src/chrome/browser/extensions/app_icon_loader_impl.cc

   1 // Copyright (c) 2012 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 #include "chrome/browser/extensions/app_icon_loader_impl.h"
   6
   7 #include "base/stl_util.h"
   8 #include "chrome/browser/extensions/extension_service.h"
   9 #include "chrome/browser/extensions/extension_util.h"
  10 #include "chrome/browser/profiles/profile.h"
  11 #include "chrome/common/extensions/extension_constants.h"
  12 #include "extensions/browser/extension_system.h"
  13 #include "extensions/common/extension.h"
  14 #include "extensions/common/manifest_handlers/icons_handler.h"
  15 #include "ui/gfx/color_utils.h"
  16 #include "ui/gfx/image/image_skia_operations.h"
  17
  18 namespace {
  19
  20 const extensions::Extension* GetExtensionByID(Profile* profile,
  21                                               const std::string& id) {
  22   ExtensionService* service =
  23       extensions::ExtensionSystem::Get(profile)->extension_service();
  24   if (!service)
  25     return NULL;
  26   return service->GetInstalledExtension(id);
  27 }
  28
  29 }  // namespace
  30
  31 namespace extensions {
  32
  33 AppIconLoaderImpl::AppIconLoaderImpl(
  34     Profile* profile,
  35     int icon_size,
  36     AppIconLoader::Delegate* delegate)
  37     : profile_(profile),
  38       delegate_(delegate),
  39       icon_size_(icon_size) {
  40
  41 }
  42
  43 AppIconLoaderImpl::~AppIconLoaderImpl() {
  44   STLDeleteContainerPairFirstPointers(map_.begin(), map_.end());
  45 }
  46
  47 void AppIconLoaderImpl::FetchImage(const std::string& id) {
  48   for (ImageToExtensionIDMap::const_iterator i = map_.begin();
  49        i != map_.end(); ++i) {
  50     if (i->second == id)
  51       return;  // Already loading the image.
  52   }
  53
  54   const extensions::Extension* extension = GetExtensionByID(profile_, id);
  55   if (!extension)
  56     return;
  57
  58   extensions::IconImage* image = new extensions::IconImage(
  59       profile_,
  60       extension,
  61       extensions::IconsInfo::GetIcons(extension),
  62       icon_size_,
  63       extensions::util::GetDefaultAppIcon(),
  64       this);
  65   // |map_| takes ownership of |image|.
  66   map_[image] = id;
  67
  68   // Triggers image loading now instead of depending on paint message. This
  69   // makes the temp blank image be shown for shorter time and improves user
  70   // experience. See http://crbug.com/146114.
  71   image->image_skia().EnsureRepsForSupportedScales();
  72 }
  73
  74 void AppIconLoaderImpl::ClearImage(const std::string& id) {
  75   for (ImageToExtensionIDMap::iterator i = map_.begin();
  76        i != map_.end(); ++i) {
  77     if (i->second == id) {
  78       delete i->first;
  79       map_.erase(i);
  80       break;
  81     }
  82   }
  83 }
  84
  85 void AppIconLoaderImpl::UpdateImage(const std::string& id) {
  86   for (ImageToExtensionIDMap::iterator i = map_.begin();
  87        i != map_.end(); ++i) {
  88     if (i->second == id) {
  89       BuildImage(i->second, i->first->image_skia());
  90       break;
  91     }
  92   }
  93 }
  94
  95 void AppIconLoaderImpl::OnExtensionIconImageChanged(
  96     extensions::IconImage* image) {
  97   ImageToExtensionIDMap::iterator i = map_.find(image);
  98   if (i == map_.end())
  99     return;  // The image has been removed, do nothing.
 100
 101   BuildImage(i->second, i->first->image_skia());
 102 }
 103
 104 void AppIconLoaderImpl::BuildImage(const std::string& id,
 105                                    const gfx::ImageSkia& icon) {
 106   gfx::ImageSkia image = icon;
 107
 108   if (!util::IsAppLaunchable(id, profile_)) {
 109     const color_utils::HSL shift = {-1, 0, 0.6};
 110     image = gfx::ImageSkiaOperations::CreateHSLShiftedImage(image, shift);
 111   }
 112
 113   delegate_->SetAppImage(id, image);
 114 }
 115
 116 }  // namespace extensions