package org.fox.ttrss; import java.util.HashMap; import org.fox.ttrss.types.Article; import org.fox.ttrss.types.ArticleList; import org.fox.ttrss.types.Feed; import org.fox.ttrss.util.HeadlinesRequest; import com.google.gson.JsonElement; import android.app.Activity; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentStatePagerAdapter; import android.support.v4.view.ViewPager; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; public class ArticlePager extends Fragment { private final String TAG = "ArticlePager"; private PagerAdapter m_adapter; private HeadlinesEventListener m_onlineServices; private Article m_article; private ArticleList m_articles; private OnlineActivity m_activity; private String m_searchQuery = ""; private class PagerAdapter extends FragmentStatePagerAdapter { public PagerAdapter(FragmentManager fm) { super(fm); } @Override public Fragment getItem(int position) { Article article = m_articles.get(position); if (article != null) { ArticleFragment af = new ArticleFragment(article); return af; } return null; } @Override public int getCount() { return m_articles.size(); } } public ArticlePager() { super(); } public ArticlePager(Article article) { super(); m_article = article; } public void setSearchQuery(String searchQuery) { m_searchQuery = searchQuery; } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.article_pager, container, false); if (savedInstanceState != null) { m_articles = savedInstanceState.getParcelable("articles"); m_article = savedInstanceState.getParcelable("article"); } m_adapter = new PagerAdapter(getActivity().getSupportFragmentManager()); ViewPager pager = (ViewPager) view.findViewById(R.id.article_pager); int position = m_articles.indexOf(m_article); pager.setAdapter(m_adapter); pager.setCurrentItem(position); pager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() { @Override public void onPageScrollStateChanged(int arg0) { } @Override public void onPageScrolled(int arg0, float arg1, int arg2) { } @Override public void onPageSelected(int position) { Article article = m_articles.get(position); if (article != null) { m_article = article; if (article.unread) { article.unread = false; m_activity.saveArticleUnread(article); } m_onlineServices.onArticleSelected(article, false); //Log.d(TAG, "Page #" + position + "/" + m_adapter.getCount()); if (position == m_adapter.getCount() - 5) { Log.d(TAG, "loading more articles..."); loadMoreArticles(); } } } }); return view; } @SuppressWarnings({ "unchecked", "serial" }) private void loadMoreArticles() { m_activity.setLoadingStatus(R.string.blank, true); HeadlinesRequest req = new HeadlinesRequest(getActivity().getApplicationContext(), m_activity) { protected void onPostExecute(JsonElement result) { super.onPostExecute(result); m_adapter.notifyDataSetChanged(); } }; final Feed feed = GlobalState.getInstance().m_activeFeed; final String sessionId = m_activity.getSessionId(); final boolean showUnread = m_activity.getUnreadArticlesOnly(); int skip = 0; for (Article a : m_articles) { if (a.unread) ++skip; } if (skip == 0) skip = m_articles.size(); final int fskip = skip; req.setOffset(skip); HashMap map = new HashMap() { { put("op", "getHeadlines"); put("sid", sessionId); put("feed_id", String.valueOf(feed.id)); put("show_content", "true"); put("include_attachments", "true"); put("limit", String.valueOf(HeadlinesFragment.HEADLINES_REQUEST_SIZE)); put("offset", String.valueOf(0)); put("view_mode", showUnread ? "adaptive" : "all_articles"); put("skip", String.valueOf(fskip)); if (feed.is_cat) put("is_cat", "true"); if (m_searchQuery != null && m_searchQuery.length() != 0) { put("search", m_searchQuery); put("search_mode", ""); put("match_on", "both"); } } }; req.execute(map); } @Override public void onSaveInstanceState(Bundle out) { super.onSaveInstanceState(out); out.putParcelable("articles", m_articles); out.putParcelable("article", m_article); } @Override public void onAttach(Activity activity) { super.onAttach(activity); m_onlineServices = (HeadlinesEventListener)activity; m_activity = (OnlineActivity)activity; m_articles = GlobalState.getInstance().m_loadedArticles; } @Override public void onResume() { super.onResume(); m_activity.initMenu(); } public Article getSelectedArticle() { return m_article; } public void setActiveArticle(Article article) { m_article = article; int position = m_articles.indexOf(m_article); ViewPager pager = (ViewPager) getView().findViewById(R.id.article_pager); pager.setCurrentItem(position); } }