screen_position_controller.cc revision 7d4cd473f85ac64c3747c96c277f9e506a0d2246 
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/display/screen_position_controller.h"
6
7#include "ash/display/display_controller.h"
8#include "ash/root_window_controller.h"
9#include "ash/shell.h"
10#include "ash/shell_window_ids.h"
11#include "ash/wm/coordinate_conversion.h"
12#include "ash/wm/system_modal_container_layout_manager.h"
13#include "ash/wm/window_properties.h"
14#include "ash/wm/workspace_controller.h"
15#include "ui/aura/client/activation_client.h"
16#include "ui/aura/client/capture_client.h"
17#include "ui/aura/client/focus_client.h"
18#include "ui/aura/client/stacking_client.h"
19#include "ui/aura/root_window.h"
20#include "ui/aura/window_tracker.h"
21#include "ui/compositor/dip_util.h"
22#include "ui/gfx/display.h"
23#include "ui/gfx/screen.h"
24
25namespace ash {
26namespace {
27
28// Move all transient children to |dst_root|, including the ones in
29// the child windows and transient children of the transient children.
30void MoveAllTransientChildrenToNewRoot(const gfx::Display& display,
31                                       aura::Window* window) {
32  aura::RootWindow* dst_root = Shell::GetInstance()->display_controller()->
33      GetRootWindowForDisplayId(display.id());
34  aura::Window::Windows transient_children = window->transient_children();
35  for (aura::Window::Windows::iterator iter = transient_children.begin();
36       iter != transient_children.end(); ++iter) {
37    aura::Window* transient_child = *iter;
38    int container_id = transient_child->parent()->id();
39    DCHECK_GE(container_id, 0);
40    aura::Window* container = Shell::GetContainer(dst_root, container_id);
41    gfx::Rect parent_bounds_in_screen = transient_child->GetBoundsInScreen();
42    container->AddChild(transient_child);
43    transient_child->SetBoundsInScreen(parent_bounds_in_screen, display);
44
45    // Transient children may have transient children.
46    MoveAllTransientChildrenToNewRoot(display, transient_child);
47  }
48  // Move transient children of the child windows if any.
49  aura::Window::Windows children = window->children();
50  for (aura::Window::Windows::iterator iter = children.begin();
51       iter != children.end(); ++iter)
52    MoveAllTransientChildrenToNewRoot(display, *iter);
53}
54
55// Finds the root window at |location| in |window|'s coordinates and returns a
56// pair of root window and location in that root window's coordinates. The
57// function usually returns |window->GetRootWindow()|, but if the mouse pointer
58// is moved outside the |window|'s root while the mouse is captured, it returns
59// the other root window.
60std::pair<aura::RootWindow*, gfx::Point> GetRootWindowRelativeToWindow(
61    aura::Window* window,
62    const gfx::Point& location) {
63  aura::RootWindow* root_window = window->GetRootWindow();
64  gfx::Point location_in_root(location);
65  aura::Window::ConvertPointToTarget(window, root_window, &location_in_root);
66
67#if defined(USE_X11)
68  if (!root_window->ContainsPointInRoot(location_in_root)) {
69    // This conversion is necessary to deal with X's passive input
70    // grab while dragging window. For example, if we have two
71    // displays, say 1000x1000 (primary) and 500x500 (extended one
72    // on the right), and start dragging a window at (999, 123), and
73    // then move the pointer to the right, the pointer suddenly
74    // warps to the extended display. The destination is (0, 123) in
75    // the secondary root window's coordinates, or (1000, 123) in
76    // the screen coordinates. However, since the mouse is captured
77    // by X during drag, a weird LocatedEvent, something like (0, 1123)
78    // in the *primary* root window's coordinates, is sent to Chrome
79    // (Remember that in the native X11 world, the two root windows
80    // are always stacked vertically regardless of the display
81    // layout in Ash). We need to figure out that (0, 1123) in the
82    // primary root window's coordinates is actually (0, 123) in the
83    // extended root window's coordinates.
84
85    gfx::Point location_in_native(location_in_root);
86    root_window->ConvertPointToNativeScreen(&location_in_native);
87
88    Shell::RootWindowList root_windows = Shell::GetAllRootWindows();
89    for (size_t i = 0; i < root_windows.size(); ++i) {
90      const gfx::Rect native_bounds(
91          root_windows[i]->GetHostOrigin(),
92          root_windows[i]->GetHostSize());  // in px.
93      if (native_bounds.Contains(location_in_native)) {
94        root_window = root_windows[i];
95        location_in_root = location_in_native;
96        root_window->ConvertPointFromNativeScreen(&location_in_root);
97        break;
98      }
99    }
100  }
101#else
102  // TODO(yusukes): Support non-X11 platforms if necessary.
103#endif
104
105  return std::make_pair(root_window, location_in_root);
106}
107
108}  // namespace
109
110namespace internal {
111
112void ScreenPositionController::ConvertPointToScreen(
113    const aura::Window* window,
114    gfx::Point* point) {
115  const aura::RootWindow* root = window->GetRootWindow();
116  aura::Window::ConvertPointToTarget(window, root, point);
117  const gfx::Point display_origin = Shell::GetScreen()->GetDisplayNearestWindow(
118      const_cast<aura::RootWindow*>(root)).bounds().origin();
119  point->Offset(display_origin.x(), display_origin.y());
120}
121
122void ScreenPositionController::ConvertPointFromScreen(
123    const aura::Window* window,
124    gfx::Point* point) {
125  const aura::RootWindow* root = window->GetRootWindow();
126  const gfx::Point display_origin = Shell::GetScreen()->GetDisplayNearestWindow(
127      const_cast<aura::RootWindow*>(root)).bounds().origin();
128  point->Offset(-display_origin.x(), -display_origin.y());
129  aura::Window::ConvertPointToTarget(root, window, point);
130}
131
132void ScreenPositionController::ConvertHostPointToScreen(
133    aura::RootWindow* root_window,
134    gfx::Point* point) {
135  root_window->ConvertPointFromHost(point);
136  std::pair<aura::RootWindow*, gfx::Point> pair =
137      GetRootWindowRelativeToWindow(root_window, *point);
138  *point = pair.second;
139  ConvertPointToScreen(pair.first, point);
140}
141
142void ScreenPositionController::SetBounds(aura::Window* window,
143                                         const gfx::Rect& bounds,
144                                         const gfx::Display& display) {
145  DCHECK_NE(-1, display.id());
146  if (!window->parent()->GetProperty(internal::kUsesScreenCoordinatesKey)) {
147    window->SetBounds(bounds);
148    return;
149  }
150
151  // Don't move a window to other root window if:
152  // a) the window is a transient window. It moves when its
153  //    transient_parent moves.
154  // b) if the window has kStayInSameRootWindowkey. It's intentionally kept in
155  //    the same root window even if the bounds is outside of the display.
156  if (!window->transient_parent() &&
157      !window->GetProperty(internal::kStayInSameRootWindowKey)) {
158    aura::RootWindow* dst_root =
159        Shell::GetInstance()->display_controller()->GetRootWindowForDisplayId(
160            display.id());
161    DCHECK(dst_root);
162    aura::Window* dst_container = NULL;
163    if (dst_root != window->GetRootWindow()) {
164      int container_id = window->parent()->id();
165      // Dragging a docked window to another root window should show it floating
166      // rather than docked in another screen's dock.
167      if (container_id == kShellWindowId_DockedContainer)
168        container_id = kShellWindowId_WorkspaceContainer;
169      // All containers that uses screen coordinates must have valid window ids.
170      DCHECK_GE(container_id, 0);
171      // Don't move modal background.
172      if (!SystemModalContainerLayoutManager::IsModalBackground(window))
173        dst_container = Shell::GetContainer(dst_root, container_id);
174    }
175
176    if (dst_container && window->parent() != dst_container) {
177      aura::Window* focused = aura::client::GetFocusClient(window)->
178          GetFocusedWindow();
179      aura::client::ActivationClient* activation_client =
180          aura::client::GetActivationClient(window->GetRootWindow());
181      aura::Window* active = activation_client->GetActiveWindow();
182
183      aura::WindowTracker tracker;
184      if (focused)
185        tracker.Add(focused);
186      if (active && focused != active)
187        tracker.Add(active);
188
189      if (dst_container->id() == kShellWindowId_WorkspaceContainer) {
190        dst_container =
191            GetRootWindowController(dst_root)->workspace_controller()->
192            GetParentForNewWindow(window);
193      }
194
195      dst_container->AddChild(window);
196
197      MoveAllTransientChildrenToNewRoot(display, window);
198
199      // Restore focused/active window.
200      if (tracker.Contains(focused)) {
201        aura::client::GetFocusClient(window)->FocusWindow(focused);
202      } else if (tracker.Contains(active)) {
203        activation_client->ActivateWindow(active);
204      }
205    }
206  }
207
208  gfx::Point origin(bounds.origin());
209  const gfx::Point display_origin = Shell::GetScreen()->GetDisplayNearestWindow(
210      window).bounds().origin();
211  origin.Offset(-display_origin.x(), -display_origin.y());
212  window->SetBounds(gfx::Rect(origin, bounds.size()));
213}
214
215}  // internal
216}  // ash
217