#24 add missing marked content operators, still 2 to go

2025-10-14 19:05:01 +08:00 · 2019-01-06 11:34:25 +00:00
parent 16b0260d68
commit 406f0e6184
2 changed files with 131 additions and 0 deletions
--- a/src/UglyToad.PdfPig/Graphics/Operations/MarkedContent/DesignateMarkedContentPoint.cs
+++ b/src/UglyToad.PdfPig/Graphics/Operations/MarkedContent/DesignateMarkedContentPoint.cs
@@ -0,0 +1,128 @@
+namespace UglyToad.PdfPig.Graphics.Operations.MarkedContent
+{
+    using System.IO;
+    using Tokens;
+    using Writer;
+
+    /// <inheritdoc />
+    /// <summary>
+    /// Designate a single marked-content point in the content stream.
+    /// </summary>
+    public class DesignateMarkedContentPoint : IGraphicsStateOperation
+    {
+        /// <summary>
+        /// The symbol for this operation in a stream.
+        /// </summary>
+        public const string Symbol = "MP";
+
+        /// <inheritdoc />
+        public string Operator => Symbol;
+
+        /// <summary>
+        /// A name indicating the role or significance of the point.
+        /// </summary>
+        public NameToken Name { get; }
+
+        /// <summary>
+        /// Create a new <see cref="DesignateMarkedContentPoint"/>.
+        /// </summary>
+        /// <param name="name">The name of the marked-content point.</param>
+        public DesignateMarkedContentPoint(NameToken name)
+        {
+            Name = name;
+        }
+
+        /// <inheritdoc />
+        public void Run(IOperationContext operationContext)
+        {
+        }
+
+        /// <inheritdoc />
+        public void Write(Stream stream)
+        {
+            TokenWriter.WriteToken(Name, stream);
+            stream.WriteWhiteSpace();
+            stream.WriteText(Symbol);
+            stream.WriteNewLine();
+        }
+    }
+
+    /// <inheritdoc />
+    /// <summary>
+    /// Begin a marked-content sequence terminated by a balancing EMC operator.
+    /// </summary>
+    public class BeginMarkedContent : IGraphicsStateOperation
+    {
+        /// <summary>
+        /// The symbol for this operation in a stream.
+        /// </summary>
+        public const string Symbol = "BMC";
+
+        /// <inheritdoc />
+        public string Operator => Symbol;
+
+        /// <summary>
+        /// A name indicating the role or significance of the sequence.
+        /// </summary>
+        public NameToken Name { get; }
+
+        /// <summary>
+        /// Create a new <see cref="BeginMarkedContent"/>.
+        /// </summary>
+        /// <param name="name">The name of the marked-content sequence.</param>
+        public BeginMarkedContent(NameToken name)
+        {
+            Name = name;
+        }
+
+        /// <inheritdoc />
+        public void Run(IOperationContext operationContext)
+        {
+        }
+
+        /// <inheritdoc />
+        public void Write(Stream stream)
+        {
+            TokenWriter.WriteToken(Name, stream);
+            stream.WriteWhiteSpace();
+            stream.WriteText(Symbol);
+            stream.WriteNewLine();
+        }
+    }
+
+    /// <inheritdoc />
+    /// <summary>
+    /// End a marked-content sequence.
+    /// </summary>
+    public class EndMarkedContent : IGraphicsStateOperation
+    {
+        /// <summary>
+        /// The symbol for this operation in a stream.
+        /// </summary>
+        public const string Symbol = "EMC";
+
+        /// <summary>
+        /// The instance of the <see cref="EndMarkedContent"/> operation.
+        /// </summary>
+        public static readonly EndMarkedContent Value = new EndMarkedContent();
+
+        /// <inheritdoc />
+        public string Operator => Symbol;
+        
+        private EndMarkedContent()
+        {
+        }
+
+        /// <inheritdoc />
+        public void Run(IOperationContext operationContext)
+        {
+        }
+
+        /// <inheritdoc />
+        public void Write(Stream stream)
+        {
+            stream.WriteText(Symbol);
+            stream.WriteNewLine();
+        }
+    }
+}