You cannot select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

200 lines
5.1 KiB
JavaScript

5 years ago
"use strict";
exports.__esModule = true;
var _getIterator2 = require("babel-runtime/core-js/get-iterator");
var _getIterator3 = _interopRequireDefault(_getIterator2);
var _classCallCheck2 = require("babel-runtime/helpers/classCallCheck");
var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);
var _path2 = require("./path");
var _path3 = _interopRequireDefault(_path2);
var _babelTypes = require("babel-types");
var t = _interopRequireWildcard(_babelTypes);
function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
var testing = process.env.NODE_ENV === "test";
var TraversalContext = function () {
function TraversalContext(scope, opts, state, parentPath) {
(0, _classCallCheck3.default)(this, TraversalContext);
this.queue = null;
this.parentPath = parentPath;
this.scope = scope;
this.state = state;
this.opts = opts;
}
TraversalContext.prototype.shouldVisit = function shouldVisit(node) {
var opts = this.opts;
if (opts.enter || opts.exit) return true;
if (opts[node.type]) return true;
var keys = t.VISITOR_KEYS[node.type];
if (!keys || !keys.length) return false;
for (var _iterator = keys, _isArray = Array.isArray(_iterator), _i = 0, _iterator = _isArray ? _iterator : (0, _getIterator3.default)(_iterator);;) {
var _ref;
if (_isArray) {
if (_i >= _iterator.length) break;
_ref = _iterator[_i++];
} else {
_i = _iterator.next();
if (_i.done) break;
_ref = _i.value;
}
var key = _ref;
if (node[key]) return true;
}
return false;
};
TraversalContext.prototype.create = function create(node, obj, key, listKey) {
return _path3.default.get({
parentPath: this.parentPath,
parent: node,
container: obj,
key: key,
listKey: listKey
});
};
TraversalContext.prototype.maybeQueue = function maybeQueue(path, notPriority) {
if (this.trap) {
throw new Error("Infinite cycle detected");
}
if (this.queue) {
if (notPriority) {
this.queue.push(path);
} else {
this.priorityQueue.push(path);
}
}
};
TraversalContext.prototype.visitMultiple = function visitMultiple(container, parent, listKey) {
if (container.length === 0) return false;
var queue = [];
for (var key = 0; key < container.length; key++) {
var node = container[key];
if (node && this.shouldVisit(node)) {
queue.push(this.create(parent, container, key, listKey));
}
}
return this.visitQueue(queue);
};
TraversalContext.prototype.visitSingle = function visitSingle(node, key) {
if (this.shouldVisit(node[key])) {
return this.visitQueue([this.create(node, node, key)]);
} else {
return false;
}
};
TraversalContext.prototype.visitQueue = function visitQueue(queue) {
this.queue = queue;
this.priorityQueue = [];
var visited = [];
var stop = false;
for (var _iterator2 = queue, _isArray2 = Array.isArray(_iterator2), _i2 = 0, _iterator2 = _isArray2 ? _iterator2 : (0, _getIterator3.default)(_iterator2);;) {
var _ref2;
if (_isArray2) {
if (_i2 >= _iterator2.length) break;
_ref2 = _iterator2[_i2++];
} else {
_i2 = _iterator2.next();
if (_i2.done) break;
_ref2 = _i2.value;
}
var path = _ref2;
path.resync();
if (path.contexts.length === 0 || path.contexts[path.contexts.length - 1] !== this) {
path.pushContext(this);
}
if (path.key === null) continue;
if (testing && queue.length >= 10000) {
this.trap = true;
}
if (visited.indexOf(path.node) >= 0) continue;
visited.push(path.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 (var _iterator3 = queue, _isArray3 = Array.isArray(_iterator3), _i3 = 0, _iterator3 = _isArray3 ? _iterator3 : (0, _getIterator3.default)(_iterator3);;) {
var _ref3;
if (_isArray3) {
if (_i3 >= _iterator3.length) break;
_ref3 = _iterator3[_i3++];
} else {
_i3 = _iterator3.next();
if (_i3.done) break;
_ref3 = _i3.value;
}
var _path = _ref3;
_path.popContext();
}
this.queue = null;
return stop;
};
TraversalContext.prototype.visit = function visit(node, key) {
var nodes = node[key];
if (!nodes) return false;
if (Array.isArray(nodes)) {
return this.visitMultiple(nodes, node, key);
} else {
return this.visitSingle(node, key);
}
};
return TraversalContext;
}();
exports.default = TraversalContext;
module.exports = exports["default"];