chrome/browser/extensions/extension_icon_manager.h

   1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_ICON_MANAGER_H_
   6 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_ICON_MANAGER_H_
   7
   8 #include <map>
   9 #include <set>
  10 #include <string>
  11
  12 #include "base/basictypes.h"
  13 #include "base/memory/weak_ptr.h"
  14 #include "third_party/skia/include/core/SkBitmap.h"
  15 #include "ui/gfx/insets.h"
  16
  17 namespace content {
  18 class BrowserContext;
  19 }
  20
  21 namespace extensions {
  22 class Extension;
  23 }
  24
  25 namespace gfx {
  26 class Image;
  27 }
  28
  29 class ExtensionIconManager {
  30  public:
  31   ExtensionIconManager();
  32   virtual ~ExtensionIconManager();
  33
  34   // Start loading the icon for the given extension.
  35   void LoadIcon(content::BrowserContext* context,
  36                 const extensions::Extension* extension);
  37
  38   // This returns a bitmap of width/height kFaviconSize, loaded either from an
  39   // entry specified in the extension's 'icon' section of the manifest, or a
  40   // default extension icon.
  41   const SkBitmap& GetIcon(const std::string& extension_id);
  42
  43   // Removes the extension's icon from memory.
  44   void RemoveIcon(const std::string& extension_id);
  45
  46   void set_monochrome(bool value) { monochrome_ = value; }
  47   void set_padding(const gfx::Insets& value) { padding_ = value; }
  48
  49  protected:
  50   virtual void OnImageLoaded(const std::string& extension_id,
  51                              const gfx::Image& image);
  52
  53  private:
  54   // Makes sure we've done one-time initialization of the default extension icon
  55   // default_icon_.
  56   void EnsureDefaultIcon();
  57
  58   // Helper function to return a copy of |src| with the proper scaling and
  59   // coloring.
  60   SkBitmap ApplyTransforms(const SkBitmap& src);
  61
  62   // Maps extension id to an SkBitmap with the icon for that extension.
  63   std::map<std::string, SkBitmap> icons_;
  64
  65   // Set of extension IDs waiting for icons to load.
  66   std::set<std::string> pending_icons_;
  67
  68   // The default icon we'll use if an extension doesn't have one.
  69   SkBitmap default_icon_;
  70
  71   // If true, we will desaturate the icons to make them monochromatic.
  72   bool monochrome_;
  73
  74   // Specifies the amount of empty padding to place around the icon.
  75   gfx::Insets padding_;
  76
  77   base::WeakPtrFactory<ExtensionIconManager> weak_ptr_factory_;
  78
  79   DISALLOW_COPY_AND_ASSIGN(ExtensionIconManager);
  80 };
  81
  82 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_ICON_MANAGER_H_