Current Dev State

static/js/ketcher2/node_modules/babel-plugin-transform-es2015-parameters/lib/default.js

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+"use strict";
+
+exports.__esModule = true;
+exports.visitor = undefined;
+
+var _getIterator2 = require("babel-runtime/core-js/get-iterator");
+
+var _getIterator3 = _interopRequireDefault(_getIterator2);
+
+var _babelHelperGetFunctionArity = require("babel-helper-get-function-arity");
+
+var _babelHelperGetFunctionArity2 = _interopRequireDefault(_babelHelperGetFunctionArity);
+
+var _babelHelperCallDelegate = require("babel-helper-call-delegate");
+
+var _babelHelperCallDelegate2 = _interopRequireDefault(_babelHelperCallDelegate);
+
+var _babelTemplate = require("babel-template");
+
+var _babelTemplate2 = _interopRequireDefault(_babelTemplate);
+
+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 buildDefaultParam = (0, _babelTemplate2.default)("\n  let VARIABLE_NAME =\n    ARGUMENTS.length > ARGUMENT_KEY && ARGUMENTS[ARGUMENT_KEY] !== undefined ?\n      ARGUMENTS[ARGUMENT_KEY]\n    :\n      DEFAULT_VALUE;\n");
+
+var buildCutOff = (0, _babelTemplate2.default)("\n  let $0 = $1[$2];\n");
+
+function hasDefaults(node) {
+  for (var _iterator = node.params, _isArray = Array.isArray(_iterator), _i = 0, _iterator = _isArray ? _iterator : (0, _getIterator3.default)(_iterator);;) {
+    var _ref;
+
+    if (_isArray) {
+      if (_i >= _iterator.length) break;
+      _ref = _iterator[_i++];
+    } else {
+      _i = _iterator.next();
+      if (_i.done) break;
+      _ref = _i.value;
+    }
+
+    var param = _ref;
+
+    if (!t.isIdentifier(param)) return true;
+  }
+  return false;
+}
+
+function isSafeBinding(scope, node) {
+  if (!scope.hasOwnBinding(node.name)) return true;
+
+  var _scope$getOwnBinding = scope.getOwnBinding(node.name),
+      kind = _scope$getOwnBinding.kind;
+
+  return kind === "param" || kind === "local";
+}
+
+var iifeVisitor = {
+  ReferencedIdentifier: function ReferencedIdentifier(path, state) {
+    var scope = path.scope,
+        node = path.node;
+
+    if (node.name === "eval" || !isSafeBinding(scope, node)) {
+      state.iife = true;
+      path.stop();
+    }
+  },
+  Scope: function Scope(path) {
+    path.skip();
+  }
+};
+
+var visitor = exports.visitor = {
+  Function: function Function(path) {
+    var node = path.node,
+        scope = path.scope;
+
+    if (!hasDefaults(node)) return;
+
+    path.ensureBlock();
+
+    var state = {
+      iife: false,
+      scope: scope
+    };
+
+    var body = [];
+
+    var argsIdentifier = t.identifier("arguments");
+    argsIdentifier._shadowedFunctionLiteral = path;
+
+    function pushDefNode(left, right, i) {
+      var defNode = buildDefaultParam({
+        VARIABLE_NAME: left,
+        DEFAULT_VALUE: right,
+        ARGUMENT_KEY: t.numericLiteral(i),
+        ARGUMENTS: argsIdentifier
+      });
+      defNode._blockHoist = node.params.length - i;
+      body.push(defNode);
+    }
+
+    var lastNonDefaultParam = (0, _babelHelperGetFunctionArity2.default)(node);
+
+    var params = path.get("params");
+    for (var i = 0; i < params.length; i++) {
+      var param = params[i];
+
+      if (!param.isAssignmentPattern()) {
+        if (!state.iife && !param.isIdentifier()) {
+          param.traverse(iifeVisitor, state);
+        }
+
+        continue;
+      }
+
+      var left = param.get("left");
+      var right = param.get("right");
+
+      if (i >= lastNonDefaultParam || left.isPattern()) {
+        var placeholder = scope.generateUidIdentifier("x");
+        placeholder._isDefaultPlaceholder = true;
+        node.params[i] = placeholder;
+      } else {
+        node.params[i] = left.node;
+      }
+
+      if (!state.iife) {
+        if (right.isIdentifier() && !isSafeBinding(scope, right.node)) {
+          state.iife = true;
+        } else {
+          right.traverse(iifeVisitor, state);
+        }
+      }
+
+      pushDefNode(left.node, right.node, i);
+    }
+
+    for (var _i2 = lastNonDefaultParam + 1; _i2 < node.params.length; _i2++) {
+      var _param = node.params[_i2];
+      if (_param._isDefaultPlaceholder) continue;
+
+      var declar = buildCutOff(_param, argsIdentifier, t.numericLiteral(_i2));
+      declar._blockHoist = node.params.length - _i2;
+      body.push(declar);
+    }
+
+    node.params = node.params.slice(0, lastNonDefaultParam);
+
+    if (state.iife) {
+      body.push((0, _babelHelperCallDelegate2.default)(path, scope));
+      path.set("body", t.blockStatement(body));
+    } else {
+      path.get("body").unshiftContainer("body", body);
+    }
+  }
+};