35 lines
1019 B
JavaScript
35 lines
1019 B
JavaScript
// 放弃表单确认的唯一生命周期所有者。页面只负责把 visible 同步到自己的 ref；
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// 重复返回复用同一 Promise，确认、取消或卸载都会先清空内部状态再释放等待者。
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export const createDiscardConfirmation = (setVisible) => {
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if (typeof setVisible !== "function") {
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throw new TypeError("createDiscardConfirmation 的 setVisible 必须是函数");
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}
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let pendingPromise = null;
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let resolvePending = null;
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const settle = (confirmed) => {
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const resolve = resolvePending;
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resolvePending = null;
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pendingPromise = null;
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setVisible(false);
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resolve?.(confirmed === true);
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};
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const request = () => {
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if (pendingPromise) return pendingPromise;
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setVisible(true);
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pendingPromise = new Promise((resolve) => {
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resolvePending = resolve;
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});
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return pendingPromise;
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};
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return Object.freeze({
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request,
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confirm: () => settle(true),
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cancel: () => settle(false),
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dispose: () => settle(false),
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});
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};
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