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/window_util.h"
6
7#include <vector>
8
9#include "ash/ash_constants.h"
10#include "ash/screen_util.h"
11#include "ash/shell.h"
12#include "ash/snap_to_pixel_layout_manager.h"
13#include "ash/wm/window_properties.h"
14#include "ash/wm/window_state.h"
15#include "ash/wm/wm_event.h"
16#include "ui/aura/client/aura_constants.h"
17#include "ui/aura/window.h"
18#include "ui/aura/window_delegate.h"
19#include "ui/aura/window_event_dispatcher.h"
20#include "ui/compositor/dip_util.h"
21#include "ui/gfx/display.h"
22#include "ui/gfx/rect.h"
23#include "ui/gfx/screen.h"
24#include "ui/gfx/size.h"
25#include "ui/views/view.h"
26#include "ui/views/widget/widget.h"
27#include "ui/wm/core/window_util.h"
28#include "ui/wm/public/activation_client.h"
29
30namespace ash {
31namespace wm {
32
33namespace {
34
35// Returns the default width of a snapped window.
36int GetDefaultSnappedWindowWidth(aura::Window* window) {
37  const float kSnappedWidthWorkspaceRatio = 0.5f;
38
39  int work_area_width =
40      ScreenUtil::GetDisplayWorkAreaBoundsInParent(window).width();
41  int min_width = window->delegate() ?
42      window->delegate()->GetMinimumSize().width() : 0;
43  int ideal_width =
44      static_cast<int>(work_area_width * kSnappedWidthWorkspaceRatio);
45  return std::min(work_area_width, std::max(ideal_width, min_width));
46}
47
48}  // namespace
49
50// TODO(beng): replace many of these functions with the corewm versions.
51void ActivateWindow(aura::Window* window) {
52  ::wm::ActivateWindow(window);
53}
54
55void DeactivateWindow(aura::Window* window) {
56  ::wm::DeactivateWindow(window);
57}
58
59bool IsActiveWindow(aura::Window* window) {
60  return ::wm::IsActiveWindow(window);
61}
62
63aura::Window* GetActiveWindow() {
64  return aura::client::GetActivationClient(Shell::GetPrimaryRootWindow())->
65      GetActiveWindow();
66}
67
68aura::Window* GetActivatableWindow(aura::Window* window) {
69  return ::wm::GetActivatableWindow(window);
70}
71
72bool CanActivateWindow(aura::Window* window) {
73  return ::wm::CanActivateWindow(window);
74}
75
76bool IsWindowMinimized(aura::Window* window) {
77  return ash::wm::GetWindowState(window)->IsMinimized();
78}
79
80void CenterWindow(aura::Window* window) {
81  wm::WMEvent event(wm::WM_EVENT_CENTER);
82  wm::GetWindowState(window)->OnWMEvent(&event);
83}
84
85gfx::Rect GetDefaultLeftSnappedWindowBoundsInParent(aura::Window* window) {
86  gfx::Rect work_area_in_parent(ScreenUtil::GetDisplayWorkAreaBoundsInParent(
87      window));
88  return gfx::Rect(work_area_in_parent.x(),
89                   work_area_in_parent.y(),
90                   GetDefaultSnappedWindowWidth(window),
91                   work_area_in_parent.height());
92}
93
94gfx::Rect GetDefaultRightSnappedWindowBoundsInParent(aura::Window* window) {
95  gfx::Rect work_area_in_parent(ScreenUtil::GetDisplayWorkAreaBoundsInParent(
96      window));
97  int width = GetDefaultSnappedWindowWidth(window);
98  return gfx::Rect(work_area_in_parent.right() - width,
99                   work_area_in_parent.y(),
100                   width,
101                   work_area_in_parent.height());
102}
103
104void AdjustBoundsSmallerThan(const gfx::Size& max_size, gfx::Rect* bounds) {
105  bounds->set_width(std::min(bounds->width(), max_size.width()));
106  bounds->set_height(std::min(bounds->height(), max_size.height()));
107}
108
109void AdjustBoundsToEnsureMinimumWindowVisibility(const gfx::Rect& visible_area,
110                                                 gfx::Rect* bounds) {
111  AdjustBoundsToEnsureWindowVisibility(
112      visible_area, kMinimumOnScreenArea, kMinimumOnScreenArea, bounds);
113}
114
115void AdjustBoundsToEnsureWindowVisibility(const gfx::Rect& visible_area,
116                                          int min_width,
117                                          int min_height,
118                                          gfx::Rect* bounds) {
119  AdjustBoundsSmallerThan(visible_area.size(), bounds);
120
121  min_width = std::min(min_width, visible_area.width());
122  min_height = std::min(min_height, visible_area.height());
123
124  if (bounds->right() < visible_area.x() + min_width) {
125    bounds->set_x(visible_area.x() + min_width - bounds->width());
126  } else if (bounds->x() > visible_area.right() - min_width) {
127    bounds->set_x(visible_area.right() - min_width);
128  }
129  if (bounds->bottom() < visible_area.y() + min_height) {
130    bounds->set_y(visible_area.y() + min_height - bounds->height());
131  } else if (bounds->y() > visible_area.bottom() - min_height) {
132    bounds->set_y(visible_area.bottom() - min_height);
133  }
134  if (bounds->y() < visible_area.y())
135    bounds->set_y(visible_area.y());
136}
137
138bool MoveWindowToEventRoot(aura::Window* window, const ui::Event& event) {
139  views::View* target = static_cast<views::View*>(event.target());
140  if (!target)
141    return false;
142  aura::Window* target_root =
143      target->GetWidget()->GetNativeView()->GetRootWindow();
144  if (!target_root || target_root == window->GetRootWindow())
145    return false;
146  aura::Window* window_container =
147      ash::Shell::GetContainer(target_root, window->parent()->id());
148  // Move the window to the target launcher.
149  window_container->AddChild(window);
150  return true;
151}
152
153void ReparentChildWithTransientChildren(aura::Window* child,
154                                        aura::Window* old_parent,
155                                        aura::Window* new_parent) {
156  if (child->parent() == old_parent)
157    new_parent->AddChild(child);
158  ReparentTransientChildrenOfChild(child, old_parent, new_parent);
159}
160
161void ReparentTransientChildrenOfChild(aura::Window* child,
162                                      aura::Window* old_parent,
163                                      aura::Window* new_parent) {
164  for (size_t i = 0;
165       i < ::wm::GetTransientChildren(child).size();
166       ++i) {
167    ReparentChildWithTransientChildren(
168        ::wm::GetTransientChildren(child)[i],
169        old_parent,
170        new_parent);
171  }
172}
173
174void SnapWindowToPixelBoundary(aura::Window* window) {
175  aura::Window* snapped_ancestor = window->parent();
176  while (snapped_ancestor) {
177    if (snapped_ancestor->GetProperty(kSnapChildrenToPixelBoundary)) {
178      ui::SnapLayerToPhysicalPixelBoundary(snapped_ancestor->layer(),
179                                           window->layer());
180      return;
181    }
182    snapped_ancestor = snapped_ancestor->parent();
183  }
184}
185
186void SetSnapsChildrenToPhysicalPixelBoundary(aura::Window* container) {
187  DCHECK(!container->GetProperty(kSnapChildrenToPixelBoundary))
188      << container->name();
189  container->SetProperty(kSnapChildrenToPixelBoundary, true);
190}
191
192void InstallSnapLayoutManagerToContainers(aura::Window* parent) {
193  aura::Window::Windows children = parent->children();
194  for (aura::Window::Windows::iterator iter = children.begin();
195       iter != children.end();
196       ++iter) {
197    aura::Window* container = *iter;
198    if (container->id() < 0)  // not a container
199      continue;
200    if (container->GetProperty(kSnapChildrenToPixelBoundary)) {
201      if (!container->layout_manager())
202        container->SetLayoutManager(new SnapToPixelLayoutManager(container));
203    } else {
204      InstallSnapLayoutManagerToContainers(container);
205    }
206  }
207}
208
209}  // namespace wm
210}  // namespace ash
211