src/include/wrapper/cef_scoped_temp_dir.h

// Copyright (c) 2016 Marshall A. Greenblatt. Portions copyright (c) 2011
// Google Inc. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//    * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//    * Redistributions in binary form must reproduce the above
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// in the documentation and/or other materials provided with the
// distribution.
//    * Neither the name of Google Inc. nor the name Chromium Embedded
// Framework nor the names of its contributors may be used to endorse
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// ---------------------------------------------------------------------------
//
// The contents of this file are only available to applications that link
// against the libcef_dll_wrapper target.
//

#ifndef CEF_INCLUDE_SCOPED_TEMP_DIR_H_
#define CEF_INCLUDE_SCOPED_TEMP_DIR_H_
#pragma once

#include "include/base/cef_build.h"
#include "include/base/cef_macros.h"
#include "include/cef_base.h"

///
// An object representing a temporary / scratch directory that should be cleaned
// up (recursively) when this object goes out of scope.  Note that since
// deletion occurs during the destructor, no further error handling is possible
// if the directory fails to be deleted.  As a result, deletion is not
// guaranteed by this class.
//
// Multiple calls to the methods which establish a temporary directory
// (CreateUniqueTempDir, CreateUniqueTempDirUnderPath, and Set) must have
// intervening calls to Delete or Take, or the calls will fail.
///
class CefScopedTempDir {
 public:
  ///
  // No directory is owned/created initially.
  ///
  CefScopedTempDir();

  ///
  // Recursively delete path.
  ///
  ~CefScopedTempDir();

  ///
  // Creates a unique directory in TempPath, and takes ownership of it.
  // See file_util::CreateNewTemporaryDirectory.
  ///
  bool CreateUniqueTempDir() WARN_UNUSED_RESULT;

  ///
  // Creates a unique directory under a given path, and takes ownership of it.
  ///
  bool CreateUniqueTempDirUnderPath(const CefString& path) WARN_UNUSED_RESULT;

  ///
  // Takes ownership of directory at |path|, creating it if necessary.
  // Don't call multiple times unless Take() has been called first.
  ///
  bool Set(const CefString& path) WARN_UNUSED_RESULT;

  ///
  // Deletes the temporary directory wrapped by this object.
  ///
  bool Delete() WARN_UNUSED_RESULT;

  ///
  // Caller takes ownership of the temporary directory so it won't be destroyed
  // when this object goes out of scope.
  ///
  CefString Take();

  ///
  // Returns the path to the created directory. Call one of the
  // CreateUniqueTempDir* methods before getting the path.
  ///
  const CefString& GetPath() const;

  ///
  // Returns true if path_ is empty.
  ///
  bool IsEmpty() const;

  ///
  // Returns true if path_ is non-empty and exists.
  ///
  bool IsValid() const;

 private:
  CefString path_;

  DISALLOW_COPY_AND_ASSIGN(CefScopedTempDir);
};

#endif  // CEF_INCLUDE_SCOPED_TEMP_DIR_H_