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// Copyright (c) 2012 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 "ash/wm/always_on_top_controller.h"
#include "ash/shell.h"
#include "ash/shell_window_ids.h"
#include "ash/wm/workspace/workspace_layout_manager.h"
#include "ui/aura/client/aura_constants.h"
#include "ui/aura/window.h"
namespace ash {
AlwaysOnTopController::AlwaysOnTopController(aura::Window* viewport)
: always_on_top_container_(viewport) {
always_on_top_container_->SetLayoutManager(
new WorkspaceLayoutManager(viewport));
// Container should be empty.
DCHECK(always_on_top_container_->children().empty());
always_on_top_container_->AddObserver(this);
}
AlwaysOnTopController::~AlwaysOnTopController() {
if (always_on_top_container_)
always_on_top_container_->RemoveObserver(this);
}
aura::Window* AlwaysOnTopController::GetContainer(aura::Window* window) const {
DCHECK(always_on_top_container_);
if (window->GetProperty(aura::client::kAlwaysOnTopKey))
return always_on_top_container_;
return Shell::GetContainer(always_on_top_container_->GetRootWindow(),
kShellWindowId_DefaultContainer);
}
void AlwaysOnTopController::OnWindowAdded(aura::Window* child) {
// Observe direct child of the containers.
if (child->parent() == always_on_top_container_)
child->AddObserver(this);
}
void AlwaysOnTopController::SetLayoutManagerForTest(
WorkspaceLayoutManager* layout_manager) {
always_on_top_container_->SetLayoutManager(layout_manager);
}
// TODO(rsadam@): Refactor so that this cast is unneeded.
WorkspaceLayoutManager* AlwaysOnTopController::GetLayoutManager() const {
return static_cast<WorkspaceLayoutManager*>(
always_on_top_container_->layout_manager());
}
void AlwaysOnTopController::OnWillRemoveWindow(aura::Window* child) {
child->RemoveObserver(this);
}
void AlwaysOnTopController::OnWindowPropertyChanged(aura::Window* window,
const void* key,
intptr_t old) {
if (key == aura::client::kAlwaysOnTopKey) {
DCHECK(window->type() == ui::wm::WINDOW_TYPE_NORMAL ||
window->type() == ui::wm::WINDOW_TYPE_POPUP);
aura::Window* container = GetContainer(window);
if (window->parent() != container)
container->AddChild(window);
}
}
void AlwaysOnTopController::OnWindowDestroyed(aura::Window* window) {
if (window == always_on_top_container_)
always_on_top_container_ = NULL;
}
} // namespace ash
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