SGH / COMPONENTS

  /* TODO
  	Handle multiline code after tag
  	    %foo= some |
  			multiline |
  			code |
  */
  
  (function(Prism) {
  
  	Prism.languages.haml = {
  		// Multiline stuff should appear before the rest
  

  		'multiline-comment': {
  			pattern: /((?:^|\r?\n|\r)([\t ]*))(?:\/|-#).*((?:\r?\n|\r)\2[\t ]+.+)*/,
  			lookbehind: true,
  			alias: 'comment'
  		},

  
  		'multiline-code': [
  			{

  				pattern: /((?:^|\r?\n|\r)([\t ]*)(?:[~-]|[&!]?=)).*,[\t ]*((?:\r?\n|\r)\2[\t ]+.*,[\t ]*)*((?:\r?\n|\r)\2[\t ]+.+)/,

  				lookbehind: true,
  				inside: {
  					rest: Prism.languages.ruby
  				}
  			},
  			{

  				pattern: /((?:^|\r?\n|\r)([\t ]*)(?:[~-]|[&!]?=)).*\|[\t ]*((?:\r?\n|\r)\2[\t ]+.*\|[\t ]*)*/,

  				lookbehind: true,
  				inside: {
  					rest: Prism.languages.ruby
  				}
  			}
  		],
  
  		// See at the end of the file for known filters
  		'filter': {

  			pattern: /((?:^|\r?\n|\r)([\t ]*)):[\w-]+((?:\r?\n|\r)(?:\2[\t ]+.+|\s*?(?=\r?\n|\r)))+/,

  			lookbehind: true,
  			inside: {
  				'filter-name': {
  					pattern: /^:[\w-]+/,
  					alias: 'variable'
  				}
  			}
  		},
  
  		'markup': {

  			pattern: /((?:^|\r?\n|\r)[\t ]*)<.+/,

  			lookbehind: true,
  			inside: {
  				rest: Prism.languages.markup
  			}
  		},
  		'doctype': {

  			pattern: /((?:^|\r?\n|\r)[\t ]*)!!!(?: .+)?/,

  			lookbehind: true
  		},
  		'tag': {
  			// Allows for one nested group of braces

  			pattern: /((?:^|\r?\n|\r)[\t ]*)[%.#][\w\-#.]*[\w\-](?:\([^)]+\)|\{(?:\{[^}]+\}|[^}])+\}|\[[^\]]+\])*[\/<>]*/,

  			lookbehind: true,
  			inside: {
  				'attributes': [
  					{
  						// Lookbehind tries to prevent interpolations for breaking it all
  						// Allows for one nested group of braces
  						pattern: /(^|[^#])\{(?:\{[^}]+\}|[^}])+\}/,
  						lookbehind: true,
  						inside: {
  							rest: Prism.languages.ruby
  						}
  					},
  					{
  						pattern: /\([^)]+\)/,
  						inside: {
  							'attr-value': {
  								pattern: /(=\s*)(?:"(?:\\?.)*?"|[^)\s]+)/,
  								lookbehind: true
  							},
  							'attr-name': /[\w:-]+(?=\s*!?=|\s*[,)])/,
  							'punctuation': /[=(),]/
  						}
  					},
  					{
  						pattern: /\[[^\]]+\]/,
  						inside: {
  							rest: Prism.languages.ruby
  						}
  					}
  				],
  				'punctuation': /[<>]/
  			}
  		},
  		'code': {

  			pattern: /((?:^|\r?\n|\r)[\t ]*(?:[~-]|[&!]?=)).+/,

  			lookbehind: true,
  			inside: {
  				rest: Prism.languages.ruby
  			}
  		},
  		// Interpolations in plain text
  		'interpolation': {
  			pattern: /#\{[^}]+\}/,
  			inside: {
  				'delimiter': {
  					pattern: /^#\{|\}$/,
  					alias: 'punctuation'
  				},
  				rest: Prism.languages.ruby
  			}
  		},
  		'punctuation': {

  			pattern: /((?:^|\r?\n|\r)[\t ]*)[~=\-&!]+/,

  			lookbehind: true
  		}
  	};
  

  	var filter_pattern = '((?:^|\\r?\\n|\\r)([\\t ]*)):{{filter_name}}((?:\\r?\\n|\\r)(?:\\2[\\t ]+.+|\\s*?(?=\\r?\\n|\\r)))+';

  
  	// Non exhaustive list of available filters and associated languages
  	var filters = [
  		'css',
  		{filter:'coffee',language:'coffeescript'},
  		'erb',
  		'javascript',
  		'less',
  		'markdown',
  		'ruby',
  		'scss',
  		'textile'
  	];
  	var all_filters = {};
  	for (var i = 0, l = filters.length; i < l; i++) {
  		var filter = filters[i];
  		filter = typeof filter === 'string' ? {filter: filter, language: filter} : filter;
  		if (Prism.languages[filter.language]) {
  			all_filters['filter-' + filter.filter] = {
  				pattern: RegExp(filter_pattern.replace('{{filter_name}}', filter.filter)),
  				lookbehind: true,
  				inside: {
  					'filter-name': {
  						pattern: /^:[\w-]+/,
  						alias: 'variable'
  					},
  					rest: Prism.languages[filter.language]
  				}
  			}
  		}
  	}
  
  	Prism.languages.insertBefore('haml', 'filter', all_filters);
  
  }(Prism));