1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
import * as getCaretCoordinates from 'textarea-caret';
import MkAutocomplete from '../components/autocomplete.vue';
export default {
bind(el, binding, vn) {
const self = el._autoCompleteDirective_ = {} as any;
self.x = new Autocomplete(el, vn.context, binding.value);
self.x.attach();
},
unbind(el, binding, vn) {
const self = el._autoCompleteDirective_;
self.x.detach();
}
};
/**
* オートコンプリートを管理するクラス。
*/
class Autocomplete {
private suggestion: any;
private textarea: any;
private vm: any;
private model: any;
private currentType: string;
private get text(): string {
return this.vm[this.model];
}
private set text(text: string) {
this.vm[this.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, model) {
//#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.model = model;
}
/**
* 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 caret = this.textarea.selectionStart;
const text = this.text.substr(0, caret);
const mentionIndex = text.lastIndexOf('@');
const emojiIndex = text.lastIndexOf(':');
let opened = false;
if (mentionIndex != -1 && mentionIndex > emojiIndex) {
const username = text.substr(mentionIndex + 1);
if (username != '' && username.match(/^[a-zA-Z0-9_]+$/)) {
this.open('user', username);
opened = true;
}
}
if (emojiIndex != -1 && emojiIndex > mentionIndex) {
const emoji = text.substr(emojiIndex + 1);
if (emoji != '' && emoji.match(/^[\+\-a-z0-9_]+$/)) {
this.open('emoji', emoji);
opened = true;
}
}
if (!opened) {
this.close();
}
}
/**
* サジェストを提示します。
*/
private open(type, q) {
if (type != this.currentType) {
this.close();
}
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 = x;
this.suggestion.y = y;
this.suggestion.q = q;
} else {
// サジェスト要素作成
this.suggestion = new MkAutocomplete({
propsData: {
textarea: this.textarea,
complete: this.complete,
close: this.close,
type: type,
q: q,
x,
y
}
}).$mount();
// 要素追加
document.body.appendChild(this.suggestion.$el);
}
}
/**
* サジェストを閉じます。
*/
private close() {
if (this.suggestion == null) return;
this.suggestion.$destroy();
this.suggestion = null;
this.textarea.focus();
}
/**
* オートコンプリートする
*/
private complete(type, value) {
this.close();
const caret = this.textarea.selectionStart;
if (type == 'user') {
const source = this.text;
const before = source.substr(0, caret);
const trimmedBefore = before.substring(0, before.lastIndexOf('@'));
const after = source.substr(caret);
// 挿入
this.text = trimmedBefore + '@' + value.username + ' ' + after;
// キャレットを戻す
this.vm.$nextTick(() => {
this.textarea.focus();
const pos = trimmedBefore.length + (value.username.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 + 1;
this.textarea.setSelectionRange(pos, pos);
});
}
}
}
|
