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 SpeechInputClient_h 32 #define SpeechInputClient_h 33 34 #include <wtf/Forward.h> 35 36 #if ENABLE(INPUT_SPEECH) 37 38 namespace WebCore { 39 40 class IntRect; 41 class SecurityOrigin; 42 class SpeechInputListener; 43 44 // Provides an interface for SpeechInput to call into the embedder. 45 class SpeechInputClient { 46 public: 47 // This is the first call made by a listener, registering itself for future callbacks. 48 // When the listener no longer needs speech input (for e.g. when it gets destroyed), 49 // it should set a null listener to stop receiving callbacks. 50 // The client does not take ownership of the pointer. 51 virtual void setListener(SpeechInputListener*) = 0; 52 53 // Starts speech recognition and audio recording. 54 virtual bool startRecognition(int requestId, const IntRect& elementRect, const AtomicString& language, const String& grammar, SecurityOrigin*) = 0; 55 56 // Stops audio recording and performs recognition with the audio recorded until now 57 // (does not discard audio). 58 virtual void stopRecording(int requestId) = 0; 59 60 // Cancels an ongoing recognition and discards any audio recorded so far. No partial 61 // recognition results are returned to the listener. 62 virtual void cancelRecognition(int requestId) = 0; 63 64 protected: ~SpeechInputClient()65 virtual ~SpeechInputClient() { } 66 }; 67 68 } // namespace WebCore 69 70 #endif // ENABLE(INPUT_SPEECH) 71 72 #endif // SpeechInputClient_h 73