Added timeline scrollTop action, added to status_list_container, scrollable_list

(previously removed, adding back now)

app/javascript/gabsocial/actions/timelines.js

@@ -7,6 +7,7 @@ export const TIMELINE_DELETE  = 'TIMELINE_DELETE';
 export const TIMELINE_CLEAR   = 'TIMELINE_CLEAR';
 export const TIMELINE_UPDATE_QUEUE = 'TIMELINE_UPDATE_QUEUE';
 export const TIMELINE_DEQUEUE = 'TIMELINE_DEQUEUE';
+export const TIMELINE_SCROLL_TOP = 'TIMELINE_SCROLL_TOP';
 
 export const TIMELINE_EXPAND_REQUEST = 'TIMELINE_EXPAND_REQUEST';
 export const TIMELINE_EXPAND_SUCCESS = 'TIMELINE_EXPAND_SUCCESS';
@@ -210,3 +211,11 @@ export function disconnectTimeline(timeline) {
     timeline,
   };
 };
+
+export function scrollTopTimeline(timeline, top) {
+  return {
+    type: TIMELINE_SCROLL_TOP,
+    timeline,
+    top,
+  };
+};

app/javascript/gabsocial/components/scrollable_list.js

@@ -26,6 +26,8 @@ export default class ScrollableList extends PureComponent {
     alwaysPrepend: PropTypes.bool,
     emptyMessage: PropTypes.node,
     children: PropTypes.node,
+    onScrollToTop: PropTypes.func,
+    onScroll: PropTypes.func,
   };
 
   state = {

app/javascript/gabsocial/features/ui/containers/status_list_container.js

@@ -5,6 +5,7 @@ import { createSelector } from 'reselect';
 import { debounce } from 'lodash';
 import { me } from '../../../initial_state';
 import { dequeueTimeline } from 'gabsocial/actions/timelines';
+import { scrollTopTimeline } from '../../../actions/timelines';
 
 const makeGetStatusIds = () => createSelector([
   (state, { type }) => state.getIn(['settings', type], ImmutableMap()),
@@ -45,6 +46,12 @@ const mapDispatchToProps = (dispatch, ownProps) => ({
   onDequeueTimeline(timelineId) {
     dispatch(dequeueTimeline(timelineId, ownProps.onLoadMore));
   },
+  onScrollToTop: debounce(() => {
+    dispatch(scrollTopTimeline(ownProps.timelineId, true));
+  }, 100),
+  onScroll: debounce(() => {
+    dispatch(scrollTopTimeline(ownProps.timelineId, false));
+  }, 100),
 });
 
 export default connect(mapStateToProps, mapDispatchToProps)(StatusList);

app/javascript/gabsocial/reducers/timelines.js

@@ -10,6 +10,7 @@ import {
   TIMELINE_UPDATE_QUEUE,
   TIMELINE_DEQUEUE,
   MAX_QUEUED_ITEMS,
+  TIMELINE_SCROLL_TOP,
 } from '../actions/timelines';
 import {
   ACCOUNT_BLOCK_SUCCESS,
@@ -137,6 +138,13 @@ const filterTimelines = (state, relationship, statuses) => {
   return state;
 };
 
+const updateTop = (state, timeline, top) => {
+  return state.update(timeline, initialTimeline, map => map.withMutations(mMap => {
+    if (top) mMap.set('unread', 0);
+    mMap.set('top', top);
+  }));
+};
+
 const filterTimeline = (timeline, state, relationship, statuses) =>
   state.updateIn([timeline, 'items'], ImmutableList(), list =>
     list.filterNot(statusId =>
@@ -171,6 +179,8 @@ export default function timelines(state = initialState, action) {
     return filterTimeline('home', state, action.relationship, action.statuses);
   case TIMELINE_CONNECT:
     return state.update(action.timeline, initialTimeline, map => map.set('online', true));
+  case TIMELINE_SCROLL_TOP:
+    return updateTop(state, action.timeline, action.top);
   case TIMELINE_DISCONNECT:
     return state.update(
       action.timeline,