tree 3cea9a3c1b8314efc605377d47778504c890ec73
parent dc6c7b1dfce430d115bf0d3cb940869fdd14b0a3
author bburg@apple.com <bburg@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1575660879 +0000
committer bburg@apple.com <bburg@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1575660879 +0000

Web Inspector: TabActivity diagnostic event should sample the active tab uniformly
https://bugs.webkit.org/show_bug.cgi?id=204531

Reviewed by Devin Rousso.

Rewrite this class to use a uniform sampling approach. Every n seconds, a timer fires and
samples what the current tab is. If the last user interaction happened up to n seconds ago,
report a TabActivity diagnostic event. Keeping with the previous implementation, samples
are taken every n=60 seconds.

To account for bias in the initial sample when Web Inspector is open, wait m seconds for
the first sample. This accounts for the time between opening Web Inspector and choosing the
desired tab. In my testing, m=10 is enough time to load Web Inspector and switch
immediately to a different tab. In that case, the initial tab would not be sampled as the
active tab even if the last user interaction (clicking tab bar) happened while the initial
tab was displayed. If the recorder's setup() method is called some time after Web Inspector is
opened, then the initial delay will shrink to ensure at least 10s has elapsed since the frontend
finished loading.

* UserInterface/Base/Main.js:
(WI.contentLoaded): Keep a timestamp of when the frontend finished loading.

* UserInterface/Controllers/TabActivityDiagnosticEventRecorder.js:
(WI.TabActivityDiagnosticEventRecorder):
(WI.TabActivityDiagnosticEventRecorder.prototype.setup):
(WI.TabActivityDiagnosticEventRecorder.prototype.teardown):
(WI.TabActivityDiagnosticEventRecorder.prototype._startInitialDelayBeforeSamplingTimer):
(WI.TabActivityDiagnosticEventRecorder.prototype._stopInitialDelayBeforeSamplingTimer):
(WI.TabActivityDiagnosticEventRecorder.prototype._startEventSamplingTimer):
(WI.TabActivityDiagnosticEventRecorder.prototype._stopEventSamplingTimer):
(WI.TabActivityDiagnosticEventRecorder.prototype._sampleCurrentTabActivity):
(WI.TabActivityDiagnosticEventRecorder.prototype._didObserveUserInteraction):
(WI.TabActivityDiagnosticEventRecorder.prototype._handleWindowFocus):
(WI.TabActivityDiagnosticEventRecorder.prototype._handleWindowBlur):
(WI.TabActivityDiagnosticEventRecorder.prototype._handleWindowKeyDown):
(WI.TabActivityDiagnosticEventRecorder.prototype._handleWindowMouseDown):
(WI.TabActivityDiagnosticEventRecorder.prototype._didInteractWithTabContent): Deleted.
(WI.TabActivityDiagnosticEventRecorder.prototype._clearTabActivityTimeout): Deleted.
(WI.TabActivityDiagnosticEventRecorder.prototype._beginTabActivityTimeout): Deleted.
(WI.TabActivityDiagnosticEventRecorder.prototype._stopTrackingTabActivity): Deleted.
(WI.TabActivityDiagnosticEventRecorder.prototype._handleTabBrowserSelectedTabContentViewDidChange): Deleted.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@253211 268f45cc-cd09-0410-ab3c-d52691b4dbfc