content/browser/renderer_host/input/input_router_config_helper.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 "content/browser/renderer_host/input/input_router_config_helper.h"
   6
   7 #include "base/command_line.h"
   8 #include "content/public/common/content_switches.h"
   9 #include "ui/events/gesture_detection/gesture_configuration.h"
  10 #include "ui/events/gesture_detection/gesture_detector.h"
  11
  12 namespace content {
  13 namespace {
  14
  15 // Default time allowance for the touch ack delay before the touch sequence is
  16 // cancelled, depending on whether the site has a mobile-friendly viewport.
  17 // Note that these constants are effective only when the timeout is supported.
  18 const int kDesktopTouchAckTimeoutDelayMs = 200;
  19 const int kMobileTouchAckTimeoutDelayMs = 1000;
  20
  21 TouchEventQueue::Config GetTouchEventQueueConfig() {
  22   TouchEventQueue::Config config;
  23
  24   config.desktop_touch_ack_timeout_delay =
  25       base::TimeDelta::FromMilliseconds(kDesktopTouchAckTimeoutDelayMs);
  26   config.mobile_touch_ack_timeout_delay =
  27       base::TimeDelta::FromMilliseconds(kMobileTouchAckTimeoutDelayMs);
  28
  29 #if defined(OS_ANDROID)
  30   // For historical reasons only Android enables the touch ack timeout.
  31   config.touch_ack_timeout_supported = true;
  32 #else
  33   config.touch_ack_timeout_supported = false;
  34 #endif
  35
  36   return config;
  37 }
  38
  39 GestureEventQueue::Config GetGestureEventQueueConfig() {
  40   GestureEventQueue::Config config;
  41   ui::GestureConfiguration* gesture_config =
  42       ui::GestureConfiguration::GetInstance();
  43   config.debounce_interval = base::TimeDelta::FromMilliseconds(
  44       gesture_config->scroll_debounce_interval_in_ms());
  45
  46   config.touchscreen_tap_suppression_config.enabled =
  47       gesture_config->fling_touchscreen_tap_suppression_enabled();
  48   config.touchscreen_tap_suppression_config.max_cancel_to_down_time =
  49       base::TimeDelta::FromMilliseconds(
  50           gesture_config->fling_max_cancel_to_down_time_in_ms());
  51   config.touchscreen_tap_suppression_config.max_tap_gap_time =
  52       base::TimeDelta::FromMilliseconds(
  53           gesture_config->long_press_time_in_ms());
  54
  55   config.touchpad_tap_suppression_config.enabled =
  56       gesture_config->fling_touchpad_tap_suppression_enabled();
  57   config.touchpad_tap_suppression_config.max_cancel_to_down_time =
  58       base::TimeDelta::FromMilliseconds(
  59           gesture_config->fling_max_cancel_to_down_time_in_ms());
  60   config.touchpad_tap_suppression_config.max_tap_gap_time =
  61       base::TimeDelta::FromMilliseconds(
  62           gesture_config->fling_max_tap_gap_time_in_ms());
  63
  64   return config;
  65 }
  66
  67 }  // namespace
  68
  69 InputRouterImpl::Config GetInputRouterConfigForPlatform() {
  70   InputRouterImpl::Config config;
  71   config.gesture_config = GetGestureEventQueueConfig();
  72   config.touch_config = GetTouchEventQueueConfig();
  73   return config;
  74 }
  75
  76 }  // namespace content