Execute 'after_render' filter when rendering with precompiled renderer

* Fix hexojs#1791

lib/theme/view.js

@@ -95,15 +95,24 @@ View.prototype._resolveLayout = function(name) {
 
 View.prototype._precompile = function() {
   var render = this._render;
-  var renderer = render.getRenderer(pathFn.extname(this.path));
+  var ctx = render.context;
+  var ext = pathFn.extname(this.path);
+  var renderer = render.getRenderer(ext);
   var data = {
     path: this.source,
     text: this.data._content
   };
 
   if (typeof renderer.compile === 'function') {
     var compiled = this._compiledSync = renderer.compile(data);
-    this._compiled = Promise.method(compiled);
+    this._compiled = Promise.method(function(locals) {
+      var result = compiled(locals);
+      var output = render.getOutput(ext) || ext;
+      return ctx.execFilter('after_render:' + output, result, {
+        context: ctx,
+        args: [data]
+      });
+    });
   } else {
     this._compiledSync = function(locals) {
       return render.renderSync(data, locals);