/* | |
Behaviour v1.0 by Ben Nolan, June 2005. Based largely on the work | |
of Simon Willison (see comments by Simon below). | |
Description: | |
Uses css selectors to apply javascript behaviours to enable | |
unobtrusive javascript in html documents. | |
Usage: | |
var myrules = { | |
'b.someclass' : function(element){ | |
element.onclick = function(){ | |
alert(this.innerHTML); | |
} | |
}, | |
'#someid u' : function(element){ | |
element.onmouseover = function(){ | |
this.innerHTML = "BLAH!"; | |
} | |
} | |
); | |
Behaviour.register(myrules); | |
// Call Behaviour.apply() to re-apply the rules (if you | |
// update the dom, etc). | |
License: | |
My stuff is BSD licensed. Not sure about Simon's. | |
More information: | |
http://ripcord.co.nz/behaviour/ | |
*/ | |
var Behaviour = { | |
list : new Array, | |
register : function(sheet){ | |
Behaviour.list.push(sheet); | |
}, | |
start : function(){ | |
Behaviour.addLoadEvent(function(){ | |
Behaviour.apply(); | |
}); | |
}, | |
apply : function(){ | |
for (h=0;sheet=Behaviour.list[h];h++){ | |
for (selector in sheet){ | |
list = document.getElementsBySelector(selector); | |
if (!list){ | |
continue; | |
} | |
for (i=0;element=list[i];i++){ | |
sheet[selector](element); | |
} | |
} | |
} | |
}, | |
addLoadEvent : function(func){ | |
var oldonload = window.onload; | |
if (typeof window.onload != 'function') { | |
window.onload = func; | |
} else { | |
window.onload = function() { | |
oldonload(); | |
func(); | |
} | |
} | |
} | |
} | |
Behaviour.start(); | |
/* | |
The following code is Copyright (C) Simon Willison 2004. | |
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 (!currentContext[0]){ | |
return; | |
} | |
// 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 | |
*/ |