add option to show oldest articles first in offline mode (closes #504)

res/values/strings.xml

@@ -143,4 +143,5 @@
     <string name="ssl_trust_any_host_long">Do not verify server hostname</string>
     <string name="ssl">SSL</string>
     <string name="error_ssl_hostname_rejected">Error: SSL hostname not verified</string>
+    <string name="offline_oldest_first">Show oldest articles first</string>
 </resources>

res/xml/preferences.xml

@@ -23,19 +23,19 @@
             android:title="@string/ttrss_url" >
         </EditTextPreference>
     </PreferenceCategory>
-    <PreferenceCategory android:title="@string/ssl" android:summary="blah blah blah" >  
+    <PreferenceCategory
+        android:summary="blah blah blah"
+        android:title="@string/ssl" >
         <CheckBoxPreference
             android:defaultValue="false"
             android:key="ssl_trust_any"
             android:summary="@string/ssl_trust_any_long"
             android:title="@string/ssl_trust_any" />
-        
         <CheckBoxPreference
             android:defaultValue="false"
             android:key="ssl_trust_any_host"
             android:summary="@string/ssl_trust_any_host_long"
             android:title="@string/ssl_trust_any_host" />
-        
     </PreferenceCategory>
     <PreferenceCategory android:title="@string/http_authentication" >
         <EditTextPreference
@@ -120,6 +120,10 @@
             android:key="offline_image_cache_enabled"
             android:summary="@string/offline_image_cache_enabled_summary"
             android:title="@string/offline_image_cache_enabled" />
+        <CheckBoxPreference
+            android:defaultValue="false"
+            android:key="offline_oldest_first"
+            android:title="@string/offline_oldest_first" />
     </PreferenceCategory>
     <PreferenceCategory android:title="@string/debugging" >
         <CheckBoxPreference

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

@@ -4,8 +4,10 @@ import org.fox.ttrss.R;
 import org.fox.ttrss.types.Article;
 
 import android.app.Activity;
+import android.content.SharedPreferences;
 import android.database.Cursor;
 import android.os.Bundle;
+import android.preference.PreferenceManager;
 import android.provider.BaseColumns;
 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentManager;
@@ -27,6 +29,7 @@ public class OfflineArticlePager extends Fragment {
 	private int m_articleId;
 	private String m_searchQuery = "";
 	private Cursor m_cursor;
+	private SharedPreferences m_prefs;
 	
 	public int getFeedId() {
 		return m_feedId;
@@ -45,15 +48,17 @@ public class OfflineArticlePager extends Fragment {
 			feedClause = "feed_id = ?";
 		}
 		
+		String orderBy = (m_prefs.getBoolean("offline_oldest_first", false)) ? "updated" : "updated DESC";
+		
 		if (m_searchQuery == null || m_searchQuery.equals("")) {
 			return m_activity.getReadableDb().query("articles LEFT JOIN feeds ON (feed_id = feeds."+BaseColumns._ID+")", 
 					new String[] { "articles."+BaseColumns._ID, "feeds.title AS feed_title" }, feedClause, 
-					new String[] { String.valueOf(m_feedId) }, null, null, "updated DESC");
+					new String[] { String.valueOf(m_feedId) }, null, null, orderBy);
 		} else {
 			return m_activity.getReadableDb().query("articles LEFT JOIN feeds ON (feed_id = feeds."+BaseColumns._ID+")", 
 					new String[] { "articles."+BaseColumns._ID },
 					feedClause + " AND (articles.title LIKE '%' || ? || '%' OR content LIKE '%' || ? || '%')", 
-					new String[] { String.valueOf(m_feedId), m_searchQuery, m_searchQuery }, null, null, "updated DESC");
+					new String[] { String.valueOf(m_feedId), m_searchQuery, m_searchQuery }, null, null, orderBy);
 		}
 	}
 	
@@ -172,6 +177,9 @@ public class OfflineArticlePager extends Fragment {
 		
 		m_activity = (OfflineActivity)activity;
 		m_listener = (OfflineHeadlinesEventListener)activity;
+		
+		m_prefs = PreferenceManager.getDefaultSharedPreferences(getActivity().getApplicationContext());
+		
 		m_cursor = createCursor();
 			
 	}

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

@@ -303,15 +303,17 @@ public class OfflineHeadlinesFragment extends Fragment implements OnItemClickLis
 			feedClause = "feed_id = ?";
 		}
 		
+		String orderBy = (m_prefs.getBoolean("offline_oldest_first", false)) ? "updated" : "updated DESC";
+		
 		if (m_searchQuery == null || m_searchQuery.equals("")) {
 			return m_activity.getReadableDb().query("articles LEFT JOIN feeds ON (feed_id = feeds."+BaseColumns._ID+")", 
 					new String[] { "articles.*", "feeds.title AS feed_title" }, feedClause, 
-					new String[] { String.valueOf(m_feedId) }, null, null, "updated DESC");
+					new String[] { String.valueOf(m_feedId) }, null, null, orderBy);
 		} else {
 			return m_activity.getReadableDb().query("articles LEFT JOIN feeds ON (feed_id = feeds."+BaseColumns._ID+")", 
 					new String[] { "articles.*", "feeds.title AS feed_title" },
 					feedClause + " AND (articles.title LIKE '%' || ? || '%' OR content LIKE '%' || ? || '%')", 
-					new String[] { String.valueOf(m_feedId), m_searchQuery, m_searchQuery }, null, null, "updated DESC");
+					new String[] { String.valueOf(m_feedId), m_searchQuery, m_searchQuery }, null, null, orderBy);
 		}
 	}