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Diffstat (limited to 'resources/lib/jquery.i18n/src/jquery.i18n.parser.js')
| -rw-r--r-- | resources/lib/jquery.i18n/src/jquery.i18n.parser.js | 309 |
1 files changed, 309 insertions, 0 deletions
diff --git a/resources/lib/jquery.i18n/src/jquery.i18n.parser.js b/resources/lib/jquery.i18n/src/jquery.i18n.parser.js new file mode 100644 index 00000000..3dea2842 --- /dev/null +++ b/resources/lib/jquery.i18n/src/jquery.i18n.parser.js @@ -0,0 +1,309 @@ +/** + * jQuery Internationalization library + * + * Copyright (C) 2011-2013 Santhosh Thottingal, Neil Kandalgaonkar + * + * jquery.i18n is dual licensed GPLv2 or later and MIT. You don't have to do + * anything special to choose one license or the other and you don't have to + * notify anyone which license you are using. You are free to use + * UniversalLanguageSelector in commercial projects as long as the copyright + * header is left intact. See files GPL-LICENSE and MIT-LICENSE for details. + * + * @licence GNU General Public Licence 2.0 or later + * @licence MIT License + */ + +( function ( $ ) { + 'use strict'; + + var MessageParser = function ( options ) { + this.options = $.extend( {}, $.i18n.parser.defaults, options ); + this.language = $.i18n.languages[String.locale] || $.i18n.languages['default']; + this.emitter = $.i18n.parser.emitter; + }; + + MessageParser.prototype = { + + constructor: MessageParser, + + simpleParse: function ( message, parameters ) { + return message.replace( /\$(\d+)/g, function ( str, match ) { + var index = parseInt( match, 10 ) - 1; + + return parameters[index] !== undefined ? parameters[index] : '$' + match; + } ); + }, + + parse: function ( message, replacements ) { + if ( message.indexOf( '{{' ) < 0 ) { + return this.simpleParse( message, replacements ); + } + + this.emitter.language = $.i18n.languages[$.i18n().locale] || + $.i18n.languages['default']; + + return this.emitter.emit( this.ast( message ), replacements ); + }, + + ast: function ( message ) { + var pipe, colon, backslash, anyCharacter, dollar, digits, regularLiteral, + regularLiteralWithoutBar, regularLiteralWithoutSpace, escapedOrLiteralWithoutBar, + escapedOrRegularLiteral, templateContents, templateName, openTemplate, + closeTemplate, expression, paramExpression, result, + pos = 0; + + // Try parsers until one works, if none work return null + function choice( parserSyntax ) { + return function () { + var i, result; + + for ( i = 0; i < parserSyntax.length; i++ ) { + result = parserSyntax[i](); + + if ( result !== null ) { + return result; + } + } + + return null; + }; + } + + // Try several parserSyntax-es in a row. + // All must succeed; otherwise, return null. + // This is the only eager one. + function sequence( parserSyntax ) { + var i, res, + originalPos = pos, + result = []; + + for ( i = 0; i < parserSyntax.length; i++ ) { + res = parserSyntax[i](); + + if ( res === null ) { + pos = originalPos; + + return null; + } + + result.push( res ); + } + + return result; + } + + // Run the same parser over and over until it fails. + // Must succeed a minimum of n times; otherwise, return null. + function nOrMore( n, p ) { + return function () { + var originalPos = pos, + result = [], + parsed = p(); + + while ( parsed !== null ) { + result.push( parsed ); + parsed = p(); + } + + if ( result.length < n ) { + pos = originalPos; + + return null; + } + + return result; + }; + } + + // Helpers -- just make parserSyntax out of simpler JS builtin types + + function makeStringParser( s ) { + var len = s.length; + + return function () { + var result = null; + + if ( message.substr( pos, len ) === s ) { + result = s; + pos += len; + } + + return result; + }; + } + + function makeRegexParser( regex ) { + return function () { + var matches = message.substr( pos ).match( regex ); + + if ( matches === null ) { + return null; + } + + pos += matches[0].length; + + return matches[0]; + }; + } + + pipe = makeStringParser( '|' ); + colon = makeStringParser( ':' ); + backslash = makeStringParser( '\\' ); + anyCharacter = makeRegexParser( /^./ ); + dollar = makeStringParser( '$' ); + digits = makeRegexParser( /^\d+/ ); + regularLiteral = makeRegexParser( /^[^{}\[\]$\\]/ ); + regularLiteralWithoutBar = makeRegexParser( /^[^{}\[\]$\\|]/ ); + regularLiteralWithoutSpace = makeRegexParser( /^[^{}\[\]$\s]/ ); + + // There is a general pattern: + // parse a thing; + // if it worked, apply transform, + // otherwise return null. + // But using this as a combinator seems to cause problems + // when combined with nOrMore(). + // May be some scoping issue. + function transform( p, fn ) { + return function () { + var result = p(); + + return result === null ? null : fn( result ); + }; + } + + // Used to define "literals" within template parameters. The pipe + // character is the parameter delimeter, so by default + // it is not a literal in the parameter + function literalWithoutBar() { + var result = nOrMore( 1, escapedOrLiteralWithoutBar )(); + + return result === null ? null : result.join( '' ); + } + + function literal() { + var result = nOrMore( 1, escapedOrRegularLiteral )(); + + return result === null ? null : result.join( '' ); + } + + function escapedLiteral() { + var result = sequence( [ backslash, anyCharacter ] ); + + return result === null ? null : result[1]; + } + + choice( [ escapedLiteral, regularLiteralWithoutSpace ] ); + escapedOrLiteralWithoutBar = choice( [ escapedLiteral, regularLiteralWithoutBar ] ); + escapedOrRegularLiteral = choice( [ escapedLiteral, regularLiteral ] ); + + function replacement() { + var result = sequence( [ dollar, digits ] ); + + if ( result === null ) { + return null; + } + + return [ 'REPLACE', parseInt( result[1], 10 ) - 1 ]; + } + + templateName = transform( + // see $wgLegalTitleChars + // not allowing : due to the need to catch "PLURAL:$1" + makeRegexParser( /^[ !"$&'()*,.\/0-9;=?@A-Z\^_`a-z~\x80-\xFF+\-]+/ ), + + function ( result ) { + return result.toString(); + } + ); + + function templateParam() { + var expr, + result = sequence( [ pipe, nOrMore( 0, paramExpression ) ] ); + + if ( result === null ) { + return null; + } + + expr = result[1]; + + // use a "CONCAT" operator if there are multiple nodes, + // otherwise return the first node, raw. + return expr.length > 1 ? [ 'CONCAT' ].concat( expr ) : expr[0]; + } + + function templateWithReplacement() { + var result = sequence( [ templateName, colon, replacement ] ); + + return result === null ? null : [ result[0], result[2] ]; + } + + function templateWithOutReplacement() { + var result = sequence( [ templateName, colon, paramExpression ] ); + + return result === null ? null : [ result[0], result[2] ]; + } + + templateContents = choice( [ + function () { + var res = sequence( [ + // templates can have placeholders for dynamic + // replacement eg: {{PLURAL:$1|one car|$1 cars}} + // or no placeholders eg: + // {{GRAMMAR:genitive|{{SITENAME}}} + choice( [ templateWithReplacement, templateWithOutReplacement ] ), + nOrMore( 0, templateParam ) + ] ); + + return res === null ? null : res[0].concat( res[1] ); + }, + function () { + var res = sequence( [ templateName, nOrMore( 0, templateParam ) ] ); + + if ( res === null ) { + return null; + } + + return [ res[0] ].concat( res[1] ); + } + ] ); + + openTemplate = makeStringParser( '{{' ); + closeTemplate = makeStringParser( '}}' ); + + function template() { + var result = sequence( [ openTemplate, templateContents, closeTemplate ] ); + + return result === null ? null : result[1]; + } + + expression = choice( [ template, replacement, literal ] ); + paramExpression = choice( [ template, replacement, literalWithoutBar ] ); + + function start() { + var result = nOrMore( 0, expression )(); + + if ( result === null ) { + return null; + } + + return [ 'CONCAT' ].concat( result ); + } + + result = start(); + + /* + * For success, the pos must have gotten to the end of the input + * and returned a non-null. + * n.b. This is part of language infrastructure, so we do not throw an internationalizable message. + */ + if ( result === null || pos !== message.length ) { + throw new Error( 'Parse error at position ' + pos.toString() + ' in input: ' + message ); + } + + return result; + } + + }; + + $.extend( $.i18n.parser, new MessageParser() ); +}( jQuery ) ); |