From 90b06ef22f5e2237b622d8086f2995fee15139f7 Mon Sep 17 00:00:00 2001
From: Dermot Duffy <dermot.duffy@gmail.com>
Date: Sat, 9 Apr 2022 09:59:11 -0700
Subject: [PATCH] Only show gallery back button in certain cases.

---
 src/browse-media-util.ts   |  1 -
 src/components/gallery.ts  | 14 +++++++++++++-
 src/components/timeline.ts |  1 -
 3 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/src/browse-media-util.ts b/src/browse-media-util.ts
index a3d647d2..381053a8 100644
--- a/src/browse-media-util.ts
+++ b/src/browse-media-util.ts
@@ -239,7 +239,6 @@ export class BrowseMediaUtil {
     view
       .evolve({
         target: parent,
-        previous: view,
       })
       .dispatchChangeEvent(node);
   }
diff --git a/src/components/gallery.ts b/src/components/gallery.ts
index 69a5d871..b83c8382 100644
--- a/src/components/gallery.ts
+++ b/src/components/gallery.ts
@@ -129,6 +129,18 @@ export class FrigateCardGalleryCore extends LitElement {
     );
   }
 
+  /**
+   * Determine whether the back arrow should be displayed.
+   * @returns `true` if the back arrow should be displayed, `false` otherwise.
+   */
+  protected _showBackArrow(): boolean {
+    return (
+      !!this.view?.previous &&
+      !!this.view.previous.target &&
+      this.view.previous.view === this.view.view
+    );
+  }
+
   /**
    * Master render method.
    * @returns A rendered template.
@@ -158,7 +170,7 @@ export class FrigateCardGalleryCore extends LitElement {
     };
 
     return html` <ul class="mdc-image-list frigate-card-gallery">
-      ${this.view && this.view.previous
+      ${this._showBackArrow()
         ? html`<li class="mdc-image-list__item" style="${styleMap(itemStyle)}">
             <div class="mdc-image-list__image-aspect-container">
               <div class="mdc-image-list__image">
diff --git a/src/components/timeline.ts b/src/components/timeline.ts
index f25471b6..9ba61044 100644
--- a/src/components/timeline.ts
+++ b/src/components/timeline.ts
@@ -1,4 +1,3 @@
-// TODO: Hover over an event should show something useful.
 // TODO: Periodically refetch events.
 // TODO: Editor support for timeline (incl. in views).
 // TODO: Make thumbnail controls optional (in all places that use thumbnails).