1// Copyright (c) 2011 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 <gdk-pixbuf/gdk-pixbuf.h>
8#include <gio/gio.h>
9#include <gtk/gtk.h>
10
11#include "base/file_util.h"
12#include "base/logging.h"
13#include "base/message_loop.h"
14#include "base/mime_util.h"
15#include "base/threading/thread.h"
16#include "base/string_util.h"
17
18static int SizeToInt(IconLoader::IconSize size) {
19  int pixels = 48;
20  if (size == IconLoader::NORMAL)
21    pixels = 32;
22  else if (size == IconLoader::SMALL)
23    pixels = 16;
24
25  return pixels;
26}
27
28void IconLoader::ReadIcon() {
29  filename_ = mime_util::GetMimeIcon(group_, SizeToInt(icon_size_));
30  file_util::ReadFileToString(filename_, &icon_data_);
31  target_message_loop_->PostTask(FROM_HERE,
32      NewRunnableMethod(this, &IconLoader::ParseIcon));
33}
34
35void IconLoader::ParseIcon() {
36  int size = SizeToInt(icon_size_);
37
38  // It would be more convenient to use gdk_pixbuf_new_from_stream_at_scale
39  // but that is only available after 2.14.
40  GdkPixbufLoader* loader = gdk_pixbuf_loader_new();
41  gdk_pixbuf_loader_set_size(loader, size, size);
42  gdk_pixbuf_loader_write(loader,
43                          reinterpret_cast<const guchar*>(icon_data_.data()),
44                          icon_data_.length(), NULL);
45  gdk_pixbuf_loader_close(loader, NULL);
46  // At this point, the pixbuf is owned by the loader.
47  GdkPixbuf* pixbuf = gdk_pixbuf_loader_get_pixbuf(loader);
48
49  if (pixbuf) {
50    DCHECK_EQ(size, gdk_pixbuf_get_width(pixbuf));
51    DCHECK_EQ(size, gdk_pixbuf_get_height(pixbuf));
52    // Takes ownership of |pixbuf|.
53    g_object_ref(pixbuf);
54    image_.reset(new gfx::Image(pixbuf));
55  } else {
56    LOG(WARNING) << "Unsupported file type or load error: " <<
57                    filename_.value();
58  }
59
60  g_object_unref(loader);
61
62  NotifyDelegate();
63}
64