mus: Add watcher for all touch events.

ui/views/mus/window_manager_connection.cc

 // Copyright 2015 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 "ui/views/mus/window_manager_connection.h"
 
 #include <utility>
 
 #include "base/lazy_instance.h"
 #include "base/threading/thread_local.h"
 #include "services/shell/public/cpp/connection.h"
 #include "services/shell/public/cpp/connector.h"
 #include "services/ui/public/cpp/property_type_converters.h"
 #include "services/ui/public/cpp/window.h"
 #include "services/ui/public/cpp/window_property.h"
 #include "services/ui/public/cpp/window_tree_client.h"
 #include "services/ui/public/interfaces/event_matcher.mojom.h"
 #include "services/ui/public/interfaces/window_tree.mojom.h"
 #include "ui/views/mus/clipboard_mus.h"
 #include "ui/views/mus/native_widget_mus.h"
 #include "ui/views/mus/screen_mus.h"
 #include "ui/views/pointer_watcher.h"
+#include "ui/views/touch_event_watcher.h"
 #include "ui/views/views_delegate.h"
 
 namespace views {
 namespace {
 
 using WindowManagerConnectionPtr =
     base::ThreadLocalPointer<views::WindowManagerConnection>;
 
 // Env is thread local so that aura may be used on multiple threads.
 base::LazyInstance<WindowManagerConnectionPtr>::Leaky lazy_tls_ptr =
@@ skipping 48 matching lines @@
 
 void WindowManagerConnection::AddPointerWatcher(PointerWatcher* watcher) {
   bool had_watcher = HasPointerWatcher();
   pointer_watchers_.AddObserver(watcher);
   if (!had_watcher) {
     // Start a watcher for pointer down.
     // TODO(jamescook): Extend event observers to handle multiple event types.
     ui::mojom::EventMatcherPtr matcher = ui::mojom::EventMatcher::New();
     matcher->type_matcher = ui::mojom::EventTypeMatcher::New();
     matcher->type_matcher->type = ui::mojom::EventType::POINTER_DOWN;
-    client_->SetEventObserver(std::move(matcher));
+    uint32_t id = client_->AddEventObserver(std::move(matcher));
+    if (id > 0u) {
+      pointer_watcher_observer_id_ = id;
+    }
   }
 }
 
 void WindowManagerConnection::RemovePointerWatcher(PointerWatcher* watcher) {
   pointer_watchers_.RemoveObserver(watcher);
   if (!HasPointerWatcher()) {
     // Last PointerWatcher removed, stop the event observer.
-    client_->SetEventObserver(nullptr);
+    client_->RemoveEventObserver(pointer_watcher_observer_id_);
   }
 }
 
+void WindowManagerConnection::AddTouchEventWatcher(TouchEventWatcher* watcher) {
+  bool had_watcher = HasTouchEventWatcher();
+  touch_event_watchers_.AddObserver(watcher);
+  if (!had_watcher) {
+    ui::mojom::EventMatcherPtr matcher = ui::mojom::EventMatcher::New();
+    matcher->pointer_kind_matcher = ui::mojom::PointerKindMatcher::New();
+    matcher->pointer_kind_matcher->pointer_kind = ui::mojom::PointerKind::TOUCH;
+    uint32_t id = client_->AddEventObserver(std::move(matcher));
+    if (id > 0u) {
+      touch_event_watcher_observer_id_ = id;
+    }
+  }
+}
+
+void WindowManagerConnection::RemoveTouchEventWatcher(
+  TouchEventWatcher* watcher) {
+  touch_event_watchers_.RemoveObserver(watcher);
+  if (!HasTouchEventWatcher()) {
+    // Last PointerWatcher removed, stop the event observer.
+    client_->RemoveEventObserver(touch_event_watcher_observer_id_);
+  }
+}
+
 WindowManagerConnection::WindowManagerConnection(
     shell::Connector* connector,
     const shell::Identity& identity)
     : connector_(connector), identity_(identity) {
   lazy_tls_ptr.Pointer()->Set(this);
   client_.reset(new ui::WindowTreeClient(this, nullptr, nullptr));
   client_->ConnectViaWindowTreeFactory(connector_);
 
   screen_.reset(new ScreenMus(this));
   screen_->Init(connector);
@@ skipping 22 matching lines @@
 }
 
 bool WindowManagerConnection::HasPointerWatcher() {
   // Check to see if we really have any observers left. This doesn't use
   // base::ObserverList<>::might_have_observers() because that returns true
   // during iteration over the list even when the last observer is removed.
   base::ObserverList<PointerWatcher>::Iterator iterator(&pointer_watchers_);
   return !!iterator.GetNext();
 }
 
+bool WindowManagerConnection::HasTouchEventWatcher() {
+  // Check to see if we really have any observers left. This doesn't use
+  // base::ObserverList<>::might_have_observers() because that returns true
+  // during iteration over the list even when the last observer is removed.
+  base::ObserverList<TouchEventWatcher>::Iterator iterator(
+    &touch_event_watchers_);
+  return !!iterator.GetNext();
+}
+
 void WindowManagerConnection::OnEmbed(ui::Window* root) {}
 
 void WindowManagerConnection::OnDidDestroyClient(ui::WindowTreeClient* client) {
   if (client_.get() == client) {
     client_.release();
   } else {
     DCHECK(!client_);
   }
 }
 
@@ skipping 13 matching lines @@
   gfx::Point location_in_screen = event.AsLocatedEvent()->root_location();
   if (event.type() == ui::ET_MOUSE_PRESSED) {
     FOR_EACH_OBSERVER(PointerWatcher, pointer_watchers_,
                       OnMousePressed(*event.AsMouseEvent(), location_in_screen,
                                      target_widget));
   } else if (event.type() == ui::ET_TOUCH_PRESSED) {
     FOR_EACH_OBSERVER(PointerWatcher, pointer_watchers_,
                       OnTouchPressed(*event.AsTouchEvent(), location_in_screen,
                                      target_widget));
   }
+
+  // Receives TouchEvent and TouchPointerEvent
+  if (event.IsTouchEvent() || event.IsTouchPointerEvent()) {
+    FOR_EACH_OBSERVER(TouchEventWatcher, touch_event_watchers_,
+                      OnTouchEventObserved(*event.AsLocatedEvent(),
+                        location_in_screen,
+                        target_widget));
+  }
 }
 
 void WindowManagerConnection::OnWindowManagerFrameValuesChanged() {
   if (client_)
     NativeWidgetMus::NotifyFrameChanged(client_.get());
 }
 
 gfx::Point WindowManagerConnection::GetCursorScreenPoint() {
   return client_->GetCursorScreenPoint();
 }
 
 }  // namespace views