rtf

RtfWriter.Standard/RtfAbstract.cs

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+namespace RtfWriter.Standard
+{
+    /// <summary>
+    /// Internal use only.
+    /// Objects that are renderable can emit RTF code.
+    /// </summary>
+    abstract public class RtfRenderable
+    {
+        /// <summary>
+        /// Internal use only.
+        /// Emit RTF code.
+        /// </summary>
+        /// <returns>RTF code</returns>
+        abstract public string render();
+    }
+
+    /// <summary>
+    /// Internal use only.
+    /// RtfBlock is a content block that cannot contain other blocks.
+    /// For example, an image is an RtfBlock because it cannot contain
+    /// other content block such as another image, a paragraph, a table,
+    /// etc.
+    /// </summary>
+    abstract public class RtfBlock : RtfRenderable
+    {
+        /// <summary>
+        /// How this block is aligned in its containing block.
+        /// </summary>
+        abstract public Align Alignment { get; set; }
+        /// <summary>
+        /// By what distance this block is separated from others in
+        /// the containing block.
+        /// </summary>
+        abstract public Margins Margins { get; }
+        /// <summary>
+        /// Default character formats.
+        /// </summary>
+        abstract public RtfCharFormat DefaultCharFormat { get; }
+        /// <summary>
+        /// When set to true, this block will be arranged in the beginning
+        /// of a new page.
+        /// </summary>
+        abstract public bool StartNewPage { get; set; }
+        /// <summary>
+        /// Internal use only.
+        /// Beginning RTF control words for this block.
+        /// </summary>
+        abstract internal string BlockHead { set; }
+        /// <summary>
+        /// Internal use only.
+        /// Ending RTF control word for this block.
+        /// </summary>
+        abstract internal string BlockTail { set; }
+
+        protected string AlignmentCode()
+        {
+            switch (Alignment)
+            {
+                case Align.Left:
+                    return @"\ql";
+                case Align.Right:
+                    return @"\qr";
+                case Align.Center:
+                    return @"\qc";
+                case Align.FullyJustify:
+                    return @"\qj";
+                default:
+                    return @"\qd";
+            }
+        }
+    }
+}