tachiyomi/app/src/main/java/eu/kanade/mangafeed/ui/reader/ReaderActivity.java

package eu.kanade.mangafeed.ui.reader;

import android.content.Context;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.view.MotionEvent;
import android.view.View;
import android.view.WindowManager;
import android.widget.FrameLayout;
import android.widget.TextView;

import java.util.List;

import javax.inject.Inject;

import butterknife.Bind;
import butterknife.ButterKnife;
import eu.kanade.mangafeed.App;
import eu.kanade.mangafeed.R;
import eu.kanade.mangafeed.data.database.models.Chapter;
import eu.kanade.mangafeed.data.database.models.Manga;
import eu.kanade.mangafeed.data.preference.PreferencesHelper;
import eu.kanade.mangafeed.data.source.model.Page;
import eu.kanade.mangafeed.ui.base.activity.BaseRxActivity;
import eu.kanade.mangafeed.ui.reader.viewer.base.BaseReader;
import eu.kanade.mangafeed.ui.reader.viewer.horizontal.LeftToRightReader;
import eu.kanade.mangafeed.ui.reader.viewer.horizontal.RightToLeftReader;
import eu.kanade.mangafeed.ui.reader.viewer.vertical.VerticalReader;
import eu.kanade.mangafeed.ui.reader.viewer.webtoon.WebtoonReader;
import eu.kanade.mangafeed.util.ToastUtil;
import nucleus.factory.RequiresPresenter;

@RequiresPresenter(ReaderPresenter.class)
public class ReaderActivity extends BaseRxActivity<ReaderPresenter> {

    @Bind(R.id.page_number) TextView pageNumber;
    @Bind(R.id.reader) FrameLayout container;
    @Bind(R.id.toolbar) Toolbar toolbar;

    @Inject PreferencesHelper prefs;

    private BaseReader viewer;
    private ReaderMenu readerMenu;

    private int uiFlags;

    private static final int LEFT_TO_RIGHT = 1;
    private static final int RIGHT_TO_LEFT = 2;
    private static final int VERTICAL = 3;
    private static final int WEBTOON = 4;


    public static Intent newInstance(Context context) {
        return new Intent(context, ReaderActivity.class);
    }

    @Override
    public void onCreate(Bundle savedState) {
        super.onCreate(savedState);
        App.get(this).getComponent().inject(this);
        setContentView(R.layout.activity_reader);
        ButterKnife.bind(this);

        setupToolbar(toolbar);

        readerMenu = new ReaderMenu(this, prefs);
        createUiHideFlags();
        enableHardwareAcceleration();

        viewer = getViewer();
    }

    @Override
    protected void onResume() {
        super.onResume();
        hideSystemUI();
    }

    @Override
    protected void onPause() {
        getPresenter().setCurrentPage(viewer.getCurrentPosition());
        viewer.destroySubscriptions();
        super.onPause();
    }

    private void createUiHideFlags() {
        uiFlags |= View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
        if (prefs.isHideStatusBarSet())
            uiFlags |= View.SYSTEM_UI_FLAG_FULLSCREEN;
        if (Build.VERSION.SDK_INT > Build.VERSION_CODES.KITKAT)
            uiFlags |= View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
    }

    public void onChapterReady(List<Page> pages, Manga manga, Chapter chapter) {
        viewer.onPageListReady(pages);
        viewer.updatePageNumber();
        readerMenu.onChapterReady(pages.size(), manga, chapter);
    }

    public void onChapterError() {
        finish();
        ToastUtil.showShort(this, R.string.page_list_error);
    }

    public void onPageChanged(int currentPageIndex, int totalPages) {
        String page = (currentPageIndex + 1) + "/" + totalPages;
        pageNumber.setText(page);
        readerMenu.onPageChanged(currentPageIndex);
    }

    public void setSelectedPage(int pageIndex) {
        viewer.setSelectedPage(pageIndex);
    }

    public void hideSystemUI() {
        getWindow().getDecorView().setSystemUiVisibility(uiFlags);
    }

    public void enableHardwareAcceleration() {
        getWindow().setFlags(
                WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED,
                WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED);
    }

    public boolean onImageSingleTap(MotionEvent motionEvent) {
        return viewer.onImageTouch(motionEvent);
    }

    public void onCenterSingleTap() {
        readerMenu.toggle();
    }

    private BaseReader getViewer() {
        switch (prefs.getDefaultViewer()) {
            case LEFT_TO_RIGHT: default:
                return new LeftToRightReader(this, container);
            case RIGHT_TO_LEFT:
                return new RightToLeftReader(this, container);
            case VERTICAL:
                return new VerticalReader(this, container);
            case WEBTOON:
                return new WebtoonReader(this, container);
        }
    }

}