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 are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef DOMFileSystem_h 32 #define DOMFileSystem_h 33 34 #include "bindings/v8/ScriptWrappable.h" 35 #include "core/dom/ActiveDOMObject.h" 36 #include "core/dom/ScriptExecutionContext.h" 37 #include "modules/filesystem/DOMFileSystemBase.h" 38 #include "modules/filesystem/EntriesCallback.h" 39 40 namespace WebCore { 41 42 class DirectoryEntry; 43 class File; 44 class FileCallback; 45 class FileEntry; 46 class FileWriterCallback; 47 48 class DOMFileSystem : public DOMFileSystemBase, public ScriptWrappable, public ActiveDOMObject { 49 public: 50 static PassRefPtr<DOMFileSystem> create(ScriptExecutionContext*, const String& name, FileSystemType, const KURL& rootURL, PassOwnPtr<AsyncFileSystem>); 51 52 // Creates a new isolated file system for the given filesystemId. 53 static PassRefPtr<DOMFileSystem> createIsolatedFileSystem(ScriptExecutionContext*, const String& filesystemId); 54 55 PassRefPtr<DirectoryEntry> root(); 56 57 // ActiveDOMObject methods. 58 virtual void stop(); 59 virtual bool hasPendingActivity() const; 60 virtual void contextDestroyed(); 61 62 void createWriter(const FileEntry*, PassRefPtr<FileWriterCallback>, PassRefPtr<ErrorCallback>); 63 void createFile(const FileEntry*, PassRefPtr<FileCallback>, PassRefPtr<ErrorCallback>); 64 65 // Schedule a callback. This should not cross threads (should be called on the same context thread). 66 // FIXME: move this to a more generic place. 67 template <typename CB, typename CBArg> 68 static void scheduleCallback(ScriptExecutionContext*, PassRefPtr<CB>, PassRefPtr<CBArg>); 69 70 template <typename CB, typename CBArg> 71 static void scheduleCallback(ScriptExecutionContext*, PassRefPtr<CB>, const CBArg&); 72 73 template <typename CB, typename CBArg> 74 void scheduleCallback(PassRefPtr<CB> callback, PassRefPtr<CBArg> callbackArg) 75 { 76 scheduleCallback(scriptExecutionContext(), callback, callbackArg); 77 } 78 79 template <typename CB, typename CBArg> 80 void scheduleCallback(PassRefPtr<CB> callback, const CBArg& callbackArg) 81 { 82 scheduleCallback(scriptExecutionContext(), callback, callbackArg); 83 } 84 85 private: 86 DOMFileSystem(ScriptExecutionContext*, const String& name, FileSystemType, const KURL& rootURL, PassOwnPtr<AsyncFileSystem>); 87 88 // A helper template to schedule a callback task. 89 template <typename CB, typename CBArg> 90 class DispatchCallbacRefPtrArgTask : public ScriptExecutionContext::Task { 91 public: 92 DispatchCallbacRefPtrArgTask(PassRefPtr<CB> callback, PassRefPtr<CBArg> arg) 93 : m_callback(callback) 94 , m_callbackArg(arg) 95 { 96 } 97 98 virtual void performTask(ScriptExecutionContext*) 99 { 100 m_callback->handleEvent(m_callbackArg.get()); 101 } 102 103 private: 104 RefPtr<CB> m_callback; 105 RefPtr<CBArg> m_callbackArg; 106 }; 107 108 template <typename CB, typename CBArg> 109 class DispatchCallbackNonPtrArgTask : public ScriptExecutionContext::Task { 110 public: 111 DispatchCallbackNonPtrArgTask(PassRefPtr<CB> callback, const CBArg& arg) 112 : m_callback(callback) 113 , m_callbackArg(arg) 114 { 115 } 116 117 virtual void performTask(ScriptExecutionContext*) 118 { 119 m_callback->handleEvent(m_callbackArg); 120 } 121 122 private: 123 RefPtr<CB> m_callback; 124 CBArg m_callbackArg; 125 }; 126 }; 127 128 template <typename CB, typename CBArg> 129 void DOMFileSystem::scheduleCallback(ScriptExecutionContext* scriptExecutionContext, PassRefPtr<CB> callback, PassRefPtr<CBArg> arg) 130 { 131 ASSERT(scriptExecutionContext->isContextThread()); 132 if (callback) 133 scriptExecutionContext->postTask(adoptPtr(new DispatchCallbacRefPtrArgTask<CB, CBArg>(callback, arg))); 134 } 135 136 template <typename CB, typename CBArg> 137 void DOMFileSystem::scheduleCallback(ScriptExecutionContext* scriptExecutionContext, PassRefPtr<CB> callback, const CBArg& arg) 138 { 139 ASSERT(scriptExecutionContext->isContextThread()); 140 if (callback) 141 scriptExecutionContext->postTask(adoptPtr(new DispatchCallbackNonPtrArgTask<CB, CBArg>(callback, arg))); 142 } 143 144 } // namespace 145 146 #endif // DOMFileSystem_h 147