egirlskey/src/web/app/desktop/scripts/autocomplete.ts

133 lines
3.1 KiB
TypeScript
Raw Normal View History

2017-11-13 09:05:35 +00:00
import getCaretCoordinates = require('textarea-caret');
2017-03-18 11:05:11 +00:00
import * as riot from 'riot';
2017-02-18 08:18:31 +00:00
/**
*
*/
class Autocomplete {
2017-11-13 09:05:35 +00:00
private suggestion: any;
private textarea: any;
2017-02-18 08:18:31 +00:00
/**
*
*/
constructor(textarea) {
2017-02-18 23:09:55 +00:00
// BIND ---------------------------------
this.onInput = this.onInput.bind(this);
this.complete = this.complete.bind(this);
this.close = this.close.bind(this);
// --------------------------------------
2017-02-18 08:18:31 +00:00
this.suggestion = null;
this.textarea = textarea;
}
/**
*
*/
2017-11-13 09:05:35 +00:00
public attach() {
2017-02-18 08:18:31 +00:00
this.textarea.addEventListener('input', this.onInput);
}
/**
*
*/
2017-11-13 09:05:35 +00:00
public detach() {
2017-02-18 08:18:31 +00:00
this.textarea.removeEventListener('input', this.onInput);
this.close();
}
/**
2017-11-13 09:05:35 +00:00
*
2017-02-18 08:18:31 +00:00
*/
2017-11-13 09:05:35 +00:00
private onInput() {
2017-02-18 08:18:31 +00:00
this.close();
const caret = this.textarea.selectionStart;
const text = this.textarea.value.substr(0, caret);
const mentionIndex = text.lastIndexOf('@');
if (mentionIndex == -1) return;
const username = text.substr(mentionIndex + 1);
if (!username.match(/^[a-zA-Z0-9-]+$/)) return;
this.open('user', username);
}
/**
2017-11-13 09:05:35 +00:00
*
2017-02-18 08:18:31 +00:00
*/
2017-11-13 09:05:35 +00:00
private open(type, q) {
2017-02-18 08:18:31 +00:00
// 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
const tag = document.createElement('mk-autocomplete-suggestion');
2017-02-18 08:18:31 +00:00
// ~ 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 + window.pageXOffset + caretPosition.left;
const y = rect.top + window.pageYOffset + caretPosition.top;
tag.style.left = x + 'px';
tag.style.top = y + 'px';
2017-02-18 08:18:31 +00:00
// 要素追加
const el = document.body.appendChild(tag);
2017-02-18 08:18:31 +00:00
// マウント
2017-11-13 09:05:35 +00:00
this.suggestion = (riot as any).mount(el, {
2017-02-18 08:18:31 +00:00
textarea: this.textarea,
complete: this.complete,
close: this.close,
type: type,
q: q
})[0];
}
/**
2017-11-13 09:05:35 +00:00
*
2017-02-18 08:18:31 +00:00
*/
2017-11-13 09:05:35 +00:00
private close() {
2017-02-18 22:24:31 +00:00
if (this.suggestion == null) return;
2017-02-18 08:18:31 +00:00
this.suggestion.unmount();
this.suggestion = null;
this.textarea.focus();
}
/**
2017-11-13 09:05:35 +00:00
*
2017-02-18 08:18:31 +00:00
*/
2017-11-13 09:05:35 +00:00
private complete(user) {
2017-02-18 08:18:31 +00:00
this.close();
const value = user.username;
const caret = this.textarea.selectionStart;
const source = this.textarea.value;
const before = source.substr(0, caret);
2017-02-27 08:01:26 +00:00
const trimmedBefore = before.substring(0, before.lastIndexOf('@'));
2017-02-18 08:18:31 +00:00
const after = source.substr(caret);
// 結果を挿入する
2017-02-27 08:01:26 +00:00
this.textarea.value = trimmedBefore + '@' + value + ' ' + after;
2017-02-18 08:18:31 +00:00
// キャレットを戻す
this.textarea.focus();
const pos = caret + value.length;
this.textarea.setSelectionRange(pos, pos);
}
}
2017-03-18 11:05:11 +00:00
export default Autocomplete;