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/window_state.h"
  15 #include "ui/aura/client/capture_client.h"
  16 #include "ui/aura/client/focus_client.h"
  17 #include "ui/aura/window_event_dispatcher.h"
  18 #include "ui/aura/window_tracker.h"
  19 #include "ui/compositor/dip_util.h"
  20 #include "ui/gfx/display.h"
  21 #include "ui/gfx/screen.h"
  22 #include "ui/wm/core/window_util.h"
  23 #include "ui/wm/public/activation_client.h"
  24
  25 namespace ash {
  26 namespace {
  27
  28 // Return true if the window or its ancestor has |kStayInSameRootWindowkey|
  29 // property.
  30 bool ShouldStayInSameRootWindow(const aura::Window* window) {
  31   return window && (window->GetProperty(kStayInSameRootWindowKey) ||
  32                     ShouldStayInSameRootWindow(window->parent()));
  33 }
  34
  35 // Move all transient children to |dst_root|, including the ones in
  36 // the child windows and transient children of the transient children.
  37 void MoveAllTransientChildrenToNewRoot(const gfx::Display& display,
  38                                        aura::Window* window) {
  39   aura::Window* dst_root = Shell::GetInstance()->display_controller()->
  40       GetRootWindowForDisplayId(display.id());
  41   aura::Window::Windows transient_children =
  42       ::wm::GetTransientChildren(window);
  43   for (aura::Window::Windows::iterator iter = transient_children.begin();
  44        iter != transient_children.end(); ++iter) {
  45     aura::Window* transient_child = *iter;
  46     int container_id = transient_child->parent()->id();
  47     DCHECK_GE(container_id, 0);
  48     aura::Window* container = Shell::GetContainer(dst_root, container_id);
  49     gfx::Rect parent_bounds_in_screen = transient_child->GetBoundsInScreen();
  50     container->AddChild(transient_child);
  51     transient_child->SetBoundsInScreen(parent_bounds_in_screen, display);
  52
  53     // Transient children may have transient children.
  54     MoveAllTransientChildrenToNewRoot(display, transient_child);
  55   }
  56   // Move transient children of the child windows if any.
  57   aura::Window::Windows children = window->children();
  58   for (aura::Window::Windows::iterator iter = children.begin();
  59        iter != children.end(); ++iter)
  60     MoveAllTransientChildrenToNewRoot(display, *iter);
  61 }
  62
  63 }  // namespace
  64
  65 // static
  66 void ScreenPositionController::ConvertHostPointToRelativeToRootWindow(
  67     aura::Window* root_window,
  68     const aura::Window::Windows& root_windows,
  69     gfx::Point* point,
  70     aura::Window** target_root) {
  71   DCHECK(!root_window->parent());
  72   gfx::Point point_in_root(*point);
  73   root_window->GetHost()->ConvertPointFromHost(&point_in_root);
  74
  75   *target_root = root_window;
  76   *point = point_in_root;
  77
  78 #if defined(USE_X11) || defined(USE_OZONE)
  79   if (!root_window->ContainsPointInRoot(point_in_root)) {
  80     // This conversion is necessary to deal with X's passive input
  81     // grab while dragging window. For example, if we have two
  82     // displays, say 1000x1000 (primary) and 500x500 (extended one
  83     // on the right), and start dragging a window at (999, 123), and
  84     // then move the pointer to the right, the pointer suddenly
  85     // warps to the extended display. The destination is (0, 123) in
  86     // the secondary root window's coordinates, or (1000, 123) in
  87     // the screen coordinates. However, since the mouse is captured
  88     // by X during drag, a weird LocatedEvent, something like (0, 1123)
  89     // in the *primary* root window's coordinates, is sent to Chrome
  90     // (Remember that in the native X11 world, the two root windows
  91     // are always stacked vertically regardless of the display
  92     // layout in Ash). We need to figure out that (0, 1123) in the
  93     // primary root window's coordinates is actually (0, 123) in the
  94     // extended root window's coordinates.
  95     //
  96     // For now Ozone works in a similar manner as X11. Transitioning from one
  97     // display's coordinate system to anothers may cause events in the
  98     // primary's coordinate system which fall in the extended display.
  99
 100     gfx::Point location_in_native(point_in_root);
 101
 102     root_window->GetHost()->ConvertPointToNativeScreen(&location_in_native);
 103
 104     for (size_t i = 0; i < root_windows.size(); ++i) {
 105       aura::WindowTreeHost* host = root_windows[i]->GetHost();
 106       const gfx::Rect native_bounds = host->GetBounds();
 107       if (native_bounds.Contains(location_in_native)) {
 108         *target_root = root_windows[i];
 109         *point = location_in_native;
 110         host->ConvertPointFromNativeScreen(point);
 111         break;
 112       }
 113     }
 114   }
 115 #else
 116   NOTIMPLEMENTED();
 117 #endif
 118 }
 119
 120 void ScreenPositionController::ConvertPointToScreen(
 121     const aura::Window* window,
 122     gfx::Point* point) {
 123   const aura::Window* root = window->GetRootWindow();
 124   aura::Window::ConvertPointToTarget(window, root, point);
 125   const gfx::Point display_origin = Shell::GetScreen()->GetDisplayNearestWindow(
 126       const_cast<aura::Window*>(root)).bounds().origin();
 127   point->Offset(display_origin.x(), display_origin.y());
 128 }
 129
 130 void ScreenPositionController::ConvertPointFromScreen(
 131     const aura::Window* window,
 132     gfx::Point* point) {
 133   const aura::Window* root = window->GetRootWindow();
 134   const gfx::Point display_origin = Shell::GetScreen()->GetDisplayNearestWindow(
 135       const_cast<aura::Window*>(root)).bounds().origin();
 136   point->Offset(-display_origin.x(), -display_origin.y());
 137   aura::Window::ConvertPointToTarget(root, window, point);
 138 }
 139
 140 void ScreenPositionController::ConvertHostPointToScreen(
 141     aura::Window* root_window,
 142     gfx::Point* point) {
 143   aura::Window* root = root_window->GetRootWindow();
 144   aura::Window* target_root = nullptr;
 145   ConvertHostPointToRelativeToRootWindow(root, Shell::GetAllRootWindows(),
 146                                          point, &target_root);
 147   ConvertPointToScreen(target_root, point);
 148 }
 149
 150 void ScreenPositionController::SetBounds(aura::Window* window,
 151                                          const gfx::Rect& bounds,
 152                                          const gfx::Display& display) {
 153   DCHECK_NE(-1, display.id());
 154   if (!window->parent()->GetProperty(kUsesScreenCoordinatesKey)) {
 155     window->SetBounds(bounds);
 156     return;
 157   }
 158
 159   // Don't move a window to other root window if:
 160   // a) the window is a transient window. It moves when its
 161   //    transient_parent moves.
 162   // b) if the window or its ancestor has kStayInSameRootWindowkey. It's
 163   //    intentionally kept in the same root window even if the bounds is
 164   //    outside of the display.
 165   if (!::wm::GetTransientParent(window) &&
 166       !ShouldStayInSameRootWindow(window)) {
 167     aura::Window* dst_root =
 168         Shell::GetInstance()->display_controller()->GetRootWindowForDisplayId(
 169             display.id());
 170     DCHECK(dst_root);
 171     aura::Window* dst_container = NULL;
 172     if (dst_root != window->GetRootWindow()) {
 173       int container_id = window->parent()->id();
 174       // All containers that uses screen coordinates must have valid window ids.
 175       DCHECK_GE(container_id, 0);
 176       // Don't move modal background.
 177       if (!SystemModalContainerLayoutManager::IsModalBackground(window))
 178         dst_container = Shell::GetContainer(dst_root, container_id);
 179     }
 180
 181     if (dst_container && window->parent() != dst_container) {
 182       aura::Window* focused = aura::client::GetFocusClient(window)->
 183           GetFocusedWindow();
 184       aura::client::ActivationClient* activation_client =
 185           aura::client::GetActivationClient(window->GetRootWindow());
 186       aura::Window* active = activation_client->GetActiveWindow();
 187
 188       aura::WindowTracker tracker;
 189       if (focused)
 190         tracker.Add(focused);
 191       if (active && focused != active)
 192         tracker.Add(active);
 193
 194       // Set new bounds now so that the container's layout manager
 195       // can adjust the bounds if necessary.
 196       gfx::Point origin = bounds.origin();
 197       const gfx::Point display_origin = display.bounds().origin();
 198       origin.Offset(-display_origin.x(), -display_origin.y());
 199       gfx::Rect new_bounds = gfx::Rect(origin, bounds.size());
 200
 201       window->SetBounds(new_bounds);
 202
 203       dst_container->AddChild(window);
 204
 205       MoveAllTransientChildrenToNewRoot(display, window);
 206
 207       // Restore focused/active window.
 208       if (tracker.Contains(focused)) {
 209         aura::client::GetFocusClient(window)->FocusWindow(focused);
 210         // TODO(beng): replace with GetRootWindow().
 211         ash::Shell::GetInstance()->set_target_root_window(
 212             focused->GetRootWindow());
 213       } else if (tracker.Contains(active)) {
 214         activation_client->ActivateWindow(active);
 215       }
 216       // TODO(oshima): We should not have to update the bounds again
 217       // below in theory, but we currently do need as there is a code
 218       // that assumes that the bounds will never be overridden by the
 219       // layout mananger. We should have more explicit control how
 220       // constraints are applied by the layout manager.
 221     }
 222   }
 223   gfx::Point origin(bounds.origin());
 224   const gfx::Point display_origin = Shell::GetScreen()->GetDisplayNearestWindow(
 225       window).bounds().origin();
 226   origin.Offset(-display_origin.x(), -display_origin.y());
 227   window->SetBounds(gfx::Rect(origin, bounds.size()));
 228 }
 229
 230 }  // namespace ash