From 08a37666fe68c4ddef54ffe6836f727679bf042d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marcin=20Zi=C4=85bek?= <marcin.ziabek@uj.edu.pl>
Date: Wed, 1 Sep 2021 19:14:52 +0200
Subject: [PATCH] 2021.9.1

---
 QuestPDF.Examples/ContinousPage.cs   | 46 ++++++++++++++++++++++++++++
 QuestPDF/Elements/Page.cs            | 14 ++++++++-
 QuestPDF/Fluent/ElementExtensions.cs |  8 ++---
 QuestPDF/Fluent/PageExtensions.cs    | 20 +++++++++---
 QuestPDF/QuestPDF.csproj             |  4 +--
 5 files changed, 80 insertions(+), 12 deletions(-)
 create mode 100644 QuestPDF.Examples/ContinousPage.cs

diff --git a/QuestPDF.Examples/ContinousPage.cs b/QuestPDF.Examples/ContinousPage.cs
new file mode 100644
index 0000000..5593d5f
--- /dev/null
+++ b/QuestPDF.Examples/ContinousPage.cs
@@ -0,0 +1,46 @@
+using System.Diagnostics;
+using System.Linq;
+using NUnit.Framework;
+using QuestPDF.Drawing;
+using QuestPDF.Examples.Engine;
+using QuestPDF.Fluent;
+using QuestPDF.Helpers;
+using QuestPDF.Infrastructure;
+
+namespace QuestPDF.Examples
+{
+    public class ContinuousPageDocument : IDocument
+    {
+        public DocumentMetadata GetMetadata() => DocumentMetadata.Default;
+
+        public void Compose(IDocumentContainer container)
+        {
+            container.Page(page =>
+            {
+                page.Margin(20);
+                page.ContinuousSize(150);
+                
+                page.Header().Text("Header");
+                
+                page.Content().PaddingVertical(10).Border(1).Padding(10).Stack(stack =>
+                {
+                    foreach (var index in Enumerable.Range(1, 100))
+                        stack.Item().Text($"Line {index}", TextStyle.Default.Color(Placeholders.Color()));
+                });
+                
+                page.Footer().Text("Footer");
+            });
+        }
+    }
+    
+    public class ContinuousPageExamples
+    {
+        [Test]
+        public void ContinuousPage()
+        {
+            var path = "example.pdf";
+            new ContinuousPageDocument().GeneratePdf(path);
+            Process.Start("explorer", path);
+        }
+    }
+}
\ No newline at end of file
diff --git a/QuestPDF/Elements/Page.cs b/QuestPDF/Elements/Page.cs
index 08ffd6c..792638b 100644
--- a/QuestPDF/Elements/Page.cs
+++ b/QuestPDF/Elements/Page.cs
@@ -1,3 +1,4 @@
+using System;
 using QuestPDF.Fluent;
 using QuestPDF.Helpers;
 using QuestPDF.Infrastructure;
@@ -36,9 +37,20 @@ namespace QuestPDF.Elements
                 .Decoration(decoration =>
                 {
                     decoration.Header().Element(Header);
-                    decoration.Content().Extend().Element(Content);
+                    
+                    decoration
+                        .Content()
+                        .Element(x => IsClose(MinSize.Width, MaxSize.Width) ? x.ExtendHorizontal() : x)
+                        .Element(x => IsClose(MinSize.Height, MaxSize.Height) ? x.ExtendVertical() : x)
+                        .Element(Content);
+                    
                     decoration.Footer().Element(Footer);
                 });
+
+            bool IsClose(float x, float y)
+            {
+                return Math.Abs(x - y) < Size.Epsilon;
+            }
         }
     }
 }
\ No newline at end of file
diff --git a/QuestPDF/Fluent/ElementExtensions.cs b/QuestPDF/Fluent/ElementExtensions.cs
index 591afd4..562173c 100644
--- a/QuestPDF/Fluent/ElementExtensions.cs
+++ b/QuestPDF/Fluent/ElementExtensions.cs
@@ -18,10 +18,10 @@ namespace QuestPDF.Fluent
         {
             if (element?.Child != null && element.Child is Empty == false)
             {
-                var message = $"Container {element.GetType().Name} already contains an {element.Child.GetType().Name} child. " +
-                              $"Tried to assign {child?.GetType()?.Name}." +
-                              $"You should not assign multiple elements to single-child containers.";
-                
+                var message = "You should not assign multiple child elements to a single-child container. " +
+                              "This may happen when a container variable is used outside of its scope/closure OR the container is used in multiple fluent API chains OR the container is used incorrectly in a loop. " +
+                              "This exception is thrown to help you detect that some part of the code is overriding fragments of the document layout with a new content - essentially destroying existing content.";
+
                 throw new DocumentComposeException(message);
             }
 
diff --git a/QuestPDF/Fluent/PageExtensions.cs b/QuestPDF/Fluent/PageExtensions.cs
index 4a9212d..24a35a8 100644
--- a/QuestPDF/Fluent/PageExtensions.cs
+++ b/QuestPDF/Fluent/PageExtensions.cs
@@ -12,14 +12,24 @@ namespace QuestPDF.Fluent
 
         public void Size(PageSize pageSize)
         {
-            Page.MinSize = pageSize;
-            Page.MaxSize = pageSize;
+            MinSize(pageSize);
+            MaxSize(pageSize);
         }
-
+        
         public void ContinuousSize(float width)
         {
-            Page.MinSize = new PageSize(width, 0);
-            Page.MaxSize = new PageSize(width, Infrastructure.Size.Max.Height);
+            MinSize(new PageSize(width, 0));
+            MaxSize(new PageSize(width, Infrastructure.Size.Max.Height));
+        }
+
+        public void MinSize(PageSize pageSize)
+        {
+            Page.MinSize = pageSize;
+        }
+        
+        public void MaxSize(PageSize pageSize)
+        {
+            Page.MaxSize = pageSize;
         }
 
         public void MarginLeft(float value)
diff --git a/QuestPDF/QuestPDF.csproj b/QuestPDF/QuestPDF.csproj
index bfcd625..91c549a 100644
--- a/QuestPDF/QuestPDF.csproj
+++ b/QuestPDF/QuestPDF.csproj
@@ -4,9 +4,9 @@
         <Authors>MarcinZiabek</Authors>
         <Company>CodeFlint</Company>
         <PackageId>QuestPDF</PackageId>
-        <Version>2021.9.0</Version>
+        <Version>2021.9.1</Version>
         <PackageDescription>QuestPDF is an open-source, modern and battle-tested library that can help you with generating PDF documents by offering friendly, discoverable and predictable C# fluent API.</PackageDescription>
-        <PackageReleaseNotes>Added support for registering custom fonts from a stream.</PackageReleaseNotes>
+        <PackageReleaseNotes>Added support for registering custom fonts from a stream. Fixed continouos page setting. Improved exception messages.</PackageReleaseNotes>
         <LangVersion>8</LangVersion>
         <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
         <PackageIcon>Logo.png</PackageIcon>