(function(){

if (
	typeof self !== 'undefined' && !self.Prism ||
	typeof global !== 'undefined' && !global.Prism
) {
	return;
}

if (Prism.languages.css) {
	// check whether the selector is an advanced pattern before extending it
	if (Prism.languages.css.selector.pattern)
	{
		Prism.languages.css.selector.inside['pseudo-class'] = /:[\w-]+/;
		Prism.languages.css.selector.inside['pseudo-element'] = /::[\w-]+/;
	}
	else
	{
		Prism.languages.css.selector = {
			pattern: Prism.languages.css.selector,
			inside: {
				'pseudo-class': /:[\w-]+/,
				'pseudo-element': /::[\w-]+/
			}
		};
	}
}

if (Prism.languages.markup) {
	Prism.languages.markup.tag.inside.tag.inside['tag-id'] = /[\w-]+/;
	
	var Tags = {
		HTML: {
			'a': 1, 'abbr': 1, 'acronym': 1, 'b': 1, 'basefont': 1, 'bdo': 1, 'big': 1, 'blink': 1, 'cite': 1, 'code': 1, 'dfn': 1, 'em': 1, 'kbd': 1,  'i': 1, 
			'rp': 1, 'rt': 1, 'ruby': 1, 's': 1, 'samp': 1, 'small': 1, 'spacer': 1, 'strike': 1, 'strong': 1, 'sub': 1, 'sup': 1, 'time': 1, 'tt': 1,  'u': 1, 
			'var': 1, 'wbr': 1, 'noframes': 1, 'summary': 1, 'command': 1, 'dt': 1, 'dd': 1, 'figure': 1, 'figcaption': 1, 'center': 1, 'section': 1, 'nav': 1,
			'article': 1, 'aside': 1, 'hgroup': 1, 'header': 1, 'footer': 1, 'address': 1, 'noscript': 1, 'isIndex': 1, 'main': 1, 'mark': 1, 'marquee': 1,
			'meter': 1, 'menu': 1
		},
		SVG: {
			'animateColor': 1, 'animateMotion': 1, 'animateTransform': 1, 'glyph': 1, 'feBlend': 1, 'feColorMatrix': 1, 'feComponentTransfer': 1, 
			'feFuncR': 1, 'feFuncG': 1, 'feFuncB': 1, 'feFuncA': 1, 'feComposite': 1, 'feConvolveMatrix': 1, 'feDiffuseLighting': 1, 'feDisplacementMap': 1, 
			'feFlood': 1, 'feGaussianBlur': 1, 'feImage': 1, 'feMerge': 1, 'feMergeNode': 1, 'feMorphology': 1, 'feOffset': 1, 'feSpecularLighting': 1, 
			'feTile': 1, 'feTurbulence': 1, 'feDistantLight': 1, 'fePointLight': 1, 'feSpotLight': 1, 'linearGradient': 1, 'radialGradient': 1, 'altGlyph': 1, 
			'textPath': 1, 'tref': 1, 'altglyph': 1, 'textpath': 1, 'altglyphdef': 1, 'altglyphitem': 1, 'clipPath': 1, 'color-profile': 1, 'cursor': 1,
			'font-face': 1, 'font-face-format': 1, 'font-face-name': 1, 'font-face-src': 1, 'font-face-uri': 1, 'foreignObject': 1, 'glyphRef': 1,
			'hkern': 1, 'vkern': 1
		},
		MathML: {}
	}
}

var language;

Prism.hooks.add('wrap', function(env) {
	if ((env.type == 'tag-id'
		|| (env.type == 'property' && env.content.indexOf('-') != 0)
		|| (env.type == 'rule'&& env.content.indexOf('@-') != 0)
		|| (env.type == 'pseudo-class'&& env.content.indexOf(':-') != 0) 
		|| (env.type == 'pseudo-element'&& env.content.indexOf('::-') != 0) 
        || (env.type == 'attr-name' && env.content.indexOf('data-') != 0)
		) && env.content.indexOf('<') === -1
	) {
		if (env.language == 'css'
			|| env.language == 'scss'
			|| env.language == 'markup'
		) {
			var href = 'https://webplatform.github.io/docs/';
			var content = env.content;

			if (env.language == 'css' || env.language == 'scss') {
				href += 'css/';

				if (env.type == 'property') {
					href += 'properties/';
				}
				else if (env.type == 'rule') {
					href += 'atrules/';
					content = content.substring(1);
				}
				else if (env.type == 'pseudo-class') {
					href += 'selectors/pseudo-classes/';
					content = content.substring(1);
				}
				else if (env.type == 'pseudo-element') {
					href += 'selectors/pseudo-elements/';
					content = content.substring(2);
				}
			}
			else if (env.language == 'markup') {
				if (env.type == 'tag-id') {
					// Check language
					language = getLanguage(env.content) || language;

					if (language) {
						href += language + '/elements/';
					}
					else {
						return; // Abort
					}
				}
				else if (env.type == 'attr-name') {
					if (language) {
						href += language + '/attributes/';
					}
					else {
						return; // Abort
					}
				}
			}

			href += content;
			env.tag = 'a';
			env.attributes.href = href;
			env.attributes.target = '_blank';
		}
	}
});

function getLanguage(tag) {
	var tagL = tag.toLowerCase();
	
	if (Tags.HTML[tagL]) {
		return 'html';
	}
	else if (Tags.SVG[tag]) {
		return 'svg';
	}
	else if (Tags.MathML[tag]) {
		return 'mathml';
	}
	
	// Not in dictionary, perform check
	if (Tags.HTML[tagL] !== 0 && typeof document !== 'undefined') {
		var htmlInterface = (document.createElement(tag).toString().match(/\[object HTML(.+)Element\]/) || [])[1];
		
		if (htmlInterface && htmlInterface != 'Unknown') {
			Tags.HTML[tagL] = 1;
			return 'html';
		}
	}
	
	Tags.HTML[tagL] = 0;
	
	if (Tags.SVG[tag] !== 0 && typeof document !== 'undefined') {
		var svgInterface = (document.createElementNS('http://www.w3.org/2000/svg', tag).toString().match(/\[object SVG(.+)Element\]/) || [])[1];
		
		if (svgInterface && svgInterface != 'Unknown') {
			Tags.SVG[tag] = 1;
			return 'svg';
		}
	}
	
	Tags.SVG[tag] = 0;
	
	// Lame way to detect MathML, but browsers don’t expose interface names there :(
	if (Tags.MathML[tag] !== 0) {
		if (tag.indexOf('m') === 0) {
			Tags.MathML[tag] = 1;
			return 'mathml';
		}
	}
	
	Tags.MathML[tag] = 0;
	
	return null;
}

})();