chrome/browser/icon_loader_mac.mm

   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 #import <AppKit/AppKit.h>
   8
   9 #include "base/bind.h"
  10 #include "base/files/file_path.h"
  11 #include "base/strings/sys_string_conversions.h"
  12 #include "base/task/thread_pool.h"
  13 #include "base/threading/thread.h"
  14 #include "ui/gfx/image/image_skia.h"
  15 #include "ui/gfx/image/image_skia_util_mac.h"
  16
  17 // static
  18 IconLoader::IconGroup IconLoader::GroupForFilepath(
  19     const base::FilePath& file_path) {
  20   return file_path.Extension();
  21 }
  22
  23 // static
  24 scoped_refptr<base::TaskRunner> IconLoader::GetReadIconTaskRunner() {
  25   // NSWorkspace is thread-safe.
  26   return base::ThreadPool::CreateTaskRunner(traits());
  27 }
  28
  29 void IconLoader::ReadIcon() {
  30   NSString* group = base::SysUTF8ToNSString(group_);
  31   NSWorkspace* workspace = [NSWorkspace sharedWorkspace];
  32   NSImage* icon = [workspace iconForFileType:group];
  33
  34   gfx::Image image;
  35
  36   if (icon_size_ == ALL) {
  37     // The NSImage already has all sizes.
  38     image = gfx::Image(icon);
  39   } else {
  40     NSSize size = NSZeroSize;
  41     switch (icon_size_) {
  42       case IconLoader::SMALL:
  43         size = NSMakeSize(16, 16);
  44         break;
  45       case IconLoader::NORMAL:
  46         size = NSMakeSize(32, 32);
  47         break;
  48       default:
  49         NOTREACHED();
  50     }
  51     gfx::ImageSkia image_skia(gfx::ImageSkiaFromResizedNSImage(icon, size));
  52     if (!image_skia.isNull()) {
  53       image_skia.MakeThreadSafe();
  54       image = gfx::Image(image_skia);
  55     }
  56   }
  57
  58   target_task_runner_->PostTask(
  59       FROM_HERE,
  60       base::BindOnce(std::move(callback_), std::move(image), group_));
  61   delete this;
  62 }