ash/wm/workspace/workspace_layout_manager.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/workspace/workspace_layout_manager.h"
   6
   7 #include <algorithm>
   8
   9 #include "ash/display/display_controller.h"
  10 #include "ash/root_window_controller.h"
  11 #include "ash/screen_util.h"
  12 #include "ash/session/session_state_delegate.h"
  13 #include "ash/shelf/shelf_layout_manager.h"
  14 #include "ash/shell.h"
  15 #include "ash/wm/always_on_top_controller.h"
  16 #include "ash/wm/window_animations.h"
  17 #include "ash/wm/window_positioner.h"
  18 #include "ash/wm/window_properties.h"
  19 #include "ash/wm/window_state.h"
  20 #include "ash/wm/window_util.h"
  21 #include "ash/wm/wm_event.h"
  22 #include "ash/wm/workspace/workspace_layout_manager_delegate.h"
  23 #include "ui/aura/client/aura_constants.h"
  24 #include "ui/aura/window.h"
  25 #include "ui/aura/window_observer.h"
  26 #include "ui/base/ime/input_method.h"
  27 #include "ui/base/ime/text_input_client.h"
  28 #include "ui/base/ui_base_types.h"
  29 #include "ui/compositor/layer.h"
  30 #include "ui/events/event.h"
  31 #include "ui/gfx/screen.h"
  32 #include "ui/keyboard/keyboard_controller_observer.h"
  33 #include "ui/wm/core/window_util.h"
  34 #include "ui/wm/public/activation_client.h"
  35
  36 using aura::Window;
  37
  38 namespace ash {
  39
  40 WorkspaceLayoutManager::WorkspaceLayoutManager(aura::Window* window)
  41     : shelf_(NULL),
  42       window_(window),
  43       root_window_(window->GetRootWindow()),
  44       work_area_in_parent_(ScreenUtil::ConvertRectFromScreen(
  45           window_,
  46           Shell::GetScreen()->GetDisplayNearestWindow(window_).work_area())),
  47       is_fullscreen_(GetRootWindowController(
  48           window->GetRootWindow())->GetWindowForFullscreenMode() != NULL) {
  49   Shell::GetInstance()->activation_client()->AddObserver(this);
  50   Shell::GetInstance()->AddShellObserver(this);
  51   root_window_->AddObserver(this);
  52   DCHECK(window->GetProperty(kSnapChildrenToPixelBoundary));
  53 }
  54
  55 WorkspaceLayoutManager::~WorkspaceLayoutManager() {
  56   if (root_window_)
  57     root_window_->RemoveObserver(this);
  58   for (WindowSet::const_iterator i = windows_.begin(); i != windows_.end(); ++i)
  59     (*i)->RemoveObserver(this);
  60   Shell::GetInstance()->RemoveShellObserver(this);
  61   Shell::GetInstance()->activation_client()->RemoveObserver(this);
  62 }
  63
  64 void WorkspaceLayoutManager::SetShelf(ShelfLayoutManager* shelf) {
  65   shelf_ = shelf;
  66 }
  67
  68 void WorkspaceLayoutManager::SetMaximizeBackdropDelegate(
  69     scoped_ptr<WorkspaceLayoutManagerDelegate> delegate) {
  70   backdrop_delegate_.reset(delegate.release());
  71 }
  72
  73 //////////////////////////////////////////////////////////////////////////////
  74 // WorkspaceLayoutManager, aura::LayoutManager implementation:
  75
  76 void WorkspaceLayoutManager::OnWindowAddedToLayout(Window* child) {
  77   wm::WindowState* window_state = wm::GetWindowState(child);
  78   wm::WMEvent event(wm::WM_EVENT_ADDED_TO_WORKSPACE);
  79   window_state->OnWMEvent(&event);
  80   windows_.insert(child);
  81   child->AddObserver(this);
  82   window_state->AddObserver(this);
  83   UpdateShelfVisibility();
  84   UpdateFullscreenState();
  85   if (backdrop_delegate_)
  86     backdrop_delegate_->OnWindowAddedToLayout(child);
  87   WindowPositioner::RearrangeVisibleWindowOnShow(child);
  88 }
  89
  90 void WorkspaceLayoutManager::OnWillRemoveWindowFromLayout(Window* child) {
  91   windows_.erase(child);
  92   child->RemoveObserver(this);
  93   wm::GetWindowState(child)->RemoveObserver(this);
  94
  95   if (child->TargetVisibility())
  96     WindowPositioner::RearrangeVisibleWindowOnHideOrRemove(child);
  97 }
  98
  99 void WorkspaceLayoutManager::OnWindowRemovedFromLayout(Window* child) {
 100   UpdateShelfVisibility();
 101   UpdateFullscreenState();
 102   if (backdrop_delegate_)
 103     backdrop_delegate_->OnWindowRemovedFromLayout(child);
 104 }
 105
 106 void WorkspaceLayoutManager::OnChildWindowVisibilityChanged(Window* child,
 107                                                             bool visible) {
 108   wm::WindowState* window_state = wm::GetWindowState(child);
 109   // Attempting to show a minimized window. Unminimize it.
 110   if (visible && window_state->IsMinimized())
 111     window_state->Unminimize();
 112
 113   if (child->TargetVisibility())
 114     WindowPositioner::RearrangeVisibleWindowOnShow(child);
 115   else
 116     WindowPositioner::RearrangeVisibleWindowOnHideOrRemove(child);
 117   UpdateFullscreenState();
 118   UpdateShelfVisibility();
 119   if (backdrop_delegate_)
 120     backdrop_delegate_->OnChildWindowVisibilityChanged(child, visible);
 121 }
 122
 123 void WorkspaceLayoutManager::SetChildBounds(
 124     Window* child,
 125     const gfx::Rect& requested_bounds) {
 126   wm::WindowState* window_state = wm::GetWindowState(child);
 127   wm::SetBoundsEvent event(wm::WM_EVENT_SET_BOUNDS, requested_bounds);
 128   window_state->OnWMEvent(&event);
 129   UpdateShelfVisibility();
 130 }
 131
 132 //////////////////////////////////////////////////////////////////////////////
 133 // WorkspaceLayoutManager, keyboard::KeyboardControllerObserver implementation:
 134
 135 void WorkspaceLayoutManager::OnKeyboardBoundsChanging(
 136     const gfx::Rect& new_bounds) {
 137   ui::InputMethod* input_method =
 138       root_window_->GetProperty(aura::client::kRootWindowInputMethodKey);
 139   ui::TextInputClient* text_input_client = input_method->GetTextInputClient();
 140   if (!text_input_client)
 141     return;
 142   aura::Window *window =
 143       text_input_client->GetAttachedWindow()->GetToplevelWindow();
 144   if (!window || !window_->Contains(window))
 145     return;
 146   wm::WindowState* window_state = wm::GetWindowState(window);
 147   if (!new_bounds.IsEmpty()) {
 148     // Store existing bounds to be restored before resizing for keyboard if it
 149     // is not already stored.
 150     if (!window_state->HasRestoreBounds())
 151       window_state->SaveCurrentBoundsForRestore();
 152
 153     gfx::Rect window_bounds = ScreenUtil::ConvertRectToScreen(
 154         window_,
 155         window->GetTargetBounds());
 156     gfx::Rect intersect = gfx::IntersectRects(window_bounds, new_bounds);
 157     int shift = std::min(intersect.height(),
 158                          window->bounds().y() - work_area_in_parent_.y());
 159     if (shift > 0) {
 160       gfx::Point origin(window->bounds().x(), window->bounds().y() - shift);
 161       SetChildBounds(window, gfx::Rect(origin, window->bounds().size()));
 162     }
 163   } else if (window_state->HasRestoreBounds()) {
 164     // Keyboard hidden, restore original bounds if they exist.
 165     window_state->SetAndClearRestoreBounds();
 166   }
 167 }
 168
 169 //////////////////////////////////////////////////////////////////////////////
 170 // WorkspaceLayoutManager, ash::ShellObserver implementation:
 171
 172 void WorkspaceLayoutManager::OnDisplayWorkAreaInsetsChanged() {
 173   const gfx::Rect work_area(ScreenUtil::ConvertRectFromScreen(
 174       window_,
 175       Shell::GetScreen()->GetDisplayNearestWindow(window_).work_area()));
 176   if (work_area != work_area_in_parent_) {
 177     const wm::WMEvent event(wm::WM_EVENT_WORKAREA_BOUNDS_CHANGED);
 178     AdjustAllWindowsBoundsForWorkAreaChange(&event);
 179   }
 180   if (backdrop_delegate_)
 181     backdrop_delegate_->OnDisplayWorkAreaInsetsChanged();
 182 }
 183
 184 //////////////////////////////////////////////////////////////////////////////
 185 // WorkspaceLayoutManager, aura::WindowObserver implementation:
 186
 187 void WorkspaceLayoutManager::OnWindowHierarchyChanged(
 188     const WindowObserver::HierarchyChangeParams& params) {
 189   if (!wm::GetWindowState(params.target)->IsActive())
 190     return;
 191   // If the window is already tracked by the workspace this update would be
 192   // redundant as the fullscreen and shelf state would have been handled in
 193   // OnWindowAddedToLayout.
 194   if (windows_.find(params.target) != windows_.end())
 195     return;
 196
 197   // If the active window has moved to this root window then update the
 198   // fullscreen state.
 199   // TODO(flackr): Track the active window leaving this root window and update
 200   // the fullscreen state accordingly.
 201   if (params.new_parent && params.new_parent->GetRootWindow() == root_window_) {
 202     UpdateFullscreenState();
 203     UpdateShelfVisibility();
 204   }
 205 }
 206
 207 void WorkspaceLayoutManager::OnWindowPropertyChanged(Window* window,
 208                                                      const void* key,
 209                                                      intptr_t old) {
 210   if (key == aura::client::kAlwaysOnTopKey &&
 211       window->GetProperty(aura::client::kAlwaysOnTopKey)) {
 212     GetRootWindowController(window->GetRootWindow())->
 213         always_on_top_controller()->GetContainer(window)->AddChild(window);
 214   }
 215 }
 216
 217 void WorkspaceLayoutManager::OnWindowStackingChanged(aura::Window* window) {
 218   UpdateShelfVisibility();
 219   UpdateFullscreenState();
 220   if (backdrop_delegate_)
 221     backdrop_delegate_->OnWindowStackingChanged(window);
 222 }
 223
 224 void WorkspaceLayoutManager::OnWindowDestroying(aura::Window* window) {
 225   if (root_window_ == window) {
 226     root_window_->RemoveObserver(this);
 227     root_window_ = NULL;
 228   }
 229 }
 230
 231 void WorkspaceLayoutManager::OnWindowBoundsChanged(aura::Window* window,
 232                                               const gfx::Rect& old_bounds,
 233                                               const gfx::Rect& new_bounds) {
 234   if (root_window_ == window) {
 235     const wm::WMEvent wm_event(wm::WM_EVENT_DISPLAY_BOUNDS_CHANGED);
 236     AdjustAllWindowsBoundsForWorkAreaChange(&wm_event);
 237   }
 238 }
 239
 240 //////////////////////////////////////////////////////////////////////////////
 241 // WorkspaceLayoutManager,
 242 // aura::client::ActivationChangeObserver implementation:
 243
 244 void WorkspaceLayoutManager::OnWindowActivated(aura::Window* gained_active,
 245                                                aura::Window* lost_active) {
 246   wm::WindowState* window_state = wm::GetWindowState(gained_active);
 247   if (window_state && window_state->IsMinimized() &&
 248       !gained_active->IsVisible()) {
 249     window_state->Unminimize();
 250     DCHECK(!window_state->IsMinimized());
 251   }
 252   UpdateFullscreenState();
 253   UpdateShelfVisibility();
 254 }
 255
 256 //////////////////////////////////////////////////////////////////////////////
 257 // WorkspaceLayoutManager, wm::WindowStateObserver implementation:
 258
 259 void WorkspaceLayoutManager::OnPostWindowStateTypeChange(
 260     wm::WindowState* window_state,
 261     wm::WindowStateType old_type) {
 262
 263   // Notify observers that fullscreen state may be changing.
 264   if (window_state->IsFullscreen() ||
 265       old_type == wm::WINDOW_STATE_TYPE_FULLSCREEN) {
 266     UpdateFullscreenState();
 267   }
 268
 269   UpdateShelfVisibility();
 270   if (backdrop_delegate_)
 271     backdrop_delegate_->OnPostWindowStateTypeChange(window_state, old_type);
 272 }
 273
 274 //////////////////////////////////////////////////////////////////////////////
 275 // WorkspaceLayoutManager, private:
 276
 277 void WorkspaceLayoutManager::AdjustAllWindowsBoundsForWorkAreaChange(
 278     const wm::WMEvent* event) {
 279   DCHECK(event->type() == wm::WM_EVENT_DISPLAY_BOUNDS_CHANGED ||
 280          event->type() == wm::WM_EVENT_WORKAREA_BOUNDS_CHANGED);
 281
 282   work_area_in_parent_ = ScreenUtil::ConvertRectFromScreen(
 283       window_,
 284       Shell::GetScreen()->GetDisplayNearestWindow(window_).work_area());
 285
 286   // Don't do any adjustments of the insets while we are in screen locked mode.
 287   // This would happen if the launcher was auto hidden before the login screen
 288   // was shown and then gets shown when the login screen gets presented.
 289   if (event->type() == wm::WM_EVENT_WORKAREA_BOUNDS_CHANGED &&
 290       Shell::GetInstance()->session_state_delegate()->IsScreenLocked())
 291     return;
 292
 293   // If a user plugs an external display into a laptop running Aura the
 294   // display size will change.  Maximized windows need to resize to match.
 295   // We also do this when developers running Aura on a desktop manually resize
 296   // the host window.
 297   // We also need to do this when the work area insets changes.
 298   for (WindowSet::const_iterator it = windows_.begin();
 299        it != windows_.end();
 300        ++it) {
 301     wm::GetWindowState(*it)->OnWMEvent(event);
 302   }
 303 }
 304
 305 void WorkspaceLayoutManager::UpdateShelfVisibility() {
 306   if (shelf_)
 307     shelf_->UpdateVisibilityState();
 308 }
 309
 310 void WorkspaceLayoutManager::UpdateFullscreenState() {
 311   // TODO(flackr): The fullscreen state is currently tracked per workspace
 312   // but the shell notification implies a per root window state. Currently
 313   // only windows in the default workspace container will go fullscreen but
 314   // this should really be tracked by the RootWindowController since
 315   // technically any container could get a fullscreen window.
 316   if (!shelf_)
 317     return;
 318   bool is_fullscreen = GetRootWindowController(
 319       window_->GetRootWindow())->GetWindowForFullscreenMode() != NULL;
 320   if (is_fullscreen != is_fullscreen_) {
 321     ash::Shell::GetInstance()->NotifyFullscreenStateChange(
 322         is_fullscreen, window_->GetRootWindow());
 323     is_fullscreen_ = is_fullscreen;
 324   }
 325 }
 326
 327 }  // namespace ash