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content / browser / speech / tts_environment_android_impl.h [blame]
// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_SPEECH_TTS_ENVIRONMENT_ANDROID_IMPL_H_
#define CONTENT_BROWSER_SPEECH_TTS_ENVIRONMENT_ANDROID_IMPL_H_
#include <memory>
#include "base/android/application_status_listener.h"
#include "base/functional/callback.h"
#include "content/public/browser/tts_environment_android.h"
namespace content {
// Default implementation of TtsEnvironment that is used if the embedder
// doesn't supply one. This uses ApplicationStatus to stop speech when the
// application no longer has visible activities and does not allow speech
// if there are no visible activities.
class TtsEnvironmentAndroidImpl : public TtsEnvironmentAndroid {
public:
TtsEnvironmentAndroidImpl();
TtsEnvironmentAndroidImpl(const TtsEnvironmentAndroidImpl&) = delete;
TtsEnvironmentAndroidImpl& operator=(const TtsEnvironmentAndroidImpl&) =
delete;
~TtsEnvironmentAndroidImpl() override;
// TtsEnvironment:
bool CanSpeakUtterancesFromHiddenWebContents() override;
bool CanSpeakNow() override;
void SetCanSpeakNowChangedCallback(base::RepeatingClosure callback) override;
private:
void OnApplicationStateChanged(base::android::ApplicationState state);
base::RepeatingClosure can_speak_now_changed_callback_;
std::unique_ptr<base::android::ApplicationStatusListener>
application_status_listener_;
};
} // namespace content
#endif // CONTENT_BROWSER_SPEECH_TTS_ENVIRONMENT_ANDROID_IMPL_H_