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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 WebSpeechInputListener_h | |
32 #define WebSpeechInputListener_h | |
33 | |
34 #include "WebSpeechInputResult.h" | |
35 | |
36 namespace WebKit { | |
37 | |
38 class WebString; | |
39 | |
40 // Provides a WebKit API called by the embedder. | |
41 // A typical sequence of calls to the listener would be | |
42 // 1 call to didCompleteRecording | |
43 // 0 or more calls to setRecognitionResult | |
44 // 1 call to didCompleteRecognition | |
45 class WebSpeechInputListener { | |
46 public: | |
47 // Informs that audio recording has completed and recognition is underway. T
his gets invoked | |
48 // irrespective of whether recording was stopped automatically by the 'endpo
inter' or if | |
49 // WebSpeechInputController::stopRecording() was called. | |
50 // Typically after this call the listener would update the UI to reflect tha
t recognition is | |
51 // in progress. | |
52 virtual void didCompleteRecording(int) { WEBKIT_ASSERT_NOT_REACHED(); } | |
53 | |
54 // Gives results from speech recognition, either partial or the final result
s. | |
55 // This method can potentially get called multiple times if there are partia
l results | |
56 // available as the user keeps speaking. If the speech could not be recogniz
ed properly | |
57 // or if there was any other errors in the process, this method may never be
called. | |
58 virtual void setRecognitionResult(int, const WebSpeechInputResultArray&) { W
EBKIT_ASSERT_NOT_REACHED(); } | |
59 | |
60 // Informs that speech recognition has completed. This gets invoked irrespec
tive of whether | |
61 // recognition was succesful or not, whether setRecognitionResult() was invo
ked or not. The | |
62 // handler typically frees up any temporary resources allocated and waits fo
r the next speech | |
63 // recognition request. | |
64 virtual void didCompleteRecognition(int) { WEBKIT_ASSERT_NOT_REACHED(); } | |
65 | |
66 protected: | |
67 ~WebSpeechInputListener() { } | |
68 }; | |
69 | |
70 } // namespace WebKit | |
71 | |
72 #endif // WebSpeechInputListener_h | |
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