From ae295659d0585593adde88db2e98aedec601eabd Mon Sep 17 00:00:00 2001
From: David Greenspan <dgreenspan@alum.mit.edu>
Date: Tue, 25 Jun 2013 12:13:42 -0700
Subject: [PATCH] lookup searches up for "data" arg

try `{{> content}}` instead of `body`
---
 examples/unfinished/shark/client/shark.html | 10 ++++++++--
 packages/ui/component.js                    | 21 +++++++++++++++++----
 2 files changed, 25 insertions(+), 6 deletions(-)

diff --git a/examples/unfinished/shark/client/shark.html b/examples/unfinished/shark/client/shark.html
index de88785a8b..a690789fc4 100644
--- a/examples/unfinished/shark/client/shark.html
+++ b/examples/unfinished/shark/client/shark.html
@@ -7,7 +7,9 @@
 <h1>Hello {{name}}</h1>
 
 {{#each items}}
-  <div>{{text}}</div>
+  {{#divwrap}}
+    <div>{{text}}</div>
+  {{/divwrap}}
 {{else}}
   <strong>Empty</strong>
 {{/each}}
@@ -17,5 +19,9 @@
 </body>
 
 <template name="twice">
-{{> body foo=123}} {{{middle}}} {{> body foo=456}}
+{{> content foo=123}} {{{middle}}} {{> content foo=456}}
+</template>
+
+<template name="divwrap">
+<div>{{> content}}</div>
 </template>
diff --git a/packages/ui/component.js b/packages/ui/component.js
index 6d72e0f48b..6c3fce100e 100644
--- a/packages/ui/component.js
+++ b/packages/ui/component.js
@@ -516,7 +516,6 @@ _.extend(Component.prototype, {
 
     var result = null;
     var thisToBind = null;
-    var data;
 
     // XXX figure out what this should really do,
     // and how custom component classes should
@@ -531,14 +530,28 @@ _.extend(Component.prototype, {
       result = If;
     } else if (id === 'each') {
       result = Each;
+    } else if (id === 'content') {
+      return self.lookup('body'); // XXX hack for trying `content`
     } else if (id in global) {
       result = global[id];
       thisToBind = self.getArg('data') || null;
     } else if ((result = self.getArg(id))) {
       thisToBind = self;
-    } else if ((data = self.getArg('data'))) {
-      thisToBind = data;
-      result = data[id];
+    } else {
+      // look for data arg, maybe in parent.  stop as
+      // soon as we find a non-null value.
+      var comp = self;
+      var data = self.getArg('data');
+      // `== null` means null or undefined
+      while (data == null && comp.parent) {
+        comp = comp.parent;
+        data = comp.getArg('data');
+      }
+
+      if (data != null) {
+        thisToBind = data;
+        result = data[id];
+      }
     }
 
     if (thisToBind &&