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content / public / browser / tts_environment_android.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_PUBLIC_BROWSER_TTS_ENVIRONMENT_ANDROID_H_
#define CONTENT_PUBLIC_BROWSER_TTS_ENVIRONMENT_ANDROID_H_
#include "base/functional/callback_forward.h"
#include "content/common/content_export.h"
namespace content {
class WebContents;
// Provides embedder specific information for text-to-speech.
class CONTENT_EXPORT TtsEnvironmentAndroid {
public:
virtual ~TtsEnvironmentAndroid() = default;
// Returns whether utterances are allowed to speak from WebContents that are
// hidden. Returning false prevents speaking utterance from hidden
// WebContents, and also stops any playing utterance if the WebContents is
// hidden.
virtual bool CanSpeakUtterancesFromHiddenWebContents() = 0;
// Returns true if speech is allowed at the current time. This is called
// right before an utterance is about to be spoken.
virtual bool CanSpeakNow() = 0;
// Sets the callback that is notified when the value of CanSpeakNow() changes.
virtual void SetCanSpeakNowChangedCallback(
base::RepeatingClosure callback) = 0;
};
} // namespace content
#endif // CONTENT_PUBLIC_BROWSER_TTS_ENVIRONMENT_ANDROID_H_