1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/gfx/android/view_configuration.h"
#include "base/android/jni_android.h"
#include "base/lazy_instance.h"
#include "base/threading/non_thread_safe.h"
#include "jni/ViewConfigurationHelper_jni.h"
using base::android::AttachCurrentThread;
using base::android::GetApplicationContext;
namespace gfx {
namespace {
struct ViewConfigurationData {
ViewConfigurationData()
: double_tap_timeout_in_ms_(0),
long_press_timeout_in_ms_(0),
tap_timeout_in_ms_(0),
scroll_friction_(1.f),
max_fling_velocity_in_pixels_s_(0),
min_fling_velocity_in_pixels_s_(0),
touch_slop_in_pixels_(0),
double_tap_slop_in_pixels_(0),
min_scaling_span_in_pixels_(0),
min_scaling_touch_major_in_pixels_(0) {
JNIEnv* env = AttachCurrentThread();
j_view_configuration_helper_.Reset(
Java_ViewConfigurationHelper_createWithListener(
env, base::android::GetApplicationContext()));
double_tap_timeout_in_ms_ =
Java_ViewConfigurationHelper_getDoubleTapTimeout(env);
long_press_timeout_in_ms_ =
Java_ViewConfigurationHelper_getLongPressTimeout(env);
tap_timeout_in_ms_ = Java_ViewConfigurationHelper_getTapTimeout(env);
scroll_friction_ = Java_ViewConfigurationHelper_getScrollFriction(env);
jobject obj = j_view_configuration_helper_.obj();
Update(
Java_ViewConfigurationHelper_getScaledMaximumFlingVelocity(env, obj),
Java_ViewConfigurationHelper_getScaledMinimumFlingVelocity(env, obj),
Java_ViewConfigurationHelper_getScaledTouchSlop(env, obj),
Java_ViewConfigurationHelper_getScaledDoubleTapSlop(env, obj),
Java_ViewConfigurationHelper_getScaledMinScalingSpan(env, obj),
Java_ViewConfigurationHelper_getScaledMinScalingTouchMajor(env, obj));
}
~ViewConfigurationData() {}
void SynchronizedUpdate(int scaled_maximum_fling_velocity,
int scaled_minimum_fling_velocity,
int scaled_touch_slop,
int scaled_double_tap_slop,
int scaled_min_scaling_span,
int scaled_min_scaling_touch_major) {
base::AutoLock autolock(lock_);
Update(scaled_maximum_fling_velocity,
scaled_minimum_fling_velocity,
scaled_touch_slop,
scaled_double_tap_slop,
scaled_min_scaling_span,
scaled_min_scaling_touch_major);
}
int double_tap_timeout_in_ms() const { return double_tap_timeout_in_ms_; }
int long_press_timeout_in_ms() const { return long_press_timeout_in_ms_; }
int tap_timeout_in_ms() const { return tap_timeout_in_ms_; }
float scroll_friction() const { return scroll_friction_; }
int max_fling_velocity_in_pixels_s() {
base::AutoLock autolock(lock_);
return max_fling_velocity_in_pixels_s_;
}
int min_fling_velocity_in_pixels_s() {
base::AutoLock autolock(lock_);
return min_fling_velocity_in_pixels_s_;
}
int touch_slop_in_pixels() {
base::AutoLock autolock(lock_);
return touch_slop_in_pixels_;
}
int double_tap_slop_in_pixels() {
base::AutoLock autolock(lock_);
return double_tap_slop_in_pixels_;
}
int min_scaling_span_in_pixels() {
base::AutoLock autolock(lock_);
return min_scaling_span_in_pixels_;
}
int min_scaling_touch_major_in_pixels() {
base::AutoLock autolock(lock_);
return min_scaling_touch_major_in_pixels_;
}
private:
void Update(int scaled_maximum_fling_velocity,
int scaled_minimum_fling_velocity,
int scaled_touch_slop,
int scaled_double_tap_slop,
int scaled_min_scaling_span,
int scaled_min_scaling_touch_major) {
DCHECK_LE(scaled_minimum_fling_velocity, scaled_maximum_fling_velocity);
max_fling_velocity_in_pixels_s_ = scaled_maximum_fling_velocity;
min_fling_velocity_in_pixels_s_ = scaled_minimum_fling_velocity;
touch_slop_in_pixels_ = scaled_touch_slop;
double_tap_slop_in_pixels_ = scaled_double_tap_slop;
min_scaling_span_in_pixels_ = scaled_min_scaling_span;
min_scaling_touch_major_in_pixels_ = scaled_min_scaling_touch_major;
}
base::Lock lock_;
base::android::ScopedJavaGlobalRef<jobject> j_view_configuration_helper_;
// These values will remain constant throughout the lifetime of the app, so
// read-access needn't be synchronized.
int double_tap_timeout_in_ms_;
int long_press_timeout_in_ms_;
int tap_timeout_in_ms_;
float scroll_friction_;
// These values may vary as view-specific parameters (DPI scale) are changed,
// so read/write access must be synchronized.
int max_fling_velocity_in_pixels_s_;
int min_fling_velocity_in_pixels_s_;
int touch_slop_in_pixels_;
int double_tap_slop_in_pixels_;
int min_scaling_span_in_pixels_;
int min_scaling_touch_major_in_pixels_;
private:
DISALLOW_COPY_AND_ASSIGN(ViewConfigurationData);
};
// Leaky to allow access from any thread.
base::LazyInstance<ViewConfigurationData>::Leaky g_view_configuration =
LAZY_INSTANCE_INITIALIZER;
} // namespace
static void UpdateSharedViewConfiguration(JNIEnv* env,
jobject obj,
jint scaled_maximum_fling_velocity,
jint scaled_minimum_fling_velocity,
jint scaled_touch_slop,
jint scaled_double_tap_slop,
jint scaled_min_scaling_span,
jint scaled_min_scaling_touch_major) {
g_view_configuration.Get().SynchronizedUpdate(scaled_maximum_fling_velocity,
scaled_minimum_fling_velocity,
scaled_touch_slop,
scaled_double_tap_slop,
scaled_min_scaling_span,
scaled_min_scaling_touch_major);
}
int ViewConfiguration::GetDoubleTapTimeoutInMs() {
return g_view_configuration.Get().double_tap_timeout_in_ms();
}
int ViewConfiguration::GetLongPressTimeoutInMs() {
return g_view_configuration.Get().long_press_timeout_in_ms();
}
int ViewConfiguration::GetTapTimeoutInMs() {
return g_view_configuration.Get().tap_timeout_in_ms();
}
float ViewConfiguration::GetScrollFriction() {
return g_view_configuration.Get().scroll_friction();
}
int ViewConfiguration::GetMaximumFlingVelocityInPixelsPerSecond() {
return g_view_configuration.Get().max_fling_velocity_in_pixels_s();
}
int ViewConfiguration::GetMinimumFlingVelocityInPixelsPerSecond() {
return g_view_configuration.Get().min_fling_velocity_in_pixels_s();
}
int ViewConfiguration::GetTouchSlopInPixels() {
return g_view_configuration.Get().touch_slop_in_pixels();
}
int ViewConfiguration::GetDoubleTapSlopInPixels() {
return g_view_configuration.Get().double_tap_slop_in_pixels();
}
int ViewConfiguration::GetMinScalingSpanInPixels() {
return g_view_configuration.Get().min_scaling_span_in_pixels();
}
int ViewConfiguration::GetMinScalingTouchMajorInPixels() {
return g_view_configuration.Get().min_scaling_touch_major_in_pixels();
}
bool ViewConfiguration::RegisterViewConfiguration(JNIEnv* env) {
return RegisterNativesImpl(env);
}
} // namespace gfx
|
