| // Copyright 2019 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 CONTENT_COMMON_CONTENT_TO_VISIBLE_TIME_REPORTER_H_ |
| #define CONTENT_COMMON_CONTENT_TO_VISIBLE_TIME_REPORTER_H_ |
| |
| #include "base/callback.h" |
| #include "base/memory/weak_ptr.h" |
| #include "base/optional.h" |
| #include "base/time/time.h" |
| #include "content/common/content_export.h" |
| |
| namespace gfx { |
| struct PresentationFeedback; |
| } |
| |
| namespace content { |
| |
| struct CONTENT_EXPORT RecordContentToVisibleTimeRequest { |
| RecordContentToVisibleTimeRequest(); |
| ~RecordContentToVisibleTimeRequest(); |
| RecordContentToVisibleTimeRequest( |
| const RecordContentToVisibleTimeRequest& other); |
| |
| RecordContentToVisibleTimeRequest(base::TimeTicks event_start_time, |
| base::Optional<bool> destination_is_loaded, |
| base::Optional<bool> destination_is_frozen, |
| bool show_reason_tab_switching, |
| bool show_reason_unoccluded); |
| |
| // Merges two requests to include all the flags set and minimum start time. |
| void UpdateRequest(const RecordContentToVisibleTimeRequest& other); |
| |
| // The time at which web contents become visible. |
| base::TimeTicks event_start_time = base::TimeTicks(); |
| // Indicates if the destination tab is loaded when initiating the tab switch. |
| base::Optional<bool> destination_is_loaded; |
| // Indicates if the destination tab is frozen when initiating the tab switch. |
| base::Optional<bool> destination_is_frozen; |
| // If |show_reason_tab_switching| is true, web contents has become visible |
| // because of tab switching. |
| bool show_reason_tab_switching = false; |
| // If |show_reason_unoccluded| is true, then web contents has become visible |
| // because window un-occlusion has happened. |
| bool show_reason_unoccluded = false; |
| |
| // Please update RecordContentToVisibleTimeRequestTest::ExpectEqual when |
| // changing this object!!! |
| }; |
| |
| // Generates UMA metric to track the duration of tab switching from when the |
| // active tab is changed until the frame presentation time. The metric will be |
| // separated into two whether the tab switch has saved frames or not. |
| class CONTENT_EXPORT ContentToVisibleTimeReporter { |
| public: |
| // Matches the TabSwitchResult enum in enums.xml. |
| enum class TabSwitchResult { |
| // A frame was successfully presented after a tab switch. |
| kSuccess = 0, |
| // Tab was hidden before a frame was presented after a tab switch. |
| kIncomplete = 1, |
| // Compositor reported a failure after a tab switch. |
| kPresentationFailure = 2, |
| kMaxValue = kPresentationFailure, |
| }; |
| |
| ContentToVisibleTimeReporter(); |
| ~ContentToVisibleTimeReporter(); |
| |
| // Invoked when the tab associated with this recorder is shown. Returns a |
| // callback to invoke the next time a frame is presented for this tab. |
| base::OnceCallback<void(const gfx::PresentationFeedback&)> TabWasShown( |
| bool has_saved_frames, |
| const RecordContentToVisibleTimeRequest& start_state, |
| base::TimeTicks render_widget_visibility_request_timestamp); |
| |
| // Indicates that the tab associated with this recorder was hidden. If no |
| // frame was presented since the last tab switch, failure is reported to UMA. |
| void TabWasHidden(); |
| |
| private: |
| // Records histograms and trace events for the current tab switch. |
| void RecordHistogramsAndTraceEvents( |
| bool is_incomplete, |
| bool show_reason_tab_switching, |
| bool show_reason_unoccluded, |
| const gfx::PresentationFeedback& feedback); |
| |
| // Whether there was a saved frame for the last tab switch. |
| bool has_saved_frames_; |
| |
| // The information about the last tab switch request, or nullopt if there is |
| // no incomplete tab switch. |
| base::Optional<RecordContentToVisibleTimeRequest> tab_switch_start_state_; |
| |
| // The render widget visibility request timestamp for the last tab switch, or |
| // null if there is no incomplete tab switch. |
| base::TimeTicks render_widget_visibility_request_timestamp_; |
| |
| base::WeakPtrFactory<ContentToVisibleTimeReporter> weak_ptr_factory_{this}; |
| |
| DISALLOW_COPY_AND_ASSIGN(ContentToVisibleTimeReporter); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_COMMON_CONTENT_TO_VISIBLE_TIME_REPORTER_H_ |