source: trunk/www.guidonia.net/wp/wp-includes/js/codepress/codepress.js@ 44

/*
 * 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 = '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';
                }
        }

        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',
        vbscript : 'VBScript'
}


CodePress.run = function() {
        // Modified for WordPress compat to prevent loading on webkit and to
        // reference a codepress_path which is specified externally.
        if (navigator.userAgent.toLowerCase().indexOf('webkit') != -1)
                return;
        CodePress.path = codepress_path;
        var t = document.getElementsByTagName('textarea'), i, id;
        for(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]);
                } 
        }
}

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