136 lines
4.2 KiB
JavaScript
136 lines
4.2 KiB
JavaScript
/*
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Copyright 2020 Bruno Windels <bruno@windels.cloud>
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import {SimpleTile} from "./SimpleTile.js";
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import {UpdateAction} from "../UpdateAction.js";
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export class GapTile extends SimpleTile {
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constructor(entry, options) {
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super(entry, options);
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this._loading = false;
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this._error = null;
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this._isAtTop = true;
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this._siblingChanged = false;
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}
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async fill() {
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if (!this._loading && !this._entry.edgeReached) {
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this._loading = true;
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this.emitChange("isLoading");
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try {
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await this._room.fillGap(this._entry, 10);
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} catch (err) {
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console.error(`room.fillGap(): ${err.message}:\n${err.stack}`);
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this._error = err;
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this.emitChange("error");
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// rethrow so caller of this method
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// knows not to keep calling this for now
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throw err;
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} finally {
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this._loading = false;
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this.emitChange("isLoading");
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}
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return true;
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}
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return false;
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}
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async notifyVisible() {
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// we do (up to 10) backfills while no new tiles have been added to the timeline
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// because notifyVisible won't be called again until something gets added to the timeline
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let depth = 0;
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let canFillMore;
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this._siblingChanged = false;
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do {
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canFillMore = await this.fill();
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depth = depth + 1;
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} while (depth < 10 && !this._siblingChanged && canFillMore && !this.isDisposed);
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}
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get isAtTop() {
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return this._isAtTop;
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}
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updatePreviousSibling(prev) {
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super.updatePreviousSibling(prev);
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const isAtTop = !prev;
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if (this._isAtTop !== isAtTop) {
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this._isAtTop = isAtTop;
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this.emitChange("isAtTop");
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}
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this._siblingChanged = true;
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}
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updateNextSibling() {
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// if the sibling of the gap changed while calling room.fill(),
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// we intepret this as at least one new tile has been added to
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// the timeline. See notifyVisible why this is important.
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this._siblingChanged = true;
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}
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updateEntry(entry, params) {
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super.updateEntry(entry, params);
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if (!entry.isGap) {
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return UpdateAction.Remove();
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} else {
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return UpdateAction.Nothing();
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}
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}
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get shape() {
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return "gap";
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}
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get isLoading() {
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return this._loading;
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}
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get error() {
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if (this._error) {
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const dir = this._entry.prev_batch ? "previous" : "next";
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return `Could not load ${dir} messages: ${this._error.message}`;
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}
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return null;
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}
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}
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import {FragmentBoundaryEntry} from "../../../../../matrix/room/timeline/entries/FragmentBoundaryEntry.js";
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export function tests() {
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return {
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"uses updated token to fill": async assert => {
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let currentToken = 5;
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const fragment = {
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id: 0,
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previousToken: currentToken,
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roomId: "!abc"
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};
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const room = {
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async fillGap(entry) {
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assert.equal(entry.token, currentToken);
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currentToken += 1;
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const newEntry = entry.withUpdatedFragment(Object.assign({}, fragment, {previousToken: currentToken}));
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tile.updateEntry(newEntry);
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}
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};
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const tile = new GapTile(new FragmentBoundaryEntry(fragment, true), {roomVM: {room}});
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await tile.fill();
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await tile.fill();
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await tile.fill();
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assert.equal(currentToken, 8);
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}
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}
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}
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