ash: ozone: apply transformation to events outside the root window

ash/host/ash_window_tree_host.cc

Index: ash/host/ash_window_tree_host.cc
diff --git a/ash/host/ash_window_tree_host.cc b/ash/host/ash_window_tree_host.cc
new file mode 100644
index 0000000000000000000000000000000000000000..dd9cdf80d342bcbd31bba2fed4d63c46e01d1c7b
--- /dev/null
+++ b/ash/host/ash_window_tree_host.cc
@@ -0,0 +1,38 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ash/host/ash_window_tree_host.h"
+
+#include "ui/aura/client/screen_position_client.h"
+#include "ui/aura/window_tree_host.h"
+#include "ui/events/event.h"
+#include "ui/gfx/rect.h"
+
+namespace ash {
+
+void AshWindowTreeHost::TranslateLocatedEvent(ui::LocatedEvent* event) {
+  if (!event->IsTouchEvent()) {

[Daniel Erat, 2014/12/03 14:44:17]

nit: how about changing this to:

  if (event->IsTouchEvent())
    return;

  // rest of method goes here

?

[llandwerlin-old, 2014/12/03 15:57:11]

Done.

+    aura::WindowTreeHost* wth = AsWindowTreeHost();
+    aura::Window* root_window = wth->window();
+    aura::client::ScreenPositionClient* screen_position_client =
+        aura::client::GetScreenPositionClient(root_window);
+    gfx::Rect local(wth->GetBounds().size());
+    local.Inset(GetHostInsets());
+
+    if (screen_position_client && !local.Contains(event->location())) {
+      gfx::Point location(event->location());
+      // In order to get the correct point in screen coordinates
+      // during passive grab, we first need to find on which host window
+      // the mouse is on, and find out the screen coordinates on that
+      // host window, then convert it back to this host window's coordinate.
+      screen_position_client->ConvertHostPointToScreen(root_window, &location);
+      screen_position_client->ConvertPointFromScreen(root_window, &location);
+      wth->ConvertPointToHost(&location);
+      event->set_location(location);
+      event->set_root_location(location);
+    }
+  }
+}
+
+}  // namespace ash