| // Copyright 2017 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef AutoplayPolicy_h |
| #define AutoplayPolicy_h |
| |
| #include "bindings/core/v8/Nullable.h" |
| #include "core/CoreExport.h" |
| #include "core/dom/ExceptionCode.h" |
| #include "platform/heap/Handle.h" |
| |
| namespace blink { |
| |
| class AutoplayUmaHelper; |
| class Document; |
| class ElementVisibilityObserver; |
| class HTMLMediaElement; |
| |
| // AutoplayPolicy is the class for handles autoplay logics. |
| class AutoplayPolicy final : public GarbageCollected<AutoplayPolicy> { |
| public: |
| // Different autoplay policy types. |
| enum class Type { |
| kNoUserGestureRequired = 0, |
| // A local user gesture on the element is required. |
| kUserGestureRequired, |
| // A local user gesture on the element is required when it is in a cross |
| // origin iframe. |
| kUserGestureRequiredForCrossOrigin, |
| // The document needs to have received a user activation or received one |
| // before navigating. |
| kDocumentUserActivationRequired, |
| }; |
| |
| CORE_EXPORT static Type GetAutoplayPolicyForDocument(const Document&); |
| |
| explicit AutoplayPolicy(HTMLMediaElement*); |
| |
| void VideoWillBeDrawnToCanvas() const; |
| |
| // Called when the media element is moved to a new document. |
| void DidMoveToNewDocument(Document& old_document); |
| |
| // Stop autoplaying the video element whenever its visible. |
| // TODO(mlamouri): hide these methods from HTMLMediaElement. |
| void StopAutoplayMutedWhenVisible(); |
| |
| // Request autoplay by attribute. This method will check the autoplay |
| // restrictions and record metrics. This method can only be called once per |
| // time the readyState changes to HAVE_ENOUGH_DATA. |
| bool RequestAutoplayByAttribute(); |
| |
| // Request the playback via play() method. This method will check the autoplay |
| // restrictions and record metrics. This method can only be called once |
| // per call of play(). |
| Nullable<ExceptionCode> RequestPlay(); |
| |
| // Returns whether an umute action should pause an autoplaying element. The |
| // method will check autoplay restrictions and record metrics. This method can |
| // only be called once per call of setMuted(). |
| bool RequestAutoplayUnmute(); |
| |
| bool IsAutoplayingMuted() const; |
| |
| // Unlock user gesture if a user gesture can be utilized. |
| void TryUnlockingUserGesture(); |
| |
| // Return true if and only if a user gesture is requried for playback. Even |
| // if isLockedPendingUserGesture() return true, this might return false if |
| // the requirement is currently overridden. This does not check if a user |
| // gesture is currently being processed. |
| bool IsGestureNeededForPlayback() const; |
| |
| DECLARE_VIRTUAL_TRACE(); |
| |
| private: |
| friend class AutoplayUmaHelper; |
| friend class AutoplayUmaHelperTest; |
| |
| // Start autoplaying the video element whenever its visible. |
| void StartAutoplayMutedWhenVisible(); |
| |
| // Returns whether the media element is eligible to autoplay muted. |
| bool IsEligibleForAutoplayMuted() const; |
| |
| bool ShouldAutoplay(); |
| |
| // If the user gesture is required, then this will remove it. Note that |
| // one should not generally call this method directly; use the one on |
| // m_helper and give it a reason. |
| void UnlockUserGesture(); |
| |
| // Return true if and only if a user gesture is required to unlock this |
| // media element for unrestricted autoplay/script control. Don't confuse |
| // this with isGestureNeededForPlayback(). The latter is usually what one |
| // should use, if checking to see if an action is allowed. |
| bool IsLockedPendingUserGesture() const; |
| |
| bool IsLockedPendingUserGestureIfCrossOriginExperimentEnabled() const; |
| |
| bool IsGestureNeededForPlaybackIfCrossOriginExperimentEnabled() const; |
| |
| bool IsGestureNeededForPlaybackIfPendingUserGestureIsLocked() const; |
| |
| // Return true if and only if the settings allow autoplay of media on this |
| // frame. |
| bool IsAutoplayAllowedPerSettings() const; |
| |
| bool IsAutoplayingMutedInternal(bool muted) const; |
| |
| // Called when the video visibility changes while autoplaying muted, will |
| // pause the video when invisible and resume the video when visible. |
| void OnVisibilityChangedForAutoplay(bool is_visible); |
| |
| bool locked_pending_user_gesture_ : 1; |
| bool locked_pending_user_gesture_if_cross_origin_experiment_enabled_ : 1; |
| |
| Member<HTMLMediaElement> element_; |
| Member<ElementVisibilityObserver> autoplay_visibility_observer_; |
| |
| Member<AutoplayUmaHelper> autoplay_uma_helper_; |
| |
| DISALLOW_COPY_AND_ASSIGN(AutoplayPolicy); |
| }; |
| |
| } // namespace blink |
| |
| #endif // AutoplayPolicy_h |