install-nix-action/node_modules/@babel/traverse/lib/path/lib/hoister.js
Domen Kožar 49df04613e
v7
2020-02-24 13:29:22 +01:00

190 lines
No EOL
5.6 KiB
JavaScript

"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
function t() {
const data = _interopRequireWildcard(require("@babel/types"));
t = function () {
return data;
};
return data;
}
function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function () { return cache; }; return cache; }
function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; if (obj != null) { var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
const referenceVisitor = {
ReferencedIdentifier(path, state) {
if (path.isJSXIdentifier() && t().react.isCompatTag(path.node.name) && !path.parentPath.isJSXMemberExpression()) {
return;
}
if (path.node.name === "this") {
let scope = path.scope;
do {
if (scope.path.isFunction() && !scope.path.isArrowFunctionExpression()) {
break;
}
} while (scope = scope.parent);
if (scope) state.breakOnScopePaths.push(scope.path);
}
const binding = path.scope.getBinding(path.node.name);
if (!binding) return;
if (binding !== state.scope.getBinding(path.node.name)) return;
state.bindings[path.node.name] = binding;
}
};
class PathHoister {
constructor(path, scope) {
this.breakOnScopePaths = [];
this.bindings = {};
this.scopes = [];
this.scope = scope;
this.path = path;
this.attachAfter = false;
}
isCompatibleScope(scope) {
for (const key of Object.keys(this.bindings)) {
const binding = this.bindings[key];
if (!scope.bindingIdentifierEquals(key, binding.identifier)) {
return false;
}
}
return true;
}
getCompatibleScopes() {
let scope = this.path.scope;
do {
if (this.isCompatibleScope(scope)) {
this.scopes.push(scope);
} else {
break;
}
if (this.breakOnScopePaths.indexOf(scope.path) >= 0) {
break;
}
} while (scope = scope.parent);
}
getAttachmentPath() {
let path = this._getAttachmentPath();
if (!path) return;
let targetScope = path.scope;
if (targetScope.path === path) {
targetScope = path.scope.parent;
}
if (targetScope.path.isProgram() || targetScope.path.isFunction()) {
for (const name of Object.keys(this.bindings)) {
if (!targetScope.hasOwnBinding(name)) continue;
const binding = this.bindings[name];
if (binding.kind === "param" || binding.path.parentKey === "params") {
continue;
}
const bindingParentPath = this.getAttachmentParentForPath(binding.path);
if (bindingParentPath.key >= path.key) {
this.attachAfter = true;
path = binding.path;
for (const violationPath of binding.constantViolations) {
if (this.getAttachmentParentForPath(violationPath).key > path.key) {
path = violationPath;
}
}
}
}
}
return path;
}
_getAttachmentPath() {
const scopes = this.scopes;
const scope = scopes.pop();
if (!scope) return;
if (scope.path.isFunction()) {
if (this.hasOwnParamBindings(scope)) {
if (this.scope === scope) return;
const bodies = scope.path.get("body").get("body");
for (let i = 0; i < bodies.length; i++) {
if (bodies[i].node._blockHoist) continue;
return bodies[i];
}
} else {
return this.getNextScopeAttachmentParent();
}
} else if (scope.path.isProgram()) {
return this.getNextScopeAttachmentParent();
}
}
getNextScopeAttachmentParent() {
const scope = this.scopes.pop();
if (scope) return this.getAttachmentParentForPath(scope.path);
}
getAttachmentParentForPath(path) {
do {
if (!path.parentPath || Array.isArray(path.container) && path.isStatement()) {
return path;
}
} while (path = path.parentPath);
}
hasOwnParamBindings(scope) {
for (const name of Object.keys(this.bindings)) {
if (!scope.hasOwnBinding(name)) continue;
const binding = this.bindings[name];
if (binding.kind === "param" && binding.constant) return true;
}
return false;
}
run() {
this.path.traverse(referenceVisitor, this);
this.getCompatibleScopes();
const attachTo = this.getAttachmentPath();
if (!attachTo) return;
if (attachTo.getFunctionParent() === this.path.getFunctionParent()) return;
let uid = attachTo.scope.generateUidIdentifier("ref");
const declarator = t().variableDeclarator(uid, this.path.node);
const insertFn = this.attachAfter ? "insertAfter" : "insertBefore";
const [attached] = attachTo[insertFn]([attachTo.isVariableDeclarator() ? declarator : t().variableDeclaration("var", [declarator])]);
const parent = this.path.parentPath;
if (parent.isJSXElement() && this.path.container === parent.node.children) {
uid = t().JSXExpressionContainer(uid);
}
this.path.replaceWith(t().cloneNode(uid));
return attachTo.isVariableDeclarator() ? attached.get("init") : attached.get("declarations.0.init");
}
}
exports.default = PathHoister;