Add a view for attachment previews

index.html

@@ -156,10 +156,8 @@
           </form>
         </script>
         <script type='text/x-tmpl-mustache' id='attachment-preview'>
-            <div class="imageAttachment">
-                <img src="{{ source }}" class="preview" />
-                <div class="close">x</div>
-            </div>
+              <img src="{{ source }}" class="preview" />
+              <div class="close">x</div>
         </script>
         <script type='text/x-tmpl-mustache' id='file-size-modal'>
             <div id="modal" class="modal-wrapper">
@@ -192,6 +190,7 @@
         <script type="text/javascript" src="js/chromium.js"></script>
         <script type="text/javascript" src="js/views/notifications.js"></script>
         <script type="text/javascript" src="js/views/file_modal_view.js"></script>
+        <script type="text/javascript" src="js/views/attachment_preview_view.js"></script>
         <script type="text/javascript" src="js/views/file_input_view.js"></script>
         <script type="text/javascript" src="js/views/list_view.js"></script>
         <script type="text/javascript" src="js/views/new_group_update_view.js"></script>

js/views/attachment_preview_view.js

@@ -0,0 +1,31 @@
+/* vim: ts=4:sw=4:expandtab
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+var Whisper = Whisper || {};
+
+(function () {
+    'use strict';
+    Whisper.AttachmentPreviewView = Backbone.View.extend({
+        className: 'imageAttachment',
+        initialize: function() {
+            this.template = $('#attachment-preview').html();
+            Mustache.parse(this.template);
+        },
+        render: function() {
+            this.$el.html(Mustache.render(this.template, {source: this.src}));
+            return this;
+        }
+    });
+})();

js/views/file_input_view.js

@@ -23,6 +23,7 @@ var Whisper = Whisper || {};
         initialize: function() {
             this.$input = this.$el.find('input[type=file]');
             this.modal = new Whisper.ModalView({el: $('#file-modal')});
+            this.thumb = new Whisper.AttachmentPreviewView();
         },
 
         events: {
@@ -31,9 +32,8 @@ var Whisper = Whisper || {};
         },
 
         addThumb: function(e) {
-            var attachmentPreview = $('#attachment-preview').html();
-            Mustache.parse(attachmentPreview);
-            this.$el.append($(Mustache.render(attachmentPreview, {source: e.target.result})));
+            this.thumb.src = e.target.result;
+            this.$el.append(this.thumb.render().el);
         },
 
         previewImages: function() {
@@ -76,7 +76,7 @@ var Whisper = Whisper || {};
         },
 
         clearForm: function() {
-            this.$el.find('div.imageAttachment').remove();
+            this.thumb.remove();
         },
 
         deleteFiles: function() {