add react component optimisation base #653

lib/6to5/transformation/helpers/react.js

@@ -0,0 +1,31 @@
+var t = require("../../types");
+
+exports.isCreateClassCallExpression = function (node) {
+  if (!node || !t.isCallExpression(node)) return false;
+
+  var callee = node.callee;
+  if (!t.isMemberExpression(callee)) return false;
+
+  // not React call member object
+  if (!t.isIdentifier(callee.object, { name: "React" })) return false;
+
+  // not createClass call member property
+  if (!t.isIdentifier(callee.property, { name: "createClass" })) return false;
+
+  // no call arguments
+  var args = node.arguments;
+  if (args.length !== 1) return false;
+
+  // first node arg is not an object
+  var first = args[0];
+  if (!t.isObjectExpression(first)) return false;
+
+  return true;
+};
+
+exports.isReactComponentMemberExpression = function (node) {
+  if (!node || !t.isMemberExpression(node)) return false;
+  if (!t.isIdentifier(node.object, { name: "React" })) return false;
+  if (!t.isIdentifier(node.property, { name: "Component" })) return false;
+  return true;
+};

lib/6to5/transformation/transformers/index.js

@@ -12,6 +12,7 @@ module.exports = {
   "playground.objectGetterMemoization":    require("./playground/object-getter-memoization"),
 
   react:                                   require("./other/react"),
+  "optimisation.react":                    require("./optimisation/react"),
 
   _modules:                                require("./internal/modules"),
 

lib/6to5/transformation/transformers/optimisation/react/base.js

@@ -0,0 +1,9 @@
+module.exports = BaseOptimiser;
+
+function BaseOptimiser() {
+
+}
+
+BaseOptimiser.prototype.optimise = function () {
+
+};

lib/6to5/transformation/transformers/optimisation/react/create-class.js

@@ -0,0 +1,10 @@
+module.exports = CreateClassOptimiser;
+
+var BaseOptimiser = require("./base");
+var util          = require("../../../../util");
+
+function CreateClassOptimiser() {
+
+}
+
+util.inherits(CreateClassOptimiser, BaseOptimiser);

lib/6to5/transformation/transformers/optimisation/react/index.js

@@ -0,0 +1,17 @@
+var CreateClassOptimiser = require("./create-class");
+var NativeClassOptimiser = require("./native-class");
+var react                = require("../../../helpers/react");
+
+exports.optional = true;
+
+exports.CallExpression = function (node) {
+  if (react.isCreateClassCallExpression(node)) {
+    new CreateClassOptimiser(node.arguments[0]).optimise();
+  }
+};
+
+exports.CallExpression = function (node) {
+  if (react.isReactComponentMemberExpression(node.superClass)) {
+    new NativeClassOptimiser(node).optimise();
+  }
+};

lib/6to5/transformation/transformers/optimisation/react/native-class.js

@@ -0,0 +1,10 @@
+module.exports = NativeClassOptimiser;
+
+var BaseOptimiser = require("./base");
+var util          = require("../../../../util");
+
+function NativeClassOptimiser() {
+
+}
+
+util.inherits(NativeClassOptimiser, BaseOptimiser);

lib/6to5/transformation/transformers/other/react.js

@@ -6,6 +6,7 @@
 // jsx
 
 var esutils = require("esutils");
+var react   = require("../../helpers/react");
 var t       = require("../../../types");
 
 exports.JSXIdentifier = function (node, parent) {
@@ -197,33 +198,8 @@ var cleanJSXElementLiteralChild = function (child, args) {
 
 // display names
 
-var isCreateClass = function (call) {
-  if (!call || !t.isCallExpression(call)) return false;
-
-  var callee = call.callee;
-  if (!t.isMemberExpression(callee)) return false;
-
-  // not React call member object
-  var obj = callee.object;
-  if (!t.isIdentifier(obj, { name: "React" })) return false;
-
-  // not createClass call member property
-  var prop = callee.property;
-  if (!t.isIdentifier(prop, { name: "createClass" })) return false;
-
-  // no call arguments
-  var args = call.arguments;
-  if (args.length !== 1) return false;
-
-  // first call arg is not an object
-  var first = args[0];
-  if (!t.isObjectExpression(first)) return;
-
-  return true;
-};
-
 var addDisplayName = function (id, call) {
-  if (!isCreateClass(call)) return;
+  if (!react.isCreateClassCallExpression(call)) return;
 
   var props = call.arguments[0].properties;
   var safe = true;