ui/views/widget/desktop_aura/x11_topmost_window_finder.cc

   1 // Copyright 2014 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 "ui/views/widget/desktop_aura/x11_topmost_window_finder.h"
   6
   7 #include <X11/Xutil.h>
   8
   9 #include "ui/aura/client/screen_position_client.h"
  10 #include "ui/aura/window.h"
  11 #include "ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h"
  12
  13 namespace views {
  14
  15 X11TopmostWindowFinder::X11TopmostWindowFinder() : toplevel_(None) {
  16 }
  17
  18 X11TopmostWindowFinder::~X11TopmostWindowFinder() {
  19 }
  20
  21 aura::Window* X11TopmostWindowFinder::FindLocalProcessWindowAt(
  22     const gfx::Point& screen_loc,
  23     const std::set<aura::Window*>& ignore) {
  24   screen_loc_ = screen_loc;
  25   ignore_ = ignore;
  26
  27   std::vector<aura::Window*> local_process_windows =
  28       DesktopWindowTreeHostX11::GetAllOpenWindows();
  29   bool found_local_process_window = false;
  30   for (size_t i = 0; i < local_process_windows.size(); ++i) {
  31     if (ShouldStopIteratingAtLocalProcessWindow(local_process_windows[i])) {
  32       found_local_process_window = true;
  33       break;
  34     }
  35   }
  36   if (!found_local_process_window)
  37     return NULL;
  38
  39   ui::EnumerateTopLevelWindows(this);
  40   return DesktopWindowTreeHostX11::GetContentWindowForXID(toplevel_);
  41 }
  42
  43 XID X11TopmostWindowFinder::FindWindowAt(const gfx::Point& screen_loc) {
  44   screen_loc_ = screen_loc;
  45   ui::EnumerateTopLevelWindows(this);
  46   return toplevel_;
  47 }
  48
  49 bool X11TopmostWindowFinder::ShouldStopIterating(XID xid) {
  50   if (!ui::IsWindowVisible(xid))
  51     return false;
  52
  53   aura::Window* window =
  54       views::DesktopWindowTreeHostX11::GetContentWindowForXID(xid);
  55   if (window) {
  56     if (ShouldStopIteratingAtLocalProcessWindow(window)) {
  57       toplevel_ = xid;
  58       return true;
  59     }
  60     return false;
  61   }
  62
  63   if (ui::WindowContainsPoint(xid, screen_loc_)) {
  64     toplevel_ = xid;
  65     return true;
  66   }
  67   return false;
  68 }
  69
  70 bool X11TopmostWindowFinder::ShouldStopIteratingAtLocalProcessWindow(
  71     aura::Window* window) {
  72   if (ignore_.find(window) != ignore_.end())
  73     return false;
  74
  75   // Currently |window|->IsVisible() always returns true.
  76   // TODO(pkotwicz): Fix this. crbug.com/353038
  77   if (!window->IsVisible())
  78     return false;
  79
  80   DesktopWindowTreeHostX11* host =
  81       DesktopWindowTreeHostX11::GetHostForXID(
  82           window->GetHost()->GetAcceleratedWidget());
  83   if (!host->GetX11RootWindowOuterBounds().Contains(screen_loc_))
  84     return false;
  85
  86   ::Region shape = host->GetWindowShape();
  87   if (!shape)
  88     return true;
  89
  90   aura::client::ScreenPositionClient* screen_position_client =
  91       aura::client::GetScreenPositionClient(window->GetRootWindow());
  92   gfx::Point window_loc(screen_loc_);
  93   screen_position_client->ConvertPointFromScreen(window, &window_loc);
  94   return XPointInRegion(shape, window_loc.x(), window_loc.y()) == True;
  95 }
  96
  97 }  // namespace views