charset.plp

   1 <(common.inc.plp)><:
   2
   3 Html({
   4         title => 'charset cheat sheet',
   5         version => 'v1.0',
   6         description => [
   7                 "Reference sheet with all glyphs in common character encoding tables,",
   8                 "and an overview of Unicode ranges and UTF-8 bytes.",
   9         ],
  10         keywords => [qw'
  11                 charset codepage unicode ascii utf8 latin glyph character encoding
  12                 reference common overview table
  13         '],
  14         stylesheet => [qw'light'],
  15         data => [qw'charset-unicode.inc.pl charset-utf8.inc.pl'],
  16 });
  17
  18 :>
  19 <h1>Character encoding</h1>
  20
  21 <:
  22 use Shiar_Sheet::FormatChar;
  23 my $glyphs = Shiar_Sheet::FormatChar->new;
  24
  25 use Encode qw(decode resolve_alias);
  26 # generate character table(s)
  27 # (~16x faster than decoding in loop;
  28 #  substr strings is twice as fast as splitting to an array)
  29 my %ALIAS = (
  30 #       default => [qw(unicode utf-8 iso-8859-1 cp437 -cp1252- --iso-8859-15- -koi8-f)],
  31         default => [qw(unicode- utf-8 iso-8859-1 -cp1252- --iso-8859-15- cp437 -cp850)],
  32         0 => [qw(cp437 cp863)],
  33         1 => [qw(iso-8859-1 cp1252 MacRoman cp850)],
  34         2 => [qw(iso-8859-2 cp1250 cp852 MacCentralEurRoman MacCroatian MacRumanian)],
  35         5 => [qw(koi8-f iso-8859-5 cp1251 MacCyrillic cp855 cp866)],
  36         7 => [qw(iso-8859-7 cp1253 MacGreek cp737 cp869)],
  37         8 => [qw(iso-8859-8 cp1255 MacHebrew cp862)],
  38 );
  39 my @request = map {
  40         if (my $input = $_) {
  41                 my %row = (offset => 0);
  42                 my $endpoint = 255;
  43                 if ($input =~ s/^--//) {
  44                         $row{offset} = $endpoint > 160 ? 160 : 48;
  45                 }
  46                 elsif ($input =~ s/^-//) {
  47                         $row{offset} = $endpoint > 128 ? 128 : 32;
  48                 }
  49                 if ($input =~ s/-$//) {
  50                         $endpoint = $row{offset} ? $row{offset} < 160 ? 159 : 191 : 127;
  51                 }
  52
  53                 if ($input =~ /^U([0-9a-f]+)(?:-([0-9a-f]+))?/) {
  54                         my $start = hex($1) << ($2 ? 4 : 8);
  55                         my $end = $2 ? hex($2) << 4 : $start + 240;
  56                         $row{table} = join '', map { chr } $start .. $end+15;
  57                         utf8::upgrade($row{table});  # prevent latin1 output
  58                         $row{set} = sprintf 'Unicode block U+%02Xxx', $start >> 8;
  59                 }
  60                 elsif ($input eq 'U') {
  61                         $row{table} = ' ' x 512;
  62                         $row{set} = 'Unicode planes';
  63                         $row{cell} = do 'charset-ucplanes.inc.pl';
  64                 }
  65                 elsif ($row{set} = resolve_alias($input)) {
  66                         if ($row{set} eq 'Internal') {
  67                                 $row{table} = ' ' x ($endpoint < 255 ? 640 : 4096);
  68                                 $row{set} = 'Unicode BMP';
  69                                 $row{cell} = do 'charset-unicode.inc.pl';
  70                         }
  71                         elsif ($row{set} eq 'utf-8-strict') {
  72                                 $row{table} = undef;
  73                                 $row{set} = 'UTF-8';
  74                                 $row{cell} = do 'charset-utf8.inc.pl';
  75                         }
  76                         else {
  77                                 $row{table} = decode($row{set}, pack 'C*', $row{offset} .. $endpoint);
  78                         }
  79                 }
  80                 else {
  81                         print "<p>Encoding $input unknown</p>\n";
  82                 }
  83                 \%row;
  84         }
  85         else {
  86                 ();
  87         }
  88 } map { defined $ALIAS{$_} ? @{ $ALIAS{$_} } : $_ }
  89         $ENV{PATH_INFO} =~ /\w/ ? split(m{[/+\s]}, $ENV{PATH_INFO}) : 'default';
  90 my $NOCHAR = chr 0xFFFD;
  91
  92 for my $cp437 (grep {$request[$_]->{set} eq 'cp437'} 0 .. $#request) {
  93         substr($request[$cp437]->{table}, 237, 1) = pack 'U*', 0x3D5; # phi sign
  94         substr($request[$cp437]->{table}, 0, 32) = pack 'U*', map {hex} qw(
  95                 2007 263A 263B 2665 2666 2663 2660 2022 25D8 25CB 25D9 2642 2640 266A 266B 263C
  96                 25BA 25C4 2195 203C 00B6 00A7 25AC 21A8 2191 2193 2192 2190 221F 2194 25B2 25BC
  97         );
  98 }
  99
 100 my @nibble = (0..9, 'A'..'F');
 101 for my $row (@request) {
 102         printf '<div class="section"><table class="glyphs%s">', !$row->{cell} && ' charmap';
 103         printf '<caption>%s</caption>', $row->{set};
 104         print '<col>' x 17;
 105         for my $section (qw{thead}) {
 106                 print "<$section><tr><th>↱";
 107                 print '<th>', $_ for @nibble;
 108                 print "\n";
 109         }
 110         print '<tbody>';
 111         for my $msb (0 .. (length($row->{table}) || 256) - 1 >> 4) {
 112                 printf '<tr><th>%X', $msb + ($row->{offset} >> 4);
 113                 for my $lsb (0 .. $#nibble) {
 114                         if ($row->{cell}) {
 115                                 print $row->{cell}->(($msb<<4) + $lsb);
 116                                 next;
 117                         }
 118
 119                         my $glyph = substr $row->{table}, ($msb<<4) + $lsb, 1;
 120                         if ($glyph eq $NOCHAR) {
 121                                 print '<td>';
 122                                 next;
 123                         }
 124
 125                         print "\n".$glyphs->glyph_cell($glyph);
 126                 }
 127                 print "\n";
 128         }
 129         print "</table></div>\n";
 130 }
 131
 132 :>
 133 <hr>
 134
 135 <div class="legend">
 136         <table class="glyphs"><tr>
 137         <td class="X Cc">control
 138         <td class="X Zs"><span>whitespace</span>
 139         <td class="X Mn">diacritic<table class="glyphs"><tr>
 140                 <td class="X Sk">letter
 141                 </table>
 142         <td class="X Po">punctuation<table class="glyphs"><tr>
 143                 <td class="X Pf">quote
 144                 </table>
 145         <td class="X So">symbol<table class="glyphs"><tr>
 146                 <td class="X Sm">math
 147                 <td class="X Sc">currency
 148                 </table>
 149         <td class="X No">numeric
 150         <td class="X Greek">greek<table class="glyphs"><tr>
 151                 <td class="X Latin">latin
 152                 <td class="X Cyrillic">cyrillic
 153                 </table>
 154         <td class="X Aramaic">aramaic<table class="glyphs"><tr>
 155                 <td class="X Brahmic">brahmic
 156                 <td class="X Arabic">arabic
 157                 </table>
 158         <td class="X Syllabic">syllabic<table class="glyphs"><tr>
 159                 <td class="X African">african
 160                 <td class="X Hiragana">japanese
 161                 <td class="X Han">cjk
 162                 <td class="X Bopomofo">chinese
 163                 </table>
 164         <td class="X Alpha">alphabetic
 165         </table>
 166
 167         <table class="glyphs"><tr>
 168         <td class="X">unicode 7.0
 169         <td class="X Xr">proposed
 170         <td class="X Xd">deprecated
 171         <td class="">unassigned
 172         <td class="X Xi">invalid
 173         </table>
 174 </div>
 175