add getPartsCount() to TileProvider

Change-Id: I8f1f61110d06333bc1140caf13d9e96e669fc231

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

@@ -10,6 +10,7 @@ import org.libreoffice.kit.DirectBufferAllocator;
 import org.libreoffice.kit.Document;
 import org.libreoffice.kit.LibreOfficeKit;
 import org.libreoffice.kit.Office;
+import org.libreoffice.R;
 
 import org.mozilla.gecko.TextSelection;
 import org.mozilla.gecko.TextSelectionHandle;
@@ -19,6 +20,7 @@ import org.mozilla.gecko.gfx.GeckoLayerClient;
 import org.mozilla.gecko.gfx.IntSize;
 import org.mozilla.gecko.gfx.LayerView;
 
+
 import java.nio.ByteBuffer;
 
 /**
@@ -146,20 +148,23 @@ public class LOKitTileProvider implements TileProvider, Document.MessageCallback
         return (input / dpi) * 1440.0f;
     }
 
+    @Override
+    public int getPartsCount() {
+        return mDocument.getParts();
+    }
+
     @Override
     public void onSwipeLeft() {
-        Log.d(LOGTAG, "onSwipeLeft received");
-        if (mDocument.getDocumentType() == Document.DOCTYPE_PRESENTATION
-                && getCurrentPartNumber() < mDocument.getParts()-1) {
+        if (mDocument.getDocumentType() == Document.DOCTYPE_PRESENTATION &&
+                getCurrentPartNumber() < getPartsCount()-1) {
             LOKitShell.sendChangePartEvent(getCurrentPartNumber()+1);
         }
     }
 
     @Override
     public void onSwipeRight() {
-        Log.d(LOGTAG, "onSwipeRight received");
-        if (mDocument.getDocumentType() == Document.DOCTYPE_PRESENTATION
-                && getCurrentPartNumber() > 0) {
+        if (mDocument.getDocumentType() == Document.DOCTYPE_PRESENTATION &&
+                getCurrentPartNumber() > 0) {
             LOKitShell.sendChangePartEvent(getCurrentPartNumber()-1);
         }
     }

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

@@ -128,6 +128,11 @@ public class MockTileProvider implements TileProvider {
         return 0;
     }
 
+    @Override
+    public int getPartsCount() {
+        return 0;
+    }
+
     @Override
     public void onSwipeLeft() {
     }

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

@@ -43,6 +43,11 @@ public interface TileProvider {
      */
     int getCurrentPartNumber();
 
+    /**
+     * Get the total number of parts.
+     */
+    int getPartsCount();
+
     Bitmap thumbnail(int size);
 
     /**