Index: chrome/browser/manifest/manifest_icon_downloader.h |
diff --git a/chrome/browser/manifest/manifest_icon_downloader.h b/chrome/browser/manifest/manifest_icon_downloader.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..594337f3a6e1cc5425f738e1e9e3e894d1cf9fab |
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+++ b/chrome/browser/manifest/manifest_icon_downloader.h |
@@ -0,0 +1,69 @@ |
+// 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/basictypes.h" |
+#include "base/callback_forward.h" |
+#include "third_party/skia/include/core/SkBitmap.h" |
+ |
+namespace content { |
+class WebContents; |
+} // namespace content |
+ |
+namespace gfx { |
+class Size; |
+} // namespace gfx |
+ |
+class GURL; |
+ |
+// Downloads the icon located at icon_url. If the file contains multiple icons |
mlamouri (slow - plz ping)
2015/08/21 13:34:18
nit: say it's a helper.
Lalit Maganti
2015/08/21 13:45:51
Done.
|
+// 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. |
+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, |
+ const IconFetchCallback& callback); |
+ |
+ private: |
+ // 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, |
+ 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_ |