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// Copyright 2015 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_MANIFEST_MANIFEST_ICON_DOWNLOADER_H_
#define CHROME_BROWSER_MANIFEST_MANIFEST_ICON_DOWNLOADER_H_
#include <vector>
#include "base/callback_forward.h"
#include "base/macros.h"
#include "third_party/skia/include/core/SkBitmap.h"
namespace content {
class WebContents;
} // namespace content
namespace gfx {
class Size;
} // namespace gfx
class GURL;
// Helper class which downloads the icon located at a specified. If the icon
// file contains multiple icons then it attempts to pick the one closest in size
// bigger than or equal to ideal_icon_size_in_dp, taking into account the
// density of the device. If a bigger icon is chosen then, the icon is scaled
// down to be equal to ideal_icon_size_in_dp. Smaller icons will be chosen down
// to the value specified by |minimum_icon_size_in_dp|.
class ManifestIconDownloader final {
public:
using IconFetchCallback = base::Callback<void(const SkBitmap&)>;
ManifestIconDownloader() = delete;
~ManifestIconDownloader() = delete;
// Returns whether the download has started.
// It will return false if the current context or information do not allow to
// download the image.
static bool Download(content::WebContents* web_contents,
const GURL& icon_url,
int ideal_icon_size_in_dp,
int minimum_icon_size_in_dp,
const IconFetchCallback& callback);
private:
class DevToolsConsoleHelper;
// Callback run after the manifest icon downloaded successfully or the
// download failed.
static void OnIconFetched(int ideal_icon_size_in_px,
int minimum_icon_size_in_px,
DevToolsConsoleHelper* console_helper,
const IconFetchCallback& callback,
int id,
int http_status_code,
const GURL& url,
const std::vector<SkBitmap>& bitmaps,
const std::vector<gfx::Size>& sizes);
static void ScaleIcon(int ideal_icon_size_in_px,
const SkBitmap& bitmap,
const IconFetchCallback& callback);
static int FindClosestBitmapIndex(int ideal_icon_size_in_px,
int minimum_icon_size_in_px,
const std::vector<SkBitmap>& bitmaps);
friend class ManifestIconDownloaderTest;
DISALLOW_COPY_AND_ASSIGN(ManifestIconDownloader);
};
#endif // CHROME_BROWSER_MANIFEST_MANIFEST_ICON_DOWNLOADER_H_
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