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