Fixed text rendering corner case: measuring span with space at the end of the line may overflow available space

2022.2.5
2022.2.4
2022-03-08 18:33:34 +01:00 · 2022-02-18 23:31:53 +01:00 · 2022-02-18 21:48:57 +01:00 · 2022-02-07 22:29:59 +01:00 · 2022-02-07 22:25:48 +01:00 · 2022-02-07 22:04:55 +01:00
25 changed files with 555 additions and 185 deletions
@@ -0,0 +1,70 @@
+# For most projects, this workflow file will not need changing; you simply need
+# to commit it to your repository.
+#
+# You may wish to alter this file to override the set of languages analyzed,
+# or to provide custom queries or build logic.
+#
+# ******** NOTE ********
+# We have attempted to detect the languages in your repository. Please check
+# the `language` matrix defined below to confirm you have the correct set of
+# supported CodeQL languages.
+#
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ main ]
+  schedule:
+    - cron: '22 16 * * 5'
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'csharp' ]
+        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python', 'ruby' ]
+        # Learn more about CodeQL language support at https://git.io/codeql-language-support
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v1
+      with:
+        languages: ${{ matrix.language }}
+        # If you wish to specify custom queries, you can do so here or in a config file.
+        # By default, queries listed here will override any specified in a config file.
+        # Prefix the list here with "+" to use these queries and those in the config file.
+        # queries: ./path/to/local/query, your-org/your-repo/queries@main
+
+    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+    # If this step fails, then you should remove it and run the build manually (see below)
+    - name: Autobuild
+      uses: github/codeql-action/autobuild@v1
+
+    # ℹ️ Command-line programs to run using the OS shell.
+    # 📚 https://git.io/JvXDl
+
+    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
+    #    and modify them (or add more) to build your code if your project
+    #    uses a compiled language
+
+    #- run: |
+    #   make bootstrap
+    #   make release
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v1
@@ -1,4 +1,6 @@
-using NUnit.Framework;
+using System;
+using System.Linq;
+using NUnit.Framework;
 using QuestPDF.Examples.Engine;
 using QuestPDF.Fluent;
 using QuestPDF.Helpers;
@@ -20,18 +22,35 @@ namespace QuestPDF.Examples
                {
                    container.Column(column =>
                    {
-                        column.Item().Element(Block);
+                        foreach (var i in Enumerable.Range(0, 10))
+                            column.Item().Element(Block);

                        static void Block(IContainer container)
                        {
                            container
                                .Width(72)
-                                .Height(3.5f)
-                                .Height(1.5f)
+                                .Height(3.5f, Unit.Inch)
+                                .Height(1.5f, Unit.Inch)
                                .Background(Placeholders.BackgroundColor());
                        }
                    });
                });
        }
+        
+        [Test]
+        public void Stability_NoItems()
+        {
+            RenderingTest
+                .Create()
+                .ProducePdf()
+                .MaxPages(100)
+                .PageSize(250, 150)
+                .Render(container =>
+                {
+                    container
+                        .Padding(25)
+                        .Column(column => { });
+                });
+        }
    }
 }
@@ -0,0 +1,76 @@
+using NUnit.Framework;
+using QuestPDF.Drawing.Exceptions;
+using QuestPDF.Examples.Engine;
+using QuestPDF.Fluent;
+using QuestPDF.Helpers;
+using QuestPDF.Infrastructure;
+
+namespace QuestPDF.Examples
+{
+    public class ExecutionOrderExamples
+    {
+        [Test]
+        public void Example()
+        {
+            RenderingTest
+                .Create()
+                .PageSize(400, 300)
+                .ProduceImages()
+                .ShowResults()
+                .Render(container =>
+                {
+                    container
+                        .DefaultTextStyle(TextStyle.Default.Size(18))
+                        .Padding(25)
+                        .Row(row =>
+                        {
+                            row.Spacing(25);
+
+                            row.RelativeItem()
+                                .Border(1)
+                                .Padding(15)
+                                .Background(Colors.Grey.Lighten2)
+                                .Text("Lorem ipsum");
+                            
+                            row.RelativeItem()
+                                .Border(1)
+                                .Background(Colors.Grey.Lighten2)
+                                .Padding(15)
+                                .Text("dolor sit amet");
+                        });
+                });
+        }
+        
+        [Test]
+        public void Example2()
+        {
+            RenderingTest
+                .Create()
+                .PageSize(200, 200)
+                .ProduceImages()
+                .ShowResults()
+                .Render(container =>
+                {
+                    container
+                        .Padding(25)
+                        .Border(2)
+                        .Width(150)
+                        .Height(150)
+
+                        .Background(Colors.Blue.Lighten2)
+                        .PaddingTop(50)
+
+                        .Background(Colors.Green.Lighten2)
+                        .PaddingRight(50)
+
+                        .Background(Colors.Red.Lighten2)
+                        .PaddingBottom(50)
+
+                        .Background(Colors.Amber.Lighten2)
+                        .PaddingLeft(50)
+
+                        .Background(Colors.Grey.Lighten2);
+                });
+        }
+    }
+}
@@ -12,6 +12,7 @@
        <PackageReference Include="NUnit3TestAdapter" Version="4.0.0" />
        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.4.0" />
        <PackageReference Include="SkiaSharp" Version="2.80.3" />
+        <PackageReference Include="Svg.Skia" Version="0.5.10" />
    </ItemGroup>

    <ItemGroup>
@@ -28,6 +29,9 @@
      <None Update="logo.png">
        <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
      </None>
+      <None Update="pdf-icon.svg">
+        <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+      </None>
    </ItemGroup>

 </Project>
@@ -89,5 +89,21 @@ namespace QuestPDF.Examples
                    .ShowOnce();
            }
        }
+        
+        [Test]
+        public void Stability_NoItems()
+        {
+            RenderingTest
+                .Create()
+                .ProducePdf()
+                .MaxPages(100)
+                .PageSize(250, 150)
+                .Render(container =>
+                {
+                    container
+                        .Padding(25)
+                        .Row(row => { });
+                });
+        }
    }
 }
@@ -0,0 +1,36 @@
+using NUnit.Framework;
+using QuestPDF.Examples.Engine;
+using QuestPDF.Fluent;
+using QuestPDF.Helpers;
+using QuestPDF.Infrastructure;
+using SkiaSharp;
+using Svg.Skia;
+
+namespace QuestPDF.Examples
+{
+    public class SvgImageExample
+    {
+        [Test]
+        public void BorderRadius()
+        {
+            RenderingTest
+                .Create()
+                .PageSize(175, 100)
+                .ProduceImages()
+                .ShowResults()
+                .Render(container =>
+                {
+                    container
+                        .Background(Colors.Grey.Lighten2)
+                        .Padding(25)
+                        .Canvas((canvas, space) =>
+                        {
+                            using var svg = new SKSvg();
+                            svg.Load("pdf-icon.svg");
+                            
+                            canvas.DrawPicture(svg.Picture);
+                        });
+                });
+        }
+    }
+}
@@ -49,6 +49,39 @@ namespace QuestPDF.Examples
                });
        }
        
+        [Test]
+        public void PagingSupport()
+        {
+            RenderingTest
+                .Create()
+                .ProducePdf()
+                .PageSize(420, 220)
+                .ShowResults()
+                .Render(container =>
+                {
+                    container
+                        .Padding(10)
+                        .MinimalBox()
+                        .Border(1)
+                        .Table(table =>
+                        {
+                            table.ColumnsDefinition(columns =>
+                            {
+                                columns.RelativeColumn();
+                                columns.RelativeColumn();
+                                columns.RelativeColumn();
+                                columns.RelativeColumn();
+                            });
+
+                            // by using custom 'Element' method, we can reuse visual configuration
+                            table.Cell().Element(Block).Text(Placeholders.Label());
+                            table.Cell().Element(Block).Text(Placeholders.Label());
+                            table.Cell().Element(Block).Text(Placeholders.Paragraph());
+                            table.Cell().Element(Block).Text(Placeholders.Label());
+                        });
+                });
+        }
+        
        [Test]
        public void DefaultCellStyle()
        {
@@ -217,7 +250,7 @@ namespace QuestPDF.Examples
            RenderingTest
                .Create()
                .ProduceImages()
-                .PageSize(220, 220)
+                .PageSize(220, 170)
                .ShowResults()
                .Render(container =>
                {
@@ -380,7 +413,7 @@ namespace QuestPDF.Examples
                .EnableCaching()
                .EnableDebugging(false)
                .ShowResults()
-                .Render(container => GeneratePerformanceStructure(container, 1000));
+                .Render(container => GeneratePerformanceStructure(container, 250));
        }
        
        public static void GeneratePerformanceStructure(IContainer container, int repeats)
@@ -456,8 +489,10 @@ namespace QuestPDF.Examples
            return container
                .Border(1)
                .Background(Colors.Grey.Lighten3)
+                .ShowOnce()
                .MinWidth(50)
                .MinHeight(50)
+                .Padding(10)
                .AlignCenter()
                .AlignMiddle();
        }
@@ -267,5 +267,30 @@ namespace QuestPDF.Examples
                        });
                });
        }
+        
+        [Test]
+        public void MeasureIssueWhenSpaceAtLineEnd()
+        {
+            // issue 135
+            
+            RenderingTest
+                .Create()
+                .ProduceImages()
+                .ShowResults()
+                .RenderDocument(container =>
+                {
+                    container.Page(page =>
+                    {
+                        page.Margin(50);
+                        page.Background(Colors.White);
+
+                        page.Size(PageSizes.A4);
+
+                        page.Content().Text( 
+                            "This is a specially crafted sentence with a specially chosen length for demonstration of the bug that occurs ;;;;;. ",
+                            TextStyle.Default.Size(11));
+                    });
+                });
+        }
    }
 }
@@ -0,0 +1,149 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="75.320129mm"
+   height="92.604164mm"
+   viewBox="0 0 75.320129 92.604164"
+   version="1.1"
+   id="svg8"
+   inkscape:version="0.92.3 (2405546, 2018-03-11)"
+   sodipodi:docname="PDF file icon.svg">
+  <title
+     id="title2682">PDF file icon</title>
+  <defs
+     id="defs2">
+    <clipPath
+       clipPathUnits="userSpaceOnUse"
+       id="clipPath839">
+      <rect
+         style="opacity:1;fill:#000000;fill-opacity:1;fill-rule:nonzero;stroke:none;stroke-width:1;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;paint-order:fill markers stroke"
+         id="rect841"
+         width="68.688263"
+         height="67.886459"
+         x="-74.033661"
+         y="141.44913" />
+    </clipPath>
+  </defs>
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="0.98994949"
+     inkscape:cx="122.12727"
+     inkscape:cy="167.02823"
+     inkscape:document-units="mm"
+     inkscape:current-layer="g899"
+     showgrid="false"
+     inkscape:object-nodes="false"
+     inkscape:window-width="1366"
+     inkscape:window-height="705"
+     inkscape:window-x="-8"
+     inkscape:window-y="-8"
+     inkscape:window-maximized="1"
+     inkscape:snap-page="false"
+     inkscape:snap-others="false"
+     fit-margin-top="0"
+     fit-margin-left="0"
+     fit-margin-right="0"
+     fit-margin-bottom="0" />
+  <metadata
+     id="metadata5">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title>PDF file icon</dc:title>
+        <dc:date>08/10/2018</dc:date>
+        <dc:creator>
+          <cc:Agent>
+            <dc:title>Adobe Systems</dc:title>
+          </cc:Agent>
+        </dc:creator>
+        <dc:publisher>
+          <cc:Agent>
+            <dc:title>CMetalCore</dc:title>
+          </cc:Agent>
+        </dc:publisher>
+        <dc:description>Fuente del texto &quot;PDF&quot;:
+Franklin Gothic Medium Cond</dc:description>
+        <cc:license
+           rdf:resource="http://creativecommons.org/licenses/by-sa/4.0/" />
+      </cc:Work>
+      <cc:License
+         rdf:about="http://creativecommons.org/licenses/by-sa/4.0/">
+        <cc:permits
+           rdf:resource="http://creativecommons.org/ns#Reproduction" />
+        <cc:permits
+           rdf:resource="http://creativecommons.org/ns#Distribution" />
+        <cc:requires
+           rdf:resource="http://creativecommons.org/ns#Notice" />
+        <cc:requires
+           rdf:resource="http://creativecommons.org/ns#Attribution" />
+        <cc:permits
+           rdf:resource="http://creativecommons.org/ns#DerivativeWorks" />
+        <cc:requires
+           rdf:resource="http://creativecommons.org/ns#ShareAlike" />
+      </cc:License>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Capa 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(36.076172,-93.731774)">
+    <g
+       id="g899"
+       transform="matrix(1.4843054,0,0,1.4843054,17.471885,-90.243502)">
+      <g
+         id="g876">
+        <path
+           inkscape:connector-curvature="0"
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+             id="path845"
+             style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:medium;line-height:125%;font-family:'Franklin Gothic Medium Cond';-inkscape-font-specification:'Franklin Gothic Medium Cond';letter-spacing:0px;word-spacing:4.26000023px;fill:#2c2c2c;fill-opacity:1;stroke:none;stroke-width:0.35824656px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+             d="m -20.930423,167.83862 h 2.364986 q 1.133514,0 1.840213,0.2169 0.706698,0.20991 1.189489,0.9446 0.482795,0.72769 0.482795,1.75625 0,0.94459 -0.391832,1.6233 -0.391833,0.67871 -1.056548,0.97958 -0.65772,0.30087 -2.02913,0.30087 h -0.818651 v 3.72941 h -1.581322 z m 1.581322,1.22447 v 3.33058 h 0.783664 q 1.049552,0 1.44838,-0.39184 0.405826,-0.39183 0.405826,-1.27345 0,-0.65772 -0.265887,-1.06355 -0.265884,-0.41282 -0.587747,-0.50378 -0.314866,-0.098 -1.000572,-0.098 z" />
+          <path
+             inkscape:connector-curvature="0"
+             id="path847"
+             style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:medium;line-height:125%;font-family:'Franklin Gothic Medium Cond';-inkscape-font-specification:'Franklin Gothic Medium Cond';letter-spacing:0px;word-spacing:4.26000023px;fill:#2c2c2c;fill-opacity:1;stroke:none;stroke-width:0.35824656px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+             d="m -13.842461,167.83862 h 2.148082 q 1.560333,0 2.4909318,0.55276 0.9375993,0.55276 1.4133973,1.6443 0.482791,1.09153 0.482791,2.42096 0,1.3994 -0.4338151,2.49793 -0.4268149,1.09153 -1.3154348,1.76324 -0.8816233,0.67172 -2.5189212,0.67172 h -2.267031 z m 1.581326,1.26645 v 7.018 h 0.657715 q 1.378411,0 2.001144,-0.9516 0.6227329,-0.95858 0.6227329,-2.5539 0,-3.5125 -2.6238769,-3.5125 z" />
+          <path
+             inkscape:connector-curvature="0"
+             id="path849"
+             style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:medium;line-height:125%;font-family:'Franklin Gothic Medium Cond';-inkscape-font-specification:'Franklin Gothic Medium Cond';letter-spacing:0px;word-spacing:4.26000023px;fill:#2c2c2c;fill-opacity:1;stroke:none;stroke-width:0.35824656px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+             d="m -5.7889096,167.83862 h 5.30372941 v 1.26645 H -4.2075842 v 2.85478 h 2.9807225 v 1.26646 h -2.9807225 v 4.16322 h -1.5813254 z" />
+        </g>
+      </g>
+    </g>
+  </g>
+</svg>
@@ -17,19 +17,30 @@ namespace QuestPDF.Drawing
    {
        internal static void GeneratePdf(Stream stream, IDocument document)
        {
+            CheckIfStreamIsCompatible(stream);
+            
            var metadata = document.GetMetadata();
-            var writeOnlyStream = new WriteOnlyStream(stream);
-            var canvas = new PdfCanvas(writeOnlyStream, metadata);
+            var canvas = new PdfCanvas(stream, metadata);
            RenderDocument(canvas, document);
        }
        
        internal static void GenerateXps(Stream stream, IDocument document)
        {
+            CheckIfStreamIsCompatible(stream);
+            
            var metadata = document.GetMetadata();
-            var writeOnlyStream = new WriteOnlyStream(stream);
-            var canvas = new XpsCanvas(writeOnlyStream, metadata);
+            var canvas = new XpsCanvas(stream, metadata);
            RenderDocument(canvas, document);
        }
+
+        private static void CheckIfStreamIsCompatible(Stream stream)
+        {
+            if (!stream.CanWrite)
+                throw new ArgumentException("The library requires a Stream object with the 'write' capability available (the CanWrite flag). Please consider using the MemoryStream class.");
+            
+            if (!stream.CanSeek)
+                throw new ArgumentException("The library requires a Stream object with the 'seek' capability available (the CanSeek flag). Please consider using the MemoryStream class.");
+        }
        
        internal static ICollection<byte[]> GenerateImages(IDocument document)
        {
@@ -6,16 +6,16 @@ namespace QuestPDF.Drawing
 {
    internal class SkiaDocumentCanvasBase : SkiaCanvasBase
    {
-        private SKDocument Document { get; }
+        private SKDocument? Document { get; }

-        public SkiaDocumentCanvasBase(SKDocument document)
+        protected SkiaDocumentCanvasBase(SKDocument document)
        {
            Document = document;
        }

        ~SkiaDocumentCanvasBase()
        {
-            Document.Dispose();
+            Document?.Dispose();
        }
        
        public override void BeginDocument()
@@ -25,7 +25,7 @@ namespace QuestPDF.Drawing

        public override void EndDocument()
        {
-            Canvas.Dispose();
+            Canvas?.Dispose();
            
            Document.Close();
            Document.Dispose();
@@ -41,6 +41,9 @@ namespace QuestPDF.Elements

        internal override SpacePlan Measure(Size availableSpace)
        {
+            if (!Items.Any())
+                return SpacePlan.FullRender(Size.Zero);
+            
            var renderingCommands = PlanLayout(availableSpace);

            if (!renderingCommands.Any())
@@ -25,8 +25,8 @@ namespace QuestPDF.Elements
        {
            return Type switch
            {
-                LineType.Vertical when availableSpace.Width >= Size => SpacePlan.FullRender(Size, 0),
-                LineType.Horizontal when availableSpace.Height >= Size => SpacePlan.FullRender(0, Size),
+                LineType.Vertical when availableSpace.Width + Infrastructure.Size.Epsilon >= Size => SpacePlan.FullRender(Size, 0),
+                LineType.Horizontal when availableSpace.Height + Infrastructure.Size.Epsilon >= Size => SpacePlan.FullRender(0, Size),
                _ => SpacePlan.Wrap()
            };
        }
@@ -53,6 +53,9 @@ namespace QuestPDF.Elements

        internal override SpacePlan Measure(Size availableSpace)
        {
+            if (!Items.Any())
+                return SpacePlan.FullRender(Size.Zero);
+            
            UpdateItemsWidth(availableSpace.Width);
            var renderingCommands = PlanLayout(availableSpace);

@@ -74,6 +77,9 @@ namespace QuestPDF.Elements

        internal override void Draw(Size availableSpace)
        {
+            if (!Items.Any())
+                return;
+
            UpdateItemsWidth(availableSpace.Width);
            var renderingCommands = PlanLayout(availableSpace);

@@ -143,8 +149,12 @@ namespace QuestPDF.Elements
                renderingCommands.Add(command);
                leftOffset += item.Width + Spacing;
            }
-
-            var rowHeight = renderingCommands.Where(x => !x.RowItem.IsRendered).Max(x => x.Measurement.Height);
+            
+            var rowHeight = renderingCommands
+                .Where(x => !x.RowItem.IsRendered)
+                .Select(x => x.Measurement.Height)
+                .DefaultIfEmpty(0)
+                .Max();
            
            foreach (var command in renderingCommands)
            {
@@ -17,8 +17,10 @@ namespace QuestPDF.Elements
            if (perfectScale == null)
                return SpacePlan.Wrap();

-            var targetSpace = ScaleSize(availableSpace, perfectScale.Value);
-            return SpacePlan.FullRender(targetSpace);
+            var scaledSpace = ScaleSize(availableSpace, 1 / perfectScale.Value);
+            var childSizeInScale = Child.Measure(scaledSpace);
+            var childSizeInOriginalScale = ScaleSize(childSizeInScale, perfectScale.Value);
+            return SpacePlan.FullRender(childSizeInOriginalScale);
        }
        
        internal override void Draw(Size availableSpace)
@@ -15,15 +15,19 @@ namespace QuestPDF.Elements.Table
        public List<TableCell> Cells { get; set; } = new List<TableCell>();
        public bool ExtendLastCellsToTableBottom { get; set; }
        
-        // cache for efficient cell finding
-        // index of first array - number of row
-        // nested array - collection of all cells starting at given row
-        private TableCell[][] OrderedCells { get; set; }
-        
        private int StartingRowsCount { get; set; }
        private int RowsCount { get; set; }
        private int CurrentRow { get; set; }
        
+        internal override void Initialize(IPageContext pageContext, ICanvas canvas)
+        {
+            StartingRowsCount = Cells.Select(x => x.Row).DefaultIfEmpty(0).Max();
+            RowsCount = Cells.Select(x => x.Row + x.RowSpan - 1).DefaultIfEmpty(0).Max();
+            Cells = Cells.OrderBy(x => x.Row).ThenBy(x => x.Column).ToList();
+
+            base.Initialize(pageContext, canvas);
+        }
+        
        internal override IEnumerable<Element?> GetChildren()
        {
            return Cells;
@@ -31,24 +35,6 @@ namespace QuestPDF.Elements.Table

        public void ResetState()
        {
-            if (StartingRowsCount == default)
-                StartingRowsCount = Cells.Select(x => x.Row).DefaultIfEmpty(0).Max();
-            
-            if (RowsCount == default)
-                RowsCount = Cells.Select(x => x.Row + x.RowSpan - 1).DefaultIfEmpty(0).Max();
-
-            if (OrderedCells == default)
-            {
-                var groups = Cells
-                    .GroupBy(x => x.Row)
-                    .ToDictionary(x => x.Key, x => x.OrderBy(y => y.Column).ToArray());
-            
-                OrderedCells = Enumerable
-                    .Range(0, RowsCount + 1)
-                    .Select(x => groups.TryGetValue(x, out var output) ? output : Array.Empty<TableCell>())
-                    .ToArray();   
-            }
-
            Cells.ForEach(x => x.IsRendered = false);
            CurrentRow = 1;
        }
@@ -85,6 +71,9 @@ namespace QuestPDF.Elements.Table
            {
                if (command.Measurement.Type == SpacePlanType.FullRender)
                    command.Cell.IsRendered = true;
+
+                if (command.Measurement.Type == SpacePlanType.Wrap)
+                    continue;
                
                Canvas.Translate(command.Offset);
                command.Cell.Draw(command.Size);
@@ -103,7 +92,7 @@ namespace QuestPDF.Elements.Table
        {
            return commands
                .GroupBy(x => x.Cell.Row)
-                .Where(x => x.All(y => y.Measurement.Type == SpacePlanType.FullRender))
+                .Where(x => x.All(y => y.Cell.IsRendered || y.Measurement.Type == SpacePlanType.FullRender))
                .Select(x => x.Key)
                .DefaultIfEmpty(0)
                .Max();
@@ -152,16 +141,12 @@ namespace QuestPDF.Elements.Table
            ICollection<TableCellRenderingCommand> GetRenderingCommands()
            {
                var rowBottomOffsets = new DynamicDictionary<int, float>();
+                var commands = new List<TableCellRenderingCommand>();
                
-                var cellsToTry = Enumerable
-                    .Range(CurrentRow, RowsCount - CurrentRow + 1)
-                    .SelectMany(x => OrderedCells[x]);
-            
+                var cellsToTry = Cells.Where(x => x.Row + x.RowSpan - 1 >= CurrentRow);
                var currentRow = CurrentRow;
                var maxRenderingRow = RowsCount;
                
-                var commands = new List<TableCellRenderingCommand>();
-                
                foreach (var cell in cellsToTry)
                {
                    // update position of previous row
@@ -181,10 +166,7 @@ namespace QuestPDF.Elements.Table
                    // cell visibility optimizations
                    if (cell.Row > maxRenderingRow)
                        break;
-                    
-                    if (cell.IsRendered)
-                        continue;
-                    
+
                    // calculate cell position / size
                    var topOffset = rowBottomOffsets[cell.Row - 1];
                    
@@ -1,4 +1,5 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using QuestPDF.Drawing;
 using QuestPDF.Elements.Text.Calculation;
 using QuestPDF.Infrastructure;
@@ -11,13 +12,12 @@ namespace QuestPDF.Elements.Text.Items
        public string Text { get; set; }
        public TextStyle Style { get; set; } = new TextStyle();

-        private Dictionary<(int startIndex, float availableWidth), TextMeasurementResult?> MeasureCache =
-            new Dictionary<(int startIndex, float availableWidth), TextMeasurementResult?>();
+        private Dictionary<(int startIndex, float availableWidth), TextMeasurementResult?> MeasureCache = new ();

        public virtual TextMeasurementResult? Measure(TextMeasurementRequest request)
        {
            var cacheKey = (request.StartIndex, request.AvailableWidth);
-            
+             
            if (!MeasureCache.ContainsKey(cacheKey))
                MeasureCache[cacheKey] = MeasureWithoutCache(request);
            
@@ -52,9 +52,9 @@ namespace QuestPDF.Elements.Text.Items
            }
            
            // start breaking text from requested position
-            var text = Text.Substring(startIndex);
+            var text = Text.AsSpan().Slice(startIndex);
            
-            var textLength = (int)paint.BreakText(text, request.AvailableWidth);
+            var textLength = (int)paint.BreakText(text, request.AvailableWidth + Size.Epsilon);

            if (textLength <= 0)
                return null;
@@ -65,7 +65,7 @@ namespace QuestPDF.Elements.Text.Items
            // break text only on spaces
            if (textLength < text.Length)
            {
-                var lastSpaceIndex = text.Substring(0, textLength).LastIndexOf(space) - 1;
+                var lastSpaceIndex = text.Slice(0, textLength).LastIndexOf(space) - 1;

                if (lastSpaceIndex <= 0)
                {
@@ -78,7 +78,7 @@ namespace QuestPDF.Elements.Text.Items
                }
            }

-            text = text.Substring(0, textLength);
+            text = text.Slice(0, textLength);

            var endIndex = startIndex + textLength;
            var nextIndex = endIndex;
@@ -87,7 +87,8 @@ namespace QuestPDF.Elements.Text.Items
                nextIndex++;
            
            // measure final text
-            var width = paint.MeasureText(text);
+            var finalText = text.TrimEnd();
+            var width = paint.MeasureText(finalText);
            
            return new TextMeasurementResult
            {
@@ -29,6 +29,8 @@ namespace QuestPDF.Fluent
        }
        
        #endregion
+
+        #region XPS
        
        public static byte[] GenerateXps(this IDocument document)
        {
@@ -48,8 +50,6 @@ namespace QuestPDF.Fluent
            DocumentGenerator.GenerateXps(stream, document);
        }
        
-        #region XPS
-        
        #endregion

        #region Images
@@ -1,56 +0,0 @@
-using System;
-using System.IO;
-
-namespace QuestPDF.Helpers
-{
-    /// <summary>
-    /// SkiaSharp calls the Position property when generating target document file.
-    /// If the output stream does not support the Position property, the NullReferenceException is thrown.
-    /// This wrapper fixes this issue by providing cached Position value (always the end of the stream / current length).
-    /// Example stream affected: HttpContext.Response.Body
-    /// </summary>
-    internal class WriteOnlyStream : Stream
-    {
-        private readonly Stream InnerStream;
-        private long StreamLength { get; set; }
-
-        public WriteOnlyStream(Stream stream)
-        {            
-            if (!stream.CanWrite)
-                throw new NotSupportedException("Stream cannot be written");
-
-            InnerStream = stream;
-        }
-
-        public override bool CanRead => false;
-
-        public override bool CanSeek => false;
-
-        public override bool CanWrite => true;
-
-        public override long Length => StreamLength;
-
-        public override long Position
-        { 
-            get => StreamLength; 
-            set => throw new NotImplementedException(); 
-        }
-
-        public override void Flush() => InnerStream.Flush();
-
-        public override int Read(byte[] buffer, int offset, int count) 
-            => throw new NotImplementedException();
-
-        public override long Seek(long offset, SeekOrigin origin) 
-            => throw new NotImplementedException();
-
-        public override void SetLength(long value) 
-            => throw new NotImplementedException();
-
-        public override void Write(byte[] buffer, int offset, int count)
-        {
-            InnerStream.Write(buffer, offset, count);
-            StreamLength += count;
-        }
-    }
-}
@@ -15,7 +15,7 @@ namespace QuestPDF.Infrastructure
            yield break;
        }

-        internal void Initialize(IPageContext pageContext, ICanvas canvas)
+        internal virtual void Initialize(IPageContext pageContext, ICanvas canvas)
        {
            PageContext = pageContext;
            Canvas = canvas;
@@ -32,7 +32,7 @@ namespace QuestPDF.Infrastructure
                    Point => 1,
                    Meter => 100 / InchToCentimetre * InchToPoints,
                    Centimetre => 1 / InchToCentimetre * InchToPoints,
-                    Millimetre => 10 / InchToCentimetre * InchToPoints,
+                    Millimetre => 0.1f / InchToCentimetre * InchToPoints,
                    Feet => 12 * InchToPoints,
                    Inch => InchToPoints,
                    Mill => InchToPoints / 1000f,
@@ -4,7 +4,7 @@
        <Authors>MarcinZiabek</Authors>
        <Company>CodeFlint</Company>
        <PackageId>QuestPDF</PackageId>
-        <Version>2022.2.0</Version>
+        <Version>2022.2.6</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>$([System.IO.File]::ReadAllText("$(MSBuildProjectDirectory)/Resources/ReleaseNotes.txt"))</PackageReleaseNotes>
        <LangVersion>9</LangVersion>
@@ -132,41 +132,42 @@ void ComposeTable(IContainer container)
 {
    var headerStyle = TextStyle.Default.SemiBold();
    
-    container.Decoration(decoration =>
+    container.Table(table =>
    {
-        // header
-        decoration.Header().BorderBottom(1).Padding(5).Row(row => 
+        table.ColumnsDefinition(columns =>
        {
-            row.ConstantColumn(25).Text("#", headerStyle);
-            row.RelativeColumn(3).Text("Product", headerStyle);
-            row.RelativeColumn().AlignRight().Text("Unit price", headerStyle);
-            row.RelativeColumn().AlignRight().Text("Quantity", headerStyle);
-            row.RelativeColumn().AlignRight().Text("Total", headerStyle);
+            columns.ConstantColumn(25);
+            columns.RelativeColumn(3);
+            columns.RelativeColumn();
+            columns.RelativeColumn();
+            columns.RelativeColumn();
        });
-
-        // content
-        decoration
-            .Content()
-            .column(column =>
+        
+        table.Header(header =>
+        {
+            header.Cell().Text("#", headerStyle);
+            header.Cell().Text("Product", headerStyle);
+            header.Cell().AlignRight().Text("Unit price", headerStyle);
+            header.Cell().AlignRight().Text("Quantity", headerStyle);
+            header.Cell().AlignRight().Text("Total", headerStyle);
+            
+            header.Cell().ColumnSpan(5)
+                  .PaddingVertical(5).BorderBottom(1).BorderColor(Colors.Black);
+        });
+        
+        foreach (var item in Model.Items)
+        {
+            table.Cell().Element(CellStyle).Text(Model.Items.IndexOf(item) + 1);
+            table.Cell().Element(CellStyle).Text(item.Name);
+            table.Cell().Element(CellStyle).AlignRight().Text($"{item.Price}$");
+            table.Cell().Element(CellStyle).AlignRight().Text(item.Quantity);
+            table.Cell().Element(CellStyle).AlignRight().Text($"{item.Price * item.Quantity}$");
+            
+            static IContainer CellStyle(IContainer container)
            {
-                foreach (var item in Model.Items)
-                {
-                    column
-                    .Item()
-                    .ShowEntire()
-                    .BorderBottom(1)
-                    .BorderColor(Colors.Grey.Lighten2)
-                    .Padding(5)
-                    .Row(row => 
-                    {
-                        row.ConstantColumn(25).Text(Model.Items.IndexOf(item) + 1);
-                        row.RelativeColumn(3).Text(item.Name);
-                        row.RelativeColumn().AlignRight().Text($"{item.Price}$");
-                        row.RelativeColumn().AlignRight().Text(item.Quantity);
-                        row.RelativeColumn().AlignRight().Text($"{item.Price * item.Quantity}$");
-                    });
-                }
-            });
+                container.BorderBottom(1).BorderColor(Colors.Grey.Lighten2).PaddingVertical(5);
+            }
+        }
    });
 }
 ```
@@ -1,4 +1,4 @@
- Added a `ScaleToFit` element - scales its child down so it fits in the provided space,
+- Added a `ScaleToFit` element - scales its child down so it fits in the provided space,
 - Added a `StopPaging` element - when its child requires more than one page to fully render, only the first page is shown,
 - Added a 'LineVertical' and a 'LineHorizontal' elements - those will simplify your code a lot, there is no need to use the `Border` element anymore!
 - Renaming: the `Stack` element was renamed to the `Column` element,
@@ -2,37 +2,21 @@
  <img src="https://github.com/QuestPDF/example-invoice/raw/main/images/logo.svg" width="400px"> 
 </a>

-## Overview
+QuestPDF presents a new approach to PDF document generation. Unlike other libraries, it does not rely on the HTML-to-PDF conversion which in many cases is not reliable. Instead, it implements its own layouting engine that is optimized to cover all paging-related requirements. Then, everything is rendered using the SkiaSharp library (a Skia port for .NET, used in Chrome, Android, MAUI, etc.).

-**Rely on solid fundamentals** - This library is created specifically for designing and arranging document layouts, with full paging support.  Alternative solutions, such as HTML-based converters, are not designed for this purpose and therefore are often unpredictable and do not produce desired results.
-
-**Work with organized self-explanatory code** - The entire process of implementing PDF document, takes place in your code. Free yourself from slow visual designers and strange technological limitations. Follow simple yet highly effective approaches to create maintainable, high-quality code.
-
-**Compose simple components into complex documents** - Do you remember the feeling when your code just works? When your ideas are becoming real without any effort? Working with simple, easy to understand, self-explanatory and highly composable layout elements is the key here!
-
-**Create and reuse components** - Feel no fear of complex documents! Create custom, reusable components and divide the document's layout into easy to maintain pieces. Inject data to customize content and use slots to enhance composability. Decide how complex approaches your solution needs and follow the best path.
-
-**Prototype with ease** - We understand that document generation is often tricky and require multiple iterations. The library offers additional prototyping tools such as random text generator or image placeholder element. By following best practices, you can develop a document without having data.
-
-**Enjoy fast PDF generation** - QuestPDF is created upon SkiaSharp, a well-known graphical library, and converts your data into PDF documents. It offers a highly optimized layouting engine capable of generating over 1000 PDF files per minute per core. The entire process is thread-safe.
+I have designed this layouting engine with full paging support in mind. The document consists of many simple elements (e.g. border, background, image, text, padding, table, grid etc.) that are composed together to create more complex structures. This way, as a developer, you can understand the behaviour of every element and use them with full confidence. Additionally, the document and all its elements support paging functionality. For example, an element can be moved to the next page (if there is not enough space) or even be split between pages like table's rows.

 ## Support QuestPDF

-All great frameworks and libraries started from zero. Please help us to make QuestPDF a commonly known library and an obvious choice in case of generating PDF documents. It can be as easy as:
- Giving this repository a star ⭐ so more people will know about it,
- Observing 🤩 the library to know about each new realease,
- Trying our sample project to see how easy it is to create an invoice 📊,
- Sharing your thoughts 💬 with us and your colleagues,
- Simply using it 👨‍💻 and suggesting new features,
- Creating new features 🆕 for everybody.
+All great frameworks and libraries started from zero. Please help me make QuestPDF a commonly known library and an obvious choice in case of generating PDF documents. Please give it a start ⭐ and share with your colleagues 💬👨‍💻.

 ## Installation

 The library is available as a nuget package. You can install it as any other nuget package from your IDE, try to search by `QuestPDF`. You can find package details [on this webpage](https://www.nuget.org/packages/QuestPDF/).

-<a href="https://www.nuget.org/packages/QuestPDF/">
-  <img src="https://github.com/QuestPDF/example-invoice/raw/main/images/nuget.svg" width="200px">  
-</a>
+```
+Install-Package QuestPDF
+```

 ## Documentation

@@ -174,14 +158,16 @@ void ComposeTable(IContainer container)
        
        foreach (var item in Model.Items)
        {
-            table.Cell().Text(Model.Items.IndexOf(item) + 1);
-            table.Cell().Text(item.Name);
-            table.Cell().AlignRight().Text($"{item.Price}$");
-            table.Cell().AlignRight().Text(item.Quantity);
-            table.Cell().AlignRight().Text($"{item.Price * item.Quantity}$");
+            table.Cell().Element(CellStyle).Text(Model.Items.IndexOf(item) + 1);
+            table.Cell().Element(CellStyle).Text(item.Name);
+            table.Cell().Element(CellStyle).AlignRight().Text($"{item.Price}$");
+            table.Cell().Element(CellStyle).AlignRight().Text(item.Quantity);
+            table.Cell().Element(CellStyle).AlignRight().Text($"{item.Price * item.Quantity}$");
            
-            table.Cell().ColumnSpan(5)
-                 .PaddingVertical(5).LineHorizontal(1).LineColor(Colors.Grey.Lighten2);
+            static IContainer CellStyle(IContainer container)
+            {
+                container.BorderBottom(1).BorderColor(Colors.Grey.Lighten2).PaddingVertical(5);
+            }
        }
    });
 }
Author	SHA1	Message	Date
MarcinZiabek	fdf8e3eb1a	Fixed text rendering corner case: measuring span with space at the end of the line may overflow available space	2022-03-08 18:33:34 +01:00
MarcinZiabek	69e268733c	2022.2.5	2022-02-18 23:31:53 +01:00
MarcinZiabek	657bbe2aac	2022.2.4	2022-02-18 21:48:57 +01:00
MarcinZiabek	63288dfb60	Updated examples	2022-02-07 22:29:59 +01:00
MarcinZiabek	fc325d8b76	2022.2.3	2022-02-07 22:25:48 +01:00
Marcin Ziąbek	5ffeaa3075	Merge pull request #119 from B-wareBS/features/unit-conversion-fix Fixed an issue with unit conversion.	2022-02-07 22:04:55 +01:00
Chris de Jong-Pobedinskiy	fe431fbc12	Fixed an issue with unit conversion. Fixed an issue where unit conversions from mm to pt would be off by a factor of 100. This fixes #118	2022-02-07 13:56:20 +01:00
Marcin Ziąbek	e0de408821	2022.2.2 Fixed regression: exception when Column/Row have no items	2022-02-01 23:39:43 +01:00
Marcin Ziąbek	8ce6afef5a	Simplified readme	2022-02-01 11:14:38 +01:00
Marcin Ziąbek	1c70b20028	Added examples for execution order	2022-01-31 00:15:10 +01:00
Marcin Ziąbek	3aef4ec4c9	2022.2.1	2022-01-30 23:46:11 +01:00
Marcin Ziąbek	3649607bd9	Merge remote-tracking branch 'origin/2022.02' # Conflicts: # QuestPDF.Examples/RowExamples.cs # QuestPDF.UnitTests/RowTests.cs # QuestPDF/Elements/Row.cs # QuestPDF/Fluent/RowExtensions.cs # QuestPDF/QuestPDF.csproj # QuestPDF/Resources/ReleaseNotes.txt	2022-01-30 23:44:20 +01:00
Marcin Ziąbek	ba409a8712	Create codeql-analysis.yml	2022-01-21 03:11:22 +01:00
Marcin Ziąbek	e3ce194fd1	Simple SVG example	2022-01-16 17:03:01 +01:00
Marcin Ziąbek	9b892c86ed	2022.1.0	2022-01-10 02:43:58 +01:00
Marcin Ziąbek	c9833d410d	2022.1.0-beta6	2022-01-09 03:08:18 +01:00
Marcin Ziąbek	763fdfac0f	Row: fixed paging behavior, Table: improved paging behavior for already rendered elements	2022-01-07 13:15:27 +01:00