extensions/renderer/safe_builtins.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef EXTENSIONS_RENDERER_SAFE_BUILTINS_H_
   6 #define EXTENSIONS_RENDERER_SAFE_BUILTINS_H_
   7
   8 #include "base/macros.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "v8/include/v8.h"
  11
  12 namespace extensions {
  13 class ScriptContext;
  14
  15 // Saves a subset of the JavaScript builtin types, so that they can be used
  16 // later without extensions tampering with them.
  17 class SafeBuiltins {
  18  public:
  19   ~SafeBuiltins();
  20
  21   // Creates and immediately installs a SafeBuiltins instance in |context|.
  22   static scoped_ptr<SafeBuiltins> Install(ScriptContext* context);
  23
  24   // Each method returns an object with methods taken from their respective
  25   // builtin object's prototype, adapted to automatically call() themselves.
  26   //
  27   // Examples:
  28   //   Array.prototype.forEach.call(...) becomes Array.forEach(...)
  29   //   Object.prototype.toString.call(...) becomes Object.toString(...)
  30   //   Object.keys.call(...) becomes Object.keys(...)
  31   v8::Local<v8::Object> GetArray() const;
  32   v8::Local<v8::Object> GetFunction() const;
  33   v8::Local<v8::Object> GetJSON() const;
  34   // NOTE(kalman): VS2010 won't compile "GetObject", it mysteriously renames it
  35   // to "GetObjectW" - hence GetObjekt. Sorry.
  36   v8::Local<v8::Object> GetObjekt() const;
  37   v8::Local<v8::Object> GetRegExp() const;
  38   v8::Local<v8::Object> GetString() const;
  39   v8::Local<v8::Object> GetError() const;
  40
  41  private:
  42   explicit SafeBuiltins(ScriptContext* context);
  43
  44   v8::Local<v8::Object> Load(const char* name) const;
  45
  46   ScriptContext* context_;
  47
  48   DISALLOW_COPY_AND_ASSIGN(SafeBuiltins);
  49 };
  50
  51 }  //  namespace extensions
  52
  53 #endif  // EXTENSIONS_RENDERER_SAFE_BUILTINS_H_