ui/mojo/init/ui_init.cc

   1 // Copyright 2015 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/mojo/init/ui_init.h"
   6
   7 #include "base/memory/singleton.h"
   8 #include "ui/mojo/init/screen_mojo.h"
   9
  10 #if defined(OS_ANDROID)
  11 #include "ui/events/gesture_detection/gesture_configuration.h"
  12 #endif
  13
  14 namespace ui {
  15 namespace mojo {
  16
  17 #if defined(OS_ANDROID)
  18 // TODO(sky): this needs to come from system.
  19 class GestureConfigurationMojo : public ui::GestureConfiguration {
  20  public:
  21   GestureConfigurationMojo() : GestureConfiguration() {
  22     set_double_tap_enabled(false);
  23     set_double_tap_timeout_in_ms(semi_long_press_time_in_ms());
  24     set_gesture_begin_end_types_enabled(true);
  25     set_min_gesture_bounds_length(default_radius());
  26     set_min_pinch_update_span_delta(0);
  27     set_min_scaling_touch_major(default_radius() * 2);
  28     set_velocity_tracker_strategy(
  29         ui::VelocityTracker::Strategy::LSQ2_RESTRICTED);
  30     set_span_slop(max_touch_move_in_pixels_for_click() * 2);
  31     set_swipe_enabled(true);
  32     set_two_finger_tap_enabled(true);
  33   }
  34
  35   ~GestureConfigurationMojo() override {}
  36
  37  private:
  38   DISALLOW_COPY_AND_ASSIGN(GestureConfigurationMojo);
  39 };
  40 #endif
  41
  42 UIInit::UIInit(const gfx::Size& screen_size_in_pixels, float device_pixel_ratio)
  43     : screen_(new ScreenMojo(screen_size_in_pixels, device_pixel_ratio)) {
  44   gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE, screen_.get());
  45 #if defined(OS_ANDROID)
  46   gesture_configuration_.reset(new GestureConfigurationMojo);
  47   ui::GestureConfiguration::SetInstance(gesture_configuration_.get());
  48 #endif
  49 }
  50
  51 UIInit::~UIInit() {
  52   gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE, nullptr);
  53 #if defined(OS_ANDROID)
  54   ui::GestureConfiguration::SetInstance(nullptr);
  55 #endif
  56 }
  57
  58 }  // namespace mojo
  59 }  // namespace ui