Add simple compiled in template support.

r2/r2/lib/js.py

@@ -196,6 +196,25 @@ class DataSource(Source):
         return []
 
 
+class TemplateFileSource(DataSource, FileSource):
+    """A JavaScript template file on disk."""
+    def __init__(self, name, wrap="r.templates.set({content})"):
+        DataSource.__init__(self, wrap)
+        FileSource.__init__(self, name)
+        self.name = name
+
+    def get_content(self):
+        from r2.lib.static import locate_static_file
+        name, style = os.path.splitext(self.name)
+        path = locate_static_file(os.path.join('static/js', self.name))
+        with open(path) as f:
+            return [{
+                "name": name,
+                "style": style.lstrip('.'),
+                "template": f.read()
+            }]
+
+
 class StringsSource(DataSource):
     """A virtual source consisting of localized strings from r2.lib.strings."""
     def __init__(self, lang=None, keys=None, wrap="r.strings.set({content})"):
@@ -345,6 +364,7 @@ module["reddit"] = LocalizedModule("reddit.js",
     "lib/jquery.cookie.js",
     "lib/jquery.url.js",
     "lib/backbone-0.9.10.js",
+    "templates.js",
     "utils.js",
     "ui.js",
     "login.js",

r2/r2/public/static/js/templates.js

@@ -0,0 +1,59 @@
+r.templating = {}
+
+r.templating.TemplateSet = function() {
+    this.index = {}
+}
+r.templating.TemplateSet.prototype = {
+    _templateSettings: {
+        variable: 'thing'
+    },
+
+    _key: function(name, style) {
+        return name + '.' + style
+    },
+
+    _create: function(templateData) {
+        return _.template(templateData, null, this._templateSettings)
+    },
+
+    set: function(templates) {
+        _.each(templates, function(tplInfo) {
+            var key = this._key(tplInfo.name, tplInfo.style)
+            this.index[key] = tplInfo.template
+        }, this)
+    },
+
+    _defaultStyle: function(nameAndStyle) {
+        // `nameAndStyle` can be an array of [name, style] or simply a name,
+        // defaulting the style to r.config.renderstyle.
+        if (!_.isArray(nameAndStyle)) {
+            nameAndStyle = [nameAndStyle, r.config.renderstyle]
+        }
+        return nameAndStyle
+    },
+
+    get: function(nameAndStyle) {
+        nameAndStyle = this._defaultStyle(nameAndStyle)
+        var key = this._key(nameAndStyle[0], nameAndStyle[1])
+
+        if (!this.index[key]) {
+            throw '"' + nameAndStyle[0] + '.' + nameAndStyle[1] + '"' + ' template not found.'
+        }
+
+        template = this.index[key]
+        if (!_.isFunction(template)) {
+            template = this.index[key] = this._create(template)
+        }
+        return template
+    },
+
+    make: function(nameAndStyle, data, parentEl) {
+        html = this.get(nameAndStyle)(data)
+        if (parentEl) {
+            $(parentEl).append(html)
+        }
+        return html
+    }
+}
+
+r.templates = new r.templating.TemplateSet()