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_system.h"
  10 #include "chrome/browser/profiles/profile.h"
  11 #include "chrome/common/extensions/extension.h"
  12 #include "chrome/common/extensions/extension_constants.h"
  13 #include "chrome/common/extensions/manifest_handlers/icons_handler.h"
  14 #include "ui/gfx/color_utils.h"
  15 #include "ui/gfx/image/image_skia_operations.h"
  16
  17 namespace {
  18
  19 const extensions::Extension* GetExtensionByID(Profile* profile,
  20                                               const std::string& id) {
  21   ExtensionService* service =
  22       extensions::ExtensionSystem::Get(profile)->extension_service();
  23   if (!service)
  24     return NULL;
  25   return service->GetInstalledExtension(id);
  26 }
  27
  28 }  // namespace
  29
  30 namespace extensions {
  31
  32 AppIconLoaderImpl::AppIconLoaderImpl(
  33     Profile* profile,
  34     int icon_size,
  35     AppIconLoader::Delegate* delegate)
  36     : profile_(profile),
  37       delegate_(delegate),
  38       icon_size_(icon_size) {
  39
  40 }
  41
  42 AppIconLoaderImpl::~AppIconLoaderImpl() {
  43   STLDeleteContainerPairFirstPointers(map_.begin(), map_.end());
  44 }
  45
  46 void AppIconLoaderImpl::FetchImage(const std::string& id) {
  47   for (ImageToExtensionIDMap::const_iterator i = map_.begin();
  48        i != map_.end(); ++i) {
  49     if (i->second == id)
  50       return;  // Already loading the image.
  51   }
  52
  53   const extensions::Extension* extension = GetExtensionByID(profile_, id);
  54   if (!extension)
  55     return;
  56
  57   extensions::IconImage* image = new extensions::IconImage(
  58       profile_,
  59       extension,
  60       extensions::IconsInfo::GetIcons(extension),
  61       icon_size_,
  62       extensions::IconsInfo::GetDefaultAppIcon(),
  63       this);
  64   // |map_| takes ownership of |image|.
  65   map_[image] = id;
  66
  67   // Triggers image loading now instead of depending on paint message. This
  68   // makes the temp blank image be shown for shorter time and improves user
  69   // experience. See http://crbug.com/146114.
  70   image->image_skia().EnsureRepsForSupportedScales();
  71 }
  72
  73 void AppIconLoaderImpl::ClearImage(const std::string& id) {
  74   for (ImageToExtensionIDMap::iterator i = map_.begin();
  75        i != map_.end(); ++i) {
  76     if (i->second == id) {
  77       delete i->first;
  78       map_.erase(i);
  79       break;
  80     }
  81   }
  82 }
  83
  84 void AppIconLoaderImpl::UpdateImage(const std::string& id) {
  85   for (ImageToExtensionIDMap::iterator i = map_.begin();
  86        i != map_.end(); ++i) {
  87     if (i->second == id) {
  88       BuildImage(i->second, i->first->image_skia());
  89       break;
  90     }
  91   }
  92 }
  93
  94 void AppIconLoaderImpl::OnExtensionIconImageChanged(
  95     extensions::IconImage* image) {
  96   ImageToExtensionIDMap::iterator i = map_.find(image);
  97   if (i == map_.end())
  98     return;  // The image has been removed, do nothing.
  99
 100   BuildImage(i->second, i->first->image_skia());
 101 }
 102
 103 void AppIconLoaderImpl::BuildImage(const std::string& id,
 104                                    const gfx::ImageSkia& icon) {
 105   gfx::ImageSkia image = icon;
 106
 107   const ExtensionService* service =
 108       extensions::ExtensionSystem::Get(profile_)->extension_service();
 109   const bool enabled = service->IsExtensionEnabledForLauncher(id);
 110   if (!enabled) {
 111     const color_utils::HSL shift = {-1, 0, 0.6};
 112     image = gfx::ImageSkiaOperations::CreateHSLShiftedImage(image, shift);
 113   }
 114
 115   delegate_->SetAppImage(id, image);
 116 }
 117
 118 }  // namespace extensions