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// Copyright 2013 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 GIN_PER_CONTEXT_DATA_H_
#define GIN_PER_CONTEXT_DATA_H_
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/scoped_vector.h"
#include "gin/gin_export.h"
#include "v8/include/v8.h"
namespace gin {
class Runner;
// Embedders can store additional per-context data by subclassing
// ContextSupplement.
class GIN_EXPORT ContextSupplement {
public:
ContextSupplement();
virtual ~ContextSupplement();
// Detach will be called before ContextHolder disposes the v8::Context.
// Embedders should not interact with |context| after Detach has been called.
virtual void Detach(v8::Handle<v8::Context> context) = 0;
private:
DISALLOW_COPY_AND_ASSIGN(ContextSupplement);
};
// There is one instance of PerContextData per v8::Context managed by Gin. This
// class stores all the Gin-related data that varies per context.
class GIN_EXPORT PerContextData {
public:
explicit PerContextData(v8::Handle<v8::Context> context);
~PerContextData();
// Can return NULL after the ContextHolder has detached from context.
static PerContextData* From(v8::Handle<v8::Context>);
void Detach(v8::Handle<v8::Context> context);
// The Runner associated with this context. To execute script in this context,
// please use the appropriate API on Runner.
Runner* runner() const { return runner_; }
void set_runner(Runner* runner) { runner_ = runner; }
void AddSupplement(scoped_ptr<ContextSupplement> supplement);
private:
typedef ScopedVector<ContextSupplement> SuplementVector;
Runner* runner_;
SuplementVector supplements_;
DISALLOW_COPY_AND_ASSIGN(PerContextData);
};
} // namespace gin
#endif // GIN_PER_CONTEXT_DATA_H_
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