java/com/android/pump/widget/AspectRatioImageView.java

/*
 * Copyright 2018 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 com.android.pump.widget;

import android.content.Context;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;

import androidx.annotation.AttrRes;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.annotation.UiThread;

@UiThread
public class AspectRatioImageView extends UriImageView {
    public AspectRatioImageView(@NonNull Context context) {
        super(context);
    }

    public AspectRatioImageView(@NonNull Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
    }

    public AspectRatioImageView(@NonNull Context context, @Nullable AttributeSet attrs,
            @AttrRes int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);

        // TODO Make aspect ratio configurable
        int aspectWidth = 16;
        int aspectHeight = 9;

        Drawable drawable = getDrawable();
        if (drawable != null) {
            // TODO Landscape/Portrait preference should be configurable
            int intrinsicWidth = drawable.getIntrinsicWidth();
            int intrinsicHeight = drawable.getIntrinsicHeight();

            if (intrinsicWidth < intrinsicHeight) {
                aspectWidth = 2;
                aspectHeight = 3;
            }
        }

        int width = getMeasuredWidth();
        int height = width * aspectHeight / aspectWidth;
        setMeasuredDimension(width, height);
    }
}