From 0054254aed8b6a188fb42b8c08224c85cd029b96 Mon Sep 17 00:00:00 2001
From: Tony Garnock-Jones <tonygarnockjones@gmail.com>
Date: Fri, 28 Feb 2014 09:46:21 -0500
Subject: [PATCH] Support scoped selection of jquery nodes; support
 cross-metalevel jquery

---
 jquery-driver.js | 31 +++++++++++++++++++++----------
 1 file changed, 21 insertions(+), 10 deletions(-)

diff --git a/jquery-driver.js b/jquery-driver.js
index aeee847..85eb9a8 100644
--- a/jquery-driver.js
+++ b/jquery-driver.js
@@ -1,35 +1,46 @@
 // JQuery event driver
 
-function spawnJQueryDriver() {
-    var d = new DemandMatcher(["jQuery", __, __, __]);
+function spawnJQueryDriver(baseSelector, metaLevel) {
+    metaLevel = metaLevel || 0;
+    var d = new DemandMatcher(["jQuery", __, __, __], metaLevel);
     d.onDemandIncrease = function (r) {
 	var selector = r.pattern[1];
 	var eventName = r.pattern[2];
-	World.spawn(new JQueryEventRouter(selector, eventName),
-		    [pub(["jQuery", selector, eventName, __]),
-		     pub(["jQuery", selector, eventName, __], 0, 1)]);
+	World.spawn(new JQueryEventRouter(baseSelector, selector, eventName, metaLevel),
+		    [pub(["jQuery", selector, eventName, __], metaLevel),
+		     pub(["jQuery", selector, eventName, __], metaLevel, 1)]);
     };
     World.spawn(d);
 }
 
-function JQueryEventRouter(selector, eventName) {
+function JQueryEventRouter(baseSelector, selector, eventName, metaLevel) {
     var self = this;
+    this.baseSelector = baseSelector || null;
     this.selector = selector;
     this.eventName = eventName;
+    this.metaLevel = metaLevel || 0;
     this.preventDefault = (this.eventName.charAt(0) !== "+");
     this.handler =
 	World.wrap(function (e) {
-	    World.send(["jQuery", self.selector, self.eventName, e]);
+	    World.send(["jQuery", self.selector, self.eventName, e], self.metaLevel);
 	    if (self.preventDefault) e.preventDefault();
 	    return !self.preventDefault;
 	});
-    $(this.selector).on(this.preventDefault ? this.eventName : this.eventName.substring(1),
-			this.handler);
+    this.computeNodes().on(this.preventDefault ? this.eventName : this.eventName.substring(1),
+			   this.handler);
 }
 
 JQueryEventRouter.prototype.handleEvent = function (e) {
     if (e.type === "routes" && e.routes.length === 0) {
-	$(this.selector).off(this.eventName, this.handler);
+	this.computeNodes().off(this.eventName, this.handler);
 	World.exit();
     }
 };
+
+JQueryEventRouter.prototype.computeNodes = function () {
+    if (this.baseSelector) {
+	return $(this.baseSelector).children(this.selector).addBack(this.selector);
+    } else {
+	return $(this.selector);
+    }
+};