correctly notify when timelineSets get reset

lib/models/event-timeline-set.js

@@ -150,6 +150,8 @@ EventTimelineSet.prototype.replaceEventId = function(oldEventId, newEventId) {
  *
  * @param {string=} backPaginationToken   token for back-paginating the new timeline
  * @param {?bool} flush  Whether to flush the non-live timelines too.
+ *
+ * @fires module:client~MatrixClient#event:"Room.timelineReset"
  */
 EventTimelineSet.prototype.resetLiveTimeline = function(backPaginationToken, flush) {
     var newTimeline;
@@ -180,6 +182,8 @@ EventTimelineSet.prototype.resetLiveTimeline = function(backPaginationToken, flu
     // stuck without realising that they *can* back-paginate.
     newTimeline.setPaginationToken(backPaginationToken, EventTimeline.BACKWARDS);
 
+    this.emit("Room.timelineReset", this.room, this);
+
     this._liveTimeline = newTimeline;
 };
 
@@ -636,3 +640,16 @@ module.exports = EventTimelineSet;
  *   }
  * });
  */
+
+/**
+ * Fires whenever the live timeline in a room is reset.
+ *
+ * When we get a 'limited' sync (for example, after a network outage), we reset
+ * the live timeline to be empty before adding the recent events to the new
+ * timeline. This event is fired after the timeline is reset, and before the
+ * new events are added.
+ *
+ * @event module:client~MatrixClient#"Room.timelineReset"
+ * @param {Room} room The room whose live timeline was reset, if any
+ * @param {EventTimelineSet} timelineSet timelineSet room whose live timeline was reset
+ */

lib/models/room.js

@@ -196,13 +196,11 @@ Room.prototype.getLiveTimeline = function() {
 
 
 /**
- * Reset the live timeline, and start a new one.
+ * Reset the live timeline of all timelineSets, and start new ones.
  *
  * <p>This is used when /sync returns a 'limited' timeline.
  *
  * @param {string=} backPaginationToken   token for back-paginating the new timeline
- *
- * @fires module:client~MatrixClient#event:"Room.timelineReset"
  */
 Room.prototype.resetLiveTimeline = function(backPaginationToken) {
     for (var i = 0; i < this._timelineSets.length; i++) {
@@ -210,7 +208,6 @@ Room.prototype.resetLiveTimeline = function(backPaginationToken) {
     }
 
     this._fixUpLegacyTimelineFields();
-    this.emit("Room.timelineReset", this);
 };
 
 /**
@@ -464,7 +461,7 @@ Room.prototype.getOrCreateFilteredTimelineSet = function(filter) {
     }
     var opts = Object.assign({ filter: filter }, this._opts);
     var timelineSet = new EventTimelineSet(this, opts);
-    reEmit(this, timelineSet, ["Room.timeline"]);
+    reEmit(this, timelineSet, ["Room.timeline", "Room.timelineReset"]);
     this._filteredTimelineSets[filter.filterId] = timelineSet;
     this._timelineSets.push(timelineSet);
 
@@ -1321,18 +1318,6 @@ module.exports = Room;
  * });
  */
 
-/**
- * Fires whenever the live timeline in a room is reset.
- *
- * When we get a 'limited' sync (for example, after a network outage), we reset
- * the live timeline to be empty before adding the recent events to the new
- * timeline. This event is fired after the timeline is reset, and before the
- * new events are added.
- *
- * @event module:client~MatrixClient#"Room.timelineReset"
- * @param {Room} room The room whose live timeline was reset.
- */
-
 /**
  * Fires when the status of a transmitted event is updated.
  *