168 lines
		
	
	
		
			5.9 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
			
		
		
	
	
			168 lines
		
	
	
		
			5.9 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
"use strict";
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Object.defineProperty(exports, "__esModule", {
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  value: true
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});
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exports.default = void 0;
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var _helperPluginUtils = require("@babel/helper-plugin-utils");
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var _helperSkipTransparentExpressionWrappers = require("@babel/helper-skip-transparent-expression-wrappers");
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var _core = require("@babel/core");
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var _default = exports.default = (0, _helperPluginUtils.declare)((api, options) => {
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  var _api$assumption, _options$allowArrayLi;
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  api.assertVersion(7);
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  const iterableIsArray = (_api$assumption = api.assumption("iterableIsArray")) != null ? _api$assumption : options.loose;
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  const arrayLikeIsIterable = (_options$allowArrayLi = options.allowArrayLike) != null ? _options$allowArrayLi : api.assumption("arrayLikeIsIterable");
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  function getSpreadLiteral(spread, scope) {
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    if (iterableIsArray && !_core.types.isIdentifier(spread.argument, {
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      name: "arguments"
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    })) {
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      return spread.argument;
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    } else {
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      const node = spread.argument;
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      if (_core.types.isIdentifier(node)) {
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        const binding = scope.getBinding(node.name);
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        if (binding != null && binding.constant && binding.path.isGenericType("Array")) {
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          return node;
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        }
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      }
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      if (_core.types.isArrayExpression(node)) {
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        return node;
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      }
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      if (_core.types.isIdentifier(node, {
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        name: "arguments"
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      })) {
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        return _core.template.expression.ast`
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          Array.prototype.slice.call(${node})
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        `;
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      }
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      const args = [node];
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      let helperName = "toConsumableArray";
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      if (arrayLikeIsIterable) {
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        args.unshift(scope.path.hub.addHelper(helperName));
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        helperName = "maybeArrayLike";
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      }
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      return _core.types.callExpression(scope.path.hub.addHelper(helperName), args);
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    }
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  }
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  function hasHole(spread) {
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    return spread.elements.includes(null);
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  }
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  function hasSpread(nodes) {
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    for (let i = 0; i < nodes.length; i++) {
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      if (_core.types.isSpreadElement(nodes[i])) {
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        return true;
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      }
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    }
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    return false;
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  }
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  function push(_props, nodes) {
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    if (!_props.length) return _props;
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    nodes.push(_core.types.arrayExpression(_props));
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    return [];
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  }
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  function build(props, scope, file) {
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    const nodes = [];
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    let _props = [];
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    for (const prop of props) {
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      if (_core.types.isSpreadElement(prop)) {
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        _props = push(_props, nodes);
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        let spreadLiteral = getSpreadLiteral(prop, scope);
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        if (_core.types.isArrayExpression(spreadLiteral) && hasHole(spreadLiteral)) {
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          spreadLiteral = _core.types.callExpression(file.addHelper("arrayWithoutHoles"), [spreadLiteral]);
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        }
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        nodes.push(spreadLiteral);
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      } else {
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        _props.push(prop);
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      }
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    }
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    push(_props, nodes);
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    return nodes;
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  }
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  return {
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    name: "transform-spread",
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    visitor: {
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      ArrayExpression(path) {
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        const {
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          node,
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          scope
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        } = path;
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        const elements = node.elements;
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        if (!hasSpread(elements)) return;
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        const nodes = build(elements, scope, this.file);
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        let first = nodes[0];
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        if (nodes.length === 1 && first !== elements[0].argument) {
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          path.replaceWith(first);
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          return;
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        }
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        if (!_core.types.isArrayExpression(first)) {
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          first = _core.types.arrayExpression([]);
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        } else {
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          nodes.shift();
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        }
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        path.replaceWith(_core.types.callExpression(_core.types.memberExpression(first, _core.types.identifier("concat")), nodes));
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      },
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      CallExpression(path) {
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        const {
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          node,
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          scope
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        } = path;
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        const args = node.arguments;
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        if (!hasSpread(args)) return;
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        const calleePath = (0, _helperSkipTransparentExpressionWrappers.skipTransparentExprWrappers)(path.get("callee"));
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        if (calleePath.isSuper()) {
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          throw path.buildCodeFrameError("It's not possible to compile spread arguments in `super()` without compiling classes.\n" + "Please add '@babel/plugin-transform-classes' to your Babel configuration.");
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        }
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        let contextLiteral = scope.buildUndefinedNode();
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        node.arguments = [];
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        let nodes;
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        if (args.length === 1 && _core.types.isIdentifier(args[0].argument, {
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          name: "arguments"
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        })) {
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          nodes = [args[0].argument];
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        } else {
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          nodes = build(args, scope, this.file);
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        }
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        const first = nodes.shift();
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        if (nodes.length) {
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          node.arguments.push(_core.types.callExpression(_core.types.memberExpression(first, _core.types.identifier("concat")), nodes));
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        } else {
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          node.arguments.push(first);
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        }
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        const callee = calleePath.node;
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        if (_core.types.isMemberExpression(callee)) {
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          const temp = scope.maybeGenerateMemoised(callee.object);
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          if (temp) {
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            callee.object = _core.types.assignmentExpression("=", temp, callee.object);
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            contextLiteral = temp;
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          } else {
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            contextLiteral = _core.types.cloneNode(callee.object);
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          }
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        }
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        node.callee = _core.types.memberExpression(node.callee, _core.types.identifier("apply"));
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        if (_core.types.isSuper(contextLiteral)) {
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          contextLiteral = _core.types.thisExpression();
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        }
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        node.arguments.unshift(_core.types.cloneNode(contextLiteral));
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      },
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      NewExpression(path) {
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        const {
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          node,
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          scope
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        } = path;
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        if (!hasSpread(node.arguments)) return;
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        const nodes = build(node.arguments, scope, this.file);
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        const first = nodes.shift();
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        let args;
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        if (nodes.length) {
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          args = _core.types.callExpression(_core.types.memberExpression(first, _core.types.identifier("concat")), nodes);
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        } else {
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          args = first;
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        }
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        path.replaceWith(_core.types.callExpression(path.hub.addHelper("construct"), [node.callee, args]));
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      }
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    }
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  };
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});
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//# sourceMappingURL=index.js.map
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