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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"
46 class ExecutionContext;
48 class Blob : public RefCountedWillBeGarbageCollectedFinalized<Blob>, public ScriptWrappable, public URLRegistrable {
50 static PassRefPtrWillBeRawPtr<Blob> create()
52 return adoptRefWillBeNoop(new Blob(BlobDataHandle::create()));
55 static PassRefPtrWillBeRawPtr<Blob> create(PassRefPtr<BlobDataHandle> blobDataHandle)
57 return adoptRefWillBeNoop(new Blob(blobDataHandle));
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;
65 // To allow ExceptionState to be passed in last, manually enumerate the optional argument overloads.
66 PassRefPtrWillBeRawPtr<Blob> slice(ExceptionState& exceptionState) const
68 return slice(0, std::numeric_limits<long long>::max(), String(), exceptionState);
70 PassRefPtrWillBeRawPtr<Blob> slice(long long start, ExceptionState& exceptionState) const
72 return slice(start, std::numeric_limits<long long>::max(), String(), exceptionState);
74 PassRefPtrWillBeRawPtr<Blob> slice(long long start, long long end, ExceptionState& exceptionState) const
76 return slice(start, end, String(), exceptionState);
79 virtual void close(ExecutionContext*, ExceptionState&);
81 String type() const { return m_blobDataHandle->type(); }
82 String uuid() const { return m_blobDataHandle->uuid(); }
83 PassRefPtr<BlobDataHandle> blobDataHandle() const { return m_blobDataHandle; }
84 // True for all File instances, including the user-built ones.
85 virtual bool isFile() const { return false; }
86 // Only true for File instances that are backed by platform files.
87 virtual bool hasBackingFile() const { return false; }
88 bool hasBeenClosed() const { return m_hasBeenClosed; }
90 // Used by the JavaScript Blob and File constructors.
91 virtual void appendTo(BlobData&) const;
93 // URLRegistrable to support PublicURLs.
94 virtual URLRegistry& registry() const OVERRIDE FINAL;
96 void trace(Visitor*) { }
99 explicit Blob(PassRefPtr<BlobDataHandle>);
101 static void clampSliceOffsets(long long size, long long& start, long long& end);
105 RefPtr<BlobDataHandle> m_blobDataHandle;
106 bool m_hasBeenClosed;