Support custom icon in search result.

chrome/browser/ui/app_list/search/launcher_search/extension_badged_icon_image.h

Index: chrome/browser/ui/app_list/search/launcher_search/extension_badged_icon_image.h
diff --git a/chrome/browser/ui/app_list/search/launcher_search/extension_badged_icon_image.h b/chrome/browser/ui/app_list/search/launcher_search/extension_badged_icon_image.h
new file mode 100644
index 0000000000000000000000000000000000000000..380dbe0ce773464edabb1e1f463267e5b9b8eb9a
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+++ b/chrome/browser/ui/app_list/search/launcher_search/extension_badged_icon_image.h
@@ -0,0 +1,96 @@
+// 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_UI_APP_LIST_SEARCH_LAUNCHER_SEARCH_EXTENSION_BADGED_ICON_IMAGE_H_
+#define CHROME_BROWSER_UI_APP_LIST_SEARCH_LAUNCHER_SEARCH_EXTENSION_BADGED_ICON_IMAGE_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "chrome/browser/chromeos/launcher_search_provider/error_reporter.h"
+#include "chrome/browser/profiles/profile.h"
+#include "extensions/common/extension.h"
+#include "ui/gfx/image/image.h"
+#include "ui/gfx/image/image_skia.h"
+#include "url/gurl.h"
+
+namespace app_list {
+
+// Provides an icon image which is badged with extension icon. If custom icon
+// image is not specified, extension icon will be used.
+class ExtensionBadgedIconImage {
+ public:
+  class Observer {
+   public:
+    // Called when icon image is changed. To obtain the new image, call
+    // GetIconImage method.
+    virtual void OnIconImageChanged(ExtensionBadgedIconImage* image) = 0;
+  };
+
+  // If |custom_icon_url| is empty, uses the extension icon.
+  ExtensionBadgedIconImage(
+      const GURL& custom_icon_url,
+      Profile* profile,
+      const extensions::Extension* extension,
+      const int icon_dimension,
+      scoped_ptr<chromeos::launcher_search_provider::ErrorReporter>
+          error_reporter);
+  virtual ~ExtensionBadgedIconImage();
+
+  // Load resources caller must call this function to generate icon image.
+  void LoadResources();
+
+  // Adds |observer| to listen icon image changed event. To get fresh icon
+  // image, you need to add observer before you call GetIconImage.
+  void AddObserver(Observer* observer);
+
+  // Removes |observer|.
+  void RemoveObserver(Observer* observer);
+
+  // Returns badged icon image
+  const gfx::ImageSkia& GetIconImage() const;
+
+ protected:
+  // Loads |extension| icon and returns it as sync if possible. When it loads
+  // icon as async, it calls OnExtensionIconImageChanged.
+  virtual const gfx::ImageSkia& LoadExtensionIcon() = 0;
+
+  // Loads |icon_url_| as async. When it loads an image, OnCustomIconLoaded will
+  // be called with an image. When it fails to load an image, OnCustomIconLoaded
+  // will be called with an empty image.
+  virtual void LoadIconResourceFromExtension() = 0;
+
+  // Called when extension icon image is changed.
+  void OnExtensionIconChanged(const gfx::ImageSkia& image);
+
+  // Called when custom icon image is loaded.
+  void OnCustomIconLoaded(const gfx::ImageSkia& image);
+
+  Profile* profile_;
+  const extensions::Extension* extension_;
+  const GURL icon_url_;
+  const gfx::Size icon_size_;
+
+ private:
+  // Updates icon image.
+  void Update();
+
+  // Sets new icon image, and notify to observers.
+  void SetIconImage(const gfx::ImageSkia& image);
+
+  // Returns truncated icon url. Since max_size includes trailing ..., it should
+  // be larger than 3.
+  std::string GetTruncatedIconUrl(const uint32 max_size);
+
+  gfx::ImageSkia extension_icon_image_;
+  gfx::ImageSkia custom_icon_image_;
+  gfx::ImageSkia badged_icon_image_;
+
+  scoped_ptr<chromeos::launcher_search_provider::ErrorReporter> error_reporter_;
+  std::set<Observer*> observers_;
+
+  DISALLOW_COPY_AND_ASSIGN(ExtensionBadgedIconImage);
+};
+
+}  // namespace app_list
+
+#endif  // CHROME_BROWSER_UI_APP_LIST_SEARCH_LAUNCHER_SEARCH_EXTENSION_BADGED_ICON_IMAGE_H_