refactoring

Resolve #7779

1 files changed, 276 insertions, 0 deletions

diff --git a/packages/client/src/scripts/autocomplete.ts b/packages/client/src/scripts/autocomplete.ts
new file mode 100644
index 0000000000..f2d5806484
--- /dev/null
+++ b/packages/client/src/scripts/autocomplete.ts
@@ -0,0 +1,276 @@
+import { Ref, ref } from 'vue';
+import * as getCaretCoordinates from 'textarea-caret';
+import { toASCII } from 'punycode/';
+import { popup } from '@/os';
+
+export class Autocomplete {
+	private suggestion: {
+		x: Ref<number>;
+		y: Ref<number>;
+		q: Ref<string | null>;
+		close: Function;
+	} | null;
+	private textarea: any;
+	private vm: any;
+	private currentType: string;
+	private opts: {
+		model: string;
+	};
+	private opening: boolean;
+
+	private get text(): string {
+		return this.vm[this.opts.model];
+	}
+
+	private set text(text: string) {
+		this.vm[this.opts.model] = text;
+	}
+
+	/**
+	 * 対象のテキストエリアを与えてインスタンスを初期化します。
+	 */
+	constructor(textarea, vm, opts) {
+		//#region BIND
+		this.onInput = this.onInput.bind(this);
+		this.complete = this.complete.bind(this);
+		this.close = this.close.bind(this);
+		//#endregion
+
+		this.suggestion = null;
+		this.textarea = textarea;
+		this.vm = vm;
+		this.opts = opts;
+		this.opening = false;
+
+		this.attach();
+	}
+
+	/**
+	 * このインスタンスにあるテキストエリアの入力のキャプチャを開始します。
+	 */
+	public attach() {
+		this.textarea.addEventListener('input', this.onInput);
+	}
+
+	/**
+	 * このインスタンスにあるテキストエリアの入力のキャプチャを解除します。
+	 */
+	public detach() {
+		this.textarea.removeEventListener('input', this.onInput);
+		this.close();
+	}
+
+	/**
+	 * テキスト入力時
+	 */
+	private onInput() {
+		const caretPos = this.textarea.selectionStart;
+		const text = this.text.substr(0, caretPos).split('\n').pop()!;
+
+		const mentionIndex = text.lastIndexOf('@');
+		const hashtagIndex = text.lastIndexOf('#');
+		const emojiIndex = text.lastIndexOf(':');
+		const mfmTagIndex = text.lastIndexOf('$');
+
+		const max = Math.max(
+			mentionIndex,
+			hashtagIndex,
+			emojiIndex,
+			mfmTagIndex);
+
+		if (max == -1) {
+			this.close();
+			return;
+		}
+
+		const isMention = mentionIndex != -1;
+		const isHashtag = hashtagIndex != -1;
+		const isMfmTag = mfmTagIndex != -1;
+		const isEmoji = emojiIndex != -1 && text.split(/:[a-z0-9_+\-]+:/).pop()!.includes(':');
+
+		let opened = false;
+
+		if (isMention) {
+			const username = text.substr(mentionIndex + 1);
+			if (username != '' && username.match(/^[a-zA-Z0-9_]+$/)) {
+				this.open('user', username);
+				opened = true;
+			} else if (username === '') {
+				this.open('user', null);
+				opened = true;
+			}
+		}
+
+		if (isHashtag && !opened) {
+			const hashtag = text.substr(hashtagIndex + 1);
+			if (!hashtag.includes(' ')) {
+				this.open('hashtag', hashtag);
+				opened = true;
+			}
+		}
+
+		if (isEmoji && !opened) {
+			const emoji = text.substr(emojiIndex + 1);
+			if (!emoji.includes(' ')) {
+				this.open('emoji', emoji);
+				opened = true;
+			}
+		}
+
+		if (isMfmTag && !opened) {
+			const mfmTag = text.substr(mfmTagIndex + 1);
+			if (!mfmTag.includes(' ')) {
+				this.open('mfmTag', mfmTag.replace('[', ''));
+				opened = true;
+			}
+		}
+
+		if (!opened) {
+			this.close();
+		}
+	}
+
+	/**
+	 * サジェストを提示します。
+	 */
+	private async open(type: string, q: string | null) {
+		if (type != this.currentType) {
+			this.close();
+		}
+		if (this.opening) return;
+		this.opening = true;
+		this.currentType = type;
+
+		//#region サジェストを表示すべき位置を計算
+		const caretPosition = getCaretCoordinates(this.textarea, this.textarea.selectionStart);
+
+		const rect = this.textarea.getBoundingClientRect();
+
+		const x = rect.left + caretPosition.left - this.textarea.scrollLeft;
+		const y = rect.top + caretPosition.top - this.textarea.scrollTop;
+		//#endregion
+
+		if (this.suggestion) {
+			this.suggestion.x.value = x;
+			this.suggestion.y.value = y;
+			this.suggestion.q.value = q;
+
+			this.opening = false;
+		} else {
+			const _x = ref(x);
+			const _y = ref(y);
+			const _q = ref(q);
+
+			const { dispose } = await popup(import('@/components/autocomplete.vue'), {
+				textarea: this.textarea,
+				close: this.close,
+				type: type,
+				q: _q,
+				x: _x,
+				y: _y,
+			}, {
+				done: (res) => {
+					this.complete(res);
+				}
+			});
+
+			this.suggestion = {
+				q: _q,
+				x: _x,
+				y: _y,
+				close: () => dispose(),
+			};
+
+			this.opening = false;
+		}
+	}
+
+	/**
+	 * サジェストを閉じます。
+	 */
+	private close() {
+		if (this.suggestion == null) return;
+
+		this.suggestion.close();
+		this.suggestion = null;
+
+		this.textarea.focus();
+	}
+
+	/**
+	 * オートコンプリートする
+	 */
+	private complete({ type, value }) {
+		this.close();
+
+		const caret = this.textarea.selectionStart;
+
+		if (type == 'user') {
+			const source = this.text;
+
+			const before = source.substr(0, caret);
+			const trimmedBefore = before.substring(0, before.lastIndexOf('@'));
+			const after = source.substr(caret);
+
+			const acct = value.host === null ? value.username : `${value.username}@${toASCII(value.host)}`;
+
+			// 挿入
+			this.text = `${trimmedBefore}@${acct} ${after}`;
+
+			// キャレットを戻す
+			this.vm.$nextTick(() => {
+				this.textarea.focus();
+				const pos = trimmedBefore.length + (acct.length + 2);
+				this.textarea.setSelectionRange(pos, pos);
+			});
+		} else if (type == 'hashtag') {
+			const source = this.text;
+
+			const before = source.substr(0, caret);
+			const trimmedBefore = before.substring(0, before.lastIndexOf('#'));
+			const after = source.substr(caret);
+
+			// 挿入
+			this.text = `${trimmedBefore}#${value} ${after}`;
+
+			// キャレットを戻す
+			this.vm.$nextTick(() => {
+				this.textarea.focus();
+				const pos = trimmedBefore.length + (value.length + 2);
+				this.textarea.setSelectionRange(pos, pos);
+			});
+		} else if (type == 'emoji') {
+			const source = this.text;
+
+			const before = source.substr(0, caret);
+			const trimmedBefore = before.substring(0, before.lastIndexOf(':'));
+			const after = source.substr(caret);
+
+			// 挿入
+			this.text = trimmedBefore + value + after;
+
+			// キャレットを戻す
+			this.vm.$nextTick(() => {
+				this.textarea.focus();
+				const pos = trimmedBefore.length + value.length;
+				this.textarea.setSelectionRange(pos, pos);
+			});
+		} else if (type == 'mfmTag') {
+			const source = this.text;
+
+			const before = source.substr(0, caret);
+			const trimmedBefore = before.substring(0, before.lastIndexOf('$'));
+			const after = source.substr(caret);
+
+			// 挿入
+			this.text = `${trimmedBefore}$[${value} ]${after}`;
+
+			// キャレットを戻す
+			this.vm.$nextTick(() => {
+				this.textarea.focus();
+				const pos = trimmedBefore.length + (value.length + 3);
+				this.textarea.setSelectionRange(pos, pos);
+			});
+		}
+	}
+}