github/backbone
1
1
Fork 0
mirror of https://github.com/jashkenas/backbone.git synced 2026-01-23 05:48:10 -05:00
Code Issues Packages Projects Releases Wiki Activity

Documentation for Backbone.Events

Browse Source
This commit is contained in:
Brad Dunbar
2012-01-13 17:16:05 -05:00
parent 34e0f7fb26
commit 920d047145
1 changed files with 7 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
backbone.js
View File

@@ -75,8 +75,11 @@
on : function(events, callback, context) {
var ev;
events = events.split(/\s+/);
var calls = this._callbacks || (this._callbacks = {});
while (ev = events.shift()) {
var calls = this._callbacks || (this._callbacks = {});
// Create an immutable callback list, allowing traversal during
// modification. The tail is an empty object that will always be used
// as the next node.
var list = calls[ev] || (calls[ev] = {});
var tail = list.tail || (list.tail = list.next = {});
tail.callback = callback;
@@ -99,6 +102,7 @@
node = calls[ev];
delete calls[ev];
if (!callback || !node) continue;
// Create a new list, omitting the indicated event/context pairs.
while ((node = node.next) && node.next) {
if (node.callback === callback &&
(!context || node.context === context)) continue;
@@ -118,11 +122,13 @@
events.unshift('all');
events.push(null);
if (!(calls = this._callbacks)) return this;
// Save references to the current head, tail, & args.
while (event = events.shift()) {
if (!(node = calls[event])) continue;
args = event == 'all' ? arguments : slice.call(arguments, 1);
events.push({next: node.next, tail: node.tail, args: args});
}
// Traverse each list, stopping when the saved tail is reached.
while (node = events.pop()) {
tail = node.tail;
args = node.args;