69 lines
2.3 KiB
TypeScript
69 lines
2.3 KiB
TypeScript
/*
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Copyright 2020 The Matrix.org Foundation C.I.C.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import React from "react";
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import {IState, RovingTabIndexProvider} from "./RovingTabIndex";
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import {Key} from "../Keyboard";
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interface IProps extends Omit<React.HTMLProps<HTMLDivElement>, "onKeyDown"> {
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}
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// This component implements the Toolbar design pattern from the WAI-ARIA Authoring Practices guidelines.
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// https://www.w3.org/TR/wai-aria-practices-1.1/#toolbar
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// All buttons passed in children must use RovingTabIndex to set `onFocus`, `isActive`, `ref`
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const Toolbar: React.FC<IProps> = ({children, ...props}) => {
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const onKeyDown = (ev: React.KeyboardEvent, state: IState) => {
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const target = ev.target as HTMLElement;
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let handled = true;
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// HOME and END are handled by RovingTabIndexProvider
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switch (ev.key) {
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case Key.ARROW_UP:
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case Key.ARROW_DOWN:
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if (target.hasAttribute('aria-haspopup')) {
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target.click();
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}
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break;
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case Key.ARROW_LEFT:
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case Key.ARROW_RIGHT:
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if (state.refs.length > 0) {
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const i = state.refs.findIndex(r => r === state.activeRef);
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const delta = ev.key === Key.ARROW_RIGHT ? 1 : -1;
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state.refs.slice((i + delta) % state.refs.length)[0].current.focus();
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}
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break;
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default:
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handled = false;
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}
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if (handled) {
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ev.preventDefault();
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ev.stopPropagation();
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}
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};
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return <RovingTabIndexProvider handleHomeEnd={true} onKeyDown={onKeyDown}>
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{({onKeyDownHandler}) => <div {...props} onKeyDown={onKeyDownHandler} role="toolbar">
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{ children }
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</div>}
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</RovingTabIndexProvider>;
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};
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export default Toolbar;
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