Moved files under Source/bindings/v8 to Source/bindings/core/v8.

Source/bindings/v8/ScriptState.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef ScriptState_h
-#define ScriptState_h
-
-#include "bindings/v8/ScopedPersistent.h"
-#include "bindings/v8/V8PerContextData.h"
-#include "wtf/RefCounted.h"
-#include <v8.h>
-
-namespace WebCore {
-
-class LocalDOMWindow;
-class DOMWrapperWorld;
-class ExecutionContext;
-class LocalFrame;
-class ScriptValue;
-
-// ScriptState is created when v8::Context is created.
-// ScriptState is destroyed when v8::Context is garbage-collected and
-// all V8 proxy objects that have references to the ScriptState are destructed.
-class ScriptState : public RefCounted<ScriptState> {
-    WTF_MAKE_NONCOPYABLE(ScriptState);
-public:
-    class Scope {
-    public:
-        // You need to make sure that scriptState->context() is not empty before creating a Scope.
-        explicit Scope(ScriptState* scriptState)
-            : m_handleScope(scriptState->isolate())
-            , m_context(scriptState->context())
-        {
-            ASSERT(!m_context.IsEmpty());
-            m_context->Enter();
-        }
-
-        ~Scope()
-        {
-            m_context->Exit();
-        }
-
-    private:
-        v8::HandleScope m_handleScope;
-        v8::Handle<v8::Context> m_context;
-    };
-
-    static PassRefPtr<ScriptState> create(v8::Handle<v8::Context>, PassRefPtr<DOMWrapperWorld>);
-    virtual ~ScriptState();
-
-    static ScriptState* current(v8::Isolate* isolate)
-    {
-        return from(isolate->GetCurrentContext());
-    }
-
-    static ScriptState* from(v8::Handle<v8::Context> context)
-    {
-        ASSERT(!context.IsEmpty());
-        ScriptState* scriptState = static_cast<ScriptState*>(context->GetAlignedPointerFromEmbedderData(v8ContextPerContextDataIndex));
-        // ScriptState::from() must not be called for a context that does not have
-        // valid embedder data in the embedder field.
-        RELEASE_ASSERT_WITH_SECURITY_IMPLICATION(scriptState);
-        RELEASE_ASSERT_WITH_SECURITY_IMPLICATION(scriptState->context() == context);
-        return scriptState;
-    }
-
-    static ScriptState* forMainWorld(LocalFrame*);
-
-    v8::Isolate* isolate() const { return m_isolate; }
-    DOMWrapperWorld& world() const { return *m_world; }
-    LocalDOMWindow* domWindow() const;
-    virtual ExecutionContext* executionContext() const;
-    virtual void setExecutionContext(ExecutionContext*);
-
-    // This can return an empty handle if the v8::Context is gone.
-    v8::Handle<v8::Context> context() const { return m_context.newLocal(m_isolate); }
-    bool contextIsEmpty() const { return m_context.isEmpty(); }
-    void clearContext() { return m_context.clear(); }
-
-    V8PerContextData* perContextData() const { return m_perContextData.get(); }
-    void disposePerContextData() { m_perContextData = nullptr; }
-
-    bool evalEnabled() const;
-    void setEvalEnabled(bool);
-    ScriptValue getFromGlobalObject(const char* name);
-
-protected:
-    ScriptState(v8::Handle<v8::Context>, PassRefPtr<DOMWrapperWorld>);
-
-private:
-    v8::Isolate* m_isolate;
-    // This persistent handle is weak.
-    ScopedPersistent<v8::Context> m_context;
-
-    // This RefPtr doesn't cause a cycle because all persistent handles that DOMWrapperWorld holds are weak.
-    RefPtr<DOMWrapperWorld> m_world;
-
-    // This OwnPtr causes a cycle:
-    // V8PerContextData --(Persistent)--> v8::Context --(RefPtr)--> ScriptState --(OwnPtr)--> V8PerContextData
-    // So you must explicitly clear the OwnPtr by calling disposePerContextData()
-    // once you no longer need V8PerContextData. Otherwise, the v8::Context will leak.
-    OwnPtr<V8PerContextData> m_perContextData;
-};
-
-class ScriptStateForTesting : public ScriptState {
-public:
-    static PassRefPtr<ScriptStateForTesting> create(v8::Handle<v8::Context>, PassRefPtr<DOMWrapperWorld>);
-
-    virtual ExecutionContext* executionContext() const OVERRIDE;
-    virtual void setExecutionContext(ExecutionContext*) OVERRIDE;
-
-private:
-    ScriptStateForTesting(v8::Handle<v8::Context>, PassRefPtr<DOMWrapperWorld>);
-
-    ExecutionContext* m_executionContext;
-};
-
-// ScriptStateProtectingContext keeps the context associated with the ScriptState alive.
-// You need to call clear() once you no longer need the context. Otherwise, the context will leak.
-class ScriptStateProtectingContext {
-    WTF_MAKE_NONCOPYABLE(ScriptStateProtectingContext);
-public:
-    ScriptStateProtectingContext(ScriptState* scriptState)
-        : m_scriptState(scriptState)
-    {
-        if (m_scriptState)
-            m_context.set(m_scriptState->isolate(), m_scriptState->context());
-    }
-
-    ScriptState* operator->() const { return m_scriptState.get(); }
-    ScriptState* get() const { return m_scriptState.get(); }
-    void clear()
-    {
-        m_scriptState = nullptr;
-        m_context.clear();
-    }
-
-private:
-    RefPtr<ScriptState> m_scriptState;
-    ScopedPersistent<v8::Context> m_context;
-};
-
-}
-
-#endif // ScriptState_h