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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 COMPONENTS_VISITEDLINK_BROWSER_VISITEDLINK_DELEGATE_H_
#define COMPONENTS_VISITEDLINK_BROWSER_VISITEDLINK_DELEGATE_H_
#include "base/memory/ref_counted.h"
class GURL;
namespace content {
class BrowserContext;
} // namespace content
namespace components {
// Delegate class that clients of VisitedLinkMaster must implement.
class VisitedLinkDelegate {
public:
// See RebuildTable.
class URLEnumerator : public base::RefCountedThreadSafe<URLEnumerator> {
public:
// Call this with each URL to rebuild the table.
virtual void OnURL(const GURL& url) = 0;
// This must be called by Delegate after RebuildTable is called. |success|
// indicates all URLs have been returned successfully. The URLEnumerator
// object cannot be used by the delegate after this call.
virtual void OnComplete(bool success) = 0;
protected:
virtual ~URLEnumerator() {}
private:
friend class base::RefCountedThreadSafe<URLEnumerator>;
};
// Delegate class is responsible for persisting the list of visited URLs
// across browser runs. This is called by VisitedLinkMaster to repopulate
// its internal table. Note that methods on enumerator can be called on any
// thread but the delegate is responsible for synchronizating the calls.
virtual void RebuildTable(const scoped_refptr<URLEnumerator>& enumerator) = 0;
protected:
virtual ~VisitedLinkDelegate() {}
};
} // namespace components
#endif // COMPONENTS_VISITEDLINK_BROWSER_VISITEDLINK_DELEGATE_H_
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