pdfdocumentopenmode.cs

用C#實現能產生PDF格式文件的源碼

#region PDFsharp - A .NET library for processing PDF
//
// Authors:
//   Stefan Lange (mailto:[e-mail])
//
// Copyright (c) 2005-2007 empira Software GmbH, Cologne (Germany)
//
// http://www.pdfsharp.com
// http://sourceforge.net/projects/pdfsharp
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
// DEALINGS IN THE SOFTWARE.
#endregion

namespace PdfSharp.Pdf.IO
{
  /// <summary>
  /// Determines how a PDF document is opened. 
  /// </summary>
  public enum PdfDocumentOpenMode
  {
    /// <summary>
    /// The PDF stream is completely read into memory and can be modified. Pages can be deleted or
    /// inserted, but it is not possible to extract pages. This mode is useful for modifying an
    /// existing PDF document.
    /// </summary>
    Modify,

    /// <summary>
    /// The PDF stream is opened for importing pages from it. A document opened in this mode cannot
    /// be modified.
    /// </summary>
    Import,

    /// <summary>
    /// The PDF stream is completely read into memory, but cannot be modified. This mode preserves the
    /// original internal structure of the document and is useful for analysing existing PDF files.
    /// </summary>
    ReadOnly,

    /// <summary>
    /// The PDF stream is partially read for information purposes only. The only valid operation is to
    /// call the Info property at the imported document. This option is very fast and needs less memory
    /// and is e.g. useful for browsing information about a collection of PDF documents in a user interface.
    /// </summary>
    InformationOnly,  // TODO: not yet implemented
  }
}