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