ace-pegs.js

define( 'ace/mode/pegjs', [

    'ace/lib/oop',
    'ace/mode/text_highlight_rules',
    'ace/mode/javascript_highlight_rules'

], function ( oop, textHighlightRules, javascriptHighlightRules ) {

    'use strict';

    var TextHighlightRules = textHighlightRules.TextHighlightRules;
    var JavaScriptHighlightRules = javascriptHighlightRules.JavaScriptHighlightRules;

    var pegjsHighlightRules = function ( ) {

        this.$rules = {

            'start' : [ {
                token : 'constant.language',
                regex : '[a-z][a-zA-Z]+'
            }, {
                token : 'keyword.operator',
                regex : '[=/]',
                next  : 'peg-rule'
            } ],

            'peg-rule' : [ {
                token : 'string',
                regex : '["](?:(?:\\\\.)|(?:[^"\\\\]))*?["]'
            }, {
                token : 'string',
                regex : "['](?:(?:\\\\.)|(?:[^'\\\\]))*?[']"
            }, {
                token : 'keyword.operator',
                regex : '^\\S*(?=[=/{(]|$)',
                next  : 'wait'
            }, {
                token : 'variable',
                regex : '[a-z][a-zA-Z]+:'
            }, {
                token : 'identifier',
                regex : '[a-z][a-zA-Z]+'
            }, {
                token : 'string',
                regex : '\\[(?:(?:\\\\.)|(?:[^\\]\\\\]))*?\\]'
            }, {
                token : 'keyword.operator',
                regex : '[+?*()/]'
            }, {
                token : 'keyword.operator',
                regex : '{',
                next  : 'js-start'
            } ]

        };

        for ( var i in this.$rules ) {
            this.$rules[ i ].unshift( {
                token : 'comment',
                regex : '/\\*',
                next  : 'comment'
            } );
        }

        this.$rules.comment = [ {
            token : 'comment',
            regex : '\\*/',
            next  : 'start'
        }, {
            token : 'comment',
            regex : '.'
        } ];

        this.embedRules( JavaScriptHighlightRules, 'js-', [
            { token : 'keyword', regex : '}', next : 'start' }
        ] );

    };

    oop.inherits( pegjsHighlightRules, TextHighlightRules );
    return { pegjsHighlightRules : pegjsHighlightRules };

} );