tenfourfox/dom/animation/EffectCompositor.cpp
Cameron Kaiser c9b2922b70 hello FPR
2017-04-19 00:56:45 -07:00

108 lines
3.1 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 "EffectCompositor.h"
#include "mozilla/dom/Animation.h"
#include "mozilla/dom/KeyframeEffect.h"
#include "mozilla/AnimationUtils.h"
#include "mozilla/EffectSet.h"
#include "nsLayoutUtils.h"
using mozilla::dom::Animation;
using mozilla::dom::KeyframeEffectReadOnly;
namespace mozilla {
// Helper function to factor out the common logic from
// GetAnimationsForCompositor and HasAnimationsForCompositor.
//
// Takes an optional array to fill with eligible animations.
//
// Returns true if there are eligible animations, false otherwise.
bool
FindAnimationsForCompositor(const nsIFrame* aFrame,
nsCSSProperty aProperty,
nsTArray<RefPtr<dom::Animation>>* aMatches /*out*/)
{
MOZ_ASSERT(!aMatches || aMatches->IsEmpty(),
"Matches array, if provided, should be empty");
EffectSet* effects = EffectSet::GetEffectSet(aFrame);
if (!effects || effects->IsEmpty()) {
return false;
}
if (aFrame->RefusedAsyncAnimation()) {
return false;
}
if (!nsLayoutUtils::AreAsyncAnimationsEnabled()) {
if (nsLayoutUtils::IsAnimationLoggingEnabled()) {
nsCString message;
message.AppendLiteral("Performance warning: Async animations are "
"disabled");
AnimationUtils::LogAsyncAnimationFailure(message);
}
return false;
}
bool foundSome = false;
for (KeyframeEffectReadOnly* effect : *effects) {
MOZ_ASSERT(effect && effect->GetAnimation());
Animation* animation = effect->GetAnimation();
if (!animation->IsPlaying()) {
continue;
}
if (effect->ShouldBlockCompositorAnimations(aFrame)) {
if (aMatches) {
aMatches->Clear();
}
return false;
}
if (!effect->HasAnimationOfProperty(aProperty)) {
continue;
}
if (aMatches) {
aMatches->AppendElement(animation);
}
foundSome = true;
}
MOZ_ASSERT(!foundSome || !aMatches || !aMatches->IsEmpty(),
"If return value is true, matches array should be non-empty");
return foundSome;
}
/* static */ bool
EffectCompositor::HasAnimationsForCompositor(const nsIFrame* aFrame,
nsCSSProperty aProperty)
{
return FindAnimationsForCompositor(aFrame, aProperty, nullptr);
}
/* static */ nsTArray<RefPtr<dom::Animation>>
EffectCompositor::GetAnimationsForCompositor(const nsIFrame* aFrame,
nsCSSProperty aProperty)
{
nsTArray<RefPtr<dom::Animation>> result;
#ifdef DEBUG
bool foundSome =
#endif
FindAnimationsForCompositor(aFrame, aProperty, &result);
MOZ_ASSERT(!foundSome || !result.IsEmpty(),
"If return value is true, matches array should be non-empty");
return result;
}
} // namespace mozilla