From a0e0b0e1d5e90a816d30f67ff7667917268ddba1 Mon Sep 17 00:00:00 2001
From: tj-devel709 <tj.devel709@gmail.com>
Date: Thu, 21 Mar 2024 17:27:48 -0500
Subject: [PATCH] Add the resizing code for iOS 15 plus

---
 .../iOS/Extensions/ButtonExtensions.cs        | 71 +++++++++++++++++++
 1 file changed, 71 insertions(+)

diff --git a/src/Controls/src/Core/Platform/iOS/Extensions/ButtonExtensions.cs b/src/Controls/src/Core/Platform/iOS/Extensions/ButtonExtensions.cs
index 8f3a667eb022..82fc64569d47 100644
--- a/src/Controls/src/Core/Platform/iOS/Extensions/ButtonExtensions.cs
+++ b/src/Controls/src/Core/Platform/iOS/Extensions/ButtonExtensions.cs
@@ -2,6 +2,7 @@
 using System;
 using CoreGraphics;
 using Foundation;
+using Microsoft.Extensions.Logging;
 using Microsoft.Maui.Controls.Internals;
 using UIKit;
 using static Microsoft.Maui.Controls.Button;
@@ -229,6 +230,11 @@ public static void UpdateContentLayout(this UIButton platformButton, Button butt
 			else
 				platformButton.TitleLabel.Layer.Hidden = true;
 
+			if (config is UIButtonConfiguration)
+			{
+				ResizeImageIfNecessary(platformButton, button, image);
+			}
+
 			if (config is UIButtonConfiguration)
 			{
 				// If there is an image above or below the Title, the button will need to be redrawn the first time.
@@ -258,6 +264,71 @@ public static void UpdateContentLayout(this UIButton platformButton, Button butt
 			}
 		}
 
+		static void ResizeImageIfNecessary(UIButton platformButton, Button button, UIImage image)
+		{
+			nfloat availableHeight = 0;
+			nfloat availableWidth = 0;
+
+			if (platformButton.Bounds != CGRect.Empty
+				&& (button.Height != double.NaN || button.Width != double.NaN)
+				&& platformButton.Configuration is UIButtonConfiguration config
+				&& config.ContentInsets is NSDirectionalEdgeInsets contentInsets)
+			{
+				// Case where the image is on top or bottom of the Title text.
+				if (config.ImagePlacement == NSDirectionalRectEdge.Top || config.ImagePlacement == NSDirectionalRectEdge.Bottom)
+				{
+					availableHeight = platformButton.Bounds.Height - (contentInsets.Top + contentInsets.Bottom + config.ImagePadding + platformButton.GetTitleBoundingRect().Height);
+					availableWidth = platformButton.Bounds.Width - (contentInsets.Leading + contentInsets.Trailing);
+				}
+
+				// Case where the image is on the left or right of the Title text.
+				else
+				{
+					availableHeight = platformButton.Bounds.Height - (contentInsets.Top + contentInsets.Bottom);
+					availableWidth = platformButton.Bounds.Width - (contentInsets.Leading + contentInsets.Trailing + config.ImagePadding + platformButton.GetTitleBoundingRect().Width);
+				}
+			}
+
+			availableHeight = (nfloat)Math.Max(availableHeight, 0);
+			availableWidth = (nfloat)Math.Max(availableWidth, 0);
+
+			try
+			{
+				if (image.Size.Height > availableHeight || image.Size.Width > availableWidth)
+				{
+					image = ResizeImageSource(image, availableWidth, availableHeight);
+				}
+				else
+				{
+					return;
+				}
+
+				image = image?.ImageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal);
+
+				platformButton.SetImage(image, UIControlState.Normal);
+
+				platformButton.SetNeedsLayout();
+			}
+			catch (Exception)
+			{
+				button.Handler.MauiContext?.CreateLogger<ButtonHandler>()?.LogWarning("Can not load Button ImageSource");
+			}
+		}
+
+		static UIImage ResizeImageSource(UIImage sourceImage, nfloat maxWidth, nfloat maxHeight)
+		{
+			if (sourceImage is null || sourceImage.CGImage is null)
+				return null;
+
+			var sourceSize = sourceImage.Size;
+			float maxResizeFactor = (float)Math.Min(maxWidth / sourceSize.Width, maxHeight / sourceSize.Height);
+
+			if (maxResizeFactor > 1)
+				return sourceImage;
+
+			return UIImage.FromImage(sourceImage.CGImage, sourceImage.CurrentScale / maxResizeFactor, sourceImage.Orientation);
+		}
+
 		public static void UpdateText(this UIButton platformButton, Button button)
 		{
 			var text = TextTransformUtilites.GetTransformedText(button.Text, button.TextTransform);