Add basic content processing structure

src/Markdowser/GlobalSuppressions.cs

@@ -8,3 +8,4 @@ using System.Diagnostics.CodeAnalysis;
 [assembly: SuppressMessage("Minor Code Smell", "S1075:URIs should not be hardcoded", Justification = "<Pending>")]
 [assembly: SuppressMessage("Minor Code Smell", "CS0067:The event 'ChangeThemeCommand.CanExecuteChanged' is never used", Justification = "<Pending>", Scope = "member", Target = "~N:Markdowser.Commands")]
 [assembly: SuppressMessage("Performance", "CA1822:Mark members as static", Justification = "<Pending>")]
+[assembly: SuppressMessage("Minor Code Smell", "S3267:Loops should be simplified with \"LINQ\" expressions", Justification = "<Pending>", Scope = "member", Target = "~M:Markdowser.Processing.ContentProcessorManager.ProcessContent(System.Net.HttpWebResponse,System.IProgress{Markdowser.Processing.ProcessingProgress})~Markdowser.ViewModels.ContentViewModelBase")]

src/Markdowser/Markdowser.csproj

@@ -37,4 +37,9 @@
     <PackageReference Include="ReverseMarkdown" Version="4.3.0" />
     <PackageReference Include="Semi.Avalonia" Version="11.0.7.1" />
   </ItemGroup>
+
+  <ItemGroup>
+    <Folder Include="Processing\Processors\" />
+    <Folder Include="Views\Content\" />
+  </ItemGroup>
 </Project>

src/Markdowser/Processing/ContentProcessor.cs

@@ -0,0 +1,24 @@
+using Markdowser.ViewModels;
+
+using System;
+using System.Collections.Generic;
+using System.Net;
+using System.Threading.Tasks;
+
+namespace Markdowser.Processing;
+
+internal class ContentProcessorManager
+{
+    private readonly List<IContentProcessor> processors = [];
+
+    public void RegisterProcessor(IContentProcessor processor)
+    {
+        processors.Add(processor);
+    }
+
+    public Task<ContentViewModelBase> ProcessContent(HttpWebResponse response, IProgress<ProcessingProgress> progress)
+    {
+        IContentProcessor? processor = processors.Find(processor => processor.CanProcess(response)) ?? throw new InvalidOperationException("No processor found for the given response.");
+        return processor.Process(response, progress);
+    }
+}

src/Markdowser/Processing/IContentProcessor.cs

@@ -0,0 +1,14 @@
+using Markdowser.ViewModels;
+
+using System;
+using System.Net;
+using System.Threading.Tasks;
+
+namespace Markdowser.Processing;
+
+internal interface IContentProcessor
+{
+    bool CanProcess(HttpWebResponse response);
+
+    Task<ContentViewModelBase> Process(HttpWebResponse response, IProgress<ProcessingProgress> progress);
+}

src/Markdowser/Processing/ProcessingProgress.cs

@@ -0,0 +1,9 @@
+namespace Markdowser.Processing;
+
+public readonly struct ProcessingProgress(int current, int total)
+{
+    public int Current { get; } = current;
+    public int Total { get; } = total;
+
+    public double Percentage => (double)Current / Total * 100;
+}

src/Markdowser/Utilities/ColumnDefinition.cs

@@ -13,7 +13,7 @@ internal static class ColumnDefinition
         }
         else if (!visibility)
         {
-            _ = element.SetValue(LastWidthProperty, element.GetValue(Avalonia.Controls.ColumnDefinition.WidthProperty));
+            _ = element.SetValue(LastWidthProperty!, element.GetValue(Avalonia.Controls.ColumnDefinition.WidthProperty));
             _ = element.SetValue(Avalonia.Controls.ColumnDefinition.WidthProperty, ZeroWidth);
         }
         return visibility;

src/Markdowser/ViewModels/Content/MarkdownContentViewModel.cs

@@ -0,0 +1,6 @@
+namespace Markdowser.ViewModels.Content;
+
+public class MarkdownContentViewModel(string title, string markdown) : ContentViewModelBase(title)
+{
+    public string Markdown { get; } = markdown;
+}

src/Markdowser/ViewModels/ContentViewModelBase.cs

@@ -0,0 +1,6 @@
+namespace Markdowser.ViewModels;
+
+public abstract class ContentViewModelBase(string title)
+{
+    public string Title { get; } = title;
+}

src/Markdowser/ViewModels/MainWindowViewModel.cs

@@ -35,7 +35,6 @@ public partial class MainWindowViewModel : ViewModelBase
     private bool isBusy;
     private int progress;
     public ObservableCollection<TabItem> Tabs => GlobalState.Tabs;
-    public string Title => $"{nameof(Markdowser)} - {Assembly.GetExecutingAssembly().GetName().Version?.ToString()}";
 
     public TabItem CurrentTab
     {
@@ -178,6 +177,8 @@ public partial class MainWindowViewModel : ViewModelBase
 
         GlobalState.ContentReload += (sender, _) =>
         {
+            // Updatre icon when dark mode changes
+            this.RaisePropertyChanged(nameof(Icon));
             this.RaisePropertyChanged(nameof(Content));
         };
     }

src/Markdowser/ViewModels/ViewModelBase.cs

@@ -1,6 +1,17 @@
-using ReactiveUI;
+using Avalonia.Controls;
+using Avalonia.Platform;
+
+using Markdowser.Models;
+
+using ReactiveUI;
+
+using System.Reflection;
 
 namespace Markdowser.ViewModels;
+
 public class ViewModelBase : ReactiveObject
 {
+    public string Title => $"{nameof(Markdowser)} - {Assembly.GetExecutingAssembly().GetName().Version?.ToString()}";
+
+    public WindowIcon Icon => Settings.Current.DarkMode ? new WindowIcon(AssetLoader.Open(new("avares://Markdowser/Assets/Markdowser-Dark-Transparent.ico"))) : new WindowIcon(AssetLoader.Open(new("avares://Markdowser/Assets/Markdowser-Light-Transparent.ico")));
 }

src/Markdowser/Views/MainWindow.axaml

@@ -11,7 +11,7 @@
         mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
         x:Class="Markdowser.Views.MainWindow"
         x:DataType="vm:MainWindowViewModel"
-        Icon="/Assets/Markdowser-Light-Transparent.ico"
+        Icon="{Binding Icon}"
         Title="{Binding Title}">
 
     <Design.DataContext>