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// Copyright 2016 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_PREVIEWS_CONTENT_PREVIEWS_DECIDER_H_
#define COMPONENTS_PREVIEWS_CONTENT_PREVIEWS_DECIDER_H_
#include "components/previews/core/previews_experiments.h"
namespace content {
class NavigationHandle;
} // namespace content
namespace previews {
class PreviewsUserData;
class PreviewsDecider {
public:
// Whether the URL for |navigation_handle| is allowed to show a preview of
// |type| as can be determined at the start of a navigation (or start of a
// redirection). This can be further checked at navigation commit time via
// |ShouldCommitPreview|. Some types of previews will be checked for an
// applicable network quality threshold - these are client previews that do
// not have optimization hint support. Previews with optimization hint support
// can have variable network quality thresholds based on the committed URL.
// Data Reduction Proxy previews (i.e., LITE_PAGE) perform a network quality
// check on the server.
virtual bool ShouldAllowPreviewAtNavigationStart(
PreviewsUserData* previews_data,
content::NavigationHandle* navigation_handle,
bool is_reload,
PreviewsType type) const = 0;
// Whether the URL for |navigation_handle| is allowed to show a preview of
// |type|.
virtual bool ShouldCommitPreview(PreviewsUserData* previews_data,
content::NavigationHandle* navigation_handle,
PreviewsType type) const = 0;
protected:
PreviewsDecider() {}
virtual ~PreviewsDecider() {}
};
} // namespace previews
#endif // COMPONENTS_PREVIEWS_CONTENT_PREVIEWS_DECIDER_H_
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