StoryPagerAdapter.java

/**
 * Copyright (c) 2015 unfoldingWord
 * http://creativecommons.org/licenses/MIT/
 * See LICENSE file for details.
 * Contributors:
 * PJ Fechner <pj@actsmedia.com>
 */

package adapters;

import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;

import com.squareup.picasso.Picasso;

import org.unfoldingword.mobile.R;

import java.util.List;

import de.greenrobot.event.EventBus;
import eventbusmodels.StoriesPagingEvent;
import model.daoModels.StoriesChapter;
import model.daoModels.StoryPage;
import utils.FileNameHelper;

/**
 * Created by Acts Media Inc on 5/12/14.
 * Adapter for OBS pages
 */
public class StoryPagerAdapter extends PagerAdapter {

    private static final String TAG = "ViewPagerAdapter";

    private Activity context;
    private ViewGroup container;
    private StoriesChapter mainChapter;
    private StoriesChapter secondChapter;

    private int lastChapterNumber = -1;
    private boolean isDiglot;
    private boolean isLandscape = false;
    private int textSize;

    //region setup
    public StoryPagerAdapter(Activity context, StoriesChapter mainChapter, StoriesChapter secondChapter, int textSize) {
        this.mainChapter = mainChapter;
        this.secondChapter = secondChapter;
        this.textSize = textSize;
        if(mainChapter != null) {
            List<StoriesChapter> chapters = mainChapter.getBook().getStoryChapters();
            lastChapterNumber = Integer.parseInt(chapters.get(chapters.size() -1 ).getNumber());
        }
        this.context = context;
    }

    //region data finding methods

    private StoryPage getMainModelForRow(int index){
        return mainChapter.getStoryPages().get(index);
    }

    private StoryPage getSecondModelForRow(int index){
        return secondChapter.getStoryPages().get(index);
    }

    public StoriesChapter getMainChapter() {
        return mainChapter;
    }

    public StoriesChapter getSecondChapter() {
        return secondChapter;
    }

    public void setTextSize(int textSize){
        this.textSize = textSize;
        notifyDataSetChanged();
    }
    //endregion

    //region pager methods

    @Override
    public Object instantiateItem(final ViewGroup container, final int position) {

        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        this.container = container;
        View view = null;

        if (position == getCount() - 1) {
            view = getNextChapterView(inflater);
        }
        if(view == null){

            StoryPage currentMainPage = getMainModelForRow(position);
            StoryPage currentSecondPage = getSecondModelForRow(position);
            int textColor = (isLandscape)? Color.WHITE : Color.BLACK;

            view = inflater.inflate(R.layout.stories_pager_layout, container, false);
            ImageView chapterImageView = (ImageView) view.findViewById(R.id.chapter_image_view);
            chapterImageView.setScaleType((isLandscape)? ImageView.ScaleType.CENTER_CROP : ImageView.ScaleType.FIT_CENTER);
//            chapterImageView.setAdjustViewBounds(true);

            TextView mainTextView = (TextView) view.findViewById(R.id.story_main_text_view);
            TextView secondaryTextView = (TextView) view.findViewById(R.id.story_secondary_text_view);
            mainTextView.setTextSize((float) textSize);
            secondaryTextView.setTextSize((float) textSize);
            mainTextView.setTextColor(textColor);
            secondaryTextView.setTextColor(textColor);

            mainTextView.setText(addTestText(currentMainPage.getText()));
            secondaryTextView.setText(addTestText(currentSecondPage.getText()));
            String imgUrl = mainChapter.getStoryPages().get(position).getImageUrl();
            String lastBitFromUrl = FileNameHelper.getLastBitFromUrl(imgUrl);
            String path = lastBitFromUrl.replaceAll("[{//:}]", "");

            Picasso.with(context).load("file:///android_asset/images/" + path).into(chapterImageView);
//            chapterImageView.setImageBitmap(ViewContentHelper.getBitmapFromAsset(context, "images/" + path));
            setupPageForDiglot(view.findViewById(R.id.middle_separator), secondaryTextView);

            LinearLayout linearLayout = (LinearLayout) view.findViewById(R.id.stories_reading_layout);
            RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(linearLayout.getLayoutParams());
            layoutParams.addRule(RelativeLayout.BELOW, (isLandscape) ? R.id.center_place_holder : R.id.chapter_image_view);
            linearLayout.setLayoutParams(layoutParams);

            int color = context.getResources().getColor((isLandscape)? R.color.clear_black : R.color.white);
            view.findViewById(R.id.stories_pager_first_scroll_view).setBackgroundColor(color);
            view.findViewById(R.id.stories_pager_second_scroll_view).setBackgroundColor(color);
        }
        container.addView(view);
        return view;
    }

    private String addTestText(String base){

//        for(int i = 0; i < 20; i++){
//            base = base + "this is some extras text\n";
//        }
        return base;
    }

    @Override
    public int getCount() {
        if(mainChapter == null){
            return 0;
        }
        if(Integer.parseInt(mainChapter.getNumber()) == lastChapterNumber){
            return (mainChapter != null)? mainChapter.getStoryPages().size() : 0;
        }
        else {
            return (mainChapter != null) ? mainChapter.getStoryPages().size() + 1 : 0;
        }
    }

    @Override
    public int getItemPosition(Object object) {
        return POSITION_NONE;
    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
        return view == object;
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        container.removeView((RelativeLayout) object);
    }

    private void setupPageForDiglot(View separatorView, TextView secondView){
        secondView.setVisibility((isDiglot)? View.VISIBLE : View.GONE);
        separatorView.setVisibility((isDiglot)? View.VISIBLE : View.GONE);
    }

    //endregion

    //region screen changing

    public void update(StoriesChapter mainChapter, StoriesChapter secondChapter){
        this.mainChapter = mainChapter;
        this.secondChapter = secondChapter;
        notifyDataSetChanged();
    }

    /**
     * Changes the layout based on whether the user wants the diglot view
     * @param isDiglot true if the user currently wantds diglot
     */
    public void setIsDiglot(boolean isDiglot){
        this.isDiglot = isDiglot;
        notifyDataSetChanged();
    }



    //endregion

    //region handling next chapter

    private View getNextChapterView(LayoutInflater inflater){

        View view = inflater.inflate(R.layout.next_chapter_screen_layout, container, false);
        Button nextButton = (Button) view.findViewById(R.id.next_chapter_screen_button);

        if(Integer.parseInt(mainChapter.getNumber()) == lastChapterNumber){
            return null;
        }
        else {
            String nextButtonString = context.getResources().getString(R.string.next_chapter);
            nextButton.setText(nextButtonString);
            nextButton.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    moveToNextChapter();
                }
            });
        }
        return view;
    }

    private void moveToNextChapter(){

        StoriesChapter nextChapter = mainChapter.getNextChapter();
        if(nextChapter != null){
            mainChapter = nextChapter;
            getCount();

            StoriesPagingEvent event = StoriesPagingEvent.getStickyEvent(context);

            secondChapter = event.secondaryStoryPage.getStoriesChapter().getBook().getStoriesChapterForNumber(nextChapter.getNumber());
            EventBus.getDefault().postSticky(new StoriesPagingEvent(nextChapter.getStoryPages().get(0), secondChapter.getStoryPages().get(0)));
            notifyDataSetChanged();
            ((ViewPager) this.container).setCurrentItem(0);
        }
    }

    //endregion

    /**
     * Lays the views out based on the change to/from landscape
     * @param isLandscape true if the view will now be landscape
     */
    public void setIsLandscape(boolean isLandscape){
        this.isLandscape = isLandscape;
        notifyDataSetChanged();
    }
}