/*
 * DO NOT REMOVE THIS NOTICE
 *
 * PROJECT:   JsDecoder
 * VERSION:   1.1.0
 * COPYRIGHT: (c) 2004-2008 Cezary Tomczak
 * LINK:      http://code.gosu.pl
 * LICENSE:   GPL
 */

function JsColorizer() {
	this.color = {
		"keyword":   "#0000FF",
		"object":    "#FF0000",
		"quotation": "#FF00FF",
		"comment":   "#008000"
	};

	this.s = ""; // code to colorize
	this.i = 0;
	this.len = 0;

	this.ret = ""; // colorized code
	this.lastWord = ""; // last alphanumeric word
	this.nextChar = "";
	this.prevChar = "";

	this.code = [""];
	this.row = 0;

	this.times = {
		quotation: 0, quotation_calls: 0,
		lineComment: 0, lineComment_calls: 0,
		comment: 0, comment_calls: 0,
		slash: 0, slash_calls: 0,
		word: 0, word_calls: 0
	};

	this.write = function (s)
	{
		this.code[this.row] += s;
		if (s.length == 1) {
			this.prevChar = s;
		} else {
			this.prevCharInit();
		}
	};
	this.writeLine = function ()
	{
		this.code.push("");
		this.row++;
		this.prevChar = "\n";
	};
	this.prevCharInit = function ()
	{
		this.prevChar = this.code[this.row].charAt(this.code[this.row].length - 1);
	};

	this.showTimes = function ()
	{
		var ret = '';
		for (var f in this.times) {
			var t = this.times[f];
			if (/_calls/.test(f)) {
				ret += f+': '+t+"\n";
			} else {
				ret += f+': '+time_round(t)+" sec\n";
			}
		}
		return ret;
	};

	this.colorize = function()
	{
		this.len = this.s.length;
		while (this.i < this.len)
		{
			var c = this.s.charAt(this.i);
			if (this.len - 1 == this.i) {
				this.nextChar = "";
			} else {
				this.nextChar = this.s.charAt(this.i + 1);
			}
			switch (c) {
				case "\n":
					if (this.lastWord.length) { this.word(); }
					this.lastWord = '';
					this.writeLine();
					break;
				case "'":
				case '"':
				case "`":
					if (this.lastWord.length) { this.word(); }
					this.lastWord = '';
					this.quotation(c);
					break;
				case "/":
					if (this.lastWord.length) { this.word(); }
					this.lastWord = '';
					if ("/" == this.nextChar) {
						this.lineComment();
					} else if ("*" == this.nextChar) {
						this.comment();
					} else {
						this.slash();
					}
					break;
				default:
					if (/^\w$/.test(c)) {
						this.lastWord += c;
					} else {
						if (this.lastWord.length) { this.word(); }
						this.lastWord = '';
						this.write(c);
					}
					break;
			}
			this.i++;
		}
		this.write(this.lastWord);
		return this.code.join("\n");
	};

	this.quotation = function(quotation)
	{
		//var time = time_start();
		var s = quotation;
		var escaped = false;
		while (this.i < this.len - 1) {
			this.i++;
			var c = this.s.charAt(this.i);
			if ("\\" == c) {
				escaped = (escaped ? false : true);
			}
			s += c;
			if (c == quotation) {
				if (!escaped) {
					break;
				}
			}
			if ("\\" != c) {
				escaped = false;
			}
		}
		this.write('<font color="'+this.color.quotation+'">' + s + '</font>');
		//this.times.quotation += time_get(time);
		//this.times.quotation_calls++;
	};

	this.lineComment = function()
	{
		//var time = time_start();
		var s = "//";
		this.i++;
		while (this.i < this.len - 1) {
			this.i++;
			var c = this.s.charAt(this.i);
			s += c;
			if ("\n" == c) {
				break;
			}
		}
		this.write('<font color="'+this.color.comment+'">' + s + '</font>');
		//this.times.lineComment += time_get(time);
		//this.times.lineComment_calls++;
	};

	this.comment = function()
	{
		//var time = time_start();
		var s = "/*";
		this.i++;
		var c = "";
		var prevC = "";
		while (this.i < this.len - 1) {
			this.i++;
			prevC = c;
			c = this.s.charAt(this.i);
			s += c;
			if ("/" == c && "*" == prevC) {
				break;
			}
		}
		this.write('<font color="'+this.color.comment+'">' + s + '</font>');
		//this.times.comment += time_get(time);
		//this.times.comment_calls++;
	};

	/* SLASH
	 * divisor /= or *\/ (4/5 , a/5)
	 * regexp /\w/ (//.test() , var asd = /some/;) */
	this.slash = function()
	{
		//var time = time_start();
		var a_i = this.i - 1;
		var a_c = this.s.charAt(a_i);
		for (a_i = this.i - 1; a_i >= 0; a_i--) {
			var c2 = this.s.charAt(a_i);
			if (" " == c2 || "\t" == c2) {
				continue;
			}
			a_c = this.s.charAt(a_i);
			break;
		}
		var a = /^\w+$/.test(a_c) || ']' == a_c || ')' == a_c;
		var b = ("*" == this.prevChar);
		if (a || b) {
			if (a) {
				if ("=" == this.nextChar) {
					this.write("/");
				} else {
					this.write("/");
				}
			} else if (b) {
				this.write("/");
			}
		} else if (')' == this.prevChar) {
			this.write('/');
		} else {
			var ret = '';
			if ("=" == this.prevChar) {
				ret += "/";
			} else {
				ret += "/";
			}
			var escaped = false;
			while (this.i < this.len - 1) {
				this.i++;
				var c = this.s.charAt(this.i);
				if ("\\" == c) {
					escaped = (escaped ? false : true);
				}
				ret += c;
				if ("/" == c) {
					if (!escaped) {
						break;
					}
				}
				if ("\\" != c) {
					escaped = false;
				}
			}
			this.write('<font color="'+this.color.quotation+'">' + ret + '</font>');
		}
		//this.times.slash += time_get(time);
		//this.times.slash_calls++;
	};

	this.word = function()
	{
		//var time = time_start();
		if (this.keywords.indexOf(this.lastWord) != -1) {
			this.write('<font color="'+this.color.keyword+'">' + this.lastWord + '</font>');
		} else if (this.objects.indexOf(this.lastWord) != -1) {
			this.write('<font color="'+this.color.object+'">' + this.lastWord + '</font>');
		} else {
			this.write(this.lastWord);
		}
		//this.times.word += time_get(time);
		//this.times.word_calls++;
	};

	this.keywords = [
		"abstract", "boolean", "break", "byte",
		"case", "catch", "char", "class", "const", "constructor", "continue",
		"default", "delete", "do", "double",
		"else", "extends",
		"false", "final", "finally", "float", "for", "function",
		"goto",
		"if", "implements", "import", "in", "instanceof", "int", "interface",
		"let", "long",
		"native", "new", "null",
		"package", "private", "protected", "public",
		"return",
		"short", "static", "super", "switch", "synchronized",
		"this", "throw", "throws", "transient", "true", "try", "typeof",
		"var", "void",
		"while", "with"
	];

	this.objects = [
		"Anchor", "anchors", "Applet", "applets", "Area", "Array", "Button", "Checkbox",
		"Date", "document", "FileUpload", "Form", "forms", "Frame", "frames", "Hidden", "history",
		"Image", "images", "Link", "links", "Area", "location", "Math", "MimeType", "mimeTypes",
		"navigator", "options", "Password", "Plugin", "plugins", "Radio", "Reset", "Select",
		"String", "Submit", "Text", "Textarea", "window"
	];
}