[Test] Enable trimming and AOT analysis for the whole project.

src/Directory.Build.targets

@@ -0,0 +1,6 @@
+<Project>
+  <PropertyGroup Condition="'$(IsTestProject)' != 'true'">
+    <IsTrimmable Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net6.0'))">true</IsTrimmable>
+    <IsAotCompatible Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net8.0'))">true</IsAotCompatible>
+  </PropertyGroup>
+</Project>

src/UglyToad.PdfPig.DocumentLayoutAnalysis/Export/AltoXmlTextExporter.cs

@@ -4,6 +4,7 @@
     using Content;
     using DocumentLayoutAnalysis;
     using System;
+    using System.Diagnostics.CodeAnalysis;
     using System.Globalization;
     using System.Linq;
     using System.Xml;
@@ -94,6 +95,9 @@ private AltoXmlTextExporter(IWordExtractor wordExtractor, IPageSegmenter pageSeg
         /// </summary>
         /// <param name="document">The document to extract page layouts from.</param>
         /// <param name="includePaths">Draw PdfPaths present in the page.</param>
+#if NET6_0_OR_GREATER
+        [RequiresUnreferencedCode("Members from AltoDocument may be trimmed if not referenced directly")]
+#endif
         public string Get(PdfDocument document, bool includePaths = false)
         {
             var altoDocument = CreateAltoDocument("unknown");
@@ -105,13 +109,19 @@ public string Get(PdfDocument document, bool includePaths = false)
         /// Get the Alto (XML) string of the page layout. Excludes <see cref="T:UglyToad.PdfPig.Geometry.PdfSubpath" />s.
         /// </summary>
         /// <param name="page">The page to export the XML layout for.</param>
+#if NET6_0_OR_GREATER
+        [RequiresUnreferencedCode("Members from PageXmlDocument may be trimmed if not referenced directly")]
+#endif
         public string Get(Page page) => Get(page, false);
 
         /// <summary>
         /// Get the Alto (XML) string of the page layout.
         /// </summary>
         /// <param name="page">The page to export the XML layout for.</param>
         /// <param name="includePaths">Whether the output should include the PdfPaths present in the page.</param>
+#if NET6_0_OR_GREATER
+        [RequiresUnreferencedCode("Members from AltoDocument may be trimmed if not referenced directly")]
+#endif
         public string Get(Page page, bool includePaths)
         {
             var document = CreateAltoDocument("unknown");
@@ -355,6 +365,9 @@ private AltoDocument.AltoDescription GetAltoDescription(string fileName)
             };
         }
 
+#if NET6_0_OR_GREATER
+        [RequiresUnreferencedCode("Members from AltoDocument may be trimmed if not referenced directly")]
+#endif
         private string Serialize(AltoDocument altoDocument)
         {
             var serializer = new XmlSerializer(typeof(AltoDocument));
@@ -377,6 +390,9 @@ private string Serialize(AltoDocument altoDocument)
         /// <summary>
         /// Deserialize an <see cref="AltoDocument"/> from a given Alto format XML document.
         /// </summary>
+#if NET6_0_OR_GREATER
+        [RequiresUnreferencedCode("Members from AltoDocument may be trimmed if not referenced directly")]
+#endif
         public static AltoDocument Deserialize(string xmlPath)
         {
             var serializer = new XmlSerializer(typeof(AltoDocument));

src/UglyToad.PdfPig.DocumentLayoutAnalysis/Export/PageXmlTextExporter.cs

@@ -10,6 +10,7 @@
     using ReadingOrderDetector;
     using System;
     using System.Collections.Generic;
+    using System.Diagnostics.CodeAnalysis;
     using System.Linq;
     using System.Xml;
     using System.Xml.Serialization;
@@ -105,6 +106,9 @@ public string Get(PdfDocument document, bool includePaths = false)
         /// Get the PAGE-XML (XML) string of the pages layout. Excludes PdfPaths.
         /// </summary>
         /// <param name="page"></param>
+#if NET6_0_OR_GREATER
+        [RequiresUnreferencedCode("Members from PageXmlDocument may be trimmed if not referenced directly")]
+#endif
         public string Get(Page page)
         {
             return Get(page, false);
@@ -115,6 +119,9 @@ public string Get(Page page)
         /// </summary>
         /// <param name="page"></param>
         /// <param name="includePaths">Draw PdfPaths present in the page.</param>
+#if NET6_0_OR_GREATER
+        [RequiresUnreferencedCode("Members from PageXmlDocument may be trimmed if not referenced directly")]
+#endif
         public string Get(Page page, bool includePaths)
         {
             PageXmlData data = new PageXmlData();
@@ -373,6 +380,9 @@ private PageXmlDocument.PageXmlGlyph ToPageXmlGlyph(Letter letter, PageXmlData d
             };
         }
 
+#if NET6_0_OR_GREATER
+        [RequiresUnreferencedCode("Members from PageXmlDocument may be trimmed if not referenced directly")]
+#endif
         private string Serialize(PageXmlDocument pageXmlDocument)
         {
             XmlSerializer serializer = new XmlSerializer(typeof(PageXmlDocument));
@@ -395,6 +405,9 @@ private string Serialize(PageXmlDocument pageXmlDocument)
         /// <summary>
         /// Deserialize an <see cref="PageXmlDocument"/> from a given PAGE format XML document.
         /// </summary>
+#if NET6_0_OR_GREATER
+        [RequiresUnreferencedCode("Members from PageXmlDocument may be trimmed if not referenced directly")]
+#endif
         public static PageXmlDocument Deserialize(string xmlPath)
         {
             XmlSerializer serializer = new XmlSerializer(typeof(PageXmlDocument));

src/UglyToad.PdfPig.sln

@@ -10,6 +10,7 @@ EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{C55738D2-3165-4D03-9CE2-10A2E2EEC465}"
 	ProjectSection(SolutionItems) = preProject
 		.editorconfig = .editorconfig
+		Directory.Build.targets = Directory.Build.targets
 	EndProjectSection
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "UglyToad.PdfPig.Fonts", "UglyToad.PdfPig.Fonts\UglyToad.PdfPig.Fonts.csproj", "{BBC8F94C-6E94-43FF-AB2E-47FF3C2B999F}"