app/src/main/java/net/nashlegend/sourcewall/view/common/ScaledImage/ImageSource.java

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package net.nashlegend.sourcewall.view.common.ScaledImage;

import android.graphics.Bitmap;
import android.graphics.Rect;
import android.net.Uri;

import java.io.File;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;

/**
 * Helper class used to set the source and additional attributes from a variety of sources. Supports
 * use of a bitmap, asset, resource, external file or any other URI.
 * <p>
 * When you are using a preview image, you must set the dimensions of the full size image on the
 * ImageSource object for the full size image using the {@link #dimensions(int, int)} method.
 */
public final class ImageSource {

    static final String FILE_SCHEME = "file:///";
    static final String ASSET_SCHEME = "file:///android_asset/";

    private final Uri uri;
    private final Bitmap bitmap;
    private final Integer resource;
    private boolean tile;
    private int sWidth;
    private int sHeight;
    private Rect sRegion;
    private boolean cached;

    private ImageSource(Bitmap bitmap, boolean cached) {
        this.bitmap = bitmap;
        this.uri = null;
        this.resource = null;
        this.tile = false;
        this.sWidth = bitmap.getWidth();
        this.sHeight = bitmap.getHeight();
        this.cached = cached;
    }

    private ImageSource(Uri uri) {
        // #114 If file doesn't exist, attempt to url decode the URI and try again
        String uriString = uri.toString();
        if (uriString.startsWith(FILE_SCHEME)) {
            File uriFile = new File(uriString.substring(FILE_SCHEME.length() - 1));
            if (!uriFile.exists()) {
                try {
                    uri = Uri.parse(URLDecoder.decode(uriString, "UTF-8"));
                } catch (UnsupportedEncodingException e) {
                    // Fallback to encoded URI. This exception is not expected.
                }
            }
        }
        this.bitmap = null;
        this.uri = uri;
        this.resource = null;
        this.tile = true;
    }