chrome/browser/icon_loader_win.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 <windows.h>
   8 #include <shellapi.h>
   9
  10 #include "base/bind.h"
  11 #include "base/message_loop/message_loop.h"
  12 #include "base/threading/thread.h"
  13 #include "third_party/skia/include/core/SkBitmap.h"
  14 #include "ui/gfx/icon_util.h"
  15 #include "ui/gfx/image/image_skia.h"
  16 #include "ui/gfx/size.h"
  17 #include "ui/gfx/win/dpi.h"
  18
  19 // static
  20 IconGroupID IconLoader::ReadGroupIDFromFilepath(
  21     const base::FilePath& filepath) {
  22   if (!IsIconMutableFromFilepath(filepath))
  23     return filepath.Extension();
  24   return filepath.value();
  25 }
  26
  27 // static
  28 bool IconLoader::IsIconMutableFromFilepath(const base::FilePath& filepath) {
  29   return filepath.MatchesExtension(L".exe") ||
  30          filepath.MatchesExtension(L".dll") ||
  31          filepath.MatchesExtension(L".ico");
  32 }
  33
  34 // static
  35 content::BrowserThread::ID IconLoader::ReadIconThreadID() {
  36   return content::BrowserThread::FILE;
  37 }
  38
  39 void IconLoader::ReadIcon() {
  40   int size = 0;
  41   switch (icon_size_) {
  42     case IconLoader::SMALL:
  43       size = SHGFI_SMALLICON;
  44       break;
  45     case IconLoader::NORMAL:
  46       size = 0;
  47       break;
  48     case IconLoader::LARGE:
  49       size = SHGFI_LARGEICON;
  50       break;
  51     default:
  52       NOTREACHED();
  53   }
  54
  55   image_.reset();
  56
  57   SHFILEINFO file_info = { 0 };
  58   if (SHGetFileInfo(group_.c_str(), FILE_ATTRIBUTE_NORMAL, &file_info,
  59                      sizeof(SHFILEINFO),
  60                      SHGFI_ICON | size | SHGFI_USEFILEATTRIBUTES)) {
  61     scoped_ptr<SkBitmap> bitmap(IconUtil::CreateSkBitmapFromHICON(
  62         file_info.hIcon));
  63     if (bitmap.get()) {
  64       gfx::ImageSkia image_skia(gfx::ImageSkiaRep(
  65           *bitmap, gfx::win::GetDeviceScaleFactor()));
  66       image_skia.MakeThreadSafe();
  67       image_.reset(new gfx::Image(image_skia));
  68       DestroyIcon(file_info.hIcon);
  69     }
  70   }
  71
  72   // Always notify the delegate, regardless of success.
  73   target_message_loop_->PostTask(FROM_HERE,
  74       base::Bind(&IconLoader::NotifyDelegate, this));
  75 }