window_watcher.cc revision 116680a4aac90f2aa7413d9095a592090648e557 
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
20namespace ash {
21namespace shell {
22
23class 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 =
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
70WindowWatcher::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
79WindowWatcher::~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
87aura::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:
93void WindowWatcher::OnWindowAdded(aura::Window* new_window) {
94  if (new_window->type() != ui::wm::WINDOW_TYPE_NORMAL &&
95      new_window->type() != ui::wm::WINDOW_TYPE_PANEL)
96    return;
97
98  static int image_count = 0;
99  ShelfModel* model = Shell::GetInstance()->shelf_model();
100  ShelfItem item;
101  item.type = new_window->type() == ui::wm::WINDOW_TYPE_PANEL
102                  ? ash::TYPE_APP_PANEL
103                  : ash::TYPE_PLATFORM_APP;
104  ash::ShelfID id = model->next_id();
105  id_to_window_[id] = new_window;
106
107  SkBitmap icon_bitmap;
108  icon_bitmap.allocN32Pixels(16, 16);
109  icon_bitmap.eraseARGB(255,
110                        image_count == 0 ? 255 : 0,
111                        image_count == 1 ? 255 : 0,
112                        image_count == 2 ? 255 : 0);
113  image_count = (image_count + 1) % 3;
114  item.image = gfx::ImageSkia(gfx::ImageSkiaRep(icon_bitmap, 1.0f));
115
116  model->Add(item);
117
118  ShelfItemDelegateManager* manager =
119      Shell::GetInstance()->shelf_item_delegate_manager();
120  scoped_ptr<ShelfItemDelegate> delegate(
121      new WindowWatcherShelfItemDelegate(id, this));
122  manager->SetShelfItemDelegate(id, delegate.Pass());
123  SetShelfIDForWindow(id, new_window);
124}
125
126void WindowWatcher::OnWillRemoveWindow(aura::Window* window) {
127  for (IDToWindow::iterator i = id_to_window_.begin();
128       i != id_to_window_.end(); ++i) {
129    if (i->second == window) {
130      ShelfModel* model = Shell::GetInstance()->shelf_model();
131      int index = model->ItemIndexByID(i->first);
132      DCHECK_NE(-1, index);
133      model->RemoveItemAt(index);
134      id_to_window_.erase(i);
135      break;
136    }
137  }
138}
139
140void WindowWatcher::OnDisplayAdded(const gfx::Display& new_display) {
141  aura::Window* root = Shell::GetInstance()->display_controller()->
142      GetRootWindowForDisplayId(new_display.id());
143  workspace_window_watcher_->RootWindowAdded(root);
144}
145
146void 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
151void WindowWatcher::OnDisplayMetricsChanged(const gfx::Display&, uint32_t) {
152}
153
154}  // namespace shell
155}  // namespace ash
156