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// Copyright 2014 The Chromium Authors
// 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/synchronization/lock.h"
// Must come after all headers that specialize FromJniType() / ToJniType().
#include "ui/gfx/gfx_jni_headers/ViewConfigurationHelper_jni.h"
using base::android::AttachCurrentThread;
using base::android::JavaParamRef;
namespace gfx {
namespace {
struct ViewConfigurationData {
ViewConfigurationData()
: double_tap_timeout_in_ms_(0),
long_press_timeout_in_ms_(0),
tap_timeout_in_ms_(0),
max_fling_velocity_in_dips_s_(0),
min_fling_velocity_in_dips_s_(0),
touch_slop_in_dips_(0),
double_tap_slop_in_dips_(0),
min_scaling_span_in_dips_(0) {
JNIEnv* env = AttachCurrentThread();
j_view_configuration_helper_.Reset(
Java_ViewConfigurationHelper_createWithListener(env));
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);
Update(Java_ViewConfigurationHelper_getMaximumFlingVelocity(
env, j_view_configuration_helper_),
Java_ViewConfigurationHelper_getMinimumFlingVelocity(
env, j_view_configuration_helper_),
Java_ViewConfigurationHelper_getTouchSlop(
env, j_view_configuration_helper_),
Java_ViewConfigurationHelper_getDoubleTapSlop(
env, j_view_configuration_helper_),
Java_ViewConfigurationHelper_getMinScalingSpan(
env, j_view_configuration_helper_));
}
ViewConfigurationData(const ViewConfigurationData&) = delete;
ViewConfigurationData& operator=(const ViewConfigurationData&) = delete;
~ViewConfigurationData() {}
void SynchronizedUpdate(float maximum_fling_velocity,
float minimum_fling_velocity,
float touch_slop,
float double_tap_slop,
float min_scaling_span) {
base::AutoLock autolock(lock_);
Update(maximum_fling_velocity, minimum_fling_velocity, touch_slop,
double_tap_slop, min_scaling_span);
}
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_; }
int max_fling_velocity_in_dips_s() {
base::AutoLock autolock(lock_);
return max_fling_velocity_in_dips_s_;
}
int min_fling_velocity_in_dips_s() {
base::AutoLock autolock(lock_);
return min_fling_velocity_in_dips_s_;
}
int touch_slop_in_dips() {
base::AutoLock autolock(lock_);
return touch_slop_in_dips_;
}
int double_tap_slop_in_dips() {
base::AutoLock autolock(lock_);
return double_tap_slop_in_dips_;
}
int min_scaling_span_in_dips() {
base::AutoLock autolock(lock_);
return min_scaling_span_in_dips_;
}
private:
void Update(float maximum_fling_velocity,
float minimum_fling_velocity,
float touch_slop,
float double_tap_slop,
float min_scaling_span) {
DCHECK_LE(minimum_fling_velocity, maximum_fling_velocity);
max_fling_velocity_in_dips_s_ = maximum_fling_velocity;
min_fling_velocity_in_dips_s_ = minimum_fling_velocity;
touch_slop_in_dips_ = touch_slop;
double_tap_slop_in_dips_ = double_tap_slop;
min_scaling_span_in_dips_ = min_scaling_span;
}
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_;
// These values may vary as view-specific parameters change, so read/write
// access must be synchronized.
int max_fling_velocity_in_dips_s_;
int min_fling_velocity_in_dips_s_;
int touch_slop_in_dips_;
int double_tap_slop_in_dips_;
int min_scaling_span_in_dips_;
};
// Leaky to allow access from any thread.
base::LazyInstance<ViewConfigurationData>::Leaky g_view_configuration =
LAZY_INSTANCE_INITIALIZER;
} // namespace
static void JNI_ViewConfigurationHelper_UpdateSharedViewConfiguration(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
jfloat maximum_fling_velocity,
jfloat minimum_fling_velocity,
jfloat touch_slop,
jfloat double_tap_slop,
jfloat min_scaling_span) {
g_view_configuration.Get().SynchronizedUpdate(
maximum_fling_velocity, minimum_fling_velocity, touch_slop,
double_tap_slop, min_scaling_span);
}
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();
}
int ViewConfiguration::GetMaximumFlingVelocityInDipsPerSecond() {
return g_view_configuration.Get().max_fling_velocity_in_dips_s();
}
int ViewConfiguration::GetMinimumFlingVelocityInDipsPerSecond() {
return g_view_configuration.Get().min_fling_velocity_in_dips_s();
}
int ViewConfiguration::GetTouchSlopInDips() {
return g_view_configuration.Get().touch_slop_in_dips();
}
int ViewConfiguration::GetDoubleTapSlopInDips() {
return g_view_configuration.Get().double_tap_slop_in_dips();
}
int ViewConfiguration::GetMinScalingSpanInDips() {
return g_view_configuration.Get().min_scaling_span_in_dips();
}
} // namespace gfx
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