115 lines
4.3 KiB
PHP
115 lines
4.3 KiB
PHP
<?php
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// warning: this file is encoded in UTF-8!
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class HTML5_Data
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{
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// at some point this should be moved to a .ser file. Another
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// possible optimization is to give UTF-8 bytes, not Unicode
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// codepoints
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// XXX: Not quite sure why it's named this; this is
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// actually the numeric entity dereference table.
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protected static $realCodepointTable = array(
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0x00 => 0xFFFD, // REPLACEMENT CHARACTER
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0x0D => 0x000A, // LINE FEED (LF)
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0x80 => 0x20AC, // EURO SIGN ('€')
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0x81 => 0x0081, // <control>
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0x82 => 0x201A, // SINGLE LOW-9 QUOTATION MARK ('‚')
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0x83 => 0x0192, // LATIN SMALL LETTER F WITH HOOK ('ƒ')
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0x84 => 0x201E, // DOUBLE LOW-9 QUOTATION MARK ('„')
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0x85 => 0x2026, // HORIZONTAL ELLIPSIS ('…')
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0x86 => 0x2020, // DAGGER ('†')
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0x87 => 0x2021, // DOUBLE DAGGER ('‡')
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0x88 => 0x02C6, // MODIFIER LETTER CIRCUMFLEX ACCENT ('ˆ')
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0x89 => 0x2030, // PER MILLE SIGN ('‰')
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0x8A => 0x0160, // LATIN CAPITAL LETTER S WITH CARON ('Š')
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0x8B => 0x2039, // SINGLE LEFT-POINTING ANGLE QUOTATION MARK ('‹')
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0x8C => 0x0152, // LATIN CAPITAL LIGATURE OE ('Œ')
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0x8D => 0x008D, // <control>
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0x8E => 0x017D, // LATIN CAPITAL LETTER Z WITH CARON ('Ž')
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0x8F => 0x008F, // <control>
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0x90 => 0x0090, // <control>
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0x91 => 0x2018, // LEFT SINGLE QUOTATION MARK ('‘')
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0x92 => 0x2019, // RIGHT SINGLE QUOTATION MARK ('’')
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0x93 => 0x201C, // LEFT DOUBLE QUOTATION MARK ('“')
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0x94 => 0x201D, // RIGHT DOUBLE QUOTATION MARK ('”')
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0x95 => 0x2022, // BULLET ('•')
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0x96 => 0x2013, // EN DASH ('–')
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0x97 => 0x2014, // EM DASH ('—')
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0x98 => 0x02DC, // SMALL TILDE ('˜')
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0x99 => 0x2122, // TRADE MARK SIGN ('™')
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0x9A => 0x0161, // LATIN SMALL LETTER S WITH CARON ('š')
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0x9B => 0x203A, // SINGLE RIGHT-POINTING ANGLE QUOTATION MARK ('›')
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0x9C => 0x0153, // LATIN SMALL LIGATURE OE ('œ')
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0x9D => 0x009D, // <control>
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0x9E => 0x017E, // LATIN SMALL LETTER Z WITH CARON ('ž')
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0x9F => 0x0178, // LATIN CAPITAL LETTER Y WITH DIAERESIS ('Ÿ')
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);
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protected static $namedCharacterReferences;
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protected static $namedCharacterReferenceMaxLength;
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/**
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* Returns the "real" Unicode codepoint of a malformed character
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* reference.
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*/
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public static function getRealCodepoint($ref) {
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if (!isset(self::$realCodepointTable[$ref])) return false;
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else return self::$realCodepointTable[$ref];
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}
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public static function getNamedCharacterReferences() {
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if (!self::$namedCharacterReferences) {
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self::$namedCharacterReferences = unserialize(
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file_get_contents(dirname(__FILE__) . '/named-character-references.ser'));
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}
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return self::$namedCharacterReferences;
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}
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/**
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* Converts a Unicode codepoint to sequence of UTF-8 bytes.
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* @note Shamelessly stolen from HTML Purifier, which is also
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* shamelessly stolen from Feyd (which is in public domain).
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*/
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public static function utf8chr($code) {
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/* We don't care: we live dangerously
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* if($code > 0x10FFFF or $code < 0x0 or
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($code >= 0xD800 and $code <= 0xDFFF) ) {
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// bits are set outside the "valid" range as defined
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// by UNICODE 4.1.0
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return "\xEF\xBF\xBD";
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}*/
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$x = $y = $z = $w = 0;
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if ($code < 0x80) {
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// regular ASCII character
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$x = $code;
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} else {
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// set up bits for UTF-8
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$x = ($code & 0x3F) | 0x80;
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if ($code < 0x800) {
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$y = (($code & 0x7FF) >> 6) | 0xC0;
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} else {
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$y = (($code & 0xFC0) >> 6) | 0x80;
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if($code < 0x10000) {
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$z = (($code >> 12) & 0x0F) | 0xE0;
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} else {
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$z = (($code >> 12) & 0x3F) | 0x80;
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$w = (($code >> 18) & 0x07) | 0xF0;
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}
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}
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}
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// set up the actual character
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$ret = '';
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if($w) $ret .= chr($w);
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if($z) $ret .= chr($z);
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if($y) $ret .= chr($y);
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$ret .= chr($x);
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return $ret;
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}
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}
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