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// Copyright (c) 2009 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_BROWSER_EXTENSIONS_EXTERNAL_EXTENSION_PROVIDER_H_
#define CHROME_BROWSER_EXTENSIONS_EXTERNAL_EXTENSION_PROVIDER_H_
#pragma once
#include <set>
#include <string>
#include "chrome/common/extensions/extension.h"
class FilePath;
class Version;
// This class is an abstract class for implementing external extensions
// providers.
class ExternalExtensionProvider {
public:
// ExternalExtensionProvider uses this interface to communicate back to the
// caller what extensions are registered, and which |id|, |version| and |path|
// they have. See also VisitRegisteredExtension below. Ownership of |version|
// is not transferred to the visitor.
class Visitor {
public:
virtual void OnExternalExtensionFileFound(
const std::string& id,
const Version* version,
const FilePath& path,
Extension::Location location) = 0;
virtual void OnExternalExtensionUpdateUrlFound(
const std::string& id,
const GURL& update_url,
Extension::Location location) = 0;
protected:
virtual ~Visitor() {}
};
virtual ~ExternalExtensionProvider() {}
// Enumerate registered extension, calling OnExternalExtensionFound on
// the |visitor| object for each registered extension found. |ids_to_ignore|
// contains a list of extension ids that should not result in a call back.
virtual void VisitRegisteredExtension(
Visitor* visitor, const std::set<std::string>& ids_to_ignore) const = 0;
// Test if this provider has an extension with id |id| registered.
virtual bool HasExtension(const std::string& id) const = 0;
// Gets details of an extension by its id. Output params will be set only
// if they are not NULL. If an output parameter is not specified by the
// provider type, it will not be changed.
// This function is no longer used outside unit tests.
virtual bool GetExtensionDetails(const std::string& id,
Extension::Location* location,
scoped_ptr<Version>* version) const = 0;
};
#endif // CHROME_BROWSER_EXTENSIONS_EXTERNAL_EXTENSION_PROVIDER_H_
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