chrome/browser/icon_loader_chromeos.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/icon_loader.h"
   6
   7 #include <map>
   8 #include <string>
   9 #include <utility>
  10
  11 #include "base/bind.h"
  12 #include "base/files/file_path.h"
  13 #include "base/lazy_instance.h"
  14 #include "base/memory/ref_counted_memory.h"
  15 #include "base/message_loop/message_loop.h"
  16 #include "base/strings/string_util.h"
  17 #include "chrome/browser/icon_loader.h"
  18 #include "grit/theme_resources.h"
  19 #include "third_party/skia/include/core/SkBitmap.h"
  20 #include "ui/base/layout.h"
  21 #include "ui/base/resource/resource_bundle.h"
  22 #include "ui/gfx/canvas.h"
  23 #include "ui/gfx/codec/png_codec.h"
  24 #include "ui/gfx/image/image.h"
  25 #include "ui/gfx/image/image_skia.h"
  26 #include "ui/gfx/image/image_skia_operations.h"
  27
  28 namespace {
  29
  30 // Used with GenerateImageWithSize() to indicate that the image shouldn't be
  31 // resized.
  32 const int kDoNotResize = -1;
  33
  34 struct IdrBySize {
  35   int idr_small;
  36   int idr_normal;
  37   int idr_large;
  38 };
  39
  40 // Performs mapping of <file extension, icon size> to icon resource IDs.
  41 class IconMapper {
  42  public:
  43   IconMapper();
  44
  45   // Lookup icon resource ID for a given filename |extension| and
  46   // |icon_size|. Defaults to generic icons if there are no icons for the given
  47   // extension.
  48   int Lookup(const std::string& extension, IconLoader::IconSize icon_size);
  49
  50  private:
  51   typedef std::map<std::string, IdrBySize> ExtensionIconMap;
  52
  53   ExtensionIconMap extension_icon_map_;
  54 };
  55
  56 const IdrBySize kAudioIdrs = {
  57   IDR_FILE_MANAGER_IMG_FILETYPE_AUDIO,
  58   IDR_FILE_MANAGER_IMG_FILETYPE_LARGE_AUDIO,
  59   IDR_FILE_MANAGER_IMG_FILETYPE_LARGE_AUDIO
  60 };
  61 const IdrBySize kGenericIdrs = {
  62   IDR_FILE_MANAGER_IMG_FILETYPE_GENERIC,
  63   IDR_FILE_MANAGER_IMG_FILETYPE_LARGE_GENERIC,
  64   IDR_FILE_MANAGER_IMG_FILETYPE_LARGE_GENERIC
  65 };
  66 const IdrBySize kImageIdrs = {
  67   IDR_FILE_MANAGER_IMG_FILETYPE_IMAGE,
  68   IDR_FILE_MANAGER_IMG_FILETYPE_IMAGE,
  69   IDR_FILE_MANAGER_IMG_FILETYPE_IMAGE
  70 };
  71 #if defined(USE_PROPRIETARY_CODECS)
  72 const IdrBySize kPdfIdrs = {
  73   IDR_FILE_MANAGER_IMG_FILETYPE_PDF,
  74   IDR_FILE_MANAGER_IMG_FILETYPE_PDF,
  75   IDR_FILE_MANAGER_IMG_FILETYPE_PDF
  76 };
  77 #endif
  78 const IdrBySize kVideoIdrs = {
  79   IDR_FILE_MANAGER_IMG_FILETYPE_VIDEO,
  80   IDR_FILE_MANAGER_IMG_FILETYPE_LARGE_VIDEO,
  81   IDR_FILE_MANAGER_IMG_FILETYPE_LARGE_VIDEO
  82 };
  83
  84 IconMapper::IconMapper() {
  85   // The code below should match translation in
  86   // chrome/browser/resources/file_manager/js/file_manager.js
  87   // chrome/browser/resources/file_manager/css/file_manager.css
  88   // 'audio': /\.(mp3|m4a|oga|ogg|wav)$/i,
  89   // 'html': /\.(html?)$/i,
  90   // 'image': /\.(bmp|gif|jpe?g|ico|png|webp)$/i,
  91   // 'pdf' : /\.(pdf)$/i,
  92   // 'text': /\.(pod|rst|txt|log)$/i,
  93   // 'video': /\.(mov|mp4|m4v|mpe?g4?|ogm|ogv|ogx|webm)$/i
  94
  95   const ExtensionIconMap::value_type kExtensionIdrBySizeData[] = {
  96 #if defined(USE_PROPRIETARY_CODECS)
  97     std::make_pair(".m4a", kAudioIdrs),
  98     std::make_pair(".mp3", kAudioIdrs),
  99     std::make_pair(".pdf", kPdfIdrs),
 100     std::make_pair(".3gp", kVideoIdrs),
 101     std::make_pair(".avi", kVideoIdrs),
 102     std::make_pair(".m4v", kVideoIdrs),
 103     std::make_pair(".mov", kVideoIdrs),
 104     std::make_pair(".mp4", kVideoIdrs),
 105     std::make_pair(".mpeg", kVideoIdrs),
 106     std::make_pair(".mpg", kVideoIdrs),
 107     std::make_pair(".mpeg4", kVideoIdrs),
 108     std::make_pair(".mpg4", kVideoIdrs),
 109 #endif
 110     std::make_pair(".flac", kAudioIdrs),
 111     std::make_pair(".oga", kAudioIdrs),
 112     std::make_pair(".ogg", kAudioIdrs),
 113     std::make_pair(".wav", kAudioIdrs),
 114     std::make_pair(".bmp", kImageIdrs),
 115     std::make_pair(".gif", kImageIdrs),
 116     std::make_pair(".ico", kImageIdrs),
 117     std::make_pair(".jpeg", kImageIdrs),
 118     std::make_pair(".jpg", kImageIdrs),
 119     std::make_pair(".png", kImageIdrs),
 120     std::make_pair(".webp", kImageIdrs),
 121     std::make_pair(".ogm", kVideoIdrs),
 122     std::make_pair(".ogv", kVideoIdrs),
 123     std::make_pair(".ogx", kVideoIdrs),
 124     std::make_pair(".webm", kVideoIdrs),
 125   };
 126
 127   const size_t kESize = arraysize(kExtensionIdrBySizeData);
 128   ExtensionIconMap source(&kExtensionIdrBySizeData[0],
 129                           &kExtensionIdrBySizeData[kESize]);
 130   extension_icon_map_.swap(source);
 131 }
 132
 133 int IconMapper::Lookup(const std::string& extension,
 134                        IconLoader::IconSize icon_size) {
 135   DCHECK(icon_size == IconLoader::SMALL ||
 136          icon_size == IconLoader::NORMAL ||
 137          icon_size == IconLoader::LARGE);
 138   ExtensionIconMap::const_iterator it = extension_icon_map_.find(extension);
 139   const IdrBySize& idrbysize =
 140       ((it == extension_icon_map_.end()) ? kGenericIdrs : it->second);
 141   int idr = -1;
 142   switch (icon_size) {
 143     case IconLoader::SMALL:  idr = idrbysize.idr_small;  break;
 144     case IconLoader::NORMAL: idr = idrbysize.idr_normal; break;
 145     case IconLoader::LARGE:  idr = idrbysize.idr_large;  break;
 146     case IconLoader::ALL:
 147     default:
 148       NOTREACHED();
 149   }
 150   return idr;
 151 }
 152
 153 // Returns a copy of |source| that is |dip_size| in width and height. If
 154 // |dip_size| is |kDoNotResize|, returns an unmodified copy of |source|.
 155 // |source| must be a square image (width == height).
 156 gfx::ImageSkia ResizeImage(const gfx::ImageSkia& source, int dip_size) {
 157   DCHECK(!source.isNull());
 158   DCHECK(source.width() == source.height());
 159
 160   if (dip_size == kDoNotResize || source.width() == dip_size)
 161     return source;
 162
 163   return gfx::ImageSkiaOperations::CreateResizedImage(source,
 164       skia::ImageOperations::RESIZE_BEST, gfx::Size(dip_size, dip_size));
 165 }
 166
 167 int IconSizeToDIPSize(IconLoader::IconSize size) {
 168   switch (size) {
 169     case IconLoader::SMALL:  return 16;
 170     case IconLoader::NORMAL: return 32;
 171     case IconLoader::LARGE:  // fallthrough
 172       // On ChromeOS, we consider LARGE to mean "the largest image we have."
 173       // Since we have already chosen the largest applicable image resource, we
 174       // return the image as-is.
 175     case IconLoader::ALL:    // fallthrough
 176     default:
 177       return kDoNotResize;
 178   }
 179 }
 180
 181 }  // namespace
 182
 183 // static
 184 IconGroupID IconLoader::ReadGroupIDFromFilepath(
 185     const base::FilePath& filepath) {
 186   return StringToLowerASCII(filepath.Extension());
 187 }
 188
 189 bool IconLoader::IsIconMutableFromFilepath(const base::FilePath&) {
 190   return false;
 191 }
 192
 193 void IconLoader::ReadIcon() {
 194   static base::LazyInstance<IconMapper>::Leaky icon_mapper =
 195       LAZY_INSTANCE_INITIALIZER;
 196   int idr = icon_mapper.Get().Lookup(group_, icon_size_);
 197   ResourceBundle& rb = ResourceBundle::GetSharedInstance();
 198   gfx::ImageSkia image_skia(ResizeImage(*(rb.GetImageNamed(idr)).ToImageSkia(),
 199                                         IconSizeToDIPSize(icon_size_)));
 200   image_skia.MakeThreadSafe();
 201   image_.reset(new gfx::Image(image_skia));
 202   target_message_loop_->PostTask(
 203       FROM_HERE, base::Bind(&IconLoader::NotifyDelegate, this));
 204 }