/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.support.v4.view;
import android.view.ViewConfiguration;
/**
* Helper for accessing features in {@link ViewConfiguration}
* introduced after API level 4 in a backwards compatible fashion.
*/
public final class ViewConfigurationCompat {
/**
* Interface for the full API.
*/
interface ViewConfigurationVersionImpl {
boolean hasPermanentMenuKey(ViewConfiguration config);
}
/**
* Interface implementation that doesn't use anything about v4 APIs.
*/
static class BaseViewConfigurationVersionImpl implements ViewConfigurationVersionImpl {
@Override
public boolean hasPermanentMenuKey(ViewConfiguration config) {
// Pre-HC devices will always have a menu button
return true;
}
}
/**
* Interface implementation for devices with at least v11 APIs.
*/
static class HoneycombViewConfigurationVersionImpl extends BaseViewConfigurationVersionImpl {
@Override
public boolean hasPermanentMenuKey(ViewConfiguration config) {
// There is no way to check on Honeycomb so we assume false
return false;
}
}
/**
* Interface implementation for devices with at least v14 APIs.
*/
static class IcsViewConfigurationVersionImpl extends HoneycombViewConfigurationVersionImpl {
@Override
public boolean hasPermanentMenuKey(ViewConfiguration config) {
return ViewConfigurationCompatICS.hasPermanentMenuKey(config);
}
}
/**
* Select the correct implementation to use for the current platform.
*/
static final ViewConfigurationVersionImpl IMPL;
static {
if (android.os.Build.VERSION.SDK_INT >= 14) {
IMPL = new IcsViewConfigurationVersionImpl();
} else if (android.os.Build.VERSION.SDK_INT >= 11) {
IMPL = new HoneycombViewConfigurationVersionImpl();
} else {
IMPL = new BaseViewConfigurationVersionImpl();
}
}
// -------------------------------------------------------------------
/**
* Call {@link ViewConfiguration#getScaledPagingTouchSlop()}.
*
* @deprecated Call {@link ViewConfiguration#getScaledPagingTouchSlop()} directly.
* This method will be removed in a future release.
*/
@Deprecated
public static int getScaledPagingTouchSlop(ViewConfiguration config) {
return config.getScaledPagingTouchSlop();
}
/**
* Report if the device has a permanent menu key available to the user, in a backwards
* compatible way.
*/
public static boolean hasPermanentMenuKey(ViewConfiguration config) {
return IMPL.hasPermanentMenuKey(config);
}
private ViewConfigurationCompat() {}
}