Add a content-security-policy (CSP) flag.

lib/compiler/implementation/js_backend/emitter_no_eval.dart

+// Copyright (c) 2012, 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.
+
+class CodeEmitterNoEvalTask extends CodeEmitterTask {
+  CodeEmitterNoEvalTask(Compiler compiler,
+                        Namer namer,
+                        bool generateSourceMap)
+      : super(compiler, namer, generateSourceMap);
+
+  String get generateGetterSetterFunction {
+    return """
+function() {
+  throw 'Internal Error: no dynamic generation of getters and setters allowed';
+}""";
+  }
+
+  String get defineClassFunction {
+    return """
+function(cls, constructor, prototype) {
+  constructor.prototype = prototype;
+  return constructor;
+}""";
+  }
+
+  String get protoSupportCheck {
+    // We don't modify the prototypes in CSP mode. Therefore we can have an
+    // easier prototype-check.
+    return 'var $supportsProtoName = !!{}.__proto__;\n';
+  }
+
+  String get finishIsolateConstructorFunction {
+    // We replace the old Isolate function with a new one that initializes
+    // all its field with the initial (and often final) value of all globals.
+    //
+    // We also copy over old values like the prototype, and the
+    // isolateProperties themselves.
+    return """
+function(oldIsolate) {
+  var isolateProperties = oldIsolate.${namer.ISOLATE_PROPERTIES};
+  function Isolate() {
+    for (var staticName in isolateProperties) {
+      if (Object.prototype.hasOwnProperty.call(isolateProperties, staticName)) {
+        this[staticName] = isolateProperties[staticName];
+      }
+    }
+    // Use the newly created object as prototype. In Chrome this creates a
+    // hidden class for the object and makes sure it is fast to access.
+    function ForceEfficientMap() {}
+    ForceEfficientMap.prototype = this;
+    new ForceEfficientMap;
+  }
+  Isolate.prototype = oldIsolate.prototype;
+  Isolate.prototype.constructor = Isolate;
+  Isolate.${namer.ISOLATE_PROPERTIES} = isolateProperties;
+  return Isolate;
+}""";
+  }
+
+  void emitBoundClosureClassHeader(String mangledName,
+                                   String superName,
+                                   CodeBuffer buffer) {
+    buffer.add("""
+$classesCollector.$mangledName = {'': function $mangledName(self, target) {
+  this.self = self;
+  this.target = target;
+ },
+ 'super': '$superName',
+""");
+  }
+
+  void emitClassConstructor(ClassElement classElement, CodeBuffer buffer) {
+    // Say we have a class A with fields b, c and d, where c needs a getter and
+    // d needs both a getter and a setter. Then we produce:
+    // - a constructor (directly into the given [buffer]):
+    //   function A(b, c, d) { this.b = b, this.c = c, this.d = d; }
+    // - getters and setters (stored in the [explicitGettersSetters] list):
+    //   get$c : function() { return this.c; }
+    //   get$d : function() { return this.d; }
+    //   set$d : function(x) { this.d = x; }
+    List<String> fields = <String>[];
+    visitClassFields(classElement, (Element member,
+                                    String name,
+                                    bool needsGetter,
+                                    bool needsSetter,
+                                    bool needsCheckedSetter) {
+      fields.add(name);
+    });
+
+    List<String> argumentNames = fields;
+    if (fields.length < ($z - $a)) {
+      argumentNames = new List<String>(fields.length);
+      for (int i = 0; i < fields.length; i++) {
+        argumentNames[i] = new String.fromCharCodes([$a + i]);
+      }
+    }
+    String constructorName = namer.safeName(classElement.name.slowToString());
+    // Generate the constructor.
+    buffer.add("'': function $constructorName(");
+    buffer.add(Strings.join(argumentNames, ", "));
+    buffer.add(") {\n");
+    for (int i = 0; i < fields.length; i++) {
+      buffer.add("  this.${fields[i]} = ${argumentNames[i]};\n");
+    }
+    buffer.add(' }');
+  }
+
+  void emitClassFields(ClassElement classElement, CodeBuffer buffer) {
+    /* Do nothing. */
+  }
+
+  void emitClassGettersSetters(ClassElement classElement, CodeBuffer buffer,
+                               {bool omitLeadingComma: false}) {
+    emitComma() {
+      if (!omitLeadingComma) {
+        buffer.add(",\n ");
+      } else {
+        omitLeadingComma = false;
+      }
+    }
+
+    visitClassFields(classElement, (Element member,
+                                    String name,
+                                    bool needsGetter,
+                                    bool needsSetter,
+                                    bool needsCheckedSetter) {
+      if (needsGetter) {
+        emitComma();
+        generateGetter(member, name, buffer);
+      }
+      if (needsSetter) {
+        emitComma();
+        generateSetter(member, name, buffer);
+      }
+      if (needsCheckedSetter) {
+        assert(!needsSetter);
+        emitComma();
+        generateCheckedSetter(member, name, buffer);
+      }
+    });
+  }
+}