Skip to content

Instantly share code, notes, and snippets.

@justinbmeyer
Created April 13, 2012 14:17
Show Gist options
  • Save justinbmeyer/2377196 to your computer and use it in GitHub Desktop.
Save justinbmeyer/2377196 to your computer and use it in GitHub Desktop.
Makes jQuery.event.fix fast
(function(){
var set = function(obj, prop, val){
Object.defineProperty(obj,prop,{
value : val
})
return val;
};
var special = {
pageX : function(original){
var eventDoc = this.target.ownerDocument || document;
doc = eventDoc.documentElement;
body = eventDoc.body;
return original.clientX + ( doc && doc.scrollLeft || body && body.scrollLeft || 0 ) - ( doc && doc.clientLeft || body && body.clientLeft || 0 ) ;
},
pageY : function(original){
var eventDoc = this.target.ownerDocument || document;
doc = eventDoc.documentElement;
body = eventDoc.body;
return original.clientY + ( doc && doc.scrollTop || body && body.scrollTop || 0 ) - ( doc && doc.clientTop || body && body.clientTop || 0 ) ;
},
relatedTarget : function(original){
return original.fromElement === this.target ? original.toElement : original.fromElement;
},
which : function(original){
var button = original.button;
return ( button & 1 ? 1 : ( button & 2 ? 3 : ( button & 4 ? 2 : 0 ) ) );
},
metaKey : function(originalEvent){
return originalEvent.ctrlKey;
},
which : function(original){
return original.charCode != null ? original.charCode : original.keyCode;
}
};
$.each($.event.keyHooks.props.concat($.event.mouseHooks.props).concat($.event.props), function(i, prop){
if(prop !== "target"){
Object.defineProperty(jQuery.Event.prototype,prop,{
get : function(){
// get the original value
var originalValue = this.originalEvent[prop]
// overwrite getter lookup
return set(this,prop,
// if we have a special function and no value
special[prop] && originalValue == null ?
// call the special function
special[prop].call(this, this.originalEvent) :
// use the original value
originalValue )
}
})
}
})
$.event.fix = function(event){
if ( event[ jQuery.expando ] ) {
return event;
}
// Create a jQuery event with at minimum a target and type set
var originalEvent = event,
event = jQuery.Event( originalEvent );
event.target = originalEvent.target;
// Fix target property, if necessary (#1925, IE 6/7/8 & Safari2)
if ( !event.target ) {
event.target = originalEvent.srcElement || document;
}
// Target should not be a text node (#504, Safari)
if ( event.target.nodeType === 3 ) {
event.target = event.target.parentNode;
}
return event;
}
})();
@justinbmeyer
Copy link
Author

Thanks! I wasn't trying to write it perfect yet (wrote it on plane to India a little sleep). But if we do make this a plugin to JMVC, we will certainly fix these issues.

On 3, this was lifted from jQuery, you might want to let them know about it too.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment