I was roaming at digg when i stumble upon this page:CSS+Javascript power. Fancy menu. Inside, i was amazed to see the way the snippets presented. In an expandable box. You can even see the box expanding line by line.
If you see my post yesterday, I tried my best to reproduce the same effect. But I failed.
To successfully create the expandable box, modify the following files of your active WordPress template/theme by adding the snippet:
style.css
.codediv
{
height:21px; width:470px;
overflow:hidden;
border: #333333 thin solid;
font-size: 11px;
display: block;
background-color: #fff;
}
.codeclicker
{
cursor:pointer;
}
header.php
<script language="javascript" type="text/javascript" src="<?php bloginfo('wpurl') ?>/js/behavior.js" ></script>
<script language="javascript" type="text/javascript" src="<?php bloginfo('wpurl') ?>/js/selector.js" ></script>
<script language="javascript" type="text/javascript">
var myrules = {
'.codeclicker' : {
onclick : function() {
//alert(this.parentNode.tagName);
var o = this.parentNode;
if (o.style.overflow == 'hidden') {
o.style.height = '100%';
o.style.overflow = 'scroll';
}
else {
o.style.height = '21px';
o.style.overflow = 'hidden';
}
}
}
};
Behavior.register(myrules);
</script>
Create a folder called “js” on your WordPress installation folder and create the following files on that folder:
selector.js
/* document.getElementsBySelector(selector)
- returns an array of element objects from the current document
matching the CSS selector. Selectors can contain element names,
class names and ids and can be nested. For example:elements = document.getElementsBySelect('div#main p a.external')
Will return an array of all 'a' elements with 'external' in their
class attribute that are contained inside 'p' elements that are
contained inside the 'div' element which has id="main"
New in version 0.4: Support for CSS2 and CSS3 attribute selectors:
See http://www.w3.org/TR/css3-selectors/#attribute-selectors
Version 0.4 - Simon Willison, March 25th 2003
-- Works in Phoenix 0.5, Mozilla 1.3, Opera 7, Internet Explorer 6, Internet Explorer 5 on Windows
-- Opera 7 fails
*/
function getAllChildren(e) {
// Returns all children of element. Workaround required for IE5/Windows. Ugh.
return e.all ? e.all : e.getElementsByTagName('*');
}
document.getElementsBySelector = function(selector) {
// Attempt to fail gracefully in lesser browsers
if (!document.getElementsByTagName) {
return new Array();
}
// Split selector in to tokens
var tokens = selector.split(' ');
var currentContext = new Array(document);
for (var i = 0; i < tokens.length; i++) {
token = tokens[i].replace(/^s+/,'').replace(/s+$/,'');
if (token.indexOf('#') > -1) {
// Token is an ID selector
var bits = token.split('#');
var tagName = bits[0];
var id = bits[1];
var element = document.getElementById(id);
if (tagName && element.nodeName.toLowerCase() != tagName) {
// tag with that ID not found, return false
return new Array();
}
// Set currentContext to contain just this element
currentContext = new Array(element);
continue; // Skip to next token
}
if (token.indexOf('.') > -1) {
// Token contains a class selector
var bits = token.split('.');
var tagName = bits[0];
var className = bits[1];
if (!tagName) {
tagName = '*';
}
// Get elements matching tag, filter them for class selector
var found = new Array;
var foundCount = 0;
for (var h = 0; h < currentContext.length; h++) {
var elements;
if (tagName == '*') {
elements = getAllChildren(currentContext[h]);
} else {
elements = currentContext[h].getElementsByTagName(tagName);
}
for (var j = 0; j < elements.length; j++) {
found[foundCount++] = elements[j];
}
}
currentContext = new Array();
var currentContextIndex = 0;
for (var k = 0; k < found.length; k++) {
if (found[k].className && found[k].className.match(new RegExp('b'+className+'b'))) {
currentContext[currentContextIndex++] = found[k];
}
}
continue; // Skip to next token
}
// Code to deal with attribute selectors
if (token.match(/^(w*)[(w+)([=~|^$*]?)=?"?([^]"]*)"?]$/)) {
var tagName = RegExp.$1;
var attrName = RegExp.$2;
var attrOperator = RegExp.$3;
var attrValue = RegExp.$4;
if (!tagName) {
tagName = '*';
}
// Grab all of the tagName elements within current context
var found = new Array;
var foundCount = 0;
for (var h = 0; h < currentContext.length; h++) {
var elements;
if (tagName == '*') {
elements = getAllChildren(currentContext[h]);
} else {
elements = currentContext[h].getElementsByTagName(tagName);
}
for (var j = 0; j < elements.length; j++) {
found[foundCount++] = elements[j];
}
}
currentContext = new Array();
var currentContextIndex = 0;
var checkFunction; // This function will be used to filter the elements
switch (attrOperator) {
case '=': // Equality
checkFunction = function(e) { return (e.getAttribute(attrName) == attrValue); };
break;
case '~': // Match one of space seperated words
checkFunction = function(e) { return (e.getAttribute(attrName).match(new RegExp('b'+attrValue+'b'))); };
break;
case '|': // Match start with value followed by optional hyphen
checkFunction = function(e) { return (e.getAttribute(attrName).match(new RegExp('^'+attrValue+'-?'))); };
break;
case '^': // Match starts with value
checkFunction = function(e) { return (e.getAttribute(attrName).indexOf(attrValue) == 0); };
break;
case '$': // Match ends with value - fails with "Warning" in Opera 7
checkFunction = function(e) {
return (e.getAttribute(attrName).lastIndexOf(attrValue) == e.getAttribute(attrName).length - attrValue.length);
};
break;
case '*': // Match ends with value
checkFunction = function(e) {
return (e.getAttribute(attrName).indexOf(attrValue) > -1);
};
break;
default :
// Just test for existence of attribute
checkFunction = function(e) { return e.getAttribute(attrName); };
}
currentContext = new Array();
var currentContextIndex = 0;
for (var k = 0; k < found.length; k++) {
if (checkFunction(found[k])) {
currentContext[currentContextIndex++] = found[k];
}
}
// alert('Attribute Selector: '+tagName+' '+attrName+' '+attrOperator+' '+attrValue);
continue; // Skip to next token
}
// If we get here, token is JUST an element (not a class or ID selector)
tagName = token;
var found = new Array();
var foundCount = 0;
for (var h = 0; h < currentContext.length; h++) {
var elements = currentContext[h].getElementsByTagName(tagName);
for (var j = 0; j < elements.length; j++) {
found[foundCount++] = elements[j];
}
}
currentContext = found;
}
return currentContext;
}
/* That revolting regular expression explained
/^(w+)[(w+)([=~|^$*]?)=?"?([^]"]*)"?]$/
---/ ---/-------------/ -------/
| | | |
| | | The value
| | ~,|,^,$,* or =
| Attribute
Tag
*/
behavior.js
// behavior.js - by Dave Herman
// Copyright (C) 2005 by Dave Herman
//
// Based on behaviour.js by Ben Nolan, June 2005
// and getElementBySelector.js by Simon Willison, 2004.
//
// This library 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; either version 2.1 of the License, or (at
// your option) any later version.
//
// This library is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
// License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with this library; if not, write to the Free Software Foundation,
// Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
// =============================================================================
// Class: HandlerSet
// =============================================================================
function HandlerSet() {
this.clearHandlers();
}
HandlerSet.prototype = {
addHandler : function(f, key) {
key = key || this.uniqueID++;
this.installedHandlers[key] = f;
return key;
},
removeHandler : function(key) {
delete this.installedHandlers[key];
},
clearHandlers : function() {
this.installedHandlers = { };
this.uniqueID = 0;
},
replaceHandlers : function(f, key) {
clearHandlers();
return addHandler(f, key);
},
applyAll : function(object, arguments) {
for (var handler in this.installedHandlers) {
this.installedHandlers[handler].apply(object, arguments);
}
},
debug : function() {
var str = "";
for (var p in this.installedHandlers) {
str += p + " => " + this.installedHandlers[p] + "n";
}
alert(str);
}
};
// =============================================================================
// Function Class: EventHandler
// =============================================================================
function isEventHandler(x) {
return (typeof x == 'function' &&
x.handlers &&
x.handlers.constructor == HandlerSet);
}
function makeEventHandler(original) {
var handlers = new HandlerSet();
if (typeof original == 'function') {
handlers.addHandler(original);
}
// The event handler is a function, so it can be used with the DOM.
// But when it's called, we apply all the handlers in the set.
var result = function() {
handlers.applyAll(this, arguments);
};
// We also expose its handler set so we can get at it later.
result.handlers = handlers;
return result;
}
// =============================================================================
// Module: Behavior
// =============================================================================
var Behavior = {
registry : new Array,
register : function(sheet) {
Behavior.registry.push(sheet);
},
registerEventHandlers : function(element, handlers) {
for (var event in handlers) {
if (!isEventHandler(element[event])) {
element[event] = makeEventHandler(element[event]);
}
element[event].handlers.addHandler(handlers[event]);
}
},
apply : function() {
for (var i = 0; i < Behavior.registry.length; i++) {
var sheet = Behavior.registry[i];
for (var selector in sheet) {
var list = document.getElementsBySelector(selector);
if (!list) {
continue;
}
for (var j = 0; j < list.length; j++) {
Behavior.registerEventHandlers(list[j], sheet[selector]);
}
}
}
},
addLoadHandler : function(handler) {
var oldHandler = window.onload;
if (typeof oldHandler != 'function') {
window.onload = handler;
}
else {
window.onload = function() {
oldHandler();
handler();
};
}
}
};
Behavior.addLoadHandler(function() { Behavior.apply(); });
To use create the snippets use the following structure:
<pre class="codediv"><img src="/images/codeclicker.gif?x61720" class="codeclicker" border="0" /> <!-- put your snippet content here --> </pre>
Don’t forget to create the “codeclicker.gif” that will be put on folder “images” in your WordPress installation folder (use bloginfo(‘wpurl’); ) the image height should be 20px (if more the image will be hidden since its overflow the “pre” tag)
Note: I tried to add changing the background color using CSS “background-color = “#bbbbbb”;” on the onclick event handler, but somehow it prevents the script running. Any idea? I also have yet to be able to slowly scroll the snippet box. Again, any idea??
Thank you for reading. Critics and comments are welcome 🙂
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About Hardono
Hi, I'm Hardono. I am working as a Software Developer. I am working mostly in Windows, dealing with .NET, conversing in C#. But I know a bit of Linux, mainly because I need to keep this blog operational. I've been working in Logistics/Transport industry for more than 11 years.
great ! easy ! thanks for share ! go on !