1 files changed, 45 insertions, 0 deletions
diff --git a/third_party/base/win/scoped_select_object.h b/third_party/base/win/scoped_select_object.h
new file mode 100644
index 000000000..89a5f1b91
--- /dev/null
+++ b/third_party/base/win/scoped_select_object.h
@@ -0,0 +1,45 @@
+// Copyright 2011 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.
+
+#ifndef THIRD_PARTY_BASE_WIN_SCOPED_SELECT_OBJECT_H_
+#define THIRD_PARTY_BASE_WIN_SCOPED_SELECT_OBJECT_H_
+
+#include <windows.h>
+
+#include "third_party/base/check.h"
+
+namespace pdfium {
+namespace base {
+namespace win {
+
+// Helper class for deselecting object from DC.
+class ScopedSelectObject {
+ public:
+  ScopedSelectObject(HDC hdc, HGDIOBJ object)
+      : hdc_(hdc), oldobj_(SelectObject(hdc, object)) {
+    DCHECK(hdc_);
+    DCHECK(object);
+    DCHECK(oldobj_);
+    DCHECK(oldobj_ != HGDI_ERROR);
+  }
+
+  ScopedSelectObject(const ScopedSelectObject&) = delete;
+  ScopedSelectObject& operator=(const ScopedSelectObject&) = delete;
+
+  ~ScopedSelectObject() {
+    [[maybe_unused]] HGDIOBJ object = SelectObject(hdc_, oldobj_);
+    DCHECK((GetObjectType(oldobj_) != OBJ_REGION && object) ||
+           (GetObjectType(oldobj_) == OBJ_REGION && object != HGDI_ERROR));
+  }
+
+ private:
+  const HDC hdc_;
+  const HGDIOBJ oldobj_;
+};
+
+}  // namespace win
+}  // namespace base
+}  // namespace pdfium
+
+#endif  // THIRD_PARTY_BASE_WIN_SCOPED_SELECT_OBJECT_H_