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gecko.js
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Thu, Oct 29, 7:25 AM

gecko.js
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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];
if(!body.innerHTML) return body;
if(body.innerHTML=="<br>") body.innerHTML = "<pre> </pre>";
else body.innerHTML = "<pre>"+body.innerHTML+"</pre>";
}
return document.getElementsByTagName('pre')[0];
},
// syntax highlighting parser
syntaxHighlight : function(flag) {
//if(document.designMode=='off') document.designMode='on'
if(flag != 'init') { window.getSelection().getRangeAt(0).insertNode(document.createTextNode(cc));}
editor = CodePress.getEditor();
o = editor.innerHTML;
o = o.replace(/<br>/g,'\n');
o = o.replace(/<.*?>/g,'');
x = z = this.split(o,flag);
x = x.replace(/\n/g,'<br>');
if(arguments[1]&&arguments[2]) x = x.replace(arguments[1],arguments[2]);
for(i=0;i<Language.syntax.length;i++)
x = x.replace(Language.syntax[i].input,Language.syntax[i].output);
editor.innerHTML = this.actions.history[this.actions.next()] = (flag=='scroll') ? x : o.split(z).join(x);
if(flag!='init') this.findString();
},
getLastWord : function() {
var rangeAndCaret = CodePress.getRangeAndCaret();
words = rangeAndCaret[0].substring(rangeAndCaret[1]-40,rangeAndCaret[1]);
words = words.replace(/[\s\n\r\);\W]/g,'\n').split('\n');
return words[words.length-1].replace(/[\W]/gi,'').toLowerCase();
},
snippets : function(evt) {
var snippets = Language.snippets;
var trigger = this.getLastWord();
// modified to insert tab on FF
var noInsertion = 1;
for (var i=0; i<snippets.length; i++) {
if(snippets[i].input == trigger) {
noInsertion = 0;
var content = snippets[i].output.replace(/</g,'&lt;');
content = content.replace(/>/g,'&gt;');
if(content.indexOf('$0')<0) content += cc;
else content = content.replace(/\$0/,cc);
content = content.replace(/\n/g,'<br>');
var pattern = new RegExp(trigger+cc,'gi');
evt.preventDefault(); // prevent the tab key from being added
this.syntaxHighlight('snippets',pattern,content);
}
}
/* Modified to insert tab on FF
* @author Asad Khan <asadkn [at-the-rate-of] gmail [dot] com>
*/
if (noInsertion == 1) {
var range = window.getSelection().getRangeAt(0);
// for the single line
range.setEnd(range.startContainer, range.startOffset);
var ele = document.createTextNode('\t');
range.insertNode(ele);
range.setStartAfter(ele);
evt.preventDefault();
}
},
readOnly : function() {
document.designMode = (arguments[0]) ? 'off' : 'on';
},
complete : function(trigger) {
window.getSelection().getRangeAt(0).deleteContents();
var complete = Language.complete;
for (var i=0; i<complete.length; i++) {
if(complete[i].input == trigger) {
var pattern = new RegExp('\\'+trigger+cc);
var content = complete[i].output.replace(/\$0/g,cc);
parent.setTimeout(function () { CodePress.syntaxHighlight('complete',pattern,content)},0); // wait for char to appear on screen
}
}
},
getCompleteChars : function() {
var cChars = '';
for(var i=0;i<Language.complete.length;i++)
cChars += '|'+Language.complete[i].input;
return cChars+'|';
},
getCompleteEndingChars : function() {
var cChars = '';
for(var i=0;i<Language.complete.length;i++)
cChars += '|'+Language.complete[i].output.charAt(Language.complete[i].output.length-1);
return cChars+'|';
},
completeEnding : function(trigger) {
var range = window.getSelection().getRangeAt(0);
try {
range.setEnd(range.endContainer, range.endOffset+1)
}
catch(e) {
return false;
}
var next_character = range.toString()
range.setEnd(range.endContainer, range.endOffset-1)
if(next_character != trigger) return false;
else {
range.setEnd(range.endContainer, range.endOffset+1)
range.deleteContents();
return true;
}
},
shortcuts : function() {
var cCode = arguments[0];
if(cCode==13) cCode = '[enter]';
else if(cCode==32) cCode = '[space]';
else cCode = '['+String.fromCharCode(charCode).toLowerCase()+']';
for(var i=0;i<Language.shortcuts.length;i++)
if(Language.shortcuts[i].input == cCode)
this.insertCode(Language.shortcuts[i].output,false);
},
getRangeAndCaret : function() {
var range = window.getSelection().getRangeAt(0);
var range2 = range.cloneRange();
var node = range.endContainer;
var caret = range.endOffset;
range2.selectNode(node);
return [range2.toString(),caret];
},
insertCode : function(code,replaceCursorBefore) {
var range = window.getSelection().getRangeAt(0);
var node = window.document.createTextNode(code);
var selct = window.getSelection();
var range2 = range.cloneRange();
// Insert text at cursor position
selct.removeAllRanges();
range.deleteContents();
range.insertNode(node);
// Move the cursor to the end of text
range2.selectNode(node);
range2.collapse(replaceCursorBefore);
selct.removeAllRanges();
selct.addRange(range2);
},
// get code from editor
getCode : function() {
if(!document.getElementsByTagName('pre')[0] || editor.innerHTML == '')
editor = CodePress.getEditor();
var code = editor.innerHTML;
code = code.replace(/<br>/g,'\n');
code = code.replace(/\u2009/g,'');
code = code.replace(/<.*?>/g,'');
code = code.replace(/&lt;/g,'<');
code = code.replace(/&gt;/g,'>');
code = code.replace(/&amp;/gi,'&');
return code;
},
// put code inside editor
setCode : function() {
var code = arguments[0];
code = code.replace(/\u2009/gi,'');
code = code.replace(/&/gi,'&amp;');
code = code.replace(/</g,'&lt;');
code = code.replace(/>/g,'&gt;');
editor.innerHTML = code;
if (code == '')
document.getElementsByTagName('body')[0].innerHTML = '';
},
// undo and redo methods
actions : {
pos : -1, // actual history position
history : [], // history vector
undo : function() {
editor = CodePress.getEditor();
if(editor.innerHTML.indexOf(cc)==-1){
if(editor.innerHTML != " ")
window.getSelection().getRangeAt(0).insertNode(document.createTextNode(cc));
this.history[this.pos] = editor.innerHTML;
}
this.pos --;
if(typeof(this.history[this.pos])=='undefined') this.pos ++;
editor.innerHTML = this.history[this.pos];
if(editor.innerHTML.indexOf(cc)>-1) editor.innerHTML+=cc;
CodePress.findString();
},
redo : function() {
// editor = CodePress.getEditor();
this.pos++;
if(typeof(this.history[this.pos])=='undefined') this.pos--;
editor.innerHTML = this.history[this.pos];
CodePress.findString();
},
next : function() { // get next vector position and clean old ones
if(this.pos>20) this.history[this.pos-21] = undefined;
return ++this.pos;
}
}
}
Language={};
window.addEventListener('load', function() { CodePress.initialize('new'); }, true);

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