/*
 * Copyright (C) 2016 Olmo Gallegos Hernández.
 *
 * 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 es.voghdev.pdfviewpager.library;

import android.content.Context;
import android.content.res.TypedArray;
import android.os.Handler;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;

import java.io.File;

import es.voghdev.pdfviewpager.library.remote.DownloadFile;
import es.voghdev.pdfviewpager.library.remote.DownloadFileUrlConnectionImpl;
import es.voghdev.pdfviewpager.library.util.FileUtil;

public class RemotePDFViewPager extends ViewPager implements DownloadFile.Listener {
    protected Context context;
    protected DownloadFile downloadFile;
    protected DownloadFile.Listener listener;

    public RemotePDFViewPager(Context context, String pdfUrl, DownloadFile.Listener listener) {
        super(context);
        this.context = context;
        this.listener = listener;

        init(new DownloadFileUrlConnectionImpl(context, new Handler(), this), pdfUrl);
    }

    public RemotePDFViewPager(Context context, DownloadFile downloadFile, String pdfUrl, DownloadFile.Listener listener) {
        super(context);
        this.context = context;
        this.listener = listener;

        init(downloadFile, pdfUrl);
    }

    public RemotePDFViewPager(Context context, AttributeSet attrs) {
        super(context, attrs);
        this.context = context;

        init(attrs);
    }

    private void init(DownloadFile downloadFile, String pdfUrl) {
        setDownloader(downloadFile);
        downloadFile.download(pdfUrl,
                new File(context.getCacheDir(), FileUtil.extractFileNameFromURL(pdfUrl)).getAbsolutePath());
    }

    private void init(AttributeSet attrs) {
        if (attrs != null) {
            TypedArray a;

            a = context.obtainStyledAttributes(attrs, R.styleable.PDFViewPager);
            String pdfUrl = a.getString(R.styleable.PDFViewPager_pdfUrl);

            if (pdfUrl != null && pdfUrl.length() > 0) {
                init(new DownloadFileUrlConnectionImpl(context, new Handler(), this), pdfUrl);
            }

            a.recycle();
        }
    }

    public void setDownloader(DownloadFile downloadFile) {
        this.downloadFile = downloadFile;
    }

    @Override
    public void onSuccess(String url, String destinationPath) {
        listener.onSuccess(url, destinationPath);
    }

    @Override
    public void onFailure(Exception e) {
        listener.onFailure(e);
    }

    @Override
    public void onProgressUpdate(int progress, int total) {
        listener.onProgressUpdate(progress, total);
    }

    public class NullListener implements DownloadFile.Listener {
        public void onSuccess(String url, String destinationPath) {
            /* Empty */
        }

        public void onFailure(Exception e) {
            /* Empty */
        }

        public void onProgressUpdate(int progress, int total) {
            /* Empty */
        }
    }
}

@@ -1567,50 +1567,140 @@
 ext,
- DownloadFile downloadFile, String pdfUrl,
+%0A                              DownloadFile downloadFile,%0A                              String pdfUrl,%0A                             
  Dow

Fix checkstyle