net.soulwolf.widget.parallaxrefresh.Utils.java Source code

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Here is the source code for net.soulwolf.widget.parallaxrefresh.Utils.java

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/**
 * <pre>
 * Copyright 2015 Soulwolf Ching
 * Copyright 2015 The Android Open Source Project for ParallaxScrollView
 *
 * 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.
 * </pre>
 */
package net.soulwolf.widget.parallaxrefresh;

import android.os.Build;
import android.support.v4.view.ViewCompat;
import android.view.View;
import android.widget.AbsListView;

/**
 * author: Soulwolf Created on 2015/9/5 0:54.
 * email : Ching.Soulwolf@gmail.com
 */
class Utils {

    static boolean canChildScrollUp(View view) {
        if (view == null) {
            return false;
        }
        if (Build.VERSION.SDK_INT < 14) {
            if (view instanceof AbsListView) {
                final AbsListView absListView = (AbsListView) view;
                return absListView.getChildCount() > 0 && (absListView.getFirstVisiblePosition() > 0
                        || absListView.getChildAt(0).getTop() < absListView.getPaddingTop());
            } else {
                return ViewCompat.canScrollVertically(view, -1) || view.getScrollY() > 0;
            }
        } else {
            return ViewCompat.canScrollVertically(view, -1);
        }
    }

    static int minMax(int value, int min, int max) {
        return Math.max(min, Math.min(value, max));
    }

    static float minMax(float value, float min, float max) {
        return Math.max(min, Math.min(value, max));
    }
}