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							128 lines
						
					
					
						
							2.8 KiB
						
					
					
				
			
		
		
	
	
							128 lines
						
					
					
						
							2.8 KiB
						
					
					
				"use strict";
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Object.defineProperty(exports, "__esModule", {
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  value: true
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});
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exports.default = void 0;
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var _path = require("./path");
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var _t = require("@babel/types");
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const {
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  VISITOR_KEYS
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} = _t;
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class TraversalContext {
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  constructor(scope, opts, state, parentPath) {
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    this.queue = null;
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    this.priorityQueue = null;
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    this.parentPath = parentPath;
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    this.scope = scope;
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    this.state = state;
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    this.opts = opts;
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  }
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  shouldVisit(node) {
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    const opts = this.opts;
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    if (opts.enter || opts.exit) return true;
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    if (opts[node.type]) return true;
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    const keys = VISITOR_KEYS[node.type];
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    if (!(keys != null && keys.length)) return false;
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    for (const key of keys) {
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      if (
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      node[key]) {
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        return true;
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      }
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    }
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    return false;
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  }
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  create(node, container, key, listKey) {
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    return _path.default.get({
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      parentPath: this.parentPath,
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      parent: node,
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      container,
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      key: key,
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      listKey
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    });
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  }
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  maybeQueue(path, notPriority) {
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    if (this.queue) {
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      if (notPriority) {
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        this.queue.push(path);
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      } else {
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        this.priorityQueue.push(path);
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      }
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    }
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  }
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  visitMultiple(container, parent, listKey) {
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    if (container.length === 0) return false;
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    const queue = [];
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    for (let key = 0; key < container.length; key++) {
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      const node = container[key];
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      if (node && this.shouldVisit(node)) {
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        queue.push(this.create(parent, container, key, listKey));
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      }
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    }
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    return this.visitQueue(queue);
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  }
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  visitSingle(node, key) {
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    if (this.shouldVisit(
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    node[key])) {
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      return this.visitQueue([this.create(node, node, key)]);
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    } else {
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      return false;
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    }
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  }
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  visitQueue(queue) {
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    this.queue = queue;
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    this.priorityQueue = [];
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    const visited = new WeakSet();
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    let stop = false;
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    for (const path of queue) {
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      path.resync();
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      if (path.contexts.length === 0 || path.contexts[path.contexts.length - 1] !== this) {
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        path.pushContext(this);
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      }
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      if (path.key === null) continue;
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      const {
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        node
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      } = path;
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      if (visited.has(node)) continue;
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      if (node) visited.add(node);
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      if (path.visit()) {
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        stop = true;
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        break;
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      }
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      if (this.priorityQueue.length) {
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        stop = this.visitQueue(this.priorityQueue);
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        this.priorityQueue = [];
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        this.queue = queue;
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        if (stop) break;
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      }
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    }
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    for (const path of queue) {
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      path.popContext();
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    }
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    this.queue = null;
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    return stop;
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  }
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  visit(node, key) {
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    const nodes = node[key];
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    if (!nodes) return false;
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    if (Array.isArray(nodes)) {
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      return this.visitMultiple(nodes, node, key);
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    } else {
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      return this.visitSingle(node, key);
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    }
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  }
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}
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exports.default = TraversalContext;
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//# sourceMappingURL=context.js.map
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