W3C home > Mailing lists > Public > w3c-wai-er-ig@w3.org > June 2000

screen reader friendly output from cal command (fwd)

From: Charles McCathieNevile <charles@w3.org>
Date: Fri, 30 Jun 2000 01:11:06 -0400 (EDT)
To: WAI ER group <w3c-wai-er-ig@w3.org>
Message-ID: <Pine.LNX.4.20.0006300110380.21550-100000@tux.w3.org>
Thought this might be of nterest - calendars are one of the tricky table-type
cases.

Cheers

Charles

--
Charles McCathieNevile    mailto:charles@w3.org    phone: +61 (0) 409 134 136
W3C Web Accessibility Initiative                      http://www.w3.org/WAI
Location: I-cubed, 110 Victoria Street, Carlton VIC 3053
Postal: GPO Box 2476V, Melbourne 3001,  Australia 

---------- Forwarded message ----------
Date: Thu, 29 Jun 2000 15:45:31 -0400 (EDT)
From: A. R. Vener <salt@aero-vision.com>
Reply-To: blinux-list@redhat.com
To: blinux-list@redhat.com
Subject: screen reader friendly output from cal command
Resent-Date: 29 Jun 2000 19:45:39 -0000
Resent-From: blinux-list@redhat.com
Resent-cc: recipient list not shown: ;


Hi list,
I wrote the following perl program to provide a nice 
screen reader friendly output for the cal program.

I'm enclosing it here as is for the benefit of anyone who may want
it.

Rudy Vener
--------------------------cut here----------------------------------
#!/usr/local/bin/perl

#  bcal - screen reader friendly cal front end
#
#   Copyright  June 2000 by Rudy Vener
#  
#  This program is made available under terms identical to those of
#  the GNU Public License. Since the terms are readily available I 
#  will not repeat them here.
#
# Author: Rudy Vener
# Name:  bcal - a calendar front end formatter for the Unix cal program
# Purpose: to reformat the output of the cal program into something meaningful
# to screen reader users and to provide additional constraints to allow 
# customized reduction and formatting of the output.
#
# Modify the next line if needed, according to the location of your cal
# program.
$calcmd = "/usr/bin/cal";


@monthlist = ('january', 'february', 'march', 'april', 'may',
'june', 'july', 'august', 'september', 'october', 'november',
'december');

@ordlist = ( 'first1st','second2nd','third3rd','fourth4th','fifth5th');

@daylist = ('sunday', 'monday', 'tuesday', 'wednesday', 'thursday', 
'friday', 'saturday');

%cal = {
'sunday' => '',
'monday' => '',
'tuesday' => '',
'wednesday' => '',
'thursday' => '',
'friday' => '',
'saturday' => ''
};

# first check for help option
if ($ARGV[0] eq "-?" or $ARGV[0] eq "-help" )
{
  help_msg();
  exit;
}
# parse the arguments
parse_args(@ARGV);


  open (CAL,"$calcmd $month $year |") or die "Cannot execute the cal command\n";
  # get and hold first two lines
  $line1 = <CAL>;
  $line2 = <CAL>;
  $idx = 0;
# get the calendar dates formatted grid
  while (<CAL>)
  {
     chomp $_;
     $_ =~ s/  */ /g;
     @days = reverse(split(" ",$_)); 
    $line[$idx] = join(" ",@days);
    $idx++;
  }
  close (CAL);
  $linecount = $idx - 2;
# now reformat according to the day of the week
$idx = 0;
foreach $key (reverse(@daylist))
{
  $dtmp = "";
  foreach (@line)
  {
     @tmp = split(" ", $_); 
     $idx <= $#tmp and $dtmp = join(" ",($dtmp, $tmp[$idx]));
   } 
   $cal{$key} = $dtmp; 
   $idx++;
}

# now print it out in a way that makes sense over a screen reader
# Here is where we use any constraining arguments to limit and format
# the output

foreach $day (@daylist) 
{
   if (defined $dayname and defined $ordval) 
   {
     if (index($day, $dayname) == 0) {
       @dates = split(" ",$cal{$day});
       $ordval <= @dates or die "No $ordname $day in $monthlist[$month -1]  $year\n";
       print "$day $monthlist[$month - 1] $dates[$ordval - 1] \n";
     }
   }
   elsif (defined $dayname) 
   {
    index($day, $dayname) == 0 and   print "$day $cal{$day} \n";
   }
   else
   {
    print "$day $cal{$day} \n";
   }
}

exit;

  


sub parse_args()
{
    local ($tmp);
   
  foreach $arg (@_)
  {
    $tmp = $arg;
    $tmp =~ y/A-Z/a-z/;
    
    $tmp > 12 and $tmp <= 9999 and $year = $tmp;
    if (length($tmp) > 2)
    {
      $idx = 1;
      if (! defined $month) {
      foreach (@monthlist) {
        index($_,$tmp) == 0 and $month = $idx;
        $idx++;
        defined $month and last;
      }
      }
      if (! defined $dayname) {
      foreach (@daylist) {
        index($_,$tmp) == 0 and $dayname = $_;
        defined $dayname and last;
      }
      }
      $idx = 1;
      if (! defined $ordval) {
      foreach (@ordlist) {
        index($_,$tmp) >= 0 and $ordval = $idx and $ordname = $tmp;
        $idx++;
        defined $ordval and last;
      }
      }
    }
  }
# make up for missing arguments
  defined $year or   $getyr  = `date "+\%Y"`;
  defined $getyr and $getyr >= 1999 and $getyr <= 9999 and $year = $getyr;
  defined $month or $getmonth = `date "+\%m"`;
  defined $getmonth and $month = $getmonth * 1;
  

  defined $year or die "Invalid year \n";
  defined $month or die "Invalid month \n";
}

sub help_msg()
{
print "

Usage: bcal <arglist>

arglist may contain arguments in any order. Arguments 
may include

month - either by name january to december or value from 1 to 12. Case 
   insensitive and only first three letter of the name are required.
year  - numerical from 1 to 9999
day -- by name, limiting output to dates for that day. First three letter
   of the name are required, case insensitive.
date ordination -  from first to fifth by name or numerical abbreviation.
          E.g. first, second, 3rd, 5th, etc.

examples:
  bcal  # with no arguments returns all dates for current month and year in 
      screen reader frendly format
   bcal first thurs july  2001
    returns:  thursday july 6

    
";
}

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Received on Friday, 30 June 2000 01:11:06 GMT

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