src/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/root_window.h"
  17 #include "ui/aura/window.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   virtual ~WorkspaceWindowWatcher() {
  29   }
  30
  31   virtual void OnWindowAdded(aura::Window* new_window) OVERRIDE {
  32     new_window->AddObserver(watcher_);
  33   }
  34
  35   virtual void OnWillRemoveWindow(aura::Window* window) OVERRIDE {
  36     DCHECK(window->children().empty());
  37     window->RemoveObserver(watcher_);
  38   }
  39
  40   void RootWindowAdded(aura::Window* root) {
  41     aura::Window* panel_container = ash::Shell::GetContainer(
  42         root,
  43         internal::kShellWindowId_PanelContainer);
  44     panel_container->AddObserver(watcher_);
  45
  46     aura::Window* container =
  47         Shelf::ForWindow(root)->shelf_widget()->window_container();
  48     container->AddObserver(this);
  49     for (size_t i = 0; i < container->children().size(); ++i)
  50       container->children()[i]->AddObserver(watcher_);
  51   }
  52
  53   void RootWindowRemoved(aura::Window* root) {
  54     aura::Window* panel_container = ash::Shell::GetContainer(
  55         root,
  56         internal::kShellWindowId_PanelContainer);
  57     panel_container->RemoveObserver(watcher_);
  58
  59     aura::Window* container =
  60         Shelf::ForWindow(root)->shelf_widget()->window_container();
  61     container->RemoveObserver(this);
  62     for (size_t i = 0; i < container->children().size(); ++i)
  63       container->children()[i]->RemoveObserver(watcher_);
  64   }
  65
  66  private:
  67   WindowWatcher* watcher_;
  68
  69   DISALLOW_COPY_AND_ASSIGN(WorkspaceWindowWatcher);
  70 };
  71
  72 WindowWatcher::WindowWatcher() {
  73   workspace_window_watcher_.reset(new WorkspaceWindowWatcher(this));
  74   aura::Window::Windows root_windows = Shell::GetAllRootWindows();
  75   for (aura::Window::Windows::iterator iter = root_windows.begin();
  76        iter != root_windows.end(); ++ iter) {
  77     workspace_window_watcher_->RootWindowAdded(*iter);
  78   }
  79 }
  80
  81 WindowWatcher::~WindowWatcher() {
  82   aura::Window::Windows root_windows = Shell::GetAllRootWindows();
  83   for (aura::Window::Windows::iterator iter = root_windows.begin();
  84        iter != root_windows.end(); ++ iter) {
  85     workspace_window_watcher_->RootWindowRemoved(*iter);
  86   }
  87 }
  88
  89 aura::Window* WindowWatcher::GetWindowByID(ash::ShelfID id) {
  90   IDToWindow::const_iterator i = id_to_window_.find(id);
  91   return i != id_to_window_.end() ? i->second : NULL;
  92 }
  93
  94 // aura::WindowObserver overrides:
  95 void WindowWatcher::OnWindowAdded(aura::Window* new_window) {
  96   if (new_window->type() != ui::wm::WINDOW_TYPE_NORMAL &&
  97       new_window->type() != ui::wm::WINDOW_TYPE_PANEL)
  98     return;
  99
 100   static int image_count = 0;
 101   ShelfModel* model = Shell::GetInstance()->shelf_model();
 102   ShelfItem item;
 103   item.type = new_window->type() == ui::wm::WINDOW_TYPE_PANEL
 104                   ? ash::TYPE_APP_PANEL
 105                   : ash::TYPE_PLATFORM_APP;
 106   ash::ShelfID id = model->next_id();
 107   id_to_window_[id] = new_window;
 108
 109   SkBitmap icon_bitmap;
 110   icon_bitmap.setConfig(SkBitmap::kARGB_8888_Config, 16, 16);
 111   icon_bitmap.allocPixels();
 112   icon_bitmap.eraseARGB(255,
 113                         image_count == 0 ? 255 : 0,
 114                         image_count == 1 ? 255 : 0,
 115                         image_count == 2 ? 255 : 0);
 116   image_count = (image_count + 1) % 3;
 117   item.image = gfx::ImageSkia(gfx::ImageSkiaRep(icon_bitmap, 1.0f));
 118
 119   model->Add(item);
 120
 121   ShelfItemDelegateManager* manager =
 122       Shell::GetInstance()->shelf_item_delegate_manager();
 123   scoped_ptr<ShelfItemDelegate> delegate(
 124       new WindowWatcherShelfItemDelegate(id, this));
 125   manager->SetShelfItemDelegate(id, delegate.Pass());
 126   SetShelfIDForWindow(id, new_window);
 127 }
 128
 129 void WindowWatcher::OnWillRemoveWindow(aura::Window* window) {
 130   for (IDToWindow::iterator i = id_to_window_.begin();
 131        i != id_to_window_.end(); ++i) {
 132     if (i->second == window) {
 133       ShelfModel* model = Shell::GetInstance()->shelf_model();
 134       int index = model->ItemIndexByID(i->first);
 135       DCHECK_NE(-1, index);
 136       model->RemoveItemAt(index);
 137       id_to_window_.erase(i);
 138       break;
 139     }
 140   }
 141 }
 142
 143 void WindowWatcher::OnDisplayBoundsChanged(const gfx::Display& display) {
 144 }
 145
 146 void WindowWatcher::OnDisplayAdded(const gfx::Display& new_display) {
 147   aura::Window* root = Shell::GetInstance()->display_controller()->
 148       GetRootWindowForDisplayId(new_display.id());
 149   workspace_window_watcher_->RootWindowAdded(root);
 150 }
 151
 152 void WindowWatcher::OnDisplayRemoved(const gfx::Display& old_display) {
 153   // All windows in the display has already been removed, so no need to
 154   // remove observers.
 155 }
 156
 157 }  // namespace shell
 158 }  // namespace ash