forked from M3-Academy/challenge-algorithms-v2.0
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8.1 KiB
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8.1 KiB
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{"version":3,"names":["VISITOR_KEYS","TraversalContext","constructor","scope","opts","state","parentPath","queue","priorityQueue","shouldVisit","node","enter","exit","type","keys","length","key","create","container","listKey","NodePath","get","parent","maybeQueue","path","notPriority","push","visitMultiple","visitQueue","visitSingle","visited","WeakSet","stop","resync","contexts","pushContext","has","add","visit","popContext","nodes","Array","isArray"],"sources":["../src/context.ts"],"sourcesContent":["import NodePath from \"./path\";\nimport { VISITOR_KEYS } from \"@babel/types\";\nimport type Scope from \"./scope\";\nimport type { TraverseOptions } from \".\";\nimport type * as t from \"@babel/types\";\nimport type { Visitor } from \"./types\";\n\nexport default class TraversalContext<S = unknown> {\n constructor(\n scope: Scope,\n opts: TraverseOptions,\n state: S,\n parentPath: NodePath,\n ) {\n this.parentPath = parentPath;\n this.scope = scope;\n this.state = state;\n this.opts = opts;\n }\n\n declare parentPath: NodePath;\n declare scope: Scope;\n declare state: S;\n declare opts: TraverseOptions;\n queue: Array<NodePath> | null = null;\n priorityQueue: Array<NodePath> | null = null;\n\n /**\n * This method does a simple check to determine whether or not we really need to attempt\n * visit a node. This will prevent us from constructing a NodePath.\n */\n\n shouldVisit(node: t.Node): boolean {\n const opts = this.opts as Visitor;\n if (opts.enter || opts.exit) return true;\n\n // check if we have a visitor for this node\n if (opts[node.type]) return true;\n\n // check if we're going to traverse into this node\n const keys: Array<string> | undefined = VISITOR_KEYS[node.type];\n if (!keys?.length) return false;\n\n // we need to traverse into this node so ensure that it has children to traverse into!\n for (const key of keys) {\n if (\n // @ts-expect-error key is from visitor keys\n node[key]\n ) {\n return true;\n }\n }\n\n return false;\n }\n\n create(\n node: t.Node,\n container: t.Node | t.Node[],\n key: string | number,\n listKey?: string,\n ): NodePath {\n // We don't need to `.setContext()` here, since `.visitQueue()` already\n // calls `.pushContext`.\n return NodePath.get({\n parentPath: this.parentPath,\n parent: node,\n container,\n key: key,\n listKey,\n });\n }\n\n maybeQueue(path: NodePath, notPriority?: boolean) {\n if (this.queue) {\n if (notPriority) {\n this.queue.push(path);\n } else {\n this.priorityQueue.push(path);\n }\n }\n }\n\n visitMultiple(container: t.Node[], parent: t.Node, listKey: string) {\n // nothing to traverse!\n if (container.length === 0) return false;\n\n const queue = [];\n\n // build up initial queue\n for (let key = 0; key < container.length; key++) {\n const node = container[key];\n if (node && this.shouldVisit(node)) {\n queue.push(this.create(parent, container, key, listKey));\n }\n }\n\n return this.visitQueue(queue);\n }\n\n visitSingle(node: t.Node, key: string): boolean {\n if (\n this.shouldVisit(\n // @ts-expect-error key may not index node\n node[key],\n )\n ) {\n return this.visitQueue([this.create(node, node, key)]);\n } else {\n return false;\n }\n }\n\n visitQueue(queue: Array<NodePath>): boolean {\n // set queue\n this.queue = queue;\n this.priorityQueue = [];\n\n const visited = new WeakSet();\n let stop = false;\n\n // visit the queue\n for (const path of queue) {\n path.resync();\n\n if (\n path.contexts.length === 0 ||\n path.contexts[path.contexts.length - 1] !== this\n ) {\n // The context might already have been pushed when this path was inserted and queued.\n // If we always re-pushed here, we could get duplicates and risk leaving contexts\n // on the stack after the traversal has completed, wh
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