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make collapsing/expanding the first header work again

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This commit is contained in:
Bruno Windels 2020-07-08 15:11:47 +02:00
parent a8085f4e3b
commit a361ac3f83
2 changed files with 14 additions and 9 deletions
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16
src/components/structures/LeftPanel2.tsx
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@ -21,6 +21,7 @@ import classNames from "classnames";
import dis from "../../dispatcher/dispatcher";
import { _t } from "../../languageHandler";
import RoomList2 from "../views/rooms/RoomList2";
import { HEADER_HEIGHT } from "../views/rooms/RoomSublist2";
import { Action } from "../../dispatcher/actions";
import UserMenu from "./UserMenu";
import RoomSearch from "./RoomSearch";
@ -135,7 +136,6 @@ export default class LeftPanel2 extends React.Component<IProps, IState> {
const bottom = rlRect.bottom;
const top = rlRect.top;
const sublists = list.querySelectorAll<HTMLDivElement>(".mx_RoomSublist2");
const headerHeight = 32; // Note: must match the CSS!
const headerRightMargin = 24; // calculated from margins and widths to align with non-sticky tiles
const headerStickyWidth = rlRect.width - headerRightMargin;
@ -147,22 +147,22 @@ export default class LeftPanel2 extends React.Component<IProps, IState> {
const header = sublist.querySelector<HTMLDivElement>(".mx_RoomSublist2_stickable");
if (slRect.top + headerHeight > bottom && !gotBottom) {
if (slRect.top + HEADER_HEIGHT > bottom && !gotBottom) {
header.classList.add("mx_RoomSublist2_headerContainer_sticky");
header.classList.add("mx_RoomSublist2_headerContainer_stickyBottom");
header.style.width = `${headerStickyWidth}px`;
header.style.removeProperty("top");
gotBottom = true;
} else if (((slRect.top - (headerHeight * 0.6) + headerHeight) < top) || sublist === sublists[0]) {
} else if (((slRect.top - (HEADER_HEIGHT * 0.6) + HEADER_HEIGHT) < top) || sublist === sublists[0]) {
// the header should become sticky once it is 60% or less out of view at the top.
// We also add headerHeight because the sticky header is put above the scrollable area,
// We also add HEADER_HEIGHT because the sticky header is put above the scrollable area,
// into the padding of .mx_LeftPanel2_roomListWrapper,
// by subtracting headerHeight from the top below.
// by subtracting HEADER_HEIGHT from the top below.
// We also always try to make the first sublist header sticky.
header.classList.add("mx_RoomSublist2_headerContainer_sticky");
header.classList.add("mx_RoomSublist2_headerContainer_stickyTop");
header.style.width = `${headerStickyWidth}px`;
header.style.top = `${rlRect.top - headerHeight}px`;
header.style.top = `${rlRect.top - HEADER_HEIGHT}px`;
if (lastTopHeader) {
lastTopHeader.style.display = "none";
}
@ -194,8 +194,8 @@ export default class LeftPanel2 extends React.Component<IProps, IState> {
// ensure scroll doesn't go above the gap left by the header of
// the first sublist always being sticky if no other header is sticky
if (list.scrollTop < headerHeight) {
list.scrollTop = headerHeight;
if (list.scrollTop < HEADER_HEIGHT) {
list.scrollTop = HEADER_HEIGHT;
}
}