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/**
* 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 MessageParserEmitter = function () {
this.language = $.i18n.languages[String.locale] || $.i18n.languages['default'];
};
MessageParserEmitter.prototype = {
constructor: MessageParserEmitter,
/**
* (We put this method definition here, and not in prototype, to make
* sure it's not overwritten by any magic.) Walk entire node structure,
* applying replacements and template functions when appropriate
*
* @param {Mixed} node abstract syntax tree (top node or subnode)
* @param {Array} replacements for $1, $2, ... $n
* @return {Mixed} single-string node or array of nodes suitable for
* jQuery appending.
*/
emit: function ( node, replacements ) {
var ret, subnodes, operation,
messageParserEmitter = this;
switch ( typeof node ) {
case 'string':
case 'number':
ret = node;
break;
case 'object':
// node is an array of nodes
subnodes = $.map( node.slice( 1 ), function ( n ) {
return messageParserEmitter.emit( n, replacements );
} );
operation = node[0].toLowerCase();
if ( typeof messageParserEmitter[operation] === 'function' ) {
ret = messageParserEmitter[operation]( subnodes, replacements );
} else {
throw new Error( 'unknown operation "' + operation + '"' );
}
break;
case 'undefined':
// Parsing the empty string (as an entire expression, or as a
// paramExpression in a template) results in undefined
// Perhaps a more clever parser can detect this, and return the
// empty string? Or is that useful information?
// The logical thing is probably to return the empty string here
// when we encounter undefined.
ret = '';
break;
default:
throw new Error( 'unexpected type in AST: ' + typeof node );
}
return ret;
},
/**
* Parsing has been applied depth-first we can assume that all nodes
* here are single nodes Must return a single node to parents -- a
* jQuery with synthetic span However, unwrap any other synthetic spans
* in our children and pass them upwards
*
* @param {Array} nodes Mixed, some single nodes, some arrays of nodes.
* @return String
*/
concat: function ( nodes ) {
var result = '';
$.each( nodes, function ( i, node ) {
// strings, integers, anything else
result += node;
} );
return result;
},
/**
* Return escaped replacement of correct index, or string if
* unavailable. Note that we expect the parsed parameter to be
* zero-based. i.e. $1 should have become [ 0 ]. if the specified
* parameter is not found return the same string (e.g. "$99" ->
* parameter 98 -> not found -> return "$99" ) TODO throw error if
* nodes.length > 1 ?
*
* @param {Array} nodes One element, integer, n >= 0
* @param {Array} replacements for $1, $2, ... $n
* @return {string} replacement
*/
replace: function ( nodes, replacements ) {
var index = parseInt( nodes[0], 10 );
if ( index < replacements.length ) {
// replacement is not a string, don't touch!
return replacements[index];
} else {
// index not found, fallback to displaying variable
return '$' + ( index + 1 );
}
},
/**
* Transform parsed structure into pluralization n.b. The first node may
* be a non-integer (for instance, a string representing an Arabic
* number). So convert it back with the current language's
* convertNumber.
*
* @param {Array} nodes List [ {String|Number}, {String}, {String} ... ]
* @return {String} selected pluralized form according to current
* language.
*/
plural: function ( nodes ) {
var count = parseFloat( this.language.convertNumber( nodes[0], 10 ) ),
forms = nodes.slice( 1 );
return forms.length ? this.language.convertPlural( count, forms ) : '';
},
/**
* Transform parsed structure into gender Usage
* {{gender:gender|masculine|feminine|neutral}}.
*
* @param {Array} nodes List [ {String}, {String}, {String} , {String} ]
* @return {String} selected gender form according to current language
*/
gender: function ( nodes ) {
var gender = nodes[0],
forms = nodes.slice( 1 );
return this.language.gender( gender, forms );
},
/**
* Transform parsed structure into grammar conversion. Invoked by
* putting {{grammar:form|word}} in a message
*
* @param {Array} nodes List [{Grammar case eg: genitive}, {String word}]
* @return {String} selected grammatical form according to current
* language.
*/
grammar: function ( nodes ) {
var form = nodes[0],
word = nodes[1];
return word && form && this.language.convertGrammar( word, form );
}
};
$.extend( $.i18n.parser.emitter, new MessageParserEmitter() );
}( jQuery ) );
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