take (potentially clipped) content height into account for filling

This commit is contained in:
Bruno Windels 2019-03-19 16:51:39 +01:00
parent 469511aa44
commit 2bcced72ad

View file

@ -298,11 +298,14 @@ module.exports = React.createClass({
// `---------' -
//
if (sn.scrollTop < sn.clientHeight) {
const contentHeight = this._getMessagesHeight();
const contentTop = contentHeight - this._getListHeight();
const contentScrollTop = sn.scrollTop + contentTop;
if (contentScrollTop < sn.clientHeight) {
// need to back-fill
this._maybeFill(true);
}
if (sn.scrollTop > sn.scrollHeight - sn.clientHeight * 2) {
if (contentScrollTop > contentHeight - sn.clientHeight * 2) {
// need to forward-fill
this._maybeFill(false);
}