net.yanzm.actionbarprogress.ThemeUtils.java Source code

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Here is the source code for net.yanzm.actionbarprogress.ThemeUtils.java

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/*
 * Copyright (C) 2016 Yuki Anzai
 *
 * 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 net.yanzm.actionbarprogress;

import android.content.Context;
import android.graphics.Color;
import android.support.annotation.NonNull;
import android.support.v4.content.ContextCompat;
import android.util.TypedValue;

public class ThemeUtils {

    public static int getDisabledThemeAttrColor(@NonNull Context context, int attr) {
        TypedValue typedValue = new TypedValue();
        context.getTheme().resolveAttribute(android.R.attr.disabledAlpha, typedValue, true);
        final float disabledAlpha = typedValue.getFloat();
        return getThemeAttrColor(context, attr, disabledAlpha);
    }

    public static int getThemeAttrColor(@NonNull Context context, int attr) {
        TypedValue typedValue = new TypedValue();
        if (context.getTheme().resolveAttribute(attr, typedValue, true)) {
            if (typedValue.type >= TypedValue.TYPE_FIRST_INT && typedValue.type <= TypedValue.TYPE_LAST_INT) {
                return typedValue.data;
            } else if (typedValue.type == TypedValue.TYPE_STRING) {
                return ContextCompat.getColor(context, typedValue.resourceId);
            }
        }
        return 0;
    }

    public static int getThemeAttrColor(@NonNull Context context, int attr, float alpha) {
        final int color = getThemeAttrColor(context, attr);
        final int originalAlpha = Color.alpha(color);

        // Return the color, multiplying the original alpha by the disabled value
        return (color & 0x00ffffff) | (Math.round(originalAlpha * alpha) << 24);
    }
}