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
|
import React, { useContext, useEffect, useMemo, useState } from 'react';
let groupCounter = 0;
function getNewId() {
return groupCounter++;
}
interface IAriaControlContext {
controlledId: string;
}
const AriaControlContext = React.createContext<IAriaControlContext>({
get controlledId(): string {
throw new Error('Missing AriaControlContext.Provider');
},
});
interface IAriaGroupProps {
children: React.ReactNode;
}
export function AriaControlGroup(props: IAriaGroupProps) {
const id = useMemo(getNewId, []);
const contextValue = useMemo(() => ({ controlledId: `${id}-controlled` }), []);
return (
<AriaControlContext.Provider value={contextValue}>{props.children}</AriaControlContext.Provider>
);
}
interface IAriaDescriptionContext {
descriptionId?: string;
setHasDescription: (value: boolean) => void;
}
const AriaDescriptionContext = React.createContext<IAriaDescriptionContext>({
setHasDescription(_value) {
throw new Error('Missing AriaDescriptionContext.Provider');
},
});
export function AriaDescriptionGroup(props: IAriaGroupProps) {
const id = useMemo(getNewId, []);
const [hasDescription, setHasDescription] = useState(false);
const contextValue = useMemo(
() => ({
descriptionId: hasDescription ? `${id}-description` : undefined,
setHasDescription,
}),
[hasDescription],
);
return (
<AriaDescriptionContext.Provider value={contextValue}>
{props.children}
</AriaDescriptionContext.Provider>
);
}
interface IAriaInputContext {
inputId: string;
labelId?: string;
setHasLabel: (value: boolean) => void;
}
const missingAriaInputContextError = new Error('Missing AriaInputContext.Provider');
const AriaInputContext = React.createContext<IAriaInputContext>({
get inputId(): string {
throw missingAriaInputContextError;
},
setHasLabel() {
throw missingAriaInputContextError;
},
});
export function AriaInputGroup(props: IAriaGroupProps) {
const id = useMemo(getNewId, []);
const [hasLabel, setHasLabel] = useState(false);
const contextValue = useMemo(
() => ({
inputId: `${id}-input`,
labelId: hasLabel ? `${id}-label` : undefined,
setHasLabel,
}),
[hasLabel],
);
return (
<AriaDescriptionGroup>
<AriaInputContext.Provider value={contextValue}>{props.children}</AriaInputContext.Provider>
</AriaDescriptionGroup>
);
}
interface IAriaElementProps {
children: React.ReactElement;
}
export function AriaControlled(props: IAriaElementProps) {
const { controlledId } = useContext(AriaControlContext);
return React.cloneElement(props.children, { id: controlledId });
}
export function AriaControls(props: IAriaElementProps) {
const { controlledId } = useContext(AriaControlContext);
return React.cloneElement(props.children, { 'aria-controls': controlledId });
}
export function AriaInput(props: IAriaElementProps) {
const { inputId, labelId } = useContext(AriaInputContext);
return (
<AriaDescribed>
{React.cloneElement(props.children, {
id: inputId,
'aria-labelledby': labelId,
})}
</AriaDescribed>
);
}
export function AriaLabel(props: IAriaElementProps) {
const { inputId, labelId, setHasLabel } = useContext(AriaInputContext);
useEffect(() => {
setHasLabel(true);
return () => setHasLabel(false);
}, []);
return React.cloneElement(props.children, {
id: labelId,
htmlFor: inputId,
});
}
export function AriaDescribed(props: IAriaElementProps) {
const { descriptionId } = useContext(AriaDescriptionContext);
return React.cloneElement(props.children, {
'aria-describedby': descriptionId,
});
}
export function AriaDescription(props: IAriaElementProps) {
const { descriptionId, setHasDescription } = useContext(AriaDescriptionContext);
useEffect(() => {
setHasDescription(true);
return () => setHasDescription(false);
}, []);
return React.cloneElement(props.children, {
id: descriptionId,
});
}
|
