ash/wm/stacking_controller.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ash/wm/stacking_controller.h"
   6
   7 #include "ash/display/display_controller.h"
   8 #include "ash/shell.h"
   9 #include "ash/shell_delegate.h"
  10 #include "ash/shell_window_ids.h"
  11 #include "ash/wm/always_on_top_controller.h"
  12 #include "ash/wm/coordinate_conversion.h"
  13 #include "ash/wm/window_properties.h"
  14 #include "ui/aura/client/aura_constants.h"
  15 #include "ui/aura/root_window.h"
  16 #include "ui/aura/window.h"
  17 #include "ui/base/ui_base_types.h"
  18
  19 namespace ash {
  20 namespace {
  21
  22 // Find a root window that matches the |bounds|. If the virtual screen
  23 // coordinates is enabled and the bounds is specified, the root window
  24 // that matches the window's bound will be used. Otherwise, it'll
  25 // return the active root window.
  26 aura::RootWindow* FindContainerRoot(const gfx::Rect& bounds) {
  27   if (bounds.x() == 0 && bounds.y() == 0 && bounds.IsEmpty())
  28     return Shell::GetActiveRootWindow();
  29   return wm::GetRootWindowMatching(bounds);
  30 }
  31
  32 aura::Window* GetContainerById(aura::RootWindow* root, int id) {
  33   return Shell::GetContainer(root, id);
  34 }
  35
  36 aura::Window* GetContainerForWindow(aura::Window* window) {
  37   aura::Window* container = window->parent();
  38   while (container && container->type() != aura::client::WINDOW_TYPE_UNKNOWN)
  39     container = container->parent();
  40   return container;
  41 }
  42
  43 bool IsSystemModal(aura::Window* window) {
  44   return window->GetProperty(aura::client::kModalKey) == ui::MODAL_TYPE_SYSTEM;
  45 }
  46
  47 bool IsWindowModal(aura::Window* window) {
  48   return window->transient_parent() &&
  49       window->GetProperty(aura::client::kModalKey) == ui::MODAL_TYPE_WINDOW;
  50 }
  51
  52 }  // namespace
  53
  54 ////////////////////////////////////////////////////////////////////////////////
  55 // StackingController, public:
  56
  57 StackingController::StackingController() {
  58 }
  59
  60 StackingController::~StackingController() {
  61 }
  62
  63 ////////////////////////////////////////////////////////////////////////////////
  64 // StackingController, aura::StackingClient implementation:
  65
  66 aura::Window* StackingController::GetDefaultParent(aura::Window* context,
  67                                                    aura::Window* window,
  68                                                    const gfx::Rect& bounds) {
  69   aura::RootWindow* target_root = NULL;
  70   if (window->transient_parent()) {
  71     // Transient window should use the same root as its transient parent.
  72     target_root = window->transient_parent()->GetRootWindow();
  73   } else {
  74     target_root = FindContainerRoot(bounds);
  75   }
  76
  77   switch (window->type()) {
  78     case aura::client::WINDOW_TYPE_NORMAL:
  79     case aura::client::WINDOW_TYPE_POPUP:
  80       if (IsSystemModal(window))
  81         return GetSystemModalContainer(target_root, window);
  82       else if (IsWindowModal(window))
  83         return GetContainerForWindow(window->transient_parent());
  84       return GetAlwaysOnTopController(target_root)->GetContainer(window);
  85     case aura::client::WINDOW_TYPE_CONTROL:
  86       return GetContainerById(
  87           target_root, internal::kShellWindowId_UnparentedControlContainer);
  88     case aura::client::WINDOW_TYPE_PANEL:
  89       return GetContainerById(target_root,
  90                               internal::kShellWindowId_PanelContainer);
  91     case aura::client::WINDOW_TYPE_MENU:
  92       return GetContainerById(
  93           target_root, internal::kShellWindowId_MenuContainer);
  94     case aura::client::WINDOW_TYPE_TOOLTIP:
  95       return GetContainerById(
  96           target_root, internal::kShellWindowId_DragImageAndTooltipContainer);
  97     default:
  98       NOTREACHED() << "Window " << window->id()
  99                    << " has unhandled type " << window->type();
 100       break;
 101   }
 102   return NULL;
 103 }
 104
 105 ////////////////////////////////////////////////////////////////////////////////
 106 // StackingController, private:
 107
 108 aura::Window* StackingController::GetSystemModalContainer(
 109     aura::RootWindow* root,
 110     aura::Window* window) const {
 111   DCHECK(IsSystemModal(window));
 112
 113   // If screen lock is not active and user session is active,
 114   // all modal windows are placed into the normal modal container.
 115   if (!Shell::GetInstance()->delegate()->IsScreenLocked() &&
 116       Shell::GetInstance()->delegate()->IsSessionStarted()) {
 117     return GetContainerById(root,
 118                             internal::kShellWindowId_SystemModalContainer);
 119   }
 120
 121   // Otherwise those that originate from LockScreen container and above are
 122   // placed in the screen lock modal container.
 123   aura::Window* lock_container =
 124       GetContainerById(root, internal::kShellWindowId_LockScreenContainer);
 125   int lock_container_id = lock_container->id();
 126   int window_container_id = window->transient_parent()->parent()->id();
 127
 128   aura::Window* container = NULL;
 129   if (window_container_id < lock_container_id) {
 130     container = GetContainerById(
 131         root, internal::kShellWindowId_SystemModalContainer);
 132   } else {
 133     container = GetContainerById(
 134         root, internal::kShellWindowId_LockSystemModalContainer);
 135   }
 136
 137   return container;
 138 }
 139
 140 // TODO(oshima): Remove this once extended desktop is on by default.
 141 internal::AlwaysOnTopController*
 142 StackingController::GetAlwaysOnTopController(aura::RootWindow* root_window) {
 143   internal::AlwaysOnTopController* controller =
 144       root_window->GetProperty(internal::kAlwaysOnTopControllerKey);
 145   if (!controller) {
 146     controller = new internal::AlwaysOnTopController;
 147     controller->SetAlwaysOnTopContainer(
 148         root_window->GetChildById(
 149             internal::kShellWindowId_AlwaysOnTopContainer));
 150     // RootWindow owns the AlwaysOnTopController object.
 151     root_window->SetProperty(internal::kAlwaysOnTopControllerKey, controller);
 152   }
 153   return controller;
 154 }
 155
 156 }  // namespace ash