/*
 * tex_highlight_rules.js
 *
 * Copyright (C) 2022 by Posit Software, PBC
 *
 * The Initial Developer of the Original Code is
 * Ajax.org B.V.
 * Portions created by the Initial Developer are Copyright (C) 2010
 * the Initial Developer. All Rights Reserved.
 *
 * 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/tex_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 TexHighlightRules = function(textClass) {

    if (!textClass)
        textClass = "text";

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

    this.$rules = {
        "start" : [
	        {
	            token : "comment",
	            regex : "%.*$"
	        }, {
	            token : textClass, // non-command
	            regex : "\\\\[$&%#\\{\\}]"
	        }, {
	            token : "keyword", // command
	            regex : "\\\\(?:documentclass|usepackage|newcounter|setcounter|addtocounter|value|arabic|stepcounter|newenvironment|renewenvironment|ref|vref|eqref|pageref|label|cite[a-zA-Z]*|tag|begin|end|bibitem)\\b",
               push : "nospell"
	        }, {
	            token : "keyword", // command
	            regex : "\\\\(?:[a-zA-Z0-9]+|[^a-zA-Z0-9])"
	        }, {
               // Obviously these are neither keywords nor operators, but
               // labelling them as such was the easiest way to get them
               // to be colored distinctly from regular text
               token : "paren.keyword.operator",
	            regex : "[[({]"
	        }, {
               // Obviously these are neither keywords nor operators, but
               // labelling them as such was the easiest way to get them
               // to be colored distinctly from regular text
               token : "paren.keyword.operator",
	            regex : "[\\])}]"
	        }, {
	            token : textClass,
	            regex : "\\s+"
	        }
        ],
        // This mode is necessary to prevent spell checking, but to keep the
        // same syntax highlighting behavior. The list of commands comes from
        // Texlipse.
        "nospell" : [
           {
               token : "comment",
               regex : "%.*$",
               next  : "pop"
           }, {
               token : "nospell." + textClass, // non-command
               regex : "\\\\[$&%#\\{\\}]"
           }, {
               token : "keyword", // command
               regex : "\\\\(?:documentclass|usepackage|newcounter|setcounter|addtocounter|value|arabic|stepcounter|newenvironment|renewenvironment|ref|vref|eqref|pageref|label|cite[a-zA-Z]*|tag|begin|end|bibitem)\\b"
           }, {
               token : "keyword", // command
               regex : "\\\\(?:[a-zA-Z0-9]+|[^a-zA-Z0-9])",
               next  : "pop"
           }, {
               token : "paren.keyword.operator",
               regex : "[[({]"
           }, {
               token : "paren.keyword.operator",
               regex : "[\\])]"
           }, {
               token : "paren.keyword.operator",
               regex : "}",
               next  : "pop"
           }, {
               token : "nospell." + textClass,
               regex : "\\s+"
           }, {
               token : "nospell." + textClass,
               regex : "\\w+"
           }
        ]
    };

    this.normalizeRules();
};

oop.inherits(TexHighlightRules, TextHighlightRules);

exports.TexHighlightRules = exports.LatexHighlightRules = TexHighlightRules;
});
