| // 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 CONTENT_PUBLIC_BROWSER_MANIFEST_ICON_DOWNLOADER_H_ |
| #define CONTENT_PUBLIC_BROWSER_MANIFEST_ICON_DOWNLOADER_H_ |
| |
| #include <vector> |
| |
| #include "base/callback_forward.h" |
| #include "base/macros.h" |
| #include "content/common/content_export.h" |
| |
| class GURL; |
| class SkBitmap; |
| |
| namespace gfx { |
| class Size; |
| } // namespace gfx |
| |
| namespace content { |
| |
| class WebContents; |
| |
| // Helper class which downloads the icon located at a specified URL. 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_px, 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_px. Smaller icons will be chosen down |
| // to the value specified by |minimum_icon_size_in_px|. |
| class CONTENT_EXPORT ManifestIconDownloader final { |
| public: |
| using IconFetchCallback = base::OnceCallback<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_px, |
| int minimum_icon_size_in_px, |
| IconFetchCallback callback, |
| bool square_only = true); |
| |
| // This threshold has been chosen arbitrarily and is open to any necessary |
| // changes in the future. |
| static const int kMaxWidthToHeightRatio = 5; |
| |
| 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, |
| bool square_only, |
| DevToolsConsoleHelper* console_helper, |
| 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_width_in_px, |
| int ideal_icon_height_in_px, |
| const SkBitmap& bitmap, |
| IconFetchCallback callback); |
| |
| static int FindClosestBitmapIndex(int ideal_icon_size_in_px, |
| int minimum_icon_size_in_px, |
| bool square_only, |
| const std::vector<SkBitmap>& bitmaps); |
| |
| friend class ManifestIconDownloaderTest; |
| |
| DISALLOW_COPY_AND_ASSIGN(ManifestIconDownloader); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_PUBLIC_BROWSER_MANIFEST_ICON_DOWNLOADER_H_ |