@itwin/core-react
Version:
A react component library of iTwin.js UI general purpose components
75 lines • 3.12 kB
JavaScript
/*---------------------------------------------------------------------------------------------
* Copyright (c) Bentley Systems, Incorporated. All rights reserved.
* See LICENSE.md in the project root for license terms and full copyright notice.
*--------------------------------------------------------------------------------------------*/
/** @packageDocumentation
* @module ContextMenu
*/
import * as React from "react";
/** Finds a tilde character in ContextMenu item label for hot key support
* @internal
*/
export class TildeFinder {
/**
* Find character following a tilde character within a React.ReactNode.
* @param node react node to search within for a tilde.
* @returns character that was found, and the same node with tilde removed, and following character with an underline.
*/
static findAfterTilde = (node) => {
if (typeof node === "string") {
// String
const tildeIndex = node.indexOf("~");
if (tildeIndex !== -1 && tildeIndex <= node.length - 2) {
const ch = node.charAt(tildeIndex + 1);
const s1 = node.substring(0, tildeIndex);
const n = React.createElement("u", { key: "hotkey" }, ch);
const s2 = node.substring(tildeIndex + 2);
return { character: ch.toUpperCase(), node: [s1, n, s2] };
}
}
else if (node && typeof node === "object") {
if (Array.isArray(node)) {
// Array
let ret = {
character: undefined,
node,
};
node = node.map((child) => {
const r = TildeFinder.findAfterTilde(child);
if (r.character) {
// if character is found, modify node instead of returning unmodified child.
ret = r;
return r.node;
}
return child;
});
if (ret.character) {
return { character: ret.character, node };
}
}
else if (React.isValidElement(node)) {
// React Node
const ret = {
character: undefined,
node,
};
ret.node = React.cloneElement(node, {
children: React.Children.map(node.props.children, (child) => {
const r = TildeFinder.findAfterTilde(child);
if (r.character) {
// if character is found, modify node instead of returning unmodified child.
ret.character = r.character;
return r.node;
}
return child;
}),
});
if (ret.character) {
return ret;
}
}
}
return { character: undefined, node };
};
}
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