/*
 * 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.id = "codepress_" + obj.id;
    self.name = "codepress_" + obj.name;
    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 = 'absolute';
    self.options = self.textarea.className;

    self.initialize = function() {
        self.editor = self.contentWindow.CodePress;
        self.editor.body = self.contentWindow.document.getElementsByTagName('body')[0];
        self.editor.setCode(self.textarea.value);
        self.setOptions();
        self.editor.syntaxHighlight('init');
        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.editor.getCode() : self.textarea.value;
    }

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

    self.toggleAutoComplete = function() {
        self.editor.autocomplete = (self.editor.autocomplete) ? false : true;
    }

    self.toggleReadOnly = function() {
        self.textarea.readOnly = (self.textarea.readOnly) ? false : true;
        if (self.style.display != 'none') // prevent exception on FF + iframe with display:none
            self.editor.readOnly(self.textarea.readOnly ? true : false);
    }

    self.toggleLineNumbers = function() {
        var cn = self.editor.body.className;
        self.editor.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.setCode(self.textarea.value);
            self.editor.syntaxHighlight('init');
            self.style.display = 'inline';
            self.textarea.style.display = 'none';
        }
    }
    //提交前将数据保存回原来的textarea中
    self.save = function() {
        self.textarea.value = self.getCode();
        //self.textarea.innerHTML= self.getCode();
        self.textarea.disabled = false; //如果disabled为true时服务器端无法获取到数据
    }

    self.edit();
    return self;
}

CodePress.languages = {	
	csharp : 'C#', 
	css : 'CSS', 
	generic : 'Generic',
	html : 'HTML',
	java : 'Java', 
	javascript : 'JavaScript', 
	perl : 'Perl', 
	ruby : 'Ruby',	
	php : 'PHP', 
	text : 'Text', 
	sql : 'SQL',
	xsl : 'XSLT',
	xslsql : 'XSLSQL',
	vbscript : 'VBScript'
}

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', '');
        }
    }
    var _b = [];
    b = document.getElementsByTagName('input');
    for (var i = 0, n = b.length; i < n; i++) {
        if (b[i].className.match('codepress_save')) {
            b[i].disabled = true;
            _b.push(b[i]);
        }
    }
    t = document.getElementsByTagName('textarea');
    for (var i = 0, n = t.length; i < 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]);
        }
    }
    for (var i = 0, n = _b.length; i < n; i++) {
        _b[i].disabled = false;
    }
}

if(window.attachEvent) window.attachEvent('onload',CodePress.run);
else window.addEventListener('DOMContentLoaded',CodePress.run,false);
