PrivateCoffee/element-web
4
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions 3

Fix ScrollPanel.isAtBottom for non-standard DPI settings

Browse source
This commit is contained in:
Richard van der Hoff 2021-09-29 11:16:41 +01:00
parent 399ceaf002
commit b285315cb8
1 changed files with 9 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
src/components/structures/ScrollPanel.tsx
View file

@ -277,8 +277,15 @@ export default class ScrollPanel extends React.Component<IProps> {
// fractional values (both too big and too small)
// for scrollTop happen on certain browsers/platforms
// when scrolled all the way down. E.g. Chrome 72 on debian.
// so check difference <= 1;
return Math.abs(sn.scrollHeight - (sn.scrollTop + sn.clientHeight)) <= 1;
//
// We therefore leave a bit of wiggle-room and assume we're at the
// bottom if the unscrolled area is less than one pixel high.
//
// non-standard DPI settings also seem to have effect here and can
// actually lead to scrollTop+clientHeight being *larger* than
// scrollHeight. (observed in element-desktop on Ubuntu 20.04)
//
return sn.scrollHeight - (sn.scrollTop + sn.clientHeight) <= 1;
};
// returns the vertical height in the given direction that can be removed from