android: Add support for callbacks from LO to JNI and Java LOK

This adds support to retrieve callbacks from LibreOffice (like
for example that a part of document has been invalidated) to
LibreOfficeKit JNI and Java wrappers.

Change-Id: Ib70187194d002c72b64d58032aab216adc591565

1 files changed, 16 insertions, 0 deletions

diff --git a/android/Bootstrap/src/org/libreoffice/kit/Document.java b/android/Bootstrap/src/org/libreoffice/kit/Document.java
index e415d8f1605a..6985a7c206a2 100644
--- a/android/Bootstrap/src/org/libreoffice/kit/Document.java
+++ b/android/Bootstrap/src/org/libreoffice/kit/Document.java
@@ -9,6 +9,8 @@
 
 package org.libreoffice.kit;
 
+import android.util.Log;
+
 import java.nio.ByteBuffer;
 
 public class Document {
@@ -28,8 +30,22 @@ public class Document {
 
     public Document(ByteBuffer handle) {
         this.handle = handle;
+        bindMessageCallback();
+    }
+
+    /**
+     * Callback triggered through JNI to indicate that a new singal
+     * from LibreOfficeKit was retrieved.
+     */
+    private void messageRetrieved(int signalNumber, String payload) {
+        Log.i("Document", "Signal retrieved: " + signalNumber + " " + payload);
     }
 
+    /**
+     * Bind the signal callback in LOK.
+     */
+    private native void bindMessageCallback();
+
     public native void destroy();
 
     public native int getPart();