PDF Viewer - PageUp/Down don't move pdf by page size in FitToPage mode

pdf/instance.cc

Index: pdf/instance.cc
diff --git a/pdf/instance.cc b/pdf/instance.cc
index bb13fcc210eba34fdd4a03dde8fe5c9ff6b73ad0..ba7fca3b17aa7ad40f1b30b00b5d4cf15d8bf958 100644
--- a/pdf/instance.cc
+++ b/pdf/instance.cc
@@ -2426,6 +2426,10 @@ void Instance::UpdatePageIndicatorPosition(bool invalidate) {
 }
 
 void Instance::SetZoom(ZoomMode zoom_mode, double scale) {
+  // If same zoom level, don't do anything.

[wjmaclean, 2014/10/08 14:14:33]

You might modify this comment to indicate that, in particular, we avoid changing
the zoom_mode value if the scale is the same.

[raymes, 2014/10/08 17:23:55]

// If the zoom level doesn't change it means that this zoom change might have
been initiated by
// the plugin. In that case we don't want to change the zoom mode to ZOOM_SCALE
as it may have
// been intentionally set to ZOOM_FIT_TO_PAGE or some other value when the zoom
was last changed.

[Nikhil, 2014/10/09 06:36:19]

Done.

+  if (scale == zoom_)
+    return;
+
   double old_zoom = zoom_;
 
   zoom_mode_ = zoom_mode;