chrome/browser/icon_loader_linux.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 <string>
   8
   9 #include "base/bind.h"
  10 #include "base/file_util.h"
  11 #include "base/logging.h"
  12 #include "base/message_loop/message_loop.h"
  13 #include "base/nix/mime_util_xdg.h"
  14 #include "third_party/skia/include/core/SkBitmap.h"
  15 #include "ui/gfx/codec/png_codec.h"
  16 #include "ui/gfx/image/image_skia.h"
  17 #include "ui/gfx/size.h"
  18
  19 using std::string;
  20
  21 // static
  22 IconGroupID IconLoader::ReadGroupIDFromFilepath(
  23     const base::FilePath& filepath) {
  24   return base::nix::GetFileMimeType(filepath);
  25 }
  26
  27 bool IconLoader::IsIconMutableFromFilepath(const base::FilePath&) {
  28   return false;
  29 }
  30
  31 void IconLoader::ReadIcon() {
  32   int size_pixels = 0;
  33   switch (icon_size_) {
  34     case IconLoader::SMALL:
  35       size_pixels = 16;
  36       break;
  37     case IconLoader::NORMAL:
  38       size_pixels = 32;
  39       break;
  40     case IconLoader::LARGE:
  41       size_pixels = 48;
  42       break;
  43     default:
  44       NOTREACHED();
  45   }
  46
  47   base::FilePath filename = base::nix::GetMimeIcon(group_, size_pixels);
  48   // We don't support SVG or XPM icons; this just spams the terminal so fail
  49   // quickly and don't try to read the file from disk first.
  50   if (filename.Extension() != ".svg" &&
  51       filename.Extension() != ".xpm") {
  52     string icon_data;
  53     base::ReadFileToString(filename, &icon_data);
  54
  55     SkBitmap bitmap;
  56     bool success = gfx::PNGCodec::Decode(
  57         reinterpret_cast<const unsigned char*>(icon_data.data()),
  58         icon_data.length(),
  59         &bitmap);
  60     if (success && !bitmap.empty()) {
  61       DCHECK_EQ(size_pixels, bitmap.width());
  62       DCHECK_EQ(size_pixels, bitmap.height());
  63       gfx::ImageSkia image_skia = gfx::ImageSkia::CreateFrom1xBitmap(bitmap);
  64       image_skia.MakeThreadSafe();
  65       image_.reset(new gfx::Image(image_skia));
  66     } else {
  67       LOG(WARNING) << "Unsupported file type or load error: "
  68                    << filename.value();
  69     }
  70   }
  71
  72   target_message_loop_->PostTask(
  73       FROM_HERE, base::Bind(&IconLoader::NotifyDelegate, this));
  74 }