Resolves #3 - Change PdfDocument.Info.Producer property from read-only to read/write

Author: JasonPierce

PdfSharp/PdfSharp.Pdf/PdfDocument.cs

@@ -365,22 +365,14 @@ internal override void PrepareForSave()
     {
       PdfDocumentInformation info = Info;
 
+      // Set Producer if value is undefined
+      if (info.Elements[PdfDocumentInformation.Keys.Producer] == null)
+        info.Producer = VersionInfo.Producer;     
+
       // Set Creator if value is undefined
       if (info.Elements[PdfDocumentInformation.Keys.Creator] == null)
         info.Creator = VersionInfo.Producer;
 
-      // Keep original producer if file was imported
-      string producer = info.Producer;
-      if (producer.Length == 0)
-        producer = VersionInfo.Producer;
-      else
-      {
-        // Prevent endless concatenation if file is edited with PDFsharp more than once
-        if (!producer.StartsWith(VersionInfo.Title))
-          producer = VersionInfo.Producer + " (Original: " + producer + ")";
-      }
-      info.Elements.SetString(PdfDocumentInformation.Keys.Producer, producer);
-
       // Prepare used fonts
       if (this.fontTable != null)
         this.fontTable.PrepareForSave();

PdfSharp/PdfSharp.Pdf/PdfDocumentInformation.cs

@@ -102,11 +102,12 @@ public string Creator
     }
 
     /// <summary>
-    /// Gets the producer application (for example, PDFsharp).
+    /// Gets or sets the name of the producer application (for example, PDFsharp).
     /// </summary>
     public string Producer
     {
       get { return Elements.GetString(Keys.Producer); }
+      set { Elements.SetString(Keys.Producer, value); }
     }
 
     /// <summary>