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
+
+namespace PdfSharpCore.Pdf.Annotations
+{
+    /// <summary>
+    /// Represents a text annotation.
+    /// </summary>
+    internal sealed class PdfWidgetAnnotation : PdfAnnotation
+    {
+        public PdfWidgetAnnotation()
+        {
+            Initialize();
+        }
+
+        public PdfWidgetAnnotation(PdfDocument document)
+            : base(document)
+        {
+            Initialize();
+        }
+
+        void Initialize()
+        {
+            Elements.SetName(Keys.Subtype, "/Widget");
+        }
+
+        /// <summary>
+        /// Predefined keys of this dictionary.
+        /// </summary>
+        internal new class Keys : PdfAnnotation.Keys
+        {
+            /// <summary>
+            /// (Optional) The annotation’s highlighting mode, the visual effect to be used when
+            /// the mouse button is pressed or held down inside its active area:
+            ///   N (None) No highlighting.
+            ///   I (Invert) Invert the contents of the annotation rectangle.
+            ///   O (Outline) Invert the annotation’s border.
+            ///   P (Push) Display the annotation’s down appearance, if any. If no down appearance is defined,
+            ///     offset the contents of the annotation rectangle to appear as if it were being pushed below
+            ///     the surface of the page.
+            ///   T (Toggle) Same as P (which is preferred).
+            /// A highlighting mode other than P overrides any down appearance defined for the annotation. 
+            /// Default value: I.
+            /// </summary>
+            [KeyInfo(KeyType.Name | KeyType.Optional)]
+            public const string H = "/H";
+
+            /// <summary>
+            /// (Optional) An appearance characteristics dictionary to be used in constructing a dynamic 
+            /// appearance stream specifying the annotation’s visual presentation on the page.
+            /// The name MK for this entry is of historical significance only and has no direct meaning.
+            /// </summary>
+            [KeyInfo(KeyType.Dictionary | KeyType.Optional)]
+            public const string MK = "/MK";
+
+            public static DictionaryMeta Meta
+            {
+                get { return _meta ?? (_meta = CreateMeta(typeof(Keys))); }
+            }
+            static DictionaryMeta _meta;
+        }
+
+        /// <summary>
+        /// Gets the KeysMeta of this dictionary type.
+        /// </summary>
+        internal override DictionaryMeta Meta
+        {
+            get { return Keys.Meta; }
+        }
+    }
+}