From: John Darrington <john@darrington.wattle.id.au>
Date: Wed, 27 Oct 2010 11:13:19 +0000 (+0200)
Subject: Make ascii driver's length and width parameters fit the terminal.
X-Git-Tag: v0.7.7~169
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a77c12af47a9ed94b5c38d4a762bb287bfadda93;p=pspp-builds.git

Make ascii driver's length and width parameters fit the terminal.

If the driver's output is a tty, then handle SIGWINCH to adjust
the length and width according to the size of the terminal.
---

diff --git a/src/output/ascii.c b/src/output/ascii.c
index c9f96b21..8b48d9bd 100644
--- a/src/output/ascii.c
+++ b/src/output/ascii.c
@@ -21,6 +21,8 @@
 #include <limits.h>
 #include <stdint.h>
 #include <stdlib.h>
+#include <signal.h>
+#include <unistd.h>
 
 #include "data/file-name.h"
 #include "data/settings.h"
@@ -786,6 +788,14 @@ ascii_layout_cell (struct ascii_driver *a, const struct table_cell *cell,
 
 /* ascii_close_page () and support routines. */
 
+static struct ascii_driver *the_driver;
+
+static void
+winch_handler (int signum UNUSED)
+{
+  update_page_size (the_driver, false);
+}
+
 static bool
 ascii_open_page (struct ascii_driver *a)
 {
@@ -799,6 +809,18 @@ ascii_open_page (struct ascii_driver *a)
       a->file = fn_open (a->file_name, a->append ? "a" : "w");
       if (a->file != NULL)
         {
+	  if ( isatty (fileno (a->file)))
+	    {
+	      struct sigaction action;
+	      sigemptyset (&action.sa_mask);
+	      action.sa_flags = 0;
+	      action.sa_handler = winch_handler;
+	      the_driver = a;
+	      a->auto_width = true;
+	      a->auto_length = true;
+	      sigaction (SIGWINCH, &action, NULL);
+	    }
+
           if (a->init != NULL)
             fputs (a->init, a->file);
         }