WPCOMReaderPager.java

package org.wordpress.android;

import org.wordpress.android.WPCOMReaderBase.ChangeTopicListener;
import org.wordpress.android.WPCOMReaderBase.GetLastSelectedItemListener;
import org.wordpress.android.WPCOMReaderBase.GetLoadedItemsListener;
import org.wordpress.android.WPCOMReaderBase.GetPermalinkListener;
import org.wordpress.android.WPCOMReaderBase.UpdateButtonStatusListener;
import org.wordpress.android.WPCOMReaderBase.UpdateTopicIDListener;
import org.wordpress.android.WPCOMReaderBase.UpdateTopicTitleListener;
import org.wordpress.android.WPCOMReaderDetailPage.LoadExternalURLListener;
import org.wordpress.android.WPCOMReaderImpl.LoadDetailListener;
import org.wordpress.android.WPCOMReaderImpl.PostSelectedListener;
import org.wordpress.android.WPCOMReaderImpl.ShowTopicsListener;
import org.wordpress.android.util.WPViewPager;

import android.app.Dialog;
import android.content.Intent;
import android.content.res.Configuration;
import android.graphics.PixelFormat;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.ViewGroup;
import android.view.WindowManager;

public class WPCOMReaderPager extends FragmentActivity implements
		ChangeTopicListener, PostSelectedListener, UpdateTopicIDListener,
		UpdateTopicTitleListener, GetLoadedItemsListener,
		UpdateButtonStatusListener, ShowTopicsListener,
		LoadExternalURLListener, GetPermalinkListener,
		GetLastSelectedItemListener, LoadDetailListener {

	private WPViewPager readerPager;
	private ReaderPagerAdapter readerAdapter;
	private Fragment readerPage;
	private Fragment detailPage;
	private Fragment topicPage;
	private Fragment webPage;
	private Dialog topicsDialog;
	private boolean isShare;

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		getWindow().setFormat(PixelFormat.RGBA_8888);
		getWindow().addFlags(WindowManager.LayoutParams.FLAG_DITHER);
		if (WordPress.wpDB == null)
			WordPress.wpDB = new WordPressDB(this);
	}

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

		if (topicPage == null) {
			Log.i("WP", "topicPage was null");
			setContentView(R.layout.reader_wpcom_pager);

			readerPager = (WPViewPager) findViewById(R.id.pager);
			readerPager.setOffscreenPageLimit(3);

			readerAdapter = new ReaderPagerAdapter(
					super.getSupportFragmentManager());

			readerPager.setAdapter(readerAdapter);
			readerPager.setCurrentItem(1, true);
		}
	}

	@Override
	protected void onSaveInstanceState(Bundle outState) {

		super.onSaveInstanceState(outState);
		getSupportFragmentManager().putFragment(outState,
				WPCOMReaderImpl.class.getName(), readerPage);
		getSupportFragmentManager().putFragment(outState,
				WPCOMReaderTopicsSelector.class.getName(), topicPage);
		getSupportFragmentManager().putFragment(outState,
				WPCOMReaderDetailPage.class.getName(), detailPage);
		getSupportFragmentManager().putFragment(outState,
				WPCOMReaderWebPage.class.getName(), webPage);
	}

	private class ReaderPagerAdapter extends FragmentStatePagerAdapter {
		public ReaderPagerAdapter(FragmentManager fm) {
			super(fm);
		}

		@Override
		public int getCount() {
			return 4;
		}

		@Override
		public Fragment getItem(int location) {
			Fragment f = null;

			switch (location) {
			case 0:
				f = WPCOMReaderTopicsSelector.newInstance();
				topicPage = f;
				break;
			case 1:
				f = WPCOMReaderImpl.newInstance();
				readerPage = f;
				break;
			case 2:
				f = WPCOMReaderDetailPage.newInstance();
				detailPage = f;
				break;
			case 3:
				f = WPCOMReaderWebPage.newInstance();
				webPage = f;
				break;
			}

			return f;
		}

	}

	@Override
	public boolean onPrepareOptionsMenu(Menu menu) {

		menu.clear();
		menu.add(0, 0, 0, getResources().getText(R.string.home));
		MenuItem menuItem = menu.findItem(0);
		menuItem.setIcon(R.drawable.ic_menu_home);
		if (readerPager.getCurrentItem() > 1) {
			menu.add(0, 1, 0, getResources().getText(R.string.view_in_browser));
			menuItem = menu.findItem(1);
			menuItem.setIcon(android.R.drawable.ic_menu_view);
			menu.add(0, 2, 0, getResources().getText(R.string.share_link));
			menuItem = menu.findItem(2);
			menuItem.setIcon(android.R.drawable.ic_menu_share);
		}

		return super.onPrepareOptionsMenu(menu);
	}

	public boolean onOptionsItemSelected(final MenuItem item) {
		final WPCOMReaderWebPage readerWebPageFragment = (WPCOMReaderWebPage) webPage;
		final WPCOMReaderDetailPage readerPageDetailFragment = (WPCOMReaderDetailPage) detailPage;
		switch (item.getItemId()) {
		case 0:
			finish();
			break;
		case 1:
			if (readerPageDetailFragment != null
					&& readerPageDetailFragment != null) {
				if (readerPager.getCurrentItem() == 2) {
					runOnUiThread(new Runnable() {
						public void run() {
							readerPageDetailFragment.wv
									.loadUrl("javascript:Reader2.get_article_permalink();");
						}
					});

				} else {
					String url = readerWebPageFragment.wv.getUrl();
					if (url != null) {
						Uri uri = Uri.parse(url);
						if (uri != null) {
							Intent i = new Intent(Intent.ACTION_VIEW);
							i.setData(uri);
							startActivity(i);
						}
					}
				}
			}
			break;
		case 2:
			if (readerWebPageFragment != null
					&& readerPageDetailFragment != null) {
				if (readerPager.getCurrentItem() == 2) {
					runOnUiThread(new Runnable() {
						public void run() {
							isShare = true;
							readerPageDetailFragment.wv
									.loadUrl("javascript:Reader2.get_article_permalink();");
						}
					});

				} else {
					String url = readerWebPageFragment.wv.getUrl();
					if (url != null) {
						Intent share = new Intent(Intent.ACTION_SEND);
						share.setType("text/plain");
						share.putExtra(Intent.EXTRA_TEXT, url);
						startActivity(Intent.createChooser(share,
								getResources().getText(R.string.share_url)));
					}
				}
			}
			break;
		default:
			break;
		}
		return false;
	}

	@Override
	public void onConfigurationChanged(Configuration newConfig) {
		// ignore orientation change
		super.onConfigurationChanged(newConfig);
	}

	@Override
	public void onChangeTopic(String topicID, final String topicName) {

		final WPCOMReaderImpl readerPageFragment = (WPCOMReaderImpl) readerPage;
		readerPageFragment.topicsID = topicID;
		String methodCall = "Reader2.load_topic('" + topicID + "')";
		readerPageFragment.wv.loadUrl("javascript:" + methodCall);
		runOnUiThread(new Runnable() {
			public void run() {
				if (topicName != null) {
					readerPageFragment.topicTV.setText(topicName);
				}
				readerPager.setCurrentItem(1, true);
			}
		});
	}

	@Override
	public void onPostSelected(String requestedURL) {
		readerPager.setCurrentItem(2, true);
	}

	@Override
	public void onBackPressed() {
		if (readerPager.getCurrentItem() > 1)
			readerPager.setCurrentItem(readerPager.getCurrentItem() - 1, true);
		else
			super.onBackPressed();

	}

	@Override
	public void updateTopicTitle(final String topicTitle) {
		final WPCOMReaderImpl readerPageFragment = (WPCOMReaderImpl) readerPage;
		runOnUiThread(new Runnable() {
			public void run() {
				if (topicsDialog != null) {
					if (topicsDialog.isShowing())
						topicsDialog.cancel();
				}
				if (topicTitle != null) {
					readerPageFragment.topicTV.setText(topicTitle);
				}
				// readerPager.setCurrentItem(1, true);
			}
		});

	}

	@Override
	public void onUpdateTopicID(String topicID) {
		if (topicPage == null)
			topicPage = readerAdapter.getItem(0);
		final WPCOMReaderTopicsSelector topicsFragment = (WPCOMReaderTopicsSelector) topicPage;
		final String methodCall = "document.setSelectedTopic('" + topicID
				+ "')";
		runOnUiThread(new Runnable() {
			public void run() {
				if (topicsFragment.wv != null)
					topicsFragment.wv.loadUrl("javascript:" + methodCall);
			}
		});
	}

	@Override
	public void getLoadedItems(String items) {
		if (!items.equals("[]")) {
			final WPCOMReaderDetailPage readerPageDetailFragment = (WPCOMReaderDetailPage) detailPage;
			readerPageDetailFragment.readerItems = items;
			final String method = "Reader2.set_loaded_items("
					+ readerPageDetailFragment.readerItems + ")";
			runOnUiThread(new Runnable() {
				public void run() {
					readerPageDetailFragment.wv.loadUrl("javascript:" + method);
				}
			});
		}
	}

	@Override
	public void updateButtonStatus(final int button, final boolean enabled) {
		final WPCOMReaderDetailPage readerPageDetailFragment = (WPCOMReaderDetailPage) detailPage;
		runOnUiThread(new Runnable() {
			public void run() {
				readerPageDetailFragment.updateButtonStatus(button, enabled);
			}
		});

	}

	@Override
	public void showTopics() {
		WPCOMReaderTopicsSelector topicsFragment = (WPCOMReaderTopicsSelector) topicPage;
		((ViewGroup) topicsFragment.getView().getParent())
				.removeView(topicsFragment.getView());
		topicsDialog = new Dialog(this);
		topicsDialog.setContentView(topicsFragment.getView());
		topicsDialog.setTitle(getResources().getText(R.string.topics));
		topicsDialog.setCancelable(true);
		topicsDialog.show();
	}

	@Override
	public void loadExternalURL(String url) {
		WPCOMReaderWebPage readerWebPageFragment = (WPCOMReaderWebPage) webPage;
		readerWebPageFragment.wv.clearView();
		readerWebPageFragment.wv.loadUrl(url);
		readerPager.setCurrentItem(3, true);
	}

	@Override
	public void getPermalink(String permalink) {
		if (!permalink.equals("")) {
			if (isShare) {
				isShare = false;
				Intent share = new Intent(Intent.ACTION_SEND);
				share.setType("text/plain");
				share.putExtra(Intent.EXTRA_TEXT, permalink);
				startActivity(Intent.createChooser(share, getResources()
						.getText(R.string.share_link)));
			} else {
				Uri uri = Uri.parse(permalink);
				if (uri != null) {
					Intent i = new Intent(Intent.ACTION_VIEW);
					i.setData(uri);
					startActivity(i);
				}
			}
		}

	}

	@Override
	public void getLastSelectedItem(final String lastSelectedItem) {
		final WPCOMReaderDetailPage readerPageDetailFragment = (WPCOMReaderDetailPage) detailPage;
		runOnUiThread(new Runnable() {
			public void run() {
				String methodCall = "Reader2.show_article_details("
						+ lastSelectedItem + ")";
				if (readerPageDetailFragment.wv != null) {
					readerPageDetailFragment.wv.loadUrl("javascript:"
							+ methodCall);
					readerPageDetailFragment.wv
							.loadUrl("javascript:Reader2.is_next_item();");
					readerPageDetailFragment.wv
							.loadUrl("javascript:Reader2.is_prev_item();");
				}
			}
		});
	}

	@Override
	public void onLoadDetail() {
		final WPCOMReaderDetailPage readerPageDetailFragment = (WPCOMReaderDetailPage) detailPage;
		runOnUiThread(new Runnable() {
			public void run() {
				readerPageDetailFragment.wv.loadUrl(Constants.readerDetailURL);
			}
		});
	}
}