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// Copyright 2019 The Cobalt Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "cobalt/layout/box_intersection_observer_module.h"
#include "base/trace_event/trace_event.h"
#include "cobalt/layout/box.h"
namespace cobalt {
namespace layout {
BoxIntersectionObserverModule::BoxIntersectionObserverModule(Box* box)
: box_(box) {}
void BoxIntersectionObserverModule::AddIntersectionObserverRoots(
IntersectionObserverRootVector&& roots) {
intersection_observer_roots_ = std::move(roots);
}
void BoxIntersectionObserverModule::AddIntersectionObserverTargets(
IntersectionObserverTargetVector&& targets) {
intersection_observer_targets_ = std::move(targets);
}
bool BoxIntersectionObserverModule::BoxContainsIntersectionObserverRoot(
const scoped_refptr<IntersectionObserverRoot>& intersection_observer_root)
const {
for (auto it = intersection_observer_roots_.begin();
it != intersection_observer_roots_.end(); ++it) {
if (*it == intersection_observer_root) {
return true;
}
}
return false;
}
void BoxIntersectionObserverModule::UpdateIntersectionObservations() {
TRACE_EVENT0(
"cobalt::layout",
"BoxIntersectionObserverModule::UpdateIntersectionObservations()");
ContainerBox* container_box = box_->AsContainerBox();
if (!container_box) {
return;
}
for (const auto& target : intersection_observer_targets_) {
target->UpdateIntersectionObservationsForTarget(container_box);
}
}
} // namespace layout
} // namespace cobalt