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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_
#include <set>
#include <string>
#include "base/version.h"
#include "chrome/common/extensions/extension.h"
class FilePath;
// 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 OnExternalExtensionFound(const std::string& id,
const Version* version,
const FilePath& path,
Extension::Location location) = 0;
};
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;
// Gets the version of extension with |id| and its |location|. |location| can
// be NULL. The caller is responsible for cleaning up the Version object
// returned. This function returns NULL if the extension is not found.
virtual Version* RegisteredVersion(const std::string& id,
Extension::Location* location) const = 0;
};
#endif // CHROME_BROWSER_EXTENSIONS_EXTERNAL_EXTENSION_PROVIDER_H_
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