// 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.Collections.Generic;
using System.Collections.ObjectModel;
using System.Text;
using System.Windows;
using System.Windows.Automation;
using System.Windows.Controls;
using System.Windows.Documents;
 
namespace Microsoft.VisualStudio.LanguageServices.Utilities;
 
internal class BindableTextBlock : TextBlock
{
    public IList<Inline> InlineCollection
    {
        get { return (ObservableCollection<Inline>)GetValue(InlineListProperty); }
        set { SetValue(InlineListProperty, value); }
    }
 
    public static readonly DependencyProperty InlineListProperty =
        DependencyProperty.Register(nameof(InlineCollection), typeof(IList<Inline>), typeof(BindableTextBlock), new UIPropertyMetadata(null, OnPropertyChanged));
 
    private static void OnPropertyChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
    {
        var textBlock = (BindableTextBlock)sender;
        var newList = (IList<Inline>)e.NewValue;
 
        textBlock.Inlines.Clear();
 
        if (newList is null)
        {
            return;
        }
 
        var automationTextBuilder = new StringBuilder();
 
        foreach (var inline in newList)
        {
            textBlock.Inlines.Add(inline);
            automationTextBuilder.Append(inline.GetText());
        }
 
        AutomationProperties.SetName(textBlock, automationTextBuilder.ToString());
    }
}