Make sure touch events arrive in correct order.

lib/wire/seqqueue.js

@@ -0,0 +1,26 @@
+function SeqQueue() {
+  this.queue = []
+  this.seq = 0
+}
+
+SeqQueue.prototype.push = function(seq, handler) {
+  this.queue[seq] = handler
+  this.maybeDequeue()
+}
+
+SeqQueue.prototype.done = function(seq, handler) {
+  this.queue[seq] = handler
+  this.maybeDequeue()
+}
+
+SeqQueue.prototype.maybeDequeue = function() {
+  var handler
+
+  while ((handler = this.queue[this.seq])) {
+    this.queue[this.seq] = void 0
+    handler()
+    this.seq += 1
+  }
+}
+
+module.exports = SeqQueue