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// Copyright (c) 2012 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_H_
#define CHROME_RENDERER_EXTENSIONS_CHROME_V8_CONTEXT_H_
#include <string>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "chrome/renderer/extensions/module_system.h"
#include "chrome/renderer/extensions/request_sender.h"
#include "chrome/renderer/extensions/safe_builtins.h"
#include "chrome/renderer/extensions/scoped_persistent.h"
#include "extensions/common/features/feature.h"
#include "v8/include/v8.h"
namespace WebKit {
class WebFrame;
}
namespace content {
class RenderView;
}
namespace extensions {
class Extension;
// Chrome's wrapper for a v8 context.
class ChromeV8Context : public RequestSender::Source {
public:
ChromeV8Context(v8::Handle<v8::Context> context,
WebKit::WebFrame* frame,
const Extension* extension,
Feature::Context context_type);
virtual ~ChromeV8Context();
// Clears the WebFrame for this contexts and invalidates the associated
// ModuleSystem.
void Invalidate();
// Returns true if this context is still valid, false if it isn't.
// A context becomes invalid via Invalidate().
bool is_valid() const {
return !v8_context_.IsEmpty();
}
v8::Handle<v8::Context> v8_context() const {
return v8_context_.NewHandle(v8::Isolate::GetCurrent());
}
const Extension* extension() const {
return extension_.get();
}
WebKit::WebFrame* web_frame() const {
return web_frame_;
}
Feature::Context context_type() const {
return context_type_;
}
void set_module_system(scoped_ptr<ModuleSystem> module_system) {
module_system_ = module_system.Pass();
}
ModuleSystem* module_system() { return module_system_.get(); }
SafeBuiltins* safe_builtins() {
return &safe_builtins_;
}
const SafeBuiltins* safe_builtins() const {
return &safe_builtins_;
}
// Returns the ID of the extension associated with this context, or empty
// string if there is no such extension.
std::string GetExtensionID() const;
// Returns the RenderView associated with this context. Can return NULL if the
// context is in the process of being destroyed.
content::RenderView* GetRenderView() const;
// Get the URL of this context's web frame.
GURL GetURL() const;
// Runs |function| with appropriate scopes. Doesn't catch exceptions, callers
// must do that if they want.
//
// USE THIS METHOD RATHER THAN v8::Function::Call WHEREVER POSSIBLE.
v8::Local<v8::Value> CallFunction(v8::Handle<v8::Function> function,
int argc,
v8::Handle<v8::Value> argv[]) const;
// Fires the onunload event on the unload_event module.
void DispatchOnUnloadEvent();
// Returns the availability of the API |api_name|.
Feature::Availability GetAvailability(const std::string& api_name);
// Returns whether the API |api_name| or any part of the API could be
// available in this context without taking into account the context's
// extension.
bool IsAnyFeatureAvailableToContext(const std::string& api_name);
// Returns a string description of the type of context this is.
std::string GetContextTypeDescription();
// RequestSender::Source implementation.
virtual ChromeV8Context* GetContext() OVERRIDE;
virtual void OnResponseReceived(const std::string& name,
int request_id,
bool success,
const base::ListValue& response,
const std::string& error) OVERRIDE;
v8::Isolate* isolate() const {
return isolate_;
}
private:
// The v8 context the bindings are accessible to.
ScopedPersistent<v8::Context> v8_context_;
// The WebFrame associated with this context. This can be NULL because this
// object can outlive is destroyed asynchronously.
WebKit::WebFrame* web_frame_;
// The extension associated with this context, or NULL if there is none. This
// might be a hosted app in the case that this context is hosting a web URL.
scoped_refptr<const Extension> extension_;
// The type of context.
Feature::Context context_type_;
// Owns and structures the JS that is injected to set up extension bindings.
scoped_ptr<ModuleSystem> module_system_;
// Contains safe copies of builtin objects like Function.prototype.
SafeBuiltins safe_builtins_;
v8::Isolate* isolate_;
DISALLOW_COPY_AND_ASSIGN(ChromeV8Context);
};
} // namespace extensions
#endif // CHROME_RENDERER_EXTENSIONS_CHROME_V8_CONTEXT_H_
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