Refactor FileVersionInfo into an interface with platform implementations.

base/file_version_info_mac.h

+// Copyright (c) 2006-2008 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 BASE_FILE_VERSION_INFO_MAC_H_
+#define BASE_FILE_VERSION_INFO_MAC_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/file_version_info.h"
+#include "base/scoped_ptr.h"
+
+#ifdef __OBJC__
+@class NSBundle;
+#else
+class NSBundle;
+#endif
+
+class FilePath;
+
+// Provides a way to access the version information for a file.
+// This is the information you access when you select a file in the Windows
+// explorer, right-click select Properties, then click the Version tab.
+
+class FileVersionInfoMac : public FileVersionInfo {
+ public:
+  explicit FileVersionInfoMac(NSBundle *bundle);
+  ~FileVersionInfoMac();
+
+  // Accessors to the different version properties.
+  // Returns an empty string if the property is not found.
+  virtual std::wstring company_name();
+  virtual std::wstring company_short_name();
+  virtual std::wstring product_name();
+  virtual std::wstring product_short_name();
+  virtual std::wstring internal_name();
+  virtual std::wstring product_version();
+  virtual std::wstring private_build();
+  virtual std::wstring special_build();
+  virtual std::wstring comments();
+  virtual std::wstring original_filename();
+  virtual std::wstring file_description();
+  virtual std::wstring file_version();
+  virtual std::wstring legal_copyright();
+  virtual std::wstring legal_trademarks();
+  virtual std::wstring last_change();
+  virtual bool is_official_build();
+
+ private:
+  // Lets you access other properties not covered above.
+  bool GetValue(const wchar_t* name, std::wstring* value);
+
+  // Similar to GetValue but returns a wstring (empty string if the property
+  // does not exist).
+  std::wstring GetStringValue(const wchar_t* name);
+
+  NSBundle *bundle_;
+
+  DISALLOW_COPY_AND_ASSIGN(FileVersionInfoMac);
+};
+
+#endif  // BASE_FILE_VERSION_INFO_MAC_H_