1 /* 2 * Copyright (C) 2013 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 Stream_h 32 #define Stream_h 33 34 #include "bindings/core/v8/ScriptWrappable.h" 35 #include "core/dom/ActiveDOMObject.h" 36 #include "platform/heap/Handle.h" 37 #include "platform/weborigin/KURL.h" 38 #include "wtf/PassRefPtr.h" 39 #include "wtf/RefCounted.h" 40 #include "wtf/text/WTFString.h" 41 42 namespace blink { 43 44 class ExecutionContext; 45 46 class Stream FINAL : public RefCountedWillBeGarbageCollectedFinalized<Stream>, public ScriptWrappable, public ActiveDOMObject { 47 DEFINE_WRAPPERTYPEINFO(); 48 public: 49 static PassRefPtrWillBeRawPtr<Stream> create(ExecutionContext* context, const String& mediaType) 50 { 51 RefPtrWillBeRawPtr<Stream> stream = adoptRefWillBeNoop(new Stream(context, mediaType)); 52 stream->suspendIfNeeded(); 53 return stream.release(); 54 } 55 56 virtual ~Stream(); 57 58 // Returns the internal URL referring to this stream. 59 const KURL& url() const { return m_internalURL; } 60 // Returns the media type of this stream. 61 const String& type() const { return m_mediaType; } 62 63 // Appends data to this stream. 64 void addData(const char* data, size_t len); 65 // Mark this stream finalized so that a reader of this stream is notified 66 // of EOF. 67 void finalize(); 68 // Mark this stream finalized due to an error so that a reader of this 69 // stream is notified of EOF due to the error. 70 void abort(); 71 72 // Allow an external reader class to mark this object neutered so that they 73 // won't load the corresponding stream again. All stream objects are 74 // read-once for now. 75 void neuter() { m_isNeutered = true; } 76 bool isNeutered() const { return m_isNeutered; } 77 78 // Implementation of ActiveDOMObject. 79 // 80 // FIXME: Implement suspend() and resume() when necessary. 81 virtual void suspend() OVERRIDE; 82 virtual void resume() OVERRIDE; 83 virtual void stop() OVERRIDE; 84 85 void trace(Visitor*) { } 86 87 protected: 88 Stream(ExecutionContext*, const String& mediaType); 89 90 // This is an internal URL referring to the blob data associated with this object. It serves 91 // as an identifier for this blob. The internal URL is never used to source the blob's content 92 // into an HTML or for FileRead'ing, public blob URLs must be used for those purposes. 93 KURL m_internalURL; 94 95 String m_mediaType; 96 97 bool m_isNeutered; 98 }; 99 100 } // namespace blink 101 102 #endif // Stream_h 103
