From 5a4acc25a2d40a2e6243a4424e4fb8ae2d26671c Mon Sep 17 00:00:00 2001
From: Karsten Hopp <karsten@fedoraproject.org>
Date: Aug 13 2007 11:48:00 +0000
Subject: patchlevel 45


---

diff --git a/7.1.045 b/7.1.045
new file mode 100644
index 0000000..32307d2
--- /dev/null
+++ b/7.1.045
@@ -0,0 +1,101 @@
+To: vim-dev@vim.org
+Subject: patch 7.1.045
+Fcc: outbox
+From: Bram Moolenaar <Bram@moolenaar.net>
+Mime-Version: 1.0
+Content-Type: text/plain; charset=ISO-8859-1
+Content-Transfer-Encoding: 8bit
+------------
+
+Patch 7.1.045
+Problem:    Unnecessary screen redrawing. (Jjgod Jiang)
+Solution:   Reset "must_redraw" after clearing the screen.
+Files:	    src/screen.c
+
+
+*** ../vim-7.1.044/src/screen.c	Thu Jul 26 22:55:11 2007
+--- src/screen.c	Mon Jul 30 21:39:32 2007
+***************
+*** 331,336 ****
+--- 331,341 ----
+      {
+  	if (type < must_redraw)	    /* use maximal type */
+  	    type = must_redraw;
++ 
++ 	/* must_redraw is reset here, so that when we run into some weird
++ 	 * reason to redraw while busy redrawing (e.g., asynchronous
++ 	 * scrolling), or update_topline() in win_update() will cause a
++ 	 * scroll, the screen will be redrawn later or in win_update(). */
+  	must_redraw = 0;
+      }
+  
+***************
+*** 1019,1024 ****
+--- 1024,1036 ----
+  	    type = VALID;
+      }
+  
++     /* Trick: we want to avoid clearning the screen twice.  screenclear() will
++      * set "screen_cleared" to TRUE.  The special value MAYBE (which is still
++      * non-zero and thus not FALSE) will indicate that screenclear() was not
++      * called. */
++     if (screen_cleared)
++ 	screen_cleared = MAYBE;
++ 
+      /*
+       * If there are no changes on the screen that require a complete redraw,
+       * handle three cases:
+***************
+*** 1220,1226 ****
+  	    mid_end = wp->w_height;
+  	    if (lastwin == firstwin)
+  	    {
+! 		screenclear();
+  #ifdef FEAT_WINDOWS
+  		/* The screen was cleared, redraw the tab pages line. */
+  		if (redraw_tabline)
+--- 1232,1242 ----
+  	    mid_end = wp->w_height;
+  	    if (lastwin == firstwin)
+  	    {
+! 		/* Clear the screen when it was not done by win_del_lines() or
+! 		 * win_ins_lines() above, "screen_cleared" is FALSE or MAYBE
+! 		 * then. */
+! 		if (screen_cleared != TRUE)
+! 		    screenclear();
+  #ifdef FEAT_WINDOWS
+  		/* The screen was cleared, redraw the tab pages line. */
+  		if (redraw_tabline)
+***************
+*** 1228,1233 ****
+--- 1244,1256 ----
+  #endif
+  	    }
+  	}
++ 
++ 	/* When win_del_lines() or win_ins_lines() caused the screen to be
++ 	 * cleared (only happens for the first window) or when screenclear()
++ 	 * was called directly above, "must_redraw" will have been set to
++ 	 * NOT_VALID, need to reset it here to avoid redrawing twice. */
++ 	if (screen_cleared == TRUE)
++ 	    must_redraw = 0;
+      }
+      else
+      {
+*** ../vim-7.1.044/src/version.c	Sun Jul 29 15:02:34 2007
+--- src/version.c	Mon Jul 30 21:58:06 2007
+***************
+*** 668,669 ****
+--- 668,671 ----
+  {   /* Add new patch number below this line */
++ /**/
++     45,
+  /**/
+
+-- 
+Be thankful to be in a traffic jam, because it means you own a car.
+
+ /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net   \\\
+///        sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
+\\\        download, build and distribute -- http://www.A-A-P.org        ///
+ \\\            help me help AIDS victims -- http://ICCF-Holland.org    ///