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 Blob_h 32 #define Blob_h 33 34 #include "bindings/v8/ScriptWrappable.h" 35 #include "core/html/URLRegistry.h" 36 #include "platform/blob/BlobData.h" 37 #include "platform/heap/Handle.h" 38 #include "wtf/PassOwnPtr.h" 39 #include "wtf/PassRefPtr.h" 40 #include "wtf/RefCounted.h" 41 #include "wtf/text/WTFString.h" 42 43 namespace WebCore { 44 45 class ExceptionState; 46 class ExecutionContext; 47 48 class Blob : public RefCountedWillBeGarbageCollectedFinalized<Blob>, public ScriptWrappable, public URLRegistrable { 49 public: create()50 static PassRefPtrWillBeRawPtr<Blob> create() 51 { 52 return adoptRefWillBeNoop(new Blob(BlobDataHandle::create())); 53 } 54 create(PassRefPtr<BlobDataHandle> blobDataHandle)55 static PassRefPtrWillBeRawPtr<Blob> create(PassRefPtr<BlobDataHandle> blobDataHandle) 56 { 57 return adoptRefWillBeNoop(new Blob(blobDataHandle)); 58 } 59 60 virtual ~Blob(); 61 size()62 virtual unsigned long long size() const { return m_blobDataHandle->size(); } 63 virtual PassRefPtrWillBeRawPtr<Blob> slice(long long start, long long end, const String& contentType, ExceptionState&) const; 64 65 // To allow ExceptionState to be passed in last, manually enumerate the optional argument overloads. slice(ExceptionState & exceptionState)66 PassRefPtrWillBeRawPtr<Blob> slice(ExceptionState& exceptionState) const 67 { 68 return slice(0, std::numeric_limits<long long>::max(), String(), exceptionState); 69 } slice(long long start,ExceptionState & exceptionState)70 PassRefPtrWillBeRawPtr<Blob> slice(long long start, ExceptionState& exceptionState) const 71 { 72 return slice(start, std::numeric_limits<long long>::max(), String(), exceptionState); 73 } slice(long long start,long long end,ExceptionState & exceptionState)74 PassRefPtrWillBeRawPtr<Blob> slice(long long start, long long end, ExceptionState& exceptionState) const 75 { 76 return slice(start, end, String(), exceptionState); 77 } 78 79 virtual void close(ExecutionContext*, ExceptionState&); 80 type()81 String type() const { return m_blobDataHandle->type(); } uuid()82 String uuid() const { return m_blobDataHandle->uuid(); } blobDataHandle()83 PassRefPtr<BlobDataHandle> blobDataHandle() const { return m_blobDataHandle; } 84 // True for all File instances, including the user-built ones. isFile()85 virtual bool isFile() const { return false; } 86 // Only true for File instances that are backed by platform files. hasBackingFile()87 virtual bool hasBackingFile() const { return false; } hasBeenClosed()88 bool hasBeenClosed() const { return m_hasBeenClosed; } 89 90 // Used by the JavaScript Blob and File constructors. 91 virtual void appendTo(BlobData&) const; 92 93 // URLRegistrable to support PublicURLs. 94 virtual URLRegistry& registry() const OVERRIDE FINAL; 95 trace(Visitor *)96 void trace(Visitor*) { } 97 98 protected: 99 explicit Blob(PassRefPtr<BlobDataHandle>); 100 101 static void clampSliceOffsets(long long size, long long& start, long long& end); 102 private: 103 Blob(); 104 105 RefPtr<BlobDataHandle> m_blobDataHandle; 106 bool m_hasBeenClosed; 107 }; 108 109 } // namespace WebCore 110 111 #endif // Blob_h 112