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.Diagnostics;
+using PdfSharpCore.Pdf.IO;
+using PdfSharpCore.Pdf.Internal;
+
+namespace PdfSharpCore.Pdf
+{
+    /// <summary>
+    /// Represents an indirect text string value. This type is not used by PdfSharpCore. If it is imported from
+    /// an external PDF file, the value is converted into a direct object.
+    /// </summary>
+    [DebuggerDisplay("({Value})")]
+    public sealed class PdfStringObject : PdfObject
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PdfStringObject"/> class.
+        /// </summary>
+        public PdfStringObject()
+        {
+            _flags = PdfStringFlags.RawEncoding;
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PdfStringObject"/> class.
+        /// </summary>
+        /// <param name="document">The document.</param>
+        /// <param name="value">The value.</param>
+        public PdfStringObject(PdfDocument document, string value)
+            : base(document)
+        {
+            _value = value;
+            _flags = PdfStringFlags.RawEncoding;
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PdfStringObject"/> class.
+        /// </summary>
+        /// <param name="value">The value.</param>
+        /// <param name="encoding">The encoding.</param>
+        public PdfStringObject(string value, PdfStringEncoding encoding)
+        {
+            _value = value;
+            //if ((flags & PdfStringFlags.EncodingMask) == 0)
+            //  flags |= PdfStringFlags.PDFDocEncoding;
+            _flags = (PdfStringFlags)encoding;
+        }
+
+        internal PdfStringObject(string value, PdfStringFlags flags)
+        {
+            _value = value;
+            //if ((flags & PdfStringFlags.EncodingMask) == 0)
+            //  flags |= PdfStringFlags.PDFDocEncoding;
+            _flags = flags;
+        }
+
+        /// <summary>
+        /// Gets the number of characters in this string.
+        /// </summary>
+        public int Length
+        {
+            get { return _value == null ? 0 : _value.Length; }
+        }
+
+        /// <summary>
+        /// Gets or sets the encoding.
+        /// </summary>
+        public PdfStringEncoding Encoding
+        {
+            get { return (PdfStringEncoding)(_flags & PdfStringFlags.EncodingMask); }
+            set { _flags = (_flags & ~PdfStringFlags.EncodingMask) | ((PdfStringFlags)value & PdfStringFlags.EncodingMask); }
+        }
+
+        /// <summary>
+        /// Gets a value indicating whether the string is a hexadecimal literal.
+        /// </summary>
+        public bool HexLiteral
+        {
+            get { return (_flags & PdfStringFlags.HexLiteral) != 0; }
+            set { _flags = value ? _flags | PdfStringFlags.HexLiteral : _flags & ~PdfStringFlags.HexLiteral; }
+        }
+        PdfStringFlags _flags;
+
+        /// <summary>
+        /// Gets or sets the value as string
+        /// </summary>
+        public string Value
+        {
+            get { return _value ?? ""; }
+            set { _value = value ?? ""; }
+        }
+        string _value;
+
+        /// <summary>
+        /// Gets or sets the string value for encryption purposes.
+        /// </summary>
+        internal byte[] EncryptionValue
+        {
+            // TODO: Unicode case is not handled!
+            get { return _value == null ? new byte[0] : PdfEncoders.RawEncoding.GetBytes(_value); }
+            set { _value = PdfEncoders.RawEncoding.GetString(value, 0, value.Length); }
+        }
+
+        /// <summary>
+        /// Returns the string.
+        /// </summary>
+        public override string ToString()
+        {
+            return _value;
+        }
+
+        /// <summary>
+        /// Writes the string literal with encoding DOCEncoded.
+        /// </summary>
+        internal override void WriteObject(PdfWriter writer)
+        {
+            writer.WriteBeginObject(this);
+            writer.Write(new PdfString(_value, _flags));
+            writer.WriteEndObject();
+        }
+    }
+}