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Fix some races due to promises completing after we've switched rooms

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Add a few isMounted() checks to promise handlers so that we don't end up
throwing NPEs.
This commit is contained in:
Richard van der Hoff 2016-01-08 12:03:45 +00:00
parent 8170288acb
commit 62cf34b58c
2 changed files with 18 additions and 5 deletions
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13
src/components/structures/RoomView.js
View file

@ -353,11 +353,14 @@ module.exports = React.createClass({
_paginateCompleted: function() {
debuglog("paginate complete");
this.setState({
room: MatrixClientPeg.get().getRoom(this.props.roomId)
});
// we might have switched rooms since the paginate started - just bin
// the results if so.
if (!this.isMounted()) return;
this.setState({paginating: false});
this.setState({
room: MatrixClientPeg.get().getRoom(this.props.roomId),
paginating: false,
});
},
onSearchResultsFillRequest: function(backwards) {
@ -535,7 +538,7 @@ module.exports = React.createClass({
return searchPromise.then(function(results) {
debuglog("search complete");
if (!self.state.searching || self.searchId != localSearchId) {
if (!this.isMounted() || !self.state.searching || self.searchId != localSearchId) {
console.error("Discarding stale search results");
return;
}

10
src/components/structures/ScrollPanel.js
View file

@ -158,6 +158,10 @@ module.exports = React.createClass({
// check the scroll state and send out backfill requests if necessary.
checkFillState: function() {
if (!this.isMounted()) {
return;
}
var sn = this._getScrollNode();
// if there is less than a screenful of messages above or below the
@ -346,6 +350,12 @@ module.exports = React.createClass({
* message panel.
*/
_getScrollNode: function() {
if (!this.isMounted()) {
// this shouldn't happen, but when it does, turn the NPE into
// something more meaningful.
throw new Error("ScrollPanel._getScrollNode called when unmounted");
}
var panel = ReactDOM.findDOMNode(this.refs.geminiPanel);
// If the gemini scrollbar is doing its thing, this will be a div within