1 files changed, 90 insertions, 0 deletions
diff --git a/www/wiki/extensions/SemanticMediaWiki/src/Utils/CharExaminer.php b/www/wiki/extensions/SemanticMediaWiki/src/Utils/CharExaminer.php
new file mode 100644
index 00000000..e7d07c48
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+++ b/www/wiki/extensions/SemanticMediaWiki/src/Utils/CharExaminer.php
@@ -0,0 +1,90 @@
+<?php
+
+namespace SMW\Utils;
+
+/**
+ * @license GNU GPL v2+
+ * @since 3.0
+ *
+ * @author mwjames
+ */
+class CharExaminer {
+
+	const CYRILLIC = 'CYRILLIC';
+	const LATIN = 'LATIN';
+	const HIRAGANA_KATAKANA = 'HIRAGANA_KATAKANA';
+	const HANGUL = 'HANGUL';
+	const CJK_UNIFIED = 'CJK_UNIFIED';
+	const HAN = 'HAN';
+
+	/**
+	 * @since 3.0
+	 *
+	 * @param string $text
+	 *
+	 * @return boolean
+	 */
+	public static function isCJK( $text ) {
+
+		if ( self::contains( self::HAN, $text ) ) {
+			return true;
+		}
+
+		if ( self::contains( self::HIRAGANA_KATAKANA, $text ) ) {
+			return true;
+		}
+
+		if ( self::contains( self::HANGUL, $text ) ) {
+			return true;
+		}
+
+		if ( self::contains( self::CJK_UNIFIED, $text ) ) {
+			return true;
+		}
+
+		return false;
+	}
+
+	/**
+	 * @see http://jrgraphix.net/research/unicode_blocks.php
+	 * @since 0.1
+	 *
+	 * @param string $type
+	 * @param string $text
+	 *
+	 * @return boolean
+	 */
+	public static function contains( $type, $text ) {
+
+		if ( $type === self::CYRILLIC ) {
+			return preg_match('/\p{Cyrillic}/u', $text ) > 0;
+		}
+
+		if ( $type === self::LATIN ) {
+			return preg_match('/\p{Latin}/u', $text ) > 0;
+		}
+
+		if ( $type === self::HAN ) {
+			return preg_match('/\p{Han}/u', $text ) > 0;
+		}
+
+		if ( $type === self::HIRAGANA_KATAKANA ) {
+			return preg_match('/[\x{3040}-\x{309F}]/u', $text ) > 0 || preg_match('/[\x{30A0}-\x{30FF}]/u', $text ) > 0; // isHiragana || isKatakana
+		}
+
+		if ( $type === self::HANGUL ) {
+			return preg_match('/[\x{3130}-\x{318F}]/u', $text ) > 0 || preg_match('/[\x{AC00}-\x{D7AF}]/u', $text ) > 0;
+		}
+
+		// @see https://en.wikipedia.org/wiki/CJK_Unified_Ideographs
+		// Chinese, Japanese and Korean (CJK) scripts share common characters
+		// known as CJK characters
+
+		if ( $type === self::CJK_UNIFIED ) {
+			return preg_match('/[\x{4e00}-\x{9fa5}]/u', $text ) > 0;
+		}
+
+		return false;
+	}
+
+}