/*
 * rdoc_highlight_rules.js
 *
 * Copyright (C) 2022 by Posit Software, PBC
 *
 * Unless you have received this program directly from Posit Software pursuant
 * to the terms of a commercial license agreement with Posit Software, then
 * this program is licensed to you under the terms of version 3 of the
 * GNU Affero General Public License. This program is distributed WITHOUT
 * ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT,
 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the
 * AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details.
 *
 */
define("mode/rdoc_highlight_rules", ["require", "exports", "module"], function(require, exports, module) {

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

var RDocHighlightRules = function() {

    // regexp must not have capturing parentheses. Use (?:) instead.
    // regexps are ordered -> the first match is used
    var keywords =
        "name|alias|method|S3method|S4method|item|code|" +
        "preformatted|kbd|pkg|var|env|option|command|author|" +
        "email|url|source|cite|acronym|href|code|preformatted|" +
        "link|eqn|deqn|keyword|usage|examples|dontrun|dontshow|" +
        "figure|if|ifelse|Sexpr|RdOpts|inputencoding|usepackage";

    keywords = "\\" + keywords.replace(/\|/g, "|\\");

    var keywordMapper = this.createKeywordMapper({
        "keyword": keywords
    }, "identifer");

    this.$rules = {
        "start" : [
	        {
	            token : "comment",
	            regex : "%.*$"
	        }, {
	            token : "text", // non-command
	            regex : "\\\\[$&%#\\{\\}]"
	        }, {
	            token : "keyword", // command
	            regex : "\\\\(?:name|alias|method|S3method|S4method|item|code|preformatted|kbd|pkg|var|env|option|command|author|email|url|source|cite|acronym|href|code|preformatted|link|eqn|deqn|keyword|usage|examples|dontrun|dontshow|figure|if|ifelse|Sexpr|RdOpts|inputencoding|usepackage)\\b",
               next : "nospell"
	        }, {
	            token : "keyword", // command
	            regex : "\\\\(?:[a-zA-z0-9]+|[^a-zA-z0-9])"
	        }, {
               // Obviously these are neither keywords nor operators, but
               // labelling them as such was the easiest way to get them
               // to be colored distinctly from regular text
               token : "paren.keyword.operator",
	            regex : "[[({]"
	        }, {
               // Obviously these are neither keywords nor operators, but
               // labelling them as such was the easiest way to get them
               // to be colored distinctly from regular text
               token : "paren.keyword.operator",
	            regex : "[\\])}]"
	        }, {
	            token : "text",
	            regex : "\\s+"
	        }
        ],
        // This mode is necessary to prevent spell checking, but to keep the
        // same syntax highlighting behavior.
        "nospell" : [
           {
               token : "comment",
               regex : "%.*$",
               next : "start"
           }, {
               token : "nospell.text", // non-command
               regex : "\\\\[$&%#\\{\\}]"
           }, {
               token : "keyword", // command
               regex : "\\\\(?:name|alias|method|S3method|S4method|item|code|preformatted|kbd|pkg|var|env|option|command|author|email|url|source|cite|acronym|href|code|preformatted|link|eqn|deqn|keyword|usage|examples|dontrun|dontshow|figure|if|ifelse|Sexpr|RdOpts|inputencoding|usepackage)\\b"
           }, {
               token : "keyword", // command
               regex : "\\\\(?:[a-zA-z0-9]+|[^a-zA-z0-9])",
               next : "start"
           }, {
               token : "paren.keyword.operator",
               regex : "[[({]"
           }, {
               token : "paren.keyword.operator",
               regex : "[\\])]"
           }, {
               token : "paren.keyword.operator",
               regex : "}",
               next : "start"
           }, {
               token : "nospell.text",
               regex : "\\s+"
           }, {
               token : "nospell.text",
               regex : "\\w+"
           }
        ]
    };
};

oop.inherits(RDocHighlightRules, TextHighlightRules);

exports.RDocHighlightRules = RDocHighlightRules;
});
