Simplification

app/src/main/java/eu/faircode/email/WebViewEx.java

@@ -298,7 +298,7 @@ public class WebViewEx extends WebView implements DownloadListener, View.OnLongC
 
     private float lastX;
     private float lastY;
-    private Integer lastXoff;
+    private int lastXoff;
 
     @Override
     public boolean onTouchEvent(MotionEvent event) {
@@ -316,24 +316,18 @@ public class WebViewEx extends WebView implements DownloadListener, View.OnLongC
                 intercept = (yoff > 0 || dy >= 0) && (yoff < bottom || dy <= 0);
             }
 
-            if (intercept)
-                lastXoff = computeHorizontalScrollOffset();
-            else {
-                int xrange = computeHorizontalScrollRange();
-                int xextend = computeHorizontalScrollExtent();
-                boolean canScrollHorizontal = (xrange > xextend);
-                //Log.i("MMM xrange=" + xrange + " xextend=" + xextend + " can=" + canScrollHorizontal);
-                if (canScrollHorizontal) {
-                    int right = xrange - xextend;
-                    int xoff = computeHorizontalScrollOffset();
-                    if (lastXoff == null)
-                        lastXoff = xoff;
-                    float dx = lastX - event.getX();
-                    intercept = (xoff > 0 || dx >= 0) &&
-                            (xoff < right || dx <= 0) &&
-                            (Math.signum(dx) == Math.signum(xoff - lastXoff));
-                    lastXoff = xoff;
-                }
+            int xrange = computeHorizontalScrollRange();
+            int xextend = computeHorizontalScrollExtent();
+            boolean canScrollHorizontal = (xrange > xextend);
+            if (canScrollHorizontal) {
+                int right = xrange - xextend;
+                int xoff = computeHorizontalScrollOffset();
+                int ldx = xoff - lastXoff;
+                float dx = lastX - event.getX();
+                intercept = (xoff > 0 || dx >= 0) &&
+                        (xoff < right || dx <= 0) &&
+                        (Math.signum(dx) == Math.signum(ldx));
+                lastXoff = xoff;
             }
         }
         getParent().requestDisallowInterceptTouchEvent(intercept || event.getPointerCount() > 1);