Add email-preview cmp

layout/default/Component/EmailPreview/default.tpl

@@ -0,0 +1,5 @@
+<iframe class="htmlPreview" src="" width="100%" height="530" frameborder="1"></iframe>
+<hr />
+<pre>
+{$plainText}
+</pre>

library/CM/Component/EmailPreview.js

@@ -0,0 +1,14 @@
+/**
+ * @class CM_Component_EmailPreview
+ * @extends CM_Component_Abstract
+ */
+var CM_Component_EmailPreview = CM_Component_Abstract.extend({
+  _class: 'CM_Component_EmailPreview',
+
+  html: null,
+
+  ready: function() {
+    var $iframe = this.$('.htmlPreview');
+    $iframe.attr('src', 'data:text/html;charset=utf-8,' + encodeURI(this.html));
+  }
+});

library/CM/Component/EmailPreview.php

@@ -0,0 +1,21 @@
+<?php
+
+class CM_Component_EmailPreview extends CM_Component_Abstract {
+
+    public function checkAccessible(CM_Render $render) {
+    }
+
+    public function prepare() {
+        $email = $this->_params->get('email');
+        if (!$email instanceof CM_Mail) {
+            throw new CM_Exception_InvalidParam('Invalid `email` param');
+        }
+        $userDefault = $this->_getViewer();
+        $user = $this->_params->has('user') ? $this->_params->getUser('user') : $userDefault;
+
+        $render = new CM_Render(null, $user);
+        list($subject, $html, $plainText) = $render->render($email);
+        $this->setTplParam('plainText', $plainText);
+        $this->_setJsParam('html', $html);
+    }
+}