commit bash-20160311 snapshot

CWRU/CWRU.chlog

@@ -10552,3 +10552,16 @@ examples/loadables/Makefile.in
 	  install-supported target to create it first.  Bug with parallel
 	  install (`make -j 4 install') reported by Chris Staub
 	  <cstaub67@gmail.com>
+
+				   3/12
+				   ----
+lib/readline/display.c:
+	- rl_clear_visible_line: clear all screen lines occupied by the current
+	  visible readline line.  Inspired by report from Lauri Ranta
+	  <lauri.ranta@gmail.com>
+
+lib/readline/readline.h
+	- rl_clear_visible_line: extern declaration
+
+lib/readline/doc/rltech.texi
+	- rl_clear_visible_line: add documentation

bashline.c

@@ -4080,8 +4080,12 @@ bash_execute_unix_command (count, key)
   ce = rl_get_termcap ("ce");
   if (ce)	/* clear current line */
     {
+#if 0
       fprintf (rl_outstream, "\r");
       tputs (ce, 1, putx);
+#else
+      rl_clear_visible_line ();
+#endif
       fflush (rl_outstream);
     }
   else

lib/readline/display.c

@@ -2027,6 +2027,34 @@ rl_on_new_line ()
   return 0;
 }
 
+/* Clear all screen lines occupied by the current readline line buffer
+   (visible line) */
+int
+rl_clear_visible_line ()
+{
+  int curr_line;
+
+  /* Make sure we move to column 0 so we clear the entire line */
+#if defined (__MSDOS__)
+  putc ('\r', rl_outstream);
+#else
+  tputs (_rl_term_cr, 1, _rl_output_character_function);
+#endif
+  _rl_last_c_pos = 0;
+
+  /* Move to the last screen line of the current visible line */
+  _rl_move_vert (_rl_vis_botlin);
+
+  /* And erase screen lines going up to line 0 (first visible line) */
+  for (curr_line = _rl_last_v_pos; curr_line >= 0; curr_line--)
+    {
+      _rl_move_vert (curr_line);
+      _rl_clear_to_eol (0);
+    }
+
+  return 0;
+}
+
 /* Tell the update routines that we have moved onto a new line with the
    prompt already displayed.  Code originally from the version of readline
    distributed with CLISP.  rl_expand_prompt must have already been called

lib/readline/doc/rltech.texi

@@ -963,6 +963,10 @@ redisplay.
 It should be used after setting @var{rl_already_prompted}.
 @end deftypefun
 
+@deftypefun int rl_clear_visible_line (void)
+Clear the screen lines corresponding to the current line's contents.
+@end deftypefun
+
 @deftypefun int rl_reset_line_state (void)
 Reset the display state to a clean state and redisplay the current line
 starting on a new line.

lib/readline/doc/version.texi

@@ -4,7 +4,7 @@ Copyright (C) 1988-2016 Free Software Foundation, Inc.
 
 @set EDITION 7.0
 @set VERSION 7.0
-@set UPDATED 28 February 2016
-@set UPDATED-MONTH February 2016
+@set UPDATED 12 March 2016
+@set UPDATED-MONTH March 2016
 
-@set LASTCHANGE Sun Feb 28 15:31:16 EST 2016
+@set LASTCHANGE Sat Mar 12 15:45:03 EST 2016

lib/readline/readline.h

@@ -379,6 +379,7 @@ extern void rl_redisplay PARAMS((void));
 extern int rl_on_new_line PARAMS((void));
 extern int rl_on_new_line_with_prompt PARAMS((void));
 extern int rl_forced_update_display PARAMS((void));
+extern int rl_clear_visible_line PARAMS((void));
 extern int rl_clear_message PARAMS((void));
 extern int rl_reset_line_state PARAMS((void));
 extern int rl_crlf PARAMS((void));