blob: 8b5a2d3975da7d045960e0ebc03cee5d4983488d [file] [log] [blame]
// Copyright 2017 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.
#include "base/callback.h"
#include "components/ntp_tiles/popular_sites.h"
namespace ntp_tiles {
// Ensures that Popular Sites icons and MostLikely icons are cached, downloading
// and saving them if not.
// Does not provide any way to get a fetched favicon; use the FaviconService /
// LargeIconService for that. All this interface guarantees is that
// FaviconService will be able to get you an icon (if it exists).
class IconCacher {
virtual ~IconCacher() = default;
// Fetches the icon if necessary. If a new icon was fetched, the optional
// |icon_available| callback will be invoked.
// If there are preliminary icons (e.g. provided by static resources), the
// optional |preliminary_icon_available| callback will be invoked in addition.
// TODO(fhorschig): In case we keep these, make them OnceClosures.
virtual void StartFetchPopularSites(
PopularSites::Site site,
const base::Closure& icon_available,
const base::Closure& preliminary_icon_available) = 0;
// Fetches the icon if necessary, then invokes |done| with true if it was
// newly fetched (false if it was already cached or could not be fetched).
virtual void StartFetchMostLikely(const GURL& page_url,
const base::Closure& icon_available) = 0;
} // namespace ntp_tiles