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/gfx/android/view_configuration.h" 6 7 #include "base/android/jni_android.h" 8 #include "base/lazy_instance.h" 9 #include "base/threading/non_thread_safe.h" 10 #include "jni/ViewConfigurationHelper_jni.h" 11 12 using base::android::AttachCurrentThread; 13 using base::android::GetApplicationContext; 14 15 namespace gfx { 16 17 namespace { 18 19 struct ViewConfigurationData { 20 ViewConfigurationData() 21 : double_tap_timeout_in_ms_(0), 22 long_press_timeout_in_ms_(0), 23 tap_timeout_in_ms_(0), 24 scroll_friction_(1.f), 25 max_fling_velocity_in_pixels_s_(0), 26 min_fling_velocity_in_pixels_s_(0), 27 touch_slop_in_pixels_(0), 28 double_tap_slop_in_pixels_(0), 29 min_scaling_span_in_pixels_(0), 30 min_scaling_touch_major_in_pixels_(0) { 31 JNIEnv* env = AttachCurrentThread(); 32 j_view_configuration_helper_.Reset( 33 Java_ViewConfigurationHelper_createWithListener( 34 env, base::android::GetApplicationContext())); 35 36 double_tap_timeout_in_ms_ = 37 Java_ViewConfigurationHelper_getDoubleTapTimeout(env); 38 long_press_timeout_in_ms_ = 39 Java_ViewConfigurationHelper_getLongPressTimeout(env); 40 tap_timeout_in_ms_ = Java_ViewConfigurationHelper_getTapTimeout(env); 41 scroll_friction_ = Java_ViewConfigurationHelper_getScrollFriction(env); 42 43 jobject obj = j_view_configuration_helper_.obj(); 44 Update( 45 Java_ViewConfigurationHelper_getScaledMaximumFlingVelocity(env, obj), 46 Java_ViewConfigurationHelper_getScaledMinimumFlingVelocity(env, obj), 47 Java_ViewConfigurationHelper_getScaledTouchSlop(env, obj), 48 Java_ViewConfigurationHelper_getScaledDoubleTapSlop(env, obj), 49 Java_ViewConfigurationHelper_getScaledMinScalingSpan(env, obj), 50 Java_ViewConfigurationHelper_getScaledMinScalingTouchMajor(env, obj)); 51 } 52 53 ~ViewConfigurationData() {} 54 55 void SynchronizedUpdate(int scaled_maximum_fling_velocity, 56 int scaled_minimum_fling_velocity, 57 int scaled_touch_slop, 58 int scaled_double_tap_slop, 59 int scaled_min_scaling_span, 60 int scaled_min_scaling_touch_major) { 61 base::AutoLock autolock(lock_); 62 Update(scaled_maximum_fling_velocity, 63 scaled_minimum_fling_velocity, 64 scaled_touch_slop, 65 scaled_double_tap_slop, 66 scaled_min_scaling_span, 67 scaled_min_scaling_touch_major); 68 } 69 70 int double_tap_timeout_in_ms() const { return double_tap_timeout_in_ms_; } 71 int long_press_timeout_in_ms() const { return long_press_timeout_in_ms_; } 72 int tap_timeout_in_ms() const { return tap_timeout_in_ms_; } 73 float scroll_friction() const { return scroll_friction_; } 74 75 int max_fling_velocity_in_pixels_s() { 76 base::AutoLock autolock(lock_); 77 return max_fling_velocity_in_pixels_s_; 78 } 79 80 int min_fling_velocity_in_pixels_s() { 81 base::AutoLock autolock(lock_); 82 return min_fling_velocity_in_pixels_s_; 83 } 84 85 int touch_slop_in_pixels() { 86 base::AutoLock autolock(lock_); 87 return touch_slop_in_pixels_; 88 } 89 90 int double_tap_slop_in_pixels() { 91 base::AutoLock autolock(lock_); 92 return double_tap_slop_in_pixels_; 93 } 94 95 int min_scaling_span_in_pixels() { 96 base::AutoLock autolock(lock_); 97 return min_scaling_span_in_pixels_; 98 } 99 100 int min_scaling_touch_major_in_pixels() { 101 base::AutoLock autolock(lock_); 102 return min_scaling_touch_major_in_pixels_; 103 } 104 105 private: 106 void Update(int scaled_maximum_fling_velocity, 107 int scaled_minimum_fling_velocity, 108 int scaled_touch_slop, 109 int scaled_double_tap_slop, 110 int scaled_min_scaling_span, 111 int scaled_min_scaling_touch_major) { 112 DCHECK_LE(scaled_minimum_fling_velocity, scaled_maximum_fling_velocity); 113 max_fling_velocity_in_pixels_s_ = scaled_maximum_fling_velocity; 114 min_fling_velocity_in_pixels_s_ = scaled_minimum_fling_velocity; 115 touch_slop_in_pixels_ = scaled_touch_slop; 116 double_tap_slop_in_pixels_ = scaled_double_tap_slop; 117 min_scaling_span_in_pixels_ = scaled_min_scaling_span; 118 min_scaling_touch_major_in_pixels_ = scaled_min_scaling_touch_major; 119 } 120 121 base::Lock lock_; 122 base::android::ScopedJavaGlobalRef<jobject> j_view_configuration_helper_; 123 124 // These values will remain constant throughout the lifetime of the app, so 125 // read-access needn't be synchronized. 126 int double_tap_timeout_in_ms_; 127 int long_press_timeout_in_ms_; 128 int tap_timeout_in_ms_; 129 float scroll_friction_; 130 131 // These values may vary as view-specific parameters (DPI scale) are changed, 132 // so read/write access must be synchronized. 133 int max_fling_velocity_in_pixels_s_; 134 int min_fling_velocity_in_pixels_s_; 135 int touch_slop_in_pixels_; 136 int double_tap_slop_in_pixels_; 137 int min_scaling_span_in_pixels_; 138 int min_scaling_touch_major_in_pixels_; 139 140 private: 141 DISALLOW_COPY_AND_ASSIGN(ViewConfigurationData); 142 }; 143 144 // Leaky to allow access from any thread. 145 base::LazyInstance<ViewConfigurationData>::Leaky g_view_configuration = 146 LAZY_INSTANCE_INITIALIZER; 147 148 } // namespace 149 150 static void UpdateSharedViewConfiguration(JNIEnv* env, 151 jobject obj, 152 jint scaled_maximum_fling_velocity, 153 jint scaled_minimum_fling_velocity, 154 jint scaled_touch_slop, 155 jint scaled_double_tap_slop, 156 jint scaled_min_scaling_span, 157 jint scaled_min_scaling_touch_major) { 158 g_view_configuration.Get().SynchronizedUpdate(scaled_maximum_fling_velocity, 159 scaled_minimum_fling_velocity, 160 scaled_touch_slop, 161 scaled_double_tap_slop, 162 scaled_min_scaling_span, 163 scaled_min_scaling_touch_major); 164 } 165 166 int ViewConfiguration::GetDoubleTapTimeoutInMs() { 167 return g_view_configuration.Get().double_tap_timeout_in_ms(); 168 } 169 170 int ViewConfiguration::GetLongPressTimeoutInMs() { 171 return g_view_configuration.Get().long_press_timeout_in_ms(); 172 } 173 174 int ViewConfiguration::GetTapTimeoutInMs() { 175 return g_view_configuration.Get().tap_timeout_in_ms(); 176 } 177 178 float ViewConfiguration::GetScrollFriction() { 179 return g_view_configuration.Get().scroll_friction(); 180 } 181 182 int ViewConfiguration::GetMaximumFlingVelocityInPixelsPerSecond() { 183 return g_view_configuration.Get().max_fling_velocity_in_pixels_s(); 184 } 185 186 int ViewConfiguration::GetMinimumFlingVelocityInPixelsPerSecond() { 187 return g_view_configuration.Get().min_fling_velocity_in_pixels_s(); 188 } 189 190 int ViewConfiguration::GetTouchSlopInPixels() { 191 return g_view_configuration.Get().touch_slop_in_pixels(); 192 } 193 194 int ViewConfiguration::GetDoubleTapSlopInPixels() { 195 return g_view_configuration.Get().double_tap_slop_in_pixels(); 196 } 197 198 int ViewConfiguration::GetMinScalingSpanInPixels() { 199 return g_view_configuration.Get().min_scaling_span_in_pixels(); 200 } 201 202 int ViewConfiguration::GetMinScalingTouchMajorInPixels() { 203 return g_view_configuration.Get().min_scaling_touch_major_in_pixels(); 204 } 205 206 bool ViewConfiguration::RegisterViewConfiguration(JNIEnv* env) { 207 return RegisterNativesImpl(env); 208 } 209 210 } // namespace gfx 211
