Diffusion Open Access Compliance Check Tool (OACCT) (issn4frontend) Browse

rOACCT/node_modules/@babel/preset-modules/src/plugins/transform-jsx-spread/index.js
49c99f97fe9aissn4frontend

index.js
View Options

			import esutils from "esutils";

			/**
			* Converts JSX Spread arguments into Object Spread, avoiding Babel's helper or Object.assign injection.
			* Input:
			* <div a="1" {...b} />
			* Output:
			* <div {...{ a: "1", ...b }} />
			* ...which Babel converts to:
			* h("div", { a: "1", ...b })
			*/
			export default ({ types: t }) => {
			// converts a set of JSXAttributes to an Object.assign() call
			function convertAttributesAssign(attributes) {
			const args = [];
			for (let i = 0, current; i < attributes.length; i++) {
			const node = attributes[i];
			if (t.isJSXSpreadAttribute(node)) {
			// the first attribute is a spread, avoid copying all other attributes onto it
			if (i === 0) {
			args.push(t.objectExpression([]));
			}
			current = null;
			args.push(node.argument);
			} else {
			const name = getAttributeName(node);
			const value = getAttributeValue(node);
			if (!current) {
			current = t.objectExpression([]);
			args.push(current);
			}
			current.properties.push(t.objectProperty(name, value));
			}
			}
			return t.callExpression(
			t.memberExpression(t.identifier("Object"), t.identifier("assign")),
			args
			);
			}

			// Converts a JSXAttribute to the equivalent ObjectExpression property
			function convertAttributeSpread(node) {
			if (t.isJSXSpreadAttribute(node)) {
			return t.spreadElement(node.argument);
			}

			const name = getAttributeName(node);
			const value = getAttributeValue(node);
			return t.inherits(t.objectProperty(name, value), node);
			}

			// Convert a JSX attribute name to an Object expression property name
			function getAttributeName(node) {
			if (t.isJSXNamespacedName(node.name)) {
			return t.stringLiteral(
			node.name.namespace.name + ":" + node.name.name.name
			);
			}
			if (esutils.keyword.isIdentifierNameES6(node.name.name)) {
			return t.identifier(node.name.name);
			}
			return t.stringLiteral(node.name.name);
			}

			// Convert a JSX attribute value to a JavaScript expression value
			function getAttributeValue(node) {
			let value = node.value \|\| t.booleanLiteral(true);

			if (t.isJSXExpressionContainer(value)) {
			value = value.expression;
			} else if (t.isStringLiteral(value)) {
			value.value = value.value.replace(/\n\s+/g, " ");

			// "raw" JSXText should not be used from a StringLiteral because it needs to be escaped.
			if (value.extra && value.extra.raw) {
			delete value.extra.raw;
			}
			}

			return value;
			}

			return {
			name: "transform-jsx-spread",
			visitor: {
			JSXOpeningElement(path, state) {
			const useSpread = state.opts.useSpread === true;
			const hasSpread = path.node.attributes.some(attr =>
			t.isJSXSpreadAttribute(attr)
			);

			// ignore JSX Elements without spread or with lone spread:
			if (!hasSpread \|\| path.node.attributes.length === 1) return;

			if (useSpread) {
			path.node.attributes = [
			t.jsxSpreadAttribute(
			t.objectExpression(
			path.node.attributes.map(convertAttributeSpread)
			)
			),
			];
			} else {
			path.node.attributes = [
			t.jsxSpreadAttribute(convertAttributesAssign(path.node.attributes)),
			];
			}
			},
			},
			};
			};