X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;f=browse%2FParseMaster.pm;fp=browse%2FParseMaster.pm;h=0000000000000000000000000000000000000000;hb=20c9aafecfb762d8b258c410ba6c915684a8fb5b;hp=f07ba680467fc817a5c36bee24106c8d24e2225a;hpb=70d3099041b3de973b4266be0caee72b962556dd;p=jquery.git

diff --git a/browse/ParseMaster.pm b/browse/ParseMaster.pm
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-#ParseMaster (July 25 2005)
-#  Based on "ParseMaster.js" by Dean Edwards <http://dean.edwards.name/>
-#  Ported to Perl by Rob Seiler, ELR Software Pty Ltd <http://www.elr.com.au>
-#  Copyright 2005. License <http://creativecommons.org/licenses/LGPL/2.1/>
-
-package ParseMaster;
-use strict;
-use Data::Dumper;
-
-# Package wide variable declarations
-use vars qw/$VERSION
-            @_X_escaped @_X_patterns
-           /;
-
-$VERSION    = '017';
-
-# constants
-my $X_EXPRESSION  = 0;
-my $X_REPLACEMENT = 1;
-my $X_LENGTH      = 2;
-
-# re's used to determine nesting levels
-my $X_GROUPS      = qr/\(/o;                # NB: Requires g modifier!
-my $X_SUB_REPLACE = qr/\$\d/o;
-my $X_INDEXED     = qr/^\$\d+$/o;
-my $XX_ESCAPE     = qr/\\./o;               # NB: Requires g modifier!
-my $XX_DELETED    = qr/\001[^\001]*\001/o;  # NB: Requires g modifier!
-my $DIGIT         = qr/[^\D]/o;             # Yep - this is a digit - contains no non-digits
-
-# Constructor
-sub new {
-  my $class = shift;
-  my $self  = {};
-  @_X_escaped  = ();  # Re-initialize global for each instance
-  @_X_patterns = ();  # Re-initialize global for each instance
-  # Instance variables - access by similarly named set/get functions
-  $self->{_ignoreCase_} = 0;
-  $self->{_escapeChar_} = '';
-  bless ($self, $class);
-  return $self;
-}
-
-sub ignoreCase {
-  my ($self, $value) = @_;
-  if (defined($value)) {
-    $self->{_ignoreCase_} = $value;
-  }
-  return $self->{_ignoreCase_};
-}
-
-sub escapeChar{
-  my ($self, $value) = @_;
-  if (defined($value)) {
-    $self->{_escapeChar_} = $value;
-  }
-  return $self->{_escapeChar_};
-}
-
-#######################
-# Public Parsemaster functions
-
-my $X_DELETE = sub(@$) {
-  my $X_offset = pop;
-  my @X_match = @_;
-  return (chr(001) . $X_match[$X_offset] . chr(001));
-}; # NB semicolon required for closure!
-
-# create and add a new pattern to the patterns collection
-sub add {
-  my ($self, $expression, $X_replacement) = @_;
-  if (!$X_replacement) {$X_replacement = $X_DELETE};
-
-  # count the number of sub-expressions
-  my $temp = &_X_internalEscape($expression);
-  my $length  = 1; # Always at least one because each pattern is itself a sub-expression
-     $length += $temp =~ s/$X_GROUPS//g; # One way to count the left capturing parentheses in the regexp string
-
-  # does the pattern deal with sub-expressions?
-  if ((ref($X_replacement) ne "CODE") && ($X_replacement =~ m/$X_SUB_REPLACE/)) {
-    if ($X_replacement =~ m/$X_INDEXED/) { # a simple lookup? (eg "$2")
-      # store the index (used for fast retrieval of matched strings)
-      $X_replacement = substr($X_replacement,1) - 1;
-    }
-    else { # a complicated lookup (eg "Hello $2 $1")
-      my $i = $length;
-      while ($i) { # Had difficulty getting Perl to do Dean's splitting and joining of strings containing $'s
-        my $str = '$a[$o+' . ($i-1) . ']'; # eg $a[$o+1]
-        $X_replacement =~ s/\$$i/$str/;      # eg $2 $3 -> $a[$o+1] $a[$o+2]
-        $i--;
-      }
-      # build a function to do the lookup - returns interpolated string of array lookups
-      $X_replacement = eval('sub {my $o=pop; my @a=@_; return "' . $X_replacement . '"};');
-    }
-  }
-  else {}
-  # pass the modified arguments
-  &_X_add($expression || q/^$/, $X_replacement, $length);
-}
-
-# execute the global replacement
-sub exec {
-#print Dumper(@_X_patterns);
-  my ($self, $X_string) = @_;
-  my $escChar    = $self->escapeChar();
-  my $ignoreCase = $self->ignoreCase();
-  my ($regexp,$captures) = &_getPatterns();  # Concatenated and parenthesized regexp eg '(regex1)|(regex2)|(regex3)' etc
-  $X_string = &_X_escape($X_string, $escChar);
-  if ($ignoreCase) {$X_string =~ s/$regexp/{&_X_replacement(&_matchVars($captures,\$X_string))}/gie} # Pass $X_String as a
-    else           {$X_string =~ s/$regexp/{&_X_replacement(&_matchVars($captures,\$X_string))}/ge}  # reference for speed
-
-  $X_string = &_X_unescape($X_string, $escChar);
-  $X_string =~ s/$XX_DELETED//g;
-  return $X_string;
-}
-
-sub _X_add {
-  push (@_X_patterns, [@_]); # Save each argument set as is into an array of arrays
-}
-
-# this is the global replace function (it's quite complicated)
-sub _X_replacement {
-  my (@arguments) = @_;
-#print Dumper (@arguments);
-  if ($arguments[0] le '') {return ''}
-  # Dereference last index (source String) here - faster than in _matchVars (maybe not needed at all?)
-  $arguments[$#arguments] = ${$arguments[$#arguments]};
-  my $i = 1;
-  # loop through the patterns
-  for (my $j=0; $j<scalar(@_X_patterns); $j++) { # Loop through global all @_X_patterns
-    my @X_pattern = @{$_X_patterns[$j]};
-    # do we have a result? NB: "if ($arguments[$i])" as in Dean's Javascript is false for the value 0!!!
-    if ((defined $arguments[$i]) && ($arguments[$i] gt '')) {
-      my $X_replacement = $X_pattern[$X_REPLACEMENT];
-      # switch on type of $replacement
-      if (ref($X_replacement) eq "CODE") {     # function
-        return &$X_replacement(@arguments,$i);
-      }
-      elsif ($X_replacement =~ m/$DIGIT/) {    # number (contains no non-digits)
-        return $arguments[$X_replacement + $i];
-      }
-      else { # default
-        return $X_replacement;                 # default
-      }
-    } # skip over references to sub-expressions
-    else {$i += $X_pattern[$X_LENGTH]}
-  }
-}
-
-#######################
-# Private functions
-#######################
-
-# encode escaped characters
-sub _X_escape {
-  my ($X_string, $X_escapeChar) = @_;
-  if ($X_escapeChar) {
-    my $re = '\\'.$X_escapeChar.'(.)';
-    $X_string =~ s/$re/{push(@_X_escaped,$1); $X_escapeChar}/ge;
-  }
-  return $X_string;
-}
-
-# decode escaped characters
-sub _X_unescape {
-  my ($X_string, $X_escapeChar) = @_;
-  if ($X_escapeChar) { # We'll only do this if there is an $X_escapeChar!
-    my $re = '\\'.$X_escapeChar;
-    $X_string =~ s/$re/{$X_escapeChar . (shift(@_X_escaped))}/ge; # Don't use Dean Edwards as below 'or' here - because zero will return ''!
-  # $X_string =~ s/$re/{$X_escapeChar . (shift(@_X_escaped) || '')}/ge;
-  }
-  return $X_string;
-}
-
-sub _X_internalEscape {
-  my ($string) = shift;
-  $string =~ s/$XX_ESCAPE//g;
-  return $string;
-}
-
-# Builds an array of match variables to (approximately) emulate that available in Javascript String.replace()
-sub _matchVars {
-  my ($m,$sref) = @_;
-  my @args = (1..$m);                # establish the number potential memory variables
-  my @mv = map {eval("\$$_")} @args; # matchvarv[1..m] = the memory variables $1 .. $m
-  unshift (@mv, $&);                 # matchvar[0]     = the substring that matched
-  push    (@mv, length($`));         # matchvar[m+1]   =  offset within the source string where the match occurred (= length of prematch string)
-  push    (@mv, $sref);              # matchvar[m+2]   = reference to full source string (dereference in caller if/when needed)
-#print Dumper (@mv);
-  return @mv;
-}
-
-sub _getPatterns {
-  my @Patterns = ();
-  my $lcp = 0;
-  for (my $i=0; $i<scalar(@_X_patterns); $i++) {       # Loop through global all @_patterns
-    push (@Patterns, $_X_patterns[$i][$X_EXPRESSION]); # accumulate the expressions
-    $lcp += $_X_patterns[$i][$X_LENGTH];               # sum the left capturing parenthesis counts
-  }
-  my $str = "(" . join(')|(',@Patterns). ")";          # enclose each pattern in () separated by "|"
-  return ($str, $lcp);
-}
-
-##################
-# END            #
-##################
-1; # ParseMaster #
-##################