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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/root_window_controller.h"
#include "ash/session_state_delegate.h"
#include "ash/shell.h"
#include "ash/shell_window_ids.h"
#include "ash/wm/always_on_top_controller.h"
#include "ash/wm/coordinate_conversion.h"
#include "ash/wm/window_state.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 {
// Find a root window that matches the |bounds|. If the virtual screen
// coordinates is enabled and the bounds is specified, the root window
// that matches the window's bound will be used. Otherwise, it'll
// return the active root window.
aura::Window* FindContainerRoot(const gfx::Rect& bounds) {
if (bounds.x() == 0 && bounds.y() == 0 && bounds.IsEmpty())
return Shell::GetTargetRootWindow();
return wm::GetRootWindowMatching(bounds);
}
aura::Window* GetContainerById(aura::Window* root, int id) {
return Shell::GetContainer(root, id);
}
bool IsSystemModal(aura::Window* window) {
return window->GetProperty(aura::client::kModalKey) == ui::MODAL_TYPE_SYSTEM;
}
bool HasTransientParentWindow(aura::Window* window) {
return window->transient_parent() &&
window->transient_parent()->type() != aura::client::WINDOW_TYPE_UNKNOWN;
}
internal::AlwaysOnTopController*
GetAlwaysOnTopController(aura::Window* root_window) {
return internal::GetRootWindowController(root_window)->
always_on_top_controller();
}
} // namespace
////////////////////////////////////////////////////////////////////////////////
// StackingController, public:
StackingController::StackingController() {
}
StackingController::~StackingController() {
}
////////////////////////////////////////////////////////////////////////////////
// StackingController, aura::client::WindowTreeClient implementation:
aura::Window* StackingController::GetDefaultParent(aura::Window* context,
aura::Window* window,
const gfx::Rect& bounds) {
aura::Window* target_root = NULL;
if (window->transient_parent()) {
// Transient window should use the same root as its transient parent.
target_root = window->transient_parent()->GetRootWindow();
} else {
target_root = FindContainerRoot(bounds);
}
switch (window->type()) {
case aura::client::WINDOW_TYPE_NORMAL:
case aura::client::WINDOW_TYPE_POPUP:
if (IsSystemModal(window))
return GetSystemModalContainer(target_root, window);
else if (HasTransientParentWindow(window))
return internal::RootWindowController::GetContainerForWindow(
window->transient_parent());
return GetAlwaysOnTopController(target_root)->GetContainer(window);
case aura::client::WINDOW_TYPE_CONTROL:
return GetContainerById(
target_root, internal::kShellWindowId_UnparentedControlContainer);
case aura::client::WINDOW_TYPE_PANEL:
if (wm::GetWindowState(window)->panel_attached())
return GetContainerById(target_root,
internal::kShellWindowId_PanelContainer);
else
return GetAlwaysOnTopController(target_root)->GetContainer(window);
case aura::client::WINDOW_TYPE_MENU:
return GetContainerById(
target_root, internal::kShellWindowId_MenuContainer);
case aura::client::WINDOW_TYPE_TOOLTIP:
return GetContainerById(
target_root, internal::kShellWindowId_DragImageAndTooltipContainer);
default:
NOTREACHED() << "Window " << window->id()
<< " has unhandled type " << window->type();
break;
}
return NULL;
}
////////////////////////////////////////////////////////////////////////////////
// StackingController, private:
aura::Window* StackingController::GetSystemModalContainer(
aura::Window* root,
aura::Window* window) const {
DCHECK(IsSystemModal(window));
// If screen lock is not active and user session is active,
// all modal windows are placed into the normal modal container.
// In case of missing transient parent (it could happen for alerts from
// background pages) assume that the window belongs to user session.
SessionStateDelegate* session_state_delegate =
Shell::GetInstance()->session_state_delegate();
if (!session_state_delegate->IsUserSessionBlocked() ||
!window->transient_parent()) {
return GetContainerById(root,
internal::kShellWindowId_SystemModalContainer);
}
// Otherwise those that originate from LockScreen container and above are
// placed in the screen lock modal container.
int window_container_id = window->transient_parent()->parent()->id();
aura::Window* container = NULL;
if (window_container_id < internal::kShellWindowId_LockScreenContainer) {
container = GetContainerById(
root, internal::kShellWindowId_SystemModalContainer);
} else {
container = GetContainerById(
root, internal::kShellWindowId_LockSystemModalContainer);
}
return container;
}
} // namespace ash
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