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Show 'show more' when there are less tiles than the default

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For example, if you only have 3/10 rooms required for the default then resize smaller, we should have a 'show more' button.

This works by changing the rendering to be slightly more efficient and only looping over what is seen (renderVisibleTiles(), using this.numTiles in place of tiles.length) and using a new setVisibleTilesWithin() function on the layout. Previously resizing the 3/10 case would be setting visibleTiles to ~8 instead of ~1 like it should (because the getter returns a default).
This commit is contained in:
Travis Ralston 2020-06-30 19:14:36 -06:00
parent 8cfe12b817
commit 7674030c6e
2 changed files with 31 additions and 16 deletions
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39
src/components/views/rooms/RoomSublist2.tsx
View file

@ -91,6 +91,12 @@ export default class RoomSublist2 extends React.Component<IProps, IState> {
return (this.props.rooms || []).length;
}
private get numVisibleTiles(): number {
if (!this.props.layout) return 0;
const nVisible = Math.floor(this.props.layout.visibleTiles);
return Math.min(nVisible, this.numTiles);
}
public componentDidUpdate() {
this.state.notificationState.setRooms(this.props.rooms);
}
@ -107,7 +113,7 @@ export default class RoomSublist2 extends React.Component<IProps, IState> {
private onResize = (e: React.MouseEvent, data: ResizeCallbackData) => {
const direction = e.movementY < 0 ? -1 : +1;
const tileDiff = this.props.layout.pixelsToTiles(Math.abs(e.movementY)) * direction;
this.props.layout.visibleTiles += tileDiff;
this.props.layout.setVisibleTilesWithin(tileDiff, this.numTiles);
this.forceUpdate(); // because the layout doesn't trigger a re-render
};
@ -173,13 +179,17 @@ export default class RoomSublist2 extends React.Component<IProps, IState> {
}
};
private renderTiles(): React.ReactElement[] {
if (this.props.layout && this.props.layout.isCollapsed) return []; // don't waste time on rendering
private renderVisibleTiles(): React.ReactElement[] {
if (this.props.layout && this.props.layout.isCollapsed) {
// don't waste time on rendering
return [];
}
const tiles: React.ReactElement[] = [];
if (this.props.rooms) {
for (const room of this.props.rooms) {
const visibleRooms = this.props.rooms.slice(0, this.numVisibleTiles);
for (const room of visibleRooms) {
tiles.push(
<RoomTile2
room={room}
@ -338,7 +348,7 @@ export default class RoomSublist2 extends React.Component<IProps, IState> {
public render(): React.ReactElement {
// TODO: Error boundary: https://github.com/vector-im/riot-web/issues/14185
const tiles = this.renderTiles();
const visibleTiles = this.renderVisibleTiles();
const classes = classNames({
'mx_RoomSublist2': true,
@ -347,13 +357,10 @@ export default class RoomSublist2 extends React.Component<IProps, IState> {
});
let content = null;
if (tiles.length > 0) {
if (visibleTiles.length > 0) {
const layout = this.props.layout; // to shorten calls
const nVisible = Math.floor(layout.visibleTiles);
const visibleTiles = tiles.slice(0, nVisible);
const maxTilesFactored = layout.tilesWithResizerBoxFactor(tiles.length);
const maxTilesFactored = layout.tilesWithResizerBoxFactor(this.numTiles);
const showMoreBtnClasses = classNames({
'mx_RoomSublist2_showNButton': true,
'mx_RoomSublist2_isCutting': this.state.isResizing && layout.visibleTiles < maxTilesFactored,
@ -363,9 +370,9 @@ export default class RoomSublist2 extends React.Component<IProps, IState> {
// floats above the resize handle, if we have one present. If the user has all
// tiles visible, it becomes 'show less'.
let showNButton = null;
if (tiles.length > nVisible) {
if (this.numTiles > this.numVisibleTiles) {
// we have a cutoff condition - add the button to show all
const numMissing = tiles.length - visibleTiles.length;
const numMissing = this.numTiles - visibleTiles.length;
let showMoreText = (
<span className='mx_RoomSublist2_showNButtonText'>
{_t("Show %(count)s more", {count: numMissing})}
@ -380,7 +387,7 @@ export default class RoomSublist2 extends React.Component<IProps, IState> {
{showMoreText}
</div>
);
} else if (tiles.length <= nVisible && tiles.length > this.props.layout.defaultVisibleTiles) {
} else if (this.numTiles <= this.numVisibleTiles && this.numTiles > this.props.layout.defaultVisibleTiles) {
// we have all tiles visible - add a button to show less
let showLessText = (
<span className='mx_RoomSublist2_showNButtonText'>
@ -400,7 +407,7 @@ export default class RoomSublist2 extends React.Component<IProps, IState> {
// Figure out if we need a handle
let handles = ['s'];
if (layout.visibleTiles >= tiles.length && tiles.length <= layout.minVisibleTiles) {
if (layout.visibleTiles >= this.numTiles && this.numTiles <= layout.minVisibleTiles) {
handles = []; // no handles, we're at a minimum
}
@ -419,9 +426,9 @@ export default class RoomSublist2 extends React.Component<IProps, IState> {
if (showNButton) padding += SHOW_N_BUTTON_HEIGHT;
padding += RESIZE_HANDLE_HEIGHT; // always append the handle height
const relativeTiles = layout.tilesWithPadding(tiles.length, padding);
const relativeTiles = layout.tilesWithPadding(this.numTiles, padding);
const minTilesPx = layout.calculateTilesToPixelsMin(relativeTiles, layout.minVisibleTiles, padding);
const maxTilesPx = layout.tilesToPixelsWithPadding(tiles.length, padding);
const maxTilesPx = layout.tilesToPixelsWithPadding(this.numTiles, padding);
const tilesWithoutPadding = Math.min(relativeTiles, layout.visibleTiles);
const tilesPx = layout.calculateTilesToPixelsMin(relativeTiles, tilesWithoutPadding, padding);

8
src/stores/room-list/ListLayout.ts
View file

@ -89,6 +89,14 @@ export class ListLayout {
return 10 + RESIZER_BOX_FACTOR;
}
public setVisibleTilesWithin(diff: number, maxPossible: number) {
if (this.visibleTiles > maxPossible) {
this.visibleTiles = maxPossible + diff;
} else {
this.visibleTiles += diff;
}
}
public calculateTilesToPixelsMin(maxTiles: number, n: number, possiblePadding: number): number {
// Only apply the padding if we're about to use maxTiles as we need to
// plan for the padding. If we're using n, the padding is already accounted