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Control currently viewied event via RoomViewStore

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Fix for https://github.com/vector-im/riot-web/issues/4224

Due to the way `MatrixChat` does a state update when the `view_room` dispatch fires and a second update when `RoomViewStore` sends an update, the current event ID and room ID were becoming out of sync. The solution devised was to have the event ID managed by the `RoomViewStore` itself and do any defaulting there (for when we revisit a room that we saved scroll state for previously).

This required a few changes:
 - The addition of `update_scroll_state` in `RoomViewStore` allows the `RoomView` to save scroll state for a room before swapping to another one. Previously the caching of scroll state was done in `RoomView`.
 - The `view_room` dispatch now accepts an `event_id`, which dictates which event is supposed to be scrolled to in the `MessagePanel` when a new room is viewed. It also accepts `event_offset`, but currently, this isn't passed in by a dispatch in the app, but it is clobbered when loading the default position when an `event_id` isn't specified. Finally, `highlighted` was added to distinguish whether the initial event being scrolled to is also highlighted. This flag is also used by `viewRoom` in `MatrixChat` in order to decide whether to `notifyNewScreen` with the specified `event_id`.
This commit is contained in:
Luke Barnard 2017-06-08 14:17:49 +01:00
parent ea02d8841c
commit d3cf78ff5a
5 changed files with 109 additions and 78 deletions
Download patch file Download diff file Expand all files Collapse all files

93
src/components/structures/RoomView.js
View file

@ -83,36 +83,8 @@ module.exports = React.createClass({
// * invited us tovthe room
oobData: React.PropTypes.object,
// id of an event to jump to. If not given, will go to the end of the
// live timeline.
eventId: React.PropTypes.string,
// where to position the event given by eventId, in pixels from the
// bottom of the viewport. If not given, will try to put the event
// 1/3 of the way down the viewport.
eventPixelOffset: React.PropTypes.number,
// ID of an event to highlight. If undefined, no event will be highlighted.
// Typically this will either be the same as 'eventId', or undefined.
highlightedEventId: React.PropTypes.string,
// is the RightPanel collapsed?
collapsedRhs: React.PropTypes.bool,
// a map from room id to scroll state, which will be updated on unmount.
//
// If there is no special scroll state (ie, we are following the live
// timeline), the scroll state is null. Otherwise, it is an object with
// the following properties:
//
// focussedEvent: the ID of the 'focussed' event. Typically this is
// the last event fully visible in the viewport, though if we
// have done an explicit scroll to an explicit event, it will be
// that event.
//
// pixelOffset: the number of pixels the window is scrolled down
// from the focussedEvent.
scrollStateMap: React.PropTypes.object,
},
getInitialState: function() {
@ -180,13 +152,28 @@ module.exports = React.createClass({
if (this.unmounted) {
return;
}
this.setState({
const newState = {
roomId: RoomViewStore.getRoomId(),
roomAlias: RoomViewStore.getRoomAlias(),
roomLoading: RoomViewStore.isRoomLoading(),
roomLoadError: RoomViewStore.getRoomLoadError(),
joining: RoomViewStore.isJoining(),
}, () => {
eventId: RoomViewStore.getEventId(),
eventPixelOffset: RoomViewStore.getEventPixelOffset(),
isEventHighlighted: RoomViewStore.isEventHighlighted(),
};
if (this.state.eventId !== newState.eventId) {
newState.searchResults = null;
}
// Store the scroll state for the previous room so that we can return to this
// position when viewing this room in future.
if (this.state.roomId !== newState.roomId) {
this._updateScrollMap(this.state.roomId);
}
this.setState(newState, () => {
this._onHaveRoom();
this.onRoom(MatrixClientPeg.get().getRoom(this.state.roomId));
});
@ -287,13 +274,6 @@ module.exports = React.createClass({
}
},
componentWillReceiveProps: function(newProps) {
if (newProps.eventId != this.props.eventId) {
// when we change focussed event id, hide the search results.
this.setState({searchResults: null});
}
},
shouldComponentUpdate: function(nextProps, nextState) {
return (!ObjectUtils.shallowEqual(this.props, nextProps) ||
!ObjectUtils.shallowEqual(this.state, nextState));
@ -319,7 +299,7 @@ module.exports = React.createClass({
this.unmounted = true;
// update the scroll map before we get unmounted
this._updateScrollMap();
this._updateScrollMap(this.state.roomId);
if (this.refs.roomView) {
// disconnect the D&D event listeners from the room view. This
@ -598,6 +578,14 @@ module.exports = React.createClass({
});
},
_updateScrollMap(roomId) {
dis.dispatch({
action: 'update_scroll_state',
room_id: roomId,
scroll_state: this._getScrollState(),
});
},
onRoom: function(room) {
if (!room || room.roomId !== this.state.roomId) {
return;
@ -1240,21 +1228,6 @@ module.exports = React.createClass({
}
},
// update scrollStateMap on unmount
_updateScrollMap: function() {
if (!this.state.room) {
// we were instantiated on a room alias and haven't yet joined the room.
return;
}
if (!this.props.scrollStateMap) return;
var roomId = this.state.room.roomId;
var state = this._getScrollState();
this.props.scrollStateMap[roomId] = state;
},
// get the current scroll position of the room, so that it can be
// restored when we switch back to it.
//
@ -1677,6 +1650,14 @@ module.exports = React.createClass({
hideMessagePanel = true;
}
const shouldHighlight = this.state.isEventHighlighted;
let highlightedEventId = null;
if (this.state.forwardingEvent) {
highlightedEventId = this.state.forwardingEvent.getId();
} else if (shouldHighlight) {
highlightedEventId = this.state.eventId;
}
// console.log("ShowUrlPreview for %s is %s", this.state.room.roomId, this.state.showUrlPreview);
var messagePanel = (
<TimelinePanel ref={this._gatherTimelinePanelRef}
@ -1684,9 +1665,9 @@ module.exports = React.createClass({
manageReadReceipts={!UserSettingsStore.getSyncedSetting('hideReadReceipts', false)}
manageReadMarkers={true}
hidden={hideMessagePanel}
highlightedEventId={this.state.forwardingEvent ? this.state.forwardingEvent.getId() : this.props.highlightedEventId}
eventId={this.props.eventId}
eventPixelOffset={this.props.eventPixelOffset}
highlightedEventId={highlightedEventId}
eventId={this.state.eventId}
eventPixelOffset={this.state.eventPixelOffset}
onScroll={ this.onMessageListScroll }
onReadMarkerUpdated={ this._updateTopUnreadMessagesBar }
showUrlPreview = { this.state.showUrlPreview }