Move ScriptWrappable and dependencies to platform/bindings

third_party/WebKit/Source/bindings/core/v8/DOMWrapperWorld.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 10 matching lines @@
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef DOMWrapperWorld_h
-#define DOMWrapperWorld_h
-
-#include <memory>
-
-#include "bindings/core/v8/ScriptState.h"
-#include "core/CoreExport.h"
-#include "platform/weborigin/SecurityOrigin.h"
-#include "platform/wtf/PassRefPtr.h"
-#include "platform/wtf/RefCounted.h"
-#include "platform/wtf/RefPtr.h"
-#include "v8/include/v8.h"
-
-namespace blink {
-
-class DOMDataStore;
-class DOMObjectHolderBase;
-
-// This class represent a collection of DOM wrappers for a specific world. This
-// is identified by a world id that is a per-thread global identifier (see
-// WorldId enum).
-class CORE_EXPORT DOMWrapperWorld : public RefCounted<DOMWrapperWorld> {
- public:
-  // Per-thread global identifiers for DOMWrapperWorld.
-  enum WorldId {
-    kInvalidWorldId = -1,
-    kMainWorldId = 0,
-
-    // Embedder isolated worlds can use IDs in [1, 1<<29).
-    kEmbedderWorldIdLimit = (1 << 29),
-    kDocumentXMLTreeViewerWorldId,
-    kIsolatedWorldIdLimit,
-
-    // Other worlds can use IDs after this. Don't manually pick up an ID from
-    // this range. generateWorldIdForType() picks it up on behalf of you.
-    kUnspecifiedWorldIdStart,
-  };
-
-  enum class WorldType {
-    kMain,
-    kIsolated,
-    kGarbageCollector,
-    kRegExp,
-    kTesting,
-    kWorker,
-  };
-
-  // Creates a world other than IsolatedWorld.
-  static PassRefPtr<DOMWrapperWorld> Create(v8::Isolate*, WorldType);
-
-  // Ensures an IsolatedWorld for |worldId|.
-  static PassRefPtr<DOMWrapperWorld> EnsureIsolatedWorld(v8::Isolate*,
-                                                         int world_id);
-  ~DOMWrapperWorld();
-  void Dispose();
-
-  // Called from performance-sensitive functions, so we should keep this simple
-  // and fast as much as possible.
-  static bool NonMainWorldsExistInMainThread() {
-    return number_of_non_main_worlds_in_main_thread_;
-  }
-
-  static void AllWorldsInCurrentThread(Vector<RefPtr<DOMWrapperWorld>>& worlds);
-  static void MarkWrappersInAllWorlds(ScriptWrappable*,
-                                      const ScriptWrappableVisitor*);
-
-  static DOMWrapperWorld& World(v8::Local<v8::Context> context) {
-    return ScriptState::From(context)->World();
-  }
-
-  static DOMWrapperWorld& Current(v8::Isolate* isolate) {
-    return World(isolate->GetCurrentContext());
-  }
-
-  static DOMWrapperWorld& MainWorld();
-
-  static void SetIsolatedWorldHumanReadableName(int world_id, const String&);
-  String IsolatedWorldHumanReadableName();
-
-  // Associates an isolated world (see above for description) with a security
-  // origin. XMLHttpRequest instances used in that world will be considered
-  // to come from that origin, not the frame's.
-  static void SetIsolatedWorldSecurityOrigin(int world_id,
-                                             PassRefPtr<SecurityOrigin>);
-  SecurityOrigin* IsolatedWorldSecurityOrigin();
-
-  // Associated an isolated world with a Content Security Policy. Resources
-  // embedded into the main world's DOM from script executed in an isolated
-  // world should be restricted based on the isolated world's DOM, not the
-  // main world's.
-  //
-  // FIXME: Right now, resource injection simply bypasses the main world's
-  // DOM. More work is necessary to allow the isolated world's policy to be
-  // applied correctly.
-  static void SetIsolatedWorldContentSecurityPolicy(int world_id,
-                                                    const String& policy);
-  bool IsolatedWorldHasContentSecurityPolicy();
-
-  bool IsMainWorld() const { return world_type_ == WorldType::kMain; }
-  bool IsWorkerWorld() const { return world_type_ == WorldType::kWorker; }
-  bool IsIsolatedWorld() const { return world_type_ == WorldType::kIsolated; }
-
-  int GetWorldId() const { return world_id_; }
-  DOMDataStore& DomDataStore() const { return *dom_data_store_; }
-
-  template <typename T>
-  void RegisterDOMObjectHolder(v8::Isolate* isolate,
-                               T* object,
-                               v8::Local<v8::Value> wrapper) {
-    RegisterDOMObjectHolderInternal(
-        DOMObjectHolder<T>::Create(isolate, object, wrapper));
-  }
-
- private:
-  class DOMObjectHolderBase {
-    USING_FAST_MALLOC(DOMObjectHolderBase);
-
-   public:
-    DOMObjectHolderBase(v8::Isolate* isolate, v8::Local<v8::Value> wrapper)
-        : wrapper_(isolate, wrapper), world_(nullptr) {}
-    virtual ~DOMObjectHolderBase() {}
-
-    DOMWrapperWorld* World() const { return world_; }
-    void SetWorld(DOMWrapperWorld* world) { world_ = world; }
-    void SetWeak(v8::WeakCallbackInfo<DOMObjectHolderBase>::Callback callback) {
-      wrapper_.SetWeak(this, callback);
-    }
-
-   private:
-    ScopedPersistent<v8::Value> wrapper_;
-    DOMWrapperWorld* world_;
-  };
-
-  template <typename T>
-  class DOMObjectHolder : public DOMObjectHolderBase {
-   public:
-    static std::unique_ptr<DOMObjectHolder<T>>
-    Create(v8::Isolate* isolate, T* object, v8::Local<v8::Value> wrapper) {
-      return WTF::WrapUnique(new DOMObjectHolder(isolate, object, wrapper));
-    }
-
-   private:
-    DOMObjectHolder(v8::Isolate* isolate,
-                    T* object,
-                    v8::Local<v8::Value> wrapper)
-        : DOMObjectHolderBase(isolate, wrapper), object_(object) {}
-
-    Persistent<T> object_;
-  };
-
-  DOMWrapperWorld(v8::Isolate*, WorldType, int world_id);
-
-  static void WeakCallbackForDOMObjectHolder(
-      const v8::WeakCallbackInfo<DOMObjectHolderBase>&);
-  void RegisterDOMObjectHolderInternal(std::unique_ptr<DOMObjectHolderBase>);
-  void UnregisterDOMObjectHolder(DOMObjectHolderBase*);
-
-  static unsigned number_of_non_main_worlds_in_main_thread_;
-
-  // Returns an identifier for a given world type. This must not be called for
-  // WorldType::IsolatedWorld because an identifier for the world is given from
-  // out of DOMWrapperWorld.
-  static int GenerateWorldIdForType(WorldType);
-
-  // Dissociates all wrappers in all worlds associated with |script_wrappable|.
-  //
-  // Do not use this function except for DOMWindow.  Only DOMWindow needs to
-  // dissociate wrappers from the ScriptWrappable because of the following two
-  // reasons.
-  //
-  // Reason 1) Case of the main world
-  // A DOMWindow may be collected by Blink GC *before* V8 GC collects the
-  // wrapper because the wrapper object associated with a DOMWindow is a global
-  // proxy, which remains after navigations.  We don't want V8 GC to reset the
-  // weak persistent handle to a wrapper within the DOMWindow
-  // (ScriptWrappable::main_world_wrapper_) *after* Blink GC collects the
-  // DOMWindow because it's use-after-free.  Thus, we need to dissociate the
-  // wrapper in advance.
-  //
-  // Reason 2) Case of isolated worlds
-  // As same, a DOMWindow may be collected before the wrapper gets collected.
-  // A DOMWrapperMap supports mapping from ScriptWrappable* to v8::Global<T>,
-  // and we don't want to leave an entry of an already-dead DOMWindow* to the
-  // persistent handle for the global proxy object, especially considering that
-  // the address to the already-dead DOMWindow* may be re-used.
-  friend class DOMWindow;
-  static void DissociateDOMWindowWrappersInAllWorlds(ScriptWrappable*);
-
-  const WorldType world_type_;
-  const int world_id_;
-  std::unique_ptr<DOMDataStore> dom_data_store_;
-  HashSet<std::unique_ptr<DOMObjectHolderBase>> dom_object_holders_;
-};
-
-}  // namespace blink
-
-#endif  // DOMWrapperWorld_h
+// This file has been moved to platform/bindings/DOMWrapperWorld.h.
+// TODO(adithyas): Remove this file.
+#include "platform/bindings/DOMWrapperWorld.h"