383 lines
10 KiB
TypeScript
383 lines
10 KiB
TypeScript
// Copyright 2020-2021 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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import Quill from 'quill';
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import Delta from 'quill-delta';
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import React from 'react';
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import _, { isNumber } from 'lodash';
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import { Popper } from 'react-popper';
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import classNames from 'classnames';
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import { createPortal } from 'react-dom';
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import type { VirtualElement } from '@popperjs/core';
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import type { EmojiData } from '../../components/emoji/lib';
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import {
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search,
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convertShortName,
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isShortName,
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convertShortNameToData,
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} from '../../components/emoji/lib';
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import { Emoji } from '../../components/emoji/Emoji';
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import type { EmojiPickDataType } from '../../components/emoji/EmojiPicker';
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import { getBlotTextPartitions, matchBlotTextPartitions } from '../util';
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import { handleOutsideClick } from '../../util/handleOutsideClick';
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import * as log from '../../logging/log';
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const Keyboard = Quill.import('modules/keyboard');
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type EmojiPickerOptions = {
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onPickEmoji: (emoji: EmojiPickDataType) => void;
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setEmojiPickerElement: (element: JSX.Element | null) => void;
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skinTone: number;
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};
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export class EmojiCompletion {
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results: Array<EmojiData>;
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index: number;
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options: EmojiPickerOptions;
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root: HTMLDivElement;
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quill: Quill;
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outsideClickDestructor: () => void;
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constructor(quill: Quill, options: EmojiPickerOptions) {
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this.results = [];
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this.index = 0;
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this.options = options;
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this.root = document.body.appendChild(document.createElement('div'));
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this.quill = quill;
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// Just to make sure that we don't propagate outside clicks until this
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// is closed.
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this.outsideClickDestructor = handleOutsideClick(
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() => {
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return true;
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},
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{
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name: 'quill.emoji.completion',
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containerElements: [this.root],
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}
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);
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const clearResults = () => {
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if (this.results.length) {
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this.reset();
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}
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return true;
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};
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const changeIndex = (by: number) => (): boolean => {
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if (this.results.length) {
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this.changeIndex(by);
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return false;
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}
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return true;
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};
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this.quill.keyboard.addBinding({ key: Keyboard.keys.UP }, changeIndex(-1));
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this.quill.keyboard.addBinding({ key: Keyboard.keys.RIGHT }, clearResults);
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this.quill.keyboard.addBinding({ key: Keyboard.keys.DOWN }, changeIndex(1));
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this.quill.keyboard.addBinding({ key: Keyboard.keys.LEFT }, clearResults);
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this.quill.keyboard.addBinding(
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{
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// 186 + Shift = Colon
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key: 186,
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shiftKey: true,
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},
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() => this.onTextChange(true)
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);
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this.quill.keyboard.addBinding(
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{
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// 58 = Also Colon
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key: 58,
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},
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() => this.onTextChange(true)
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);
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this.quill.on(
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'text-change',
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_.debounce(() => this.onTextChange(), 100)
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);
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this.quill.on('selection-change', this.onSelectionChange.bind(this));
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}
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destroy(): void {
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this.outsideClickDestructor();
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this.root.remove();
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}
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changeIndex(by: number): void {
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this.index = (this.index + by + this.results.length) % this.results.length;
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this.render();
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}
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getCurrentLeafTextPartitions(): [string, string] {
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const range = this.quill.getSelection();
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const [blot, index] = this.quill.getLeaf(range ? range.index : -1);
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return getBlotTextPartitions(blot.text, index);
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}
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onSelectionChange(): void {
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// Selection should never change while we're editing an emoji
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this.reset();
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}
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onTextChange(justPressedColon = false): boolean {
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const PASS_THROUGH = true;
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const INTERCEPT = false;
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const range = this.quill.getSelection();
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if (!range) {
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return PASS_THROUGH;
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}
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const [blot, index] = this.quill.getLeaf(range.index);
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const [leftTokenTextMatch, rightTokenTextMatch] = matchBlotTextPartitions(
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blot,
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index,
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/(?<=^|\s):([-+0-9a-zA-Z_]*)(:?)$/,
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/^([-+0-9a-zA-Z_]*):/
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);
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if (leftTokenTextMatch) {
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const [, leftTokenText, isSelfClosing] = leftTokenTextMatch;
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if (isSelfClosing || justPressedColon) {
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if (isShortName(leftTokenText)) {
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const emojiData = convertShortNameToData(
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leftTokenText,
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this.options.skinTone
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);
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const numberOfColons = isSelfClosing ? 2 : 1;
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if (emojiData) {
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this.insertEmoji(
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emojiData,
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range.index - leftTokenText.length - numberOfColons,
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leftTokenText.length + numberOfColons
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);
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return INTERCEPT;
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}
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} else {
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this.reset();
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return PASS_THROUGH;
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}
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}
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if (rightTokenTextMatch) {
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const [, rightTokenText] = rightTokenTextMatch;
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const tokenText = leftTokenText + rightTokenText;
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if (isShortName(tokenText)) {
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const emojiData = convertShortNameToData(
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tokenText,
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this.options.skinTone
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);
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if (emojiData) {
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this.insertEmoji(
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emojiData,
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range.index - leftTokenText.length - 1,
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tokenText.length + 2
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);
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return INTERCEPT;
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}
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}
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}
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if (leftTokenText.length < 3) {
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this.reset();
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return PASS_THROUGH;
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}
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const showEmojiResults = search(leftTokenText, 10);
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if (showEmojiResults.length > 0) {
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this.results = showEmojiResults;
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this.index = Math.min(this.results.length - 1, this.index);
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this.render();
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} else if (this.results.length !== 0) {
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this.reset();
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}
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} else if (this.results.length !== 0) {
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this.reset();
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}
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return PASS_THROUGH;
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}
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completeEmoji(): void {
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const range = this.quill.getSelection();
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if (range == null) {
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return;
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}
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const emoji = this.results[this.index];
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const [leafText] = this.getCurrentLeafTextPartitions();
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const tokenTextMatch = /:([-+0-9a-z_]*)(:?)$/.exec(leafText);
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if (tokenTextMatch == null) {
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return;
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}
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const [, tokenText] = tokenTextMatch;
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this.insertEmoji(
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emoji,
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range.index - tokenText.length - 1,
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tokenText.length + 1,
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true
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);
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}
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insertEmoji(
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emojiData: EmojiData,
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index: number,
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range: number,
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withTrailingSpace = false
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): void {
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const emoji = convertShortName(emojiData.short_name, this.options.skinTone);
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const delta = new Delta().retain(index).delete(range).insert({ emoji });
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if (withTrailingSpace) {
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this.quill.updateContents(delta.insert(' '), 'user');
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this.quill.setSelection(index + 2, 0, 'user');
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} else {
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this.quill.updateContents(delta, 'user');
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this.quill.setSelection(index + 1, 0, 'user');
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}
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this.options.onPickEmoji({
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shortName: emojiData.short_name,
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skinTone: this.options.skinTone,
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});
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this.reset();
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}
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reset(): void {
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if (this.results.length) {
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this.results = [];
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this.index = 0;
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this.render();
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}
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}
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onUnmount(): void {
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document.body.removeChild(this.root);
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}
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render(): void {
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const { results: emojiResults, index: emojiResultsIndex } = this;
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if (emojiResults.length === 0) {
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this.options.setEmojiPickerElement(null);
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return;
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}
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// a virtual reference to the text we are trying to auto-complete
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const reference: VirtualElement = {
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getBoundingClientRect() {
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const selection = window.getSelection();
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// there's a selection and at least one range
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if (selection != null && selection.rangeCount !== 0) {
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// grab the first range, the one the user is actually on right now
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// clone it so we don't actually modify the user's selection/caret position
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const range = selection.getRangeAt(0).cloneRange();
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// if for any reason the range is a selection (not just a caret)
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// collapse it to just a caret, so we can walk it back to the :word
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range.collapse(true);
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// if we can, position the popper at the beginning of the emoji text (:word)
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const textBeforeCursor = range.endContainer.textContent?.slice(
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0,
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range.startOffset
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);
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const startOfEmojiText = textBeforeCursor?.lastIndexOf(':');
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if (
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textBeforeCursor &&
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isNumber(startOfEmojiText) &&
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startOfEmojiText !== -1
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) {
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range.setStart(range.endContainer, startOfEmojiText);
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} else {
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log.warn(
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`Could not find the beginning of the emoji word to be completed. startOfEmojiText=${startOfEmojiText}, textBeforeCursor.length=${textBeforeCursor?.length}, range.offsets=${range.startOffset}-${range.endOffset}`
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);
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}
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return range.getClientRects()[0];
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}
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log.warn('No selection range when auto-completing emoji');
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return new DOMRect(); // don't crash just because we couldn't get a rectangle
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},
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};
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const element = createPortal(
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<Popper placement="top-start" referenceElement={reference}>
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{({ ref, style }) => (
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<div
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ref={ref}
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className="module-composition-input__suggestions"
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style={style}
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role="listbox"
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aria-expanded
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aria-activedescendant={`emoji-result--${
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emojiResults.length
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? emojiResults[emojiResultsIndex].short_name
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: ''
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}`}
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tabIndex={0}
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>
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{emojiResults.map((emoji, index) => (
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<button
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type="button"
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key={emoji.short_name}
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id={`emoji-result--${emoji.short_name}`}
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role="option button"
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aria-selected={emojiResultsIndex === index}
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onClick={() => {
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this.index = index;
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this.completeEmoji();
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}}
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className={classNames(
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'module-composition-input__suggestions__row',
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emojiResultsIndex === index
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? 'module-composition-input__suggestions__row--selected'
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: null
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)}
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>
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<Emoji
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shortName={emoji.short_name}
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size={16}
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skinTone={this.options.skinTone}
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/>
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<div className="module-composition-input__suggestions__row__short-name">
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:{emoji.short_name}:
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</div>
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</button>
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))}
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</div>
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)}
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</Popper>,
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document.body
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);
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this.options.setEmojiPickerElement(element);
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}
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}
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