WindowManagerApp should recognize gestures

ui/events/gestures/gesture_provider_impl.cc

 // 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 "ui/events/gestures/gesture_provider_aura.h"
+#include "ui/events/gestures/gesture_provider_impl.h"
 
 #include "base/auto_reset.h"
 #include "base/logging.h"
 #include "ui/events/event.h"
 #include "ui/events/gesture_detection/gesture_config_helper.h"
 #include "ui/events/gesture_detection/gesture_event_data.h"
 #include "ui/events/gestures/gesture_configuration.h"
 
 namespace ui {
 
-GestureProviderAura::GestureProviderAura(GestureProviderAuraClient* client)
+GestureProviderImpl::GestureProviderImpl(GestureProviderImplClient* client)
     : client_(client),
       filtered_gesture_provider_(ui::DefaultGestureProviderConfig(), this),
       handling_event_(false) {
   filtered_gesture_provider_.SetDoubleTapSupportForPlatformEnabled(false);
 }
 
-GestureProviderAura::~GestureProviderAura() {}
+GestureProviderImpl::~GestureProviderImpl() {
+}
 
-bool GestureProviderAura::OnTouchEvent(const TouchEvent& event) {
+bool GestureProviderImpl::OnTouchEvent(const TouchEvent& event) {
   int index = pointer_state_.FindPointerIndexOfId(event.touch_id());
   bool pointer_id_is_active = index != -1;
 
   if (event.type() == ET_TOUCH_PRESSED && pointer_id_is_active) {
     // Ignore touch press events if we already believe the pointer is down.
     return false;
   } else if (event.type() != ET_TOUCH_PRESSED && !pointer_id_is_active) {
     // We could have an active touch stream transfered to us, resulting in touch
     // move or touch up events without associated touch down events. Ignore
     // them.
     return false;
   }
 
   // If this is a touchmove event, and it isn't different from the last
   // event, ignore it.
   if (event.type() == ET_TOUCH_MOVED &&
       event.x() == pointer_state_.GetX(index) &&
       event.y() == pointer_state_.GetY(index)) {
     return false;
   }
 
   last_touch_event_latency_info_ = *event.latency();
   pointer_state_.OnTouch(event);
 
   bool result = filtered_gesture_provider_.OnTouchEvent(pointer_state_);
   pointer_state_.CleanupRemovedTouchPoints(event);
   return result;
 }
 
-void GestureProviderAura::OnTouchEventAck(bool event_consumed) {
+void GestureProviderImpl::OnTouchEventAck(bool event_consumed) {
   DCHECK(pending_gestures_.empty());
   DCHECK(!handling_event_);
   base::AutoReset<bool> handling_event(&handling_event_, true);
   filtered_gesture_provider_.OnTouchEventAck(event_consumed);
   last_touch_event_latency_info_.Clear();
 }
 
-void GestureProviderAura::OnGestureEvent(
-    const GestureEventData& gesture) {
+void GestureProviderImpl::OnGestureEvent(const GestureEventData& gesture) {
   GestureEventDetails details = gesture.details;
   details.set_oldest_touch_id(gesture.motion_event_id);
 
   if (gesture.type() == ET_GESTURE_TAP) {
     int tap_count = 1;
     if (previous_tap_ && IsConsideredDoubleTap(*previous_tap_, gesture))
       tap_count = 1 + (previous_tap_->details.tap_count() % 3);
     details.set_tap_count(tap_count);
     if (!previous_tap_)
       previous_tap_.reset(new GestureEventData(gesture));
     else
       *previous_tap_ = gesture;
     previous_tap_->details = details;
   } else if (gesture.type() == ET_GESTURE_TAP_CANCEL) {
     previous_tap_.reset();
   }
 
   scoped_ptr<ui::GestureEvent> event(
-      new ui::GestureEvent(gesture.x,
-                           gesture.y,
-                           gesture.flags,
-                           gesture.time - base::TimeTicks(),
-                           details));
+      new ui::GestureEvent(gesture.x, gesture.y, gesture.flags,
+                           gesture.time - base::TimeTicks(), details));
 
   ui::LatencyInfo* gesture_latency = event->latency();
 
-  gesture_latency->CopyLatencyFrom(
-      last_touch_event_latency_info_,
-      ui::INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT);
-  gesture_latency->CopyLatencyFrom(
-      last_touch_event_latency_info_,
-      ui::INPUT_EVENT_LATENCY_UI_COMPONENT);
+  gesture_latency->CopyLatencyFrom(last_touch_event_latency_info_,
+                                   ui::INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT);
+  gesture_latency->CopyLatencyFrom(last_touch_event_latency_info_,
+                                   ui::INPUT_EVENT_LATENCY_UI_COMPONENT);
   gesture_latency->CopyLatencyFrom(
       last_touch_event_latency_info_,
       ui::INPUT_EVENT_LATENCY_ACKED_TOUCH_COMPONENT);
 
   if (!handling_event_) {
     // Dispatching event caused by timer.
     client_->OnGestureEvent(event.get());
   } else {
     // Memory managed by ScopedVector pending_gestures_.
     pending_gestures_.push_back(event.release());
   }
 }
 
-ScopedVector<GestureEvent>* GestureProviderAura::GetAndResetPendingGestures() {
+ScopedVector<GestureEvent>* GestureProviderImpl::GetAndResetPendingGestures() {
   if (pending_gestures_.empty())
     return NULL;
   // Caller is responsible for deleting old_pending_gestures.
   ScopedVector<GestureEvent>* old_pending_gestures =
       new ScopedVector<GestureEvent>();
   old_pending_gestures->swap(pending_gestures_);
   return old_pending_gestures;
 }
 
-bool GestureProviderAura::IsConsideredDoubleTap(
+bool GestureProviderImpl::IsConsideredDoubleTap(
     const GestureEventData& previous_tap,
     const GestureEventData& current_tap) const {
   if (current_tap.time - previous_tap.time >
       base::TimeDelta::FromMilliseconds(
           ui::GestureConfiguration::max_time_between_double_click_in_ms())) {
     return false;
   }
 
   float double_tap_slop_square =
       GestureConfiguration::max_distance_between_taps_for_double_tap();
   double_tap_slop_square *= double_tap_slop_square;
   const float delta_x = previous_tap.x - current_tap.x;
   const float delta_y = previous_tap.y - current_tap.y;
   return (delta_x * delta_x + delta_y * delta_y < double_tap_slop_square);
 }
 
 }  // namespace content