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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/stacking_controller.h"
#include "ash/shell.h"
#include "ash/shell_window_ids.h"
#include "ash/wm/always_on_top_controller.h"
#include "ash/wm/window_properties.h"
#include "ui/aura/client/aura_constants.h"
#include "ui/aura/root_window.h"
#include "ui/aura/window.h"
#include "ui/base/ui_base_types.h"
namespace ash {
namespace internal {
namespace {
aura::Window* GetContainerById(int id) {
return Shell::GetContainer(Shell::GetActiveRootWindow(), id);
}
aura::Window* GetContainerForWindow(aura::Window* window) {
aura::Window* container = window->parent();
while (container && container->type() != aura::client::WINDOW_TYPE_UNKNOWN)
container = container->parent();
return container;
}
bool IsSystemModal(aura::Window* window) {
return window->GetProperty(aura::client::kModalKey) == ui::MODAL_TYPE_SYSTEM;
}
bool IsWindowModal(aura::Window* window) {
return window->transient_parent() &&
window->GetProperty(aura::client::kModalKey) == ui::MODAL_TYPE_WINDOW;
}
} // namespace
////////////////////////////////////////////////////////////////////////////////
// StackingController, public:
StackingController::StackingController() {
aura::client::SetStackingClient(this);
}
StackingController::~StackingController() {
}
////////////////////////////////////////////////////////////////////////////////
// StackingController, aura::StackingClient implementation:
aura::Window* StackingController::GetDefaultParent(aura::Window* window) {
switch (window->type()) {
case aura::client::WINDOW_TYPE_NORMAL:
case aura::client::WINDOW_TYPE_POPUP:
if (IsSystemModal(window))
return GetSystemModalContainer(window);
else if (IsWindowModal(window))
return GetContainerForWindow(window->transient_parent());
return GetAlwaysOnTopController()->GetContainer(window);
case aura::client::WINDOW_TYPE_PANEL:
return GetContainerById(internal::kShellWindowId_PanelContainer);
case aura::client::WINDOW_TYPE_MENU:
return GetContainerById(internal::kShellWindowId_MenuContainer);
case aura::client::WINDOW_TYPE_TOOLTIP:
return GetContainerById(
internal::kShellWindowId_DragImageAndTooltipContainer);
case aura::client::WINDOW_TYPE_CONTROL:
return GetContainerById(
internal::kShellWindowId_UnparentedControlContainer);
default:
NOTREACHED() << "Window " << window->id()
<< " has unhandled type " << window->type();
break;
}
return NULL;
}
////////////////////////////////////////////////////////////////////////////////
// StackingController, private:
aura::Window* StackingController::GetSystemModalContainer(
aura::Window* window) const {
if (!IsSystemModal(window))
return NULL;
// If screen lock is not active, all modal windows are placed into the
// normal modal container.
aura::Window* lock_container =
GetContainerById(internal::kShellWindowId_LockScreenContainer);
if (!lock_container->children().size())
return GetContainerById(internal::kShellWindowId_SystemModalContainer);
// Otherwise those that originate from LockScreen container and above are
// placed in the screen lock modal container.
int lock_container_id = lock_container->id();
int window_container_id = window->transient_parent()->parent()->id();
aura::Window* container = NULL;
if (window_container_id < lock_container_id) {
container = GetContainerById(
internal::kShellWindowId_SystemModalContainer);
} else {
container = GetContainerById(
internal::kShellWindowId_LockSystemModalContainer);
}
return container;
}
internal::AlwaysOnTopController*
StackingController::GetAlwaysOnTopController() {
aura::RootWindow* root_window = Shell::GetActiveRootWindow();
internal::AlwaysOnTopController* controller =
root_window->GetProperty(internal::kAlwaysOnTopControllerKey);
if (!controller) {
controller = new internal::AlwaysOnTopController;
controller->SetContainers(
root_window->GetChildById(internal::kShellWindowId_DefaultContainer),
root_window->GetChildById(
internal::kShellWindowId_AlwaysOnTopContainer));
// RootWindow owns the AlwaysOnTopController object.
root_window->SetProperty(kAlwaysOnTopControllerKey, controller);
}
return controller;
}
} // namespace internal
} // namespace ash
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