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/*
 * CodePress - Real Time Syntax Highlighting Editor written in JavaScript - http://codepress.org/
 * 
 * Copyright (C) 2007 Fernando M.A.d.S. <fermads@gmail.com>
 *
 * Developers:
 *		Fernando M.A.d.S. <fermads@gmail.com>
 *		Michael Hurni <michael.hurni@gmail.com>
 * Contributors: 	
 *		Martin D. Kirk
 *
 * 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 = {
	scrolling : false,
	autocomplete : true,

	// set initial vars and start sh
	initialize : function() {
		if(typeof(editor)=='undefined' && !arguments[0]) return;
		body = document.getElementsByTagName('body')[0];
		body.innerHTML = body.innerHTML.replace(/\n/g,"");
		chars = '|32|46|62|8|'; // charcodes that trigger syntax highlighting
		cc = '\u2009'; // carret char
		editor = document.getElementsByTagName('pre')[0];
		document.designMode = 'on';
		document.addEventListener('keypress', this.keyHandler, true);
		window.addEventListener('scroll', function() { if(!CodePress.scrolling) CodePress.syntaxHighlight('scroll') }, false);
		completeChars = this.getCompleteChars();
		completeEndingChars =  this.getCompleteEndingChars();
	},

	// treat key bindings
	keyHandler : function(evt) {
    	keyCode = evt.keyCode;	
		charCode = evt.charCode;
		fromChar = String.fromCharCode(charCode);

		if((evt.ctrlKey || evt.metaKey) && evt.shiftKey && charCode!=90)  { // shortcuts = ctrl||appleKey+shift+key!=z(undo) 
			CodePress.shortcuts(charCode?charCode:keyCode);
		}
		else if( (completeEndingChars.indexOf('|'+fromChar+'|')!= -1 || completeChars.indexOf('|'+fromChar+'|')!=-1) && CodePress.autocomplete) { // auto complete
			if(!CodePress.completeEnding(fromChar))
			     CodePress.complete(fromChar);
		}
	    else if(chars.indexOf('|'+charCode+'|')!=-1||keyCode==13) { // syntax highlighting
			top.setTimeout(function(){CodePress.syntaxHighlight('generic');},100);
		}
		else if(keyCode==9 || evt.tabKey) {  // snippets activation (tab)
			CodePress.snippets(evt);
		}
		else if(keyCode==46||keyCode==8) { // save to history when delete or backspace pressed
		 	CodePress.actions.history[CodePress.actions.next()] = editor.innerHTML;
		}
		else if((charCode==122||charCode==121||charCode==90) && evt.ctrlKey) { // undo and redo
			(charCode==121||evt.shiftKey) ? CodePress.actions.redo() :  CodePress.actions.undo(); 
			evt.preventDefault();
		}
		else if(charCode==118 && evt.ctrlKey)  { // handle paste
		 	top.setTimeout(function(){CodePress.syntaxHighlight('generic');},100);
		}
		else if(charCode==99 && evt.ctrlKey)  { // handle cut
		 	//alert(window.getSelection().getRangeAt(0).toString().replace(/\t/g,'FFF'));
		}

	},

	// put cursor back to its original position after every parsing
	findString : function() {
		if(self.find(cc))
			window.getSelection().getRangeAt(0).deleteContents();
	},
	
	// split big files, highlighting parts of it
	split : function(code,flag) {
		if(flag=='scroll') {
			this.scrolling = true;
			return code;
		}
		else {
			this.scrolling = false;
			mid = code.indexOf(cc);
			if(mid-2000<0) {ini=0;end=4000;}
			else if(mid+2000>code.length) {ini=code.length-4000;end=code.length;}
			else {ini=mid-2000;end=mid+2000;}
			code = code.substring(ini,end);
			return code;
		}
	},
	
	getEditor : function() {
		if(!document.getElementsByTagName('pre')[0]) {
			body = document.getElementsByTagName('body')[0];