// This is a grammar for highlight.js used by mdbook.
//
// - Guide on writing highlighters: https://highlightjs.readthedocs.io/en/latest/language-guide.html
// - possible values for `scope`/`className`: https://highlightjs.readthedocs.io/en/latest/css-classes-reference.html

/*
Language: Dream Maker
Author: Pieter-Jan Briers <pieterjan.briers@gmail.com>
Various bits taken from Javascript, Rust and C++'s file.
Description: Dream Maker language used by the BYOND game engine.
Category: common
*/

var BLOCK_COMMENT = hljs.COMMENT('/\\*', '\\*/', {contains: ['self']});
var KEYWORDS =
  'var proc verb global tmp static const set as ' +
  'new del ' +
  'sleep spawn break continue do else for in step goto if return switch while try catch throw';
var BUILTINS =
  'usr src world args ' +
  'list datum area turf obj mob atom movable client database exception ' +
  'icon image matrix mutable_appearance savefile sound regex operator';
var LITERAL = 'null';
var SUBST = {
  className: 'subst',
  begin: '\\[', end: '\\]',
  keywords: {
	built_in: BUILTINS,
	literal: LITERAL
  },
  contains: []  // defined later
};
var STRING = {
  className: 'string',
  begin: '"', end: '"',
  contains: [
	hljs.BACKSLASH_ESCAPE,
	SUBST
  ]
};
var STRING_MULTILINE = {
  className: 'string',
  begin: '\\{"', end: '"\\}',
  contains: [
	hljs.BACKSLASH_ESCAPE,
	SUBST
  ]
};
var FILE_STRING = {
  className: 'string',
  begin: "'", end: "'"
};
var NUMBER = {
  className: 'number',
  variants: [
	{ begin: '1\\.\\#IND' },
	{ begin: '1\\.\\#INF' },
	{ begin: hljs.C_NUMBER_RE },
  ],
  relevance: 0
};
var CONSTANT = {
  className: 'literal',
  begin: /\b[A-Z_][A-Z_0-9]*\b/
};
var PREPROCESSOR = {
  className: 'meta',
  begin: /#\s*[a-z]+\b/, end: /$/,
  keywords: {
	'meta-keyword':
	  'if else elif endif define undef warn error ' +
	  'ifdef ifndef include'
  },
  contains: [
	{
	  begin: /\\\n/, relevance: 0
	},
	STRING,
	FILE_STRING,
	NUMBER,
	CONSTANT,
	hljs.C_LINE_COMMENT_MODE,
	BLOCK_COMMENT,
  ]
};
SUBST.contains = [
  STRING,
  FILE_STRING,
  NUMBER,
  CONSTANT
];

hljs.registerLanguage('dm', (hljs) => ({
	  aliases: ['byond', 'dreammaker'],
	  keywords: {
		keyword: KEYWORDS,
		literal: LITERAL,
		built_in: BUILTINS
	  },
	  contains: [
		hljs.C_LINE_COMMENT_MODE,
		BLOCK_COMMENT,
		PREPROCESSOR,
		STRING,
		FILE_STRING,
		STRING_MULTILINE,
		NUMBER,
		CONSTANT
	  ]
  }));

hljs.initHighlightingOnLoad();