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/ui/webui/extensions/extension_icon_source.h" 6 7 #include "base/bind.h" 8 #include "base/bind_helpers.h" 9 #include "base/memory/ref_counted_memory.h" 10 #include "base/stl_util.h" 11 #include "base/strings/string_number_conversions.h" 12 #include "base/strings/string_split.h" 13 #include "base/strings/string_util.h" 14 #include "base/strings/stringprintf.h" 15 #include "base/threading/thread.h" 16 #include "chrome/browser/extensions/extension_service.h" 17 #include "chrome/browser/favicon/favicon_service_factory.h" 18 #include "chrome/browser/profiles/profile.h" 19 #include "chrome/common/extensions/extension_constants.h" 20 #include "chrome/common/extensions/manifest_handlers/app_launch_info.h" 21 #include "chrome/common/url_constants.h" 22 #include "extensions/browser/extension_prefs.h" 23 #include "extensions/browser/extension_system.h" 24 #include "extensions/browser/image_loader.h" 25 #include "extensions/common/extension.h" 26 #include "extensions/common/extension_resource.h" 27 #include "extensions/common/manifest_handlers/icons_handler.h" 28 #include "extensions/grit/extensions_browser_resources.h" 29 #include "grit/component_extension_resources_map.h" 30 #include "skia/ext/image_operations.h" 31 #include "ui/base/layout.h" 32 #include "ui/base/resource/resource_bundle.h" 33 #include "ui/gfx/codec/png_codec.h" 34 #include "ui/gfx/color_utils.h" 35 #include "ui/gfx/favicon_size.h" 36 #include "ui/gfx/size.h" 37 #include "ui/gfx/skbitmap_operations.h" 38 #include "url/gurl.h" 39 40 namespace extensions { 41 42 namespace { 43 44 scoped_refptr<base::RefCountedMemory> BitmapToMemory(const SkBitmap* image) { 45 base::RefCountedBytes* image_bytes = new base::RefCountedBytes; 46 gfx::PNGCodec::EncodeBGRASkBitmap(*image, false, &image_bytes->data()); 47 return image_bytes; 48 } 49 50 SkBitmap DesaturateImage(const SkBitmap* image) { 51 color_utils::HSL shift = {-1, 0, 0.6}; 52 return SkBitmapOperations::CreateHSLShiftedBitmap(*image, shift); 53 } 54 55 SkBitmap* ToBitmap(const unsigned char* data, size_t size) { 56 SkBitmap* decoded = new SkBitmap(); 57 bool success = gfx::PNGCodec::Decode(data, size, decoded); 58 DCHECK(success); 59 return decoded; 60 } 61 62 } // namespace 63 64 ExtensionIconSource::ExtensionIconSource(Profile* profile) : profile_(profile) { 65 } 66 67 struct ExtensionIconSource::ExtensionIconRequest { 68 content::URLDataSource::GotDataCallback callback; 69 scoped_refptr<const Extension> extension; 70 bool grayscale; 71 int size; 72 ExtensionIconSet::MatchType match; 73 }; 74 75 // static 76 GURL ExtensionIconSource::GetIconURL(const Extension* extension, 77 int icon_size, 78 ExtensionIconSet::MatchType match, 79 bool grayscale, 80 bool* exists) { 81 if (exists) { 82 *exists = 83 IconsInfo::GetIconURL(extension, icon_size, match) != GURL::EmptyGURL(); 84 } 85 86 GURL icon_url(base::StringPrintf("%s%s/%d/%d%s", 87 chrome::kChromeUIExtensionIconURL, 88 extension->id().c_str(), 89 icon_size, 90 match, 91 grayscale ? "?grayscale=true" : "")); 92 CHECK(icon_url.is_valid()); 93 return icon_url; 94 } 95 96 // static 97 SkBitmap* ExtensionIconSource::LoadImageByResourceId(int resource_id) { 98 std::string contents = ResourceBundle::GetSharedInstance() 99 .GetRawDataResourceForScale(resource_id, 100 ui::SCALE_FACTOR_100P).as_string(); 101 102 // Convert and return it. 103 const unsigned char* data = 104 reinterpret_cast<const unsigned char*>(contents.data()); 105 return ToBitmap(data, contents.length()); 106 } 107 108 std::string ExtensionIconSource::GetSource() const { 109 return chrome::kChromeUIExtensionIconHost; 110 } 111 112 std::string ExtensionIconSource::GetMimeType(const std::string&) const { 113 // We need to explicitly return a mime type, otherwise if the user tries to 114 // drag the image they get no extension. 115 return "image/png"; 116 } 117 118 void ExtensionIconSource::StartDataRequest( 119 const std::string& path, 120 int render_process_id, 121 int render_frame_id, 122 const content::URLDataSource::GotDataCallback& callback) { 123 // This is where everything gets started. First, parse the request and make 124 // the request data available for later. 125 static int next_id = 0; 126 if (!ParseData(path, ++next_id, callback)) { 127 // If the request data cannot be parsed, request parameters will not be 128 // added to |request_map_|. 129 // Send back the default application icon (not resized or desaturated) as 130 // the default response. 131 callback.Run(BitmapToMemory(GetDefaultAppImage()).get()); 132 return; 133 } 134 135 ExtensionIconRequest* request = GetData(next_id); 136 ExtensionResource icon = IconsInfo::GetIconResource( 137 request->extension.get(), request->size, request->match); 138 139 if (icon.relative_path().empty()) { 140 LoadIconFailed(next_id); 141 } else { 142 LoadExtensionImage(icon, next_id); 143 } 144 } 145 146 ExtensionIconSource::~ExtensionIconSource() { 147 // Clean up all the temporary data we're holding for requests. 148 STLDeleteValues(&request_map_); 149 } 150 151 const SkBitmap* ExtensionIconSource::GetDefaultAppImage() { 152 if (!default_app_data_.get()) 153 default_app_data_.reset(LoadImageByResourceId(IDR_APP_DEFAULT_ICON)); 154 155 return default_app_data_.get(); 156 } 157 158 const SkBitmap* ExtensionIconSource::GetDefaultExtensionImage() { 159 if (!default_extension_data_.get()) { 160 default_extension_data_.reset( 161 LoadImageByResourceId(IDR_EXTENSION_DEFAULT_ICON)); 162 } 163 164 return default_extension_data_.get(); 165 } 166 167 void ExtensionIconSource::FinalizeImage(const SkBitmap* image, 168 int request_id) { 169 SkBitmap bitmap; 170 ExtensionIconRequest* request = GetData(request_id); 171 if (request->grayscale) 172 bitmap = DesaturateImage(image); 173 else 174 bitmap = *image; 175 176 request->callback.Run(BitmapToMemory(&bitmap).get()); 177 ClearData(request_id); 178 } 179 180 void ExtensionIconSource::LoadDefaultImage(int request_id) { 181 ExtensionIconRequest* request = GetData(request_id); 182 const SkBitmap* default_image = NULL; 183 184 if (request->extension->is_app()) 185 default_image = GetDefaultAppImage(); 186 else 187 default_image = GetDefaultExtensionImage(); 188 189 SkBitmap resized_image(skia::ImageOperations::Resize( 190 *default_image, skia::ImageOperations::RESIZE_LANCZOS3, 191 request->size, request->size)); 192 193 // There are cases where Resize returns an empty bitmap, for example if you 194 // ask for an image too large. In this case it is better to return the default 195 // image than returning nothing at all. 196 if (resized_image.empty()) 197 resized_image = *default_image; 198 199 FinalizeImage(&resized_image, request_id); 200 } 201 202 void ExtensionIconSource::LoadExtensionImage(const ExtensionResource& icon, 203 int request_id) { 204 ExtensionIconRequest* request = GetData(request_id); 205 ImageLoader::Get(profile_)->LoadImageAsync( 206 request->extension.get(), 207 icon, 208 gfx::Size(request->size, request->size), 209 base::Bind(&ExtensionIconSource::OnImageLoaded, AsWeakPtr(), request_id)); 210 } 211 212 void ExtensionIconSource::LoadFaviconImage(int request_id) { 213 FaviconService* favicon_service = 214 FaviconServiceFactory::GetForProfile(profile_, Profile::EXPLICIT_ACCESS); 215 // Fall back to the default icons if the service isn't available. 216 if (favicon_service == NULL) { 217 LoadDefaultImage(request_id); 218 return; 219 } 220 221 GURL favicon_url = 222 AppLaunchInfo::GetFullLaunchURL(GetData(request_id)->extension.get()); 223 favicon_service->GetRawFaviconForPageURL( 224 favicon_url, 225 favicon_base::FAVICON, 226 gfx::kFaviconSize, 227 base::Bind(&ExtensionIconSource::OnFaviconDataAvailable, 228 base::Unretained(this), 229 request_id), 230 &cancelable_task_tracker_); 231 } 232 233 void ExtensionIconSource::OnFaviconDataAvailable( 234 int request_id, 235 const favicon_base::FaviconRawBitmapResult& bitmap_result) { 236 ExtensionIconRequest* request = GetData(request_id); 237 238 // Fallback to the default icon if there wasn't a favicon. 239 if (!bitmap_result.is_valid()) { 240 LoadDefaultImage(request_id); 241 return; 242 } 243 244 if (!request->grayscale) { 245 // If we don't need a grayscale image, then we can bypass FinalizeImage 246 // to avoid unnecessary conversions. 247 request->callback.Run(bitmap_result.bitmap_data.get()); 248 ClearData(request_id); 249 } else { 250 FinalizeImage(ToBitmap(bitmap_result.bitmap_data->front(), 251 bitmap_result.bitmap_data->size()), request_id); 252 } 253 } 254 255 void ExtensionIconSource::OnImageLoaded(int request_id, 256 const gfx::Image& image) { 257 if (image.IsEmpty()) 258 LoadIconFailed(request_id); 259 else 260 FinalizeImage(image.ToSkBitmap(), request_id); 261 } 262 263 void ExtensionIconSource::LoadIconFailed(int request_id) { 264 ExtensionIconRequest* request = GetData(request_id); 265 ExtensionResource icon = IconsInfo::GetIconResource( 266 request->extension.get(), request->size, request->match); 267 268 if (request->size == extension_misc::EXTENSION_ICON_BITTY) 269 LoadFaviconImage(request_id); 270 else 271 LoadDefaultImage(request_id); 272 } 273 274 bool ExtensionIconSource::ParseData( 275 const std::string& path, 276 int request_id, 277 const content::URLDataSource::GotDataCallback& callback) { 278 // Extract the parameters from the path by lower casing and splitting. 279 std::string path_lower = base::StringToLowerASCII(path); 280 std::vector<std::string> path_parts; 281 282 base::SplitString(path_lower, '/', &path_parts); 283 if (path_lower.empty() || path_parts.size() < 3) 284 return false; 285 286 std::string size_param = path_parts.at(1); 287 std::string match_param = path_parts.at(2); 288 match_param = match_param.substr(0, match_param.find('?')); 289 290 int size; 291 if (!base::StringToInt(size_param, &size)) 292 return false; 293 if (size <= 0 || size > extension_misc::EXTENSION_ICON_GIGANTOR) 294 return false; 295 296 ExtensionIconSet::MatchType match_type; 297 int match_num; 298 if (!base::StringToInt(match_param, &match_num)) 299 return false; 300 match_type = static_cast<ExtensionIconSet::MatchType>(match_num); 301 if (!(match_type == ExtensionIconSet::MATCH_EXACTLY || 302 match_type == ExtensionIconSet::MATCH_SMALLER || 303 match_type == ExtensionIconSet::MATCH_BIGGER)) 304 match_type = ExtensionIconSet::MATCH_EXACTLY; 305 306 std::string extension_id = path_parts.at(0); 307 const Extension* extension = ExtensionSystem::Get(profile_)-> 308 extension_service()->GetInstalledExtension(extension_id); 309 if (!extension) 310 return false; 311 312 bool grayscale = path_lower.find("grayscale=true") != std::string::npos; 313 314 SetData(request_id, callback, extension, grayscale, size, match_type); 315 316 return true; 317 } 318 319 void ExtensionIconSource::SetData( 320 int request_id, 321 const content::URLDataSource::GotDataCallback& callback, 322 const Extension* extension, 323 bool grayscale, 324 int size, 325 ExtensionIconSet::MatchType match) { 326 ExtensionIconRequest* request = new ExtensionIconRequest(); 327 request->callback = callback; 328 request->extension = extension; 329 request->grayscale = grayscale; 330 request->size = size; 331 request->match = match; 332 request_map_[request_id] = request; 333 } 334 335 ExtensionIconSource::ExtensionIconRequest* ExtensionIconSource::GetData( 336 int request_id) { 337 return request_map_[request_id]; 338 } 339 340 void ExtensionIconSource::ClearData(int request_id) { 341 std::map<int, ExtensionIconRequest*>::iterator i = 342 request_map_.find(request_id); 343 if (i == request_map_.end()) 344 return; 345 346 delete i->second; 347 request_map_.erase(i); 348 } 349 350 } // namespace extensions 351
