deac/jquery
1
0
Fork 0
Code Issues Pull requests Releases Wiki Activity

Added a new liveQuery/event delegation hybrid method: .live and .die. Easily adapts event delegation to the jQuery style. $("div").live("click", fn); $("div > #foo").live("submit", fn); $("div").die("click");

Browse source
This commit is contained in:
John Resig 2008-12-22 04:59:34 +00:00
parent 67ded9a36a
commit c03a280155
2 changed files with 141 additions and 21 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

96
src/event.js
View file

@ -53,12 +53,15 @@ jQuery.event = {
// jQuery(...).bind("mouseover mouseout", fn);
jQuery.each(types.split(/\s+/), function(index, type) {
// Namespaced event handlers
var parts = type.split(".");
type = parts.shift();
handler.type = parts.sort().join(".");
var namespaces = type.split(".");
type = namespaces.shift();
handler.type = namespaces.slice().sort().join(".");
// Get the current list of functions bound to this event
var handlers = events[type];
if ( jQuery.event.specialAll[type] )
jQuery.event.specialAll[type].setup.call(elem, data, namespaces);
// Init the event handler queue
if (!handlers) {
@ -67,7 +70,7 @@ jQuery.event = {
// Check for a special event handler
// Only use addEventListener/attachEvent if the special
// events handler returns false
if ( !jQuery.event.special[type] || jQuery.event.special[type].setup.call(elem,data) === false ) {
if ( !jQuery.event.special[type] || jQuery.event.special[type].setup.call(elem, data, namespaces) === false ) {
// Bind the global event handler to the element
if (elem.addEventListener)
elem.addEventListener(type, handle, false);
@ -114,9 +117,9 @@ jQuery.event = {
// jQuery(...).unbind("mouseover mouseout", fn);
jQuery.each(types.split(/\s+/), function(index, type){
// Namespaced event handlers
var namespace = type.split(".");
type = namespace.shift();
namespace = RegExp("(^|\\.)" + namespace.sort().join(".*\\.") + "(\\.|$)");
var namespaces = type.split(".");
type = namespaces.shift();
var namespace = RegExp("(^|\\.)" + namespaces.slice().sort().join(".*\\.") + "(\\.|$)");
if ( events[type] ) {
// remove the given handler for the given type
@ -129,11 +132,14 @@ jQuery.event = {
// Handle the removal of namespaced events
if ( namespace.test(events[type][handler].type) )
delete events[type][handler];
if ( jQuery.event.specialAll[type] )
jQuery.event.specialAll[type].teardown.call(elem, namespaces);
// remove generic event handler if no more handlers exist
for ( ret in events[type] ) break;
if ( !ret ) {
if ( !jQuery.event.special[type] || jQuery.event.special[type].teardown.call(elem) === false ) {
if ( !jQuery.event.special[type] || jQuery.event.special[type].teardown.call(elem, namespaces) === false ) {
if (elem.removeEventListener)
elem.removeEventListener(type, jQuery.data(elem, "handle"), false);
else if (elem.detachEvent)
@ -157,7 +163,7 @@ jQuery.event = {
}
},
trigger: function(type, data, elem, donative, extra) {
trigger: function(type, data, elem, donative, extra, dohandlers) {
// Clone the incoming data, if any
data = jQuery.makeArray(data);
@ -203,14 +209,16 @@ jQuery.event = {
if ( exclusive )
data[0].exclusive = true;
// Trigger the event, it is assumed that "handle" is a function
var handle = jQuery.data(elem, "handle");
if ( handle )
val = handle.apply( elem, data );
if ( dohandlers !== false ) {
// Trigger the event, it is assumed that "handle" is a function
var handle = jQuery.data(elem, "handle");
if ( handle )
val = handle.apply( elem, data );
// Handle triggering native .onfoo handlers (and on links since we don't call .click() for links)
if ( (!fn || (jQuery.nodeName(elem, 'a') && type == "click")) && elem["on"+type] && elem["on"+type].apply( elem, data ) === false )
val = false;
// Handle triggering native .onfoo handlers (and on links since we don't call .click() for links)
if ( (!fn || (jQuery.nodeName(elem, 'a') && type == "click")) && elem["on"+type] && elem["on"+type].apply( elem, data ) === false )
val = false;
}
if ( donative !== false && val !== false ) {
var parent = elem.parentNode || elem.ownerDocument;
@ -248,18 +256,18 @@ jQuery.event = {
handle: function(event) {
// returned undefined or false
var val, ret, namespace, all, handlers;
var val, ret, all, handlers;
event = arguments[0] = jQuery.event.fix( event || window.event );
// Namespaced event handlers
namespace = event.type.split(".");
event.type = namespace.shift();
var namespaces = event.type.split(".");
event.type = namespaces.shift();
// Cache this now, all = true means, any handler
all = !namespace.length && !event.exclusive;
all = !namespaces.length && !event.exclusive;
namespace = RegExp("(^|\\.)" + namespace.sort().join(".*\\.") + "(\\.|$)");
var namespace = RegExp("(^|\\.)" + namespaces.slice().sort().join(".*\\.") + "(\\.|$)");
handlers = ( jQuery.data(this, "events") || {} )[event.type];
@ -381,6 +389,27 @@ jQuery.event = {
setup: bindReady,
teardown: function() {}
}
},
specialAll: {
live: {
setup: function( selector, namespaces ){
jQuery.event.add( this, namespaces[0], liveHandler );
},
teardown: function( namespaces ){
if ( namespaces.length ) {
var remove = 0, name = RegExp("(^|\\.)" + namespaces[0] + "(\\.|$)");
jQuery.each( (jQuery.data(this, "events").live || {}), function(){
if ( name.test(this.type) )
remove++;
});
if ( remove <= 1 )
jQuery.event.remove( this, namespaces[0], liveHandler );
}
}
}
}
};
@ -493,9 +522,34 @@ jQuery.fn.extend({
jQuery.readyList.push( function() { return fn.call(this, jQuery); } );
return this;
},
live: function( type, fn ){
jQuery(document).bind( liveConvert(type, this.selector), this.selector, fn );
return this;
},
die: function( type, fn ){
jQuery(document).unbind( liveConvert(type, this.selector), fn );
return this;
}
});
function liveHandler( event ){
var check = RegExp("(^|\\.)" + event.type + "(\\.|$)");
jQuery.each(jQuery.data(this, "events").live || [], function(i, fn){
if ( check.test(fn.type) ) {
var elem = jQuery(event.target).closest(fn.data)[0];
if ( elem )
jQuery.event.trigger( event.type, fn.data, elem, false, fn, false );
}
});
}
function liveConvert(type, selector){
return ["live", type, selector.replace(/\./g, "_")].join(".");
}
jQuery.extend({
isReady: false,
readyList: [],

66
test/unit/event.js
View file

@ -418,6 +418,72 @@ test("toggle(Function, Function, ...)", function() {
var data = jQuery.data( $div[0], 'events' );
ok( !data, "Unbinding one function from toggle unbinds them all");
});
test(".live()/.die()", function() {
expect(28);
var submit = 0, div = 0, livea = 0, liveb = 0;
jQuery("div").live("submit", function(){ submit++; return false; });
jQuery("div").live("click", function(){ div++; });
jQuery("div#nothiddendiv").live("click", function(){ livea++; });
jQuery("div#nothiddendivchild").live("click", function(){ liveb++; });
// Nothing should trigger on the body
jQuery("body").trigger("click");
equals( submit, 0, "Click on body" );
equals( div, 0, "Click on body" );
equals( livea, 0, "Click on body" );
equals( liveb, 0, "Click on body" );
// This should trigger two events
jQuery("div#nothiddendiv").trigger("click");
equals( submit, 0, "Click on div" );
equals( div, 1, "Click on div" );
equals( livea, 1, "Click on div" );
equals( liveb, 0, "Click on div" );
// This should trigger three events (w/ bubbling)
jQuery("div#nothiddendivchild").trigger("click");
equals( submit, 0, "Click on inner div" );
equals( div, 2, "Click on inner div" );
equals( livea, 2, "Click on inner div" );
equals( liveb, 1, "Click on inner div" );
// This should trigger one submit
jQuery("div#nothiddendivchild").trigger("submit");
equals( submit, 1, "Submit on div" );
equals( div, 2, "Submit on div" );
equals( livea, 2, "Submit on div" );
equals( liveb, 1, "Submit on div" );
// Make sure no other events were removed in the process
jQuery("div#nothiddendivchild").trigger("click");
equals( submit, 1, "die Click on inner div" );
equals( div, 3, "die Click on inner div" );
equals( livea, 3, "die Click on inner div" );
equals( liveb, 2, "die Click on inner div" );
// Now make sure that the removal works
jQuery("div#nothiddendivchild").die("click");
jQuery("div#nothiddendivchild").trigger("click");
equals( submit, 1, "die Click on inner div" );
equals( div, 4, "die Click on inner div" );
equals( livea, 4, "die Click on inner div" );
equals( liveb, 2, "die Click on inner div" );
// Make sure that the click wasn't removed too early
jQuery("div#nothiddendiv").trigger("click");
equals( submit, 1, "die Click on inner div" );
equals( div, 5, "die Click on inner div" );
equals( livea, 5, "die Click on inner div" );
equals( liveb, 2, "die Click on inner div" );
jQuery("div#nothiddendiv").die("click");
jQuery("div").die("click");
jQuery("div").die("submit");
});
/*
test("jQuery(function($) {})", function() {
stop();