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/core/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 blink { 44 45 class ExceptionState; 46 class ExecutionContext; 47 48 class Blob : public RefCountedWillBeGarbageCollectedFinalized<Blob>, public ScriptWrappable, public URLRegistrable { 49 DEFINE_WRAPPERTYPEINFO(); 50 public: create()51 static PassRefPtrWillBeRawPtr<Blob> create() 52 { 53 return adoptRefWillBeNoop(new Blob(BlobDataHandle::create())); 54 } 55 create(PassRefPtr<BlobDataHandle> blobDataHandle)56 static PassRefPtrWillBeRawPtr<Blob> create(PassRefPtr<BlobDataHandle> blobDataHandle) 57 { 58 return adoptRefWillBeNoop(new Blob(blobDataHandle)); 59 } 60 61 virtual ~Blob(); 62 size()63 virtual unsigned long long size() const { return m_blobDataHandle->size(); } 64 virtual PassRefPtrWillBeRawPtr<Blob> slice(long long start, long long end, const String& contentType, ExceptionState&) const; 65 66 // To allow ExceptionState to be passed in last, manually enumerate the optional argument overloads. slice(ExceptionState & exceptionState)67 PassRefPtrWillBeRawPtr<Blob> slice(ExceptionState& exceptionState) const 68 { 69 return slice(0, std::numeric_limits<long long>::max(), String(), exceptionState); 70 } slice(long long start,ExceptionState & exceptionState)71 PassRefPtrWillBeRawPtr<Blob> slice(long long start, ExceptionState& exceptionState) const 72 { 73 return slice(start, std::numeric_limits<long long>::max(), String(), exceptionState); 74 } slice(long long start,long long end,ExceptionState & exceptionState)75 PassRefPtrWillBeRawPtr<Blob> slice(long long start, long long end, ExceptionState& exceptionState) const 76 { 77 return slice(start, end, String(), exceptionState); 78 } 79 80 virtual void close(ExecutionContext*, ExceptionState&); 81 type()82 String type() const { return m_blobDataHandle->type(); } uuid()83 String uuid() const { return m_blobDataHandle->uuid(); } blobDataHandle()84 PassRefPtr<BlobDataHandle> blobDataHandle() const { return m_blobDataHandle; } 85 // True for all File instances, including the user-built ones. isFile()86 virtual bool isFile() const { return false; } 87 // Only true for File instances that are backed by platform files. hasBackingFile()88 virtual bool hasBackingFile() const { return false; } hasBeenClosed()89 bool hasBeenClosed() const { return m_hasBeenClosed; } 90 91 // Used by the JavaScript Blob and File constructors. 92 virtual void appendTo(BlobData&) const; 93 94 // URLRegistrable to support PublicURLs. 95 virtual URLRegistry& registry() const OVERRIDE FINAL; 96 trace(Visitor *)97 void trace(Visitor*) { } 98 99 protected: 100 explicit Blob(PassRefPtr<BlobDataHandle>); 101 102 static void clampSliceOffsets(long long size, long long& start, long long& end); 103 private: 104 Blob(); 105 106 RefPtr<BlobDataHandle> m_blobDataHandle; 107 bool m_hasBeenClosed; 108 }; 109 110 } // namespace blink 111 112 #endif // Blob_h 113