| // Copyright 2017 Google Inc. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #ifndef COBALT_SPEECH_SPEECH_SYNTHESIS_H_ |
| #define COBALT_SPEECH_SPEECH_SYNTHESIS_H_ |
| |
| #include <list> |
| |
| #include "base/basictypes.h" |
| #include "base/memory/ref_counted.h" |
| #include "cobalt/dom/event_target.h" |
| #include "cobalt/script/sequence.h" |
| #include "cobalt/script/wrappable.h" |
| #include "cobalt/speech/speech_synthesis_utterance.h" |
| #include "cobalt/speech/speech_synthesis_voice.h" |
| #include "starboard/system.h" |
| |
| namespace cobalt { |
| |
| namespace dom { |
| // Forward declare Navigator, so that we don't pull in it's dependency on |
| // media_session. |
| class Navigator; |
| } // namespace dom |
| |
| namespace speech { |
| |
| // The speech synthesis interface is the scripted web API for controlling a |
| // given speech synthesis. |
| // https://dvcs.w3.org/hg/speech-api/raw-file/4f41ea1126bb/webspeechapi.html#tts-section |
| class SpeechSynthesis : public dom::EventTarget { |
| public: |
| typedef script::Sequence<scoped_refptr<SpeechSynthesisVoice> > |
| SpeechSynthesisVoiceSequence; |
| |
| explicit SpeechSynthesis(const scoped_refptr<dom::Navigator>& navigator); |
| |
| // Readonly Attributes. |
| bool pending() const { return !utterances_.empty(); } |
| bool speaking() const { return false; } |
| bool paused() const { return paused_; } |
| |
| // EventHandlers. |
| const EventListenerScriptValue* onvoiceschanged() const { |
| return GetAttributeEventListener(base::Tokens::voiceschanged()); |
| } |
| |
| void set_onvoiceschanged(const EventListenerScriptValue& event_listener); |
| |
| // Functions. |
| void Speak(const scoped_refptr<SpeechSynthesisUtterance>& utterance); |
| void Cancel(); |
| void Pause() { paused_ = true; } |
| void Resume(); |
| SpeechSynthesisVoiceSequence GetVoices() const { return voices_; } |
| |
| DEFINE_WRAPPABLE_TYPE(SpeechSynthesis); |
| void TraceMembers(script::Tracer* tracer) override; |
| |
| private: |
| ~SpeechSynthesis() override; |
| |
| void DispatchErrorEvent( |
| const scoped_refptr<SpeechSynthesisUtterance>& utterance, |
| SpeechSynthesisErrorCode error_code); |
| |
| bool paused_; |
| typedef std::list<scoped_refptr<SpeechSynthesisUtterance> > UtterancesList; |
| UtterancesList utterances_; |
| SpeechSynthesisVoiceSequence voices_; |
| |
| scoped_refptr<dom::Navigator> navigator_; |
| |
| DISALLOW_COPY_AND_ASSIGN(SpeechSynthesis); |
| }; |
| |
| } // namespace speech |
| } // namespace cobalt |
| |
| #endif // COBALT_SPEECH_SPEECH_SYNTHESIS_H_ |