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Size: 1.4 KB
Versions: 25
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Stored size: 1.4 KB
Contents
d3.dispatch = function() {
var dispatch = new d3_dispatch(),
i = -1,
n = arguments.length;
while (++i < n) dispatch[arguments[i]] = d3_dispatch_event();
return dispatch;
};
function d3_dispatch() {}
d3_dispatch.prototype.on = function(type, listener) {
var i = type.indexOf("."),
name = "";
// Extract optional namespace, e.g., "click.foo"
if (i > 0) {
name = type.substring(i + 1);
type = type.substring(0, i);
}
return arguments.length < 2
? this[type].on(name)
: (this[type].on(name, listener), this);
};
function d3_dispatch_event() {
var listeners = [],
listenerByName = {};
function dispatch() {
var z = listeners, // defensive reference
i = -1,
n = z.length,
l;
while (++i < n) if (l = z[i].on) l.apply(this, arguments);
}
dispatch.on = function(name, listener) {
var l, i;
// return the current listener, if any
if (arguments.length < 2) return (l = listenerByName[name]) && l.on;
// remove the old listener, if any (with copy-on-write)
if (l = listenerByName[name]) {
l.on = null;
listeners = listeners.slice(0, i = listeners.indexOf(l)).concat(listeners.slice(i + 1));
delete listenerByName[name];
}
// add the new listener, if any
if (listener) {
listeners.push(listenerByName[name] = {on: listener});
}
return dispatch;
};
return dispatch;
};
Version data entries
25 entries across 25 versions & 1 rubygems