android: Repaint when the orientation changes.

Change-Id: I150b22b7b1179c1adc7995a8547c7644ac25be28

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

@@ -26,6 +26,11 @@ public class LOKitThread extends Thread {
     }
 
     private boolean draw() {
+        if (mTileProvider == null || mApplication == null) {
+            // called too early...
+            return false;
+        }
+
         RectF rect = new RectF(0, 0, mTileProvider.getPageWidth(), mTileProvider.getPageHeight());
         DisplayMetrics displayMetrics = LibreOfficeMainActivity.mAppContext.getResources().getDisplayMetrics();
         mViewportMetrics = new ImmutableViewportMetrics(displayMetrics);
@@ -114,6 +119,8 @@ public class LOKitThread extends Thread {
                 draw();
                 break;
             case LOEvent.SIZE_CHANGED:
+                // re-draw when the size has changed
+                draw();
                 break;
             case LOEvent.CHANGE_PART:
                 changePart(event.getPartIndex());
@@ -130,3 +137,5 @@ public class LOKitThread extends Thread {
         mEventQueue.clear();
     }
 }
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */

android/experimental/LOAndroid3/src/java/org/mozilla/gecko/gfx/LayerView.java

@@ -341,6 +341,14 @@ public class LayerView extends FrameLayout {
         }
     }
 
+    @Override
+    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
+        super.onLayout(changed, left, top, right, bottom);
+        if (changed) {
+            setViewportSize(new IntSize(right - left, bottom - top));
+        }
+    }
+
     private class SurfaceTextureListener implements TextureView.SurfaceTextureListener {
         public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
             // We don't do this for surfaceCreated above because it is always followed by a surfaceChanged,