--- loncom/xml/style.pm 2000/10/26 14:01:40 1.6
+++ loncom/xml/style.pm 2008/11/24 18:55:01 1.22
@@ -1,171 +1,194 @@
# The LearningOnline Network with CAPA
-# Style Parser Module
+# Style Parser Module (new version)
+#
+# $Id: style.pm,v 1.22 2008/11/24 18:55:01 jms Exp $
+#
+# Copyright Michigan State University Board of Trustees
+#
+# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
+#
+# LON-CAPA is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# LON-CAPA is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with LON-CAPA; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+#
+# /home/httpd/html/adm/gpl.txt
+#
+# http://www.lon-capa.org/
+#
+# Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
+# TtHfunc and TtMfunc (the "Code") may be compiled and linked into
+# binary executable programs or libraries distributed by the
+# Michigan State University (the "Licensee"), but any binaries so
+# distributed are hereby licensed only for use in the context
+# of a program or computational system for which the Licensee is the
+# primary author or distributor, and which performs substantial
+# additional tasks beyond the translation of (La)TeX into HTML.
+# The C source of the Code may not be distributed by the Licensee
+# to any other parties under any circumstances.
+#
+# written 01/08/01 by Alexander Sakharuk
#
-# last modified 06/29/00 by Alexander Sakharuk
-package Apache::style;
+package Apache::style;
use strict;
use HTML::TokeParser;
sub styleparser {
- my ($target,$content_style_string) = @_;
- my @target_list = ('target','web','tex','edit','modified','rat','answer','metadis');
- my @value_style = ();
- my $current_key = '';
- my $current_value = '';
- my $stoken;
- my $flag;
- my $iele;
- my $flag_target;
-
- my $pstyle = HTML::TokeParser->new(\$content_style_string);
-
- while ($stoken = $pstyle->get_token) {
-# start for tag definition
- if ($stoken->[0] eq 'S' and $stoken->[1] eq 'definetag') {
-# new key in hash
- $current_key = $stoken->[2]{name};
- $flag = 0;
-# metadata output
- if ($target eq 'meta') {
- while ($stoken = $pstyle->get_token and $stoken->[1] ne 'definetag') {
- if ($stoken->[0] eq 'S' and $stoken->[1] eq 'meta') {
- while ($stoken = $pstyle->get_token and $stoken->[1] ne 'meta') {
- if ($stoken->[0] eq 'T') {
- $current_value .= $stoken->[1];
- } elsif ($stoken->[0] eq 'S') {
- $current_value .= $stoken->[4];
- } else {
- $current_value .= $stoken->[2];
- }
- }
+ my ($target,$content_style_string)=@_;
+ my @keys = ();
+ my @values = ();
+ my $current_value;
+ my $allow=0;
+ my $pstyle = HTML::TokeParser->new(\$content_style_string);
+ $pstyle->xml_mode('1');
+ while (my $stoken = $pstyle->get_token) {
+ if (($stoken->[0] eq 'S') && ($stoken->[1] eq 'definetag')) {
+ push @keys,$stoken->[2]->{'name'};
+ $current_value='';
+ $allow=0;
+ } elsif (($stoken->[0] eq 'E') && ($stoken->[1] eq 'definetag')) {
+ $current_value =~ s/(\s)+/$1/g;
+ $current_value =~ s/\n//g;
+ push(@values,$current_value);
+ } elsif (($target eq 'meta') && ($stoken->[0] eq 'S') && ($stoken->[1] eq 'meta')) {
+ $allow=1;
+ } elsif (($target eq 'meta') && ($stoken->[0] eq 'E') && ($stoken->[1] eq 'meta')) {
+ $allow=0;
+ } elsif (($target ne 'meta') && ($stoken->[0] eq 'S') && ($stoken->[1] eq 'render')) {
+ $allow=1;
+ } elsif (($target ne 'meta') && ($stoken->[0] eq 'E') && ($stoken->[1] eq 'render')) {
+ $allow=0;
+ } elsif (($target ne 'meta') && ($target ne 'web') && ($stoken->[0] eq 'S') && ($stoken->[1] eq 'web')) {
+ $allow=0;
+ } elsif (($target ne 'meta') && ($target ne 'web') && ($stoken->[0] eq 'E') && ($stoken->[1] eq 'web')) {
+ $allow=1;
+ } elsif (($target ne 'meta') && ($target ne 'tex') && ($stoken->[0] eq 'S') && ($stoken->[1] eq 'tex')) {
+ $allow=0;
+ } elsif (($target ne 'meta') && ($target ne 'tex') && ($stoken->[0] eq 'E') && ($stoken->[1] eq 'tex')) {
+ $allow=1;
+ } elsif (($stoken->[0] eq 'S') && ($stoken->[1] eq 'target') && (not $stoken->[2]->{'name'}=~/(^\s*$target\s*,|,\s*$target\s*,|,\s*$target\s*$|^\s*$target\s*$)/)) {
+ $allow=0;
+ } elsif (($stoken->[0] eq 'E') && ($stoken->[1] eq 'target')) {
+ $allow=1;
+ } elsif (($target ne 'meta') && ($stoken->[0] eq 'S') && ($stoken->[1] eq $target)) {
+ $allow=1;
+ } elsif (($target ne 'meta') && ($stoken->[0] eq 'E') && ($stoken->[1] eq $target)) {
+ } elsif (($stoken->[0] eq 'S') && ($stoken->[1] eq 'target') && ($stoken->[2]->{'name'}=~/(^\s*$target\s*,|,\s*$target\s*,|,\s*$target\s*$|^\s*$target\s*$)/)) {
+ $allow=1;
+ } elsif ($allow) {
+ if ($stoken->[0] eq 'T') {
+ $current_value .= $stoken->[1];
+ } elsif ($stoken->[0] eq 'S') {
+ my $number=-1;
+ if ($stoken->[1] ne $keys[-1]) {
+ $number = &testkey($stoken->[0],$stoken->[1],@keys);
+ }
+ if ($number != -1) {
+ $current_value .= &testvalue($number,$stoken->[0],$stoken->[2],@values);
+ } else {
+ $current_value .= $stoken->[4];
+ }
+ } elsif ($stoken->[0] eq 'E') {
+ my $number=-1;
+ if (('/'.$stoken->[1]) ne $keys[-1]) {
+ $number = &testkey($stoken->[0],$stoken->[1],@keys);
+ }
+ if ($number != -1) {
+ $current_value .= &testvalue($number,$stoken->[0],$stoken->[2],@values);
+ } else {
+ $current_value .= $stoken->[2];
+ }
}
- }
- } else {
-# render output
- while ($stoken = $pstyle->get_token and $stoken->[1] ne 'render') {
- if ($stoken->[1] eq 'definetag') {
- $flag = 1;
- last;
- }
- }
- if ($flag == 0) {
- while ($stoken = $pstyle->get_token and $stoken->[1] ne 'definetag'
- and $stoken->[1] ne 'render') {
-# if token not equal to target $flag_target=0
- $flag_target = 0;
- for (my $i=0; $i<$#target_list; $i++) {
- if ($stoken->[1] eq $target_list[$i]) {
- $flag_target = 1;
- }
- }
- if ($flag_target == 0) {
-# target not found
- my $tempo_out = &test($stoken->[0],$stoken->[1],$stoken->[2],$stoken->[4],@value_style);
- $current_value .= $tempo_out;
- } else {
-# target found
- if ($stoken->[0] eq 'S' and $stoken->[1] eq 'target') {
-# target defined via <target> tag
- if (defined $stoken->[2]{dest}) {
- if (index($stoken->[2]{dest},$target) == -1) {
- while ($stoken = $pstyle->get_token and $stoken->[1] ne 'target') {
- }
- } elsif (index($stoken->[2]{dest},$target) != -1) {
- while ($stoken = $pstyle->get_token and $stoken->[1] ne 'target') {
- my $tempo_out = &test($stoken->[0],$stoken->[1],$stoken->[2],$stoken->[4],@value_style);
- $current_value .= $tempo_out;
- }
- }
- } else {
- if (index($stoken->[2]{excl},$target) != -1) {
- while ($stoken = $pstyle->get_token and $stoken->[1] ne 'target') {
- }
- } elsif (index($stoken->[2]{excl},$target) == -1) {
- while ($stoken = $pstyle->get_token and $stoken->[1] ne 'target') {
- my $tempo_out = &test($stoken->[0],$stoken->[1],$stoken->[2],$stoken->[4],@value_style);
- $current_value .= $tempo_out;
- }
- }
-
-
- }
- } elsif ($stoken->[1] ne $target) {
-#target defined via short-form tag
- my $tempo_token = $stoken->[1];
- while ($stoken = $pstyle->get_token and $stoken->[1] ne $tempo_token) {
- }
- } else {
- my $tempo_token = $stoken->[1];
- while ($stoken = $pstyle->get_token and $stoken->[1] ne $tempo_token) {
- my $tempo_out = &test($stoken->[0],$stoken->[1],$stoken->[2],$stoken->[4],@value_style);
- $current_value .= $tempo_out;
- }
- }
- }
}
-
- }
- }
- }
- $current_value =~ s/(\s)+/$1/g;
- if ($current_value ne '' ) {
- push (@value_style,lc $current_key,$current_value);
- }
- $current_key = '';
- $current_value = '';
- }
- my %style_for_target = @value_style;
-# check printing
-# while (($current_key,$current_value) = each %style_for_target) {
-# print "$current_key => $current_value\n";
-# }
-# return result
- return %style_for_target;
+ }
+ my %style_for_target;
+ for (my $i=0; $i<=$#keys; $i++) {
+ if ($values[$i] !~ /^\s*$/) {
+ $style_for_target{$keys[$i]}=$values[$i];
+ }
+ }
+ return %style_for_target;
}
-sub test {
- my ($zeroth,$first,$second,$fourth,@value_style) = @_;
- my $current_value = '';
- my $num;
- my $flag;
-
- if ($zeroth eq 'T') {
- $current_value .= $first;
- } elsif ($zeroth eq 'S') {
- $flag = 0;
- for (my $i=$#value_style-1;$i>=0;$i=$i-2) {
- if ($first eq $value_style[$i]) {
- $flag = 1;
- $num = $i + 1;
- last;
- }
- }
- if ($flag == 0) {
- $current_value .= $fourth;
- } else {
- $current_value .= $value_style[$num];
+sub testkey {
+
+ my ($zeroth,$first,@keys) = @_;
+ my $number = -1;
+ if ($zeroth eq 'S') {
+ for (my $i=$#keys; $i>=0; $i=$i-1) {
+ if ($first eq lc($keys[$i])) {
+ $number = $i;
+ last;
}
- } elsif ($zeroth eq 'E') {
- $flag = 0;
- for (my $i=$#value_style-1;$i>=0;$i=$i-2) {
- if ($first eq $value_style[$i]) {
- $flag = 1;
- $num = $i + 1;
- last;
- }
+ }
+ } elsif ($zeroth eq 'E') {
+ for (my $i=$#keys; $i>=0; $i=$i-1) {
+ if ('/'.$first eq lc($keys[$i])) {
+ $number = $i;
+ last;
}
- if ($flag == 0) {
- $current_value .= $second;
- } else {
- $current_value .= $value_style[$num];
- }
- }
- return $current_value;
+ }
+ }
+ return $number;
+}
+
+sub testvalue {
+
+ my ($number,$zeroth,$second,@values) = @_;
+ my $current_content = $values[$number];
+ if ($zeroth eq 'S') {
+ my %tempo_hash = %$second;
+ while ((my $current_k,my $current_v) = each %tempo_hash) {
+ $current_content =~ s/\$$current_k/$current_v/g;
+ }
+ } elsif ($zeroth eq 'E') {
+ $current_content = $values[$number];
+ }
+ return $current_content;
}
1;
+
__END__
+
+=pod
+
+=head1 NAME
+
+Apache::style.pm
+
+=head1 SYNOPSIS
+
+Style parsing module
+
+This is part of the LearningOnline Network with CAPA project
+described at http://www.lon-capa.org.
+
+
+=head1 SUBROUTINES
+
+=over
+
+=item styleparser()
+
+=item testkey()
+
+=item testvalue()
+
+=back
+
+=cut
+