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.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
+
+using System;
+
+namespace PdfSharpCore.Pdf
+{
+    /// <summary>
+    /// This class is intended for empira internal use only and may change or drop in future releases.
+    /// </summary>
+    public class PdfCustomValues : PdfDictionary
+    {
+        internal PdfCustomValues()
+        { }
+
+        internal PdfCustomValues(PdfDocument document)
+            : base(document)
+        { }
+
+        internal PdfCustomValues(PdfDictionary dict)
+            : base(dict)
+        { }
+
+        /// <summary>
+        /// This function is intended for empira internal use only.
+        /// </summary>
+        public PdfCustomValueCompressionMode CompressionMode
+        {
+            set { throw new NotImplementedException(); }
+        }
+
+        /// <summary>
+        /// This function is intended for empira internal use only.
+        /// </summary>
+        public bool Contains(string key)
+        {
+            return Elements.ContainsKey(key);
+        }
+
+        /// <summary>
+        /// This function is intended for empira internal use only.
+        /// </summary>
+        public PdfCustomValue this[string key]
+        {
+            get
+            {
+                PdfDictionary dict = Elements.GetDictionary(key);
+                if (dict == null)
+                    return null;
+                PdfCustomValue cust = dict as PdfCustomValue;
+                if (cust == null)
+                    cust = new PdfCustomValue(dict);
+                return cust;
+            }
+            set
+            {
+                if (value == null)
+                {
+                    Elements.Remove(key);
+                }
+                else
+                {
+                    Owner.Internals.AddObject(value);
+                    Elements.SetReference(key, value);
+                }
+            }
+#if old
+            get
+            {
+                PdfDictionary dict = Elements.GetDictionary(key);
+                if (dict == null)
+                    return null;
+                if (!(dict is PdfCustomValue))
+                    dict = new PdfCustomValue(dict);
+                return dict.Stream.Value;
+            }
+            set
+            {
+                PdfCustomValue cust;
+                PdfDictionary dict = Elements.GetDictionary(key);
+                if (dict == null)
+                {
+                    cust = new PdfCustomValue();
+                    Owner.Internals.AddObject(cust);
+                    Elements.Add(key, cust);
+                }
+                else
+                {
+                    cust = dict as PdfCustomValue;
+                    if (cust == null)
+                        cust = new PdfCustomValue(dict);
+                }
+                cust.Value = value;
+            }
+#endif
+        }
+
+        /// <summary>
+        /// This function is intended for empira internal use only.
+        /// </summary>
+        public static void ClearAllCustomValues(PdfDocument document)
+        {
+            document.CustomValues = null;
+            foreach (PdfPage page in document.Pages)
+                page.CustomValues = null;
+        }
+
+        //public static string Key = "/PdfSharpCore.CustomValue";
+
+        internal static PdfCustomValues Get(DictionaryElements elem)
+        {
+            string key = elem.Owner.Owner.Internals.CustomValueKey;
+            PdfCustomValues customValues;
+            PdfDictionary dict = elem.GetDictionary(key);
+            if (dict == null)
+            {
+                customValues = new PdfCustomValues();
+                elem.Owner.Owner.Internals.AddObject(customValues);
+                elem.Add(key, customValues);
+            }
+            else
+            {
+                customValues = dict as PdfCustomValues;
+                if (customValues == null)
+                    customValues = new PdfCustomValues(dict);
+            }
+            return customValues;
+        }
+
+        internal static void Remove(DictionaryElements elem)
+        {
+            elem.Remove(elem.Owner.Owner.Internals.CustomValueKey);
+        }
+    }
+}