src/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_detector.h"
  10
  11 #if defined(USE_AURA)
  12 #include "ui/events/gestures/gesture_configuration.h"
  13 #elif defined(OS_ANDROID)
  14 #include "ui/gfx/android/view_configuration.h"
  15 #include "ui/gfx/screen.h"
  16 #endif
  17
  18 namespace content {
  19 namespace {
  20
  21 #if defined(USE_AURA)
  22
  23 GestureEventQueue::Config GetGestureEventQueueConfig() {
  24   GestureEventQueue::Config config;
  25
  26 #if defined(OS_CHROMEOS)
  27   // Default debouncing interval duration on ChromeOS: if a scroll is in
  28   // progress, non-scroll events during this interval are deferred to either its
  29   // end or discarded on receipt of another GestureScrollUpdate.
  30   // TODO(jdduke): Disable and remove entirely when issues with spurious
  31   // scroll end detection on the Pixel are resolved, crbug.com/353702.
  32   const int kDebouncingIntervalTimeMs = 30;
  33   config.debounce_interval =
  34       base::TimeDelta::FromMilliseconds(kDebouncingIntervalTimeMs);
  35 #endif
  36
  37   config.touchscreen_tap_suppression_config.enabled = true;
  38   config.touchscreen_tap_suppression_config.max_cancel_to_down_time =
  39       base::TimeDelta::FromMilliseconds(
  40           ui::GestureConfiguration::fling_max_cancel_to_down_time_in_ms());
  41
  42   config.touchscreen_tap_suppression_config.max_tap_gap_time =
  43       base::TimeDelta::FromMilliseconds(static_cast<int>(
  44           ui::GestureConfiguration::semi_long_press_time_in_seconds() * 1000));
  45
  46   config.touchpad_tap_suppression_config.enabled = true;
  47   config.touchpad_tap_suppression_config.max_cancel_to_down_time =
  48       base::TimeDelta::FromMilliseconds(
  49           ui::GestureConfiguration::fling_max_cancel_to_down_time_in_ms());
  50
  51   config.touchpad_tap_suppression_config.max_tap_gap_time =
  52       base::TimeDelta::FromMilliseconds(static_cast<int>(
  53           ui::GestureConfiguration::fling_max_tap_gap_time_in_ms() * 1000));
  54
  55   return config;
  56 }
  57
  58 TouchEventQueue::Config GetTouchEventQueueConfig() {
  59   TouchEventQueue::Config config;
  60
  61   config.touchmove_slop_suppression_length_dips =
  62       ui::GestureConfiguration::max_touch_move_in_pixels_for_click();
  63   // TODO(jdduke): Remove when unified GR enabled, crbug.com/332418.
  64   config.touchmove_slop_suppression_region_includes_boundary = false;
  65
  66   return config;
  67 }
  68
  69 #elif defined(OS_ANDROID)
  70
  71 // Default time allowance for the touch ack delay before the touch sequence is
  72 // cancelled.
  73 const int kTouchAckTimeoutDelayMs = 200;
  74
  75 GestureEventQueue::Config GetGestureEventQueueConfig() {
  76   GestureEventQueue::Config config;
  77
  78   config.touchscreen_tap_suppression_config.enabled = true;
  79   config.touchscreen_tap_suppression_config.max_cancel_to_down_time =
  80       base::TimeDelta::FromMilliseconds(
  81           gfx::ViewConfiguration::GetTapTimeoutInMs());
  82   config.touchscreen_tap_suppression_config.max_tap_gap_time =
  83       base::TimeDelta::FromMilliseconds(
  84           gfx::ViewConfiguration::GetLongPressTimeoutInMs());
  85
  86   return config;
  87 }
  88
  89 TouchEventQueue::Config GetTouchEventQueueConfig() {
  90   TouchEventQueue::Config config;
  91
  92   config.touch_ack_timeout_delay =
  93       base::TimeDelta::FromMilliseconds(kTouchAckTimeoutDelayMs);
  94   config.touch_ack_timeout_supported = true;
  95
  96   const double touch_slop_length_pixels =
  97       static_cast<double>(gfx::ViewConfiguration::GetTouchSlopInPixels());
  98   const double device_scale_factor =
  99       gfx::Screen::GetNativeScreen()->GetPrimaryDisplay().device_scale_factor();
 100   config.touchmove_slop_suppression_length_dips =
 101       touch_slop_length_pixels / device_scale_factor;
 102
 103   return config;
 104 }
 105
 106 #else
 107
 108 GestureEventQueue::Config GetGestureEventQueueConfig() {
 109   return GestureEventQueue::Config();
 110 }
 111
 112 TouchEventQueue::Config GetTouchEventQueueConfig() {
 113   TouchEventQueue::Config config;
 114   config.touchmove_slop_suppression_length_dips =
 115       ui::GestureDetector::Config().touch_slop;
 116   return config;
 117 }
 118
 119 #endif
 120
 121 TouchEventQueue::TouchScrollingMode GetTouchScrollingMode() {
 122   std::string modeString =
 123       CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
 124           switches::kTouchScrollingMode);
 125   if (modeString == switches::kTouchScrollingModeAsyncTouchmove)
 126     return TouchEventQueue::TOUCH_SCROLLING_MODE_ASYNC_TOUCHMOVE;
 127   if (modeString == switches::kTouchScrollingModeSyncTouchmove)
 128     return TouchEventQueue::TOUCH_SCROLLING_MODE_SYNC_TOUCHMOVE;
 129   if (modeString == switches::kTouchScrollingModeTouchcancel)
 130     return TouchEventQueue::TOUCH_SCROLLING_MODE_TOUCHCANCEL;
 131   if (modeString != "")
 132     LOG(ERROR) << "Invalid --touch-scrolling-mode option: " << modeString;
 133   return TouchEventQueue::TOUCH_SCROLLING_MODE_DEFAULT;
 134 }
 135
 136 }  // namespace
 137
 138 InputRouterImpl::Config GetInputRouterConfigForPlatform() {
 139   InputRouterImpl::Config config;
 140   config.gesture_config = GetGestureEventQueueConfig();
 141   config.touch_config = GetTouchEventQueueConfig();
 142   config.touch_config.touch_scrolling_mode = GetTouchScrollingMode();
 143   return config;
 144 }
 145
 146 }  // namespace content