/*!
 * VisualEditor MediaWiki utilities.
 *
 * @copyright 2011-2017 VisualEditor Team and others; see http://ve.mit-license.org
 */

/**
 * @class ve
 */

/**
 * Decode a URI component into a mediawiki article title
 *
 * N.B. Illegal article titles can result from fairly reasonable input (e.g. "100%25beef");
 * see https://phabricator.wikimedia.org/T137847 .
 *
 * @param {string} s String to decode
 * @param {boolean} [preserveUnderscores] Don't convert underscores to spaces
 * @return {string} Decoded string, or original string if decodeURIComponent failed
 */
ve.decodeURIComponentIntoArticleTitle = function ( s, preserveUnderscores ) {
	try {
		s = decodeURIComponent( s );
	} catch ( e ) {
		return s;
	}
	if ( preserveUnderscores ) {
		return s;
	}
	return s.replace( /_/g, ' ' );
};

/**
 * Unwrap Parsoid sections
 *
 * @param {HTMLElement} element Parent element, e.g. document body
 */
ve.unwrapParsoidSections = function ( element ) {
	Array.prototype.forEach.call( element.querySelectorAll( 'section[data-mw-section-id]' ), function ( section ) {
		var parent = section.parentNode;
		while ( section.firstChild ) {
			parent.insertBefore( section.firstChild, section );
		}
		parent.removeChild( section );
	} );
};

/**
 * Strip legacy (non-HTML5) IDs; typically found as section IDs inside
 * headings.
 *
 * @param {HTMLElement} element Parent element, e.g. document body
 */
ve.stripParsoidFallbackIds = function ( element ) {
	Array.prototype.forEach.call( element.querySelectorAll( 'span[typeof="mw:FallbackId"][id]:empty' ), function ( legacySpan ) {
		legacySpan.parentNode.removeChild( legacySpan );
	} );
};