General concept of RTL support

QuestPDF.Examples/TextShapingTests.cs

@@ -8,58 +8,8 @@ namespace QuestPDF.Examples
 {
     public class TextShapingTests
     {
-        // [Test]
-        // public void ShapeText()
-        // {
-        //     using var textPaint = new SKPaint
-        //     {
-        //         Color = SKColors.Black,
-        //         Typeface = SKTypeface.CreateDefault(),
-        //         IsAntialias = true,
-        //         TextSize = 20
-        //     };
-        //
-        //     using var backgroundPaint = new SKPaint
-        //     {
-        //         Color = SKColors.LightGray
-        //     };
-        //
-        //     RenderingTest
-        //         .Create()
-        //         .PageSize(550, 250)
-        //         .ProduceImages()
-        //         .ShowResults()
-        //         .Render(container =>
-        //         {
-        //             //var lorem = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec odio ipsum, aliquam a neque a, lacinia vehicula lectus.";
-        //             //var arabic = "ينا الألم. في بعض الأحيان ونظراً للالتزامات التي يفرضها علينا الواجب والعمل سنتنازل غالباً ونرفض الشعور";
-        //
-        //             var lorem = "Lorem ipsum dolor sit amet, consectetur adipiscing elit.";
-        //             var arabic = "ينا الألم. في بعض الأحيان ونظراً للالتزامات التي يفرضها علينا";
-        //
-        //             var text = arabic;
-        //             var metrics = textPaint.FontMetrics;
-        //
-        //             container
-        //                 .Padding(25)
-        //                 .Canvas((canvas, space) =>
-        //                 {
-        //                     canvas.Translate(0, 20);
-        //
-        //                     var width = MeasureText(text, textPaint);
-        //                     var widthReal = textPaint.MeasureText(text);
-        //                     canvas.DrawRect(0, metrics.Descent, width, metrics.Ascent - metrics.Descent, backgroundPaint);
-        //
-        //                     canvas.DrawShapedText(text, 0, 0, textPaint);
-        //
-        //                     canvas.Translate(0, 40);
-        //                     canvas.DrawText(text, 0, 0, textPaint);
-        //                 });
-        //         });
-        // }
-
         [Test]
-        public void MeasureTest()
+        public void ShapeText()
         {
             using var textPaint = new SKPaint
             {
@@ -68,12 +18,30 @@ namespace QuestPDF.Examples
                 IsAntialias = true,
                 TextSize = 20
             };
-            
-            var lorem = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec odio ipsum, aliquam a neque a, lacinia vehicula lectus.";
-            var arabic = "ينا الألم. في بعض الأحيان ونظراً للالتزامات التي يفرضها علينا";
-            //            012345678901234567890123456789012345678901234567890123456
-            var shaper = new SKShaper(textPaint.Typeface);
-            var result = shaper.Shape(lorem, textPaint);
-        } 
+        
+            using var backgroundPaint = new SKPaint
+            {
+                Color = SKColors.LightGray
+            };
+        
+            RenderingTest
+                .Create()
+                .PageSize(550, 250)
+                .ProduceImages()
+                .ShowResults()
+                .Render(container =>
+                {
+                    //var lorem = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec odio ipsum, aliquam a neque a, lacinia vehicula lectus.";
+                    //var arabic = "ينا الألم. في بعض الأحيان ونظراً للالتزامات التي يفرضها علينا الواجب والعمل سنتنازل غالباً ونرفض الشعور";
+        
+                    var lorem = "Lorem ipsum dolor sit amet, consectetur adipiscing elit.";
+                    var arabic = "ينا الألم. في بعض (5000) الأحيان ونظراً للالتزامات التي يفرضها علينا";
+                    
+                    container
+                        .Padding(25)
+                        .Text(arabic)
+                        .FontSize(25);
+                });
+        }
     }
 }

QuestPDF.ReportSample/Layouts/StandardReport.cs

@@ -33,10 +33,11 @@ namespace QuestPDF.ReportSample.Layouts
                     page.MarginHorizontal(50);
                     
                     page.Size(PageSizes.A4);
+                    page.ContentDirectionRightToLeft();
                         
                     page.Header().Element(ComposeHeader);
                     page.Content().Element(ComposeContent);
-                    
+
                     page.Footer().AlignCenter().Text(text =>
                     {
                         text.CurrentPageNumber().Format(x => x?.FormatAsRomanNumeral() ?? "-----");

QuestPDF/Drawing/DocumentGenerator.cs

@@ -65,6 +65,7 @@ namespace QuestPDF.Drawing
             document.Compose(container);
             var content = container.Compose();
             ApplyDefaultTextStyle(content, TextStyle.LibraryDefault);
+            ApplyContentDirection(content);
             
             var metadata = document.GetMetadata();
             var pageContext = new PageContext();
@@ -199,5 +200,22 @@ namespace QuestPDF.Drawing
             foreach (var child in content.GetChildren())
                 ApplyDefaultTextStyle(child, targetTextStyle);
         }
+
+        internal static void ApplyContentDirection(this Element? content, ContentDirectionType contentDirectionType = ContentDirectionType.LeftToRight)
+        {
+            if (content == null)
+                return;
+
+            var targetDirection = contentDirectionType;
+
+            if (content is ContentDirection contentDirection)
+                targetDirection = contentDirection.Direction;
+
+            if (content is IContentDirectionAware contentDirectionAware)
+                contentDirectionAware.ContentDirection = targetDirection;
+            
+            foreach (var child in content.GetChildren())
+                ApplyContentDirection(child, targetDirection);
+        }
     }
 }

QuestPDF/Drawing/Proxy/DirectionProxy.cs

@@ -0,0 +1,9 @@
+using QuestPDF.Infrastructure;
+
+namespace QuestPDF.Drawing.Proxy
+{
+    internal class DirectionProxy : ContainerElement
+    {
+        
+    }
+}

QuestPDF/Drawing/TextShaper.cs

@@ -25,6 +25,7 @@ namespace QuestPDF.Drawing
             
             PopulateBufferWithText(buffer, text);
             buffer.GuessSegmentProperties();
+            //buffer.Direction = Direction.RightToLeft;
 
             Font.Shape(buffer);
             

QuestPDF/Elements/ContentDirection.cs

@@ -0,0 +1,9 @@
+using QuestPDF.Infrastructure;
+
+namespace QuestPDF.Elements
+{
+    internal class ContentDirection : ContainerElement
+    {
+        public ContentDirectionType Direction { get; set; }
+    }
+}

QuestPDF/Elements/Page.cs

@@ -19,6 +19,8 @@ namespace QuestPDF.Elements
         public float MarginBottom { get; set; }
 
         public string BackgroundColor { get; set; } = Colors.Transparent;
+
+        public ContentDirectionType ContentDirection { get; set; } = ContentDirectionType.LeftToRight;
         
         public Element Background { get; set; } = Empty.Instance;
         public Element Foreground { get; set; } = Empty.Instance;
@@ -30,6 +32,7 @@ namespace QuestPDF.Elements
         public void Compose(IContainer container)
         {
             container
+                .ContentDirection(ContentDirection)
                 .Background(BackgroundColor)
                 .Layers(layers =>
                 {

QuestPDF/Elements/Text/TextBlock.cs

@@ -8,11 +8,13 @@ using QuestPDF.Infrastructure;
 
 namespace QuestPDF.Elements.Text
 {
-    internal class TextBlock : Element, IStateResettable
+    internal class TextBlock : Element, IContentDirectionAware, IStateResettable
     {
         public HorizontalAlignment Alignment { get; set; } = HorizontalAlignment.Left;
         public List<ITextBlockItem> Items { get; set; } = new List<ITextBlockItem>();
 
+        public ContentDirectionType ContentDirection { get; set; }
+        
         public string Text => string.Join(" ", Items.Where(x => x is TextBlockSpan).Cast<TextBlockSpan>().Select(x => x.Text));
         
         private Queue<ITextBlockItem> RenderingQueue { get; set; }
@@ -69,8 +71,12 @@ namespace QuestPDF.Elements.Text
                 
                 Canvas.Translate(new Position(alignmentOffset, 0));
                 Canvas.Translate(new Position(0, -line.Ascent));
-            
-                foreach (var item in line.Elements)
+
+                var elements = ContentDirection == ContentDirectionType.LeftToRight
+                    ? line.Elements
+                    : line.Elements.Reverse();
+                
+                foreach (var item in elements)
                 {
                     var textDrawingRequest = new TextDrawingRequest
                     {

QuestPDF/Fluent/ContentDirectionExtensions.cs

@@ -0,0 +1,29 @@
+using System.Linq.Expressions;
+using QuestPDF.Elements;
+using QuestPDF.Infrastructure;
+
+namespace QuestPDF.Fluent
+{
+    public static class ContentDirectionExtensions
+    {
+        internal static IContainer ContentDirection(this IContainer element, ContentDirectionType contentDirectionType)
+        {
+            var contentDirection = new ContentDirection
+            {
+                Direction = contentDirectionType
+            };
+
+            return element.Element(contentDirection);
+        }
+        
+        public static IContainer ContentDirectionLeftToRight(this IContainer element)
+        {
+            return element.ContentDirection(ContentDirectionType.LeftToRight);
+        }
+        
+        public static IContainer ContentDirectionRightToLeft(this IContainer element)
+        {
+            return element.ContentDirection(ContentDirectionType.RightToLeft);
+        }
+    }
+} 

QuestPDF/Fluent/PageExtensions.cs

@@ -88,6 +88,16 @@ namespace QuestPDF.Fluent
             DefaultTextStyle(handler(TextStyle.Default));
         }
         
+        public void ContentDirectionLeftToRight()
+        {
+            Page.ContentDirection = ContentDirectionType.LeftToRight;
+        }
+        
+        public void ContentDirectionRightToLeft()
+        {
+            Page.ContentDirection = ContentDirectionType.RightToLeft;
+        }
+        
         public void PageColor(string color)
         {
             Page.BackgroundColor = color;

QuestPDF/Infrastructure/ContentDirectionType.cs

@@ -0,0 +1,8 @@
+namespace QuestPDF.Infrastructure
+{
+    public enum ContentDirectionType
+    {
+        LeftToRight,
+        RightToLeft
+    }
+}

QuestPDF/Infrastructure/HorizontalAlignment.cs

@@ -4,6 +4,9 @@ namespace QuestPDF.Infrastructure
     {
         Left,
         Center,
-        Right
+        Right,
+        
+        Start,
+        End
     }
 }

QuestPDF/Infrastructure/IContentDirectionAware.cs

@@ -0,0 +1,7 @@
+namespace QuestPDF.Infrastructure
+{
+    internal interface IContentDirectionAware
+    {
+        public ContentDirectionType ContentDirection { get; set; }
+    }
+}