/*
 * CodePress - Real Time Syntax Highlighting Editor written in JavaScript - http://codepress.org/
 * 
 * Copyright (C) 2006 Fernando M.A.d.S. <fermads@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the 
 * GNU Lesser General Public License as published by the Free Software Foundation.
 * 
 * Read the full licence: http://www.opensource.org/licenses/lgpl-license.php
 */

CodePress = function(obj)
{
	var self = document.createElement('iframe');
	self.textarea = obj;
	self.textarea.disabled = true;
	self.textarea.style.overflow = 'hidden';
	self.style.height = self.textarea.clientHeight +'px';
	self.style.width = self.textarea.clientWidth +'px';
	self.textarea.style.overflow = 'auto';
//	self.style.border = '1px solid gray';
	self.frameBorder = 0; // remove IE internal iframe border
	self.style.visibility = 'hidden';
	self.style.position = CodePress.isWebkit ? 'static' : 'absolute';
	self.options = self.textarea.className;

	self.initialize = function() {
		self.body = self.contentWindow.document.getElementsByTagName('body')[0];
		self.editor = self.contentWindow.CodePress;
		self.contentWindow.CodePress.setCode(self.textarea.value);
		self.contentWindow.CodePress.syntaxHighlight('init');
		self.setOptions();
		self.textarea.style.display = 'none';
		self.style.position = 'static';
		self.style.visibility = 'visible';
		self.style.display = 'inline';
	}
	
	// obj can by a textarea id or a string (code)
	self.edit = function(obj,language) {
		if (obj) self.textarea.value = document.getElementById(obj) ? document.getElementById(obj).value : obj;
		if (!self.textarea.disabled) return;
		self.language = language ? language : self.getLanguage();
		self.src = CodePress.path + 'codepress.html?language=' + self.language + '&ts=' + (new Date).getTime();
		if (self.attachEvent) self.attachEvent('onload',self.initialize);
		else self.addEventListener('load',self.initialize,false);
	}

	self.getLanguage = function() {
		for (language in CodePress.languages) 
			if(self.options.match('\\b'+language+'\\b')) 
				return CodePress.languages[language] ? language : 'generic';
	}
	
	self.setOptions = function() {
		if(self.options.match('autocomplete-off')) self.toggleAutoComplete();
		if(self.options.match('readonly-on')) self.toggleReadOnly();
		if(self.options.match('linenumbers-off')) self.toggleLineNumbers();
	}
	
	self.getCode = function() {
		return self.textarea.disabled ? self.contentWindow.CodePress.getCode() : self.textarea.value;
	}

	self.setCode = function(code) {
		self.textarea.disabled 
			? self.contentWindow.CodePress.setCode(code) 
			: self.textarea.value = code;
	}

	self.toggleAutoComplete = function() {
		self.contentWindow.CodePress.autocomplete = !self.contentWindow.CodePress.autocomplete;
	}
	
	self.toggleReadOnly = function() {
		self.textarea.readOnly = !self.textarea.readOnly;
		if (self.style.display != 'none') // prevent exception on FF + iframe with display:none
			self.contentWindow.CodePress.readOnly(self.textarea.readOnly);
	}
	
	self.toggleLineNumbers = function() {
		var cn = self.body.className;
		self.body.className = (cn==''||cn=='show-line-numbers') ? 'hide-line-numbers' : 'show-line-numbers';
	}
	
	self.toggleEditor = function() {
		if (self.textarea.disabled)
		{
			self.textarea.value = self.getCode();
			self.textarea.disabled = false;
			self.style.display = 'none';
			self.textarea.style.display = 'inline';
		}
		else
		{
			self.textarea.disabled = true;
			self.style.display = 'inline';
			self.textarea.style.display = 'none';
			if (CodePress.isWebkit) return;
			self.setCode(self.textarea.value);
			self.contentWindow.CodePress.syntaxHighlight('init');
		}
	}
	
	self.edit();
	return self;
}

CodePress.languages = {
	css : 'CSS', 
	generic : 'Generic',
	html : 'HTML',
	javascript : 'JavaScript', 
	perl : 'Perl', 
	php : 'PHP', 
	text : 'Text'
}

CodePress.isWebkit = (navigator.userAgent.match(/AppleWebKit\/(\d\d\d)/) && parseInt(RegExp.$1) < 500);

CodePress.run = function()
{
	s = document.getElementsByTagName('script');
	for (var i=0,n=s.length;i<n;i++)
	{
		if(s[i].src.match('codepress.js'))
			CodePress.path = s[i].src.replace('codepress.js','');
	}
	t = document.getElementsByTagName('textarea');
	
	
	CodePress.fu(t.length,0);

}

CodePress.fu=function(n,i) {
	
	if(t[i].className.match('codepress')) {
		id = t[i].id;
		t[i].id = id+'_cp';
		eval(id+' = new CodePress(t[i])');
		t[i].parentNode.insertBefore(eval(id), t[i]);
	} 
	
	if(t[i+1]) {
	
		if(navigator.userAgent.match('Opera')) { setTimeout("CodePress.fu("+n+","+(i+1)+")",700); } // lame opera hack
	
		else { CodePress.fu(n,i+1) }

	}
}

if (window.attachEvent) window.attachEvent('onload',CodePress.run);
else if (navigator.userAgent.match(/AppleWebKit/)) window.addEventListener('load',CodePress.run,false);
else window.addEventListener('DOMContentLoaded',CodePress.run,false);