Quick View: Space key opens quick view for image, video and audio in Download.

ui/file_manager/file_manager/foreground/elements/files_quick_view.js

Index: ui/file_manager/file_manager/foreground/elements/files_quick_view.js
diff --git a/ui/file_manager/file_manager/foreground/elements/files_quick_view.js b/ui/file_manager/file_manager/foreground/elements/files_quick_view.js
new file mode 100644
index 0000000000000000000000000000000000000000..539e4583b0231789e657fcc3870dfe04a409e640
--- /dev/null
+++ b/ui/file_manager/file_manager/foreground/elements/files_quick_view.js
@@ -0,0 +1,56 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+var FilesQuickView = Polymer({
+  is: 'files-quick-view',
+
+  properties: {
+    image: String,
+    video: String,
+    videoPoster: String,
+    audio: String,
+  },
+
+  listeners: {
+    'iron-overlay-closed': 'clear_',
+  },
+
+  setImageURL: function(url) {
+    this.clear_();
+    this.image = url;
+  },
+
+  setVideoURL: function(url) {
+    this.clear_();
+    this.video = url;
+  },
+
+  setAudioURL: function(url) {
+    this.clear_();
+    this.audio = url;
+  },
+
+  clear_: function() {
+    this.image = '';
+    this.video = '';
+    this.audio = '';
+  },
+
+  // Open the dialog.
+  open: function() {
+    if (!this.isOpened())
+      this.$.dialog.open();
+  },
+
+  close: function() {
+    if (this.isOpened())
+      this.$.dialog.close();
+  },
+
+  isOpened: function() {
+    // TODO(oka): This is a workaround to satisfy closure compiler.
+    // Update ['opened'] to .opened.
+    return (/** @type{Object} */ (this.$.dialog))['opened'];
+  },
+});