Change single-column mode to scroll the whole page (#11359)

Fix #10840

app/javascript/mastodon/components/scrollable_list.js

@@ -35,6 +35,7 @@ export default class ScrollableList extends PureComponent {
     alwaysPrepend: PropTypes.bool,
     emptyMessage: PropTypes.node,
     children: PropTypes.node,
+    bindToDocument: PropTypes.bool,
   };
 
   static defaultProps = {
@@ -50,7 +51,9 @@ export default class ScrollableList extends PureComponent {
 
   handleScroll = throttle(() => {
     if (this.node) {
-      const { scrollTop, scrollHeight, clientHeight } = this.node;
+      const scrollTop = this.getScrollTop();
+      const scrollHeight = this.getScrollHeight();
+      const clientHeight = this.getClientHeight();
       const offset = scrollHeight - scrollTop - clientHeight;
 
       if (400 > offset && this.props.onLoadMore && this.props.hasMore && !this.props.isLoading) {
@@ -80,10 +83,15 @@ export default class ScrollableList extends PureComponent {
   scrollToTopOnMouseIdle = false;
 
   setScrollTop = newScrollTop => {
-    if (this.node.scrollTop !== newScrollTop) {
+    if (this.getScrollTop() !== newScrollTop) {
       this.lastScrollWasSynthetic = true;
+
+      if (this.props.bindToDocument) {
+        document.scrollingElement.scrollTop = newScrollTop;
+      } else {
         this.node.scrollTop = newScrollTop;
       }
+    }
   };
 
   clearMouseIdleTimer = () => {
@@ -100,7 +108,7 @@ export default class ScrollableList extends PureComponent {
     this.clearMouseIdleTimer();
     this.mouseIdleTimer = setTimeout(this.handleMouseIdle, MOUSE_IDLE_DELAY);
 
-    if (!this.mouseMovedRecently && this.node.scrollTop === 0) {
+    if (!this.mouseMovedRecently && this.getScrollTop() === 0) {
       // Only set if we just started moving and are scrolled to the top.
       this.scrollToTopOnMouseIdle = true;
     }
@@ -135,15 +143,27 @@ export default class ScrollableList extends PureComponent {
   }
 
   getScrollPosition = () => {
-    if (this.node && (this.node.scrollTop > 0 || this.mouseMovedRecently)) {
+    if (this.node && (this.getScrollTop() > 0 || this.mouseMovedRecently)) {
-      return { height: this.node.scrollHeight, top: this.node.scrollTop };
+      return { height: this.getScrollHeight(), top: this.getScrollTop() };
     } else {
       return null;
     }
   }
 
+  getScrollTop = () => {
+    return this.props.bindToDocument ? document.scrollingElement.scrollTop : this.node.scrollTop;
+  }
+
+  getScrollHeight = () => {
+    return this.props.bindToDocument ? document.scrollingElement.scrollHeight : this.node.scrollHeight;
+  }
+
+  getClientHeight = () => {
+    return this.props.bindToDocument ? document.scrollingElement.clientHeight : this.node.clientHeight;
+  }
+
   updateScrollBottom = (snapshot) => {
-    const newScrollTop = this.node.scrollHeight - snapshot;
+    const newScrollTop = this.getScrollHeight() - snapshot;
 
     this.setScrollTop(newScrollTop);
   }
@@ -153,8 +173,8 @@ export default class ScrollableList extends PureComponent {
       React.Children.count(prevProps.children) < React.Children.count(this.props.children) &&
       this.getFirstChildKey(prevProps) !== this.getFirstChildKey(this.props);
 
-    if (someItemInserted && (this.node.scrollTop > 0 || this.mouseMovedRecently)) {
+    if (someItemInserted && (this.getScrollTop() > 0 || this.mouseMovedRecently)) {
-      return this.node.scrollHeight - this.node.scrollTop;
+      return this.getScrollHeight() - this.getScrollTop();
     } else {
       return null;
     }
@@ -164,7 +184,7 @@ export default class ScrollableList extends PureComponent {
     // Reset the scroll position when a new child comes in in order not to
     // jerk the scrollbar around if you're already scrolled down the page.
     if (snapshot !== null) {
-      this.setScrollTop(this.node.scrollHeight - snapshot);
+      this.setScrollTop(this.getScrollHeight() - snapshot);
     }
   }
 
@@ -197,14 +217,24 @@ export default class ScrollableList extends PureComponent {
   }
 
   attachScrollListener () {
+    if (this.props.bindToDocument) {
+      document.addEventListener('scroll', this.handleScroll);
+      document.addEventListener('wheel', this.handleWheel);
+    } else {
       this.node.addEventListener('scroll', this.handleScroll);
       this.node.addEventListener('wheel', this.handleWheel);
     }
+  }
 
   detachScrollListener () {
+    if (this.props.bindToDocument) {
+      document.removeEventListener('scroll', this.handleScroll);
+      document.removeEventListener('wheel', this.handleWheel);
+    } else {
       this.node.removeEventListener('scroll', this.handleScroll);
       this.node.removeEventListener('wheel', this.handleWheel);
     }
+  }
 
   getFirstChildKey (props) {
     const { children } = props;

app/javascript/mastodon/containers/media_container.js

@@ -8,6 +8,7 @@ import Video from '../features/video';
 import Card from '../features/status/components/card';
 import Poll from 'mastodon/components/poll';
 import ModalRoot from '../components/modal_root';
+import { getScrollbarWidth } from '../features/ui/components/modal_root';
 import MediaModal from '../features/ui/components/media_modal';
 import { List as ImmutableList, fromJS } from 'immutable';
 
@@ -31,6 +32,8 @@ export default class MediaContainer extends PureComponent {
 
   handleOpenMedia = (media, index) => {
     document.body.classList.add('with-modals--active');
+    document.documentElement.style.marginRight = `${getScrollbarWidth()}px`;
+
     this.setState({ media, index });
   }
 
@@ -38,11 +41,15 @@ export default class MediaContainer extends PureComponent {
     const media = ImmutableList([video]);
 
     document.body.classList.add('with-modals--active');
+    document.documentElement.style.marginRight = `${getScrollbarWidth()}px`;
+
     this.setState({ media, time });
   }
 
   handleCloseMedia = () => {
     document.body.classList.remove('with-modals--active');
+    document.documentElement.style.marginRight = 0;
+
     this.setState({ media: null, index: null, time: null });
   }
 

app/javascript/mastodon/features/account_timeline/index.js

@@ -44,6 +44,7 @@ class AccountTimeline extends ImmutablePureComponent {
     withReplies: PropTypes.bool,
     blockedBy: PropTypes.bool,
     isAccount: PropTypes.bool,
+    multiColumn: PropTypes.bool,
   };
 
   componentWillMount () {
@@ -77,7 +78,7 @@ class AccountTimeline extends ImmutablePureComponent {
   }
 
   render () {
-    const { shouldUpdateScroll, statusIds, featuredStatusIds, isLoading, hasMore, blockedBy, isAccount } = this.props;
+    const { shouldUpdateScroll, statusIds, featuredStatusIds, isLoading, hasMore, blockedBy, isAccount, multiColumn } = this.props;
 
     if (!isAccount) {
       return (
@@ -112,6 +113,7 @@ class AccountTimeline extends ImmutablePureComponent {
           onLoadMore={this.handleLoadMore}
           shouldUpdateScroll={shouldUpdateScroll}
           emptyMessage={emptyMessage}
+          bindToDocument={!multiColumn}
         />
       </Column>
     );

app/javascript/mastodon/features/blocks/index.js

@@ -32,6 +32,7 @@ class Blocks extends ImmutablePureComponent {
     accountIds: ImmutablePropTypes.list,
     hasMore: PropTypes.bool,
     intl: PropTypes.object.isRequired,
+    multiColumn: PropTypes.bool,
   };
 
   componentWillMount () {
@@ -43,7 +44,7 @@ class Blocks extends ImmutablePureComponent {
   }, 300, { leading: true });
 
   render () {
-    const { intl, accountIds, shouldUpdateScroll, hasMore } = this.props;
+    const { intl, accountIds, shouldUpdateScroll, hasMore, multiColumn } = this.props;
 
     if (!accountIds) {
       return (
@@ -64,6 +65,7 @@ class Blocks extends ImmutablePureComponent {
           hasMore={hasMore}
           shouldUpdateScroll={shouldUpdateScroll}
           emptyMessage={emptyMessage}
+          bindToDocument={!multiColumn}
         >
           {accountIds.map(id =>
             <AccountContainer key={id} id={id} />

app/javascript/mastodon/features/community_timeline/index.js

@@ -126,6 +126,7 @@ class CommunityTimeline extends React.PureComponent {
           onLoadMore={this.handleLoadMore}
           emptyMessage={<FormattedMessage id='empty_column.community' defaultMessage='The local timeline is empty. Write something publicly to get the ball rolling!' />}
           shouldUpdateScroll={shouldUpdateScroll}
+          bindToDocument={!multiColumn}
         />
       </Column>
     );

app/javascript/mastodon/features/domain_blocks/index.js

@@ -33,6 +33,7 @@ class Blocks extends ImmutablePureComponent {
     hasMore: PropTypes.bool,
     domains: ImmutablePropTypes.orderedSet,
     intl: PropTypes.object.isRequired,
+    multiColumn: PropTypes.bool,
   };
 
   componentWillMount () {
@@ -44,7 +45,7 @@ class Blocks extends ImmutablePureComponent {
   }, 300, { leading: true });
 
   render () {
-    const { intl, domains, shouldUpdateScroll, hasMore } = this.props;
+    const { intl, domains, shouldUpdateScroll, hasMore, multiColumn } = this.props;
 
     if (!domains) {
       return (
@@ -65,6 +66,7 @@ class Blocks extends ImmutablePureComponent {
           hasMore={hasMore}
           shouldUpdateScroll={shouldUpdateScroll}
           emptyMessage={emptyMessage}
+          bindToDocument={!multiColumn}
         >
           {domains.map(domain =>
             <DomainContainer key={domain} domain={domain} />

app/javascript/mastodon/features/favourited_statuses/index.js

@@ -95,6 +95,7 @@ class Favourites extends ImmutablePureComponent {
           onLoadMore={this.handleLoadMore}
           shouldUpdateScroll={shouldUpdateScroll}
           emptyMessage={emptyMessage}
+          bindToDocument={!multiColumn}
         />
       </Column>
     );

app/javascript/mastodon/features/favourites/index.js

@@ -23,6 +23,7 @@ class Favourites extends ImmutablePureComponent {
     dispatch: PropTypes.func.isRequired,
     shouldUpdateScroll: PropTypes.func,
     accountIds: ImmutablePropTypes.list,
+    multiColumn: PropTypes.bool,
   };
 
   componentWillMount () {
@@ -36,7 +37,7 @@ class Favourites extends ImmutablePureComponent {
   }
 
   render () {
-    const { shouldUpdateScroll, accountIds } = this.props;
+    const { shouldUpdateScroll, accountIds, multiColumn } = this.props;
 
     if (!accountIds) {
       return (
@@ -56,6 +57,7 @@ class Favourites extends ImmutablePureComponent {
           scrollKey='favourites'
           shouldUpdateScroll={shouldUpdateScroll}
           emptyMessage={emptyMessage}
+          bindToDocument={!multiColumn}
         >
           {accountIds.map(id =>
             <AccountContainer key={id} id={id} withNote={false} />

app/javascript/mastodon/features/follow_requests/index.js

@@ -32,6 +32,7 @@ class FollowRequests extends ImmutablePureComponent {
     hasMore: PropTypes.bool,
     accountIds: ImmutablePropTypes.list,
     intl: PropTypes.object.isRequired,
+    multiColumn: PropTypes.bool,
   };
 
   componentWillMount () {
@@ -43,7 +44,7 @@ class FollowRequests extends ImmutablePureComponent {
   }, 300, { leading: true });
 
   render () {
-    const { intl, shouldUpdateScroll, accountIds, hasMore } = this.props;
+    const { intl, shouldUpdateScroll, accountIds, hasMore, multiColumn } = this.props;
 
     if (!accountIds) {
       return (
@@ -64,6 +65,7 @@ class FollowRequests extends ImmutablePureComponent {
           hasMore={hasMore}
           shouldUpdateScroll={shouldUpdateScroll}
           emptyMessage={emptyMessage}
+          bindToDocument={!multiColumn}
         >
           {accountIds.map(id =>
             <AccountAuthorizeContainer key={id} id={id} />

app/javascript/mastodon/features/followers/index.js

@@ -36,6 +36,7 @@ class Followers extends ImmutablePureComponent {
     hasMore: PropTypes.bool,
     blockedBy: PropTypes.bool,
     isAccount: PropTypes.bool,
+    multiColumn: PropTypes.bool,
   };
 
   componentWillMount () {
@@ -55,7 +56,7 @@ class Followers extends ImmutablePureComponent {
   }, 300, { leading: true });
 
   render () {
-    const { shouldUpdateScroll, accountIds, hasMore, blockedBy, isAccount } = this.props;
+    const { shouldUpdateScroll, accountIds, hasMore, blockedBy, isAccount, multiColumn } = this.props;
 
     if (!isAccount) {
       return (
@@ -87,6 +88,7 @@ class Followers extends ImmutablePureComponent {
           prepend={<HeaderContainer accountId={this.props.params.accountId} hideTabs />}
           alwaysPrepend
           emptyMessage={emptyMessage}
+          bindToDocument={!multiColumn}
         >
           {blockedBy ? [] : accountIds.map(id =>
             <AccountContainer key={id} id={id} withNote={false} />

app/javascript/mastodon/features/following/index.js

@@ -36,6 +36,7 @@ class Following extends ImmutablePureComponent {
     hasMore: PropTypes.bool,
     blockedBy: PropTypes.bool,
     isAccount: PropTypes.bool,
+    multiColumn: PropTypes.bool,
   };
 
   componentWillMount () {
@@ -55,7 +56,7 @@ class Following extends ImmutablePureComponent {
   }, 300, { leading: true });
 
   render () {
-    const { shouldUpdateScroll, accountIds, hasMore, blockedBy, isAccount } = this.props;
+    const { shouldUpdateScroll, accountIds, hasMore, blockedBy, isAccount, multiColumn } = this.props;
 
     if (!isAccount) {
       return (
@@ -87,6 +88,7 @@ class Following extends ImmutablePureComponent {
           prepend={<HeaderContainer accountId={this.props.params.accountId} hideTabs />}
           alwaysPrepend
           emptyMessage={emptyMessage}
+          bindToDocument={!multiColumn}
         >
           {blockedBy ? [] : accountIds.map(id =>
             <AccountContainer key={id} id={id} withNote={false} />

app/javascript/mastodon/features/hashtag_timeline/index.js

@@ -157,6 +157,7 @@ class HashtagTimeline extends React.PureComponent {
           onLoadMore={this.handleLoadMore}
           emptyMessage={<FormattedMessage id='empty_column.hashtag' defaultMessage='There is nothing in this hashtag yet.' />}
           shouldUpdateScroll={shouldUpdateScroll}
+          bindToDocument={!multiColumn}
         />
       </Column>
     );

app/javascript/mastodon/features/home_timeline/index.js

@@ -119,6 +119,7 @@ class HomeTimeline extends React.PureComponent {
           timelineId='home'
           emptyMessage={<FormattedMessage id='empty_column.home' defaultMessage='Your home timeline is empty! Visit {public} or use search to get started and meet other users.' values={{ public: <Link to='/timelines/public'><FormattedMessage id='empty_column.home.public_timeline' defaultMessage='the public timeline' /></Link> }} />}
           shouldUpdateScroll={shouldUpdateScroll}
+          bindToDocument={!multiColumn}
         />
       </Column>
     );

app/javascript/mastodon/features/list_timeline/index.js

@@ -184,6 +184,7 @@ class ListTimeline extends React.PureComponent {
           onLoadMore={this.handleLoadMore}
           emptyMessage={<FormattedMessage id='empty_column.list' defaultMessage='There is nothing in this list yet. When members of this list post new statuses, they will appear here.' />}
           shouldUpdateScroll={shouldUpdateScroll}
+          bindToDocument={!multiColumn}
         />
       </Column>
     );

app/javascript/mastodon/features/lists/index.js

@@ -40,6 +40,7 @@ class Lists extends ImmutablePureComponent {
     dispatch: PropTypes.func.isRequired,
     lists: ImmutablePropTypes.list,
     intl: PropTypes.object.isRequired,
+    multiColumn: PropTypes.bool,
   };
 
   componentWillMount () {
@@ -47,7 +48,7 @@ class Lists extends ImmutablePureComponent {
   }
 
   render () {
-    const { intl, shouldUpdateScroll, lists } = this.props;
+    const { intl, shouldUpdateScroll, lists, multiColumn } = this.props;
 
     if (!lists) {
       return (
@@ -70,6 +71,7 @@ class Lists extends ImmutablePureComponent {
           shouldUpdateScroll={shouldUpdateScroll}
           emptyMessage={emptyMessage}
           prepend={<ColumnSubheading text={intl.formatMessage(messages.subheading)} />}
+          bindToDocument={!multiColumn}
         >
           {lists.map(list =>
             <ColumnLink key={list.get('id')} to={`/timelines/list/${list.get('id')}`} icon='list-ul' text={list.get('title')} />

app/javascript/mastodon/features/mutes/index.js

@@ -32,6 +32,7 @@ class Mutes extends ImmutablePureComponent {
     hasMore: PropTypes.bool,
     accountIds: ImmutablePropTypes.list,
     intl: PropTypes.object.isRequired,
+    multiColumn: PropTypes.bool,
   };
 
   componentWillMount () {
@@ -43,7 +44,7 @@ class Mutes extends ImmutablePureComponent {
   }, 300, { leading: true });
 
   render () {
-    const { intl, shouldUpdateScroll, hasMore, accountIds } = this.props;
+    const { intl, shouldUpdateScroll, hasMore, accountIds, multiColumn } = this.props;
 
     if (!accountIds) {
       return (
@@ -64,6 +65,7 @@ class Mutes extends ImmutablePureComponent {
           hasMore={hasMore}
           shouldUpdateScroll={shouldUpdateScroll}
           emptyMessage={emptyMessage}
+          bindToDocument={!multiColumn}
         >
           {accountIds.map(id =>
             <AccountContainer key={id} id={id} />

app/javascript/mastodon/features/notifications/index.js

@@ -191,6 +191,7 @@ class Notifications extends React.PureComponent {
         onScrollToTop={this.handleScrollToTop}
         onScroll={this.handleScroll}
         shouldUpdateScroll={shouldUpdateScroll}
+        bindToDocument={!multiColumn}
       >
         {scrollableContent}
       </ScrollableList>

app/javascript/mastodon/features/pinned_statuses/index.js

@@ -28,6 +28,7 @@ class PinnedStatuses extends ImmutablePureComponent {
     statusIds: ImmutablePropTypes.list.isRequired,
     intl: PropTypes.object.isRequired,
     hasMore: PropTypes.bool.isRequired,
+    multiColumn: PropTypes.bool,
   };
 
   componentWillMount () {
@@ -43,7 +44,7 @@ class PinnedStatuses extends ImmutablePureComponent {
   }
 
   render () {
-    const { intl, shouldUpdateScroll, statusIds, hasMore } = this.props;
+    const { intl, shouldUpdateScroll, statusIds, hasMore, multiColumn } = this.props;
 
     return (
       <Column icon='thumb-tack' heading={intl.formatMessage(messages.heading)} ref={this.setRef}>
@@ -53,6 +54,7 @@ class PinnedStatuses extends ImmutablePureComponent {
           scrollKey='pinned_statuses'
           hasMore={hasMore}
           shouldUpdateScroll={shouldUpdateScroll}
+          bindToDocument={!multiColumn}
         />
       </Column>
     );

app/javascript/mastodon/features/public_timeline/index.js

@@ -126,6 +126,7 @@ class PublicTimeline extends React.PureComponent {
           scrollKey={`public_timeline-${columnId}`}
           emptyMessage={<FormattedMessage id='empty_column.public' defaultMessage='There is nothing here! Write something publicly, or manually follow users from other servers to fill it up' />}
           shouldUpdateScroll={shouldUpdateScroll}
+          bindToDocument={!multiColumn}
         />
       </Column>
     );

app/javascript/mastodon/features/reblogs/index.js

@@ -23,6 +23,7 @@ class Reblogs extends ImmutablePureComponent {
     dispatch: PropTypes.func.isRequired,
     shouldUpdateScroll: PropTypes.func,
     accountIds: ImmutablePropTypes.list,
+    multiColumn: PropTypes.bool,
   };
 
   componentWillMount () {
@@ -36,7 +37,7 @@ class Reblogs extends ImmutablePureComponent {
   }
 
   render () {
-    const { shouldUpdateScroll, accountIds } = this.props;
+    const { shouldUpdateScroll, accountIds, multiColumn } = this.props;
 
     if (!accountIds) {
       return (
@@ -56,6 +57,7 @@ class Reblogs extends ImmutablePureComponent {
           scrollKey='reblogs'
           shouldUpdateScroll={shouldUpdateScroll}
           emptyMessage={emptyMessage}
+          bindToDocument={!multiColumn}
         >
           {accountIds.map(id =>
             <AccountContainer key={id} id={id} withNote={false} />

app/javascript/mastodon/features/ui/components/modal_root.js

@@ -32,6 +32,28 @@ const MODAL_COMPONENTS = {
   'LIST_ADDER':ListAdder,
 };
 
+let cachedScrollbarWidth = null;
+
+export const getScrollbarWidth = () => {
+  if (cachedScrollbarWidth !== null) {
+    return cachedScrollbarWidth;
+  }
+
+  const outer = document.createElement('div');
+  outer.style.visibility = 'hidden';
+  outer.style.overflow = 'scroll';
+  document.body.appendChild(outer);
+
+  const inner = document.createElement('div');
+  outer.appendChild(inner);
+
+  const scrollbarWidth = outer.offsetWidth - inner.offsetWidth;
+  cachedScrollbarWidth = scrollbarWidth;
+  outer.parentNode.removeChild(outer);
+
+  return scrollbarWidth;
+};
+
 export default class ModalRoot extends React.PureComponent {
 
   static propTypes = {
@@ -47,8 +69,10 @@ export default class ModalRoot extends React.PureComponent {
   componentDidUpdate (prevProps, prevState, { visible }) {
     if (visible) {
       document.body.classList.add('with-modals--active');
+      document.documentElement.style.marginRight = `${getScrollbarWidth()}px`;
     } else {
       document.body.classList.remove('with-modals--active');
+      document.documentElement.style.marginRight = 0;
     }
   }
 

app/javascript/mastodon/features/ui/index.js

@@ -110,12 +110,25 @@ class SwitchingColumnsArea extends React.PureComponent {
 
   componentWillMount () {
     window.addEventListener('resize', this.handleResize, { passive: true });
+
+    if (this.state.mobile || forceSingleColumn) {
+      document.body.classList.toggle('layout-single-column', true);
+      document.body.classList.toggle('layout-multiple-columns', false);
+    } else {
+      document.body.classList.toggle('layout-single-column', false);
+      document.body.classList.toggle('layout-multiple-columns', true);
+    }
   }
 
-  componentDidUpdate (prevProps) {
+  componentDidUpdate (prevProps, prevState) {
     if (![this.props.location.pathname, '/'].includes(prevProps.location.pathname)) {
       this.node.handleChildrenContentChange();
     }
+
+    if (prevState.mobile !== this.state.mobile && !forceSingleColumn) {
+      document.body.classList.toggle('layout-single-column', this.state.mobile);
+      document.body.classList.toggle('layout-multiple-columns', !this.state.mobile);
+    }
   }
 
   componentWillUnmount () {

app/javascript/packs/public.js

@@ -108,14 +108,6 @@ function main() {
     if (parallaxComponents.length > 0 ) {
       new Rellax('.parallax', { speed: -1 });
     }
-
-    if (document.body.classList.contains('with-modals')) {
-      const scrollbarWidth = window.innerWidth - document.documentElement.clientWidth;
-      const scrollbarWidthStyle = document.createElement('style');
-      scrollbarWidthStyle.id = 'scrollbar-width';
-      document.head.appendChild(scrollbarWidthStyle);
-      scrollbarWidthStyle.sheet.insertRule(`body.with-modals--active { margin-right: ${scrollbarWidth}px; }`, 0);
-    }
   });
 
   delegate(document, '.webapp-btn', 'click', ({ target, button }) => {

app/javascript/styles/mastodon/basics.scss

@@ -8,7 +8,7 @@
 
 body {
   font-family: $font-sans-serif, sans-serif;
-  background: darken($ui-base-color, 8%);
+  background: darken($ui-base-color, 7%);
   font-size: 13px;
   line-height: 18px;
   font-weight: 400;
@@ -35,11 +35,19 @@ body {
   }
 
   &.app-body {
+    padding: 0;
+
+    &.layout-single-column {
+      height: auto;
+      min-height: 100%;
+      overflow-y: scroll;
+    }
+
+    &.layout-multiple-columns {
       position: absolute;
       width: 100%;
       height: 100%;
-    padding: 0;
+    }
-    background: $ui-base-color;
 
     &.with-modals--active {
       overflow-y: hidden;
@@ -56,7 +64,6 @@ body {
 
     &--active {
       overflow-y: hidden;
-      margin-right: 13px;
     }
   }
 
@@ -134,9 +141,22 @@ button {
   & > div {
     display: flex;
     width: 100%;
-    height: 100%;
     align-items: center;
     justify-content: center;
     outline: 0 !important;
   }
 }
+
+.layout-single-column .app-holder {
+  &,
+  & > div {
+    min-height: 100%;
+  }
+}
+
+.layout-multiple-columns .app-holder {
+  &,
+  & > div {
+    height: 100%;
+  }
+}

app/javascript/styles/mastodon/components.scss

@@ -1804,6 +1804,7 @@ a.account__display-name {
     justify-content: center;
     width: 100%;
     height: 100%;
+    min-height: 100vh;
 
     &__pane {
       height: 100%;
@@ -1817,6 +1818,7 @@ a.account__display-name {
       }
 
       &__inner {
+        position: fixed;
         width: 285px;
         pointer-events: auto;
         height: 100%;
@@ -1871,7 +1873,6 @@ a.account__display-name {
   flex-direction: column;
   width: 100%;
   height: 100%;
-  background: darken($ui-base-color, 7%);
 }
 
 .drawer {
@@ -2012,6 +2013,10 @@ a.account__display-name {
     top: 15px;
   }
 
+  .scrollable {
+    overflow: visible;
+  }
+
   @media screen and (min-width: $no-gap-breakpoint) {
     padding: 10px 0;
   }