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switched/src/web/app/common/views/directives/autocomplete.ts

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import * as getCaretCoordinates from 'textarea-caret';
import MkAutocomplete from '../components/autocomplete.vue';
export default {
bind(el, binding, vn) {
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const self = el._autoCompleteDirective_ = {} as any;
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self.x = new Autocomplete(el);
self.x.attach();
},
unbind(el, binding, vn) {
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const self = el._autoCompleteDirective_;
self.x.detach();
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}
};
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/**
*
*/
class Autocomplete {
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private suggestion: any;
private textarea: any;
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/**
*
*/
constructor(textarea) {
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//#region BIND
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);
//#endregion
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this.suggestion = null;
this.textarea = textarea;
}
/**
*
*/
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public attach() {
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this.textarea.addEventListener('input', this.onInput);
}
/**
*
*/
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public detach() {
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this.textarea.removeEventListener('input', this.onInput);
this.close();
}
/**
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*
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*/
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private onInput() {
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this.close();
const caret = this.textarea.selectionStart;
const text = this.textarea.value.substr(0, caret);
const mentionIndex = text.lastIndexOf('@');
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const emojiIndex = text.lastIndexOf(':');
if (mentionIndex != -1 && mentionIndex > emojiIndex) {
const username = text.substr(mentionIndex + 1);
if (!username.match(/^[a-zA-Z0-9-]+$/)) return;
this.open('user', username);
}
if (emojiIndex != -1 && emojiIndex > mentionIndex) {
const emoji = text.substr(emojiIndex + 1);
if (!emoji.match(/^[\+\-a-z_]+$/)) return;
this.open('emoji', emoji);
}
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}
/**
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*
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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
this.close();
// サジェスト要素作成
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this.suggestion = new MkAutocomplete({
propsData: {
textarea: this.textarea,
complete: this.complete,
close: this.close,
type: type,
q: q
}
}).$mount();
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//#region サジェストを表示すべき位置を計算
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const caretPosition = getCaretCoordinates(this.textarea, this.textarea.selectionStart);
const rect = this.textarea.getBoundingClientRect();
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const x = rect.left + window.pageXOffset + caretPosition.left - this.textarea.scrollLeft;
const y = rect.top + window.pageYOffset + caretPosition.top - this.textarea.scrollTop;
//#endregion
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this.suggestion.$el.style.left = x + 'px';
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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*/
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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;
this.textarea.focus();
}
/**
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*
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*/
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private complete(type, value) {
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this.close();
const caret = this.textarea.selectionStart;
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if (type == 'user') {
const source = this.textarea.value;
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const before = source.substr(0, caret);
const trimmedBefore = before.substring(0, before.lastIndexOf('@'));
const after = source.substr(caret);
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// 挿入
this.textarea.value = trimmedBefore + '@' + value.username + ' ' + after;
// キャレットを戻す
this.textarea.focus();
const pos = caret + value.username.length;
this.textarea.setSelectionRange(pos, pos);
} else if (type == 'emoji') {
const source = this.textarea.value;
const before = source.substr(0, caret);
const trimmedBefore = before.substring(0, before.lastIndexOf(':'));
const after = source.substr(caret);
// 挿入
this.textarea.value = trimmedBefore + value + after;
// キャレットを戻す
this.textarea.focus();
const pos = caret + value.length;
this.textarea.setSelectionRange(pos, pos);
}
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}
}