPtr.h> 34 35namespace WebCore { 36 37class CachedScript; 38class Element; 39 40// A container for an external script which may be loaded and executed. 41// 42// A CachedResourceHandle alone does not prevent the underlying CachedResource 43// from purging its data buffer. This class holds a dummy client open for its 44// lifetime in order to guarantee that the data buffer will not be purged. 45class PendingScript : public CachedResourceClient { 46public: 47 PendingScript() 48 : m_watchingForLoad(false) 49 , m_startingPosition(TextPosition::belowRangePosition()) 50 { 51 } 52 53 PendingScript(Element* element, CachedScript* cachedScript) 54 : m_watchingForLoad(false) 55 , m_element(element) 56 { 57 setCachedScript(cachedScript); 58 } 59 60 PendingScript(const PendingScript& other) 61 : CachedResourceClient(other) 62 , m_watchingForLoad(other.m_watchingForLoad) 63 , m_element(other.m_element) 64 , m_startingPosition(other.m_startingPosition) 65 { 66 setCachedScript(other.cachedScript()); 67 } 68 69 ~PendingScript(); 70 71 PendingScript& operator=(const PendingScript& other) 72 { 73 if (this == &other) 74 return *this; 75 76 m_watchingForLoad = other.m_watchingForLoad; 77 m_element = other.m_element; 78 m_startingPosition = other.m_startingPosition; 79 setCachedScript(other.cachedScript()); 80 81 return *this; 82 } 83 84 TextPosition startingPosition() const { return m_startingPosition; } 85 void setStartingPosition(const TextPosition& position) { m_startingPosition = position; } 86 87 bool watchingForLoad() const { return m_watchingForLoad; } 88 void setWatchingForLoad(bool b) { m_watchingForLoad = b; } 89 90 Element* element() const { return m_element.get(); } 91 void setElement(Element* element) { m_element = element; } 92 PassRefPtr<Element> releaseElementAndClear(); 93 94 CachedScript* cachedScript() const; 95 void setCachedScript(CachedScript*); 96 97 virtual void notifyFinished(CachedResource*); 98 99private: 100 bool m_watchingForLoad; 101 RefPtr<Element> m_element; 102 TextPosition m_startingPosition; // Only used for inline script tags. 103 CachedResourceHandle<CachedScript> m_cachedScript; 104}; 105 106} 107 108#endif 109