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// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/core/page/link_highlight.h"
#include <memory>
#include "cc/animation/animation_host.h"
#include "cc/layers/picture_layer.h"
#include "third_party/blink/public/platform/platform.h"
#include "third_party/blink/renderer/core/dom/node.h"
#include "third_party/blink/renderer/core/frame/local_frame.h"
#include "third_party/blink/renderer/core/layout/layout_object.h"
#include "third_party/blink/renderer/core/page/chrome_client.h"
#include "third_party/blink/renderer/core/page/page.h"
#include "third_party/blink/renderer/core/paint/link_highlight_impl.h"
#include "third_party/blink/renderer/platform/animation/compositor_animation_timeline.h"
namespace blink {
LinkHighlight::LinkHighlight(Page& owner) : page_(&owner) {}
LinkHighlight::~LinkHighlight() {
RemoveHighlight();
}
void LinkHighlight::Trace(Visitor* visitor) {
visitor->Trace(page_);
}
void LinkHighlight::RemoveHighlight() {
if (!impl_)
return;
if (timeline_)
timeline_->AnimationDestroyed(*impl_);
impl_.reset();
}
void LinkHighlight::ResetForPageNavigation() {
RemoveHighlight();
}
void LinkHighlight::SetTapHighlight(Node* node) {
// Always clear any existing highlight when this is invoked, even if we
// don't get a new target to highlight.
RemoveHighlight();
if (!node)
return;
DCHECK(node->GetLayoutObject());
DCHECK(!node->IsTextNode());
Color highlight_color =
node->GetLayoutObject()->StyleRef().TapHighlightColor();
// Safari documentation for -webkit-tap-highlight-color says if the
// specified color has 0 alpha, then tap highlighting is disabled.
// http://developer.apple.com/library/safari/#documentation/appleapplications/reference/safaricssref/articles/standardcssproperties.html
if (!highlight_color.Alpha())
return;
impl_ = std::make_unique<LinkHighlightImpl>(node);
if (timeline_)
timeline_->AnimationAttached(*impl_);
}
LocalFrame* LinkHighlight::MainFrame() const {
return GetPage().MainFrame() && GetPage().MainFrame()->IsLocalFrame()
? GetPage().DeprecatedLocalMainFrame()
: nullptr;
}
void LinkHighlight::StartHighlightAnimationIfNeeded() {
if (impl_)
impl_->StartHighlightAnimationIfNeeded();
if (auto* local_frame = MainFrame())
GetPage().GetChromeClient().ScheduleAnimation(local_frame->View());
}
void LinkHighlight::AnimationHostInitialized(
cc::AnimationHost& animation_host) {
animation_host_ = &animation_host;
if (Platform::Current()->IsThreadedAnimationEnabled()) {
timeline_ = std::make_unique<CompositorAnimationTimeline>();
animation_host_->AddAnimationTimeline(timeline_->GetAnimationTimeline());
}
}
void LinkHighlight::WillCloseAnimationHost() {
RemoveHighlight();
if (timeline_) {
animation_host_->RemoveAnimationTimeline(timeline_->GetAnimationTimeline());
timeline_.reset();
}
animation_host_ = nullptr;
}
bool LinkHighlight::NeedsHighlightEffectInternal(
const LayoutObject& object) const {
DCHECK(impl_);
return &object == impl_->GetLayoutObject();
}
void LinkHighlight::UpdateBeforePrePaint() {
if (impl_)
impl_->UpdateBeforePrePaint();
}
void LinkHighlight::UpdateAfterPrePaint() {
if (impl_)
impl_->UpdateAfterPrePaint();
}
void LinkHighlight::Paint(GraphicsContext& context) const {
if (impl_)
impl_->Paint(context);
}
} // namespace blink
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