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14 KiB
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{"version":3,"names":["_t","require","FLIPPED_ALIAS_KEYS","isArrayExpression","isAssignmentExpression","isBinary","isBlockStatement","isCallExpression","isFunction","isIdentifier","isLiteral","isMemberExpression","isObjectExpression","isOptionalCallExpression","isOptionalMemberExpression","isStringLiteral","crawlInternal","node","state","object","computed","property","left","right","hasCall","callee","hasFunction","hasHelper","isHelper","crawl","name","charCodeAt","isType","nodes","exports","AssignmentExpression","SwitchCase","parent","consequent","length","cases","LogicalExpression","Literal","value","CallExpression","OptionalCallExpression","VariableDeclaration","i","declarations","declar","enabled","id","init","IfStatement","ObjectProperty","ObjectTypeProperty","ObjectMethod","properties","ObjectTypeCallProperty","_parent$properties","callProperties","ObjectTypeIndexer","_parent$properties2","_parent$callPropertie","indexers","ObjectTypeInternalSlot","_parent$properties3","_parent$callPropertie2","_parent$indexers","internalSlots","forEach","type","amounts","concat","ret"],"sources":["../../src/node/whitespace.ts"],"sourcesContent":["import {\n FLIPPED_ALIAS_KEYS,\n isArrayExpression,\n isAssignmentExpression,\n isBinary,\n isBlockStatement,\n isCallExpression,\n isFunction,\n isIdentifier,\n isLiteral,\n isMemberExpression,\n isObjectExpression,\n isOptionalCallExpression,\n isOptionalMemberExpression,\n isStringLiteral,\n} from \"@babel/types\";\nimport * as charCodes from \"charcodes\";\n\nimport type { NodeHandlers } from \"./index.ts\";\n\nimport type * as t from \"@babel/types\";\n\nconst enum WhitespaceFlag {\n before = 1 << 0,\n after = 1 << 1,\n}\n\nexport type { WhitespaceFlag };\n\nfunction crawlInternal(\n node: t.Node,\n state: { hasCall: boolean; hasFunction: boolean; hasHelper: boolean },\n) {\n if (!node) return state;\n\n if (isMemberExpression(node) || isOptionalMemberExpression(node)) {\n crawlInternal(node.object, state);\n if (node.computed) crawlInternal(node.property, state);\n } else if (isBinary(node) || isAssignmentExpression(node)) {\n crawlInternal(node.left, state);\n crawlInternal(node.right, state);\n } else if (isCallExpression(node) || isOptionalCallExpression(node)) {\n state.hasCall = true;\n crawlInternal(node.callee, state);\n } else if (isFunction(node)) {\n state.hasFunction = true;\n } else if (isIdentifier(node)) {\n state.hasHelper =\n // @ts-expect-error todo(flow->ts): node.callee is not really expected here…\n state.hasHelper || (node.callee && isHelper(node.callee));\n }\n\n return state;\n}\n\n/**\n * Crawl a node to test if it contains a CallExpression, a Function, or a Helper.\n *\n * @example\n * crawl(node)\n * // { hasCall: false, hasFunction: true, hasHelper: false }\n */\n\nfunction crawl(node: t.Node) {\n return crawlInternal(node, {\n hasCall: false,\n hasFunction: false,\n hasHelper: false,\n });\n}\n\n/**\n * Test if a node is or has a helper.\n */\n\nfunction isHelper(node: t.Node): boolean {\n if (!node) return false;\n\n if (isMemberExpression(node)) {\n return isHelper(node.object) || isHelper(node.property);\n } else if (isIdentifier(node)) {\n return (\n node.name === \"require\" ||\n node.name.charCodeAt(0) === charCodes.underscore\n );\n } else if (isCallExpression(node)) {\n return isHelper(node.callee);\n } else if (isBinary(node) || isAssignmentExpression(node)) {\n return (\n (isIdentifier(node.left) && isHelper(node.left)) || isHelper(node.right)\n );\n } else {\n return false;\n }\n}\n\nfunction isType(node: t.Node) {\n return (\n isLiteral(node) ||\n isObjectExpression(node) ||\n isArrayExpression(node) ||\n isIdentifier(node) ||\n isMemberExpression(node)\n );\n}\n\n/**\n * Tests for node types that need whitespace.\n */\n\nexport const nodes: NodeHandlers<WhitespaceFlag> = {\n /**\n * Test if AssignmentExpression needs whitespace.\n */\n\n AssignmentExpression(node: t.AssignmentExpression): WhitespaceFlag {\n const state = crawl(node.right);\n if ((state.hasCall && state.hasHelper) || state.hasFunction) {\n return state.hasFunction\n ? WhitespaceFlag.before | WhitespaceFlag.after\n : WhitespaceFlag.after;\n }\n },\n\n /**\n * Test if SwitchCase needs whitespace.\n */\n\n SwitchCase(node: t.SwitchCase, parent: t.SwitchStatement): WhitespaceFlag {\n return (\n (!!node.consequent.length || parent.cases[0] === node\n ? WhitespaceFlag.before\n : 0) |\n (!node.consequent.length && parent.cases[parent.cases.length - 1] === node\n ? WhitespaceFlag.after\n : 0)\n );\n },\n\n /**\n * Test if LogicalExpression needs whitespace.\n */\n\n LogicalExpression(node: t.LogicalExpression): WhitespaceFlag {\n if (isFunction(node.left) || isFunction(node.right)) {\n return WhitespaceFlag.after;\n }\n },\n\n /**\n * Test if Literal needs whitespace.\n */\n\n Literal(node: t.Literal): WhitespaceFlag {\n if (isStringLiteral(node) && node.value === \"use strict\") {\n return WhitespaceFlag.after;\n }\n },\n\n /**\n * Test if CallExpressionish needs whitespace.\n */\n\n CallExpression(node: t.CallExpression): WhitespaceFlag {\n if (isFunction(node.callee) || isHelper(node)) {\n return WhitespaceFlag.before | WhitespaceFlag.after;\n }\n },\n\n OptionalCallExpression(node: t.OptionalCallExpression): WhitespaceFlag {\n if (isFunction(node.callee)) {\n return WhitespaceFlag.before | WhitespaceFlag.after;\n }\n },\n\n /**\n * Test if VariableDeclaration needs whitespace.\n */\n\n VariableDeclaration(node: t.VariableDeclaration): WhitespaceFlag {\n for (let i = 0; i < node.declarations.length; i++) {\n const declar = node.declarations[i];\n\n let enabled = isHelper(declar.id) && !isType(declar.init);\n if (!enabled && declar.init) {\n const state = crawl(declar.init);\n enabled = (isHelper(declar.init) && state.hasCall) || state.hasFunction;\n }\n\n if (enabled) {\n return WhitespaceFlag.before | WhitespaceFlag.after;\n }\n }\n },\n\n /**\n * Test if IfStatement needs whitespace.\n */\n\n IfStatement(node: t.IfStatement): WhitespaceFlag {\n if (isBlockStatement(node.consequent)) {\n return WhitespaceFlag.before | WhitespaceFlag.after;\n }\n },\n};\n\n/**\n * Test if Property needs whitespace.\n */\n\nnodes.ObjectProperty =\n nodes.ObjectTypeProperty =\n nodes.ObjectMethod =\n function (\n node: t.ObjectProperty | t.ObjectTypeProperty | t.ObjectMethod,\n parent: t.ObjectExpression,\n ): WhitespaceFlag {\n if (parent.properties[0] === node) {\n return WhitespaceFlag.before;\n }\n };\n\nnodes.ObjectTypeCallProperty = function (\n node: t.ObjectTypeCallProperty,\n parent: t.ObjectTypeAnnotation,\n): WhitespaceFlag {\n if (parent.callProperties[0] === node && !parent.properties?.length) {\n return WhitespaceFlag.before;\n }\n};\n\nnodes.ObjectTypeIndexer = function (\n node: t.ObjectTypeIndexer,\n parent: t.ObjectTypeAnnotation,\n): WhitespaceFlag {\n if (\n parent.indexers[0] === node &&\n !parent.properties?.length &&\n !parent.callProperties?.length\n ) {\n return WhitespaceFlag.before;\n }\n};\n\nnodes.ObjectTypeInternalSlot = function (\n node: t.ObjectTypeInternalSlot,\n parent: t.ObjectTypeAnnotation,\n): WhitespaceFlag {\n if (\n parent.internalSlots[0] === node &&\n !parent.properties?.length &&\n !parent.callProperties?.length &&\n !parent.indexers?.length\n ) {\n return WhitespaceFlag.before;\n }\n};\n\n/**\n * Add whitespace tests for nodes and their aliases.\n */\n\n(\n [\n [\"Function\", true],\n [\"Class\", true],\n [\"Loop\", true],\n [\"LabeledStatement\", true],\n [\"SwitchStatement\", true],\n [\"TryStatement\", true],\n ] as const\n).forEach(function ([type, amounts]) {\n [type as string]\n .concat(FLIPPED_ALIAS_KEYS[type] || [])\n .forEach(function (type) {\n const ret = amounts ? WhitespaceFlag.before | WhitespaceFlag.after : 0;\n nodes[type] = () => ret;\n 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