mediawiki.jqueryMsg: Reorder more code for readability

Some variables don't need to be declared at the top of the
relevant scope if they are only used after they are defined,
since we no longer enable the eslint rule vars-on-top. Move
the declarations to where they are defined.

Also, in mw.jqueryMsg.HtmlEmitter.emit replace a temporary
return variable with direct early returns.

Should be a no-op in terms of functionality.

Change-Id: I8c036c5305a99b93140a8d02faafa7bed928c0b6

1 files changed, 32 insertions, 46 deletions

diff --git a/resources/src/mediawiki.jqueryMsg/mediawiki.jqueryMsg.js b/resources/src/mediawiki.jqueryMsg/mediawiki.jqueryMsg.js
index 7e590ae3971b..861ff26e0ffd 100644
--- a/resources/src/mediawiki.jqueryMsg/mediawiki.jqueryMsg.js
+++ b/resources/src/mediawiki.jqueryMsg/mediawiki.jqueryMsg.js
@@ -11,9 +11,7 @@
  * @singleton
  */
 
-var oldParser,
-	strongDirRegExp,
-	slice = Array.prototype.slice,
+var slice = Array.prototype.slice,
 	charAt = require( 'mediawiki.String' ).charAt,
 	parserDefaults = {
 		// Magic words and their expansions. Server-side data is added to this below.
@@ -140,14 +138,13 @@ function textify( input ) {
  */
 function getFailableParserFn( options ) {
 	return function ( args ) {
-		var fallback,
-			parser = new mw.jqueryMsg.Parser( options ),
+		var parser = new mw.jqueryMsg.Parser( options ),
 			key = args[ 0 ],
 			argsArray = Array.isArray( args[ 1 ] ) ? args[ 1 ] : slice.call( args, 1 );
 		try {
 			return parser.parse( key, argsArray );
 		} catch ( e ) {
-			fallback = parser.settings.messages.get( key );
+			var fallback = parser.settings.messages.get( key );
 			mw.log.warn( 'mediawiki.jqueryMsg: ' + key + ': ' + e.message );
 			mw.track( 'mediawiki.jqueryMsg.error', {
 				messageKey: key,
@@ -218,11 +215,10 @@ mw.jqueryMsg.getMessageFunction = function ( options ) {
 	}
 
 	return function () {
-		var failableResult;
 		if ( !failableParserFn ) {
 			failableParserFn = getFailableParserFn( options );
 		}
-		failableResult = failableParserFn( arguments );
+		var failableResult = failableParserFn( arguments );
 		if ( format === 'text' || format === 'escaped' ) {
 			return failableResult.text();
 		} else {
@@ -257,11 +253,10 @@ mw.jqueryMsg.getPlugin = function ( options ) {
 	var failableParserFn;
 
 	return function () {
-		var $target;
 		if ( !failableParserFn ) {
 			failableParserFn = getFailableParserFn( options );
 		}
-		$target = this.empty();
+		var $target = this.empty();
 		appendWithoutParsing( $target, failableParserFn( arguments ) );
 		return $target;
 	};
@@ -310,10 +305,8 @@ mw.jqueryMsg.Parser.prototype = {
 	 * @return {string|Array} string of '⧼key⧽' if message missing, simple string if possible, array of arrays if needs parsing
 	 */
 	getAst: function ( key, replacements ) {
-		var wikiText;
-
 		if ( !Object.prototype.hasOwnProperty.call( this.astCache, key ) ) {
-			wikiText = this.settings.messages.get( key );
+			var wikiText = this.settings.messages.get( key );
 			if (
 				mw.config.get( 'wgUserLanguage' ) === 'qqx' &&
 				wikiText === '(' + key + ')'
@@ -733,17 +726,16 @@ mw.jqueryMsg.Parser.prototype = {
 		 * @return {boolean} true if this is HTML is allowed, false otherwise
 		 */
 		function isAllowedHtml( startTagName, endTagName, attributes ) {
-			var i, len, attributeName, badStyle;
-
 			startTagName = startTagName.toLowerCase();
 			endTagName = endTagName.toLowerCase();
 			if ( startTagName !== endTagName || settings.allowedHtmlElements.indexOf( startTagName ) === -1 ) {
 				return false;
 			}
 
-			badStyle = /[\000-\010\013\016-\037\177]|expression|filter\s*:|accelerator\s*:|-o-link\s*:|-o-link-source\s*:|-o-replace\s*:|url\s*\(|image\s*\(|image-set\s*\(/i;
+			var badStyle = /[\000-\010\013\016-\037\177]|expression|filter\s*:|accelerator\s*:|-o-link\s*:|-o-link-source\s*:|-o-replace\s*:|url\s*\(|image\s*\(|image-set\s*\(/i;
 
-			for ( i = 0, len = attributes.length; i < len; i += 2 ) {
+			var attributeName;
+			for ( var i = 0, len = attributes.length; i < len; i += 2 ) {
 				attributeName = attributes[ i ];
 				if ( settings.allowedHtmlCommonAttributes.indexOf( attributeName ) === -1 &&
 					( settings.allowedHtmlAttributesByElement[ startTagName ] || [] ).indexOf( attributeName ) === -1 ) {
@@ -940,36 +932,34 @@ mw.jqueryMsg.HtmlEmitter = function ( language, magic ) {
 	 * @return {Mixed} single-string node or array of nodes suitable for jQuery appending
 	 */
 	this.emit = function ( node, replacements ) {
-		var ret, subnodes, operation;
 		switch ( typeof node ) {
 			case 'string':
 			case 'number':
-				ret = node;
-				break;
+				return node;
+
 			// typeof returns object for arrays
 			case 'object':
 				// node is an array of nodes
 				// eslint-disable-next-line no-jquery/no-map-util
-				subnodes = $.map( node.slice( 1 ), function ( n ) {
+				var subnodes = $.map( node.slice( 1 ), function ( n ) {
 					return jmsg.emit( n, replacements );
 				} );
-				operation = node[ 0 ].toLowerCase();
+				var operation = node[ 0 ].toLowerCase();
 				if ( typeof jmsg[ operation ] === 'function' ) {
-					ret = jmsg[ operation ]( subnodes, replacements );
+					return jmsg[ 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;
+				return '';
+
 			default:
 				throw new Error( 'Unexpected type in AST: ' + typeof node );
 		}
-		return ret;
 	};
 };
 
@@ -983,7 +973,7 @@ mw.jqueryMsg.HtmlEmitter = function ( language, magic ) {
 // Generated by UnicodeJS (see tools/strongDir) from the UCD; see
 // https://phabricator.wikimedia.org/source/unicodejs/ .
 // eslint-disable-next-line no-misleading-character-class
-strongDirRegExp = new RegExp(
+var strongDirRegExp = new RegExp(
 	'(?:' +
 		'(' +
 			'[\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-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312d\u3131-\u318e\u3190-\u31ba\u31f0-\u321c\u3220-\u324f\u3260-\u327b\u327f-\u32b0\u32c0-\u32cb\u32d0-\u32fe\u3300-\u3376\u337b-\u33dd\u33e0-\u33fe\u3400-\u4db5\u4e00-\u9fd5\ua000-\ua48c\ua4d0-\ua60c\ua610-\ua62b\ua640-\ua66e\ua680-\ua69d\ua6a0-\ua6ef\ua6f2-\ua6f7\ua722-\ua787\ua789-\ua7ad\ua7b0-\ua7b7\ua7f7-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua824\ua827\ua830-\ua837\ua840-\ua873\ua880-\ua8c3\ua8ce-\ua8d9\ua8f2-\ua8fd\ua900-\ua925\ua92e-\ua946\ua952\ua953\ua95f-\ua97c\ua983-\ua9b2\ua9b4\ua9b5\ua9ba\ua9bb\ua9bd-\ua9cd\ua9cf-\ua9d9\ua9de-\ua9e4\ua9e6-\ua9fe\uaa00-\uaa28\uaa2f\uaa30\uaa33\uaa34\uaa40-\uaa42\uaa44-\uaa4b\uaa4d\uaa50-\uaa59\uaa5c-\uaa7b\uaa7d-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaaeb\uaaee-\uaaf5\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uab30-\uab65\uab70-\uabe4\uabe6\uabe7\uabe9-\uabec\uabf0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+
@@ -1114,16 +1104,15 @@ mw.jqueryMsg.HtmlEmitter.prototype = {
 	 * @return {jQuery}
 	 */
 	wikilink: function ( nodes ) {
-		var page, anchor, url, $el;
-
-		page = textify( nodes[ 0 ] );
+		var page = textify( nodes[ 0 ] );
 		// Strip leading ':', which is used to suppress special behavior in wikitext links,
 		// e.g. [[:Category:Foo]] or [[:File:Foo.jpg]]
 		if ( page.charAt( 0 ) === ':' ) {
 			page = page.slice( 1 );
 		}
-		url = mw.util.getUrl( page );
+		var url = mw.util.getUrl( page );
 
+		var anchor;
 		if ( nodes.length === 1 ) {
 			// [[Some Page]] or [[Namespace:Some Page]]
 			anchor = page;
@@ -1132,7 +1121,7 @@ mw.jqueryMsg.HtmlEmitter.prototype = {
 			anchor = nodes[ 1 ];
 		}
 
-		$el = $( '<a>' ).attr( {
+		var $el = $( '<a>' ).attr( {
 			title: page,
 			href: url
 		} );
@@ -1161,12 +1150,10 @@ mw.jqueryMsg.HtmlEmitter.prototype = {
 	 * @return {jQuery}
 	 */
 	htmlelement: function ( nodes ) {
-		var tagName, attributes, contents, $element;
-
-		tagName = nodes.shift();
-		attributes = nodes.shift();
-		contents = nodes;
-		$element = $( document.createElement( tagName ) ).attr( attributes );
+		var tagName = nodes.shift();
+		var attributes = nodes.shift();
+		var contents = nodes;
+		var $element = $( document.createElement( tagName ) ).attr( attributes );
 		return appendWithoutParsing( $element, contents );
 	},
 
@@ -1186,8 +1173,7 @@ mw.jqueryMsg.HtmlEmitter.prototype = {
 	extlink: function ( nodes ) {
 		var $el,
 			arg = nodes[ 0 ],
-			contents = nodes[ 1 ],
-			target;
+			contents = nodes[ 1 ];
 		if ( arg instanceof $ && !arg.hasClass( 'mediaWiki_htmlEmitter' ) ) {
 			$el = arg;
 		} else {
@@ -1205,7 +1191,7 @@ mw.jqueryMsg.HtmlEmitter.prototype = {
 					}
 				} );
 			} else {
-				target = textify( arg );
+				var target = textify( arg );
 				if ( target.search( new RegExp( '^(/|' + mw.config.get( 'wgUrlProtocols' ) + ')' ) ) !== -1 ) {
 					$el.attr( 'href', target );
 					if ( target.search( '^' + mw.config.get( 'wgArticlePath' ).replace( /\$1/g, '.+?' ) + '$' ) === -1 ) {
@@ -1232,11 +1218,11 @@ mw.jqueryMsg.HtmlEmitter.prototype = {
 	 * @return {string|jQuery} selected pluralized form according to current language
 	 */
 	plural: function ( nodes ) {
-		var forms, firstChild, firstChildText, explicitPluralFormNumber, formIndex, form, count,
+		var firstChild, firstChildText, explicitPluralFormNumber, formIndex, form,
 			explicitPluralForms = {};
 
-		count = parseFloat( this.language.convertNumber( textify( nodes[ 0 ] ), true ) );
-		forms = nodes.slice( 1 );
+		var count = parseFloat( this.language.convertNumber( textify( nodes[ 0 ] ), true ) );
+		var forms = nodes.slice( 1 );
 		for ( formIndex = 0; formIndex < forms.length; formIndex++ ) {
 			form = forms[ formIndex ];
 
@@ -1458,7 +1444,7 @@ mw.jqueryMsg.HtmlEmitter.prototype = {
 $.fn.msg = mw.jqueryMsg.getPlugin();
 
 // Replace the default message parser with jqueryMsg
-oldParser = mw.Message.prototype.parser;
+var oldParser = mw.Message.prototype.parser;
 mw.Message.prototype.parser = function () {
 	// Fall back to mw.msg's simple parser where possible
 	if (