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/window_tree_host_manager.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 "ash/wm/window_util.h"
  17 #include "ui/aura/window.h"
  18 #include "ui/aura/window_event_dispatcher.h"
  19 #include "ui/gfx/display.h"
  20
  21 namespace ash {
  22 namespace shell {
  23
  24 class WindowWatcher::WorkspaceWindowWatcher : public aura::WindowObserver {
  25  public:
  26   explicit WorkspaceWindowWatcher(WindowWatcher* watcher) : watcher_(watcher) {
  27   }
  28
  29   ~WorkspaceWindowWatcher() override {}
  30
  31   void OnWindowAdded(aura::Window* new_window) override {
  32     new_window->AddObserver(watcher_);
  33   }
  34
  35   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 =
  42         ash::Shell::GetContainer(root, kShellWindowId_PanelContainer);
  43     panel_container->AddObserver(watcher_);
  44
  45     aura::Window* container =
  46         Shelf::ForWindow(root)->shelf_widget()->window_container();
  47     container->AddObserver(this);
  48     for (size_t i = 0; i < container->children().size(); ++i)
  49       container->children()[i]->AddObserver(watcher_);
  50   }
  51
  52   void RootWindowRemoved(aura::Window* root) {
  53     aura::Window* panel_container =
  54         ash::Shell::GetContainer(root, kShellWindowId_PanelContainer);
  55     panel_container->RemoveObserver(watcher_);
  56
  57     aura::Window* container =
  58         Shelf::ForWindow(root)->shelf_widget()->window_container();
  59     container->RemoveObserver(this);
  60     for (size_t i = 0; i < container->children().size(); ++i)
  61       container->children()[i]->RemoveObserver(watcher_);
  62   }
  63
  64  private:
  65   WindowWatcher* watcher_;
  66
  67   DISALLOW_COPY_AND_ASSIGN(WorkspaceWindowWatcher);
  68 };
  69
  70 WindowWatcher::WindowWatcher() {
  71   workspace_window_watcher_.reset(new WorkspaceWindowWatcher(this));
  72   aura::Window::Windows root_windows = Shell::GetAllRootWindows();
  73   for (aura::Window::Windows::iterator iter = root_windows.begin();
  74        iter != root_windows.end(); ++ iter) {
  75     workspace_window_watcher_->RootWindowAdded(*iter);
  76   }
  77 }
  78
  79 WindowWatcher::~WindowWatcher() {
  80   aura::Window::Windows root_windows = Shell::GetAllRootWindows();
  81   for (aura::Window::Windows::iterator iter = root_windows.begin();
  82        iter != root_windows.end(); ++ iter) {
  83     workspace_window_watcher_->RootWindowRemoved(*iter);
  84   }
  85 }
  86
  87 aura::Window* WindowWatcher::GetWindowByID(ash::ShelfID id) {
  88   IDToWindow::const_iterator i = id_to_window_.find(id);
  89   return i != id_to_window_.end() ? i->second : NULL;
  90 }
  91
  92 // aura::WindowObserver overrides:
  93 void WindowWatcher::OnWindowAdded(aura::Window* new_window) {
  94   if (!wm::IsWindowUserPositionable(new_window))
  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()
 141                            ->window_tree_host_manager()
 142                            ->GetRootWindowForDisplayId(new_display.id());
 143   workspace_window_watcher_->RootWindowAdded(root);
 144 }
 145
 146 void WindowWatcher::OnDisplayRemoved(const gfx::Display& old_display) {
 147   // All windows in the display has already been removed, so no need to
 148   // remove observers.
 149 }
 150
 151 void WindowWatcher::OnDisplayMetricsChanged(const gfx::Display&, uint32_t) {
 152 }
 153
 154 }  // namespace shell
 155 }  // namespace ash