# Blosxom Plugin: ss_selector
# Author(s): mustan <shb@mustan.sakura.ne.jp> 
# Version: 2005-04-17

package ss_selector;

use strict;
use vars qw($header $debugMes $form);

my (@styleTitle, @stylePath, @styleMedia);
my $styleNum = 0;
my ($form_label, $form_button, $form_accesskey,
    $no_styleTitle,
    $cookie_path,
    $use_xhtml, $xhtml_endTag);
my (%COOKIES, %FORM);

# --- Configurable variables -----
$form_label  = 'Select Style'; # Character string displayed in label of form
$form_accesskey = 'S'; # Key to activate selection box
$form_button = 'submit'; # Character string displayed in submit button
$no_styleTitle = 'No-Style'; # Character string when style is not applied
$cookie_path = '/'; # Preservation path of Cookie
$use_xhtml = 0; # 0: XHTML Mode is not Applied  1: XHTML Mode is Applied

#&add_style('Style Title', 'Style URL', 'Media Type');
# ex)&add_style('WhiteBack', 'http://mustan.sakura.ne.jp/style/whiteback.css', 'screen,tv');
#---------------------------------

&add_style($no_styleTitle, "", "");

if($use_xhtml == 1){
  $xhtml_endTag = ' /';
}

&readForm();
&get_cookies();

sub start{

  my $count;
  my $ss;
  my $f_findFirstStyle = 0;

  if($FORM{'ss'}){
    for($count=0;$count<$styleNum;$count++){
      if($FORM{'ss'} eq $styleTitle[$count]){
        if($FORM{'ss'} ne $no_styleTitle){
          $header =
<<OUTPUT;
<link rel="stylesheet" type="text/css" href="$stylePath[$count]" title="$styleTitle[$count]" media="$styleMedia[$count]"$xhtml_endTag>
OUTPUT
        }
        $f_findFirstStyle = 1;          
        &set_cookie("ss", "$FORM{'ss'}", 30, $cookie_path);
        last;
      }
    }
  }
  elsif($COOKIES{'ss'}){
    for($count=0;$count<$styleNum;$count++){
      if($COOKIES{'ss'} eq $styleTitle[$count]){
        if($COOKIES{'ss'} ne $no_styleTitle){
          $header =
<<OUTPUT;
<link rel="stylesheet" type="text/css" href="$stylePath[$count]" title="$styleTitle[$count]" media="$styleMedia[$count]"$xhtml_endTag>
OUTPUT
        }
        $f_findFirstStyle = 1;
        &set_cookie("ss", "$styleTitle[$count]", 30, $cookie_path);
        last;
      }
    }
  }

  for($count=0;$count<$styleNum;$count++){
    if($f_findFirstStyle == 0){
      $header =
<<OUTPUT;
<link rel="stylesheet" type="text/css" href="$stylePath[$count]" title="$styleTitle[$count]" media="$styleMedia[$count]"$xhtml_endTag>
OUTPUT
      $f_findFirstStyle = 1;
      &set_cookie("ss", "$styleTitle[$count]", 30, $cookie_path);
    }
    elsif(($styleTitle[$count] ne $COOKIES{'ss'}) && ($stylePath[$count]) && ($f_findFirstStyle == 1)){
      $header .=
<<OUTPUT
<link rel="alternate stylesheet" type="text/css" href="$stylePath[$count]" title="$styleTitle[$count]" media="$styleMedia[$count]"$xhtml_endTag>
OUTPUT
    }
  }
  $header =~ s/\n$//;

  1;
}

sub filter{

  my $options;
  my $count;

  $form = 
<<OUT;
<form id="ss_selectorForm" method="get" action="$blosxom::url$ENV{'PATH_INFO'}">
<p id="ss_selectorForm_paragraph">
::label::
<input type="submit" value="$form_button"$xhtml_endTag>
</p>
</form>
OUT

  if($form_label){
    $form =~ s/::label::/<label for=\"ss_selector_selectbox\" accesskey=\"::form_accesskey::\">\n$form_label ::form_accesskey:: \n::label::\n<\/label>/;
    if($form_accesskey){
      $form =~ s/::form_accesskey::/$form_accesskey/;
      $form =~ s/ ::form_accesskey:: /<sup>\($form_accesskey\)<\/sup>/;
    }
  }
  
  for($count=0;$count<$styleNum;$count++){
    if($styleTitle[$count] eq $COOKIES{'ss'}){
      $options .= "<option value=\"$styleTitle[$count]\" label=\"$styleTitle[$count]\" selected>$styleTitle[$count]<\/option>\n";
    }
    elsif($styleTitle[$count]){
      $options .= "<option value=\"$styleTitle[$count]\" label=\"$styleTitle[$count]\">$styleTitle[$count]<\/option>\n";
    }
  }
  $form =~ s/::label::/<select name=\"ss\" id=\"ss_selector_selectbox\">\n$options<\/select>/;

  return 1;
}

sub add_style {


  $styleTitle[$styleNum] = $_[0];
  $stylePath[$styleNum]  = $_[1];
  if(!$_[2]){
    $styleMedia[$styleNum] = 'all';
  }
  else{
    $styleMedia[$styleNum] = $_[2];
  }

  $styleNum = $styleNum + 1;

  return 1;
}

sub get_cookies{
  my ($work, $name, $value);
  for $work (split(/; */, $ENV{'HTTP_COOKIE'})) {
      ($name, $value) = split(/=/, $work);
      $value =~ s/%([0-9A-Fa-f][0-9A-Fa-f])/pack("C", hex($1))/eg;
      $COOKIES{$name} = $value;
  }
  
  return 1;
}

sub set_cookie{
  my($str, $limit, $value, $path);

  if(!$cookie_path){
    $path = '/';
  }

  $COOKIES{$_[0]} = $_[1];
  $value = $_[1];
  $value =~ s/(\W)/sprintf("%%%02X", unpack("C", $1))/eg;
  $limit = gmtime(time + (86400 * $_[2]));
  $limit =~ s/^(...) (...) (..) (........) (....).*/$1, $3-$2-$5 $4 GMT\;/;

  if ($_[3] ne '') {
    $path = " path=$_[3];";
  }
  else {
    $path = '';
  }

  if ($_[4] == 0) {
    print "Set-Cookie: $_[0]=$value; expires=$limit$path\n";
  }
  elsif($_[4] == 2){
    print "Set-Cookie: expires=$limit$path\n";
  }
#  else {
#    print "<meta http-equiv=\"Set-Cookie\" content=\"$_[0]=$value; expires=$limit$path\">\n";
#  }

}

sub readForm{
  my ($query_string, $work, @work, $name, $value);
  if ($ENV{'REQUEST_METHOD'} eq "POST") {
#    read(STDIN, $query_string, $ENV{'CONTENT_LENGTH'});
    $query_string = '';
  }
  else {
    $query_string = $ENV{'QUERY_STRING'};
  }
  @work = split(/&/, $query_string);
  foreach $work (@work) {
    ($name, $value) = split(/=/, $work);
    $value =~ tr/+/ /;
    $value =~ s/%([0-9a-fA-F][0-9a-fA-F])/pack("C", hex($1))/eg;
#    &jcode'convert(*value, "euc");
    $FORM{$name} = $value;
  }
}

1;

__END__


=head1 NAME

Blosxom Plug-in: ss_selector