// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef IOS_CHROME_BROWSER_METRICS_MODEL_TAB_USAGE_RECORDER_METRICS_H_
#define IOS_CHROME_BROWSER_METRICS_MODEL_TAB_USAGE_RECORDER_METRICS_H_
namespace tab_usage_recorder {
// Histogram names (visible for testing only).
// The name of the histogram that records the state of the selected tab
// (i.e. the tab being switched to).
extern const char kSelectedTabHistogramName[];
// The name of the histogram that records the number of page loads before an
// evicted tab is selected.
extern const char kPageLoadsBeforeEvictedTabSelected[];
// The name of the histogram that records time intervals between restores of
// previously-evicted tabs. The first restore seen in a session will record the
// time since the session started.
extern const char kTimeBetweenRestores[];
// The name of the histogram that records time intervals between the last
// restore of a previously-evicted tab and the end of the session.
extern const char kTimeAfterLastRestore[];
// Name of histogram to record the number of alive renderers when a renderer
// termination is received.
extern const char kRendererTerminationAliveRenderers[];
// Name of the histogram to record the total number of tabs when a renderer
// termination is received.
extern const char kRendererTerminationTotalTabCount[];
// Name of histogram to record the number of renderers that were alive shortly
// before a renderer termination. This metric is being recorded in case the OS
// kills renderers in batches.
extern const char kRendererTerminationRecentlyAliveRenderers[];
// Name of histogram for recording the state of the tab when the renderer is
// terminated.
extern const char kRendererTerminationStateHistogram[];
// The recently alive renderer count metric counts all renderers that were alive
// x seconds before a renderer termination. `kSecondsBeforeRendererTermination`
// specifies x.
extern const int kSecondsBeforeRendererTermination;
// enum for
// kSelectedTabHistogramName[] = "Tab.StatusWhenSwitchedBackToForeground"
// histogram.
enum TabStateWhenSelected {
IN_MEMORY = 0, // Memory resident
EVICTED = 1, // Evicted and reloaded
EVICTED_DUE_TO_COLD_START = 2, // Reloaded due to cold start
PARTIALLY_EVICTED =
3, // Partially evicted (Currently, used only by Android.)
EVICTED_DUE_TO_BACKGROUNDING =
4, // Reloaded due to backgrounding (Deprecated)
EVICTED_DUE_TO_INCOGNITO = 5, // Reloaded due to incognito
RELOADED_DUE_TO_COLD_START_FG_TAB_ON_START =
6, // Reloaded due to cold start (fg tab on start) (Android)
RELOADED_DUE_TO_COLD_START_BG_TAB_ON_SWITCH =
7, // Reloaded due to cold start (bg tab on switch) (Android)
LAZY_LOAD_FOR_OPEN_IN_NEW_TAB =
8, // Lazy load for 'Open in new tab' (Android)
STOPPED_DUE_TO_LOADING_WHEN_BACKGROUNDING =
9, // Stopped due to page loading when backgrounding (Deprecated)
EVICTED_DUE_TO_LOADING_WHEN_BACKGROUNDING =
10, // Evicted due to page loading when backgrounding (Deprecated)
EVICTED_DUE_TO_RENDERER_TERMINATION =
11, // Evicted due to OS terminating the renderer
TAB_STATE_COUNT = 12,
};
enum LoadDoneState {
LOAD_FAILURE,
LOAD_SUCCESS,
LOAD_DONE_STATE_COUNT,
};
enum EvictedTabUserBehavior {
USER_WAITED,
USER_DID_NOT_WAIT,
USER_LEFT_CHROME,
USER_BEHAVIOR_COUNT,
};
// Enum corresponding to UMA's TabForegroundState, for
// Tab.StateAtRendererTermination. Must be kept in sync with the UMA enum.
enum RendererTerminationTabState {
// These two values are for when the app is in the foreground.
FOREGROUND_TAB_FOREGROUND_APP = 0,
BACKGROUND_TAB_FOREGROUND_APP,
// These are for when the app is in the background or inactive.
FOREGROUND_TAB_BACKGROUND_APP,
BACKGROUND_TAB_BACKGROUND_APP,
TERMINATION_TAB_STATE_COUNT
};
} // namespace tab_usage_recorder
#endif // IOS_CHROME_BROWSER_METRICS_MODEL_TAB_USAGE_RECORDER_METRICS_H_
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