Add local setting toggle to move media attachments outside CWs

Fixes #1812

app/javascript/flavours/glitch/features/local_settings/page/index.js

@@ -303,6 +303,15 @@ class LocalSettingsPage extends React.PureComponent {
     ({ intl, onChange, settings }) => (
       <div className='glitch local-settings__page content_warnings'>
         <h1><FormattedMessage id='settings.content_warnings' defaultMessage='Content warnings' /></h1>
+        <LocalSettingsPageItem
+          settings={settings}
+          item={['content_warnings', 'media_outside']}
+          id='mastodon-settings--content_warnings-media_outside'
+          onChange={onChange}
+        >
+          <FormattedMessage id='settings.content_warnings_media_outside' defaultMessage='Display media attachments outside content warnings' />
+          <span className='hint'><FormattedMessage id='settings.content_warnings_media_outside_hint' defaultMessage='Reproduce upstream Mastodon behavior by having the Content Warning toggle not affect media attachments' /></span>
+        </LocalSettingsPageItem>
         <DeprecatedLocalSettingsPageItem
           id='mastodon-settings--content_warnings-auto_unfold'
           value={expandSpoilers}

app/javascript/flavours/glitch/features/status/components/detailed_status.js

@@ -122,14 +122,27 @@ class DetailedStatus extends ImmutablePureComponent {
       return null;
     }
 
-    let media           = [];
-    let mediaIcons      = [];
     let applicationLink = '';
     let reblogLink = '';
     let reblogIcon = 'retweet';
     let favouriteLink = '';
     let edited = '';
 
+    //  Depending on user settings, some media are considered as parts of the
+    //  contents (affected by CW) while other will be displayed outside of the
+    //  CW.
+    let contentMedia = [];
+    let contentMediaIcons = [];
+    let extraMedia = [];
+    let extraMediaIcons = [];
+    let media = contentMedia;
+    let mediaIcons = contentMediaIcons;
+
+    if (settings.getIn(['content_warnings', 'media_outside'])) {
+      media = extraMedia;
+      mediaIcons = extraMediaIcons;
+    }
+
     if (this.props.measureHeight) {
       outerStyle.height = `${this.state.height}px`;
     }
@@ -199,8 +212,8 @@ class DetailedStatus extends ImmutablePureComponent {
     }
 
     if (status.get('poll')) {
-      media.push(<PollContainer pollId={status.get('poll')} />);
-      mediaIcons.push('tasks');
+      contentMedia.push(<PollContainer pollId={status.get('poll')} />);
+      contentMediaIcons.push('tasks');
     }
 
     if (status.get('application')) {
@@ -282,8 +295,8 @@ class DetailedStatus extends ImmutablePureComponent {
 
           <StatusContent
             status={status}
-            media={media}
-            mediaIcons={mediaIcons}
+            media={contentMedia}
+            mediaIcons={contentMediaIcons}
             expanded={expanded}
             collapsed={false}
             onExpandedToggle={onToggleHidden}
@@ -294,6 +307,8 @@ class DetailedStatus extends ImmutablePureComponent {
             disabled
           />
 
+          {extraMedia}
+
           <div className='detailed-status__meta'>
             <a className='detailed-status__datetime' href={status.get('url')} target='_blank' rel='noopener noreferrer'>
               <FormattedDate value={new Date(status.get('created_at'))} hour12={false} year='numeric' month='short' day='2-digit' hour='2-digit' minute='2-digit' />