feat(web): show available shortcuts (#3342)

* feat(web): show available shortcuts

* pr feeback

* feat: new shortcut for deselect

* fix: remove new shortcut

* responsive

web/src/lib/components/photos-page/asset-grid.svelte

@@ -30,6 +30,7 @@
   import { goto } from '$app/navigation';
   import { browser } from '$app/environment';
   import { isSearchEnabled } from '$lib/stores/search.store';
+  import ShowShortcuts from '../shared-components/show-shortcuts.svelte';
 
   export let user: UserResponseDto | undefined = undefined;
   export let isAlbumSelectionMode = false;
@@ -39,6 +40,7 @@
   let viewportWidth = 0;
   let assetGridElement: HTMLElement;
   let bucketInfo: AssetCountByTimeBucketResponseDto;
+  let showShortcuts = false;
 
   const onKeyboardPress = (event: KeyboardEvent) => handleKeyboardPress(event);
 
@@ -93,6 +95,9 @@
 
     if (!$isViewingAssetStoreState) {
       switch (event.key) {
+        case '?':
+          if (event.shiftKey) showShortcuts = !showShortcuts;
+          return;
         case '/':
           goto(AppRoute.EXPLORE);
           return;
@@ -290,6 +295,10 @@
 
 <svelte:window on:keydown={onKeyDown} on:keyup={onKeyUp} on:selectstart={onSelectStart} />
 
+{#if showShortcuts}
+  <ShowShortcuts on:close={() => (showShortcuts = !showShortcuts)} />
+{/if}
+
 {#if bucketInfo && viewportHeight && $assetGridState.timelineHeight > viewportHeight}
   <Scrollbar
     scrollbarHeight={viewportHeight}

web/src/lib/components/shared-components/show-shortcuts.svelte

@@ -0,0 +1,79 @@
+<script lang="ts">
+  import Close from 'svelte-material-icons/Close.svelte';
+  import CircleIconButton from '../elements/buttons/circle-icon-button.svelte';
+  import { createEventDispatcher } from 'svelte';
+
+  const shortcuts = {
+    general: [
+      { key: ['←', '→'], action: 'Previous or next photo' },
+      { key: ['Esc'], action: 'Back, close, or deselect' },
+      { key: ['/'], action: 'Search your photos' },
+    ],
+    actions: [
+      { key: ['f'], action: 'Favorite or unfavorite photo' },
+      { key: ['i'], action: 'Show or hide info' },
+      { key: ['⇧', 'a'], action: 'Archive or unarchive photo' },
+      { key: ['⇧', 'd'], action: 'Download' },
+      { key: ['Space'], action: 'Play or pause video' },
+      { key: ['Del'], action: 'Delete Asset' },
+    ],
+  };
+  const dispatch = createEventDispatcher();
+</script>
+
+<div class="absolute z-[99999] h-full w-full">
+  <div class="flex h-full w-full place-content-center place-items-center overflow-hidden bg-black/50">
+    <div
+      class="w-[400px] max-w-[125vw] rounded-3xl border bg-immich-bg shadow-sm dark:border-immich-dark-gray dark:bg-immich-dark-gray dark:text-immich-dark-fg md:w-[650px]"
+    >
+      <div class="relative px-4 pt-4">
+        <h1 class="px-4 py-4 font-medium text-immich-primary dark:text-immich-dark-primary">Keyboard Shortcuts</h1>
+        <div class="absolute inset-y-0 right-0 px-4 py-4">
+          <CircleIconButton logo={Close} on:click={() => dispatch('close')} />
+        </div>
+      </div>
+
+      <div class="grid grid-cols-1 gap-4 px-4 pb-4 md:grid-cols-2">
+        <div class="px-4 py-4">
+          <h2>General</h2>
+          <div class="text-sm">
+            {#each shortcuts.general as shortcut}
+              <div class="grid grid-cols-[20%_80%] items-center gap-4 pt-4 text-sm">
+                <div class="flex justify-self-end">
+                  {#each shortcut.key as key}
+                    <p
+                      class="mr-1 flex items-center justify-center justify-self-end rounded-lg bg-immich-primary/25 p-2"
+                    >
+                      {key}
+                    </p>
+                  {/each}
+                </div>
+                <p class="mb-1 mt-1 flex">{shortcut.action}</p>
+              </div>
+            {/each}
+          </div>
+        </div>
+
+        <div class="px-4 py-4">
+          <h2>Actions</h2>
+          <div class="text-sm">
+            {#each shortcuts.actions as shortcut}
+              <div class="grid grid-cols-[20%_80%] items-center gap-4 pt-4 text-sm">
+                <div class="flex justify-self-end">
+                  {#each shortcut.key as key}
+                    <p
+                      class="mr-1 flex items-center justify-center justify-self-end rounded-lg bg-immich-primary/25 p-2"
+                    >
+                      {key}
+                    </p>
+                  {/each}
+                </div>
+                <p class="mb-1 mt-1 flex">{shortcut.action}</p>
+              </div>
+            {/each}
+          </div>
+        </div>
+      </div>
+    </div>
+  </div>
+</div>