[6020] traverse multi-column characters correctly

[Gavin D. Smith]

Revision: 6020
          http://svn.sv.gnu.org/viewvc/?view=rev&root=texinfo&revision=6020
Author:   gavin
Date:     2015-01-03 18:30:41 +0000 (Sat, 03 Jan 2015)
Log Message:
-----------
traverse multi-column characters correctly

Modified Paths:
--------------
    trunk/ChangeLog
    trunk/info/session.c

Modified: trunk/ChangeLog
===================================================================
--- trunk/ChangeLog     2015-01-03 18:11:40 UTC (rev 6019)
+++ trunk/ChangeLog     2015-01-03 18:30:41 UTC (rev 6020)
@@ -1,5 +1,11 @@
 2015-01-03  Gavin Smith  <address@hidden>
 
+       * info/session.c (point_forward_char, point_backward_char): 
+       Correctly traverse multi-column characters.  (Bug was likely 
+       introduced on 2014-10-09 with change to window_point_to_column.)
+
+2015-01-03  Gavin Smith  <address@hidden>
+
        * info/window.c (process_node_text, calculate_line_starts): 
        process_node_text inlined in calculate_line_starts.
 

Modified: trunk/info/session.c
===================================================================
--- trunk/info/session.c        2015-01-03 18:11:40 UTC (rev 6019)
+++ trunk/info/session.c        2015-01-03 18:30:41 UTC (rev 6020)
@@ -1080,7 +1080,10 @@
   long point = win->point;
   int col;
 
-  col = window_point_to_column (win, point, &point) + 1;
+  col = window_point_to_column (win, point, 0);
+  for (; col < win->line_map.used && win->line_map.map[col] == point; col++)
+    ;
+
   if (col < win->line_map.used)
     win->point = win->line_map.map[col];
   else
@@ -1094,7 +1097,7 @@
   long point = win->point;
   int col;
 
-  col = window_point_to_column (win, point, &point);
+  col = window_point_to_column (win, point, 0);
   for (; col >= 0 && win->line_map.map[col] == point; col--)
     ;