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Merge pull request #902 from matrix-org/dbkr/prevent_illegal_finddomnode

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Prevent an exception getting scroll node
This commit is contained in:
David Baker 2017-05-18 17:56:29 +01:00 committed by GitHub
commit 726cd60127
1 changed files with 9 additions and 0 deletions
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9
src/components/views/rooms/RoomList.js
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@ -50,6 +50,8 @@ module.exports = React.createClass({
},
componentWillMount: function() {
this.mounted = false;
var cli = MatrixClientPeg.get();
cli.on("Room", this.onRoom);
cli.on("deleteRoom", this.onDeleteRoom);
@ -69,6 +71,8 @@ module.exports = React.createClass({
this.dispatcherRef = dis.register(this.onAction);
// Initialise the stickyHeaders when the component is created
this._updateStickyHeaders(true);
this.mounted = true;
},
componentDidUpdate: function() {
@ -106,6 +110,8 @@ module.exports = React.createClass({
},
componentWillUnmount: function() {
this.mounted = false;
dis.unregister(this.dispatcherRef);
if (MatrixClientPeg.get()) {
MatrixClientPeg.get().removeListener("Room", this.onRoom);
@ -311,6 +317,7 @@ module.exports = React.createClass({
},
_getScrollNode: function() {
if (!this.mounted) return null;
var panel = ReactDOM.findDOMNode(this);
if (!panel) return null;
@ -337,6 +344,7 @@ module.exports = React.createClass({
var incomingCallBox = document.getElementById("incomingCallBox");
if (incomingCallBox && incomingCallBox.parentElement) {
var scrollArea = this._getScrollNode();
if (!scrollArea) return;
// Use the offset of the top of the scroll area from the window
// as this is used to calculate the CSS fixed top position for the stickies
var scrollAreaOffset = scrollArea.getBoundingClientRect().top + window.pageYOffset;
@ -360,6 +368,7 @@ module.exports = React.createClass({
// properly through React
_initAndPositionStickyHeaders: function(initialise, scrollToPosition) {
var scrollArea = this._getScrollNode();
if (!scrollArea) return;
// Use the offset of the top of the scroll area from the window
// as this is used to calculate the CSS fixed top position for the stickies
var scrollAreaOffset = scrollArea.getBoundingClientRect().top + window.pageYOffset;