use viewpager-based article swiping for offline mode

src/org/fox/ttrss/ArticlePager.java

@@ -19,7 +19,7 @@ public class ArticlePager extends Fragment {
 	
 	private class PagerAdapter extends FragmentStatePagerAdapter {
 		
-		public PagerAdapter(FragmentManager fm,  Article article) {
+		public PagerAdapter(FragmentManager fm) {
 			super(fm);
 		}
 
@@ -55,12 +55,11 @@ public class ArticlePager extends Fragment {
 	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {    	
 		View view = inflater.inflate(R.layout.article_pager, container, false);
 	
-		m_adapter = new PagerAdapter(getActivity().getSupportFragmentManager(), m_onlineServices.getSelectedArticle());
+		m_adapter = new PagerAdapter(getActivity().getSupportFragmentManager());
 		
 		ViewPager pager = (ViewPager) view.findViewById(R.id.article_pager);
 		
-		HeadlinesFragment hf = (HeadlinesFragment)getActivity().getSupportFragmentManager().findFragmentById(R.id.headlines_fragment);
+		int position = m_hf.getArticlePosition(m_article);
-		int position = hf.getArticlePosition(m_article);
 		
 		pager.setAdapter(m_adapter);
 		pager.setCurrentItem(position);
@@ -79,9 +78,11 @@ public class ArticlePager extends Fragment {
 				Article article = m_hf.getArticleAtPosition(position);
 				
 				if (article != null) {
-					article.unread = false;
+					if (article.unread) {
+						article.unread = false;
+						m_onlineServices.saveArticleUnread(article);
+					}
 					m_onlineServices.setSelectedArticle(article);
-					m_onlineServices.saveArticleUnread(article);
 				}
 			}
 		});

src/org/fox/ttrss/MainActivity.java

@@ -1070,7 +1070,11 @@ public class MainActivity extends FragmentActivity implements OnlineServices {
 		m_selectedArticle = null;
 
 		initMainMenu();
-		refreshFeeds();
+		
+		if (!m_enableCats || m_activeCategory != null)
+			refreshFeeds();
+		else
+			refreshCategories();
 
 	}
 

src/org/fox/ttrss/OfflineActivity.java

@@ -14,6 +14,7 @@ import android.database.sqlite.SQLiteStatement;
 import android.os.Bundle;
 import android.preference.PreferenceManager;
 import android.provider.BaseColumns;
+import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentActivity;
 import android.support.v4.app.FragmentTransaction;
 import android.util.Log;
@@ -625,11 +626,12 @@ public class OfflineActivity extends FragmentActivity implements
 
 		}
 
+		// we don't want to lose selected article in headlines so we refresh them before setting selected id to 0
+		refreshViews();
+
 		m_selectedArticleId = 0;
 
 		initMainMenu();
-		refreshViews();
-
 	}
 
 	private int getSelectedArticleCount() {
@@ -990,7 +992,13 @@ public class OfflineActivity extends FragmentActivity implements
 		stmt.execute();
 		stmt.close();
 
-		OfflineArticleFragment frag = new OfflineArticleFragment();
+		Fragment frag;
+		
+		if (m_smallScreenMode) {
+			frag = new OfflineArticlePager(articleId);
+		} else {
+			frag = new OfflineArticleFragment(articleId);
+		}
 
 		FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
 		ft.replace(R.id.article_fragment, frag);
@@ -1020,4 +1028,10 @@ public class OfflineActivity extends FragmentActivity implements
 	public int getSelectedArticleId() {
 		return m_selectedArticleId;
 	}
+
+	@Override
+	public void setSelectedArticleId(int articleId) {
+		m_selectedArticleId = articleId;
+		refreshViews();
+	}
 }

src/org/fox/ttrss/OfflineArticleFragment.java

@@ -39,19 +39,23 @@ public class OfflineArticleFragment extends Fragment {
 
 	private SharedPreferences m_prefs;
 	private int m_articleId;
-	private int m_nextArticleId;
-	private int m_prevArticleId;
-
 	private Cursor m_cursor;
 	private OfflineServices m_offlineServices;
 	
+	public OfflineArticleFragment() {
+		super();
+	}
+	
+	public OfflineArticleFragment(int articleId) {
+		super();
+		m_articleId = articleId;
+	}
+
 	@Override
 	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {    	
 
 		if (savedInstanceState != null) {
 			m_articleId = savedInstanceState.getInt("articleId");
-			m_prevArticleId = savedInstanceState.getInt("prevArticleId");
-			m_nextArticleId = savedInstanceState.getInt("nextArticleId");
 		}
 		
 		View view = inflater.inflate(R.layout.article_fragment, container, false);
@@ -204,9 +208,6 @@ public class OfflineArticleFragment extends Fragment {
 		super.onSaveInstanceState(out);
 		
 		out.putInt("articleId", m_articleId);
-		out.putInt("prevArticleId", m_prevArticleId);
-		out.putInt("nextArticleId", m_nextArticleId);
-
 	}
 	
 	@Override
@@ -216,11 +217,6 @@ public class OfflineArticleFragment extends Fragment {
 		m_prefs = PreferenceManager.getDefaultSharedPreferences(getActivity().getApplicationContext());
 		
 		m_offlineServices = (OfflineServices)activity;
-		
-		m_articleId = m_offlineServices.getSelectedArticleId();
-		
-		m_prevArticleId = m_offlineServices.getRelativeArticleId(m_articleId, m_offlineServices.getActiveFeedId(), RelativeArticle.BEFORE);
-		m_nextArticleId = m_offlineServices.getRelativeArticleId(m_articleId, m_offlineServices.getActiveFeedId(), RelativeArticle.AFTER);
 	}
 
 

src/org/fox/ttrss/OfflineArticlePager.java

@@ -0,0 +1,108 @@
+package org.fox.ttrss;
+
+import android.app.Activity;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteStatement;
+import android.os.Bundle;
+import android.provider.BaseColumns;
+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.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+public class OfflineArticlePager extends Fragment {
+
+	private PagerAdapter m_adapter;
+	private OfflineServices m_offlineServices;
+	private OfflineHeadlinesFragment m_hf;
+	private int m_articleId;
+	
+	private class PagerAdapter extends FragmentStatePagerAdapter {
+		
+		public PagerAdapter(FragmentManager fm) {
+			super(fm);
+		}
+
+		@Override
+		public Fragment getItem(int position) {
+			int articleId = m_hf.getArticleIdAtPosition(position);
+			
+			if (articleId != 0) {
+				return new OfflineArticleFragment(articleId);
+			} 
+			
+			return null; 
+		}
+
+		@Override
+		public int getCount() {
+			return m_hf.getArticleCount();
+		}
+		
+	}
+	
+	public OfflineArticlePager() {
+		super();
+	}
+	
+	public OfflineArticlePager(int articleId) {
+		super();
+
+		m_articleId = articleId;
+	}
+	
+	@Override
+	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {    	
+		View view = inflater.inflate(R.layout.article_pager, container, false);
+	
+		m_adapter = new PagerAdapter(getActivity().getSupportFragmentManager());
+		
+		ViewPager pager = (ViewPager) view.findViewById(R.id.article_pager);
+		
+		int position = m_hf.getArticleIdPosition(m_articleId);
+		
+		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) {
+				int articleId = m_hf.getArticleIdAtPosition(position);
+				
+				if (articleId != 0) {
+					m_offlineServices.setSelectedArticleId(articleId);
+					
+					SQLiteStatement stmt = m_offlineServices.getWritableDb().compileStatement(
+							"UPDATE articles SET unread = 0 " + "WHERE " + BaseColumns._ID
+									+ " = ?");
+	
+					stmt.bindLong(1, articleId);
+					stmt.execute();
+					stmt.close();
+				}
+			}
+		});
+	
+		return view;
+	}
+	
+	@Override
+	public void onAttach(Activity activity) {
+		super.onAttach(activity);		
+		
+		m_hf = (OfflineHeadlinesFragment) getActivity().getSupportFragmentManager().findFragmentById(R.id.headlines_fragment);
+		m_offlineServices = (OfflineServices)activity;
+	}
+
+}

src/org/fox/ttrss/OfflineHeadlinesFragment.java

@@ -107,6 +107,7 @@ public class OfflineHeadlinesFragment extends Fragment implements OnItemClickLis
 		
 		if (m_cursor != null) {
 			m_adapter.changeCursor(m_cursor);
+			setActiveArticleId(m_offlineServices.getSelectedArticleId());
 			m_adapter.notifyDataSetChanged();
 		}
 	}
@@ -229,7 +230,9 @@ public class OfflineHeadlinesFragment extends Fragment implements OnItemClickLis
 		public int getItemViewType(int position) {
 			Cursor c = (Cursor) getItem(position);
 			
-			if (c.getLong(0) == m_activeArticleId) {
+			//Log.d(TAG, "@gIVT " + position + " " + c.getInt(0) + " vs " + m_activeArticleId);
+			
+			if (c.getInt(0) == m_activeArticleId) {
 				return VIEW_SELECTED;
 			} else if (c.getInt(c.getColumnIndex("unread")) == 1) {
 				return VIEW_UNREAD;
@@ -394,16 +397,15 @@ public class OfflineHeadlinesFragment extends Fragment implements OnItemClickLis
 		m_adapter.notifyDataSetChanged();
 	}
 
-	public void setActiveArticleId(int id) {
+	public void setActiveArticleId(int articleId) {
-		m_activeArticleId = id;
+		m_activeArticleId = articleId;
-		m_adapter.notifyDataSetChanged();
+	//	m_adapter.notifyDataSetChanged();
 		
-		/* ListView list = (ListView)getView().findViewById(R.id.headlines);
+		ListView list = (ListView)getView().findViewById(R.id.headlines);
 		
 		if (list != null) {
-			int position = m_adapter.getPosition(getArticleById(id));
+			list.setSelection(getArticleIdPosition(articleId));
-			list.setSelection(position);
+		} 
-		} */
 	}
 
 	public Cursor getArticleAtPosition(int position) {
@@ -411,18 +413,31 @@ public class OfflineHeadlinesFragment extends Fragment implements OnItemClickLis
 	}
 
 	public int getArticleIdAtPosition(int position) {
-		Cursor c = getArticleAtPosition(position);
+		/*Cursor c = getArticleAtPosition(position);
 		
 		if (c != null) {
 			int id = c.getInt(0);
 			return id;
-		}		
+		}		*/
 		
-		return 0;
+		return (int) m_adapter.getItemId(position);
 	}
 
 	public int getActiveArticleId() {
 		return m_activeArticleId;
 	}
 
+	public int getArticleIdPosition(int articleId) {
+		for (int i = 0; i < m_adapter.getCount(); i++) {
+			if (articleId == m_adapter.getItemId(i))
+				return i;
+		}
+		
+		return 0;
+	}
+	
+	public int getArticleCount() {
+		return m_adapter.getCount();
+	}
+	
 }

src/org/fox/ttrss/OfflineServices.java

@@ -13,4 +13,5 @@ public interface OfflineServices {
 	public int getSelectedArticleId();
 	public void initMainMenu();
 	public boolean isSmallScreen();
+	public void setSelectedArticleId(int articleId);
 }