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SpeechSynthesis.h (2072B)

      1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim:set ts=2 sw=2 sts=2 et cindent: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #ifndef mozilla_dom_SpeechSynthesis_h
      8 #define mozilla_dom_SpeechSynthesis_h
      9 
     10 #include "SpeechSynthesisUtterance.h"
     11 #include "SpeechSynthesisVoice.h"
     12 #include "js/TypeDecls.h"
     13 #include "nsCOMPtr.h"
     14 #include "nsIObserver.h"
     15 #include "nsRefPtrHashtable.h"
     16 #include "nsString.h"
     17 #include "nsWeakReference.h"
     18 #include "nsWrapperCache.h"
     19 
     20 class nsIDOMWindow;
     21 
     22 namespace mozilla::dom {
     23 
     24 class nsSpeechTask;
     25 
     26 class SpeechSynthesis final : public DOMEventTargetHelper,
     27                              public nsIObserver,
     28                              public nsSupportsWeakReference {
     29 public:
     30  explicit SpeechSynthesis(nsPIDOMWindowInner* aParent);
     31 
     32  NS_DECL_ISUPPORTS_INHERITED
     33  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(SpeechSynthesis,
     34                                           DOMEventTargetHelper)
     35  NS_DECL_NSIOBSERVER
     36 
     37  JSObject* WrapObject(JSContext* aCx,
     38                       JS::Handle<JSObject*> aGivenProto) override;
     39 
     40  bool Pending() const;
     41 
     42  bool Speaking() const;
     43 
     44  bool Paused() const;
     45 
     46  bool HasEmptyQueue() const;
     47 
     48  void Speak(SpeechSynthesisUtterance& aUtterance);
     49 
     50  void Cancel();
     51 
     52  void Pause();
     53 
     54  void Resume();
     55 
     56  void OnEnd(const nsSpeechTask* aTask);
     57 
     58  void GetVoices(nsTArray<RefPtr<SpeechSynthesisVoice> >& aResult);
     59 
     60  void ForceEnd();
     61 
     62  IMPL_EVENT_HANDLER(voiceschanged)
     63 
     64 private:
     65  virtual ~SpeechSynthesis();
     66 
     67  void AdvanceQueue();
     68 
     69  bool HasVoices() const;
     70 
     71  bool HasSpeakingTask() const {
     72    return mCurrentTask && mCurrentTask->IsSpeaking();
     73  }
     74 
     75  nsTArray<RefPtr<SpeechSynthesisUtterance> > mSpeechQueue;
     76 
     77  RefPtr<nsSpeechTask> mCurrentTask;
     78 
     79  nsRefPtrHashtable<nsStringHashKey, SpeechSynthesisVoice> mVoiceCache;
     80 
     81  bool mHoldQueue;
     82 
     83  uint64_t mInnerID;
     84 };
     85 
     86 }  // namespace mozilla::dom
     87 #endif