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Diffstat (limited to 'platform/www/inc/Utf8/Asian.php')
-rw-r--r-- | platform/www/inc/Utf8/Asian.php | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/platform/www/inc/Utf8/Asian.php b/platform/www/inc/Utf8/Asian.php new file mode 100644 index 0000000..c7baa30 --- /dev/null +++ b/platform/www/inc/Utf8/Asian.php @@ -0,0 +1,99 @@ +<?php + +namespace dokuwiki\Utf8; + +/** + * Methods and constants to handle Asian "words" + * + * This uses a crude regexp to determine which parts of an Asian string should be treated as words. + * This is necessary because in some Asian languages a single unicode char represents a whole idea + * without spaces separating them. + */ +class Asian +{ + + /** + * This defines a non-capturing group for the use in regular expressions to match any asian character that + * needs to be treated as a word. Uses the Unicode-Ranges for Asian characters taken from + * http://en.wikipedia.org/wiki/Unicode_block + */ + const REGEXP = + '(?:' . + + '[\x{0E00}-\x{0E7F}]' . // Thai + + '|' . + + '[' . + '\x{2E80}-\x{3040}' . // CJK -> Hangul + '\x{309D}-\x{30A0}' . + '\x{30FD}-\x{31EF}\x{3200}-\x{D7AF}' . + '\x{F900}-\x{FAFF}' . // CJK Compatibility Ideographs + '\x{FE30}-\x{FE4F}' . // CJK Compatibility Forms + "\xF0\xA0\x80\x80-\xF0\xAA\x9B\x9F" . // CJK Extension B + "\xF0\xAA\x9C\x80-\xF0\xAB\x9C\xBF" . // CJK Extension C + "\xF0\xAB\x9D\x80-\xF0\xAB\xA0\x9F" . // CJK Extension D + "\xF0\xAF\xA0\x80-\xF0\xAF\xAB\xBF" . // CJK Compatibility Supplement + ']' . + + '|' . + + '[' . // Hiragana/Katakana (can be two characters) + '\x{3042}\x{3044}\x{3046}\x{3048}' . + '\x{304A}-\x{3062}\x{3064}-\x{3082}' . + '\x{3084}\x{3086}\x{3088}-\x{308D}' . + '\x{308F}-\x{3094}' . + '\x{30A2}\x{30A4}\x{30A6}\x{30A8}' . + '\x{30AA}-\x{30C2}\x{30C4}-\x{30E2}' . + '\x{30E4}\x{30E6}\x{30E8}-\x{30ED}' . + '\x{30EF}-\x{30F4}\x{30F7}-\x{30FA}' . + '][' . + '\x{3041}\x{3043}\x{3045}\x{3047}\x{3049}' . + '\x{3063}\x{3083}\x{3085}\x{3087}\x{308E}\x{3095}-\x{309C}' . + '\x{30A1}\x{30A3}\x{30A5}\x{30A7}\x{30A9}' . + '\x{30C3}\x{30E3}\x{30E5}\x{30E7}\x{30EE}\x{30F5}\x{30F6}\x{30FB}\x{30FC}' . + '\x{31F0}-\x{31FF}' . + ']?' . + ')'; + + + /** + * Check if the given term contains Asian word characters + * + * @param string $term + * @return bool + */ + public static function isAsianWords($term) + { + return (bool)preg_match('/' . self::REGEXP . '/u', $term); + } + + /** + * Surround all Asian words in the given text with the given separator + * + * @param string $text Original text containing asian words + * @param string $sep the separator to use + * @return string Text with separated asian words + */ + public static function separateAsianWords($text, $sep = ' ') + { + // handle asian chars as single words (may fail on older PHP version) + $asia = @preg_replace('/(' . self::REGEXP . ')/u', $sep . '\1' . $sep, $text); + if (!is_null($asia)) $text = $asia; // recover from regexp falure + + return $text; + } + + /** + * Split the given text into separate parts + * + * Each part is either a non-asian string, or a single asian word + * + * @param string $term + * @return string[] + */ + public static function splitAsianWords($term) + { + return preg_split('/(' . self::REGEXP . '+)/u', $term, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY); + } +} |