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ash / wm / overview / cleanup_animation_observer.cc [blame]

// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "ash/wm/overview/cleanup_animation_observer.h"

#include <utility>

#include "ash/wm/overview/overview_delegate.h"
#include "ui/aura/window.h"
#include "ui/views/widget/widget.h"

namespace ash {

CleanupAnimationObserver::CleanupAnimationObserver(
    std::unique_ptr<views::Widget> widget)
    : widget_(std::move(widget)), owner_(nullptr) {
  DCHECK(widget_);

  // Mark the window as not owned by the parent to ensure that
  // `OnImplicitAnimationsCompleted()` is not called from `~Window()` and the
  // window is not deleted there.
  widget_->GetNativeWindow()->set_owned_by_parent(false);

  shell_observation_.Observe(Shell::Get());
}

CleanupAnimationObserver::~CleanupAnimationObserver() = default;

void CleanupAnimationObserver::OnImplicitAnimationsCompleted() {
  // `widget_` may get reset if `Shutdown()` is called prior to this method.
  if (!widget_) {
    return;
  }
  if (owner_) {
    owner_->RemoveAndDestroyExitAnimationObserver(this);
    return;
  }
  delete this;
}

void CleanupAnimationObserver::SetOwner(OverviewDelegate* owner) {
  owner_ = owner;
}

void CleanupAnimationObserver::Shutdown() {
  widget_.reset();
  owner_ = nullptr;
}

void CleanupAnimationObserver::OnRootWindowWillShutdown(
    aura::Window* root_window) {
  if (!widget_ || widget_->GetNativeWindow()->GetRootWindow() != root_window) {
    return;
  }
  if (owner_) {
    owner_->RemoveAndDestroyExitAnimationObserver(this);
    return;
  }
  delete this;
}

}  // namespace ash