ash/wm/maximize_mode/maximize_mode_window_state.cc

   1 // Copyright 2014 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/maximize_mode/maximize_mode_window_state.h"
   6
   7 #include "ash/display/display_controller.h"
   8 #include "ash/screen_util.h"
   9 #include "ash/shell.h"
  10 #include "ash/shell_window_ids.h"
  11 #include "ash/wm/coordinate_conversion.h"
  12 #include "ash/wm/maximize_mode/maximize_mode_window_manager.h"
  13 #include "ash/wm/window_animations.h"
  14 #include "ash/wm/window_properties.h"
  15 #include "ash/wm/window_state_delegate.h"
  16 #include "ash/wm/window_state_util.h"
  17 #include "ash/wm/window_util.h"
  18 #include "ash/wm/wm_event.h"
  19 #include "ash/wm/workspace/workspace_window_resizer.h"
  20 #include "ui/aura/client/aura_constants.h"
  21 #include "ui/aura/window.h"
  22 #include "ui/aura/window_delegate.h"
  23 #include "ui/compositor/layer.h"
  24 #include "ui/gfx/display.h"
  25 #include "ui/gfx/rect.h"
  26 #include "ui/views/view_constants_aura.h"
  27 #include "ui/views/widget/widget.h"
  28
  29 namespace ash {
  30 namespace {
  31
  32 // Returns the biggest possible size for a window which is about to be
  33 // maximized.
  34 gfx::Size GetMaximumSizeOfWindow(wm::WindowState* window_state) {
  35   DCHECK(window_state->CanMaximize() || window_state->CanResize());
  36
  37   gfx::Size workspace_size = ScreenUtil::GetMaximizedWindowBoundsInParent(
  38       window_state->window()).size();
  39
  40   aura::WindowDelegate* delegate = window_state->window()->delegate();
  41   if (!delegate)
  42     return workspace_size;
  43
  44   gfx::Size size = delegate->GetMaximumSize();
  45   if (size.IsEmpty())
  46     return workspace_size;
  47
  48   size.SetToMin(workspace_size);
  49   return size;
  50 }
  51
  52 // Returns the centered bounds of the given bounds in the work area.
  53 gfx::Rect GetCenteredBounds(const gfx::Rect& bounds_in_parent,
  54                             wm::WindowState* state_object) {
  55   gfx::Rect work_area_in_parent =
  56       ScreenUtil::GetDisplayWorkAreaBoundsInParent(state_object->window());
  57   work_area_in_parent.ClampToCenteredSize(bounds_in_parent.size());
  58   return work_area_in_parent;
  59 }
  60
  61 // Returns the maximized/full screen and/or centered bounds of a window.
  62 gfx::Rect GetBoundsInMaximizedMode(wm::WindowState* state_object) {
  63   if (state_object->IsFullscreen())
  64     return ScreenUtil::GetDisplayBoundsInParent(state_object->window());
  65
  66   gfx::Rect bounds_in_parent;
  67   // Make the window as big as possible.
  68   if (state_object->CanMaximize() || state_object->CanResize()) {
  69     bounds_in_parent.set_size(GetMaximumSizeOfWindow(state_object));
  70   } else {
  71     // We prefer the user given window dimensions over the current windows
  72     // dimensions since they are likely to be the result from some other state
  73     // object logic.
  74     if (state_object->HasRestoreBounds())
  75       bounds_in_parent = state_object->GetRestoreBoundsInParent();
  76     else
  77       bounds_in_parent = state_object->window()->bounds();
  78   }
  79   return GetCenteredBounds(bounds_in_parent, state_object);
  80 }
  81
  82 }  // namespace
  83
  84 // static
  85 void MaximizeModeWindowState::UpdateWindowPosition(
  86     wm::WindowState* window_state, bool animated) {
  87   gfx::Rect bounds_in_parent = GetBoundsInMaximizedMode(window_state);
  88
  89   if (bounds_in_parent == window_state->window()->bounds())
  90     return;
  91
  92   if (animated)
  93     window_state->SetBoundsDirect(bounds_in_parent);
  94   else
  95     window_state->SetBoundsDirectAnimated(bounds_in_parent);
  96 }
  97
  98 MaximizeModeWindowState::MaximizeModeWindowState(
  99     aura::Window* window, MaximizeModeWindowManager* creator)
 100     : window_(window),
 101       creator_(creator),
 102       current_state_type_(wm::GetWindowState(window)->GetStateType()),
 103       defer_bounds_updates_(false) {
 104   old_state_.reset(
 105       wm::GetWindowState(window)->SetStateObject(
 106           scoped_ptr<State>(this).Pass()).release());
 107 }
 108
 109 MaximizeModeWindowState::~MaximizeModeWindowState() {
 110   creator_->WindowStateDestroyed(window_);
 111 }
 112
 113 void MaximizeModeWindowState::LeaveMaximizeMode(wm::WindowState* window_state) {
 114   // Note: When we return we will destroy ourselves with the |our_reference|.
 115   scoped_ptr<wm::WindowState::State> our_reference =
 116       window_state->SetStateObject(old_state_.Pass());
 117 }
 118
 119 void MaximizeModeWindowState::SetDeferBoundsUpdates(bool defer_bounds_updates) {
 120   if (defer_bounds_updates_ == defer_bounds_updates)
 121     return;
 122
 123   defer_bounds_updates_ = defer_bounds_updates;
 124   if (!defer_bounds_updates_)
 125     UpdateBounds(wm::GetWindowState(window_), true);
 126 }
 127
 128 void MaximizeModeWindowState::OnWMEvent(wm::WindowState* window_state,
 129                                         const wm::WMEvent* event) {
 130   switch (event->type()) {
 131     case wm::WM_EVENT_TOGGLE_FULLSCREEN:
 132       ToggleFullScreen(window_state, window_state->delegate());
 133       break;
 134     case wm::WM_EVENT_FULLSCREEN:
 135       UpdateWindow(window_state, wm::WINDOW_STATE_TYPE_FULLSCREEN, true);
 136       break;
 137     case wm::WM_EVENT_TOGGLE_MAXIMIZE_CAPTION:
 138     case wm::WM_EVENT_TOGGLE_VERTICAL_MAXIMIZE:
 139     case wm::WM_EVENT_TOGGLE_HORIZONTAL_MAXIMIZE:
 140     case wm::WM_EVENT_TOGGLE_MAXIMIZE:
 141     case wm::WM_EVENT_CYCLE_SNAP_DOCK_LEFT:
 142     case wm::WM_EVENT_CYCLE_SNAP_DOCK_RIGHT:
 143     case wm::WM_EVENT_CENTER:
 144     case wm::WM_EVENT_SNAP_LEFT:
 145     case wm::WM_EVENT_SNAP_RIGHT:
 146     case wm::WM_EVENT_NORMAL:
 147     case wm::WM_EVENT_MAXIMIZE:
 148     case wm::WM_EVENT_DOCK:
 149       UpdateWindow(window_state,
 150                    GetMaximizedOrCenteredWindowType(window_state),
 151                    true);
 152       return;
 153     case wm::WM_EVENT_MINIMIZE:
 154       UpdateWindow(window_state, wm::WINDOW_STATE_TYPE_MINIMIZED, true);
 155       return;
 156     case wm::WM_EVENT_SHOW_INACTIVE:
 157       return;
 158     case wm::WM_EVENT_SET_BOUNDS:
 159       if (current_state_type_ == wm::WINDOW_STATE_TYPE_MAXIMIZED) {
 160         // Having a maximized window, it could have been created with an empty
 161         // size and the caller should get his size upon leaving the maximized
 162         // mode. As such we set the restore bounds to the requested bounds.
 163         gfx::Rect bounds_in_parent =
 164             (static_cast<const wm::SetBoundsEvent*>(event))->requested_bounds();
 165         if (!bounds_in_parent.IsEmpty())
 166           window_state->SetRestoreBoundsInParent(bounds_in_parent);
 167       } else if (current_state_type_ != wm::WINDOW_STATE_TYPE_MINIMIZED &&
 168                  current_state_type_ != wm::WINDOW_STATE_TYPE_MAXIMIZED &&
 169                  current_state_type_ != wm::WINDOW_STATE_TYPE_FULLSCREEN) {
 170         // In all other cases (except for minimized windows) we respect the
 171         // requested bounds and center it to a fully visible area on the screen.
 172         gfx::Rect bounds_in_parent =
 173             (static_cast<const wm::SetBoundsEvent*>(event))->requested_bounds();
 174         bounds_in_parent = GetCenteredBounds(bounds_in_parent, window_state);
 175         if (bounds_in_parent != window_state->window()->bounds()) {
 176           if (window_state->window()->IsVisible())
 177             window_state->SetBoundsDirectAnimated(bounds_in_parent);
 178           else
 179             window_state->SetBoundsDirect(bounds_in_parent);
 180         }
 181       }
 182       break;
 183     case wm::WM_EVENT_ADDED_TO_WORKSPACE:
 184       if (current_state_type_ != wm::WINDOW_STATE_TYPE_MAXIMIZED &&
 185           current_state_type_ != wm::WINDOW_STATE_TYPE_FULLSCREEN &&
 186           current_state_type_ != wm::WINDOW_STATE_TYPE_MINIMIZED) {
 187         wm::WindowStateType new_state =
 188             GetMaximizedOrCenteredWindowType(window_state);
 189         UpdateWindow(window_state, new_state, true);
 190       }
 191       break;
 192     case wm::WM_EVENT_WORKAREA_BOUNDS_CHANGED:
 193       if (current_state_type_ != wm::WINDOW_STATE_TYPE_MINIMIZED)
 194         UpdateBounds(window_state, true);
 195       break;
 196     case wm::WM_EVENT_DISPLAY_BOUNDS_CHANGED:
 197       // Don't animate on a screen rotation - just snap to new size.
 198       if (current_state_type_ != wm::WINDOW_STATE_TYPE_MINIMIZED)
 199         UpdateBounds(window_state, false);
 200       break;
 201   }
 202 }
 203
 204 wm::WindowStateType MaximizeModeWindowState::GetType() const {
 205   return current_state_type_;
 206 }
 207
 208 void MaximizeModeWindowState::AttachState(
 209     wm::WindowState* window_state,
 210     wm::WindowState::State* previous_state) {
 211   current_state_type_ = previous_state->GetType();
 212
 213   views::Widget* widget =
 214       views::Widget::GetWidgetForNativeWindow(window_state->window());
 215   if (widget) {
 216     gfx::Rect bounds = widget->GetRestoredBounds();
 217     if (!bounds.IsEmpty()) {
 218       // We do not want to do a session restore to our window states. Therefore
 219       // we tell the window to use the current default states instead.
 220       window_state->window()->SetProperty(ash::kRestoreShowStateOverrideKey,
 221                                           window_state->GetShowState());
 222       window_state->window()->SetProperty(ash::kRestoreBoundsOverrideKey,
 223           new gfx::Rect(widget->GetRestoredBounds()));
 224     }
 225   }
 226
 227   // Initialize the state to a good preset.
 228   if (current_state_type_ != wm::WINDOW_STATE_TYPE_MAXIMIZED &&
 229       current_state_type_ != wm::WINDOW_STATE_TYPE_MINIMIZED &&
 230       current_state_type_ != wm::WINDOW_STATE_TYPE_FULLSCREEN) {
 231     UpdateWindow(window_state,
 232                  GetMaximizedOrCenteredWindowType(window_state),
 233                  true);
 234   }
 235
 236   window_state->set_can_be_dragged(false);
 237 }
 238
 239 void MaximizeModeWindowState::DetachState(wm::WindowState* window_state) {
 240   // From now on, we can use the default session restore mechanism again.
 241   window_state->window()->ClearProperty(ash::kRestoreBoundsOverrideKey);
 242   window_state->set_can_be_dragged(true);
 243 }
 244
 245 void MaximizeModeWindowState::UpdateWindow(wm::WindowState* window_state,
 246                                            wm::WindowStateType target_state,
 247                                            bool animated) {
 248   DCHECK(target_state == wm::WINDOW_STATE_TYPE_MINIMIZED ||
 249          target_state == wm::WINDOW_STATE_TYPE_MAXIMIZED ||
 250          (target_state == wm::WINDOW_STATE_TYPE_NORMAL &&
 251               !window_state->CanMaximize()) ||
 252          target_state == wm::WINDOW_STATE_TYPE_FULLSCREEN);
 253
 254   if (target_state == wm::WINDOW_STATE_TYPE_MINIMIZED) {
 255     if (current_state_type_ == wm::WINDOW_STATE_TYPE_MINIMIZED)
 256       return;
 257
 258     current_state_type_ = target_state;
 259     ::wm::SetWindowVisibilityAnimationType(
 260         window_state->window(), WINDOW_VISIBILITY_ANIMATION_TYPE_MINIMIZE);
 261     window_state->window()->Hide();
 262     if (window_state->IsActive())
 263       window_state->Deactivate();
 264     return;
 265   }
 266
 267   if (current_state_type_ == target_state) {
 268     // If the state type did not change, update it accordingly.
 269     UpdateBounds(window_state, animated);
 270     return;
 271   }
 272
 273   const wm::WindowStateType old_state_type = current_state_type_;
 274   current_state_type_ = target_state;
 275   window_state->UpdateWindowShowStateFromStateType();
 276   window_state->NotifyPreStateTypeChange(old_state_type);
 277   UpdateBounds(window_state, animated);
 278   window_state->NotifyPostStateTypeChange(old_state_type);
 279
 280   if ((window_state->window()->TargetVisibility() ||
 281       old_state_type == wm::WINDOW_STATE_TYPE_MINIMIZED) &&
 282       !window_state->window()->layer()->visible()) {
 283     // The layer may be hidden if the window was previously minimized. Make
 284     // sure it's visible.
 285     window_state->window()->Show();
 286   }
 287 }
 288
 289 wm::WindowStateType MaximizeModeWindowState::GetMaximizedOrCenteredWindowType(
 290       wm::WindowState* window_state) {
 291   return window_state->CanMaximize() ? wm::WINDOW_STATE_TYPE_MAXIMIZED :
 292                                        wm::WINDOW_STATE_TYPE_NORMAL;
 293 }
 294
 295 void MaximizeModeWindowState::UpdateBounds(wm::WindowState* window_state,
 296                                            bool animated) {
 297   if (defer_bounds_updates_)
 298     return;
 299   gfx::Rect bounds_in_parent = GetBoundsInMaximizedMode(window_state);
 300   // If we have a target bounds rectangle, we center it and set it
 301   // accordingly.
 302   if (!bounds_in_parent.IsEmpty() &&
 303       bounds_in_parent != window_state->window()->bounds()) {
 304     if (current_state_type_ == wm::WINDOW_STATE_TYPE_MINIMIZED ||
 305         !window_state->window()->IsVisible() ||
 306         !animated) {
 307       window_state->SetBoundsDirect(bounds_in_parent);
 308     } else {
 309       // If we animate (to) maximized mode, we want to use the cross fade to
 310       // avoid flashing.
 311       if (window_state->IsMaximized())
 312         window_state->SetBoundsDirectCrossFade(bounds_in_parent);
 313       else
 314         window_state->SetBoundsDirectAnimated(bounds_in_parent);
 315     }
 316   }
 317 }
 318
 319 }  // namespace ash