119 lines
4.3 KiB
TypeScript
119 lines
4.3 KiB
TypeScript
/*
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Copyright 2016 Aviral Dasgupta
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Copyright 2017, 2018 New Vector Ltd
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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 { ReactElement } from "react";
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import { Room } from "matrix-js-sdk/src/models/room";
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import CommandProvider from "./CommandProvider";
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import RoomProvider from "./RoomProvider";
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import UserProvider from "./UserProvider";
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import EmojiProvider from "./EmojiProvider";
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import NotifProvider from "./NotifProvider";
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import { timeout } from "../utils/promise";
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import AutocompleteProvider, { ICommand } from "./AutocompleteProvider";
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import SpaceProvider from "./SpaceProvider";
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import { TimelineRenderingType } from "../contexts/RoomContext";
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export interface ISelectionRange {
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beginning?: boolean; // whether the selection is in the first block of the editor or not
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start: number; // byte offset relative to the start anchor of the current editor selection.
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end: number; // byte offset relative to the end anchor of the current editor selection.
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}
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export interface ICompletion {
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type?: "at-room" | "command" | "community" | "room" | "user";
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completion: string;
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completionId?: string;
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component?: ReactElement;
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range: ISelectionRange;
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command?: string;
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suffix?: string;
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// If provided, apply a LINK entity to the completion with the
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// data = { url: href }.
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href?: string;
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}
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const PROVIDERS = [UserProvider, RoomProvider, EmojiProvider, NotifProvider, CommandProvider, SpaceProvider];
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// Providers will get rejected if they take longer than this.
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const PROVIDER_COMPLETION_TIMEOUT = 3000;
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export interface IProviderCompletions {
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completions: ICompletion[];
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provider: AutocompleteProvider;
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command: ICommand;
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}
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export default class Autocompleter {
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public room: Room;
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public providers: AutocompleteProvider[];
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public constructor(room: Room, renderingType: TimelineRenderingType = TimelineRenderingType.Room) {
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this.room = room;
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this.providers = PROVIDERS.map((Prov) => {
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return new Prov(room, renderingType);
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});
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}
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public destroy(): void {
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this.providers.forEach((p) => {
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p.destroy();
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});
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}
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public async getCompletions(
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query: string,
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selection: ISelectionRange,
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force = false,
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limit = -1,
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): Promise<IProviderCompletions[]> {
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/* Note: This intentionally waits for all providers to return,
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otherwise, we run into a condition where new completions are displayed
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while the user is interacting with the list, which makes it difficult
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to predict whether an action will actually do what is intended
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*/
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// list of results from each provider, each being a list of completions or null if it times out
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const completionsList: ICompletion[][] = await Promise.all(
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this.providers.map(async (provider): Promise<ICompletion[] | null> => {
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return timeout(
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provider.getCompletions(query, selection, force, limit),
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null,
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PROVIDER_COMPLETION_TIMEOUT,
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);
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}),
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);
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// map then filter to maintain the index for the map-operation, for this.providers to line up
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return completionsList
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.map((completions, i) => {
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if (!completions || !completions.length) return;
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return {
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completions,
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provider: this.providers[i],
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/* the currently matched "command" the completer tried to complete
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* we pass this through so that Autocomplete can figure out when to
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* re-show itself once hidden.
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*/
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command: this.providers[i].getCurrentCommand(query, selection, force),
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};
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})
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.filter(Boolean);
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}
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}
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