96 lines
13 KiB
JavaScript
96 lines
13 KiB
JavaScript
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/*!
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* BIDI embedding support for jQuery.i18n
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*
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* Copyright (C) 2015, David Chan
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*
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* This code is dual licensed GPLv2 or later and MIT. You don't have to do
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* anything special to choose one license or the other and you don't have to
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* notify anyone which license you are using. You are free to use this code
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* in commercial projects as long as the copyright header is left intact.
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* See files GPL-LICENSE and MIT-LICENSE for details.
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*
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* @licence GNU General Public Licence 2.0 or later
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* @licence MIT License
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*/
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( function ( $ ) {
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'use strict';
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var strongDirRegExp;
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/**
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* Matches the first strong directionality codepoint:
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* - in group 1 if it is LTR
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* - in group 2 if it is RTL
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* Does not match if there is no strong directionality codepoint.
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*
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* Generated by UnicodeJS (see tools/strongDir) from the UCD; see
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* https://phabricator.wikimedia.org/diffusion/GUJS/ .
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*/
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// eslint-disable-next-line no-misleading-character-class
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strongDirRegExp = new RegExp(
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'(?:' +
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'(' +
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'[\u0041-\u005a\u0061-\u007a\u00aa\u00b5\u00ba\u00c0-\u00d6\u00d8-\u00f6\u00f8-\u02b8\u02bb-\u02c1\u02d0\u02d1\u02e0-\u02e4\u02ee\u0370-\u0373\u0376\u0377\u037a-\u037d\u037f\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0482\u048a-\u052f\u0531-\u0556\u0559-\u055f\u0561-\u0587\u0589\u0903-\u0939\u093b\u093d-\u0940\u0949-\u094c\u094e-\u0950\u0958-\u0961\u0964-\u0980\u0982\u0983\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd-\u09c0\u09c7\u09c8\u09cb\u09cc\u09ce\u09d7\u09dc\u09dd\u09df-\u09e1\u09e6-\u09f1\u09f4-\u09fa\u0a03\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a3e-\u0a40\u0a59-\u0a5c\u0a5e\u0a66-\u0a6f\u0a72-\u0a74\u0a83\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd-\u0ac0\u0ac9\u0acb\u0acc\u0ad0\u0ae0\u0ae1\u0ae6-\u0af0\u0af9\u0b02\u0b03\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b3e\u0b40\u0b47\u0b48\u0b4b\u0b4c\u0b57\u0b5c\u0b5d\u0b5f-\u0b61\u0b66-\u0b77\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bbe\u0bbf\u0bc1\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcc\u0bd0\u0bd7\u0be6-\u0bf2\u0c01-\u0c03\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c39\u0c3d\u0c41-\u0c44\u0c58-\u0c5a\u0c60\u0c61\u0c66-\u0c6f\u0c7f\u0c82\u0c83\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd-\u0cc4\u0cc6-\u0cc8\u0cca\u0ccb\u0cd5\u0cd6\u0cde\u0ce0\u0ce1\u0ce6-\u0cef\u0cf1\u0cf2\u0d02\u0d03\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d-\u0d40\u0d46-\u0d48\u0d4a-\u0d4c\u0d4e\u0d57\u0d5f-\u0d61\u0d66-\u0d75\u0d79-\u0d7f\u0d82\u0d83\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0dcf-\u0dd1\u0dd8-\u0ddf\u0de6-\u0def\u0df2-\u0df4\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e4f-\u0e5b\u0e81\u0e82\u0e84\u0e87\u0e88\u0e8a\u0e8d\u0e94-\u0e97\u0e99-\u0e9f\u0ea1-\u0ea3\u0ea5\u0ea7\u0eaa\u0eab\u0ead-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0ed0-\u0ed9\u0edc-\u0edf\u0f00-\u0f17\u0f1a-\u0f34\u0f36\u0f38\u0f3e-\u0f47\u0f49-\u0f6c\u0f7f\u0f85\u0f88-\u0f8c\u0fbe-\u0fc5\u0fc7-\u0fcc\u0fce-\u0fda\u1000-\u102c\u1031\u1038\u103b\u103c\u103f-\u1057\u105a-\u105d\u1061-\u1070\u1075-\u1081\u1083\u1084\u1087-\u108c\u108e-\u109c\u109e-\u10c5\u10c7\u10cd\u10d0-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1360-\u137c\u1380-\u138f\u13a0-\u13f5\u13f8-\u13fd\u1401-\u167f\u1681-\u169a\u16a0-\u16f8\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1735\u1736\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17b6\u17be-\u17c5\u17c7\u17c8\u17d4-\u17da\u17dc\u17e0-\u17e9\u1810-\u1819\u1820-\u1877\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191e\u1923-\u1926\u1929-\u192b\u1930\u1931\u1933-\u1938\u1946-\u196d\u1970-\u1974\u1980-\u19ab\u19b0-\u19c9\u19d0-\u19da\u1a00-\u1a16\u1a19\u1a1a\u1a1e-\u1a55\u1a57\u1a61\u1a63\u1a64\u1a6d-\u1a72\u1a80-\u1a89\u1a90-\u1a99\u1aa0-\u1aad\u1b04-\u1b33\u1b35\u1b3b\u1b3d-\u1b41\u1b43-\u1b4b\u1b50-\u1b6a\u1b74-\u1b7c\u1b82-\u1ba1\u1ba6\u1ba7\u1baa\u1bae-\u1be5\u1be7\u1bea-\u1bec\u1bee\u1bf2\u1bf3\u1bfc-\u1c2b\u1c34\u1c35\u1c3b-\u1c49\u1c4d-\u1c7f\u1cc0-\u1cc7\u1cd3\u1ce1\u1ce9-\u1cec\u1cee-\u1cf3\u1cf5\u1cf6\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u200e\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2119-\u211d\u2124\u2126\u2128\u212a-\u212d\u212f-\u2139\u213c-\u213f\u2145-\u2149\u214e\u214f\u2160-\u2188\u2336-\u237a\u2395\u249c-\u24e9\u26ac\u2800-\u28ff\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d70\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u3005-\u3007\u3021-\u3029\u302e\u302f\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309d-\
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')|(' +
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'[\u0590\u05be\u05c0\u05c3\u05c6\u05c8-\u05ff\u07c0-\u07ea\u07f4\u07f5\u07fa-\u0815\u081a\u0824\u0828\u082e-\u0858\u085c-\u089f\u200f\ufb1d\ufb1f-\ufb28\ufb2a-\ufb4f\u0608\u060b\u060d\u061b-\u064a\u066d-\u066f\u0671-\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u0710\u0712-\u072f\u074b-\u07a5\u07b1-\u07bf\u08a0-\u08e2\ufb50-\ufd3d\ufd40-\ufdcf\ufdf0-\ufdfc\ufdfe\ufdff\ufe70-\ufefe]|\ud802[\udc00-\udd1e]|\ud802[\udd20-\ude00]|\ud802\ude04|\ud802[\ude07-\ude0b]|\ud802[\ude10-\ude37]|\ud802[\ude3b-\ude3e]|\ud802[\ude40-\udee4]|\ud802[\udee7-\udf38]|\ud802[\udf40-\udfff]|\ud803[\udc00-\ude5f]|\ud803[\ude7f-\udfff]|\ud83a[\udc00-\udccf]|\ud83a[\udcd7-\udfff]|\ud83b[\udc00-\uddff]|\ud83b[\udf00-\udfff]|\ud83b[\udf00-\udfff]|\ud83b[\udf00-\udfff]|\ud83b[\udf00-\udfff]|\ud83b[\udf00-\udfff]|\ud83b[\udf00-\udfff]|\ud83b[\udf00-\udfff]|\ud83b[\udf00-\udfff]|\ud83b[\udf00-\udfff]|\ud83b[\udf00-\udfff]|\ud83b[\udf00-\udfff]|\ud83b[\udf00-\udfff]|\ud83b[\udf00-\udfff]|\ud83b[\ude00-\udeef]|\ud83b[\udef2-\udeff]' +
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')' +
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')'
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);
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/**
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* Gets directionality of the first strongly directional codepoint
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*
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* This is the rule the BIDI algorithm uses to determine the directionality of
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* paragraphs ( http://unicode.org/reports/tr9/#The_Paragraph_Level ) and
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* FSI isolates ( http://unicode.org/reports/tr9/#Explicit_Directional_Isolates ).
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*
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* TODO: Does not handle BIDI control characters inside the text.
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* TODO: Does not handle unallocated characters.
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*
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* @param {string} text The text from which to extract initial directionality.
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* @return {string} Directionality (either 'ltr' or 'rtl')
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*/
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function strongDirFromContent( text ) {
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var m = text.match( strongDirRegExp );
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if ( !m ) {
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return null;
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}
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if ( m[ 2 ] === undefined ) {
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return 'ltr';
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}
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return 'rtl';
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}
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$.extend( $.i18n.parser.emitter, {
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/**
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* Wraps argument with unicode control characters for directionality safety
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*
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* This solves the problem where directionality-neutral characters at the edge of
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* the argument string get interpreted with the wrong directionality from the
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* enclosing context, giving renderings that look corrupted like "(Ben_(WMF".
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*
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* The wrapping is LRE...PDF or RLE...PDF, depending on the detected
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* directionality of the argument string, using the BIDI algorithm's own "First
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* strong directional codepoint" rule. Essentially, this works round the fact that
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* there is no embedding equivalent of U+2068 FSI (isolation with heuristic
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* direction inference). The latter is cleaner but still not widely supported.
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*
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* @param {string[]} nodes The text nodes from which to take the first item.
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* @return {string} Wrapped String of content as needed.
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*/
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bidi: function ( nodes ) {
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var dir = strongDirFromContent( nodes[ 0 ] );
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if ( dir === 'ltr' ) {
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// Wrap in LEFT-TO-RIGHT EMBEDDING ... POP DIRECTIONAL FORMATTING
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return '\u202A' + nodes[ 0 ] + '\u202C';
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}
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if ( dir === 'rtl' ) {
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// Wrap in RIGHT-TO-LEFT EMBEDDING ... POP DIRECTIONAL FORMATTING
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return '\u202B' + nodes[ 0 ] + '\u202C';
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}
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// No strong directionality: do not wrap
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return nodes[ 0 ];
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}
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} );
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}( jQuery ) );
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