src/ui/events/gesture_detection/filtered_gesture_provider.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/events/gesture_detection/filtered_gesture_provider.h"
   6
   7 #include "base/auto_reset.h"
   8 #include "base/logging.h"
   9 #include "ui/events/gesture_detection/motion_event.h"
  10
  11 namespace ui {
  12
  13 FilteredGestureProvider::FilteredGestureProvider(
  14     const GestureProvider::Config& config,
  15     GestureProviderClient* client)
  16     : client_(client),
  17       gesture_provider_(config, this),
  18       gesture_filter_(this),
  19       handling_event_(false) {}
  20
  21 bool FilteredGestureProvider::OnTouchEvent(const MotionEvent& event) {
  22   DCHECK(!handling_event_);
  23   base::AutoReset<bool> handling_event(&handling_event_, true);
  24
  25   pending_gesture_packet_ = GestureEventDataPacket::FromTouch(event);
  26
  27   if (!gesture_provider_.OnTouchEvent(event))
  28     return false;
  29
  30   TouchDispositionGestureFilter::PacketResult result =
  31       gesture_filter_.OnGesturePacket(pending_gesture_packet_);
  32   if (result != TouchDispositionGestureFilter::SUCCESS) {
  33     NOTREACHED() << "Invalid touch gesture sequence detected.";
  34     return false;
  35   }
  36
  37   return true;
  38 }
  39
  40 void FilteredGestureProvider::OnTouchEventAck(bool event_consumed) {
  41   gesture_filter_.OnTouchEventAck(event_consumed);
  42 }
  43
  44 void FilteredGestureProvider::SetMultiTouchZoomSupportEnabled(
  45     bool enabled) {
  46   gesture_provider_.SetMultiTouchZoomSupportEnabled(enabled);
  47 }
  48
  49 void FilteredGestureProvider::SetDoubleTapSupportForPlatformEnabled(
  50     bool enabled) {
  51   gesture_provider_.SetDoubleTapSupportForPlatformEnabled(enabled);
  52 }
  53
  54 void FilteredGestureProvider::SetDoubleTapSupportForPageEnabled(bool enabled) {
  55   gesture_provider_.SetDoubleTapSupportForPageEnabled(enabled);
  56 }
  57
  58 const ui::MotionEvent* FilteredGestureProvider::GetCurrentDownEvent() const {
  59   return gesture_provider_.current_down_event();
  60 }
  61
  62 void FilteredGestureProvider::OnGestureEvent(const GestureEventData& event) {
  63   if (handling_event_) {
  64     pending_gesture_packet_.Push(event);
  65     return;
  66   }
  67
  68   gesture_filter_.OnGesturePacket(
  69       GestureEventDataPacket::FromTouchTimeout(event));
  70 }
  71
  72 void FilteredGestureProvider::ForwardGestureEvent(
  73     const GestureEventData& event) {
  74   client_->OnGestureEvent(event);
  75 }
  76
  77 }  // namespace ui