Queue.prototype.add = function(tasks) {
var op, item, task, ref;
this.cumulative = this.cumulative || 0;
while (tasks.length) {
item = tasks.shift();
op = Object.keys(item).reduce(Task.deriveOp, "");
this.cumulative += item[op];
// For the last task, ensure that an "end" event is
// emitted after the final callback is called.
if (tasks.length === 0) {
task = item.task;
item.task = temporald => {
task.call(this, temporald);
// Emit the end event _from_ within the _last_ task
// defined in the Queue tasks. Use the |tasks| array
// object as the access key.
this.emit("end", temporald);
// Reset on last one in the queue
this.cumulative = 0;
};
}
if (op === "loop" && tasks.length === 0) {
// When transitioning from a "delay" to a "loop", allow
// the loop to iterate the amount of time given,
// but still start at the correct offset.
ref = exportable.delay(this.cumulative - item[op], () => {
ref = exportable.loop(item[op], item.task);
this.refs.push(ref);
});
} else {
ref = exportable[op](this.cumulative, item.task);
}
this.refs.push(ref);
}
};