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.h"
  18 #include "ui/aura/window_event_dispatcher.h"
  19 #include "ui/aura/window_tracker.h"
  20 #include "ui/aura/window_tree_host.h"
  21 #include "ui/compositor/dip_util.h"
  22 #include "ui/gfx/display.h"
  23 #include "ui/gfx/screen.h"
  24 #include "ui/wm/core/window_util.h"
  25 #include "ui/wm/public/activation_client.h"
  26
  27 namespace ash {
  28 namespace {
  29
  30 // Return true if the window or its ancestor has |kStayInSameRootWindowkey|
  31 // property.
  32 bool ShouldStayInSameRootWindow(const aura::Window* window) {
  33   return window && (window->GetProperty(kStayInSameRootWindowKey) ||
  34                     ShouldStayInSameRootWindow(window->parent()));
  35 }
  36
  37 // Move all transient children to |dst_root|, including the ones in
  38 // the child windows and transient children of the transient children.
  39 void MoveAllTransientChildrenToNewRoot(const gfx::Display& display,
  40                                        aura::Window* window) {
  41   aura::Window* dst_root = Shell::GetInstance()->display_controller()->
  42       GetRootWindowForDisplayId(display.id());
  43   aura::Window::Windows transient_children =
  44       ::wm::GetTransientChildren(window);
  45   for (aura::Window::Windows::iterator iter = transient_children.begin();
  46        iter != transient_children.end(); ++iter) {
  47     aura::Window* transient_child = *iter;
  48     int container_id = transient_child->parent()->id();
  49     DCHECK_GE(container_id, 0);
  50     aura::Window* container = Shell::GetContainer(dst_root, container_id);
  51     gfx::Rect parent_bounds_in_screen = transient_child->GetBoundsInScreen();
  52     container->AddChild(transient_child);
  53     transient_child->SetBoundsInScreen(parent_bounds_in_screen, display);
  54
  55     // Transient children may have transient children.
  56     MoveAllTransientChildrenToNewRoot(display, transient_child);
  57   }
  58   // Move transient children of the child windows if any.
  59   aura::Window::Windows children = window->children();
  60   for (aura::Window::Windows::iterator iter = children.begin();
  61        iter != children.end(); ++iter)
  62     MoveAllTransientChildrenToNewRoot(display, *iter);
  63 }
  64
  65 }  // namespace
  66
  67 // static
  68 void ScreenPositionController::ConvertHostPointToRelativeToRootWindow(
  69     aura::Window* root_window,
  70     const aura::Window::Windows& root_windows,
  71     gfx::Point* point,
  72     aura::Window** target_root) {
  73   DCHECK(!root_window->parent());
  74   gfx::Point point_in_root(*point);
  75   root_window->GetHost()->ConvertPointFromHost(&point_in_root);
  76
  77   *target_root = root_window;
  78   *point = point_in_root;
  79
  80 #if defined(USE_X11) || defined(USE_OZONE)
  81   if (!root_window->GetHost()->GetBounds().Contains(*point)) {
  82     // This conversion is necessary to deal with X's passive input
  83     // grab while dragging window. For example, if we have two
  84     // displays, say 1000x1000 (primary) and 500x500 (extended one
  85     // on the right), and start dragging a window at (999, 123), and
  86     // then move the pointer to the right, the pointer suddenly
  87     // warps to the extended display. The destination is (0, 123) in
  88     // the secondary root window's coordinates, or (1000, 123) in
  89     // the screen coordinates. However, since the mouse is captured
  90     // by X during drag, a weird LocatedEvent, something like (0, 1123)
  91     // in the *primary* root window's coordinates, is sent to Chrome
  92     // (Remember that in the native X11 world, the two root windows
  93     // are always stacked vertically regardless of the display
  94     // layout in Ash). We need to figure out that (0, 1123) in the
  95     // primary root window's coordinates is actually (0, 123) in the
  96     // extended root window's coordinates.
  97     //
  98     // For now Ozone works in a similar manner as X11. Transitioning from one
  99     // display's coordinate system to anothers may cause events in the
 100     // primary's coordinate system which fall in the extended display.
 101
 102     gfx::Point location_in_native(point_in_root);
 103
 104     root_window->GetHost()->ConvertPointToNativeScreen(&location_in_native);
 105
 106     for (size_t i = 0; i < root_windows.size(); ++i) {
 107       aura::WindowTreeHost* host = root_windows[i]->GetHost();
 108       const gfx::Rect native_bounds = host->GetBounds();
 109       if (native_bounds.Contains(location_in_native)) {
 110         *target_root = root_windows[i];
 111         *point = location_in_native;
 112         host->ConvertPointFromNativeScreen(point);
 113         break;
 114       }
 115     }
 116   }
 117 #else
 118   NOTIMPLEMENTED();
 119 #endif
 120 }
 121
 122 void ScreenPositionController::ConvertPointToScreen(
 123     const aura::Window* window,
 124     gfx::Point* point) {
 125   const aura::Window* root = window->GetRootWindow();
 126   aura::Window::ConvertPointToTarget(window, root, point);
 127   const gfx::Point display_origin = Shell::GetScreen()->GetDisplayNearestWindow(
 128       const_cast<aura::Window*>(root)).bounds().origin();
 129   point->Offset(display_origin.x(), display_origin.y());
 130 }
 131
 132 void ScreenPositionController::ConvertPointFromScreen(
 133     const aura::Window* window,
 134     gfx::Point* point) {
 135   const aura::Window* root = window->GetRootWindow();
 136   const gfx::Point display_origin = Shell::GetScreen()->GetDisplayNearestWindow(
 137       const_cast<aura::Window*>(root)).bounds().origin();
 138   point->Offset(-display_origin.x(), -display_origin.y());
 139   aura::Window::ConvertPointToTarget(root, window, point);
 140 }
 141
 142 void ScreenPositionController::ConvertHostPointToScreen(
 143     aura::Window* root_window,
 144     gfx::Point* point) {
 145   aura::Window* root = root_window->GetRootWindow();
 146   aura::Window* target_root = nullptr;
 147   ConvertHostPointToRelativeToRootWindow(root, Shell::GetAllRootWindows(),
 148                                          point, &target_root);
 149   ConvertPointToScreen(target_root, point);
 150 }
 151
 152 void ScreenPositionController::SetBounds(aura::Window* window,
 153                                          const gfx::Rect& bounds,
 154                                          const gfx::Display& display) {
 155   DCHECK_NE(-1, display.id());
 156   if (!window->parent()->GetProperty(kUsesScreenCoordinatesKey)) {
 157     window->SetBounds(bounds);
 158     return;
 159   }
 160
 161   // Don't move a window to other root window if:
 162   // a) the window is a transient window. It moves when its
 163   //    transient_parent moves.
 164   // b) if the window or its ancestor has kStayInSameRootWindowkey. It's
 165   //    intentionally kept in the same root window even if the bounds is
 166   //    outside of the display.
 167   if (!::wm::GetTransientParent(window) &&
 168       !ShouldStayInSameRootWindow(window)) {
 169     aura::Window* dst_root =
 170         Shell::GetInstance()->display_controller()->GetRootWindowForDisplayId(
 171             display.id());
 172     DCHECK(dst_root);
 173     aura::Window* dst_container = NULL;
 174     if (dst_root != window->GetRootWindow()) {
 175       int container_id = window->parent()->id();
 176       // All containers that uses screen coordinates must have valid window ids.
 177       DCHECK_GE(container_id, 0);
 178       // Don't move modal background.
 179       if (!SystemModalContainerLayoutManager::IsModalBackground(window))
 180         dst_container = Shell::GetContainer(dst_root, container_id);
 181     }
 182
 183     if (dst_container && window->parent() != dst_container) {
 184       aura::Window* focused = aura::client::GetFocusClient(window)->
 185           GetFocusedWindow();
 186       aura::client::ActivationClient* activation_client =
 187           aura::client::GetActivationClient(window->GetRootWindow());
 188       aura::Window* active = activation_client->GetActiveWindow();
 189
 190       aura::WindowTracker tracker;
 191       if (focused)
 192         tracker.Add(focused);
 193       if (active && focused != active)
 194         tracker.Add(active);
 195
 196       // Set new bounds now so that the container's layout manager
 197       // can adjust the bounds if necessary.
 198       gfx::Point origin = bounds.origin();
 199       const gfx::Point display_origin = display.bounds().origin();
 200       origin.Offset(-display_origin.x(), -display_origin.y());
 201       gfx::Rect new_bounds = gfx::Rect(origin, bounds.size());
 202
 203       window->SetBounds(new_bounds);
 204
 205       dst_container->AddChild(window);
 206
 207       MoveAllTransientChildrenToNewRoot(display, window);
 208
 209       // Restore focused/active window.
 210       if (tracker.Contains(focused)) {
 211         aura::client::GetFocusClient(window)->FocusWindow(focused);
 212         // TODO(beng): replace with GetRootWindow().
 213         ash::Shell::GetInstance()->set_target_root_window(
 214             focused->GetRootWindow());
 215       } else if (tracker.Contains(active)) {
 216         activation_client->ActivateWindow(active);
 217       }
 218       // TODO(oshima): We should not have to update the bounds again
 219       // below in theory, but we currently do need as there is a code
 220       // that assumes that the bounds will never be overridden by the
 221       // layout mananger. We should have more explicit control how
 222       // constraints are applied by the layout manager.
 223     }
 224   }
 225   gfx::Point origin(bounds.origin());
 226   const gfx::Point display_origin = Shell::GetScreen()->GetDisplayNearestWindow(
 227       window).bounds().origin();
 228   origin.Offset(-display_origin.x(), -display_origin.y());
 229   window->SetBounds(gfx::Rect(origin, bounds.size()));
 230 }
 231
 232 }  // namespace ash