gecko-dev/dom/ipc/TelemetryScrollProbe.cpp

95 строки
2.9 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "TelemetryScrollProbe.h"
#include "nsIDOMDocument.h" // for nsIDOMDocument
#include "nsIDOMEvent.h" // for nsIDOMEvent
#include "nsIDOMLocation.h" // for nsIDOMLocation
#include "nsIURI.h" // for nsIURI
#include "TabChild.h" // for TabChildGlobal, TabChildBase
#include "mozilla/Telemetry.h" // for mozilla::Telemetry
namespace mozilla {
namespace dom {
/* static */ void
TelemetryScrollProbe::Create(TabChildGlobal* aWebFrame)
{
nsWeakPtr webNav = do_GetWeakReference(aWebFrame->mTabChild->WebNavigation());
RefPtr<TelemetryScrollProbe> probe = new TelemetryScrollProbe(webNav);
aWebFrame->AddEventListener(NS_LITERAL_STRING("pagehide"), probe, true, false, 0);
}
already_AddRefed<nsIWebNavigation>
TelemetryScrollProbe::GetWebNavigation() const
{
nsCOMPtr<nsIWebNavigation> webNav = do_QueryReferent(mWebNav);
return webNav.forget();
}
already_AddRefed<nsIDocument>
TelemetryScrollProbe::GetDocument() const
{
nsCOMPtr<nsIDocument> result;
if (nsCOMPtr<nsIWebNavigation> webNav = GetWebNavigation()) {
nsCOMPtr<nsIDOMDocument> domDoc;
webNav->GetDocument(getter_AddRefs(domDoc));
result = do_QueryInterface(domDoc);
}
return result.forget();
}
already_AddRefed<nsIPresShell>
TelemetryScrollProbe::GetPresShell() const
{
nsCOMPtr<nsIPresShell> result;
if (nsCOMPtr<nsIDocument> doc = GetDocument()) {
result = doc->GetShell();
}
return result.forget();
}
bool
TelemetryScrollProbe::ShouldIgnore(nsIDOMEvent* aEvent) const
{
nsCOMPtr<nsIDOMEventTarget> target;
aEvent->GetTarget(getter_AddRefs(target));
nsCOMPtr<nsIDocument> targetDocument = do_QueryInterface(target);
RefPtr<nsIDocument> document = GetDocument();
return !document || targetDocument != document || nsContentUtils::IsSystemPrincipal(document->NodePrincipal());
}
NS_IMPL_ISUPPORTS(TelemetryScrollProbe, nsIDOMEventListener)
NS_IMETHODIMP
TelemetryScrollProbe::HandleEvent(nsIDOMEvent* aEvent)
{
RefPtr<nsIPresShell> presShell = GetPresShell();
if (!presShell || ShouldIgnore(aEvent)) {
return NS_OK;
}
RefPtr<nsPresContext> presContext = presShell->GetPresContext();
nscoord maxAppUnits = presContext->TelemetryScrollMaxY();
nscoord totalAppUnits = presContext->TelemetryScrollTotalY();
float maxCSSPixels = nsPresContext::AppUnitsToFloatCSSPixels(maxAppUnits);
float totalCSSPixels = nsPresContext::AppUnitsToFloatCSSPixels(totalAppUnits);
mozilla::Telemetry::Accumulate(mozilla::Telemetry::TOTAL_SCROLL_Y, totalCSSPixels);
mozilla::Telemetry::Accumulate(mozilla::Telemetry::PAGE_MAX_SCROLL_Y, maxCSSPixels);
return NS_OK;
}
} // namespace dom
} // namespace mozilla