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6 changed files with 121 additions and 85 deletions
162
src/web/app/common/views/directives/autocomplete.ts
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162
src/web/app/common/views/directives/autocomplete.ts
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import * as getCaretCoordinates from 'textarea-caret';
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import MkAutocomplete from '../components/autocomplete.vue';
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export default {
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bind(el, binding, vn) {
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const self = el._autoCompleteDirective_ = {} as any;
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self.x = new Autocomplete(el);
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self.x.attach();
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},
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unbind(el, binding, vn) {
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const self = el._autoCompleteDirective_;
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self.x.detach();
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}
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};
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/**
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* オートコンプリートを管理するクラス。
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*/
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class Autocomplete {
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private suggestion: any;
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private textarea: any;
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/**
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* 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。
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*/
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constructor(textarea) {
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//#region BIND
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this.onInput = this.onInput.bind(this);
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this.complete = this.complete.bind(this);
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this.close = this.close.bind(this);
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//#endregion
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this.suggestion = null;
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this.textarea = textarea;
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}
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/**
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* 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。
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*/
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public attach() {
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this.textarea.addEventListener('input', this.onInput);
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}
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/**
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* 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。
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*/
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public detach() {
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this.textarea.removeEventListener('input', this.onInput);
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this.close();
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}
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/**
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* テキスト入力時
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*/
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private onInput() {
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this.close();
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const caret = this.textarea.selectionStart;
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const text = this.textarea.value.substr(0, caret);
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const mentionIndex = text.lastIndexOf('@');
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const emojiIndex = text.lastIndexOf(':');
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if (mentionIndex != -1 && mentionIndex > emojiIndex) {
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const username = text.substr(mentionIndex + 1);
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if (!username.match(/^[a-zA-Z0-9-]+$/)) return;
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this.open('user', username);
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}
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if (emojiIndex != -1 && emojiIndex > mentionIndex) {
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const emoji = text.substr(emojiIndex + 1);
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if (!emoji.match(/^[\+\-a-z_]+$/)) return;
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this.open('emoji', emoji);
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}
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}
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/**
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* サジェストを提示します。
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*/
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private open(type, q) {
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// 既に開いているサジェストは閉じる
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this.close();
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// サジェスト要素作成
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this.suggestion = new MkAutocomplete({
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propsData: {
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textarea: this.textarea,
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complete: this.complete,
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close: this.close,
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type: type,
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q: q
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}
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}).$mount();
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//#region サジェストを表示すべき位置を計算
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const caretPosition = getCaretCoordinates(this.textarea, this.textarea.selectionStart);
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const rect = this.textarea.getBoundingClientRect();
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const x = rect.left + window.pageXOffset + caretPosition.left - this.textarea.scrollLeft;
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const y = rect.top + window.pageYOffset + caretPosition.top - this.textarea.scrollTop;
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//#endregion
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this.suggestion.$el.style.left = x + 'px';
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this.suggestion.$el.style.top = y + 'px';
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// 要素追加
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document.body.appendChild(this.suggestion.$el);
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}
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/**
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* サジェストを閉じます。
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*/
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private close() {
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if (this.suggestion == null) return;
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this.suggestion.$destroy();
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this.suggestion = null;
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this.textarea.focus();
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}
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/**
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* オートコンプリートする
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*/
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private complete(type, value) {
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this.close();
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const caret = this.textarea.selectionStart;
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if (type == 'user') {
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const source = this.textarea.value;
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const before = source.substr(0, caret);
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const trimmedBefore = before.substring(0, before.lastIndexOf('@'));
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const after = source.substr(caret);
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// 挿入
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this.textarea.value = trimmedBefore + '@' + value.username + ' ' + after;
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// キャレットを戻す
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this.textarea.focus();
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const pos = caret + value.username.length;
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this.textarea.setSelectionRange(pos, pos);
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} else if (type == 'emoji') {
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const source = this.textarea.value;
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const before = source.substr(0, caret);
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const trimmedBefore = before.substring(0, before.lastIndexOf(':'));
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const after = source.substr(caret);
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// 挿入
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this.textarea.value = trimmedBefore + value + after;
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// キャレットを戻す
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this.textarea.focus();
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const pos = caret + value.length;
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this.textarea.setSelectionRange(pos, pos);
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}
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}
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}
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