I have an app where I am searching a Tk::TextUndo widget for string literals (" and ') and formatting the text if found. The problem is I have accounted for the escape character (\) and everything works fine unless there is escaped quoted text using either single or double quotes on the same line as quoted text of another quote character (if " was used in escape then ' is the problem and vise versa).

Here is the code snippet:

my @quotes = qw(" ');
foreach my $word (@quotes) {
   my ($line, @found, $char, $beg, $last, $escape);
   my $word_len = length $word;
   my $next = $start;
   while (my $from = $t->search(-regexp, "$word", $next, $end)) {
      $next = "$from + $word_len chars";
      my ($good, $trash) = split(/\./, $from);

      my $comment = $t->search( -regexp => $Comment,
        "$from linestart" => "$from lineend");

      my $comment2 = $t->search(-regexp => $Comment2,
         "$from linestart" => "$from lineend"); 
      
      @found  = split(//, $data[$good - 1]);
      $char   = 0;
      $escape = 0;
      foreach my $chars (@found) {
         $escape = 1 if ($chars eq "\\");
         $last = $good.".".($char + 1) if (($chars =~ /$word/) && ($be
+g) && ($escape != 1));
         $beg  = $good.".".$char if (($chars =~ /$word/) && (!$beg) &&
+ ($escape != 1));
         $escape = 0 if (($escape == 1) && ($chars =~ /$word/) || ($ch
+ars =~ /\w+/));

         if (($beg) && ($last)) {
            unless($comment and $t->compare($comment, '<', $beg)) {
               unless($comment2 and $t->compare($comment2, '<', $beg))
+ {
                  unhighlight_range($t, $beg, $last);
                  mark_word($t, $beg, $last, 'String');
               }
            }
            undef $beg;
            undef $last;
         }
         $char++;
      }
      undef $beg; undef $last;
   }
}
[download]

Using the above code the following examples can be seen.

Ex:

"some text" not quoted 'this is'

the above example works fine but the following has issues.

Ex:

"some \"text\"" 'this is suppose to be'

Now that example does not quote the single quoted text but the following does.

Ex:

"some \"text\"" This makes it ok 'this is suppose to be'

Any ideas from looking at the code? I know it has to do with the value of $escape and whether or not $last and $beg have a value and when they get undefined but I am having trouble pinpointing it.

Oh and yes I know I need to take into account the other quoting methods such as qw() and such but I need this worked out first.

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