charset: legend to list common scripts and features
[sheet.git] / charset.plp
index c9ef2b699501c55daf574b029e2316780d75d451..41af494365bdfb096ccde286d68a236228872a8c 100644 (file)
@@ -26,17 +26,63 @@ my $diinfo = do 'digraphs.inc.pl';
 my %di = map { $diinfo->{$_}->[0] => $_ } grep { ref $diinfo->{$_} }
        keys %$diinfo;
 
-use Encode qw(decode);
+use Encode qw(decode resolve_alias);
 # generate character table(s)
 # (~16x faster than decoding in loop;
 #  substr strings is twice as fast as splitting to an array)
-my @request = ('iso-8859-1', 'cp437');
-my @tables = map { decode($_, pack 'C*', 0..255) } @request;
+my %ALIAS = (
+#      default => [qw(unicode utf-8 iso-8859-1 cp437 -cp1252- --iso-8859-15- -koi8-f)],
+       default => [qw(unicode- utf-8 iso-8859-1 -cp1252- --iso-8859-15- cp437 -cp850)],
+       0 => [qw(cp437 cp863)],
+       1 => [qw(iso-8859-1 cp1252 MacRoman cp850)],
+       2 => [qw(iso-8859-2 cp1250 cp852 MacCentralEurRoman MacCroatian MacRumanian)],
+       5 => [qw(koi8-f iso-8859-5 cp1251 MacCyrillic cp855 cp866)],
+       7 => [qw(iso-8859-7 cp1253 MacGreek cp737 cp869)],
+       8 => [qw(iso-8859-8 cp1255 MacHebrew cp862)],
+);
+my @request = map {
+       if (my $input = $_) {
+               my %row = (offset => 0);
+               my $endpoint = 255;
+               if ($input =~ s/^--//) {
+                       $row{offset} = $endpoint > 160 ? 160 : 48;
+               }
+               elsif ($input =~ s/^-//) {
+                       $row{offset} = $endpoint > 128 ? 128 : 32;
+               }
+               if ($input =~ s/-$//) {
+                       $endpoint = $row{offset} ? $row{offset} < 160 ? 159 : 191 : 127;
+               }
+               if ($row{set} = resolve_alias($input)) {
+                       if ($row{set} eq 'Internal') {
+                               $row{table} = ' ' x ($endpoint < 255 ? 640 : 4096);
+                               $row{set} = 'Unicode BMP';
+                               $row{cell} = do 'charset-unicode.inc.pl';
+                       }
+                       elsif ($row{set} eq 'utf-8-strict') {
+                               $row{table} = undef;
+                               $row{set} = 'UTF-8';
+                               $row{cell} = do 'charset-utf8.inc.pl';
+                       }
+                       else {
+                               $row{table} = decode($row{set}, pack 'C*', $row{offset} .. $endpoint);
+                       }
+               }
+               else {
+                       print "<p>Encoding $input unknown</p>\n";
+               }
+               \%row;
+       }
+       else {
+               ();
+       }
+} map { defined $ALIAS{$_} ? @{ $ALIAS{$_} } : $_ }
+       $ENV{PATH_INFO} =~ /\w/ ? split(m{[/+\s]}, $ENV{PATH_INFO}) : 'default';
 my $NOCHAR = chr 0xFFFD;
 
-for my $cp437 (grep {$request[$_] eq 'cp437'} 0 .. $#request) {
-       substr($tables[$cp437], 237, 1) = pack 'U*', 0x3D5; # phi sign
-       substr($tables[$cp437], 0, 32) = pack 'U*', map {hex} qw(
+for my $cp437 (grep {$request[$_]->{set} eq 'cp437'} 0 .. $#request) {
+       substr($request[$cp437]->{table}, 237, 1) = pack 'U*', 0x3D5; # phi sign
+       substr($request[$cp437]->{table}, 0, 32) = pack 'U*', map {hex} qw(
                2007 263A 263B 2665 2666 2663 2660 2022 25D8 25CB 25D9 2642 2640 266A 266B 263C
                25BA 25C4 2195 203C 00B6 00A7 25AC 21A8 2191 2193 2192 2190 221F 2194 25B2 25BC
        );
@@ -53,9 +99,9 @@ sub quote {
 print "<ul>\n";
 
 my @nibble = (0..9, 'A'..'F');
-for my $tablenum (0 .. $#tables) {
+for my $row (@request) {
        print '<li><table class="glyphs">';
-       printf '<caption>%s</caption>', $request[$tablenum];
+       printf '<caption>%s</caption>', $row->{set};
        print '<col>';
        for my $section (qw{thead}) {
                print "<$section><tr><th>↱";
@@ -63,14 +109,20 @@ for my $tablenum (0 .. $#tables) {
                print "\n";
        }
        print '<tbody>';
-       for my $msb (0 .. $#nibble) {
-               print '<tr><th>', $nibble[$msb];
+       for my $msb (0 .. (length($row->{table}) || 256) - 1 >> 4) {
+               printf '<tr><th>%X', $msb + ($row->{offset} >> 4);
                for my $lsb (0 .. $#nibble) {
-                       my $glyph = substr $tables[$tablenum], ($msb<<4) + $lsb, 1;
+                       if ($row->{cell}) {
+                               print $row->{cell}->(($msb<<4) + $lsb);
+                               next;
+                       }
+
+                       my $glyph = substr $row->{table}, ($msb<<4) + $lsb, 1;
                        if ($glyph eq $NOCHAR) {
                                print '<td>';
                                next;
                        }
+
                        my $info = [ord $glyph];
                        if (defined (my $mnem = $di{ord $glyph})) {
                                $info = $diinfo->{$mnem};
@@ -91,85 +143,52 @@ for my $tablenum (0 .. $#tables) {
        print "</table>\n";
 }
 
-{
-       print '<li><table class="glyphs"><caption>UTF-8</caption><col>';
-       for my $section (qw{thead}) {
-               print "<$section><tr><th>↱";
-               print '<th>', $_ for @nibble;
-               print "\n";
-       }
-       print '<tbody>';
-       print '<tr rowspan="8">';
-       for my $msb (0 .. $#nibble) {
-               print '<tr><th>', $nibble[$msb];
-               for my $lsb (0 .. $#nibble) {
-                       my $value = ($msb<<4) + $lsb;
-                       if ($value <= 0x7F) {
-                               print '<td rowspan="8" colspan="16" class="X di-a"',
-                                     ' title="U+0000 – U+007F">Single byte ASCII'
-                                       if $value == 0;
-                       }
-                       elsif ($value <= 0xBF) {
-                               print '<td rowspan="4" colspan="16" class="X di-d"',
-                                     '>Multi-byte continuation'
-                                       if $value == 0x80;
-                       }
-                       elsif ($value <= 0xC1) {
-                               print '<td colspan="2" class="X di-b" style="border-right:none; border-bottom:none"',
-                                     ' title="U+0000 – U+007F">(Overl.)'
-                                       if $value == 0xC0;
-                       }
-                       elsif ($value <= 0xDF) {
-                               print '<td rowspan="2" colspan="14" class="X di-prop" style="border-left:none"',
-                                     ' title="U+0080 – U+03FF">2-byte sequence start'
-                                       if $value == 0xC2;
-                               print '<td rowspan="1" colspan="16" class="X di-prop" style="border-top:none"',
-                                     ' title="U+0400 – U+07FF">'
-                                       if $value == 0xD0;
-                       }
-                       elsif ($value <= 0xEF) {
-                               print '<td colspan="16" class="X di-prop"',
-                                     ' title="U+0800 – U+FFFF">3-byte sequence start'
-                                       if $value == 0xE0;
-                       }
-                       elsif ($value <= 0xF4) {
-                               print '<td colspan="5" class="X di-prop" style="border-right:none"',
-                                     ' title="U+1·0000 – U+10·FFFF">4-byte sequence'
-                                       if $value == 0xF0;
-                       }
-                       elsif ($value <= 0xF7) {
-                               print '<td colspan="3" class="X di-b" style="border-left:none"',
-                                     ' title="U+11·0000 – U+1FF·FFFF">(Overflow)'
-                                       if $value == 0xF5;
-                       }
-                       elsif ($value <= 0xFB) {
-                               print '<td colspan="4" class="X di-b"',
-                                     ' title="U+200·0000 – U+3FFF·FFFF">5-byte'
-                                       if $value == 0xF8;
-                       }
-                       elsif ($value <= 0xFD) {
-                               print '<td colspan="2" class="X di-b"',
-                                     ' title="U+4000·0000 – 7FFFF·FFFF">6-byte'
-                                       if $value == 0xFC;
-                       }
-                       elsif ($value <= 0xFF) {
-                               print '<td colspan="2" class="di-invalid">Invalid'
-                                       if $value == 0xFE;
-                       }
-                       else {
-                               print "\n".'<td class="X">?';
-                       }
-               }
-               print "\n";
-       }
-       print "</table>\n";
-}
-
 print "</ul>\n";
 
 :>
 <hr>
 
+<div class="legend">
+       <table class="glyphs"><tr>
+       <td class="X Cc">control
+       <td class="X Zs"><span>whitespace</span>
+       <td class="X Mn">diacritic<table class="glyphs"><tr>
+               <td class="X Sk">letter
+               </table>
+       <td class="X Po">punctuation<table class="glyphs"><tr>
+               <td class="X Pf">quote
+               </table>
+       <td class="X So">symbol<table class="glyphs"><tr>
+               <td class="X Sm">math
+               <td class="X Sc">currency
+               </table>
+       <td class="X No">numeric
+       <td class="X Greek">greek<table class="glyphs"><tr>
+               <td class="X Latin">latin
+               <td class="X Cyrillic">cyrillic
+               </table>
+       <td class="X Aramaic">aramaic<table class="glyphs"><tr>
+               <td class="X Brahmic">brahmic
+               <td class="X Arabic">arabic
+               </table>
+       <td class="X Syllabic">syllabic<table class="glyphs"><tr>
+               <td class="X African">african
+               <td class="X Hiragana">japanese
+               <td class="X Han">cjk
+               <td class="X Bopomofo">chinese
+               </table>
+       <td class="X Alpha">alphabetic
+       </table>
+
+       <table class="glyphs"><tr>
+       <td class="X">unicode 5.0
+       <td class="X Xr">proposed
+       <td class="X Xd">deprecated
+       <td class="">unassigned
+       <td class="X Xi">invalid
+       </table>
+</div>
+
 <p class="footer">
        <a href="http://sheet.shiar.nl/" rel="home">sheet.shiar.nl</a>/charset
        <a href="git://git.shiar.nl/sheet" rel="vcs-git" title="Git repository"><:= "v$VERSION" :></a>