Change how content warnings are displayed in notifications in web UI

app/javascript/mastodon/components/content_warning.tsx

@@ -0,0 +1,30 @@
+import { FormattedMessage } from 'react-intl';
+
+export const ContentWarning: React.FC<{
+  text: string;
+  expanded?: boolean;
+  onClick?: () => void;
+}> = ({ text, expanded, onClick }) => (
+  <div className='content-warning'>
+    <div className='content-warning__border' />
+
+    <div className='content-warning__body'>
+      <p>{text}</p>
+      <button className='link-button' onClick={onClick}>
+        {expanded ? (
+          <FormattedMessage
+            id='content_warning.hide'
+            defaultMessage='Hide post'
+          />
+        ) : (
+          <FormattedMessage
+            id='content_warning.show'
+            defaultMessage='Show anyway'
+          />
+        )}
+      </button>
+    </div>
+
+    <div className='content-warning__border' />
+  </div>
+);

app/javascript/mastodon/features/notifications_v2/components/embedded_status.tsx

@@ -1,4 +1,4 @@
-import { useCallback, useRef } from 'react';
+import { useCallback, useRef, useState } from 'react';
 
 import { FormattedMessage } from 'react-intl';
 
@@ -9,6 +9,7 @@ import type { List as ImmutableList, RecordOf } from 'immutable';
 import BarChart4BarsIcon from '@/material-icons/400-24px/bar_chart_4_bars.svg?react';
 import PhotoLibraryIcon from '@/material-icons/400-24px/photo_library.svg?react';
 import { Avatar } from 'mastodon/components/avatar';
+import { ContentWarning } from 'mastodon/components/content_warning';
 import { DisplayName } from 'mastodon/components/display_name';
 import { Icon } from 'mastodon/components/icon';
 import type { Status } from 'mastodon/models/status';
@@ -23,6 +24,7 @@ export const EmbeddedStatus: React.FC<{ statusId: string }> = ({
 }) => {
   const history = useHistory();
   const clickCoordinatesRef = useRef<[number, number] | null>();
+  const [expanded, setExpanded] = useState(false);
 
   const status = useAppSelector(
     (state) => state.statuses.get(statusId) as Status | undefined,
@@ -96,12 +98,17 @@ export const EmbeddedStatus: React.FC<{ statusId: string }> = ({
     [],
   );
 
+  const handleContentWarningClick = useCallback(() => {
+    setExpanded((v) => !v);
+  }, [setExpanded]);
+
   if (!status) {
     return null;
   }
 
   // Assign status attributes to variables with a forced type, as status is not yet properly typed
   const contentHtml = status.get('contentHtml') as string;
+  const contentWarning = status.get('spoiler_text') as string;
   const poll = status.get('poll');
   const language = status.get('language') as string;
   const mentions = status.get('mentions') as ImmutableList<Mention>;
@@ -124,12 +131,22 @@ export const EmbeddedStatus: React.FC<{ statusId: string }> = ({
         <DisplayName account={account} />
       </div>
 
+      {contentWarning && (
+        <ContentWarning
+          text={contentWarning}
+          onClick={handleContentWarningClick}
+          expanded={expanded}
+        />
+      )}
+
+      {(!contentWarning || expanded) && (
         <EmbeddedStatusContent
           className='notification-group__embedded-status__content reply-indicator__content translate'
           content={contentHtml}
           language={language}
           mentions={mentions}
         />
+      )}
 
       {(poll || mediaAttachmentsSize > 0) && (
         <div className='notification-group__embedded-status__attachments reply-indicator__attachments'>

app/javascript/mastodon/locales/en.json

@@ -193,6 +193,8 @@
   "confirmations.unfollow.confirm": "Unfollow",
   "confirmations.unfollow.message": "Are you sure you want to unfollow {name}?",
   "confirmations.unfollow.title": "Unfollow user?",
+  "content_warning.hide": "Hide post",
+  "content_warning.show": "Show anyway",
   "conversation.delete": "Delete conversation",
   "conversation.mark_as_read": "Mark as read",
   "conversation.open": "View conversation",

app/javascript/styles/mastodon/components.scss

@@ -10438,39 +10438,53 @@ noscript {
   }
 
   &__embedded-status {
+    display: flex;
+    flex-direction: column;
+    gap: 8px;
     cursor: pointer;
 
     &__account {
       display: flex;
       align-items: center;
       gap: 4px;
-      margin-bottom: 8px;
       color: $dark-text-color;
+      font-size: 15px;
+      line-height: 22px;
 
       bdi {
-        color: inherit;
+        color: $darker-text-color;
       }
     }
 
-    .account__avatar {
-      opacity: 0.5;
-    }
-
     &__content {
       display: -webkit-box;
       font-size: 15px;
       line-height: 22px;
-      color: $dark-text-color;
+      color: $darker-text-color;
       -webkit-line-clamp: 4;
       -webkit-box-orient: vertical;
       max-height: 4 * 22px;
       overflow: hidden;
 
+      p {
+        display: none;
+
+        &:first-child {
+          display: initial;
+        }
+      }
+
       p,
       a {
         color: inherit;
       }
     }
+
+    .reply-indicator__attachments {
+      font-size: 15px;
+      line-height: 22px;
+      color: $dark-text-color;
+    }
   }
 }
 
@@ -10740,3 +10754,45 @@ noscript {
     }
   }
 }
+
+.content-warning {
+  display: flex;
+  align-items: stretch;
+  gap: 8px;
+  background: rgba($ui-highlight-color, 0.05);
+  color: $secondary-text-color;
+  border-top: 1px solid;
+  border-bottom: 1px solid;
+  border-color: rgba($ui-highlight-color, 0.15);
+
+  &__body {
+    flex: 1 1 auto;
+    padding: 8px 0;
+    font-size: 15px;
+    line-height: 22px;
+
+    p {
+      margin-bottom: 8px;
+    }
+
+    .link-button {
+      font-size: inherit;
+      line-height: inherit;
+      font-weight: 500;
+    }
+  }
+
+  &__border {
+    background: url('../images/warning-stripes.svg') repeat-y;
+    width: 5px;
+    flex: 0 0 auto;
+
+    &:first-child {
+      border-start-start-radius: 4px;
+    }
+
+    &:last-child {
+      border-start-end-radius: 4px;
+    }
+  }
+}