ash: Eliminate PointerWatcherDelegate

ash/pointer_watcher_delegate_aura.cc

-// Copyright 2016 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/pointer_watcher_delegate_aura.h"
-
-#include "ash/shell.h"
-#include "ui/aura/client/screen_position_client.h"
-#include "ui/aura/window.h"
-#include "ui/events/event.h"
-#include "ui/events/event_constants.h"
-#include "ui/gfx/geometry/point.h"
-#include "ui/views/pointer_watcher.h"
-#include "ui/views/widget/widget.h"
-
-namespace ash {
-
-PointerWatcherDelegateAura::PointerWatcherDelegateAura() {
-  Shell::GetInstance()->AddPreTargetHandler(this);
-}
-
-PointerWatcherDelegateAura::~PointerWatcherDelegateAura() {
-  Shell::GetInstance()->RemovePreTargetHandler(this);
-}
-
-void PointerWatcherDelegateAura::AddPointerWatcher(
-    views::PointerWatcher* watcher,
-    bool wants_moves) {
-  // We only allow a watcher to be added once. That is, we don't consider
-  // the pair of |watcher| and |wants_move| unique, just |watcher|.
-  if (wants_moves) {
-    DCHECK(!non_move_watchers_.HasObserver(watcher));
-    move_watchers_.AddObserver(watcher);
-  } else {
-    DCHECK(!move_watchers_.HasObserver(watcher));
-    non_move_watchers_.AddObserver(watcher);
-  }
-}
-
-void PointerWatcherDelegateAura::RemovePointerWatcher(
-    views::PointerWatcher* watcher) {
-  non_move_watchers_.RemoveObserver(watcher);
-  move_watchers_.RemoveObserver(watcher);
-}
-
-void PointerWatcherDelegateAura::OnMouseEvent(ui::MouseEvent* event) {
-  if (event->type() == ui::ET_MOUSE_CAPTURE_CHANGED) {
-    FOR_EACH_OBSERVER(views::PointerWatcher, non_move_watchers_,
-                      OnMouseCaptureChanged());
-    FOR_EACH_OBSERVER(views::PointerWatcher, move_watchers_,
-                      OnMouseCaptureChanged());
-    return;
-  }
-
-  // For compatibility with the mus version, don't send drags.
-  if (event->type() != ui::ET_MOUSE_PRESSED &&
-      event->type() != ui::ET_MOUSE_RELEASED &&
-      event->type() != ui::ET_MOUSE_MOVED)
-    return;
-
-  DCHECK(ui::PointerEvent::CanConvertFrom(*event));
-  NotifyWatchers(ui::PointerEvent(*event), *event);
-}
-
-void PointerWatcherDelegateAura::OnTouchEvent(ui::TouchEvent* event) {
-  // For compatibility with the mus version, don't send drags.
-  if (event->type() != ui::ET_TOUCH_PRESSED &&
-      event->type() != ui::ET_TOUCH_RELEASED)
-    return;
-
-  DCHECK(ui::PointerEvent::CanConvertFrom(*event));
-  NotifyWatchers(ui::PointerEvent(*event), *event);
-}
-
-gfx::Point PointerWatcherDelegateAura::GetLocationInScreen(
-    const ui::LocatedEvent& event) const {
-  aura::Window* target = static_cast<aura::Window*>(event.target());
-  gfx::Point location_in_screen = event.location();
-  aura::client::GetScreenPositionClient(target->GetRootWindow())
-      ->ConvertPointToScreen(target, &location_in_screen);
-  return location_in_screen;
-}
-
-views::Widget* PointerWatcherDelegateAura::GetTargetWidget(
-    const ui::LocatedEvent& event) const {
-  aura::Window* window = static_cast<aura::Window*>(event.target());
-  return views::Widget::GetTopLevelWidgetForNativeView(window);
-}
-
-void PointerWatcherDelegateAura::NotifyWatchers(
-    const ui::PointerEvent& event,
-    const ui::LocatedEvent& original_event) {
-  const gfx::Point screen_location(GetLocationInScreen(original_event));
-  views::Widget* target_widget = GetTargetWidget(original_event);
-  FOR_EACH_OBSERVER(
-      views::PointerWatcher, move_watchers_,
-      OnPointerEventObserved(event, screen_location, target_widget));
-  if (event.type() != ui::ET_POINTER_MOVED) {
-    FOR_EACH_OBSERVER(
-        views::PointerWatcher, non_move_watchers_,
-        OnPointerEventObserved(event, screen_location, target_widget));
-  }
-}
-
-}  // namespace ash