From 19839b479acd5637a08cb00ea6146bdb7fc8128b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Caol=C3=A1n=20McNamara?= <caolanm@redhat.com>
Date: Tue, 2 Dec 2014 17:42:55 +0000
Subject: [PATCH] Only call super-expensive Invalidate on scrollbar toggling

otherwise even using backspace in an annotated area will cause super slow
behaviour as each keystroke causes a full page render

This became a problem after

commit 0761f81643a6890457e9ef7d913ab5c88c2593a4
Date:   Thu Dec 19 18:50:58 2013 +0000
    123792: complete annotations on text ranges feature

but underlying problem was always there ready to trigger.

For this case only render the full page if the state
of comments scrollbars *toggles*, i.e. if there wasn't
scrollbars and there ends up still with no scrollbars
avoid the (bad) hack of invalidating the page

(cherry picked from commit 378c74ce290ab772f962db51ff8cba200cb40144)

Conflicts:
	sw/source/uibase/docvw/PostItMgr.cxx

Change-Id: Ic7fd432d2317b0f5ad8d8773636f99fe75d660d6
(cherry picked from commit 7e75eab406c5e58e40987ab8a249dbacbb685551)
---
 sw/source/core/uibase/docvw/PostItMgr.cxx | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sw/source/core/uibase/docvw/PostItMgr.cxx b/sw/source/core/uibase/docvw/PostItMgr.cxx
index d51ebff..b36e86f 100644
--- a/sw/source/core/uibase/docvw/PostItMgr.cxx
+++ b/sw/source/core/uibase/docvw/PostItMgr.cxx
@@ -764,7 +764,8 @@ void SwPostItMgr::LayoutPostIts()
                 }
                 else
                 {
-                    bUpdate = true;
+                    if (mPages[n]->bScrollbar)
+                        bUpdate = true;
                     mPages[n]->bScrollbar = false;
                 }
             }
@@ -796,7 +797,6 @@ void SwPostItMgr::LayoutPostIts()
                 if ( bRepair )
                     CheckForRemovedPostIts();
             }
-
             // notes scrollbar is otherwise not drawn correctly for some cases
             // scrollbar area is enough
             if (bUpdate)
-- 
1.9.3