FeedCenter/Application/MainWindow/FeedList.cs

using ChrisKaczor.InstalledBrowsers;
using FeedCenter.Properties;
using System;
using System.Linq;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;

namespace FeedCenter;

public partial class MainWindow
{
    private void HandleLinkTextListMouseUp(object sender, MouseButtonEventArgs e)
    {
        switch (e.ChangedButton)
        {
            case MouseButton.XButton1:

                if (PreviousToolbarButton.IsEnabled)
                    PreviousFeed();

                break;

            case MouseButton.XButton2:

                if (NextToolbarButton.IsEnabled)
                    NextFeed();

                break;
        }
    }

    private async void HandleItemMouseUp(object sender, MouseButtonEventArgs e)
    {
        // Only handle the middle button
        if (e.ChangedButton != MouseButton.Middle)
            return;

        // Get the feed item
        var feedItem = (Feeds.FeedItem) ((ListBoxItem) sender).DataContext;

        // Remove the item from the list
        LinkTextList.Items.Remove(feedItem);

        // The feed item has been read and is no longer new
        await feedItem.MarkAsRead(_database);
    }

    private async void HandleItemMouseDoubleClick(object sender, MouseButtonEventArgs e)
    {
        // Get the feed item
        var feedItem = (Feeds.FeedItem) ((ListBoxItem) sender).DataContext;

        // Try to open the item link
        if (!InstalledBrowser.OpenLink(Settings.Default.Browser, feedItem.Link))
            return;

        // Remove the item from the list
        LinkTextList.Items.Remove(feedItem);

        // The feed item has been read and is no longer new
        await feedItem.MarkAsRead(_database);
    }

    private void HandleFeedButtonClick(object sender, RoutedEventArgs e)
    {
        // Create a new context menu
        var contextMenu = new ContextMenu();

        // Loop over each feed
        foreach (var feed in _feedList.OrderBy(feed => feed.Name))
        {
            // Build a string to display the feed name and the unread count
            var display = $"{feed.Name} ({feed.Items.Count(item => !item.BeenRead):d})";

            // Create a menu item
            var menuItem = new MenuItem
            {
                Header = display,
                Tag = feed,

                // Set the current item to bold
                FontWeight = feed.Id == _currentFeed.Id ? FontWeights.Bold : FontWeights.Normal
            };

            // Handle the click
            menuItem.Click += HandleFeedMenuItemClick;

            // Add the item to the list
            contextMenu.Items.Add(menuItem);
        }

        // Set the context menu placement to this button
        contextMenu.PlacementTarget = this;

        // Open the context menu
        contextMenu.IsOpen = true;
    }

    private void HandleFeedMenuItemClick(object sender, RoutedEventArgs e)
    {
        // Get the menu item clicked
        var menuItem = (MenuItem) sender;

        // Get the feed from the menu item tab
        var feed = (Feeds.Feed) menuItem.Tag;

        // Loop over all feeds and look for the index of the new one		
        var feedIndex = 0;
        foreach (var loopFeed in _feedList.OrderBy(loopFeed => loopFeed.Name))
        {
            if (loopFeed.Id == feed.Id)
            {
                _feedIndex = feedIndex;
                break;
            }

            feedIndex++;
        }

        // Set the current feed
        _currentFeed = feed;

        // Update the feed timestamp
        _lastFeedDisplay = DateTime.Now;

        // Update the display
        DisplayFeed();
    }
}