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14 KiB
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1 line
14 KiB
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{"version":3,"names":["_core","require","_helperPluginUtils","_template","DefineAccessorHelper","template","expression","ast","_compact","_default","exports","default","declare","api","options","_api$assumption","assertVersion","setComputedProperties","assumption","loose","pushComputedProps","pushComputedPropsLoose","pushComputedPropsSpec","buildDefineAccessor","state","obj","prop","type","kind","key","computed","t","isIdentifier","stringLiteral","name","fn","getValue","helper","availableHelper","addHelper","file","get","id","scope","generateUidIdentifier","push","init","set","cloneNode","callExpression","isObjectProperty","value","isObjectMethod","functionExpression","params","body","generator","async","pushAssign","objId","expressionStatement","assignmentExpression","memberExpression","isLiteral","info","computedProps","initPropExpression","length","CHUNK_LENGTH_CAP","currentChunk","computedPropsChunks","chunk","single","node","toComputedKey","visitor","ObjectExpression","exit","path","parent","hasComputed","properties","initProps","foundComputed","isSpreadElement","generateUidIdentifierBasedOnNode","objectExpression","variableDeclaration","variableDeclarator","replaceWith","replaceWithMultiple"],"sources":["../src/index.ts"],"sourcesContent":["import { types as t } from \"@babel/core\";\nimport type { PluginPass, Scope } from \"@babel/core\";\nimport { declare } from \"@babel/helper-plugin-utils\";\nimport template from \"@babel/template\";\n\nexport interface Options {\n loose?: boolean;\n}\n\ntype PropertyInfo = {\n scope: Scope;\n objId: t.Identifier;\n body: t.Statement[];\n computedProps: t.ObjectMember[];\n initPropExpression: t.ObjectExpression;\n state: PluginPass;\n};\n\nif (!process.env.BABEL_8_BREAKING) {\n // eslint-disable-next-line no-var\n var DefineAccessorHelper = template.expression.ast`\n function (type, obj, key, fn) {\n var desc = { configurable: true, enumerable: true };\n desc[type] = fn;\n return Object.defineProperty(obj, key, desc);\n }\n `;\n // @ts-expect-error undocumented _compact node property\n DefineAccessorHelper._compact = true;\n}\n\nexport default declare((api, options: Options) => {\n api.assertVersion(REQUIRED_VERSION(7));\n\n const setComputedProperties =\n api.assumption(\"setComputedProperties\") ?? options.loose;\n\n const pushComputedProps = setComputedProperties\n ? pushComputedPropsLoose\n : pushComputedPropsSpec;\n\n function buildDefineAccessor(\n state: PluginPass,\n obj: t.Expression,\n prop: t.ObjectMethod,\n ) {\n const type = prop.kind as \"get\" | \"set\";\n const key =\n !prop.computed && t.isIdentifier(prop.key)\n ? t.stringLiteral(prop.key.name)\n : prop.key;\n const fn = getValue(prop);\n if (process.env.BABEL_8_BREAKING) {\n return t.callExpression(state.addHelper(\"defineAccessor\"), [\n t.stringLiteral(type),\n obj,\n key,\n fn,\n ]);\n } else {\n let helper: t.Identifier;\n if (state.availableHelper(\"defineAccessor\")) {\n helper = state.addHelper(\"defineAccessor\");\n } else {\n // Fallback for @babel/helpers <= 7.20.6, manually add helper function\n const file = state.file;\n helper = file.get(\"fallbackDefineAccessorHelper\");\n if (!helper) {\n const id = file.scope.generateUidIdentifier(\"defineAccessor\");\n 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getValue(prop),\n ),\n ),\n );\n }\n\n function pushComputedPropsLoose(info: PropertyInfo) {\n const { computedProps, state, initPropExpression, objId, body } = info;\n\n for (const prop of computedProps) {\n if (\n t.isObjectMethod(prop) &&\n (prop.kind === \"get\" || prop.kind === \"set\")\n ) {\n if (computedProps.length === 1) {\n return buildDefineAccessor(state, initPropExpression, prop);\n } else {\n body.push(\n t.expressionStatement(\n buildDefineAccessor(state, t.cloneNode(objId), prop),\n ),\n );\n }\n } else {\n pushAssign(t.cloneNode(objId), prop, body);\n }\n }\n }\n\n function pushComputedPropsSpec(info: PropertyInfo) {\n const { objId, body, computedProps, state } = info;\n\n // To prevent too deep AST structures in case of large objects\n const CHUNK_LENGTH_CAP = 10;\n\n let currentChunk: t.ObjectMember[] = null;\n const computedPropsChunks: Array<t.ObjectMember[]> = [];\n for (const prop of computedProps) {\n if (!currentChunk || currentChunk.length === CHUNK_LENGTH_CAP) {\n currentChunk = [];\n computedPropsChunks.push(currentChunk);\n }\n currentChunk.push(prop);\n }\n\n for (const chunk of computedPropsChunks) {\n const single = computedPropsChunks.length === 1;\n let node: t.Expression = single\n ? info.initPropExpression\n : t.cloneNode(objId);\n for (const prop of chunk) {\n if (\n t.isObjectMethod(prop) &&\n (prop.kind === \"get\" || prop.kind === \"set\")\n ) {\n node = buildDefineAccessor(info.state, node, prop);\n } else {\n node = t.callExpression(state.addHelper(\"defineProperty\"), [\n node,\n // PrivateName must not be in ObjectExpression\n t.toComputedKey(prop) as t.Expression,\n // the value of ObjectProperty in ObjectExpression must be an expression\n getValue(prop),\n ]);\n }\n }\n if (single) return node;\n body.push(t.expressionStatement(node));\n }\n }\n\n return {\n name: \"transform-computed-properties\",\n\n visitor: {\n ObjectExpression: {\n exit(path, state) {\n const { node, parent, scope } = path;\n let hasComputed = false;\n for (const prop of node.properties) {\n // @ts-expect-error SpreadElement must not have computed property\n hasComputed = prop.computed === true;\n if (hasComputed) break;\n }\n if (!hasComputed) return;\n\n // put all getters/setters into the first object expression as well as all initialisers up\n // to the first computed property\n\n const initProps: t.ObjectMember[] = [];\n const computedProps: t.ObjectMember[] = [];\n let foundComputed = false;\n\n for (const prop of node.properties) {\n if (t.isSpreadElement(prop)) {\n continue;\n }\n if (prop.computed) {\n foundComputed = true;\n }\n\n if (foundComputed) {\n computedProps.push(prop);\n } else {\n initProps.push(prop);\n }\n }\n\n const objId = scope.generateUidIdentifierBasedOnNode(parent);\n const initPropExpression = t.objectExpression(initProps);\n const body = [];\n\n body.push(\n t.variableDeclaration(\"var\", [\n t.variableDeclarator(objId, initPropExpression),\n ]),\n );\n\n const single = 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