better handle moving back from nested feeds

src/org/fox/ttrss/FeedCategoriesFragment.java

@@ -457,8 +457,8 @@ public class FeedCategoriesFragment extends Fragment implements OnItemClickListe
 				}
 			}
 			
-			if (!m_activity.isSmallScreen())
+			//if (!m_activity.isSmallScreen())
-				m_selectedCat = cat;
+			//	m_selectedCat = cat;
 			
 			m_adapter.notifyDataSetChanged();
 		}

src/org/fox/ttrss/FeedsActivity.java

@@ -34,6 +34,7 @@ public class FeedsActivity extends OnlineActivity implements HeadlinesEventListe
 	protected long m_lastRefresh = 0;
 	
 	private boolean m_actionbarUpEnabled = false;
+	private int m_actionbarRevertDepth = 0;
 	
 	@SuppressLint("NewApi")
 	@Override
@@ -118,6 +119,7 @@ public class FeedsActivity extends OnlineActivity implements HeadlinesEventListe
 			}
 		} else { // savedInstanceState != null
 			m_actionbarUpEnabled = savedInstanceState.getBoolean("actionbarUpEnabled");
+			m_actionbarRevertDepth = savedInstanceState.getInt("actionbarRevertDepth");
 
 			if (!isSmallScreen()) {
 				// temporary hack because FeedsActivity doesn't track whether active feed is open
@@ -235,7 +237,8 @@ public class FeedsActivity extends OnlineActivity implements HeadlinesEventListe
 	}
 	
 	public void onCatSelected(FeedCategory cat, boolean openAsFeed) {
-
+		FeedCategoriesFragment fc = (FeedCategoriesFragment) getSupportFragmentManager().findFragmentByTag(FRAG_CATS);
+		
 		if (!openAsFeed) {
 			
 			if (isSmallScreen()) {
@@ -246,6 +249,10 @@ public class FeedsActivity extends OnlineActivity implements HeadlinesEventListe
 				startActivityForResult(intent, 0);
 				
 			} else {
+				if (fc != null) {
+					fc.setSelectedCategory(null);
+				}
+
 				FragmentTransaction ft = getSupportFragmentManager()
 						.beginTransaction();
 
@@ -255,8 +262,17 @@ public class FeedsActivity extends OnlineActivity implements HeadlinesEventListe
 
 				ft.addToBackStack(null);
 				ft.commit();
+				
+				getSupportActionBar().setDisplayHomeAsUpEnabled(true);
+				m_actionbarUpEnabled = true;
+				m_actionbarRevertDepth = m_actionbarRevertDepth + 1;
 			}
 		} else {
+			
+			if (fc != null) {
+				fc.setSelectedCategory(cat);
+			}
+
 			Feed feed = new Feed(cat.id, cat.title, true);
 			onFeedSelected(feed);
 		}
@@ -269,6 +285,18 @@ public class FeedsActivity extends OnlineActivity implements HeadlinesEventListe
 	@Override
 	public boolean onOptionsItemSelected(MenuItem item) {
 		switch (item.getItemId()) {
+		case android.R.id.home:
+			if (m_actionbarRevertDepth > 0) {
+				
+				m_actionbarRevertDepth = m_actionbarRevertDepth - 1;
+				m_actionbarUpEnabled = m_actionbarRevertDepth > 0;
+				getSupportActionBar().setDisplayHomeAsUpEnabled(m_actionbarUpEnabled);
+				
+				onBackPressed();
+			} else {
+				finish();				
+			}
+			return true;
 		case R.id.show_feeds:
 			setUnreadOnly(!getUnreadOnly());
 			initMenu();
@@ -297,6 +325,7 @@ public class FeedsActivity extends OnlineActivity implements HeadlinesEventListe
 		super.onSaveInstanceState(out);	
 		
 		out.putBoolean("actionbarUpEnabled", m_actionbarUpEnabled);
+		out.putInt("actionbarRevertDepth", m_actionbarRevertDepth);
 		
 		GlobalState.getInstance().save(out);
 	}

src/org/fox/ttrss/OnlineActivity.java

@@ -621,9 +621,9 @@ public class OnlineActivity extends CommonActivity {
 		final ArticlePager ap = (ArticlePager)getSupportFragmentManager().findFragmentByTag(FRAG_ARTICLE);
 
 		switch (item.getItemId()) {
-		case android.R.id.home:
+		/* case android.R.id.home:
 			finish();
-			return true;
+			return true; */
 		case R.id.subscribe_to_feed:
 			Intent subscribe = new Intent(OnlineActivity.this, SubscribeActivity.class);
 			startActivityForResult(subscribe, 0);

src/org/fox/ttrss/offline/OfflineActivity.java

@@ -169,9 +169,9 @@ public class OfflineActivity extends CommonActivity {
 				.findFragmentByTag(FRAG_ARTICLE);
 
 		switch (item.getItemId()) {
-		case android.R.id.home:
+		/* case android.R.id.home:
 			finish();
-			return true;
+			return true; */
 		case R.id.go_online:
 			switchOnline();
 			return true;	

src/org/fox/ttrss/offline/OfflineFeedCategoriesFragment.java

@@ -197,8 +197,8 @@ public class OfflineFeedCategoriesFragment extends Fragment implements OnItemCli
 					m_activity.onCatSelected(feedId);
 				}
 				
-				if (!m_activity.isSmallScreen())
+				/* if (!m_activity.isSmallScreen())
-					m_selectedCatId = feedId;
+					m_selectedCatId = feedId; */
 				
 				m_adapter.notifyDataSetChanged();
 			}

src/org/fox/ttrss/offline/OfflineFeedsActivity.java

@@ -24,6 +24,7 @@ public class OfflineFeedsActivity extends OfflineActivity implements OfflineHead
 	private final String TAG = this.getClass().getSimpleName();
 	
 	private boolean m_actionbarUpEnabled = false;
+	private int m_actionbarRevertDepth = 0;
 	
 	@SuppressLint("NewApi")
 	@Override
@@ -44,6 +45,7 @@ public class OfflineFeedsActivity extends OfflineActivity implements OfflineHead
 		if (savedInstanceState != null) {
 			
 			m_actionbarUpEnabled = savedInstanceState.getBoolean("actionbarUpEnabled");
+			m_actionbarRevertDepth = savedInstanceState.getInt("actionbarRevertDepth");
 			
 			if (m_actionbarUpEnabled) {
 				getSupportActionBar().setDisplayHomeAsUpEnabled(true);
@@ -127,6 +129,18 @@ public class OfflineFeedsActivity extends OfflineActivity implements OfflineHead
 	@Override
 	public boolean onOptionsItemSelected(MenuItem item) {
 		switch (item.getItemId()) {
+		case android.R.id.home:
+			if (m_actionbarRevertDepth > 0) {
+				
+				m_actionbarRevertDepth = m_actionbarRevertDepth - 1;
+				m_actionbarUpEnabled = m_actionbarRevertDepth > 0;
+				getSupportActionBar().setDisplayHomeAsUpEnabled(m_actionbarUpEnabled);
+				
+				onBackPressed();
+			} else {
+				finish();				
+			}
+			return true;
 		case R.id.show_feeds:
 			setUnreadOnly(!getUnreadOnly());
 			initMenu();
@@ -143,6 +157,7 @@ public class OfflineFeedsActivity extends OfflineActivity implements OfflineHead
 		super.onSaveInstanceState(out);
 
 		out.putBoolean("actionbarUpEnabled", m_actionbarUpEnabled);
+		out.putInt("actionbarRevertDepth", m_actionbarRevertDepth);
 		
 		GlobalState.getInstance().save(out);
 	}
@@ -179,7 +194,13 @@ public class OfflineFeedsActivity extends OfflineActivity implements OfflineHead
 	}
 	
 	public void onCatSelected(int catId, boolean openAsFeed) {
+		OfflineFeedCategoriesFragment fc = (OfflineFeedCategoriesFragment) getSupportFragmentManager().findFragmentByTag(FRAG_CATS);
+		
 		if (openAsFeed) {
+			if (fc != null) {
+				fc.setSelectedFeedId(catId);
+			}
+
 			onFeedSelected(catId, true, true);
 		} else {
 			if (isSmallScreen()) {
@@ -188,6 +209,10 @@ public class OfflineFeedsActivity extends OfflineActivity implements OfflineHead
 
 				startActivityForResult(intent, 0);		
 			} else {
+				if (fc != null) {
+					fc.setSelectedFeedId(-1);
+				}
+				
 				FragmentTransaction ft = getSupportFragmentManager()
 						.beginTransaction();
 
@@ -196,6 +221,10 @@ public class OfflineFeedsActivity extends OfflineActivity implements OfflineHead
 
 				ft.replace(R.id.feeds_fragment, ff, FRAG_FEEDS);
 				ft.addToBackStack(null);
+
+				getSupportActionBar().setDisplayHomeAsUpEnabled(true);
+				m_actionbarUpEnabled = true;
+				m_actionbarRevertDepth = m_actionbarRevertDepth + 1;
 				
 				ft.commit();
 			}
@@ -303,7 +332,9 @@ public class OfflineFeedsActivity extends OfflineActivity implements OfflineHead
 				intent.putExtra("isCat", hf.getFeedIsCat());
 				intent.putExtra("article", articleId);
 		 	   
-				startActivityForResult(intent, 0);	
+				startActivityForResult(intent, 0);
+
+				overridePendingTransition(R.anim.right_slide_in, 0);
 			}			
 		} else {
 			refresh();

src/org/fox/ttrss/offline/OfflineHeadlinesActivity.java

@@ -3,6 +3,8 @@ package org.fox.ttrss.offline;
 import org.fox.ttrss.GlobalState;
 import org.fox.ttrss.R;
 
+import com.actionbarsherlock.view.MenuItem;
+
 import android.annotation.SuppressLint;
 import android.content.Intent;
 import android.content.SharedPreferences;
@@ -13,6 +15,7 @@ import android.preference.PreferenceManager;
 import android.provider.BaseColumns;
 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentTransaction;
+import android.util.Log;
 import android.view.View;
 
 public class OfflineHeadlinesActivity extends OfflineActivity implements OfflineHeadlinesEventListener {
@@ -90,6 +93,19 @@ public class OfflineHeadlinesActivity extends OfflineActivity implements Offline
 		initMenu();
 	}
 
+	@Override
+	public boolean onOptionsItemSelected(MenuItem item) {
+		switch (item.getItemId()) {
+		case android.R.id.home:
+			finish();
+			overridePendingTransition(0, R.anim.right_slide_out);
+			return true;
+		default:
+			Log.d(TAG, "onOptionsItemSelected, unhandled id=" + item.getItemId());
+			return super.onOptionsItemSelected(item);
+		}
+	}
+	
 	@Override
 	public void onArticleSelected(int articleId, boolean open) {
 		SQLiteStatement stmt = getWritableDb().compileStatement(
@@ -142,4 +158,10 @@ public class OfflineHeadlinesActivity extends OfflineActivity implements Offline
 	public void onArticleSelected(int articleId) {
 		onArticleSelected(articleId, true);		
 	}
+
+	@Override
+	public void onBackPressed() {
+		super.onBackPressed();
+		overridePendingTransition(0, R.anim.right_slide_out);
+	}
 }