Added abilyty to open article links internally

OsmAnd/res/values/strings.xml

@@ -9,6 +9,7 @@
          3. All your modified/created strings are in the top of the file (to make easier find what\'s translated).
     PLEASE: Have a look at http://code.google.com/p/osmand/wiki/UIConsistency, it may really improve your and our work  :-)  Thx - Hardy
     -->
+    <string name="online_webpage_warning">This page is only available online. Do you wish to open it in a web browser?</string>
     <string name="images_cache">Images cache</string>
     <string name="delete_search_history">Delete search history</string>
     <string name="show_images">Show images</string>

OsmAnd/src/net/osmand/plus/wikivoyage/article/WikivoyageArticleDialogFragment.java

@@ -26,6 +26,7 @@ import net.osmand.IndexConstants;
 import net.osmand.plus.OsmandApplication;
 import net.osmand.plus.R;
 import net.osmand.plus.wikivoyage.WikivoyageBaseDialogFragment;
+import net.osmand.plus.wikivoyage.data.CustomWebViewClient;
 import net.osmand.plus.wikivoyage.data.WikivoyageArticle;
 import net.osmand.plus.wikivoyage.data.WikivoyageLocalDataHelper;
 import net.osmand.util.Algorithms;
@@ -122,6 +123,7 @@ public class WikivoyageArticleDialogFragment extends WikivoyageBaseDialogFragmen
 		contentWebView = (WebView) mainView.findViewById(R.id.content_web_view);
 		contentWebView.getSettings().setJavaScriptEnabled(true);
 		contentWebView.getSettings().setCacheMode(showImages ? WebSettings.LOAD_DEFAULT : WebSettings.LOAD_CACHE_ONLY);
+		contentWebView.setWebViewClient(new CustomWebViewClient(getActivity(), getFragmentManager()));
 
 		return mainView;
 	}

OsmAnd/src/net/osmand/plus/wikivoyage/data/CustomWebViewClient.java

@@ -0,0 +1,77 @@
+package net.osmand.plus.wikivoyage.data;
+
+
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.net.Uri;
+import android.support.v4.app.FragmentActivity;
+import android.support.v4.app.FragmentManager;
+import android.support.v7.app.AlertDialog;
+import android.webkit.WebView;
+import android.webkit.WebViewClient;
+
+import net.osmand.plus.OsmandApplication;
+import net.osmand.plus.R;
+import net.osmand.plus.wikivoyage.article.WikivoyageArticleDialogFragment;
+
+import java.io.UnsupportedEncodingException;
+import java.net.URLDecoder;
+
+/**
+ * Custom WebView client to handle the internal links.
+ */
+
+public class CustomWebViewClient extends WebViewClient {
+
+	private OsmandApplication app;
+	private FragmentManager mFragmentManager;
+	private Context mContext;
+
+	private static final String PAGE_PREFIX = "https://";
+	private static final String WEB_DOMAIN = ".wikivoyage.com/wiki/";
+
+	public CustomWebViewClient(FragmentActivity context, FragmentManager fm) {
+		app = (OsmandApplication) context.getApplication();
+		mFragmentManager = fm;
+		mContext = context;
+	}
+
+	@Override
+	public boolean shouldOverrideUrlLoading(WebView view, String url) {
+		if (url.contains(WEB_DOMAIN)) {
+			String lang = url.substring(url.indexOf(PAGE_PREFIX) + PAGE_PREFIX.length(), url.indexOf("."));
+			String articleName = url.replace(PAGE_PREFIX + lang + WEB_DOMAIN, "")
+					.replaceAll("_", " ");
+			try {
+				articleName = URLDecoder.decode(articleName, "UTF-8");
+			} catch (UnsupportedEncodingException e) {
+				e.printStackTrace();
+			}
+			long articleId = app.getWikivoyageDbHelper().getArticleId(articleName, lang);
+			if (articleId != 0) {
+				WikivoyageArticleDialogFragment.showInstance(app, mFragmentManager,
+						articleId, lang);
+			} else {
+				warnAboutExternalLoad(url);
+			}
+			return true;
+		}
+		warnAboutExternalLoad(url);
+		return true;
+	}
+
+	private void warnAboutExternalLoad(final String url) {
+		AlertDialog.Builder builder = new AlertDialog.Builder(mContext);
+		builder.setMessage(R.string.online_webpage_warning);
+		builder.setPositiveButton(R.string.shared_string_ok, new DialogInterface.OnClickListener() {
+			@Override
+			public void onClick(DialogInterface dialog, int which) {
+				Intent i = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
+				mContext.startActivity(i);
+			}
+		});
+		builder.setNegativeButton(R.string.shared_string_cancel, null);
+		builder.show();
+	}
+}

OsmAnd/src/net/osmand/plus/wikivoyage/data/WikivoyageDbHelper.java

@@ -223,6 +223,21 @@ public class WikivoyageDbHelper {
 		return res;
 	}
 
+	public long getArticleId(String title, String lang) {
+		long res = 0;
+		SQLiteConnection conn = openConnection();
+		if (conn != null) {
+			SQLiteCursor cursor = conn.rawQuery("SELECT " + ARTICLES_COL_CITY_ID + " FROM "
+					+ ARTICLES_TABLE_NAME + " WHERE " + ARTICLES_COL_TITLE + " = ? AND "
+					+ ARTICLES_COL_LANG + " = ?", new String[]{title, lang});
+			if (cursor.moveToFirst()) {
+				res = cursor.getLong(0);
+			}
+			cursor.close();
+		}
+		return res;
+	}
+
 	@NonNull
 	public ArrayList<String> getArticleLangs(long cityId) {
 		ArrayList<String> res = new ArrayList<>();