73 lines
2 KiB
JavaScript
73 lines
2 KiB
JavaScript
import { useContext, useState, useRef, useLayoutEffect } from 'react';
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import NamespaceContext from './NamespaceContext.js';
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import SpreadsheetContext from './SpreadsheetContext';
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function unresolveName(name) {
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let idx = name.indexOf('!');
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if (idx !== -1) {
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return {
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sheet: name.slice(0, idx),
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name: name.slice(idx + 1)
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};
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}
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return { sheet: null, name };
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}
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export default function useSheetValue(binding, onChange) {
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if (!binding) {
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throw new Error('SheetValue binding is required');
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}
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if (global.IS_TESTING && typeof binding !== 'string' && !binding.name) {
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binding = { ...binding, name: binding.value.toString() };
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}
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binding =
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typeof binding === 'string' ? { name: binding, value: null } : binding;
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if (binding.name == null) {
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throw new Error('Binding name is now required');
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}
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// Get the current sheet name, and unresolve the binding name if
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// necessary (you might pass a fully resolve name like foo!name)
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let sheetName = useContext(NamespaceContext) || '__global';
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let unresolved = unresolveName(binding.name);
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if (unresolved.sheet) {
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sheetName = unresolved.sheet;
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binding = { ...binding, name: unresolved.name };
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}
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let spreadsheet = useContext(SpreadsheetContext);
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let [result, setResult] = useState({
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name: sheetName + '!' + binding.name,
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value: binding.value === undefined ? null : binding.value,
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query: binding.query
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});
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let latestOnChange = useRef(onChange);
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let latestValue = useRef(result.value);
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useLayoutEffect(() => {
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latestOnChange.current = onChange;
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latestValue.current = result.value;
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});
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useLayoutEffect(() => {
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if (binding.query) {
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spreadsheet.createQuery(sheetName, binding.name, binding.query);
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}
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return spreadsheet.bind(sheetName, binding, null, newResult => {
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if (latestOnChange.current) {
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latestOnChange.current(newResult);
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}
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if (newResult.value !== latestValue.current) {
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setResult(newResult);
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}
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});
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}, [sheetName, binding.name]);
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return result.value;
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}
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