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