blob: 2c9e920abc8ea0404b73885ee4d892c0f5900f48 [file] [log] [blame]
// 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 "ui/aura/client/aura_constants.h"
#include "ui/aura/window.h"
namespace ash {
namespace internal {
AlwaysOnTopController::AlwaysOnTopController()
: default_container_(NULL),
always_on_top_container_(NULL) {
}
AlwaysOnTopController::~AlwaysOnTopController() {
if (default_container_)
default_container_->RemoveObserver(this);
if (always_on_top_container_)
always_on_top_container_->RemoveObserver(this);
}
void AlwaysOnTopController::SetContainers(aura::Window* default_container,
aura::Window* always_on_top_container) {
// Both containers should have no children.
DCHECK(default_container->children().empty());
DCHECK(always_on_top_container->children().empty());
// We are not handling any containers yet.
DCHECK(default_container_ == NULL && always_on_top_container_ == NULL);
default_container_ = default_container;
default_container_->AddObserver(this);
always_on_top_container_ = always_on_top_container;
always_on_top_container_->AddObserver(this);
}
aura::Window* AlwaysOnTopController::GetContainer(aura::Window* window) const {
DCHECK(default_container_ && always_on_top_container_);
return !window->GetProperty(aura::client::kAlwaysOnTopKey) ?
default_container_ : always_on_top_container_;
}
void AlwaysOnTopController::OnWindowAdded(aura::Window* child) {
// Observe direct child of the containers.
if (child->parent() == default_container_ ||
child->parent() == always_on_top_container_) {
child->AddObserver(this);
}
}
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() == aura::client::WINDOW_TYPE_NORMAL ||
window->type() == aura::client::WINDOW_TYPE_POPUP);
aura::Window* container = GetContainer(window);
if (window->parent() != container)
container->AddChild(window);
}
}
void AlwaysOnTopController::OnWindowDestroyed(aura::Window* window) {
if (window == default_container_)
default_container_ = NULL;
if (window == always_on_top_container_)
always_on_top_container_ = NULL;
}
} // namespace internal
} // namespace ash