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
  64   return config;
  65 }
  66
  67 #elif defined(OS_ANDROID)
  68
  69 // Default time allowance for the touch ack delay before the touch sequence is
  70 // cancelled.
  71 const int kTouchAckTimeoutDelayMs = 200;
  72
  73 GestureEventQueue::Config GetGestureEventQueueConfig() {
  74   GestureEventQueue::Config config;
  75
  76   config.touchscreen_tap_suppression_config.enabled = true;
  77   config.touchscreen_tap_suppression_config.max_cancel_to_down_time =
  78       base::TimeDelta::FromMilliseconds(
  79           gfx::ViewConfiguration::GetTapTimeoutInMs());
  80   config.touchscreen_tap_suppression_config.max_tap_gap_time =
  81       base::TimeDelta::FromMilliseconds(
  82           gfx::ViewConfiguration::GetLongPressTimeoutInMs());
  83
  84   return config;
  85 }
  86
  87 TouchEventQueue::Config GetTouchEventQueueConfig() {
  88   TouchEventQueue::Config config;
  89
  90   config.touch_ack_timeout_delay =
  91       base::TimeDelta::FromMilliseconds(kTouchAckTimeoutDelayMs);
  92   config.touch_ack_timeout_supported = true;
  93
  94   const double touch_slop_length_pixels =
  95       static_cast<double>(gfx::ViewConfiguration::GetTouchSlopInPixels());
  96   const double device_scale_factor =
  97       gfx::Screen::GetNativeScreen()->GetPrimaryDisplay().device_scale_factor();
  98   config.touchmove_slop_suppression_length_dips =
  99       touch_slop_length_pixels / device_scale_factor;
 100
 101   return config;
 102 }
 103
 104 #else
 105
 106 GestureEventQueue::Config GetGestureEventQueueConfig() {
 107   return GestureEventQueue::Config();
 108 }
 109
 110 TouchEventQueue::Config GetTouchEventQueueConfig() {
 111   TouchEventQueue::Config config;
 112   config.touchmove_slop_suppression_length_dips =
 113       ui::GestureDetector::Config().touch_slop;
 114   return config;
 115 }
 116
 117 #endif
 118
 119 TouchEventQueue::TouchScrollingMode GetTouchScrollingMode() {
 120   std::string modeString =
 121       CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
 122           switches::kTouchScrollingMode);
 123   if (modeString == switches::kTouchScrollingModeAsyncTouchmove)
 124     return TouchEventQueue::TOUCH_SCROLLING_MODE_ASYNC_TOUCHMOVE;
 125   if (modeString == switches::kTouchScrollingModeSyncTouchmove)
 126     return TouchEventQueue::TOUCH_SCROLLING_MODE_SYNC_TOUCHMOVE;
 127   if (modeString == switches::kTouchScrollingModeTouchcancel)
 128     return TouchEventQueue::TOUCH_SCROLLING_MODE_TOUCHCANCEL;
 129   if (modeString != "")
 130     LOG(ERROR) << "Invalid --touch-scrolling-mode option: " << modeString;
 131   return TouchEventQueue::TOUCH_SCROLLING_MODE_DEFAULT;
 132 }
 133
 134 }  // namespace
 135
 136 InputRouterImpl::Config GetInputRouterConfigForPlatform() {
 137   InputRouterImpl::Config config;
 138   config.gesture_config = GetGestureEventQueueConfig();
 139   config.touch_config = GetTouchEventQueueConfig();
 140   config.touch_config.touch_scrolling_mode = GetTouchScrollingMode();
 141   return config;
 142 }
 143
 144 }  // namespace content