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Text File  |  1992-08-05  |  3KB  |  111 lines
  1. ;#
  2. ;#      @(#)complete.pl,v1.1            (me@anywhere.EBay.Sun.COM) 09/23/91
  3. ;#
  4. ;# Author: Wayne Thompson
  5. ;#
  6. ;# Description:
  7. ;#     This routine provides word completion.
  8. ;#     (TAB) attempts word completion.
  9. ;#     (^D)  prints completion list.
  10. ;#      (These may be changed by setting $Complete'complete, etc.)
  11. ;#
  12. ;# Diagnostics:
  13. ;#     Bell when word completion fails.
  14. ;#
  15. ;# Dependencies:
  16. ;#     The tty driver is put into raw mode.
  17. ;#
  18. ;# Bugs:
  19. ;#
  20. ;# Usage:
  21. ;#     $input = &Complete('prompt_string', *completion_list);
  22. ;#         or
  23. ;#     $input = &Complete('prompt_string', @completion_list);
  24. ;#
  25.  
  26. CONFIG: {
  27.     package Complete;
  28.  
  29.     $complete = "\004";
  30.     $kill     = "\025";
  31.     $erase1 =   "\177";
  32.     $erase2 =   "\010";
  33. }
  34.  
  35. sub Complete {
  36.     package Complete;
  37.  
  38.     local($[) = 0;
  39.     if ($_[1] =~ /^StB\0/) {
  40.         ($prompt, *_) = @_;
  41.     }
  42.     else {
  43.         $prompt = shift(@_);
  44.     }
  45.     @cmp_lst = sort(@_);
  46.  
  47.     system('stty raw -echo');
  48.     LOOP: {
  49.         print($prompt, $return);
  50.         while (($_ = getc(STDIN)) ne "\r") {
  51.             CASE: {
  52.                 # (TAB) attempt completion
  53.                 $_ eq "\t" && do {
  54.                     @match = grep(/^$return/, @cmp_lst);
  55.                     $l = length($test = shift(@match));
  56.                     unless ($#match < 0) {
  57.                         foreach $cmp (@match) {
  58.                             until (substr($cmp, 0, $l) eq substr($test, 0, $l)) {
  59.                                 $l--;
  60.                             }
  61.                         }
  62.                         print("\a");
  63.                     }
  64.                     print($test = substr($test, $r, $l - $r));
  65.                     $r = length($return .= $test);
  66.                     last CASE;
  67.                 };
  68.  
  69.                 # (^D) completion list
  70.                 $_ eq $complete && do {
  71.                     print(join("\r\n", '', grep(/^$return/, @cmp_lst)), "\r\n");
  72.                     redo LOOP;
  73.                 };
  74.  
  75.                 # (^U) kill
  76.                 $_ eq $kill && do {
  77.                     if ($r) {
  78.                         undef($r, $return);
  79.                         print("\r\n");
  80.                         redo LOOP;
  81.                     }
  82.                     last CASE;
  83.                 };
  84.  
  85.                 # (DEL) || (BS) erase
  86.                 ($_ eq $erase1 || $_ eq $erase2) && do {
  87.                     if($r) {
  88.                         print("\b \b");
  89.                         chop($return);
  90.                         $r--;
  91.                     }
  92.                     last CASE;
  93.                 };
  94.  
  95.                 # printable char
  96.                 ord >= 32 && do {
  97.                     $return .= $_;
  98.                     $r++;
  99.                     print;
  100.                     last CASE;
  101.                 };
  102.             }
  103.         }
  104.     }
  105.     system('stty -raw echo');
  106.     print("\n");
  107.     $return;
  108. }
  109.  
  110. 1;
  111.