ash/display/screen_position_controller.cc

   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
  25 namespace ash {
  26 namespace {
  27
  28 // Move all transient children to |dst_root|, including the ones in
  29 // the child windows and transient children of the transient children.
  30 void 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.
  60 std::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
 110 namespace internal {
 111
 112 void 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
 122 void 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
 132 void ScreenPositionController::ConvertNativePointToScreen(
 133     aura::Window* window,
 134     gfx::Point* point) {
 135   std::pair<aura::RootWindow*, gfx::Point> pair =
 136       GetRootWindowRelativeToWindow(
 137           window,
 138           ui::ConvertPointToDIP(window->GetRootWindow()->layer(), *point));
 139   *point = pair.second;
 140   ConvertPointToScreen(pair.first, point);
 141 }
 142
 143 void ScreenPositionController::SetBounds(aura::Window* window,
 144                                          const gfx::Rect& bounds,
 145                                          const gfx::Display& display) {
 146   DCHECK_NE(-1, display.id());
 147   if (!window->parent()->GetProperty(internal::kUsesScreenCoordinatesKey)) {
 148     window->SetBounds(bounds);
 149     return;
 150   }
 151
 152   // Don't move a window to other root window if:
 153   // a) the window is a transient window. It moves when its
 154   //    transient_parent moves.
 155   // b) if the window has kStayInSameRootWindowkey. It's intentionally kept in
 156   //    the same root window even if the bounds is outside of the display.
 157   if (!window->transient_parent() &&
 158       !window->GetProperty(internal::kStayInSameRootWindowKey)) {
 159     aura::RootWindow* dst_root =
 160         Shell::GetInstance()->display_controller()->GetRootWindowForDisplayId(
 161             display.id());
 162     DCHECK(dst_root);
 163     aura::Window* dst_container = NULL;
 164     if (dst_root != window->GetRootWindow()) {
 165       int container_id = window->parent()->id();
 166       // All containers that uses screen coordinates must have valid window ids.
 167       DCHECK_GE(container_id, 0);
 168       // Don't move modal background.
 169       if (!SystemModalContainerLayoutManager::IsModalBackground(window))
 170         dst_container = Shell::GetContainer(dst_root, container_id);
 171     }
 172
 173     if (dst_container && window->parent() != dst_container) {
 174       aura::Window* focused = aura::client::GetFocusClient(window)->
 175           GetFocusedWindow();
 176       aura::client::ActivationClient* activation_client =
 177           aura::client::GetActivationClient(window->GetRootWindow());
 178       aura::Window* active = activation_client->GetActiveWindow();
 179
 180       aura::WindowTracker tracker;
 181       if (focused)
 182         tracker.Add(focused);
 183       if (active && focused != active)
 184         tracker.Add(active);
 185
 186       if (dst_container->id() == kShellWindowId_WorkspaceContainer) {
 187         dst_container =
 188             GetRootWindowController(dst_root)->workspace_controller()->
 189             GetParentForNewWindow(window);
 190       }
 191
 192       dst_container->AddChild(window);
 193
 194       MoveAllTransientChildrenToNewRoot(display, window);
 195
 196       // Restore focused/active window.
 197       if (tracker.Contains(focused)) {
 198         aura::client::GetFocusClient(window)->FocusWindow(focused, NULL);
 199       } else if (tracker.Contains(active)) {
 200         activation_client->ActivateWindow(active);
 201       }
 202     }
 203   }
 204
 205   gfx::Point origin(bounds.origin());
 206   const gfx::Point display_origin = Shell::GetScreen()->GetDisplayNearestWindow(
 207       window).bounds().origin();
 208   origin.Offset(-display_origin.x(), -display_origin.y());
 209   window->SetBounds(gfx::Rect(origin, bounds.size()));
 210 }
 211
 212 }  // internal
 213 }  // ash