window_state.cc revision 23730a6e56a168d1879203e4b3819bb36e3d8f1f 
1// Copyright 2013 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/window_state.h"
6
7#include "ash/ash_switches.h"
8#include "ash/root_window_controller.h"
9#include "ash/screen_util.h"
10#include "ash/shell_window_ids.h"
11#include "ash/wm/default_state.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_observer.h"
16#include "ash/wm/window_util.h"
17#include "ash/wm/wm_event.h"
18#include "base/auto_reset.h"
19#include "base/command_line.h"
20#include "ui/aura/client/aura_constants.h"
21#include "ui/aura/layout_manager.h"
22#include "ui/aura/window.h"
23#include "ui/aura/window_delegate.h"
24#include "ui/compositor/layer_tree_owner.h"
25#include "ui/compositor/scoped_layer_animation_settings.h"
26#include "ui/gfx/display.h"
27#include "ui/wm/core/window_util.h"
28
29namespace ash {
30namespace wm {
31
32namespace {
33
34// A tentative class to set the bounds on the window.
35// TODO(oshima): Once all logic is cleaned up, move this to the real layout
36// manager with proper friendship.
37class BoundsSetter : public aura::LayoutManager {
38 public:
39  BoundsSetter() {}
40  virtual ~BoundsSetter() {}
41
42  // aura::LayoutManager overrides:
43  virtual void OnWindowResized() OVERRIDE {}
44  virtual void OnWindowAddedToLayout(aura::Window* child) OVERRIDE {}
45  virtual void OnWillRemoveWindowFromLayout(aura::Window* child) OVERRIDE {}
46  virtual void OnWindowRemovedFromLayout(aura::Window* child) OVERRIDE {}
47  virtual void OnChildWindowVisibilityChanged(
48      aura::Window* child, bool visible) OVERRIDE {}
49  virtual void SetChildBounds(
50      aura::Window* child, const gfx::Rect& requested_bounds) OVERRIDE {}
51
52  void SetBounds(aura::Window* window, const gfx::Rect& bounds) {
53    SetChildBoundsDirect(window, bounds);
54  }
55
56 private:
57  DISALLOW_COPY_AND_ASSIGN(BoundsSetter);
58};
59
60WMEventType WMEventTypeFromShowState(ui::WindowShowState requested_show_state) {
61  switch (requested_show_state) {
62    case ui::SHOW_STATE_DEFAULT:
63    case ui::SHOW_STATE_NORMAL:
64      return WM_EVENT_NORMAL;
65    case ui::SHOW_STATE_MINIMIZED:
66      return WM_EVENT_MINIMIZE;
67    case ui::SHOW_STATE_MAXIMIZED:
68      return WM_EVENT_MAXIMIZE;
69    case ui::SHOW_STATE_FULLSCREEN:
70      return WM_EVENT_FULLSCREEN;
71    case ui::SHOW_STATE_INACTIVE:
72      return WM_EVENT_SHOW_INACTIVE;
73    case ui::SHOW_STATE_DETACHED:
74    case ui::SHOW_STATE_END:
75      NOTREACHED() << "No WMEvent defined for the show state:"
76                   << requested_show_state;
77  }
78  return WM_EVENT_NORMAL;
79}
80
81}  // namespace
82
83WindowState::WindowState(aura::Window* window)
84    : window_(window),
85      window_position_managed_(false),
86      bounds_changed_by_user_(false),
87      panel_attached_(true),
88      ignored_by_shelf_(false),
89      can_consume_system_keys_(false),
90      top_row_keys_are_function_keys_(false),
91      unminimize_to_restore_bounds_(false),
92      hide_shelf_when_fullscreen_(true),
93      minimum_visibility_(false),
94      can_be_dragged_(true),
95      ignore_property_change_(false),
96      current_state_(new DefaultState(ToWindowStateType(GetShowState()))) {
97  window_->AddObserver(this);
98}
99
100WindowState::~WindowState() {
101}
102
103bool WindowState::HasDelegate() const {
104  return delegate_;
105}
106
107void WindowState::SetDelegate(scoped_ptr<WindowStateDelegate> delegate) {
108  DCHECK(!delegate_.get());
109  delegate_ = delegate.Pass();
110}
111
112WindowStateType WindowState::GetStateType() const {
113  return current_state_->GetType();
114}
115
116bool WindowState::IsMinimized() const {
117  return GetStateType() == WINDOW_STATE_TYPE_MINIMIZED;
118}
119
120bool WindowState::IsMaximized() const {
121  return GetStateType() == WINDOW_STATE_TYPE_MAXIMIZED;
122}
123
124bool WindowState::IsFullscreen() const {
125  return GetStateType() == WINDOW_STATE_TYPE_FULLSCREEN;
126}
127
128bool WindowState::IsMaximizedOrFullscreen() const {
129  return GetStateType() == WINDOW_STATE_TYPE_FULLSCREEN ||
130      GetStateType() == WINDOW_STATE_TYPE_MAXIMIZED;
131}
132
133bool WindowState::IsSnapped() const {
134  return GetStateType() == WINDOW_STATE_TYPE_LEFT_SNAPPED ||
135      GetStateType() == WINDOW_STATE_TYPE_RIGHT_SNAPPED;
136}
137
138bool WindowState::IsNormalStateType() const {
139  return GetStateType() == WINDOW_STATE_TYPE_NORMAL ||
140      GetStateType() == WINDOW_STATE_TYPE_DEFAULT;
141}
142
143bool WindowState::IsNormalOrSnapped() const {
144  return IsNormalStateType() || IsSnapped();
145}
146
147bool WindowState::IsActive() const {
148  return IsActiveWindow(window_);
149}
150
151bool WindowState::IsDocked() const {
152  return window_->parent() &&
153      window_->parent()->id() == internal::kShellWindowId_DockedContainer;
154}
155
156bool WindowState::CanMaximize() const {
157  return window_->GetProperty(aura::client::kCanMaximizeKey);
158}
159
160bool WindowState::CanMinimize() const {
161  internal::RootWindowController* controller =
162      internal::RootWindowController::ForWindow(window_);
163  if (!controller)
164    return false;
165  aura::Window* lockscreen = controller->GetContainer(
166      internal::kShellWindowId_LockScreenContainersContainer);
167  if (lockscreen->Contains(window_))
168    return false;
169
170  return true;
171}
172
173bool WindowState::CanResize() const {
174  return window_->GetProperty(aura::client::kCanResizeKey);
175}
176
177bool WindowState::CanActivate() const {
178  return ::wm::CanActivateWindow(window_);
179}
180
181bool WindowState::CanSnap() const {
182  if (!CanResize() || window_->type() == ui::wm::WINDOW_TYPE_PANEL ||
183      ::wm::GetTransientParent(window_))
184    return false;
185  // If a window has a maximum size defined, snapping may make it too big.
186  // TODO(oshima): We probably should snap if possible.
187  return window_->delegate() ? window_->delegate()->GetMaximumSize().IsEmpty() :
188                              true;
189}
190
191bool WindowState::HasRestoreBounds() const {
192  return window_->GetProperty(aura::client::kRestoreBoundsKey) != NULL;
193}
194
195void WindowState::Maximize() {
196  window_->SetProperty(aura::client::kShowStateKey, ui::SHOW_STATE_MAXIMIZED);
197}
198
199void WindowState::Minimize() {
200  window_->SetProperty(aura::client::kShowStateKey, ui::SHOW_STATE_MINIMIZED);
201}
202
203void WindowState::Unminimize() {
204  window_->SetProperty(
205      aura::client::kShowStateKey,
206      window_->GetProperty(aura::client::kRestoreShowStateKey));
207  window_->ClearProperty(aura::client::kRestoreShowStateKey);
208}
209
210void WindowState::Activate() {
211  ActivateWindow(window_);
212}
213
214void WindowState::Deactivate() {
215  DeactivateWindow(window_);
216}
217
218void WindowState::Restore() {
219  if (!IsNormalStateType()) {
220    const WMEvent event(WM_EVENT_NORMAL);
221    OnWMEvent(&event);
222  }
223}
224
225void WindowState::OnWMEvent(const WMEvent* event) {
226  current_state_->OnWMEvent(this, event);
227}
228
229void WindowState::SaveCurrentBoundsForRestore() {
230  gfx::Rect bounds_in_screen =
231      ScreenUtil::ConvertRectToScreen(window_->parent(),
232                                      window_->bounds());
233  SetRestoreBoundsInScreen(bounds_in_screen);
234}
235
236gfx::Rect WindowState::GetRestoreBoundsInScreen() const {
237  return *window_->GetProperty(aura::client::kRestoreBoundsKey);
238}
239
240gfx::Rect WindowState::GetRestoreBoundsInParent() const {
241  return ScreenUtil::ConvertRectFromScreen(window_->parent(),
242                                          GetRestoreBoundsInScreen());
243}
244
245void WindowState::SetRestoreBoundsInScreen(const gfx::Rect& bounds) {
246  window_->SetProperty(aura::client::kRestoreBoundsKey, new gfx::Rect(bounds));
247}
248
249void WindowState::SetRestoreBoundsInParent(const gfx::Rect& bounds) {
250  SetRestoreBoundsInScreen(
251      ScreenUtil::ConvertRectToScreen(window_->parent(), bounds));
252}
253
254void WindowState::ClearRestoreBounds() {
255  window_->ClearProperty(aura::client::kRestoreBoundsKey);
256}
257
258scoped_ptr<WindowState::State> WindowState::SetStateObject(
259    scoped_ptr<WindowState::State> new_state) {
260  current_state_->DetachState(this);
261  scoped_ptr<WindowState::State> old_object = current_state_.Pass();
262  current_state_ = new_state.Pass();
263  current_state_->AttachState(this, old_object.get());
264  return old_object.Pass();
265}
266
267void WindowState::SetPreAutoManageWindowBounds(
268    const gfx::Rect& bounds) {
269  pre_auto_manage_window_bounds_.reset(new gfx::Rect(bounds));
270}
271
272void WindowState::AddObserver(WindowStateObserver* observer) {
273  observer_list_.AddObserver(observer);
274}
275
276void WindowState::RemoveObserver(WindowStateObserver* observer) {
277  observer_list_.RemoveObserver(observer);
278}
279
280void WindowState::CreateDragDetails(aura::Window* window,
281                                    const gfx::Point& point_in_parent,
282                                    int window_component,
283                                    aura::client::WindowMoveSource source) {
284  drag_details_.reset(
285      new DragDetails(window, point_in_parent, window_component, source));
286}
287
288void WindowState::DeleteDragDetails() {
289  drag_details_.reset();
290}
291
292void WindowState::SetAndClearRestoreBounds() {
293  DCHECK(HasRestoreBounds());
294  SetBoundsInScreen(GetRestoreBoundsInScreen());
295  ClearRestoreBounds();
296}
297
298void WindowState::OnWindowPropertyChanged(aura::Window* window,
299                                          const void* key,
300                                          intptr_t old) {
301  DCHECK_EQ(window, window_);
302  if (key == aura::client::kShowStateKey && !ignore_property_change_) {
303    WMEvent event(WMEventTypeFromShowState(GetShowState()));
304    OnWMEvent(&event);
305  }
306}
307
308void WindowState::SetBoundsInScreen(
309    const gfx::Rect& bounds_in_screen) {
310  gfx::Rect bounds_in_parent =
311      ScreenUtil::ConvertRectFromScreen(window_->parent(),
312                                       bounds_in_screen);
313  window_->SetBounds(bounds_in_parent);
314}
315
316ui::WindowShowState WindowState::GetShowState() const {
317  return window_->GetProperty(aura::client::kShowStateKey);
318}
319
320void WindowState::AdjustSnappedBounds(gfx::Rect* bounds) {
321  if (is_dragged() || !IsSnapped())
322    return;
323  gfx::Rect maximized_bounds = ScreenUtil::GetMaximizedWindowBoundsInParent(
324      window_);
325  if (GetStateType() == WINDOW_STATE_TYPE_LEFT_SNAPPED)
326    bounds->set_x(maximized_bounds.x());
327  else if (GetStateType() == WINDOW_STATE_TYPE_RIGHT_SNAPPED)
328    bounds->set_x(maximized_bounds.right() - bounds->width());
329  bounds->set_y(maximized_bounds.y());
330  bounds->set_height(maximized_bounds.height());
331}
332
333void WindowState::UpdateWindowShowStateFromStateType() {
334  ui::WindowShowState new_window_state =
335      ToWindowShowState(current_state_->GetType());
336  if (new_window_state != GetShowState()) {
337    base::AutoReset<bool> resetter(&ignore_property_change_, true);
338    window_->SetProperty(aura::client::kShowStateKey, new_window_state);
339  }
340}
341
342void WindowState::NotifyPreStateTypeChange(
343    WindowStateType old_window_state_type) {
344  FOR_EACH_OBSERVER(WindowStateObserver, observer_list_,
345                    OnPreWindowStateTypeChange(this, old_window_state_type));
346}
347
348void WindowState::NotifyPostStateTypeChange(
349    WindowStateType old_window_state_type) {
350  FOR_EACH_OBSERVER(WindowStateObserver, observer_list_,
351                    OnPostWindowStateTypeChange(this, old_window_state_type));
352}
353
354void WindowState::SetBoundsDirect(const gfx::Rect& bounds) {
355  BoundsSetter().SetBounds(window_, bounds);
356}
357
358void WindowState::SetBoundsConstrained(const gfx::Rect& bounds) {
359  gfx::Rect work_area_in_parent =
360      ScreenUtil::GetDisplayWorkAreaBoundsInParent(window_);
361  gfx::Rect child_bounds(bounds);
362  AdjustBoundsSmallerThan(work_area_in_parent.size(), &child_bounds);
363  SetBoundsDirect(child_bounds);
364}
365
366void WindowState::SetBoundsDirectAnimated(const gfx::Rect& bounds) {
367  const int kBoundsChangeSlideDurationMs = 120;
368
369  ui::Layer* layer = window_->layer();
370  ui::ScopedLayerAnimationSettings slide_settings(layer->GetAnimator());
371  slide_settings.SetPreemptionStrategy(
372      ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET);
373  slide_settings.SetTransitionDuration(
374      base::TimeDelta::FromMilliseconds(kBoundsChangeSlideDurationMs));
375  SetBoundsDirect(bounds);
376}
377
378void WindowState::SetBoundsDirectCrossFade(const gfx::Rect& new_bounds) {
379  // Some test results in invoking CrossFadeToBounds when window is not visible.
380  // No animation is necessary in that case, thus just change the bounds and
381  // quit.
382  if (!window_->TargetVisibility()) {
383    SetBoundsConstrained(new_bounds);
384    return;
385  }
386
387  const gfx::Rect old_bounds = window_->bounds();
388
389  // Create fresh layers for the window and all its children to paint into.
390  // Takes ownership of the old layer and all its children, which will be
391  // cleaned up after the animation completes.
392  // Specify |set_bounds| to true here to keep the old bounds in the child
393  // windows of |window|.
394  scoped_ptr<ui::LayerTreeOwner> old_layer_owner =
395      ::wm::RecreateLayers(window_);
396  ui::Layer* old_layer = old_layer_owner->root();
397  DCHECK(old_layer);
398  ui::Layer* new_layer = window_->layer();
399
400  // Resize the window to the new size, which will force a layout and paint.
401  SetBoundsDirect(new_bounds);
402
403  // Ensure the higher-resolution layer is on top.
404  bool old_on_top = (old_bounds.width() > new_bounds.width());
405  if (old_on_top)
406    old_layer->parent()->StackBelow(new_layer, old_layer);
407  else
408    old_layer->parent()->StackAbove(new_layer, old_layer);
409
410  CrossFadeAnimation(window_, old_layer_owner.Pass(), gfx::Tween::EASE_OUT);
411}
412
413WindowState* GetActiveWindowState() {
414  aura::Window* active = GetActiveWindow();
415  return active ? GetWindowState(active) : NULL;
416}
417
418WindowState* GetWindowState(aura::Window* window) {
419  if (!window)
420    return NULL;
421  WindowState* settings = window->GetProperty(internal::kWindowStateKey);
422  if(!settings) {
423    settings = new WindowState(window);
424    window->SetProperty(internal::kWindowStateKey, settings);
425  }
426  return settings;
427}
428
429const WindowState* GetWindowState(const aura::Window* window) {
430  return GetWindowState(const_cast<aura::Window*>(window));
431}
432
433}  // namespace wm
434}  // namespace ash
435