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// Copyright (c) 2011 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 CHROME_RENDERER_EXTENSIONS_CHROME_V8_CONTEXT_SET_H_
#define CHROME_RENDERER_EXTENSIONS_CHROME_V8_CONTEXT_SET_H_
#pragma once
#include <set>
#include <string>
#include "base/basictypes.h"
#include "v8/include/v8.h"
class ChromeV8Context;
class GURL;
class RenderView;
namespace base {
class ListValue;
}
namespace v8 {
class Context;
}
// A container of ExtensionBindingsContext. Since calling JavaScript within a
// context can cause any number of contexts to be created or destroyed, this
// has additional smarts to help with the set changing underneath callers.
//
// TODO(aa): Remove extension-specific bits, rename to BindingsContextSet, and
// move into renderer/bindings with DEPS to protect against dependencies on
// extensions.
class ChromeV8ContextSet {
public:
ChromeV8ContextSet();
~ChromeV8ContextSet();
int size() const;
// Takes ownership of |context|.
void Add(ChromeV8Context* context);
// If the specified context is contained in this set, remove it, then delete
// it asynchronously. After this call returns the context object will still
// be valid, but its frame() pointer will be cleared.
void Remove(ChromeV8Context* context);
// Returns a copy to protect against changes.
typedef std::set<ChromeV8Context*> ContextSet;
ContextSet GetAll() const;
// Gets the ChromeV8Context corresponding to the v8::Context that is
// on the top of the stack, or NULL if no such context exists.
ChromeV8Context* GetCurrent() const;
// Gets the ChromeV8Context corresponding to the specified
// v8::Context or NULL if no such context exists.
ChromeV8Context* GetByV8Context(
v8::Handle<v8::Context> context) const;
// Calls chromeHidden.<methodName> in each context for <extension_id>. If
// render_view is non-NULL, only call the function in contexts belonging to
// that view. The called javascript function should not return a value other
// than v8::Undefined(). A DCHECK is setup to break if it is otherwise.
void DispatchChromeHiddenMethod(const std::string& extension_id,
const std::string& method_name,
const base::ListValue& arguments,
RenderView* render_view,
const GURL& event_url) const;
private:
ContextSet contexts_;
DISALLOW_COPY_AND_ASSIGN(ChromeV8ContextSet);
};
#endif // CHROME_RENDERER_EXTENSIONS_CHROME_V8_CONTEXT_SET_H_
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