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| 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/extension_icon_image.h" |
| 6 |
| 7 #include <vector> |
| 8 |
| 9 #include "chrome/browser/extensions/extension_icon_image_delegate.h" |
| 10 #include "chrome/common/chrome_notification_types.h" |
| 11 #include "chrome/common/extensions/extension.h" |
| 12 #include "content/public/browser/notification_service.h" |
| 13 #include "ui/gfx/image/image.h" |
| 14 #include "ui/gfx/image/image_skia_source.h" |
| 15 #include "ui/gfx/size.h" |
| 16 |
| 17 namespace { |
| 18 |
| 19 ExtensionResource GetExtensionIconResource( |
| 20 const extensions::Extension* extension, |
| 21 const ExtensionIconSet& icons, |
| 22 int size, |
| 23 ExtensionIconSet::MatchType match_type) { |
| 24 std::string path = icons.Get(size, match_type); |
| 25 if (path.empty()) |
| 26 return ExtensionResource(); |
| 27 |
| 28 return extension->GetResource(path); |
| 29 } |
| 30 |
| 31 } // namespace |
| 32 |
| 33 //////////////////////////////////////////////////////////////////////////////// |
| 34 // ExtensionIconImage::Source |
| 35 |
| 36 class ExtensionIconImage::Source : public gfx::ImageSkiaSource { |
| 37 public: |
| 38 explicit Source(ExtensionIconImage* host); |
| 39 virtual ~Source(); |
| 40 |
| 41 void ResetHost(); |
| 42 |
| 43 private: |
| 44 // gfx::ImageSkiaSource overrides: |
| 45 virtual gfx::ImageSkiaRep GetImageForScale( |
| 46 ui::ScaleFactor scale_factor) OVERRIDE; |
| 47 |
| 48 ExtensionIconImage* host_; |
| 49 |
| 50 DISALLOW_COPY_AND_ASSIGN(Source); |
| 51 }; |
| 52 |
| 53 ExtensionIconImage::Source::Source(ExtensionIconImage* host) |
| 54 : host_(host) { |
| 55 } |
| 56 |
| 57 ExtensionIconImage::Source::~Source() { |
| 58 } |
| 59 |
| 60 void ExtensionIconImage::Source::ResetHost() { |
| 61 host_ = NULL; |
| 62 } |
| 63 |
| 64 gfx::ImageSkiaRep ExtensionIconImage::Source::GetImageForScale( |
| 65 ui::ScaleFactor scale_factor) { |
| 66 if (host_) |
| 67 host_->LoadImageForScaleFactor(scale_factor); |
| 68 return gfx::ImageSkiaRep(); |
| 69 } |
| 70 |
| 71 //////////////////////////////////////////////////////////////////////////////// |
| 72 // ExtensionIconImage |
| 73 |
| 74 ExtensionIconImage::ExtensionIconImage( |
| 75 const extensions::Extension* extension, |
| 76 const ExtensionIconSet& icon_set, |
| 77 int resource_size_in_dip, |
| 78 ExtensionIconSet::MatchType resource_match_type, |
| 79 const gfx::Size& desired_size_in_dip, |
| 80 ImageLoadingTracker::CacheParam cache_param, |
| 81 ExtensionIconImageDelegate* delegate) |
| 82 : extension_(extension), |
| 83 icon_set_(icon_set), |
| 84 resource_size_in_dip_(resource_size_in_dip), |
| 85 resource_match_type_(resource_match_type), |
| 86 desired_size_in_dip_(desired_size_in_dip), |
| 87 cache_param_(cache_param), |
| 88 delegate_(delegate), |
| 89 source_(NULL), |
| 90 ALLOW_THIS_IN_INITIALIZER_LIST(tracker_(this)) { |
| 91 // Check whether extension has at least 1x resource. |
| 92 const int resource_size_in_pixel = resource_size_in_dip_; |
| 93 const bool can_load = ImageLoadingTracker::CanLoadImage( |
| 94 extension_, |
| 95 GetExtensionIconResource(extension_, |
| 96 icon_set_, |
| 97 resource_size_in_pixel, |
| 98 resource_match_type_)); |
| 99 if (!can_load) |
| 100 return; |
| 101 |
| 102 source_ = new Source(this); |
| 103 image_skia_ = gfx::ImageSkia(source_, desired_size_in_dip_); |
| 104 |
| 105 registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_UNLOADED, |
| 106 content::NotificationService::AllSources()); |
| 107 } |
| 108 |
| 109 ExtensionIconImage::~ExtensionIconImage() { |
| 110 // |source_| could be NULL if resource does not exist. |
| 111 if (source_) |
| 112 source_->ResetHost(); |
| 113 } |
| 114 |
| 115 void ExtensionIconImage::LoadImageForScaleFactor(ui::ScaleFactor scale_factor) { |
| 116 // Do nothing if extension is unloaded. |
| 117 if (!extension_) |
| 118 return; |
| 119 |
| 120 const float scale = ui::GetScaleFactorScale(scale_factor); |
| 121 const int resource_size_in_pixel = |
| 122 static_cast<int>(resource_size_in_dip_ * scale); |
| 123 |
| 124 ExtensionResource resource = GetExtensionIconResource( |
| 125 extension_, icon_set_, resource_size_in_pixel, resource_match_type_); |
| 126 // If resource does not exists, fallback to 1x if needed. |
| 127 if (!ImageLoadingTracker::CanLoadImage(extension_, resource)) { |
| 128 scale_factor = ui::SCALE_FACTOR_100P; |
| 129 if (image_skia_.HasRepresentation(scale_factor)) |
| 130 return; |
| 131 |
| 132 LoadImageForScaleFactor(scale_factor); |
| 133 return; |
| 134 } |
| 135 |
| 136 int id = tracker_.next_id(); |
| 137 load_map_[id] = scale_factor; |
| 138 |
| 139 std::vector<ImageLoadingTracker::ImageRepInfo> info_list; |
| 140 info_list.push_back(ImageLoadingTracker::ImageRepInfo( |
| 141 resource, |
| 142 ImageLoadingTracker::ImageRepInfo::ALWAYS_RESIZE, |
| 143 desired_size_in_dip_.Scale(scale), |
| 144 scale_factor)); |
| 145 tracker_.LoadImages(extension_, info_list, cache_param_); |
| 146 } |
| 147 |
| 148 void ExtensionIconImage::OnImageLoaded(const gfx::Image& image, |
| 149 const std::string& extension_id, |
| 150 int index) { |
| 151 if (image.IsEmpty()) |
| 152 return; |
| 153 |
| 154 LoadMap::iterator load_map_it = load_map_.find(index); |
| 155 DCHECK(load_map_it != load_map_.end()); |
| 156 |
| 157 ui::ScaleFactor scale_factor = load_map_it->second; |
| 158 DCHECK(image.ToImageSkia()->HasRepresentation(scale_factor)); |
| 159 gfx::ImageSkiaRep rep = image.ToImageSkia()->GetRepresentation(scale_factor); |
| 160 DCHECK(!rep.is_null()); |
| 161 image_skia_.AddRepresentation(rep); |
| 162 |
| 163 if (delegate_) |
| 164 delegate_->OnExtensionIconImageChanged(this); |
| 165 } |
| 166 |
| 167 void ExtensionIconImage::Observe(int type, |
| 168 const content::NotificationSource& source, |
| 169 const content::NotificationDetails& details) { |
| 170 DCHECK_EQ(type, chrome::NOTIFICATION_EXTENSION_UNLOADED); |
| 171 |
| 172 const extensions::Extension* extension = |
| 173 content::Details<extensions::UnloadedExtensionInfo>(details)->extension; |
| 174 |
| 175 if (extension_ == extension) |
| 176 extension_ = NULL; |
| 177 } |
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