ui/events/gesture_detection/gesture_provider_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 "ui/events/gesture_detection/gesture_provider_config_helper.h"
   6
   7 #include "ui/events/gesture_detection/gesture_configuration.h"
   8 #include "ui/gfx/screen.h"
   9
  10 namespace ui {
  11 namespace {
  12
  13 class GenericDesktopGestureConfiguration : public GestureConfiguration {
  14  public:
  15   // The default GestureConfiguration parameters are already tailored for a
  16   // desktop environment (Aura).
  17   GenericDesktopGestureConfiguration() {}
  18   ~GenericDesktopGestureConfiguration() override {}
  19 };
  20
  21 GestureDetector::Config BuildGestureDetectorConfig(
  22     const GestureConfiguration& gesture_config) {
  23   GestureDetector::Config config;
  24   config.longpress_timeout =
  25       base::TimeDelta::FromMilliseconds(gesture_config.long_press_time_in_ms());
  26   config.showpress_timeout = base::TimeDelta::FromMilliseconds(
  27       gesture_config.show_press_delay_in_ms());
  28   config.double_tap_timeout = base::TimeDelta::FromMilliseconds(
  29       gesture_config.double_tap_timeout_in_ms());
  30   config.touch_slop = gesture_config.max_touch_move_in_pixels_for_click();
  31   config.double_tap_slop =
  32       gesture_config.max_distance_between_taps_for_double_tap();
  33   config.minimum_fling_velocity = gesture_config.min_fling_velocity();
  34   config.maximum_fling_velocity = gesture_config.max_fling_velocity();
  35   config.swipe_enabled = gesture_config.swipe_enabled();
  36   config.minimum_swipe_velocity = gesture_config.min_swipe_velocity();
  37   config.maximum_swipe_deviation_angle =
  38       gesture_config.max_swipe_deviation_angle();
  39   config.two_finger_tap_enabled = gesture_config.two_finger_tap_enabled();
  40   config.two_finger_tap_max_separation =
  41       gesture_config.max_distance_for_two_finger_tap_in_pixels();
  42   config.two_finger_tap_timeout = base::TimeDelta::FromMilliseconds(
  43       gesture_config.max_touch_down_duration_for_click_in_ms());
  44   config.velocity_tracker_strategy = gesture_config.velocity_tracker_strategy();
  45   return config;
  46 }
  47
  48 ScaleGestureDetector::Config BuildScaleGestureDetectorConfig(
  49     const GestureConfiguration& gesture_config) {
  50   ScaleGestureDetector::Config config;
  51   config.span_slop = gesture_config.span_slop();
  52   config.min_scaling_touch_major = gesture_config.min_scaling_touch_major();
  53   config.min_scaling_span = gesture_config.min_scaling_span_in_pixels();
  54   config.min_pinch_update_span_delta =
  55       gesture_config.min_pinch_update_span_delta();
  56   return config;
  57 }
  58
  59 GestureProvider::Config BuildGestureProviderConfig(
  60     const GestureConfiguration& gesture_config) {
  61   GestureProvider::Config config;
  62   config.gesture_detector_config = BuildGestureDetectorConfig(gesture_config);
  63   config.scale_gesture_detector_config =
  64       BuildScaleGestureDetectorConfig(gesture_config);
  65   config.gesture_begin_end_types_enabled =
  66       gesture_config.gesture_begin_end_types_enabled();
  67   config.min_gesture_bounds_length = gesture_config.min_gesture_bounds_length();
  68   config.max_gesture_bounds_length = gesture_config.max_gesture_bounds_length();
  69   return config;
  70 }
  71
  72 }  // namespace
  73
  74 GestureProvider::Config GetGestureProviderConfig(
  75     GestureProviderConfigType type) {
  76   GestureProvider::Config config;
  77   switch (type) {
  78     case GestureProviderConfigType::CURRENT_PLATFORM:
  79       config = BuildGestureProviderConfig(*GestureConfiguration::GetInstance());
  80       break;
  81     case GestureProviderConfigType::GENERIC_DESKTOP:
  82       config = BuildGestureProviderConfig(GenericDesktopGestureConfiguration());
  83       break;
  84     case GestureProviderConfigType::GENERIC_MOBILE:
  85       // The default GestureProvider::Config embeds a mobile configuration.
  86       break;
  87   }
  88
  89   gfx::Screen* screen = gfx::Screen::GetScreenByType(gfx::SCREEN_TYPE_NATIVE);
  90   // |screen| is sometimes NULL during tests.
  91   if (screen)
  92     config.display = screen->GetPrimaryDisplay();
  93
  94   return config;
  95 }
  96
  97 }  // namespace ui