content/browser/renderer_host/input/touchscreen_tap_suppression_controller.cc

   1 // Copyright 2013 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 "content/browser/renderer_host/input/touchscreen_tap_suppression_controller.h"
   6
   7 #include "content/browser/renderer_host/input/gesture_event_queue.h"
   8
   9 using blink::WebInputEvent;
  10
  11 namespace content {
  12
  13 TouchscreenTapSuppressionController::TouchscreenTapSuppressionController(
  14     GestureEventQueue* geq,
  15     const TapSuppressionController::Config& config)
  16     : gesture_event_queue_(geq), controller_(this, config) {
  17 }
  18
  19 TouchscreenTapSuppressionController::~TouchscreenTapSuppressionController() {}
  20
  21 void TouchscreenTapSuppressionController::GestureFlingCancel() {
  22   controller_.GestureFlingCancel();
  23 }
  24
  25 void TouchscreenTapSuppressionController::GestureFlingCancelAck(
  26     bool processed) {
  27   controller_.GestureFlingCancelAck(processed);
  28 }
  29
  30 bool TouchscreenTapSuppressionController::FilterTapEvent(
  31     const GestureEventWithLatencyInfo& event) {
  32   switch (event.event.type) {
  33     case WebInputEvent::GestureTapDown:
  34       if (!controller_.ShouldDeferTapDown())
  35         return false;
  36       stashed_tap_down_.reset(new GestureEventWithLatencyInfo(event));
  37       return true;
  38
  39     case WebInputEvent::GestureShowPress:
  40       if (!stashed_tap_down_)
  41         return false;
  42       stashed_show_press_.reset(new GestureEventWithLatencyInfo(event));
  43       return true;
  44
  45     case WebInputEvent::GestureTapUnconfirmed:
  46       return stashed_tap_down_;
  47
  48     case WebInputEvent::GestureTapCancel:
  49     case WebInputEvent::GestureTap:
  50     case WebInputEvent::GestureDoubleTap:
  51       return controller_.ShouldSuppressTapEnd();
  52
  53     default:
  54       break;
  55   }
  56   return false;
  57 }
  58
  59 void TouchscreenTapSuppressionController::DropStashedTapDown() {
  60   stashed_tap_down_.reset();
  61   stashed_show_press_.reset();
  62 }
  63
  64 void TouchscreenTapSuppressionController::ForwardStashedTapDown() {
  65   DCHECK(stashed_tap_down_);
  66   ScopedGestureEvent tap_down = stashed_tap_down_.Pass();
  67   ScopedGestureEvent show_press = stashed_show_press_.Pass();
  68   gesture_event_queue_->ForwardGestureEvent(*tap_down);
  69   if (show_press)
  70     gesture_event_queue_->ForwardGestureEvent(*show_press);
  71 }
  72
  73 }  // namespace content