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| 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 | 1x 1x 9x 8x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 8x 9x 6x 6x 9x 7x 6x 6x 3x 3x 3x 6x 7x 6x 9x 2x 4x 4x 9x 4x 4x 6x 6x | import {
type FC,
type PropsWithChildren,
type ReactNode,
isValidElement,
useMemo,
createElement,
Fragment,
} from "react";
export interface TProps {
/** Locale translation message */
message: string;
}
/**
* Insert React elements to the translation message.
*
* @example
* ```tsx
* <Trans message="a{{b}}c{{d}}e">
* <h1 data-t-slot="b">B</h1>
* <p data-t-slot="d">D</p>
* </Trans>
* ```
* ↓
* ```tsx
* <>
* a<h1 data-t-slot="b">B</h1>c<p data-t-slot="d">D</p>e
* <>
* ```
*
* `data-t-slot` can be ignored if there is only one placeholder.
*
* @example
* ```tsx
* <Trans message="a{{b}}c">
* <h1>B</h1>
* </Trans>
* ```
* ↓
* ```tsx
* <>
* a<h1>B</h1>c
* </>
* ```
*/
export const Trans: FC<PropsWithChildren<TProps>> = ({ message, children }) => {
if (!message) return null;
const slices = useMemo(() => {
const slices: string[] = [];
const matchArgs = /{{(\S+?)}}/gi;
let slice: RegExpExecArray | null;
let pointer = 0;
while ((slice = matchArgs.exec(message))) {
slices.push(message.slice(pointer, slice.index), slice[1]);
pointer = slice.index + slice[0].length;
}
slices.push(message.slice(pointer));
return slices;
}, [message]);
// no template
if (slices.length === 1) return createElement(Fragment, null, message);
const slots: Record<string, ReactNode> = {};
let hasSlot = false;
for (const child of Array.isArray(children) ? children : [children]) {
if (isValidElement(child)) {
const key = (child.props as any)["data-t-slot"];
if (key) {
slots[key] = child;
hasSlot = true;
}
}
}
const copy: ReactNode[] = slices.slice();
if (hasSlot) {
for (let i = 1; i < copy.length; i += 2) {
copy[i] = slots[slices[i]] || `{{${slices[i]}}}`;
}
} else {
copy[1] = children || `{{${slices[1]}}}`;
}
return createElement(Fragment, null, copy);
};
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