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/geometry/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) {
  87   gfx::Rect bounds_in_parent = GetBoundsInMaximizedMode(window_state);
  88   if (bounds_in_parent == window_state->window()->bounds())
  89     return;
  90   window_state->SetBoundsDirect(bounds_in_parent);
  91 }
  92
  93 MaximizeModeWindowState::MaximizeModeWindowState(
  94     aura::Window* window, MaximizeModeWindowManager* creator)
  95     : window_(window),
  96       creator_(creator),
  97       current_state_type_(wm::GetWindowState(window)->GetStateType()),
  98       defer_bounds_updates_(false) {
  99   old_state_.reset(
 100       wm::GetWindowState(window)->SetStateObject(
 101           scoped_ptr<State>(this).Pass()).release());
 102 }
 103
 104 MaximizeModeWindowState::~MaximizeModeWindowState() {
 105   creator_->WindowStateDestroyed(window_);
 106 }
 107
 108 void MaximizeModeWindowState::LeaveMaximizeMode(wm::WindowState* window_state) {
 109   // Note: When we return we will destroy ourselves with the |our_reference|.
 110   scoped_ptr<wm::WindowState::State> our_reference =
 111       window_state->SetStateObject(old_state_.Pass());
 112 }
 113
 114 void MaximizeModeWindowState::SetDeferBoundsUpdates(bool defer_bounds_updates) {
 115   if (defer_bounds_updates_ == defer_bounds_updates)
 116     return;
 117
 118   defer_bounds_updates_ = defer_bounds_updates;
 119   if (!defer_bounds_updates_)
 120     UpdateBounds(wm::GetWindowState(window_), true);
 121 }
 122
 123 void MaximizeModeWindowState::OnWMEvent(wm::WindowState* window_state,
 124                                         const wm::WMEvent* event) {
 125   switch (event->type()) {
 126     case wm::WM_EVENT_TOGGLE_FULLSCREEN:
 127       ToggleFullScreen(window_state, window_state->delegate());
 128       break;
 129     case wm::WM_EVENT_FULLSCREEN:
 130       UpdateWindow(window_state, wm::WINDOW_STATE_TYPE_FULLSCREEN, true);
 131       break;
 132     case wm::WM_EVENT_TOGGLE_MAXIMIZE_CAPTION:
 133     case wm::WM_EVENT_TOGGLE_VERTICAL_MAXIMIZE:
 134     case wm::WM_EVENT_TOGGLE_HORIZONTAL_MAXIMIZE:
 135     case wm::WM_EVENT_TOGGLE_MAXIMIZE:
 136     case wm::WM_EVENT_CYCLE_SNAP_DOCK_LEFT:
 137     case wm::WM_EVENT_CYCLE_SNAP_DOCK_RIGHT:
 138     case wm::WM_EVENT_CENTER:
 139     case wm::WM_EVENT_SNAP_LEFT:
 140     case wm::WM_EVENT_SNAP_RIGHT:
 141     case wm::WM_EVENT_NORMAL:
 142     case wm::WM_EVENT_MAXIMIZE:
 143     case wm::WM_EVENT_DOCK:
 144       UpdateWindow(window_state,
 145                    GetMaximizedOrCenteredWindowType(window_state),
 146                    true);
 147       return;
 148     case wm::WM_EVENT_MINIMIZE:
 149       UpdateWindow(window_state, wm::WINDOW_STATE_TYPE_MINIMIZED, true);
 150       return;
 151     case wm::WM_EVENT_SHOW_INACTIVE:
 152       return;
 153     case wm::WM_EVENT_SET_BOUNDS:
 154       if (current_state_type_ == wm::WINDOW_STATE_TYPE_MAXIMIZED) {
 155         // Having a maximized window, it could have been created with an empty
 156         // size and the caller should get his size upon leaving the maximized
 157         // mode. As such we set the restore bounds to the requested bounds.
 158         gfx::Rect bounds_in_parent =
 159             (static_cast<const wm::SetBoundsEvent*>(event))->requested_bounds();
 160         if (!bounds_in_parent.IsEmpty())
 161           window_state->SetRestoreBoundsInParent(bounds_in_parent);
 162       } else if (current_state_type_ != wm::WINDOW_STATE_TYPE_MINIMIZED &&
 163                  current_state_type_ != wm::WINDOW_STATE_TYPE_MAXIMIZED &&
 164                  current_state_type_ != wm::WINDOW_STATE_TYPE_FULLSCREEN) {
 165         // In all other cases (except for minimized windows) we respect the
 166         // requested bounds and center it to a fully visible area on the screen.
 167         gfx::Rect bounds_in_parent =
 168             (static_cast<const wm::SetBoundsEvent*>(event))->requested_bounds();
 169         bounds_in_parent = GetCenteredBounds(bounds_in_parent, window_state);
 170         if (bounds_in_parent != window_state->window()->bounds()) {
 171           if (window_state->window()->IsVisible())
 172             window_state->SetBoundsDirectAnimated(bounds_in_parent);
 173           else
 174             window_state->SetBoundsDirect(bounds_in_parent);
 175         }
 176       }
 177       break;
 178     case wm::WM_EVENT_ADDED_TO_WORKSPACE:
 179       if (current_state_type_ != wm::WINDOW_STATE_TYPE_MAXIMIZED &&
 180           current_state_type_ != wm::WINDOW_STATE_TYPE_FULLSCREEN &&
 181           current_state_type_ != wm::WINDOW_STATE_TYPE_MINIMIZED) {
 182         wm::WindowStateType new_state =
 183             GetMaximizedOrCenteredWindowType(window_state);
 184         UpdateWindow(window_state, new_state, true);
 185       }
 186       break;
 187     case wm::WM_EVENT_WORKAREA_BOUNDS_CHANGED:
 188       if (current_state_type_ != wm::WINDOW_STATE_TYPE_MINIMIZED)
 189         UpdateBounds(window_state, true);
 190       break;
 191     case wm::WM_EVENT_DISPLAY_BOUNDS_CHANGED:
 192       // Don't animate on a screen rotation - just snap to new size.
 193       if (current_state_type_ != wm::WINDOW_STATE_TYPE_MINIMIZED)
 194         UpdateBounds(window_state, false);
 195       break;
 196   }
 197 }
 198
 199 wm::WindowStateType MaximizeModeWindowState::GetType() const {
 200   return current_state_type_;
 201 }
 202
 203 void MaximizeModeWindowState::AttachState(
 204     wm::WindowState* window_state,
 205     wm::WindowState::State* previous_state) {
 206   current_state_type_ = previous_state->GetType();
 207
 208   views::Widget* widget =
 209       views::Widget::GetWidgetForNativeWindow(window_state->window());
 210   if (widget) {
 211     gfx::Rect bounds = widget->GetRestoredBounds();
 212     if (!bounds.IsEmpty()) {
 213       // We do not want to do a session restore to our window states. Therefore
 214       // we tell the window to use the current default states instead.
 215       window_state->window()->SetProperty(ash::kRestoreShowStateOverrideKey,
 216                                           window_state->GetShowState());
 217       window_state->window()->SetProperty(ash::kRestoreBoundsOverrideKey,
 218           new gfx::Rect(widget->GetRestoredBounds()));
 219     }
 220   }
 221
 222   // Initialize the state to a good preset.
 223   if (current_state_type_ != wm::WINDOW_STATE_TYPE_MAXIMIZED &&
 224       current_state_type_ != wm::WINDOW_STATE_TYPE_MINIMIZED &&
 225       current_state_type_ != wm::WINDOW_STATE_TYPE_FULLSCREEN) {
 226     UpdateWindow(window_state,
 227                  GetMaximizedOrCenteredWindowType(window_state),
 228                  true);
 229   }
 230
 231   window_state->set_can_be_dragged(false);
 232 }
 233
 234 void MaximizeModeWindowState::DetachState(wm::WindowState* window_state) {
 235   // From now on, we can use the default session restore mechanism again.
 236   window_state->window()->ClearProperty(ash::kRestoreBoundsOverrideKey);
 237   window_state->set_can_be_dragged(true);
 238 }
 239
 240 void MaximizeModeWindowState::UpdateWindow(wm::WindowState* window_state,
 241                                            wm::WindowStateType target_state,
 242                                            bool animated) {
 243   DCHECK(target_state == wm::WINDOW_STATE_TYPE_MINIMIZED ||
 244          target_state == wm::WINDOW_STATE_TYPE_MAXIMIZED ||
 245          (target_state == wm::WINDOW_STATE_TYPE_NORMAL &&
 246               !window_state->CanMaximize()) ||
 247          target_state == wm::WINDOW_STATE_TYPE_FULLSCREEN);
 248
 249   if (target_state == wm::WINDOW_STATE_TYPE_MINIMIZED) {
 250     if (current_state_type_ == wm::WINDOW_STATE_TYPE_MINIMIZED)
 251       return;
 252
 253     current_state_type_ = target_state;
 254     ::wm::SetWindowVisibilityAnimationType(
 255         window_state->window(), WINDOW_VISIBILITY_ANIMATION_TYPE_MINIMIZE);
 256     window_state->window()->Hide();
 257     if (window_state->IsActive())
 258       window_state->Deactivate();
 259     return;
 260   }
 261
 262   if (current_state_type_ == target_state) {
 263     // If the state type did not change, update it accordingly.
 264     UpdateBounds(window_state, animated);
 265     return;
 266   }
 267
 268   const wm::WindowStateType old_state_type = current_state_type_;
 269   current_state_type_ = target_state;
 270   window_state->UpdateWindowShowStateFromStateType();
 271   window_state->NotifyPreStateTypeChange(old_state_type);
 272   UpdateBounds(window_state, animated);
 273   window_state->NotifyPostStateTypeChange(old_state_type);
 274
 275   if ((window_state->window()->TargetVisibility() ||
 276       old_state_type == wm::WINDOW_STATE_TYPE_MINIMIZED) &&
 277       !window_state->window()->layer()->visible()) {
 278     // The layer may be hidden if the window was previously minimized. Make
 279     // sure it's visible.
 280     window_state->window()->Show();
 281   }
 282 }
 283
 284 wm::WindowStateType MaximizeModeWindowState::GetMaximizedOrCenteredWindowType(
 285       wm::WindowState* window_state) {
 286   return window_state->CanMaximize() ? wm::WINDOW_STATE_TYPE_MAXIMIZED :
 287                                        wm::WINDOW_STATE_TYPE_NORMAL;
 288 }
 289
 290 void MaximizeModeWindowState::UpdateBounds(wm::WindowState* window_state,
 291                                            bool animated) {
 292   if (defer_bounds_updates_)
 293     return;
 294   gfx::Rect bounds_in_parent = GetBoundsInMaximizedMode(window_state);
 295   // If we have a target bounds rectangle, we center it and set it
 296   // accordingly.
 297   if (!bounds_in_parent.IsEmpty() &&
 298       bounds_in_parent != window_state->window()->bounds()) {
 299     if (current_state_type_ == wm::WINDOW_STATE_TYPE_MINIMIZED ||
 300         !window_state->window()->IsVisible() ||
 301         !animated) {
 302       window_state->SetBoundsDirect(bounds_in_parent);
 303     } else {
 304       // If we animate (to) maximized mode, we want to use the cross fade to
 305       // avoid flashing.
 306       if (window_state->IsMaximized())
 307         window_state->SetBoundsDirectCrossFade(bounds_in_parent);
 308       else
 309         window_state->SetBoundsDirectAnimated(bounds_in_parent);
 310     }
 311   }
 312 }
 313
 314 }  // namespace ash