зеркало из https://github.com/mozilla/gecko-dev.git
124 строки
3.5 KiB
C++
124 строки
3.5 KiB
C++
/* vim: set shiftwidth=2 tabstop=8 autoindent cindent expandtab: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "DocumentTimeline.h"
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#include "mozilla/dom/DocumentTimelineBinding.h"
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#include "AnimationUtils.h"
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#include "nsContentUtils.h"
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#include "nsIPresShell.h"
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#include "nsPresContext.h"
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#include "nsRefreshDriver.h"
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#include "nsDOMNavigationTiming.h"
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namespace mozilla {
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namespace dom {
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NS_IMPL_CYCLE_COLLECTION_INHERITED(DocumentTimeline, AnimationTimeline,
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mDocument)
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NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(DocumentTimeline,
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AnimationTimeline)
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NS_IMPL_CYCLE_COLLECTION_TRACE_END
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(DocumentTimeline)
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NS_INTERFACE_MAP_END_INHERITING(AnimationTimeline)
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NS_IMPL_ADDREF_INHERITED(DocumentTimeline, AnimationTimeline)
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NS_IMPL_RELEASE_INHERITED(DocumentTimeline, AnimationTimeline)
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JSObject*
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DocumentTimeline::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return DocumentTimelineBinding::Wrap(aCx, this, aGivenProto);
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}
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Nullable<TimeDuration>
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DocumentTimeline::GetCurrentTime() const
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{
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return ToTimelineTime(GetCurrentTimeStamp());
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}
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TimeStamp
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DocumentTimeline::GetCurrentTimeStamp() const
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{
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nsRefreshDriver* refreshDriver = GetRefreshDriver();
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TimeStamp refreshTime = refreshDriver
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? refreshDriver->MostRecentRefresh()
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: TimeStamp();
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// Always return the same object to benefit from return-value optimization.
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TimeStamp result = !refreshTime.IsNull()
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? refreshTime
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: mLastRefreshDriverTime;
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// If we don't have a refresh driver and we've never had one use the
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// timeline's zero time.
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if (result.IsNull()) {
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nsRefPtr<nsDOMNavigationTiming> timing = mDocument->GetNavigationTiming();
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if (timing) {
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result = timing->GetNavigationStartTimeStamp();
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// Also, let this time represent the current refresh time. This way
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// we'll save it as the last refresh time and skip looking up
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// navigation timing each time.
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refreshTime = result;
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}
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}
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if (!refreshTime.IsNull()) {
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mLastRefreshDriverTime = refreshTime;
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}
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return result;
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}
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Nullable<TimeDuration>
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DocumentTimeline::ToTimelineTime(const TimeStamp& aTimeStamp) const
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{
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Nullable<TimeDuration> result; // Initializes to null
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if (aTimeStamp.IsNull()) {
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return result;
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}
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nsRefPtr<nsDOMNavigationTiming> timing = mDocument->GetNavigationTiming();
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if (MOZ_UNLIKELY(!timing)) {
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return result;
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}
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result.SetValue(aTimeStamp - timing->GetNavigationStartTimeStamp());
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return result;
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}
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TimeStamp
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DocumentTimeline::ToTimeStamp(const TimeDuration& aTimeDuration) const
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{
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TimeStamp result;
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nsRefPtr<nsDOMNavigationTiming> timing = mDocument->GetNavigationTiming();
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if (MOZ_UNLIKELY(!timing)) {
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return result;
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}
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result = timing->GetNavigationStartTimeStamp() + aTimeDuration;
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return result;
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}
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nsRefreshDriver*
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DocumentTimeline::GetRefreshDriver() const
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{
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nsIPresShell* presShell = mDocument->GetShell();
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if (MOZ_UNLIKELY(!presShell)) {
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return nullptr;
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}
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nsPresContext* presContext = presShell->GetPresContext();
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if (MOZ_UNLIKELY(!presContext)) {
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return nullptr;
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}
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return presContext->RefreshDriver();
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}
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} // namespace dom
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} // namespace mozilla
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