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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/picture_in_picture/scoped_picture_in_picture_occlusion_observation.h"
#include "chrome/browser/picture_in_picture/picture_in_picture_occlusion_observer.h"
#include "chrome/browser/picture_in_picture/picture_in_picture_occlusion_tracker.h"
#include "chrome/browser/picture_in_picture/picture_in_picture_occlusion_tracker_observer.h"
#include "chrome/browser/picture_in_picture/picture_in_picture_window_manager.h"
ScopedPictureInPictureOcclusionObservation::
ScopedPictureInPictureOcclusionObservation(
PictureInPictureOcclusionObserver* occlusion_observer)
: occlusion_observer_(occlusion_observer) {
CHECK(occlusion_observer_);
}
ScopedPictureInPictureOcclusionObservation::
~ScopedPictureInPictureOcclusionObservation() {
// Ensure `observation_` is destroyed before `observer_`.
observation_.reset();
observer_.reset();
}
void ScopedPictureInPictureOcclusionObservation::Observe(
views::Widget* widget) {
PictureInPictureOcclusionTracker* tracker =
PictureInPictureWindowManager::GetInstance()->GetOcclusionTracker();
if (!tracker) {
return;
}
// If there's an existing observation, we need to ensure the old
// `observation_` is destroyed before the old `observer_`. We also need to
// reset the `widget_observation_` since a base::ScopedObservation requires a
// reset before observing again.
observation_.reset();
observer_.reset();
widget_observation_.Reset();
observer_ = std::make_unique<PictureInPictureOcclusionTrackerObserver>(
widget, occlusion_observer_);
observation_ = std::make_unique<
base::ScopedObservation<PictureInPictureOcclusionTracker,
PictureInPictureOcclusionTrackerObserver>>(
observer_.get());
widget_observation_.Observe(widget);
observation_->Observe(tracker);
}
void ScopedPictureInPictureOcclusionObservation::OnWidgetDestroying(
views::Widget* widget) {
widget_observation_.Reset();
observation_.reset();
observer_.reset();
}
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