ash/shell/window_watcher.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/shell/window_watcher.h"
   6
   7 #include "ash/display/display_controller.h"
   8 #include "ash/shelf/shelf.h"
   9 #include "ash/shelf/shelf_item_delegate_manager.h"
  10 #include "ash/shelf/shelf_model.h"
  11 #include "ash/shelf/shelf_util.h"
  12 #include "ash/shelf/shelf_widget.h"
  13 #include "ash/shell.h"
  14 #include "ash/shell/window_watcher_shelf_item_delegate.h"
  15 #include "ash/shell_window_ids.h"
  16 #include "ui/aura/window.h"
  17 #include "ui/aura/window_event_dispatcher.h"
  18 #include "ui/gfx/display.h"
  19
  20 namespace ash {
  21 namespace shell {
  22
  23 class WindowWatcher::WorkspaceWindowWatcher : public aura::WindowObserver {
  24  public:
  25   explicit WorkspaceWindowWatcher(WindowWatcher* watcher) : watcher_(watcher) {
  26   }
  27
  28   ~WorkspaceWindowWatcher() override {}
  29
  30   void OnWindowAdded(aura::Window* new_window) override {
  31     new_window->AddObserver(watcher_);
  32   }
  33
  34   void OnWillRemoveWindow(aura::Window* window) override {
  35     DCHECK(window->children().empty());
  36     window->RemoveObserver(watcher_);
  37   }
  38
  39   void RootWindowAdded(aura::Window* root) {
  40     aura::Window* panel_container =
  41         ash::Shell::GetContainer(root, kShellWindowId_PanelContainer);
  42     panel_container->AddObserver(watcher_);
  43
  44     aura::Window* container =
  45         Shelf::ForWindow(root)->shelf_widget()->window_container();
  46     container->AddObserver(this);
  47     for (size_t i = 0; i < container->children().size(); ++i)
  48       container->children()[i]->AddObserver(watcher_);
  49   }
  50
  51   void RootWindowRemoved(aura::Window* root) {
  52     aura::Window* panel_container =
  53         ash::Shell::GetContainer(root, kShellWindowId_PanelContainer);
  54     panel_container->RemoveObserver(watcher_);
  55
  56     aura::Window* container =
  57         Shelf::ForWindow(root)->shelf_widget()->window_container();
  58     container->RemoveObserver(this);
  59     for (size_t i = 0; i < container->children().size(); ++i)
  60       container->children()[i]->RemoveObserver(watcher_);
  61   }
  62
  63  private:
  64   WindowWatcher* watcher_;
  65
  66   DISALLOW_COPY_AND_ASSIGN(WorkspaceWindowWatcher);
  67 };
  68
  69 WindowWatcher::WindowWatcher() {
  70   workspace_window_watcher_.reset(new WorkspaceWindowWatcher(this));
  71   aura::Window::Windows root_windows = Shell::GetAllRootWindows();
  72   for (aura::Window::Windows::iterator iter = root_windows.begin();
  73        iter != root_windows.end(); ++ iter) {
  74     workspace_window_watcher_->RootWindowAdded(*iter);
  75   }
  76 }
  77
  78 WindowWatcher::~WindowWatcher() {
  79   aura::Window::Windows root_windows = Shell::GetAllRootWindows();
  80   for (aura::Window::Windows::iterator iter = root_windows.begin();
  81        iter != root_windows.end(); ++ iter) {
  82     workspace_window_watcher_->RootWindowRemoved(*iter);
  83   }
  84 }
  85
  86 aura::Window* WindowWatcher::GetWindowByID(ash::ShelfID id) {
  87   IDToWindow::const_iterator i = id_to_window_.find(id);
  88   return i != id_to_window_.end() ? i->second : NULL;
  89 }
  90
  91 // aura::WindowObserver overrides:
  92 void WindowWatcher::OnWindowAdded(aura::Window* new_window) {
  93   if (new_window->type() != ui::wm::WINDOW_TYPE_NORMAL &&
  94       new_window->type() != ui::wm::WINDOW_TYPE_PANEL)
  95     return;
  96
  97   static int image_count = 0;
  98   ShelfModel* model = Shell::GetInstance()->shelf_model();
  99   ShelfItem item;
 100   item.type = new_window->type() == ui::wm::WINDOW_TYPE_PANEL
 101                   ? ash::TYPE_APP_PANEL
 102                   : ash::TYPE_PLATFORM_APP;
 103   ash::ShelfID id = model->next_id();
 104   id_to_window_[id] = new_window;
 105
 106   SkBitmap icon_bitmap;
 107   icon_bitmap.allocN32Pixels(16, 16);
 108   icon_bitmap.eraseARGB(255,
 109                         image_count == 0 ? 255 : 0,
 110                         image_count == 1 ? 255 : 0,
 111                         image_count == 2 ? 255 : 0);
 112   image_count = (image_count + 1) % 3;
 113   item.image = gfx::ImageSkia(gfx::ImageSkiaRep(icon_bitmap, 1.0f));
 114
 115   model->Add(item);
 116
 117   ShelfItemDelegateManager* manager =
 118       Shell::GetInstance()->shelf_item_delegate_manager();
 119   scoped_ptr<ShelfItemDelegate> delegate(
 120       new WindowWatcherShelfItemDelegate(id, this));
 121   manager->SetShelfItemDelegate(id, delegate.Pass());
 122   SetShelfIDForWindow(id, new_window);
 123 }
 124
 125 void WindowWatcher::OnWillRemoveWindow(aura::Window* window) {
 126   for (IDToWindow::iterator i = id_to_window_.begin();
 127        i != id_to_window_.end(); ++i) {
 128     if (i->second == window) {
 129       ShelfModel* model = Shell::GetInstance()->shelf_model();
 130       int index = model->ItemIndexByID(i->first);
 131       DCHECK_NE(-1, index);
 132       model->RemoveItemAt(index);
 133       id_to_window_.erase(i);
 134       break;
 135     }
 136   }
 137 }
 138
 139 void WindowWatcher::OnDisplayAdded(const gfx::Display& new_display) {
 140   aura::Window* root = Shell::GetInstance()->display_controller()->
 141       GetRootWindowForDisplayId(new_display.id());
 142   workspace_window_watcher_->RootWindowAdded(root);
 143 }
 144
 145 void WindowWatcher::OnDisplayRemoved(const gfx::Display& old_display) {
 146   // All windows in the display has already been removed, so no need to
 147   // remove observers.
 148 }
 149
 150 void WindowWatcher::OnDisplayMetricsChanged(const gfx::Display&, uint32_t) {
 151 }
 152
 153 }  // namespace shell
 154 }  // namespace ash