53 lines
2.1 KiB
JavaScript
53 lines
2.1 KiB
JavaScript
require("../../../_virtual/_rolldown/runtime.js");
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const require_error = require("../../../utils/error.js");
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const require_index = require("../../../hooks/use-namespace/index.js");
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const require_index$1 = require("../../../hooks/use-forward-ref/index.js");
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let vue = require("vue");
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let _vue_shared = require("@vue/shared");
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//#region ../../packages/components/slot/src/only-child.tsx
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const NAME = "ElOnlyChild";
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const OnlyChild = /* @__PURE__ */ (0, vue.defineComponent)({
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name: NAME,
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setup(_, { slots, attrs }) {
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const forwardRefDirective = require_index$1.useForwardRefDirective((0, vue.inject)(require_index$1.FORWARD_REF_INJECTION_KEY)?.setForwardRef ?? _vue_shared.NOOP);
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return () => {
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const defaultSlot = slots.default?.(attrs);
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if (!defaultSlot) return null;
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const [firstLegitNode, length] = findFirstLegitChild(defaultSlot);
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if (!firstLegitNode) {
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require_error.debugWarn(NAME, "no valid child node found");
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return null;
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}
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if (length > 1) require_error.debugWarn(NAME, "requires exact only one valid child.");
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return (0, vue.withDirectives)((0, vue.cloneVNode)(firstLegitNode, attrs), [[forwardRefDirective]]);
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};
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}
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});
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function findFirstLegitChild(node) {
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if (!node) return [null, 0];
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const children = node;
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const len = children.filter((c) => c.type !== vue.Comment).length;
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for (const child of children) {
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/**
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* when user uses h(Fragment, [text]) to render plain string,
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* this switch case just cannot handle, when the value is primitives
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* we should just return the wrapped string
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*/
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if ((0, _vue_shared.isObject)(child)) switch (child.type) {
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case vue.Comment: continue;
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case vue.Text:
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case "svg": return [wrapTextContent(child), len];
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case vue.Fragment: return findFirstLegitChild(child.children);
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default: return [child, len];
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}
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return [wrapTextContent(child), len];
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}
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return [null, 0];
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}
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function wrapTextContent(s) {
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return (0, vue.createVNode)("span", { "class": require_index.useNamespace("only-child").e("content") }, [s]);
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}
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//#endregion
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exports.OnlyChild = OnlyChild;
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//# sourceMappingURL=only-child.js.map
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