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frontend/node_modules/@babel/traverse/lib/path/lib/hoister.js

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+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _t = require("@babel/types");
+var _t2 = _t;
+const {
+  react
+} = _t;
+const {
+  cloneNode,
+  jsxExpressionContainer,
+  variableDeclaration,
+  variableDeclarator
+} = _t2;
+const referenceVisitor = {
+  ReferencedIdentifier(path, state) {
+    if (path.isJSXIdentifier() && 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;
+    for (const violation of binding.constantViolations) {
+      if (violation.scope !== binding.path.scope) {
+        state.mutableBinding = true;
+        path.stop();
+        return;
+      }
+    }
+    if (binding !== state.scope.getBinding(path.node.name)) return;
+    state.bindings[path.node.name] = binding;
+  }
+};
+class PathHoister {
+  constructor(path, scope) {
+    this.breakOnScopePaths = void 0;
+    this.bindings = void 0;
+    this.mutableBinding = void 0;
+    this.scopes = void 0;
+    this.scope = void 0;
+    this.path = void 0;
+    this.attachAfter = void 0;
+    this.breakOnScopePaths = [];
+    this.bindings = {};
+    this.mutableBinding = false;
+    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.includes(scope.path)) {
+        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);
+    return path;
+  }
+  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);
+    if (this.mutableBinding) return;
+    this.getCompatibleScopes();
+    const attachTo = this.getAttachmentPath();
+    if (!attachTo) return;
+    if (attachTo.getFunctionParent() === this.path.getFunctionParent()) return;
+    let uid = attachTo.scope.generateUidIdentifier("ref");
+    const declarator = variableDeclarator(uid, this.path.node);
+    const insertFn = this.attachAfter ? "insertAfter" : "insertBefore";
+    const [attached] = attachTo[insertFn]([attachTo.isVariableDeclarator() ? declarator : variableDeclaration("var", [declarator])]);
+    const parent = this.path.parentPath;
+    if (parent.isJSXElement() && this.path.container === parent.node.children) {
+      uid = jsxExpressionContainer(uid);
+    }
+    this.path.replaceWith(cloneNode(uid));
+    return attached.isVariableDeclarator() ? attached.get("init") : attached.get("declarations.0.init");
+  }
+}
+exports.default = PathHoister;
+
+//# sourceMappingURL=hoister.js.map