Ported notifications component from 7.x

components/Notifications/OpenSolution.bat

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+@ECHO OFF
+
+powershell ..\..\tooling\ProjectHeads\GenerateSingleSampleHeads.ps1 -componentPath %CD% %*

components/Notifications/src/Adaptive/AdaptiveGroup.cs

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+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.Collections.Generic;
+using CommunityToolkit.Notifications.Adaptive.Elements;
+
+namespace CommunityToolkit.Notifications
+{
+    /// <summary>
+    /// Groups semantically identify that the content in the group must either be displayed as a whole, or not displayed if it cannot fit. Groups also allow creating multiple columns. Supported on Tiles since RTM. Supported on Toasts since Anniversary Update.
+    /// </summary>
+    public sealed class AdaptiveGroup : ITileBindingContentAdaptiveChild, IAdaptiveChild, IToastBindingGenericChild
+    {
+        /// <summary>
+        /// Gets the only valid children of groups are <see cref="AdaptiveSubgroup"/>.
+        /// Each subgroup is displayed as a separate vertical column. Note that you must
+        /// include at least one subgroup in your group, otherwise an <see cref="InvalidOperationException"/>
+        /// will be thrown when you try to retrieve the XML for the notification.
+        /// </summary>
+        public IList<AdaptiveSubgroup> Children { get; private set; } = new List<AdaptiveSubgroup>();
+
+        internal Element_AdaptiveGroup ConvertToElement()
+        {
+            if (Children.Count == 0)
+            {
+                throw new InvalidOperationException("Groups must have at least one child subgroup. The Children property had zero items in it.");
+            }
+
+            Element_AdaptiveGroup group = new Element_AdaptiveGroup();
+
+            foreach (var subgroup in Children)
+            {
+                group.Children.Add(subgroup.ConvertToElement());
+            }
+
+            return group;
+        }
+    }
+}

components/Notifications/src/Adaptive/AdaptiveHelper.cs

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+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+
+namespace CommunityToolkit.Notifications.Adaptive
+{
+    internal static class AdaptiveHelper
+    {
+        internal static object ConvertToElement(object obj)
+        {
+            if (obj is AdaptiveText)
+            {
+                return (obj as AdaptiveText).ConvertToElement();
+            }
+
+            if (obj is AdaptiveImage)
+            {
+                return (obj as AdaptiveImage).ConvertToElement();
+            }
+
+            if (obj is AdaptiveGroup)
+            {
+                return (obj as AdaptiveGroup).ConvertToElement();
+            }
+
+            if (obj is AdaptiveSubgroup)
+            {
+                return (obj as AdaptiveSubgroup).ConvertToElement();
+            }
+
+            if (obj is AdaptiveProgressBar)
+            {
+                return (obj as AdaptiveProgressBar).ConvertToElement();
+            }
+
+            throw new NotImplementedException("Unknown object: " + obj.GetType());
+        }
+    }
+}

components/Notifications/src/Adaptive/AdaptiveImage.cs

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+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using CommunityToolkit.Notifications.Adaptive.Elements;
+
+namespace CommunityToolkit.Notifications
+{
+    /// <summary>
+    /// An inline image.
+    /// </summary>
+    public sealed class AdaptiveImage
+        : IBaseImage,
+        IToastBindingGenericChild,
+        ITileBindingContentAdaptiveChild,
+        IAdaptiveChild,
+        IAdaptiveSubgroupChild
+    {
+        /// <summary>
+        /// Gets or sets the desired cropping of the image.
+        /// Supported on Tiles since RTM. Supported on Toast since Anniversary Update.
+        /// </summary>
+        public AdaptiveImageCrop HintCrop { get; set; }
+
+        /// <summary>
+        /// Gets or sets a value whether a margin is removed. images have an 8px margin around them.
+        /// You can remove this margin by setting this property to true.
+        /// Supported on Tiles since RTM. Supported on Toast since Anniversary Update.
+        /// </summary>
+        public bool? HintRemoveMargin { get; set; }
+
+        /// <summary>
+        /// Gets or sets the horizontal alignment of the image.
+        /// For Toast, this is only supported when inside an <see cref="AdaptiveSubgroup"/>.
+        /// </summary>
+        public AdaptiveImageAlign HintAlign { get; set; }
+
+        private string _source;
+
+        /// <summary>
+        /// Gets or sets the URI of the image (Required).
+        /// Can be from your application package, application data, or the internet.
+        /// Internet images must be less than 200 KB in size.
+        /// </summary>
+        public string Source
+        {
+            get { return _source; }
+            set { BaseImageHelper.SetSource(ref _source, value); }
+        }
+
+        /// <summary>
+        /// Gets or sets a description of the image, for users of assistive technologies.
+        /// </summary>
+        public string AlternateText { get; set; }
+
+        /// <summary>
+        /// Gets or sets set to true to allow Windows to append a query string to the image URI
+        /// supplied in the Tile notification. Use this attribute if your server hosts
+        /// images and can handle query strings, either by retrieving an image variant based
+        /// on the query strings or by ignoring the query string and returning the image
+        /// as specified without the query string. This query string specifies scale,
+        /// contrast setting, and language.
+        /// </summary>
+        public bool? AddImageQuery { get; set; }
+
+        /// <summary>
+        /// Returns the image's source string.
+        /// </summary>
+        /// <returns>The image's source string.</returns>
+        public override string ToString()
+        {
+            if (Source == null)
+            {
+                return "Source is null";
+            }
+
+            return Source;
+        }
+
+        internal Element_AdaptiveImage ConvertToElement()
+        {
+            Element_AdaptiveImage image = BaseImageHelper.CreateBaseElement(this);
+
+            image.Crop = HintCrop;
+            image.RemoveMargin = HintRemoveMargin;
+            image.Align = HintAlign;
+            image.Placement = AdaptiveImagePlacement.Inline;
+
+            return image;
+        }
+    }
+}

components/Notifications/src/Adaptive/AdaptiveImageEnums.cs

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+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace CommunityToolkit.Notifications
+{
+    /// <summary>
+    /// Specifies the horizontal alignment for an image.
+    /// </summary>
+    public enum AdaptiveImageAlign
+    {
+        /// <summary>
+        /// Default value, alignment behavior determined by renderer.
+        /// </summary>
+        Default,
+
+        /// <summary>
+        /// Image stretches to fill available width (and potentially available height too, depending on where the image is).
+        /// </summary>
+        Stretch,
+
+        /// <summary>
+        /// Align the image to the left, displaying the image at its native resolution.
+        /// </summary>
+        Left,
+
+        /// <summary>
+        /// Align the image in the center horizontally, displaying the image at its native resolution.
+        /// </summary>
+        Center,
+
+        /// <summary>
+        /// Align the image to the right, displaying the image at its native resolution.
+        /// </summary>
+        Right
+    }
+
+    /// <summary>
+    /// Specify the desired cropping of the image.
+    /// </summary>
+    public enum AdaptiveImageCrop
+    {
+        /// <summary>
+        /// Default value, cropping behavior determined by renderer.
+        /// </summary>
+        Default,
+
+        /// <summary>
+        /// Image is not cropped.
+        /// </summary>
+        None,
+
+        /// <summary>
+        /// Image is cropped to a circle shape.
+        /// </summary>
+        Circle
+    }
+}

components/Notifications/src/Adaptive/AdaptiveProgressBar.cs

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+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+#pragma warning disable SA1121 // UseBuiltInTypeAlias
+
+using System;
+using CommunityToolkit.Notifications.Adaptive.Elements;
+using BindableProgressBarValue = CommunityToolkit.Notifications.BindableProgressBarValue;
+using BindableString = CommunityToolkit.Notifications.BindableString;
+
+namespace CommunityToolkit.Notifications
+{
+    /// <summary>
+    /// New in Creators Update: A progress bar. Only supported on toasts on Desktop, build 15007 or newer.
+    /// </summary>
+    public sealed class AdaptiveProgressBar : IToastBindingGenericChild
+    {
+        /// <summary>
+        /// Gets or sets an optional title string. Supports data binding.
+        /// </summary>
+        public BindableString Title { get; set; }
+
+        /// <summary>
+        /// Gets or sets the value of the progress bar. Supports data binding. Defaults to 0.
+        /// </summary>
+        public BindableProgressBarValue Value { get; set; } = AdaptiveProgressBarValue.FromValue(0);
+
+        /// <summary>
+        /// Gets or sets an optional string to be displayed instead of the default percentage string. If this isn't provided, something like "70%" will be displayed.
+        /// </summary>
+        public BindableString ValueStringOverride { get; set; }
+
+        /// <summary>
+        /// Gets or sets a status string (Required), which is displayed underneath the progress bar. This string should reflect the status of the operation, like "Downloading..." or "Installing..."
+        /// </summary>
+        public BindableString Status { get; set; }
+
+        internal Element_AdaptiveProgressBar ConvertToElement()
+        {
+            // If Value not provided, we use 0
+            var val = Value;
+            if (val == null)
+            {
+                val = AdaptiveProgressBarValue.FromValue(0);
+            }
+
+            var answer = new Element_AdaptiveProgressBar();
+
+            answer.Title = Title?.ToXmlString();
+            answer.Value = val.ToXmlString();
+            answer.ValueStringOverride = ValueStringOverride?.ToXmlString();
+            answer.Status = Status?.ToXmlString();
+
+            if (answer.Status == null)
+            {
+                throw new NullReferenceException("Status property is required.");
+            }
+
+            return answer;
+        }
+    }
+}