[extensions-web] js: Support partials automatically in the templates framework

[Jasper St. Pierre <jstpierre src gnome org>]

commit c77a2539113e0577acab812e5cb5762d53184fdb
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Fri Mar 30 18:33:50 2012 -0400

    js: Support partials automatically in the templates framework
    
    This requires a modification to mustache to support compiled templates
    as partials. This is tracked upstream at:
    
    https://github.com/janl/mustache.js/pull/191

 sweettooth/static/js/mustache.js  |    8 +++++++-
 sweettooth/static/js/templates.js |   26 +++++++++++++++++++-------
 2 files changed, 26 insertions(+), 8 deletions(-)
---
diff --git a/sweettooth/static/js/mustache.js b/sweettooth/static/js/mustache.js
index 641cebd..9c61671 100644
--- a/sweettooth/static/js/mustache.js
+++ b/sweettooth/static/js/mustache.js
@@ -476,7 +476,7 @@ var Mustache = (typeof module !== "undefined" && module.exports) || {};
     // This anonymous function wraps the generated function so we can do
     // argument coercion, setup some variables, and handle any errors
     // encountered while executing it.
-    return function (view, partials) {
+    var template = function (view, partials) {
       partials = partials || {};
 
       var stack = [view]; // context stack
@@ -487,6 +487,8 @@ var Mustache = (typeof module !== "undefined" && module.exports) || {};
         throw debug(e.error, template, e.line, options.file);
       }
     };
+    template.compiled = true;
+    return template;
   }
 
   // Cache of pre-compiled templates.
@@ -511,6 +513,10 @@ var Mustache = (typeof module !== "undefined" && module.exports) || {};
   function compile(template, options) {
     options = options || {};
 
+    if (typeof template === "function" && template.compiled) {
+      return template;
+    }
+
     // Use a pre-compiled version from the cache if we have one.
     if (options.cache !== false) {
       if (!_cache[template]) {
diff --git a/sweettooth/static/js/templates.js b/sweettooth/static/js/templates.js
index 2081ace..3e9cbb6 100644
--- a/sweettooth/static/js/templates.js
+++ b/sweettooth/static/js/templates.js
@@ -2,24 +2,36 @@
 
 define(['templates/templatedata', 'mustache'], function(templatedata) {
     var module = {};
+    var partials = module._P = {};
     module._T = templatedata;
 
     function compile(template) {
         // We have our own template caching, don't use Mustache's.
-        return Mustache.compile(v, { cache: false });
+        var compiled = Mustache.compile(template, { cache: false });
+        var wrapper = function(view) {
+            return compiled(view, partials);
+        };
+        wrapper.compiled = true;
+        return wrapper;
     }
 
-    function _compileTemplateData(data, out) {
+    function _compileTemplateData(data, out, prefix) {
         for (var propname in data) {
-            var v = data[propname];
-            if (typeof(v) === typeof({}))
-                out[propname] = _compileTemplateData(v, {});
+            var v = data[propname], pkey;
+            if (prefix)
+                pkey = prefix + "." + propname;
             else
-                out[propname] = compile(v);
+                pkey = propname;
+
+            if (typeof(v) === typeof({})) {
+                out[propname] = _compileTemplateData(v, {}, pkey);
+            } else {
+                out[propname] = partials[pkey] = compile(v);
+            }
         }
         return out;
     }
 
-    _compileTemplateData(templatedata, module);
+    _compileTemplateData(templatedata, module, "");
     return module;
 });