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Diffstat (limited to 'src/HTML5/Data.php')
-rw-r--r-- | src/HTML5/Data.php | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/src/HTML5/Data.php b/src/HTML5/Data.php new file mode 100644 index 0000000..497345f --- /dev/null +++ b/src/HTML5/Data.php @@ -0,0 +1,114 @@ +<?php + +// warning: this file is encoded in UTF-8! + +class HTML5_Data +{ + + // at some point this should be moved to a .ser file. Another + // possible optimization is to give UTF-8 bytes, not Unicode + // codepoints + // XXX: Not quite sure why it's named this; this is + // actually the numeric entity dereference table. + protected static $realCodepointTable = array( + 0x00 => 0xFFFD, // REPLACEMENT CHARACTER + 0x0D => 0x000A, // LINE FEED (LF) + 0x80 => 0x20AC, // EURO SIGN ('€') + 0x81 => 0x0081, // <control> + 0x82 => 0x201A, // SINGLE LOW-9 QUOTATION MARK ('‚') + 0x83 => 0x0192, // LATIN SMALL LETTER F WITH HOOK ('ƒ') + 0x84 => 0x201E, // DOUBLE LOW-9 QUOTATION MARK ('„') + 0x85 => 0x2026, // HORIZONTAL ELLIPSIS ('…') + 0x86 => 0x2020, // DAGGER ('†') + 0x87 => 0x2021, // DOUBLE DAGGER ('‡') + 0x88 => 0x02C6, // MODIFIER LETTER CIRCUMFLEX ACCENT ('ˆ') + 0x89 => 0x2030, // PER MILLE SIGN ('‰') + 0x8A => 0x0160, // LATIN CAPITAL LETTER S WITH CARON ('Š') + 0x8B => 0x2039, // SINGLE LEFT-POINTING ANGLE QUOTATION MARK ('‹') + 0x8C => 0x0152, // LATIN CAPITAL LIGATURE OE ('Œ') + 0x8D => 0x008D, // <control> + 0x8E => 0x017D, // LATIN CAPITAL LETTER Z WITH CARON ('Ž') + 0x8F => 0x008F, // <control> + 0x90 => 0x0090, // <control> + 0x91 => 0x2018, // LEFT SINGLE QUOTATION MARK ('‘') + 0x92 => 0x2019, // RIGHT SINGLE QUOTATION MARK ('’') + 0x93 => 0x201C, // LEFT DOUBLE QUOTATION MARK ('“') + 0x94 => 0x201D, // RIGHT DOUBLE QUOTATION MARK ('”') + 0x95 => 0x2022, // BULLET ('•') + 0x96 => 0x2013, // EN DASH ('–') + 0x97 => 0x2014, // EM DASH ('—') + 0x98 => 0x02DC, // SMALL TILDE ('˜') + 0x99 => 0x2122, // TRADE MARK SIGN ('™') + 0x9A => 0x0161, // LATIN SMALL LETTER S WITH CARON ('š') + 0x9B => 0x203A, // SINGLE RIGHT-POINTING ANGLE QUOTATION MARK ('›') + 0x9C => 0x0153, // LATIN SMALL LIGATURE OE ('œ') + 0x9D => 0x009D, // <control> + 0x9E => 0x017E, // LATIN SMALL LETTER Z WITH CARON ('ž') + 0x9F => 0x0178, // LATIN CAPITAL LETTER Y WITH DIAERESIS ('Ÿ') + ); + + protected static $namedCharacterReferences; + + protected static $namedCharacterReferenceMaxLength; + + /** + * Returns the "real" Unicode codepoint of a malformed character + * reference. + */ + public static function getRealCodepoint($ref) { + if (!isset(self::$realCodepointTable[$ref])) return false; + else return self::$realCodepointTable[$ref]; + } + + public static function getNamedCharacterReferences() { + if (!self::$namedCharacterReferences) { + self::$namedCharacterReferences = unserialize( + file_get_contents(dirname(__FILE__) . '/named-character-references.ser')); + } + return self::$namedCharacterReferences; + } + + /** + * Converts a Unicode codepoint to sequence of UTF-8 bytes. + * @note Shamelessly stolen from HTML Purifier, which is also + * shamelessly stolen from Feyd (which is in public domain). + */ + public static function utf8chr($code) { + /* We don't care: we live dangerously + * if($code > 0x10FFFF or $code < 0x0 or + ($code >= 0xD800 and $code <= 0xDFFF) ) { + // bits are set outside the "valid" range as defined + // by UNICODE 4.1.0 + return "\xEF\xBF\xBD"; + }*/ + + $x = $y = $z = $w = 0; + if ($code < 0x80) { + // regular ASCII character + $x = $code; + } else { + // set up bits for UTF-8 + $x = ($code & 0x3F) | 0x80; + if ($code < 0x800) { + $y = (($code & 0x7FF) >> 6) | 0xC0; + } else { + $y = (($code & 0xFC0) >> 6) | 0x80; + if($code < 0x10000) { + $z = (($code >> 12) & 0x0F) | 0xE0; + } else { + $z = (($code >> 12) & 0x3F) | 0x80; + $w = (($code >> 18) & 0x07) | 0xF0; + } + } + } + // set up the actual character + $ret = ''; + if($w) $ret .= chr($w); + if($z) $ret .= chr($z); + if($y) $ret .= chr($y); + $ret .= chr($x); + + return $ret; + } + +} |