return is_readable( self::getMessagesFileName( $code ) );
}
+ /**
+ * Returns true if a language code string is a well-formed language tag
+ * according to RFC 5646.
+ * This function only checks well-formedness; it doesn't check that
+ * language, script or variant codes actually exist in the repositories.
+ *
+ * Based on regexes by Mark Davis of the Unicode Consortium:
+ * http://unicode.org/repos/cldr/trunk/tools/java/org/unicode/cldr/util/data/langtagRegex.txt
+ *
+ * @param $code string
+ * @param $lenient boolean Whether to allow '_' as separator. The default is only '-'.
+ *
+ * @return bool
+ * @since 1.21
+ */
+ public static function isWellFormedLanguageTag( $code, $lenient = false ) {
+ $alpha = '[a-z]';
+ $digit = '[0-9]';
+ $alphanum = '[a-z0-9]';
+ $x = 'x' ; # private use singleton
+ $singleton = '[a-wy-z]'; # other singleton
+ $s = $lenient ? '[-_]' : '-';
+
+ $language = "$alpha{2,8}|$alpha{2,3}$s$alpha{3}";
+ $script = "$alpha{4}"; # ISO 15924
+ $region = "(?:$alpha{2}|$digit{3})"; # ISO 3166-1 alpha-2 or UN M.49
+ $variant = "(?:$alphanum{5,8}|$digit$alphanum{3})";
+ $extension = "$singleton(?:$s$alphanum{2,8})+";
+ $privateUse = "$x(?:$s$alphanum{1,8})+";
+
+ # Define certain grandfathered codes, since otherwise the regex is pretty useless.
+ # Since these are limited, this is safe even later changes to the registry --
+ # the only oddity is that it might change the type of the tag, and thus
+ # the results from the capturing groups.
+ # http://www.iana.org/assignments/language-subtag-registry
+
+ $grandfathered = "en{$s}GB{$s}oed"
+ . "|i{$s}(?:ami|bnn|default|enochian|hak|klingon|lux|mingo|navajo|pwn|tao|tay|tsu)"
+ . "|no{$s}(?:bok|nyn)"
+ . "|sgn{$s}(?:BE{$s}(?:fr|nl)|CH{$s}de)"
+ . "|zh{$s}min{$s}nan";
+
+ $variantList = "$variant(?:$s$variant)*";
+ $extensionList = "$extension(?:$s$extension)*";
+
+ $langtag = "(?:($language)"
+ . "(?:$s$script)?"
+ . "(?:$s$region)?"
+ . "(?:$s$variantList)?"
+ . "(?:$s$extensionList)?"
+ . "(?:$s$privateUse)?)";
+
+ # The final breakdown, with capturing groups for each of these components
+ # The variants, extensions, grandfathered, and private-use may have interior '-'
+
+ $root = "^(?:$langtag|$privateUse|$grandfathered)$";
+
+ return (bool)preg_match( "/$root/", strtolower( $code ) );
+ }
+
/**
* Returns true if a language code string is of a valid form, whether or
* not it exists. This includes codes which are used solely for
$form = CLDRPluralRuleEvaluator::evaluateCompiled( $number, $pluralRules );
return $form;
}
-
}
);
}
+ /**
+ * Test Language::isWellFormedLanguageTag()
+ * @dataProvider provideWellFormedLanguageTags
+ */
+ function testWellFormedLanguageTag( $code, $message = '' ) {
+ $this->assertTrue(
+ Language::isWellFormedLanguageTag( $code ),
+ "validating code $code $message"
+ );
+ }
+
+ /**
+ * The test cases are based on the tests in the GaBuZoMeu parser
+ * written by Stéphane Bortzmeyer <bortzmeyer@nic.fr>
+ * and distributed as free software, under the GNU General Public Licence.
+ * http://www.bortzmeyer.org/gabuzomeu-parsing-language-tags.html
+ */
+ function provideWellFormedLanguageTags() {
+ return array(
+ array( 'fr', 'two-letter code' ),
+ array( 'fr-latn', 'two-letter code with lower case script code' ),
+ array( 'fr-Latn-FR', 'two-letter code with title case script code and uppercase country code' ),
+ array( 'fr-Latn-419', 'two-letter code with title case script code and region number' ),
+ array( 'fr-FR', 'two-letter code with uppercase' ),
+ array( 'ax-TZ', 'Not in the registry, but well-formed' ),
+ array( 'fr-shadok', 'two-letter code with variant' ),
+ array( 'fr-y-myext-myext2', 'non-x singleton' ),
+ array( 'fra-Latn', 'ISO 639 can be 3-letters' ),
+ array( 'fra', 'three-letter language code' ),
+ array( 'fra-FX', 'three-letter language code with country code' ),
+ array( 'i-klingon', 'grandfathered with singleton' ),
+ array( 'I-kLINgon', 'tags are case-insensitive...' ),
+ array( 'no-bok', 'grandfathered without singleton' ),
+ array( 'i-enochian', 'Grandfathered' ),
+ array( 'x-fr-CH', 'private use' ),
+ array( 'es-419', 'two-letter code with region number' ),
+ array( 'en-Latn-GB-boont-r-extended-sequence-x-private', 'weird, but well-formed' ),
+ array( 'ab-x-abc-x-abc', 'anything goes after x' ),
+ array( 'ab-x-abc-a-a', 'anything goes after x, including several non-x singletons' ),
+ array( 'i-default', 'grandfathered' ),
+ array( 'abcd-Latn', 'Language of 4 chars reserved for future use' ),
+ array( 'AaBbCcDd-x-y-any-x', 'Language of 5-8 chars, registered' ),
+ array( 'de-CH-1901', 'with country and year' ),
+ array( 'en-US-x-twain', 'with country and singleton' ),
+ array( 'zh-cmn', 'three-letter variant' ),
+ array( 'zh-cmn-Hant', 'three-letter variant and script' ),
+ array( 'zh-cmn-Hant-HK', 'three-letter variant, script and country' ),
+ array( 'xr-p-lze', 'Extension' ),
+ );
+ }
+
+ /**
+ * Negative test for Language::isWellFormedLanguageTag()
+ * @dataProvider provideMalformedLanguageTags
+ */
+ function testMalformedLanguageTag( $code, $message = '' ) {
+ $this->assertFalse(
+ Language::isWellFormedLanguageTag( $code ),
+ "validating that code $code is a malformed language tag - $message"
+ );
+ }
+
+ /**
+ * The test cases are based on the tests in the GaBuZoMeu parser
+ * written by Stéphane Bortzmeyer <bortzmeyer@nic.fr>
+ * and distributed as free software, under the GNU General Public Licence.
+ * http://www.bortzmeyer.org/gabuzomeu-parsing-language-tags.html
+ */
+ function provideMalformedLanguageTags() {
+ return array(
+ array( 'f', 'language too short' ),
+ array( 'f-Latn', 'language too short with script' ),
+ array( 'xr-lxs-qut', 'variants too short' ), # extlangS
+ array( 'fr-Latn-F', 'region too short' ),
+ array( 'a-value', 'language too short with region' ),
+ array( 'tlh-a-b-foo', 'valid three-letter with wrong variant' ),
+ array( 'i-notexist', 'grandfathered but not registered: invalid, even if we only test well-formedness' ),
+ array( 'abcdefghi-012345678', 'numbers too long' ),
+ array( 'ab-abc-abc-abc-abc', 'invalid extensions' ),
+ array( 'ab-abcd-abc', 'invalid extensions' ),
+ array( 'ab-ab-abc', 'invalid extensions' ),
+ array( 'ab-123-abc', 'invalid extensions' ),
+ array( 'a-Hant-ZH', 'short language with valid extensions' ),
+ array( 'a1-Hant-ZH', 'invalid character in language' ),
+ array( 'ab-abcde-abc', 'invalid extensions' ),
+ array( 'ab-1abc-abc', 'invalid characters in extensions' ),
+ array( 'ab-ab-abcd', 'invalid order of extensions' ),
+ array( 'ab-123-abcd', 'invalid order of extensions' ),
+ array( 'ab-abcde-abcd', 'invalid extensions' ),
+ array( 'ab-1abc-abcd', 'invalid characters in extensions' ),
+ array( 'ab-a-b', 'extensions too short' ),
+ array( 'ab-a-x', 'extensions too short, even with singleton' ),
+ array( 'ab--ab', 'two separators' ),
+ array( 'ab-abc-', 'separator in the end' ),
+ array( '-ab-abc', 'separator in the beginning' ),
+ array( 'abcd-efg', 'language too long' ),
+ array( 'aabbccddE', 'tag too long' ),
+ array( 'pa_guru', 'A tag with underscore is invalid in strict mode' ),
+ array( 'de-f', 'subtag too short' ),
+ );
+ }
+
+ /**
+ * Negative test for Language::isWellFormedLanguageTag()
+ */
+ function testLenientLanguageTag() {
+ $this->assertTrue(
+ Language::isWellFormedLanguageTag( 'pa_guru', true ),
+ 'pa_guru is a well-formed language tag in lenient mode'
+ );
+ }
+
/**
* Test Language::isValidBuiltInCode()
* @dataProvider provideLanguageCodes
dépôts / lhc / web / wiklou.git / commitdiff