function parseFileSyntax ( wikitext ) {
	var	escapedPipe = '\u0001',
		result = {},
		magicWords = mw.config.get( 'wgWikiEditorMagicWords' ),
		match, params, file, i, param;
	if ( wikitext.indexOf( escapedPipe ) !== -1 ) {
		return false;
	}
	match = /^(\s*)\[\[(.*)\]\](\s*)$/.exec( wikitext );
	if ( !match ) {
		return false;
	}
	result.pre = match[1];
	result.post = match[3];
	/* escape pipes inside links and templates,
	then split the parameters at the remaining pipes */
	params = match[2].replace( /\[\[[^\[\]]*\]\]|\{\{[^\{\}]\}\}/g, function ( link ) {
		return link.replace( /\|/g, escapedPipe );
	} ).split( '|' );
	file = new mw.Title( params[0] );
	if ( file.getNamespaceId() !== 6 ) {
		return false;
	}
	result.fileName = file.getMainText();
	for ( i = 1; i < params.length; i++ ) {
		param = params[i];
		if ( param === 'right' || param === magicWords.img_right ) {
			result.fileFloat = 'right';
		} else if ( param === 'left' || param === magicWords.img_left ) {
			result.fileFloat = 'left';
		} else if ( param === 'none' || param === magicWords.img_none ) {
			result.fileFloat = 'none';
		} else if ( param === 'center' || param === 'centre' || param === magicWords.img_center ) {
			result.fileFloat = 'center';
		} else if ( param === 'thumbnail' || param === 'thumb' || param === magicWords.img_thumbnail ) {
			result.fileFormat = 'thumbnail';
		} else if ( param === 'framed' || param === 'enframed' || param === 'frame' || param === magicWords.img_framed ) {
			result.fileFormat = 'framed';
		} else if ( param === 'frameless' || param === magicWords.img_frameless ) {
			result.fileFormat = 'frameless';
		} else if ( /.+px$/.test( param ) ) {
			result.fileSize = param.replace( /px$/, '' );
		} else if ( param === '' ) { //empty, ignore it
		} else if ( i === params.length - 1 ) { //last param -> caption
			result.caption = param.replace( new RegExp ( $.escapeRE( escapedPipe ), 'g' ), '|' );
		} else { //unknown param
			return false;
		}
	}
	return result;
}