Version 1.1.0-dev.5.1

dart/sdk/lib/_internal/compiler/implementation/js_emitter/reflection_data_parser.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of dart2js.js_emitter;
 
 // TODO(ahe): Share these with js_helper.dart.
 const FUNCTION_INDEX = 0;
 const NAME_INDEX = 1;
 const CALL_NAME_INDEX = 2;
 const REQUIRED_PARAMETER_INDEX = 3;
 const OPTIONAL_PARAMETER_INDEX = 4;
 const DEFAULT_ARGUMENTS_INDEX = 5;
 
 // TODO(ahe): This code should be integrated in CodeEmitterTask.finishClasses.
 String getReflectionDataParser(String classesCollector,
                                JavaScriptBackend backend) {
   Namer namer = backend.namer;
   Compiler compiler = backend.compiler;
   Element closureFromTearOff = compiler.findHelper('closureFromTearOff');
-  String tearOffAccess =
-      // Default value for mocked-up test libraries.
-      'function () { throw "Helper \'closureFromTearOff\' missing." }';
+  String tearOffAccess;
+  String tearOffGlobalObjectName;
+  String tearOffGlobalObject;
   if (closureFromTearOff != null) {
     tearOffAccess = namer.isolateAccess(closureFromTearOff);
+    tearOffGlobalObjectName = tearOffGlobalObject =
+        namer.globalObjectFor(closureFromTearOff);
+  } else {
+    // Default values for mocked-up test libraries.
+    tearOffAccess =
+        'function() { throw "Helper \'closureFromTearOff\' missing." }';
+    tearOffGlobalObjectName = 'MissingHelperFunction';
+    tearOffGlobalObject = '($tearOffAccess())';
   }
+
   String metadataField = '"${namer.metadataField}"';
   String reflectableField = namer.reflectableField;
 
   // TODO(ahe): Move this string constants to namer.
   String reflectionInfoField = r'$reflectionInfo';
   String reflectionNameField = r'$reflectionName';
   String metadataIndexField = r'$metadataIndex';
 
   String defaultValuesField = namer.defaultValuesField;
   String methodsWithOptionalArgumentsField =
@@ skipping 39 matching lines @@
     var getterStubName = ${readString("array", "++index")};
     array = array.slice(++index);
     var requiredParameterInfo = ${readInt("array", "0")};
     var requiredParameterCount = requiredParameterInfo >> 1;
     var isAccessor = (requiredParameterInfo & 1) === 1;
     var isSetter = requiredParameterInfo === 3;
     var isGetter = requiredParameterInfo === 1;
     var optionalParameterInfo = ${readInt("array", "1")};
     var optionalParameterCount = optionalParameterInfo >> 1;
     var optionalParametersAreNamed = (optionalParameterInfo & 1) === 1;
+    var isIntercepted =''' // Break long line.
+       ''' requiredParameterCount + optionalParameterCount != funcs[0].length;
     var functionTypeIndex = ${readFunctionType("array", "2")};
     var isReflectable =''' // Break long line.
     ''' array.length > requiredParameterCount + optionalParameterCount + 3;
     if (getterStubName) {
-      f = tearOff(funcs, array, isStatic, name);
+      f = tearOff(funcs, array, isStatic, name, isIntercepted);
 '''
       /* Used to create an isolate using spawnFunction.*/
 '''
       if (isStatic) init.globalFunctions[name] = f;
       originalDescriptor[getterStubName] = descriptor[getterStubName] = f;
       funcs.push(f);
       if (getterStubName) functions.push(getterStubName);
       f.\$stubName = getterStubName;
       f.\$callName = null;
     }
@@ skipping 21 matching lines @@
         init.mangledNames[name] = reflectionName;
       }
       funcs[0].$reflectionNameField = reflectionName;
       funcs[0].$metadataIndexField = unmangledNameIndex + 1;
       if (optionalParameterCount) descriptor[unmangledName + "*"] = funcs[0];
     }
   }
 ''';
 
   String tearOff = '''
-  function tearOff(funcs, reflectionInfo, isStatic, name) {
-    return function() {
-      return $tearOffAccess(''' // Break long line.
-       '''this, funcs, reflectionInfo, isStatic, arguments, name);
-    }
+  function tearOffGetterNoCsp(funcs, reflectionInfo, name, isIntercepted) {
+    return isIntercepted
+        ? new Function("funcs", "reflectionInfo", "name",''' // Break long line.
+                   ''' "$tearOffGlobalObjectName", "c",
+            "return function tearOff_" + name + (functionCounter++)+ "(x) {" +
+              "if (c === null) c = $tearOffAccess(" +
+                  "this, funcs, reflectionInfo, false, [x], name);" +
+              "return new c(this, funcs[0], x, name);" +
+            "}")(funcs, reflectionInfo, name, $tearOffGlobalObject, null)
+        : new Function("funcs", "reflectionInfo", "name",''' // Break long line.
+                   ''' "$tearOffGlobalObjectName", "c",
+            "return function tearOff_" + name + (functionCounter++)+ "() {" +
+              "if (c === null) c = $tearOffAccess(" +
+                  "this, funcs, reflectionInfo, false, [], name);" +
+              "return new c(this, funcs[0], null, name);" +
+            "}")(funcs, reflectionInfo, name, $tearOffGlobalObject, null)
+  }
+  function tearOffGetterCsp(funcs, reflectionInfo, name, isIntercepted) {
+    var cache = null;
+    return isIntercepted
+        ? function(x) {
+            if (cache === null) cache = $tearOffAccess(''' // Break long line.
+             '''this, funcs, reflectionInfo, false, [x], name);
+            return new cache(this, funcs[0], x, name)
+          }
+        : function() {
+            if (cache === null) cache = $tearOffAccess(''' // Break long line.
+             '''this, funcs, reflectionInfo, false, [], name);
+            return new cache(this, funcs[0], null, name)
+          }
+  }
+  function tearOff(funcs, reflectionInfo, isStatic, name, isIntercepted) {
+    var cache;
+    return isStatic
+        ? function() {
+            if (cache === void 0) cache = $tearOffAccess(''' // Break long line.
+             '''this, funcs, reflectionInfo, true, [], name).prototype;
+            return cache;
+          }
+        : tearOffGetter(funcs, reflectionInfo, name, isIntercepted);
   }
 ''';
 
+
+
+
   String init = '''
+  var functionCounter = 0;
+  var tearOffGetter = (typeof dart_precompiled == "function")
+      ? tearOffGetterCsp : tearOffGetterNoCsp;
   if (!init.libraries) init.libraries = [];
   if (!init.mangledNames) init.mangledNames = map();
   if (!init.mangledGlobalNames) init.mangledGlobalNames = map();
   if (!init.statics) init.statics = map();
   if (!init.typeInformation) init.typeInformation = map();
   if (!init.globalFunctions) init.globalFunctions = map();
   var libraries = init.libraries;
   var mangledNames = init.mangledNames;
   var mangledGlobalNames = init.mangledGlobalNames;
   var hasOwnProperty = Object.prototype.hasOwnProperty;
@@ skipping 137 matching lines @@
 (function() {
   var result = $array[$index];
   if ($check) {
     throw new Error(
         name + ": expected value of type \'$type\' at index " + ($index) +
         " but got " + (typeof result));
   }
   return result;
 })()''';
 }