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// Copyright 2014 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_ENHANCED_BOOKMARKS_IMAGE_STORE_H_
#define COMPONENTS_ENHANCED_BOOKMARKS_IMAGE_STORE_H_
#include <map>
#include <set>
#include "base/sequence_checker.h"
#include "ui/gfx/image/image.h"
class GURL;
// The ImageStore keeps an image for each URL. This class is not thread safe,
// and will check the thread using base::ThreadChecker, except the constructor.
class ImageStore {
public:
ImageStore();
virtual ~ImageStore();
// Returns true if there is an image for this url.
virtual bool HasKey(const GURL& page_url) = 0;
// Inserts an image and its url in the store for the the given page url. The
// image can be null indicating that the download of the image at this URL or
// encoding for insertion failed previously. On non-ios platforms, |image|
// must have exactly one representation with a scale factor of 1.
virtual void Insert(const GURL& page_url,
const GURL& image_url,
const gfx::Image& image) = 0;
// Removes an image from the store.
virtual void Erase(const GURL& page_url) = 0;
// Returns the image associated with this url. Returns empty image and url if
// there are no image for this url. It also returns the image_url where the
// image was downloaded from or failed to be downloaded from.
virtual std::pair<gfx::Image, GURL> Get(const GURL& page_url) = 0;
// Returns the size of the image stored for this URL or empty size if no
// images are present.
virtual gfx::Size GetSize(const GURL& page_url) = 0;
// Populates |urls| with all the urls that have an image in the store.
virtual void GetAllPageUrls(std::set<GURL>* urls) = 0;
// Removes all images.
virtual void ClearAll() = 0;
// Moves an image from one url to another.
void ChangeImageURL(const GURL& from, const GURL& to);
// Returns the saved images storage size in bytes. If the storage doesn't
// exist yet or failed to read, returns -1.
virtual int64 GetStoreSizeInBytes() = 0;
protected:
base::SequenceChecker sequence_checker_;
private:
DISALLOW_COPY_AND_ASSIGN(ImageStore);
};
#endif // COMPONENTS_ENHANCED_BOOKMARKS_IMAGE_STORE_H_
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