tdf#89705: provides callback for url handling on android.

Change-Id: Ie28cd768519fbdc305f98e1d764d05bd209951ca

android/Bootstrap/src/org/libreoffice/kit/Document.java

@@ -40,6 +40,8 @@ public class Document {
     public static final int CALLBACK_TEXT_SELECTION_START = 3;
     public static final int CALLBACK_TEXT_SELECTION_END = 4;
     public static final int CALLBACK_CURSOR_VISIBLE = 5;
+    // LOK_CALLBACK_GRAPHIC_SELECTION = 6
+    public static final int CALLBACK_HYPERLINK_CLICKED = 7;
 
     /**
      * Text selection types

android/experimental/LOAndroid3/src/java/org/libreoffice/LOKitTileProvider.java

@@ -5,6 +5,8 @@ import android.graphics.PointF;
 import android.graphics.RectF;
 import android.util.Log;
 import android.view.KeyEvent;
+import android.net.Uri;
+import android.content.Intent;
 
 import org.libreoffice.kit.DirectBufferAllocator;
 import org.libreoffice.kit.Document;
@@ -411,10 +413,24 @@ public class LOKitTileProvider implements TileProvider, Document.MessageCallback
      */
     @Override
     public void messageRetrieved(int messageID, String payload) {
+        /**
+         * Handles messages that do not require entering editing mode.
+         */
+        switch (messageID) {
+            case Document.CALLBACK_HYPERLINK_CLICKED:
+                if (!payload.startsWith("http://") &&
+                        !payload.startsWith("https://"))
+                    payload = "http://" + payload;
+
+                Intent url_intent = new Intent(Intent.ACTION_VIEW);
+                url_intent.setData(Uri.parse(payload));
+                LibreOfficeMainActivity.mAppContext.startActivity(url_intent);
+                return;
+        }
+
         if (!LOKitShell.isEditingEnabled()) {
             return;
         }
-
         mInvalidationHandler.processMessage(messageID, payload);
     }
 }

include/LibreOfficeKit/LibreOfficeKitEnums.h

@@ -94,7 +94,13 @@ typedef enum
      *
      * Rectangle format is the same as LOK_CALLBACK_INVALIDATE_TILES.
      */
-    LOK_CALLBACK_GRAPHIC_SELECTION
+    LOK_CALLBACK_GRAPHIC_SELECTION,
+
+    /**
+     * User clicked on an hyperlink that should be handled by other
+     * applications accordingly.
+     */
+    LOK_CALLBACK_HYPERLINK_CLICKED
 }
 LibreOfficeKitCallbackType;