in break_line(), fix problem where tab widths in columns are always

calculated as tabsize


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@3523 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

@@ -221,6 +221,9 @@ CVS code -
 	- Change all rcfile error messages to refer to commands instead
 	  of directives, for consistency with nanorc.5. (DLR)
 - text.c:
+  break_line()
+	- Fix problem where tab widths in columns are always calculated
+	  as tabsize. (DLR, found by Alexey Toptygin)
   do_justify()
 	- Remove redundant key checks. (DLR)
   do_spell()

src/text.c

@@ -779,14 +779,14 @@ ssize_t break_line(const char *line, ssize_t goal
 	 * found with short enough display width.  */
     ssize_t cur_loc = 0;
 	/* Current index in line. */
+    size_t cur_pos = 0;
+	/* Current column position in line. */
     int line_len;
 
     assert(line != NULL);
 
-    while (*line != '\0' && goal >= 0) {
-	size_t pos = 0;
-
-	line_len = parse_mbchar(line, NULL, &pos);
+    while (*line != '\0' && goal >= cur_pos) {
+	line_len = parse_mbchar(line, NULL, &cur_pos);
 
 	if (is_blank_mbchar(line)
 #ifndef DISABLE_HELP
@@ -801,12 +801,11 @@ ssize_t break_line(const char *line, ssize_t goal
 #endif
 	}
 
-	goal -= pos;
 	line += line_len;
 	cur_loc += line_len;
     }
 
-    if (goal >= 0)
+    if (goal >= cur_pos)
 	/* In fact, the whole line displays shorter than goal. */
 	return cur_loc;