[dotnet] Enhance PrintOptions class to support for predefined and custom Paper Sizes

Author: yvsvarma

dotnet/src/webdriver/PrintOptions.cs

@@ -50,12 +50,24 @@ public class PrintOptions
         private const double DefaultPageHeight = 21.59;
         private const double DefaultPageWidth = 27.94;
         private const double CentimetersPerInch = 2.54;
-
+        public static PageSize A4 { get; } = new PageSize { Width = 21.0, Height = 29.7 }; // cm
+        public static PageSize Legal { get; } = new PageSize { Width = 21.59, Height = 35.56 }; // cm
+        public static PageSize Letter { get; } = new PageSize { Width = 21.59, Height = 27.94 }; // cm
+        public static PageSize Tabloid { get; } = new PageSize { Width = 27.94, Height = 43.18 }; // cm
         private double scale = 1.0;
         private PageSize pageSize = new PageSize();
         private Margins margins = new Margins();
         private readonly HashSet<object> pageRanges = new HashSet<object>();
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PrintOptions"/> class with default values.
+        /// Default page size is set to A4.
+        /// </summary>
+        public PrintOptions()
+        {
+        this.PageDimensions = A4; // Default to A4 page size
+        }
+
         /// <summary>
         /// Gets or sets the orientation of the pages in the printed document.
         /// </summary>
@@ -99,6 +111,21 @@ public PageSize PageDimensions
             set => this.pageSize = value ?? throw new ArgumentNullException(nameof(value));
         }
 
+
+        /// <summary>
+        /// Sets the page size to a predefined or custom size.
+        /// </summary>
+        /// <param name="pageSize">The page size to set.</param>
+        /// <exception cref="ArgumentNullException">Thrown if pageSize is null.</exception>
+        public void SetPageSize(PageSize pageSize)
+        {
+            if (pageSize == null)
+            {
+                throw new ArgumentNullException(nameof(pageSize), "Page size cannot be null.");
+            }
+            this.PageDimensions = pageSize;
+        }
+
         /// <summary>
         /// Gets or sets the margins for each page in the doucment.
         /// </summary>

dotnet/test/common/PrintTest.cs

@@ -122,5 +122,56 @@ public void MarginsCannotHaveNegativeValues()
             Assert.That(() => new PrintOptions.Margins { Left = -1 }, Throws.TypeOf<ArgumentOutOfRangeException>());
             Assert.That(() => new PrintOptions.Margins { Right = -1 }, Throws.TypeOf<ArgumentOutOfRangeException>());
         }
+
+        [Test]
+        public void DefaultPageSizeIsA4()
+        {
+            var options = new PrintOptions();
+
+            Assert.That(options.PageDimensions.Width, Is.EqualTo(PrintOptions.A4.Width));
+            Assert.That(options.PageDimensions.Height, Is.EqualTo(PrintOptions.A4.Height));
+        }
+
+        [Test]
+        public void CanSetPredefinedPageSizes()
+        {
+            var options = new PrintOptions();
+
+            options.SetPageSize(PrintOptions.A4);
+            Assert.That(options.PageDimensions.Width, Is.EqualTo(PrintOptions.A4.Width));
+            Assert.That(options.PageDimensions.Height, Is.EqualTo(PrintOptions.A4.Height));
+
+            options.SetPageSize(PrintOptions.Legal);
+            Assert.That(options.PageDimensions.Width, Is.EqualTo(PrintOptions.Legal.Width));
+            Assert.That(options.PageDimensions.Height, Is.EqualTo(PrintOptions.Legal.Height));
+
+            options.SetPageSize(PrintOptions.Letter);
+            Assert.That(options.PageDimensions.Width, Is.EqualTo(PrintOptions.Letter.Width));
+            Assert.That(options.PageDimensions.Height, Is.EqualTo(PrintOptions.Letter.Height));
+
+            options.SetPageSize(PrintOptions.Tabloid);
+            Assert.That(options.PageDimensions.Width, Is.EqualTo(PrintOptions.Tabloid.Width));
+            Assert.That(options.PageDimensions.Height, Is.EqualTo(PrintOptions.Tabloid.Height));
+        }
+
+        [Test]
+        public void CanSetCustomPageSize()
+        {
+            var options = new PrintOptions();
+            var customPageSize = new PrintOptions.PageSize { Width = 25.0, Height = 30.0 };
+
+            options.SetPageSize(customPageSize);
+
+            Assert.That(options.PageDimensions.Width, Is.EqualTo(25.0));
+            Assert.That(options.PageDimensions.Height, Is.EqualTo(30.0));
+        }
+
+        [Test]
+        public void SettingPageSizeToNullThrowsException()
+        {
+            var options = new PrintOptions();
+            Assert.That(() => options.SetPageSize(null), Throws.InstanceOf<ArgumentNullException>());
+        }
+
     }
 }