Windows icon loader refactor in preparation for port.

Review URL: http://codereview.chromium.org/115056

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@15577 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 80 insertions, 0 deletions

diff --git a/chrome/browser/icon_loader_win.cc b/chrome/browser/icon_loader_win.cc
new file mode 100644
index 0000000..998faf1
--- /dev/null
+++ b/chrome/browser/icon_loader_win.cc
@@ -0,0 +1,80 @@
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/icon_loader_win.h"
+
+#include <windows.h>
+#include <shellapi.h>
+
+#include "app/gfx/icon_util.h"
+#include "base/gfx/size.h"
+#include "base/message_loop.h"
+#include "base/thread.h"
+#include "chrome/browser/browser_process.h"
+#include "skia/include/SkBitmap.h"
+
+IconLoader* IconLoader::Create(const FilePath& path, IconSize size,
+                               Delegate* delegate) {
+  return new IconLoaderWin(path, size, delegate);
+}
+
+IconLoaderWin::IconLoaderWin(const FilePath& path, IconSize size,
+                             Delegate* delegate)
+    : path_(path),
+      icon_size_(size),
+      bitmap_(NULL),
+      delegate_(delegate) {
+}
+
+IconLoaderWin::~IconLoaderWin() {
+  delete bitmap_;
+}
+
+void IconLoaderWin::Start() {
+  target_message_loop_ = MessageLoop::current();
+
+  g_browser_process->file_thread()->message_loop()->PostTask(FROM_HERE,
+      NewRunnableMethod(this, &IconLoaderWin::ReadIcon));
+}
+
+void IconLoaderWin::ReadIcon() {
+  int size = 0;
+  switch (icon_size_) {
+    case IconLoader::SMALL:
+      size = SHGFI_SMALLICON;
+      break;
+    case IconLoader::NORMAL:
+      size = 0;
+      break;
+    case IconLoader::LARGE:
+      size = SHGFI_LARGEICON;
+      break;
+    default:
+      NOTREACHED();
+  }
+  SHFILEINFO file_info = { 0 };
+  if (!SHGetFileInfo(path_.value().c_str(), FILE_ATTRIBUTE_NORMAL, &file_info,
+                     sizeof(SHFILEINFO),
+                     SHGFI_ICON | size | SHGFI_USEFILEATTRIBUTES))
+    return;
+
+  ICONINFO icon_info = { 0 };
+  BITMAP bitmap_info = { 0 };
+
+  BOOL r = ::GetIconInfo(file_info.hIcon, &icon_info);
+  DCHECK(r);
+  r = ::GetObject(icon_info.hbmMask, sizeof(bitmap_info), &bitmap_info);
+  DCHECK(r);
+
+  gfx::Size icon_size(bitmap_info.bmWidth, bitmap_info.bmHeight);
+  bitmap_ = IconUtil::CreateSkBitmapFromHICON(file_info.hIcon, icon_size);
+
+  target_message_loop_->PostTask(FROM_HERE,
+      NewRunnableMethod(this, &IconLoaderWin::NotifyDelegate));
+}
+
+void IconLoaderWin::NotifyDelegate() {
+  delegate_->OnBitmapLoaded(this, bitmap_);
+  bitmap_ = NULL;
+}