imterah/element-portable
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Make space hierarchy a treeview

Browse source
This commit is contained in:
Michael Telatynski 2021-08-09 10:29:55 +01:00
parent 6fddfe0d59
commit 09f20bcda7
4 changed files with 289 additions and 184 deletions
Download patch file Download diff file Expand all files Collapse all files

52
src/accessibility/RovingTabIndex.tsx
View file

@ -150,13 +150,14 @@ const reducer = (state: IState, action: IAction) => {
interface IProps {
handleHomeEnd?: boolean;
handleUpDown?: boolean;
children(renderProps: {
onKeyDownHandler(ev: React.KeyboardEvent);
});
onKeyDown?(ev: React.KeyboardEvent, state: IState);
}
export const RovingTabIndexProvider: React.FC<IProps> = ({ children, handleHomeEnd, onKeyDown }) => {
export const RovingTabIndexProvider: React.FC<IProps> = ({ children, handleHomeEnd, handleUpDown, onKeyDown }) => {
const [state, dispatch] = useReducer<Reducer<IState, IAction>>(reducer, {
activeRef: null,
refs: [],
@ -167,21 +168,50 @@ export const RovingTabIndexProvider: React.FC<IProps> = ({ children, handleHomeE
const onKeyDownHandler = useCallback((ev) => {
let handled = false;
// Don't interfere with input default keydown behaviour
if (handleHomeEnd && ev.target.tagName !== "INPUT" && ev.target.tagName !== "TEXTAREA") {
if (ev.target.tagName !== "INPUT" && ev.target.tagName !== "TEXTAREA") {
// check if we actually have any items
switch (ev.key) {
case Key.HOME:
handled = true;
// move focus to first item
if (context.state.refs.length > 0) {
context.state.refs[0].current.focus();
if (handleHomeEnd) {
handled = true;
// move focus to first item
if (context.state.refs.length > 0) {
context.state.refs[0].current.focus();
}
}
break;
case Key.END:
handled = true;
// move focus to last item
if (context.state.refs.length > 0) {
context.state.refs[context.state.refs.length - 1].current.focus();
if (handleHomeEnd) {
handled = true;
// move focus to last item
if (context.state.refs.length > 0) {
context.state.refs[context.state.refs.length - 1].current.focus();
}
}
break;
case Key.ARROW_UP:
if (handleUpDown) {
handled = true;
if (context.state.refs.length > 0) {
const idx = context.state.refs.indexOf(context.state.activeRef);
if (idx > 1) {
context.state.refs[idx - 1].current.focus();
}
}
}
break;
case Key.ARROW_DOWN:
if (handleUpDown) {
handled = true;
if (context.state.refs.length > 0) {
const idx = context.state.refs.indexOf(context.state.activeRef);
if (idx < context.state.refs.length - 1) {
context.state.refs[idx + 1].current.focus();
}
}
}
break;
}
@ -193,7 +223,7 @@ export const RovingTabIndexProvider: React.FC<IProps> = ({ children, handleHomeE
} else if (onKeyDown) {
return onKeyDown(ev, context.state);
}
}, [context.state, onKeyDown, handleHomeEnd]);
}, [context.state, onKeyDown, handleHomeEnd, handleUpDown]);
return <RovingTabIndexContext.Provider value={context}>
{ children({ onKeyDownHandler }) }