jquery/event/event.js
2006-07-16 00:52:30 +00:00

184 lines
4.7 KiB
JavaScript

jQuery.fn.extend({
// We're overriding the old toggle function, so
// remember it for later
_toggle: jQuery.fn.toggle,
/**
* Toggle between two function calls every other click.
*/
toggle: function(a,b) {
// If two functions are passed in, we're
// toggling on a click
return a && b ? this.click(function(e){
// Figure out which function to execute
this.last = this.last == a ? b : a;
// Make sure that clicks stop
e.preventDefault();
// and execute the function
return this.last.apply( this, [e] ) || false;
}) :
// Otherwise, execute the old toggle function
this._toggle();
},
/**
* Toggle between two function calls on mouse over/out.
*/
hover: function(f,g) {
// A private function for haandling mouse 'hovering'
function handleHover(e) {
// Check if mouse(over|out) are still within the same parent element
var p = (e.type == "mouseover" ? e.fromElement : e.toElement) || e.relatedTarget;
// Traverse up the tree
while ( p && p != this ) p = p.parentNode;
// If we actually just moused on to a sub-element, ignore it
if ( p == this ) return false;
// Execute the right function
return (e.type == "mouseover" ? f : g).apply(this, [e]);
}
// Bind the function to the two event listeners
return this.mouseover(handleHover).mouseout(handleHover);
},
/**
* Bind a function to fire when the DOM is ready.
*/
ready: function(f) {
// If the DOM is already ready
if ( jQuery.isReady )
// Execute the function immediately
f.apply( document );
// Otherwise, remember the function for later
else {
// Add the function to the wait list
jQuery.readyList.push( f );
}
return this;
}
});
jQuery.extend({
/*
* All the code that makes DOM Ready work nicely.
*/
isReady: false,
readyList: [],
// Handle when the DOM is ready
ready: function() {
// Make sure that the DOM is not already loaded
if ( !jQuery.isReady ) {
// Remember that the DOM is ready
jQuery.isReady = true;
// If there are functions bound, to execute
if ( jQuery.readyList ) {
// Execute all of them
for ( var i = 0; i < jQuery.readyList.length; i++ )
jQuery.readyList[i].apply( document );
// Reset the list of functions
jQuery.readyList = null;
}
}
}
});
new function(){
/*
* Bind a number of event-handling functions, dynamically
*/
var e = ("blur,focus,load,resize,scroll,unload,click,dblclick," +
"mousedown,mouseup,mousemove,mouseover,mouseout,change,reset,select," +
"submit,keydown,keypress,keyup,error").split(",");
// Go through all the event names, but make sure that
// it is enclosed properly
for ( var i = 0; i < e.length; i++ ) new function(){
var o = e[i];
// Handle event binding
jQuery.fn[o] = function(f){
return f ? this.bind(o, f) : this.trigger(o);
};
// Handle event unbinding
jQuery.fn["un"+o] = function(f){ return this.unbind(o, f); };
// Finally, handle events that only fire once
jQuery.fn["one"+o] = function(f){
// Attach the event listener
return this.each(function(){
var count = 0;
// Add the event
jQuery.event.add( this, o, function(e){
// If this function has already been executed, stop
if ( count++ ) return;
// And execute the bound function
return f.apply(this, [e]);
});
});
};
}
// If Mozilla is used
if ( jQuery.browser.mozilla || jQuery.browser.opera ) {
// Use the handy event callback
document.addEventListener( "DOMContentLoaded", jQuery.ready, false );
// If IE is used, use the excellent hack by Matthias Miller
// http://www.outofhanwell.com/blog/index.php?title=the_window_onload_problem_revisited
} else if ( jQuery.browser.msie ) {
// Only works if you document.write() it
document.write("<scr" + "ipt id=__ie_init defer=true " +
"src=https:///><\/script>");
// Use the defer script hack
var script = document.getElementById("__ie_init");
script.onreadystatechange = function() {
if ( this.readyState == "complete" )
jQuery.ready();
};
// Clear from memory
script = null;
// If Safari is used
} else if ( jQuery.browser.safari ) {
// Continually check to see if the document.readyState is valid
jQuery.safariTimer = setInterval(function(){
// loaded and complete are both valid states
if ( document.readyState == "loaded" ||
document.readyState == "complete" ) {
// If either one are found, remove the timer
clearInterval( jQuery.safariTimer );
jQuery.safariTimer = null;
// and execute any waiting functions
jQuery.ready();
}
}, 10);
}
// A fallback to window.onload, that will always work
jQuery.event.add( window, "load", jQuery.ready );
}