blob: 76c1fc9e062dd1c9c3563227d0977d213013ebf0 (
plain) (
blame)
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
|
import * as dom from "../shared/utils/dom";
import Key from "../shared/settings/Key";
const cancelKey = (e: KeyboardEvent): boolean => {
if (e.key === "Escape") {
return true;
}
if (e.key === "[" && e.ctrlKey) {
return true;
}
return false;
};
const modifiedKeyName = (name: string): string => {
if (name === " ") {
return "Space";
}
if (name.length === 1) {
return name;
} else if (name === "Escape") {
return "Esc";
}
return name;
};
// visible for testing
export const keyFromKeyboardEvent = (e: KeyboardEvent): Key => {
const key = modifiedKeyName(e.key);
let shift = e.shiftKey;
if (key.length === 1 && key.toUpperCase() === key.toLowerCase()) {
// make shift false for symbols to enable key bindings by symbold keys.
// But this limits key bindings by symbol keys with Shift
// (such as Shift+$>.
shift = false;
}
return new Key({
key: modifiedKeyName(e.key),
shift: shift,
ctrl: e.ctrlKey,
alt: e.altKey,
meta: e.metaKey,
});
};
export default class InputDriver {
private pressed: { [key: string]: string } = {};
private onKeyListeners: ((key: Key) => boolean)[] = [];
constructor(target: HTMLElement) {
this.pressed = {};
this.onKeyListeners = [];
target.addEventListener("keypress", this.onKeyPress.bind(this));
target.addEventListener("keydown", this.onKeyDown.bind(this));
target.addEventListener("keyup", this.onKeyUp.bind(this));
}
onKey(cb: (key: Key) => boolean) {
this.onKeyListeners.push(cb);
}
private onKeyPress(e: KeyboardEvent) {
if (this.pressed[e.key] && this.pressed[e.key] !== "keypress") {
return;
}
this.pressed[e.key] = "keypress";
this.capture(e);
}
private onKeyDown(e: KeyboardEvent) {
if (this.pressed[e.key] && this.pressed[e.key] !== "keydown") {
return;
}
this.pressed[e.key] = "keydown";
this.capture(e);
}
private onKeyUp(e: KeyboardEvent) {
delete this.pressed[e.key];
}
// eslint-disable-next-line max-statements
private capture(e: KeyboardEvent) {
const target = e.target;
if (!(target instanceof HTMLElement)) {
return;
}
if (this.fromInput(target)) {
if (cancelKey(e) && target.blur) {
target.blur();
}
return;
}
if (["Shift", "Control", "Alt", "OS"].includes(e.key)) {
// pressing only meta key is ignored
return;
}
const key = keyFromKeyboardEvent(e);
for (const listener of this.onKeyListeners) {
const stop = listener(key);
if (stop) {
e.preventDefault();
e.stopPropagation();
break;
}
}
}
private fromInput(e: Element) {
return (
e instanceof HTMLInputElement ||
e instanceof HTMLTextAreaElement ||
e instanceof HTMLSelectElement ||
dom.isContentEditable(e)
);
}
}
|
