Separate out event-targeting logic in EventDispatcher to EventTargeter.

services/ui/ws/event_targeter.cc

+// Copyright 2017 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 "services/ui/ws/event_targeter.h"
+
+#include "services/ui/ws/event_dispatcher_delegate.h"
+#include "services/ui/ws/modal_window_controller.h"
+#include "services/ui/ws/window_finder.h"
+#include "ui/events/event.h"
+#include "ui/gfx/geometry/point.h"
+
+namespace ui {
+namespace ws {
+
+EventTargeter::EventTargeter(EventDispatcherDelegate* event_dispatcher_delegate,
+                             ModalWindowController* modal_window_controller)
+    : event_dispatcher_delegate_(event_dispatcher_delegate),
+      modal_window_controller_(modal_window_controller) {}
+
+EventTargeter::~EventTargeter() {}
+
+PointerTarget EventTargeter::PointerTargetForEvent(
+    const ui::LocatedEvent& event) {
+  PointerTarget pointer_target;
+  DeepestWindow deepest_window =
+      FindDeepestVisibleWindowForEvents(event.root_location());
+  pointer_target.window =
+      modal_window_controller_->GetTargetForWindow(deepest_window.window);
+  pointer_target.is_mouse_event = event.IsMousePointerEvent();
+  pointer_target.in_nonclient_area =
+      deepest_window.window != pointer_target.window ||
+      !pointer_target.window || deepest_window.in_non_client_area;
+  pointer_target.is_pointer_down = event.type() == ui::ET_POINTER_DOWN;
+  return pointer_target;
+}
+
+DeepestWindow EventTargeter::FindDeepestVisibleWindowForEvents(
+    const gfx::Point& location) {
+  gfx::Point relative_location(location);
+  // For the case of no root.
+  ServerWindow* root =
+      event_dispatcher_delegate_->GetRootWindowContaining(&relative_location);
+  return root ? ui::ws::FindDeepestVisibleWindowForEvents(root,
+                                                          relative_location)
+              : DeepestWindow();
+}
+
+}  // namespace ws
+}  // namespace ui