vendor: import KillerPDF 1.7.5 source (GPL-3.0) as the base for MMD PDF

2026-08-27 06:58:22 +02:00
commit 532485a830
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+#region PDFsharp - A .NET library for processing PDF
+//
+// Authors:
+//   Stefan Lange
+//
+// Copyright (c) 2005-2016 empira Software GmbH, Cologne Area (Germany)
+//
+// http://www.PdfSharpCore.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
+
+using System;
+
+namespace PdfSharpCore.Pdf.Security
+{
+    /// <summary>
+    /// Encapsulates access to the security settings of a PDF document.
+    /// </summary>
+    public sealed class PdfSecuritySettings
+    {
+        internal PdfSecuritySettings(PdfDocument document)
+        {
+            _document = document;
+        }
+        readonly PdfDocument _document;
+
+        /// <summary>
+        /// Indicates whether the granted access to the document is 'owner permission'. Returns true if the document 
+        /// is unprotected or was opened with the owner password. Returns false if the document was opened with the
+        /// user password.
+        /// </summary>
+        public bool HasOwnerPermissions
+        {
+            get { return _hasOwnerPermissions; }
+        }
+        internal bool _hasOwnerPermissions = true;
+
+        /// <summary>
+        /// Gets or sets the document security level. If you set the security level to anything but PdfDocumentSecurityLevel.None
+        /// you must also set a user and/or an owner password. Otherwise saving the document will fail.
+        /// </summary>
+        public PdfDocumentSecurityLevel DocumentSecurityLevel
+        {
+            get { return _documentSecurityLevel; }
+            set { _documentSecurityLevel = value; }
+        }
+        PdfDocumentSecurityLevel _documentSecurityLevel;
+
+        /// <summary>
+        /// Sets the user password of the document. Setting a password automatically sets the
+        /// PdfDocumentSecurityLevel to PdfDocumentSecurityLevel.Encrypted128Bit if its current
+        /// value is PdfDocumentSecurityLevel.None.
+        /// </summary>
+        public string UserPassword
+        {
+            set { SecurityHandler.UserPassword = value; }
+        }
+
+        /// <summary>
+        /// Sets the owner password of the document. Setting a password automatically sets the
+        /// PdfDocumentSecurityLevel to PdfDocumentSecurityLevel.Encrypted128Bit if its current
+        /// value is PdfDocumentSecurityLevel.None.
+        /// </summary>
+        public string OwnerPassword
+        {
+            set { SecurityHandler.OwnerPassword = value; }
+        }
+
+        /// <summary>
+        /// Determines whether the document can be saved.
+        /// </summary>
+        internal bool CanSave(ref string message)
+        {
+            if (_documentSecurityLevel != PdfDocumentSecurityLevel.None)
+            {
+                if (String.IsNullOrEmpty(SecurityHandler._userPassword) && String.IsNullOrEmpty(SecurityHandler._ownerPassword))
+                {
+                    message = PSSR.UserOrOwnerPasswordRequired;
+                    return false;
+                }
+            }
+            return true;
+        }
+
+        #region Permissions
+        //TODO: Use documentation from our English Acrobat 6.0 version.
+
+        /// <summary>
+        /// Permits printing the document. Should be used in conjunction with PermitFullQualityPrint.
+        /// </summary>
+        public bool PermitPrint
+        {
+            get { return (SecurityHandler.Permission & PdfUserAccessPermission.PermitPrint) != 0; }
+            set
+            {
+                PdfUserAccessPermission permission = SecurityHandler.Permission;
+                if (value)
+                    permission |= PdfUserAccessPermission.PermitPrint;
+                else
+                    permission &= ~PdfUserAccessPermission.PermitPrint;
+                SecurityHandler.Permission = permission;
+            }
+        }
+
+        /// <summary>
+        /// Permits modifying the document.
+        /// </summary>
+        public bool PermitModifyDocument
+        {
+            get { return (SecurityHandler.Permission & PdfUserAccessPermission.PermitModifyDocument) != 0; }
+            set
+            {
+                PdfUserAccessPermission permission = SecurityHandler.Permission;
+                if (value)
+                    permission |= PdfUserAccessPermission.PermitModifyDocument;
+                else
+                    permission &= ~PdfUserAccessPermission.PermitModifyDocument;
+                SecurityHandler.Permission = permission;
+            }
+        }
+
+        /// <summary>
+        /// Permits content copying or extraction.
+        /// </summary>
+        public bool PermitExtractContent
+        {
+            get { return (SecurityHandler.Permission & PdfUserAccessPermission.PermitExtractContent) != 0; }
+            set
+            {
+                PdfUserAccessPermission permission = SecurityHandler.Permission;
+                if (value)
+                    permission |= PdfUserAccessPermission.PermitExtractContent;
+                else
+                    permission &= ~PdfUserAccessPermission.PermitExtractContent;
+                SecurityHandler.Permission = permission;
+            }
+        }
+
+        /// <summary>
+        /// Permits commenting the document.
+        /// </summary>
+        public bool PermitAnnotations
+        {
+            get { return (SecurityHandler.Permission & PdfUserAccessPermission.PermitAnnotations) != 0; }
+            set
+            {
+                PdfUserAccessPermission permission = SecurityHandler.Permission;
+                if (value)
+                    permission |= PdfUserAccessPermission.PermitAnnotations;
+                else
+                    permission &= ~PdfUserAccessPermission.PermitAnnotations;
+                SecurityHandler.Permission = permission;
+            }
+        }
+
+        /// <summary>
+        /// Permits filling of form fields.
+        /// </summary>
+        public bool PermitFormsFill
+        {
+            get { return (SecurityHandler.Permission & PdfUserAccessPermission.PermitFormsFill) != 0; }
+            set
+            {
+                PdfUserAccessPermission permission = SecurityHandler.Permission;
+                if (value)
+                    permission |= PdfUserAccessPermission.PermitFormsFill;
+                else
+                    permission &= ~PdfUserAccessPermission.PermitFormsFill;
+                SecurityHandler.Permission = permission;
+            }
+        }
+
+        /// <summary>
+        /// Permits content extraction for accessibility.
+        /// </summary>
+        public bool PermitAccessibilityExtractContent
+        {
+            get { return (SecurityHandler.Permission & PdfUserAccessPermission.PermitAccessibilityExtractContent) != 0; }
+            set
+            {
+                PdfUserAccessPermission permission = SecurityHandler.Permission;
+                if (value)
+                    permission |= PdfUserAccessPermission.PermitAccessibilityExtractContent;
+                else
+                    permission &= ~PdfUserAccessPermission.PermitAccessibilityExtractContent;
+                SecurityHandler.Permission = permission;
+            }
+        }
+
+        /// <summary>
+        /// Permits to insert, rotate, or delete pages and create bookmarks or thumbnail images even if
+        /// PermitModifyDocument is not set.
+        /// </summary>
+        public bool PermitAssembleDocument
+        {
+            get { return (SecurityHandler.Permission & PdfUserAccessPermission.PermitAssembleDocument) != 0; }
+            set
+            {
+                PdfUserAccessPermission permission = SecurityHandler.Permission;
+                if (value)
+                    permission |= PdfUserAccessPermission.PermitAssembleDocument;
+                else
+                    permission &= ~PdfUserAccessPermission.PermitAssembleDocument;
+                SecurityHandler.Permission = permission;
+            }
+        }
+
+        /// <summary>
+        /// Permits to print in high quality. insert, rotate, or delete pages and create bookmarks or thumbnail images
+        /// even if PermitModifyDocument is not set.
+        /// </summary>
+        public bool PermitFullQualityPrint
+        {
+            get { return (SecurityHandler.Permission & PdfUserAccessPermission.PermitFullQualityPrint) != 0; }
+            set
+            {
+                PdfUserAccessPermission permission = SecurityHandler.Permission;
+                if (value)
+                    permission |= PdfUserAccessPermission.PermitFullQualityPrint;
+                else
+                    permission &= ~PdfUserAccessPermission.PermitFullQualityPrint;
+                SecurityHandler.Permission = permission;
+            }
+        }
+        #endregion
+
+        /// <summary>
+        /// PdfStandardSecurityHandler is the only implemented handler.
+        /// </summary>
+        internal PdfStandardSecurityHandler SecurityHandler
+        {
+            get { return _document._trailer.SecurityHandler; }
+        }
+    }
+}