app_list: Add web store search.

chrome/browser/ui/app_list/search/webstore_result_icon_source.h

Index: chrome/browser/ui/app_list/search/webstore_result_icon_source.h
diff --git a/chrome/browser/ui/app_list/search/webstore_result_icon_source.h b/chrome/browser/ui/app_list/search/webstore_result_icon_source.h
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index 0000000000000000000000000000000000000000..06b4fed33b1c9510c18045e7c896ecf8c82f3ff5
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+++ b/chrome/browser/ui/app_list/search/webstore_result_icon_source.h
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+// Copyright 2013 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_UI_APP_LIST_SEARCH_WEBSTORE_RESULT_ICON_SOURCE_H_
+#define CHROME_BROWSER_UI_APP_LIST_SEARCH_WEBSTORE_RESULT_ICON_SOURCE_H_
+
+#include "base/basictypes.h"
+#include "base/callback.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "chrome/browser/image_decoder.h"
+#include "googleurl/src/gurl.h"
+#include "net/url_request/url_fetcher_delegate.h"
+#include "ui/gfx/image/image_skia.h"
+#include "ui/gfx/image/image_skia_source.h"
+
+namespace net {
+class URLFetcher;
+class URLRequestContextGetter;
+}
+
+namespace app_list {
+
+// An ImageSkiaSource for the icon of web store result. It shows web store
+// icon before the app icon is fetched. When the app icon is fetched
+// successfully, it creates an representation using the app icon and web store
+// icon as a badge.
+class WebstoreResultIconSource : public gfx::ImageSkiaSource,
+                                 public net::URLFetcherDelegate,
+                                 public ImageDecoder::Delegate {
+ public:
+  typedef base::Closure IconLoadedCallback;
+
+  WebstoreResultIconSource(const IconLoadedCallback& icon_loaded_callback,
+                           net::URLRequestContextGetter* context_getter,
+                           const GURL& icon_url,
+                           int icon_size);
+  virtual ~WebstoreResultIconSource();
+
+ private:
+  // Invoked from GetImageForScale to download the app icon when the hosting
+  // ImageSkia gets painted on screen.
+  void StartIconFetch();
+
+  // Creates the result icon by putting a small web store icon on the bottom
+  // right corner as a badge.
+  gfx::ImageSkiaRep CreateBadgedIcon(ui::ScaleFactor scale_factor);
+
+  // gfx::ImageSkiaSource overrides:
+  virtual gfx::ImageSkiaRep GetImageForScale(
+      ui::ScaleFactor scale_factor) OVERRIDE;
+
+  // net::URLFetcherDelegate overrides:
+  virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;
+
+  // ImageDecoder::Delegate overrides:
+  virtual void OnImageDecoded(const ImageDecoder* decoder,
+                              const SkBitmap& decoded_image) OVERRIDE;
+  virtual void OnDecodeImageFailed(const ImageDecoder* decoder) OVERRIDE;
+
+  IconLoadedCallback icon_loaded_callback_;
+  net::URLRequestContextGetter* context_getter_;
+  const GURL icon_url_;
+  const int icon_size_;
+
+  bool icon_fetch_attempted_;
+  scoped_ptr<net::URLFetcher> icon_fetcher_;
+
+  scoped_refptr<ImageDecoder> image_decoder_;
+
+  gfx::ImageSkia icon_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebstoreResultIconSource);
+};
+
+}  // namespace app_list
+
+#endif  // CHROME_BROWSER_UI_APP_LIST_SEARCH_WEBSTORE_RESULT_ICON_SOURCE_H_