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 * Distributed under the BSD license:
 *
 * Copyright (c) 2010, Ajax.org B.V.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of Ajax.org B.V. nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL AJAX.ORG B.V. BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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define(function (require, exports, module) {
    "use strict";

    var oop = require("../lib/oop");
    var TextHighlightRules = require("./text_highlight_rules").TextHighlightRules;

// exports is for Haml
    var constantOtherSymbol = exports.constantOtherSymbol = {
        token: "constant.other.symbol.ruby", // symbol
        regex: "[:](?:[A-Za-z_]|[@$](?=[a-zA-Z0-9_]))[a-zA-Z0-9_]*[!=?]?"
    };

    var qString = exports.qString = {
        token: "string", // single line
        regex: "['](?:(?:\\\\.)|(?:[^'\\\\]))*?[']"
    };

    var qqString = exports.qqString = {
        token: "string", // single line
        regex: '["](?:(?:\\\\.)|(?:[^"\\\\]))*?["]'
    };

    var tString = exports.tString = {
        token: "string", // backtick string
        regex: "[`](?:(?:\\\\.)|(?:[^'\\\\]))*?[`]"
    };

    var constantNumericHex = exports.constantNumericHex = {
        token: "constant.numeric", // hex
        regex: "0[xX][0-9a-fA-F](?:[0-9a-fA-F]|_(?=[0-9a-fA-F]))*\\b"
    };

    var constantNumericFloat = exports.constantNumericFloat = {
        token: "constant.numeric", // float
        regex: "[+-]?\\d(?:\\d|_(?=\\d))*(?:(?:\\.\\d(?:\\d|_(?=\\d))*)?(?:[eE][+-]?\\d+)?)?\\b"
    };

    var RubyHighlightRules = function () {

        var builtinFunctions = (
            "abort|Array|assert|assert_equal|assert_not_equal|assert_same|assert_not_same|" +
            "assert_nil|assert_not_nil|assert_match|assert_no_match|assert_in_delta|assert_throws|" +
            "assert_raise|assert_nothing_raised|assert_instance_of|assert_kind_of|assert_respond_to|" +
            "assert_operator|assert_send|assert_difference|assert_no_difference|assert_recognizes|" +
            "assert_generates|assert_response|assert_redirected_to|assert_template|assert_select|" +
            "assert_select_email|assert_select_rjs|assert_select_encoded|css_select|at_exit|" +
            "attr|attr_writer|attr_reader|attr_accessor|attr_accessible|autoload|binding|block_given?|callcc|" +
            "caller|catch|chomp|chomp!|chop|chop!|defined?|delete_via_redirect|eval|exec|exit|" +
            "exit!|fail|Float|flunk|follow_redirect!|fork|form_for|form_tag|format|gets|global_variables|gsub|" +
            "gsub!|get_via_redirect|host!|https?|https!|include|Integer|lambda|link_to|" +
            "link_to_unless_current|link_to_function|link_to_remote|load|local_variables|loop|open|open_session|" +
            "p|print|printf|proc|putc|puts|post_via_redirect|put_via_redirect|raise|rand|" +
            "raw|readline|readlines|redirect?|request_via_redirect|require|scan|select|" +
            "set_trace_func|sleep|split|sprintf|srand|String|stylesheet_link_tag|syscall|system|sub|sub!|test|" +
            "throw|trace_var|trap|untrace_var|atan2|cos|exp|frexp|ldexp|log|log10|sin|sqrt|tan|" +
            "render|javascript_include_tag|csrf_meta_tag|label_tag|text_field_tag|submit_tag|check_box_tag|" +
            "content_tag|radio_button_tag|text_area_tag|password_field_tag|hidden_field_tag|" +
            "fields_for|select_tag|options_for_select|options_from_collection_for_select|collection_select|" +
            "time_zone_select|select_date|select_time|select_datetime|date_select|time_select|datetime_select|" +
            "select_year|select_month|select_day|select_hour|select_minute|select_second|file_field_tag|" +
            "file_field|respond_to|skip_before_filter|around_filter|after_filter|verify|" +
            "protect_from_forgery|rescue_from|helper_method|redirect_to|before_filter|" +
            "send_data|send_file|validates_presence_of|validates_uniqueness_of|validates_length_of|" +
            "validates_format_of|validates_acceptance_of|validates_associated|validates_exclusion_of|" +
            "filter_parameter_logging|match|get|post|resources|redirect|scope|assert_routing|" +
            "translate|localize|extract_locale_from_tld|caches_page|expire_page|caches_action|expire_action|" +
            "cache|expire_fragment|expire_cache_for|observe|cache_sweeper|" +
            "has_many|has_one|belongs_to|has_and_belongs_to_many"
        );

        var keywords = (
            "alias|and|BEGIN|begin|break|case|class|def|defined|do|else|elsif|END|end|ensure|" +
            "__FILE__|finally|for|gem|if|in|__LINE__|module|next|not|or|private|protected|public|" +
            "redo|rescue|retry|return|super|then|undef|unless|until|when|while|yield"
        );

        var buildinConstants = (
            "true|TRUE|false|FALSE|nil|NIL|ARGF|ARGV|DATA|ENV|RUBY_PLATFORM|RUBY_RELEASE_DATE|" +
            "RUBY_VERSION|STDERR|STDIN|STDOUT|TOPLEVEL_BINDING"
        );

        var builtinVariables = (
            "$DEBUG|$defout|$FILENAME|$LOAD_PATH|$SAFE|$stdin|$stdout|$stderr|$VERBOSE|" +
            "$!|root_url|flash|session|cookies|params|request|response|logger|self"
        );

        var keywordMapper = this.$keywords = this.createKeywordMapper({
            "keyword": keywords,
            "constant.language": buildinConstants,
            "variable.language": builtinVariables,
            "support.function": builtinFunctions,
            "invalid.deprecated": "debugger" // TODO is this a remnant from js mode?
        }, "identifier");

        // regexp must not have capturing parentheses. Use (?:) instead.
        // regexps are ordered -> the first match is used

        this.$rules = {
            "start": [
                {
                    token: "comment",
                    regex: "#.*$"
                }, {
                    token: "comment", // multi line comment
                    regex: "^=begin(?:$|\\s.*$)",
                    next: "comment"
                }, {
                    token: "string.regexp",
                    regex: "[/](?:(?:\\[(?:\\\\]|[^\\]])+\\])|(?:\\\\/|[^\\]/]))*[/]\\w*\\s*(?=[).,;]|$)"
                },

                [{
                    regex: "[{}]", onMatch: function (val, state, stack) {
                        this.next = val == "{" ? this.nextState : "";
                        if (val == "{" && stack.length) {
                            stack.unshift("start", state);
                            return "paren.lparen";
                        }
                        if (val == "}" && stack.length) {
                            stack.shift();
                            this.next = stack.shift();
                            if (this.next.indexOf("string") != -1)
                                return "paren.end";
                        }
                        return val == "{" ? "paren.lparen" : "paren.rparen";
                    },
                    nextState: "start"
                }, {
                    token: "string.start",
                    regex: /"/,
                    push: [{
                        token: "constant.language.escape",
                        regex: /\\(?:[nsrtvfbae'"\\]|c.|C-.|M-.(?:\\C-.)?|[0-7]{3}|x[\da-fA-F]{2}|u[\da-fA-F]{4})/
                    }, {
                        token: "paren.start",
                        regex: /#{/,
                        push: "start"
                    }, {
                        token: "string.end",
                        regex: /"/,
                        next: "pop"
                    }, {
                        defaultToken: "string"
                    }]
                }, {
                    token: "string.start",
                    regex: /`/,
                    push: [{
                        token: "constant.language.escape",
                        regex: /\\(?:[nsrtvfbae'"\\]|c.|C-.|M-.(?:\\C-.)?|[0-7]{3}|x[\da-fA-F]{2}|u[\da-fA-F]{4})/
                    }, {
                        token: "paren.start",
                        regex: /#{/,
                        push: "start"
                    }, {
                        token: "string.end",
                        regex: /`/,
                        next: "pop"
                    }, {
                        defaultToken: "string"
                    }]
                }, {
                    token: "string.start",
                    regex: /'/,
                    push: [{
                        token: "constant.language.escape",
                        regex: /\\['\\]/
                    }, {
                        token: "string.end",
                        regex: /'/,
                        next: "pop"
                    }, {
                        defaultToken: "string"
                    }]
                }],
                // TODO: add support for %[QqxWwrs][{[(]

                {
                    token: "text", // namespaces aren't symbols
                    regex: "::"
                }, {
                    token: "variable.instance", // instance variable
                    regex: "@{1,2}[a-zA-Z_\\d]+"
                }, {
                    token: "support.class", // class name
                    regex: "[A-Z][a-zA-Z_\\d]+"
                },

                constantOtherSymbol,
                constantNumericHex,
                constantNumericFloat,

                {
                    token: "constant.language.boolean",
                    regex: "(?:true|false)\\b"
                }, {
                    token: keywordMapper,
                    // TODO: Unicode escape sequences
                    // TODO: Unicode identifiers
                    regex: "[a-zA-Z_$][a-zA-Z0-9_$]*\\b"
                }, {
                    token: "punctuation.separator.key-value",
                    regex: "=>"
                }, {
                    stateName: "heredoc",
                    onMatch: function (value, currentState, stack) {
                        var next = value[2] == '-' ? "indentedHeredoc" : "heredoc";
                        var tokens = value.split(this.splitRegex);
                        stack.push(next, tokens[3]);
                        return [
                            {type: "constant", value: tokens[1]},
                            {type: "string", value: tokens[2]},
                            {type: "support.class", value: tokens[3]},
                            {type: "string", value: tokens[4]}
                        ];
                    },
                    regex: "(<<-?)(['\"`]?)([\\w]+)(['\"`]?)",
                    rules: {
                        heredoc: [{
                            onMatch: function (value, currentState, stack) {
                                if (value === stack[1]) {
                                    stack.shift();
                                    stack.shift();
                                    this.next = stack[0] || "start";
                                    return "support.class";
                                }
                                this.next = "";
                                return "string";
                            },
                            regex: ".*$",
                            next: "start"
                        }],
                        indentedHeredoc: [{
                            token: "string",
                            regex: "^ +"
                        }, {
                            onMatch: function (value, currentState, stack) {
                                if (value === stack[1]) {
                                    stack.shift();
                                    stack.shift();
                                    this.next = stack[0] || "start";
                                    return "support.class";
                                }
                                this.next = "";
                                return "string";
                            },
                            regex: ".*$",
                            next: "start"
                        }]
                    }
                }, {
                    regex: "$",
                    token: "empty",
                    next: function (currentState, stack) {
                        if (stack[0] === "heredoc" || stack[0] === "indentedHeredoc")
                            return stack[0];
                        return currentState;
                    }
                }, {
                    token: "string.character",
                    regex: "\\B\\?."
                }, {
                    token: "keyword.operator",
                    regex: "!|\\$|%|&|\\*|\\-\\-|\\-|\\+\\+|\\+|~|===|==|=|!=|!==|<=|>=|<<=|>>=|>>>=|<>|<|>|!|&&|\\|\\||\\?\\:|\\*=|%=|\\+=|\\-=|&=|\\^=|\\b(?:in|instanceof|new|delete|typeof|void)"
                }, {
                    token: "paren.lparen",
                    regex: "[[({]"
                }, {
                    token: "paren.rparen",
                    regex: "[\\])}]"
                }, {
                    token: "text",
                    regex: "\\s+"
                }
            ],
            "comment": [
                {
                    token: "comment", // closing comment
                    regex: "^=end(?:$|\\s.*$)",
                    next: "start"
                }, {
                    token: "comment", // comment spanning whole line
                    regex: ".+"
                }
            ]
        };

        this.normalizeRules();
    };

    oop.inherits(RubyHighlightRules, TextHighlightRules);

    exports.RubyHighlightRules = RubyHighlightRules;
});
            "validates_inclusion_of|validates_numericality_of|validates_with|validates_each|" +
            "authenticate_or_request_with_http_basic|authenticate_or_request_with_http_digest|" +