github/backbone
1
1
Fork 0
mirror of https://github.com/jashkenas/backbone.git synced 2026-04-30 03:00:06 -04:00
Code Issues Packages Projects Releases Wiki Activity

(hopefully) simplifying and optimizing 'trigger' further

Browse Source
This commit is contained in:
Jeremy Ashkenas
2012-12-12 13:25:08 -05:00
parent ac94b84c56
commit 644aecc487
1 changed files with 30 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files

52
backbone.js
View File

@@ -69,7 +69,7 @@
// Implement multiple event names `"change blur"` and jQuery-style event maps
// `{change: action}` in terms of the existing API.
function eventsApi(obj, action, name, rest) {
var eventsApi = function(obj, action, name, rest) {
if (!name) return true;
if (typeof name === 'object') {
for (var key in name) {
@@ -77,13 +77,34 @@
}
} else if (eventSplitter.test(name)) {
var names = name.split(eventSplitter);
for (var i = 0, l = names.length; i < l; ++i) {
for (var i = 0, l = names.length; i < l; i++) {
obj[action].apply(obj, [names[i]].concat(rest));
}
} else {
return true;
}
}
};
// Optimized internal dispatch function for triggering events. Tries to
// keep the usual cases speedy.
var triggerEvents = function(obj, events, args) {
for (var i = 0, l = events.length; i < l; i++) {
var ev = events[i], cb = ev.cb, context = ev.context || obj;
switch (args.length) {
case 0:
cb.call(context);
break;
case 1:
cb.call(context, args[0]);
break;
case 2:
cb.call(context, args[0], args[1]);
break;
default:
cb.apply(context, args);
}
}
};
// A module that can be mixed in to *any object* in order to provide it with
// custom events. You may bind with `on` or remove with `off` callback
@@ -168,25 +189,12 @@
// receive the true name of the event as the first argument).
trigger: function(name) {
if (!this._events) return this;
var i, l;
if (eventSplitter.test(name)) {
eventsApi(this, 'trigger', name, slice.call(arguments, 1));
} else {
var events = this._events[name];
var allEvents = this._events.all;
var rest = slice.call(arguments, 1);
if (events) {
for (i = 0, l = events.length; i < l; ++i) {
events[i].cb.apply(events[i].context || this, rest);
}
}
if (allEvents) {
rest = [name].concat(rest);
for (i = 0, l = allEvents.length; i < l; ++i) {
allEvents[i].cb.apply(allEvents[i].context || this, rest);
}
}
}
var args = slice.call(arguments, 1);
if (!eventsApi(this, 'trigger', name, args)) return this;
var events = this._events[name];
var allEvents = this._events.all;
if (events) triggerEvents(this, events, args);
if (allEvents) triggerEvents(this, allEvents, arguments);
return this;
},