1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
"use strict";
var _classCallCheck = require("babel-runtime/helpers/class-call-check")["default"];
var _getIterator = require("babel-runtime/core-js/get-iterator")["default"];
var _interopRequireDefault = require("babel-runtime/helpers/interop-require-default")["default"];
var _interopRequireWildcard = require("babel-runtime/helpers/interop-require-wildcard")["default"];
exports.__esModule = true;
var _path = require("./path");
var _path2 = _interopRequireDefault(_path);
var _babelTypes = require("babel-types");
var t = _interopRequireWildcard(_babelTypes);
var testing = process.env.NODE_ENV === "test";
var TraversalContext = (function () {
function TraversalContext(scope, opts, state, parentPath) {
_classCallCheck(this, TraversalContext);
this.parentPath = parentPath;
this.scope = scope;
this.state = state;
this.opts = opts;
}
/**
* This method does a simple check to determine whether or not we really need to attempt
* visit a node. This will prevent us from constructing a NodePath.
*/
TraversalContext.prototype.shouldVisit = function shouldVisit(node) /*: boolean*/ {
var opts = this.opts;
if (opts.enter || opts.exit) return true;
// check if we have a visitor for this node
if (opts[node.type]) return true;
// check if we're going to traverse into this node
var keys /*: ?Array<string>*/ = t.VISITOR_KEYS[node.type];
if (!keys || !keys.length) return false;
// we need to traverse into this node so ensure that it has children to traverse into!
for (var _iterator = keys, _isArray = Array.isArray(_iterator), _i = 0, _iterator = _isArray ? _iterator : _getIterator(_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) /*: NodePath*/ {
return _path2["default"].get({
parentPath: this.parentPath,
parent: node,
container: obj,
key: key,
listKey: listKey
});
};
TraversalContext.prototype.maybeQueue = function maybeQueue(path, notPriority /*:: ?: boolean*/) {
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) {
// nothing to traverse!
if (container.length === 0) return false;
var queue = [];
// build up initial 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) /*: boolean*/ {
if (this.shouldVisit(node[key])) {
return this.visitQueue([this.create(node, node, key)]);
} else {
return false;
}
};
TraversalContext.prototype.visitQueue = function visitQueue(queue /*: Array<NodePath>*/) {
// set queue
this.queue = queue;
this.priorityQueue = [];
var visited = [];
var stop = false;
// visit the queue
for (var _iterator2 = queue, _isArray2 = Array.isArray(_iterator2), _i2 = 0, _iterator2 = _isArray2 ? _iterator2 : _getIterator(_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();
path.pushContext(this);
if (testing && queue.length >= 1000) {
this.trap = true;
}
// ensure we don't visit the same node twice
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;
}
}
// clear queue
for (var _iterator3 = queue, _isArray3 = Array.isArray(_iterator3), _i3 = 0, _iterator3 = _isArray3 ? _iterator3 : _getIterator(_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();
}
// clear queue
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"];