Pixel-Composer/scripts/luaHighlight/luaHighlight.gml

global.lua_arguments = [];

global.lua_reserved = ds_map_create();
var reserved = ["and", "break", "do", "else", "elseif", "end", "false", 
				"for", "function", "if", "in", "local", "nil", "not", 
				"or", "repeat", "return", "then", "true", "until", "while"];
					   
for( var i = 0, n = array_length(reserved); i < n; i++ )
	global.lua_reserved[? reserved[i]] = 1;

global.CODE_BREAK_TOKEN = [" ", "(", ")", "[", "]", "{", "}", ".", ",", ";", "+", "-", "*", "/", "^", "=", "--"];

function lua_token_splice(str) {
	var st = [];
	var ss = str;
	var sp, cc, del;
	
	do {
		sp = 999999;
		del = "";
		
		for( var i = 0, n = array_length(global.CODE_BREAK_TOKEN); i < n; i++ ) {
			var _del = global.CODE_BREAK_TOKEN[i];
			var _pos = string_pos(_del, ss);
			
			if(_pos != 0 && _pos < sp || (_pos == sp && string_length(del) < string_length(_del))) {
				sp  = _pos;
				del = _del;
			}
		}
		
		if(del == "") { //no delim left
			array_push(st, ss);
			break;
		}
		
		var _ss = string_copy(ss, 1, sp - 1);
		array_push(st, _ss);
		array_push(st, del);
		
		var dl = string_length(del);
		ss = string_copy(ss, sp + dl, string_length(ss) - sp - dl + 1);
	} until(sp == 0);
	
	return st;
}

function draw_code_lua(_x, _y, str) {
	var tx = _x;
	var ty = _y;
	
	var isStr  = true;
	var strSpl = string_splice(str, "\"");
	var amo    = array_length(strSpl);
	var comment = false;
	var word;
	
	for( var i = 0; i < amo; i++ ) {
		var _w = strSpl[i];
		_w = string_replace_all(_w, "\n", "");
		
		isStr = !isStr;
		
		if(isStr) {
			word = "\"" + string(_w);
			if(i < amo - 1) word += "\"";
			
			draw_set_color(COLORS.lua_highlight_string);
			draw_text_add(tx, ty, word);
			tx += string_width(word);
			continue;
		}
		
		var words = lua_token_splice(_w);
		
		for( var j = 0; j < array_length(words); j++ ) {
			word = words[j];
			var wordNoS = string_trim(word);
			
			if(wordNoS == "//") comment = true;
			
			draw_set_color(COLORS._main_text);
			if(comment)
				draw_set_color(COLORS.lua_highlight_comment);
			else if(word == "(" || word == ")" || word == "[" || word == "]" || word == "{" || word == "}")
				draw_set_color(COLORS.lua_highlight_bracklet);
			else if(ds_map_exists(global.lua_reserved, word))
				draw_set_color(COLORS.lua_highlight_keyword);
			else if(wordNoS == string_decimal(wordNoS))
				draw_set_color(COLORS.lua_highlight_number);
			else if(j < array_length(words) - 1) {
				if(words[j + 1] == "(")
					draw_set_color(COLORS.lua_highlight_function);
			}
			
			draw_text_add(tx, ty, word);
			tx += string_width(word);
		}
	}
}