Tusky/app/src/main/java/com/keylesspalace/tusky/ThemeUtils.java

/* Copyright 2017 Andrew Dawson
 *
 * This file is part of Tusky.
 *
 * Tusky is free software: you can redistribute it and/or modify it under the terms of the GNU
 * General Public License as published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
 * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
 * Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with Tusky. If not, see
 * <http://www.gnu.org/licenses/>. */

package com.keylesspalace.tusky;

import android.content.Context;
import android.graphics.Color;
import android.graphics.PorterDuff;
import android.graphics.drawable.Drawable;
import android.support.annotation.AttrRes;
import android.support.annotation.ColorInt;
import android.support.annotation.DrawableRes;
import android.support.v4.content.ContextCompat;
import android.util.TypedValue;
import android.widget.ImageView;

class ThemeUtils {
    static Drawable getDrawable(Context context, @AttrRes int attribute,
            @DrawableRes int fallbackDrawable) {
        TypedValue value = new TypedValue();
        @DrawableRes int resourceId;
        if (context.getTheme().resolveAttribute(attribute, value, true)) {
            resourceId = value.resourceId;
        } else {
            resourceId = fallbackDrawable;
        }
        return ContextCompat.getDrawable(context, resourceId);
    }

    static @DrawableRes int getDrawableId(Context context, @AttrRes int attribute,
            @DrawableRes int fallbackDrawableId) {
        TypedValue value = new TypedValue();
        if (context.getTheme().resolveAttribute(attribute, value, true)) {
            return value.resourceId;
        } else {
            return fallbackDrawableId;
        }
    }

    static @ColorInt int getColor(Context context, @AttrRes int attribute) {
        TypedValue value = new TypedValue();
        if (context.getTheme().resolveAttribute(attribute, value, true)) {
            return value.data;
        } else {
            return Color.BLACK;
        }
    }

    static void setImageViewTint(ImageView view, @AttrRes int attribute) {
        view.setColorFilter(getColor(view.getContext(), attribute), PorterDuff.Mode.SRC_IN);
    }

    static void setDrawableTint(Context context, Drawable drawable, @AttrRes int attribute) {
        drawable.setColorFilter(getColor(context, attribute), PorterDuff.Mode.SRC_IN);
    }
}