show top changed message in articlepager

org.fox.ttrss/src/main/java/org/fox/ttrss/ArticleFragment.java

@@ -183,6 +183,17 @@ public class ArticleFragment extends Fragment  {
         m_contentView = view.findViewById(R.id.article_scrollview);
         m_customViewContainer = (FrameLayout) view.findViewById(R.id.article_fullscreen_video);
 
+        if (m_article.id == HeadlinesFragment.ARTICLE_SPECIAL_TOP_CHANGED) {
+            TextView statusMessage = (TextView) view.findViewById(R.id.article_status_message);
+            statusMessage.setText(R.string.headlines_row_top_changed);
+            statusMessage.setVisibility(View.VISIBLE);
+
+            view.findViewById(R.id.article_scrollview).setVisibility(View.GONE);
+            view.findViewById(R.id.article_fab).setVisibility(View.GONE);
+
+            return view;
+        }
+
         NotifyingScrollView scrollView = (NotifyingScrollView) view.findViewById(R.id.article_scrollview);
         m_fab = view.findViewById(R.id.article_fab);
 
@@ -422,7 +433,7 @@ public class ArticleFragment extends Fragment  {
 	}
 
     protected void renderContent(Bundle savedInstanceState) {
-        if (!isAdded()) return;
+        if (!isAdded() || m_web == null) return;
 
         Log.d(TAG, "renderContent: " + m_article.title);
 
@@ -545,14 +556,14 @@ public class ArticleFragment extends Fragment  {
     public void onPause() {
         super.onPause();
 
-        m_web.onPause();
+        if (m_web != null) m_web.onPause();
     }
 
     @Override
     public void onResume() {
         super.onResume();
 
-        m_web.onResume();
+        if (m_web != null) m_web.onResume();
     }
 
     public boolean inCustomView() {

org.fox.ttrss/src/main/java/org/fox/ttrss/ArticlePager.java

@@ -155,6 +155,11 @@ public class ArticlePager extends Fragment {
 				super.onPostExecute(result);
 				
 				if (result != null) {
+
+					if (m_topIdChanged) {
+						m_articles.add(new Article(HeadlinesFragment.ARTICLE_SPECIAL_TOP_CHANGED));
+					}
+
 					try {
 						m_adapter.notifyDataSetChanged();
 					} catch (BadParcelableException e) {
@@ -172,7 +177,7 @@ public class ArticlePager extends Fragment {
 							}
 						}
 					}
-					
+
 				} else {
 					if (m_lastError == ApiError.LOGIN_FAILED) {
 						m_activity.login(true);
@@ -254,6 +259,11 @@ public class ArticlePager extends Fragment {
 				}
 
 				if (checkTopId > 0) put("check_top_id", String.valueOf(checkTopId));
+
+				if (m_activity.getApiLevel() >= 12) {
+					put("include_header", "true");
+				}
+
 			}			 
 		};
 

org.fox.ttrss/src/main/java/org/fox/ttrss/HeadlinesFragment.java

@@ -93,6 +93,7 @@ public class HeadlinesFragment extends Fragment implements OnItemClickListener,
 
 	public static final int ARTICLE_SPECIAL_LOADMORE = -1;
 	public static final int ARTICLE_SPECIAL_SPACER = -2;
+	public static final int ARTICLE_SPECIAL_TOP_CHANGED = -3;
 
 	private final String TAG = this.getClass().getSimpleName();
 	
@@ -390,7 +391,7 @@ public class HeadlinesFragment extends Fragment implements OnItemClickListener,
 
             View layout = inflater.inflate(R.layout.headlines_footer, container, false);
 
-            layout.setLayoutParams(new ListView.LayoutParams(ListView.LayoutParams.MATCH_PARENT, screenHeight));
+			layout.setLayoutParams(new ListView.LayoutParams(ListView.LayoutParams.MATCH_PARENT, screenHeight));
 
             m_list.addFooterView(layout, null, false);
         }
@@ -539,11 +540,15 @@ public class HeadlinesFragment extends Fragment implements OnItemClickListener,
 
 					if (result != null) {
 						m_refreshInProgress = false;
-						m_articles.add(0, new Article(-2));
+						m_articles.add(0, new Article(ARTICLE_SPECIAL_SPACER));
 
 						if (m_articles.indexOf(m_activeArticle) == -1)
 							m_activeArticle = null;
 
+						if (m_topIdChanged) {
+							m_articles.add(new Article(ARTICLE_SPECIAL_TOP_CHANGED));
+						}
+
 						m_adapter.notifyDataSetChanged();
 						m_listener.onHeadlinesLoaded(fappend);
 
@@ -551,7 +556,7 @@ public class HeadlinesFragment extends Fragment implements OnItemClickListener,
 						// top headline content becomes partially obscured by the toolbar on phones
 						// (not reproducible on avd)
 						if (!fappend) m_list.smoothScrollToPosition(0);
-						
+
 					} else {
 						if (m_lastError == ApiError.LOGIN_FAILED) {
 							m_activity.login(true);
@@ -643,6 +648,10 @@ public class HeadlinesFragment extends Fragment implements OnItemClickListener,
 					}
 
 					if (checkTopId > 0) put("check_top_id", String.valueOf(checkTopId));
+
+					if (m_activity.getApiLevel() >= 12) {
+						put("include_header", "true");
+					}
 				}
 			};
 
@@ -695,8 +704,9 @@ public class HeadlinesFragment extends Fragment implements OnItemClickListener,
 		public static final int VIEW_SELECTED_UNREAD = 3;
 		public static final int VIEW_LOADMORE = 4;
 		public static final int VIEW_SPACER = 5;
+		public static final int VIEW_TOP_CHANGED = 6;
 		
-		public static final int VIEW_COUNT = VIEW_SPACER+1;
+		public static final int VIEW_COUNT = VIEW_TOP_CHANGED+1;
 		
 		private final Integer[] origTitleColors = new Integer[VIEW_COUNT];
 		private final int titleHighScoreUnreadColor;
@@ -754,6 +764,8 @@ public class HeadlinesFragment extends Fragment implements OnItemClickListener,
 
 			if (a.id == ARTICLE_SPECIAL_LOADMORE) {
 				return VIEW_LOADMORE;
+			} else if (a.id == ARTICLE_SPECIAL_TOP_CHANGED) {
+				return VIEW_TOP_CHANGED;
 			} else if (a.id == ARTICLE_SPECIAL_SPACER) {
 				return VIEW_SPACER;
 			} else if (m_activeArticle != null && a.id == m_activeArticle.id && a.unread) {
@@ -858,6 +870,9 @@ public class HeadlinesFragment extends Fragment implements OnItemClickListener,
 				case VIEW_SPACER:
 					layoutId = R.layout.fragment_dummy;
 					break;
+				case VIEW_TOP_CHANGED:
+					layoutId = R.layout.headlines_row_top_changed;
+					break;
 				case VIEW_UNREAD:
 					layoutId = m_compactLayoutMode ? R.layout.headlines_row_unread_compact : R.layout.headlines_row_unread;
 					break;
@@ -1705,7 +1720,7 @@ public class HeadlinesFragment extends Fragment implements OnItemClickListener,
 
     public void setArticles(ArticleList articles) {
         m_articles.clear();
-		m_articles.add(0, new Article(-2));
+		m_articles.add(0, new Article(ARTICLE_SPECIAL_SPACER));
         m_articles.addAll(articles);
         m_adapter.notifyDataSetChanged();
     }

org.fox.ttrss/src/main/java/org/fox/ttrss/OnlineActivity.java

@@ -1246,7 +1246,7 @@ public class OnlineActivity extends CommonActivity {
 		return true;
 	}
 	
-	protected int getApiLevel() {
+	public int getApiLevel() {
 		return Application.getInstance().m_apiLevel;
 	}
 	

org.fox.ttrss/src/main/java/org/fox/ttrss/util/HeadlinesRequest.java

@@ -1,10 +1,12 @@
 package org.fox.ttrss.util;
 
 import android.content.Context;
+import android.util.Log;
 
 import com.google.gson.Gson;
 import com.google.gson.JsonArray;
 import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
 import com.google.gson.reflect.TypeToken;
 
 import org.fox.ttrss.ApiRequest;
@@ -13,6 +15,7 @@ import org.fox.ttrss.OnlineActivity;
 import org.fox.ttrss.types.Article;
 import org.fox.ttrss.types.ArticleList;
 import org.fox.ttrss.types.Feed;
+import org.json.JSONObject;
 
 import java.lang.reflect.Type;
 import java.util.List;
@@ -27,7 +30,9 @@ public class HeadlinesRequest extends ApiRequest {
 	private OnlineActivity m_activity;
 	private ArticleList m_articles; // = new ArticleList(); //Application.getInstance().m_loadedArticles;
 	private Feed m_feed;
-	
+
+	protected boolean m_topIdChanged = false;
+
 	public HeadlinesRequest(Context context, OnlineActivity activity, final Feed feed, ArticleList articles) {
 		super(context);
 
@@ -48,9 +53,25 @@ public class HeadlinesRequest extends ApiRequest {
 				
 				JsonArray content = result.getAsJsonArray();
 				if (content != null) {
-					Type listType = new TypeToken<List<Article>>() {}.getType();
+					final List<Article> articles;
-					final List<Article> articles = new Gson().fromJson(content, listType);
+					final JsonObject header;
-					
+
+					if (m_activity.getApiLevel() >= 12) {
+						header = content.get(0).getAsJsonObject();
+
+						//Log.d(TAG, "headerID:" + header.get("top_id_changed"));
+
+						m_topIdChanged = header.get("top_id_changed") != null;
+
+						Type listType = new TypeToken<List<Article>>() {}.getType();
+						articles = new Gson().fromJson(content.get(1), listType);
+					} else {
+						header = null;
+
+						Type listType = new TypeToken<List<Article>>() {}.getType();
+						articles = new Gson().fromJson(content, listType);
+					}
+
 					if (m_offset == 0) {
 						m_articles.clear();
 					} else {

org.fox.ttrss/src/main/res/layout/fragment_article.xml

@@ -154,4 +154,12 @@
         android:src="@drawable/ic_action_web_site"
         />
 
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:text="[status message]"
+        android:id="@+id/article_status_message"
+        android:gravity="center"
+        android:visibility="gone" />
+
 </FrameLayout>

org.fox.ttrss/src/main/res/layout/headlines_row_top_changed.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/headlines_row_top_changed"
+    android:layout_width="fill_parent"
+    android:layout_height="wrap_content"
+    android:gravity="center"
+    android:padding="16dp"
+    android:orientation="horizontal" >
+
+
+    <TextView
+        android:id="@+id/top_changed_label"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:textColor="?headlineExcerptTextColor"
+        android:text="@string/headlines_row_top_changed" />
+
+</LinearLayout>

org.fox.ttrss/src/main/res/values/strings.xml

@@ -232,4 +232,5 @@
     <string name="video_player_open">Open video</string>
 
     <string name="flavor_image_prompt">(more images...)</string>
+    <string name="headlines_row_top_changed">New articles found, reload feed to continue.</string>
 </resources>