Show progress message on progress bar

src/Markdowser/Processing/ProcessingProgress.cs

@@ -1,10 +1,12 @@
 namespace Markdowser.Processing;
 
-public readonly struct ProcessingProgress(long current, long total, string? message = null)
+public readonly struct ProcessingProgress(long current, long total, string? message = null, bool isBytes = false)
 {
     public long Current { get; } = current;
     public long Total { get; } = total;
     public string? Message { get; } = message;
 
-    public int Percentage => (int)((double)Total / Current * 100);
+    public bool IsBytes { get; } = isBytes;
+
+    public int Percentage => (int)((double)Current / Total * 100);
 }

src/Markdowser/Processing/Processors/HtmlProcessor.cs

@@ -49,7 +49,7 @@ internal partial class HtmlProcessor : IContentProcessor
         {
             _ = html.AppendLine(await streamReader.ReadLineAsync());
 
-            progress.Report(new ProcessingProgress(length, contentStream.Position));
+            progress.Report(new ProcessingProgress(contentStream.Position, length));
         }
 
         HtmlDocument htmlDoc = new HtmlDocument();

src/Markdowser/Utilities/BytesToString.cs

@@ -0,0 +1,50 @@
+using System;
+using System.Globalization;
+
+namespace Markdowser.Utilities;
+
+internal static class BytesToString
+{
+    public static string Convert(long value)
+    {
+        string suffix;
+        double readable;
+        switch (Math.Abs(value))
+        {
+            case >= 0x1000000000000000:
+                suffix = "EiB";
+                readable = value >> 50;
+                break;
+
+            case >= 0x4000000000000:
+                suffix = "PiB";
+                readable = value >> 40;
+                break;
+
+            case >= 0x10000000000:
+                suffix = "TiB";
+                readable = value >> 30;
+                break;
+
+            case >= 0x40000000:
+                suffix = "GiB";
+                readable = value >> 20;
+                break;
+
+            case >= 0x100000:
+                suffix = "MiB";
+                readable = value >> 10;
+                break;
+
+            case >= 0x400:
+                suffix = "KiB";
+                readable = value;
+                break;
+
+            default:
+                return value.ToString("0 B");
+        }
+
+        return (readable / 1024).ToString("0.00 ", CultureInfo.InvariantCulture) + suffix;
+    }
+}

src/Markdowser/ViewModels/MainWindowViewModel.cs

@@ -31,7 +31,9 @@ public partial class MainWindowViewModel : ViewModelBase
     private WindowState windowState;
     private bool showSidePanel;
     private bool isBusy;
-    private int progress;
+    private double progress;
+    private double progressMax;
+    private string progressText;
     public ObservableCollection<TabItem> Tabs { get; } = [new TabItem() { Header = "New Tab" }];
 
     public TabItem CurrentTab
@@ -108,7 +110,7 @@ public partial class MainWindowViewModel : ViewModelBase
         set => this.RaiseAndSetIfChanged(ref isBusy, value);
     }
 
-    public int Progress
+    public double Progress
     {
         get => progress;
         set
@@ -118,6 +120,18 @@ public partial class MainWindowViewModel : ViewModelBase
         }
     }
 
+    public double ProgressMax
+    {
+        get => progressMax;
+        set => _ = this.RaiseAndSetIfChanged(ref progressMax, value);
+    }
+
+    public string ProgressText
+    {
+        get => progressText;
+        set => this.RaiseAndSetIfChanged(ref progressText, value);
+    }
+
     public SettingsViewModel SettingsViewModel => new SettingsViewModel();
     public bool CloseTabEnabled => Tabs.Count > 1;
     public bool BackEnabled => CurrentTabState.BackHistory.Count > 0;
@@ -205,6 +219,7 @@ public partial class MainWindowViewModel : ViewModelBase
 
         contentProcessorManager.RegisterProcessor(new HtmlProcessor());
         contentProcessorManager.RegisterProcessor(new CommonImageProcessor());
+        contentProcessorManager.RegisterProcessor(new DownloadProcessor());
 
         GlobalState.ThemeChanged += (s, e) =>
         {
@@ -276,7 +291,7 @@ public partial class MainWindowViewModel : ViewModelBase
                 }
                 else
                 {
-                    HttpResponseMessage httpResponseMessage = await httpClient.GetAsync(Url);
+                    HttpResponseMessage httpResponseMessage = await httpClient.GetAsync(Url, HttpCompletionOption.ResponseHeadersRead);
 
                     string? newUrl = httpResponseMessage.RequestMessage?.RequestUri?.ToString();
                     string oldUrl = Url;
@@ -300,8 +315,10 @@ public partial class MainWindowViewModel : ViewModelBase
                         return;
                     }
 
-                    Content = await contentProcessorManager.ProcessContent(httpResponseMessage, new Progress<ProcessingProgress>(p => Progress = p.Percentage));
+                    Content = await contentProcessorManager.ProcessContent(httpResponseMessage, new Progress<ProcessingProgress>(UpdateProgress));
 
+                    if (Content.Cacheable)
+                    {
                         if (oldUrl != Url)
                         {
                             cacheService.Set(oldUrl, Content);
@@ -309,6 +326,7 @@ public partial class MainWindowViewModel : ViewModelBase
 
                         cacheService.Set(Url, Content);
                     }
+                }
 
                 Dispatcher.UIThread.Post(() => CurrentTab.Header = Content.Title);
 
@@ -354,6 +372,21 @@ public partial class MainWindowViewModel : ViewModelBase
         });
     }
 
+    private void UpdateProgress(ProcessingProgress progress)
+    {
+        Progress = progress.Current;
+        ProgressMax = progress.Total;
+
+        if (progress.IsBytes)
+        {
+            ProgressText = $"{progress.Message} ({{1:0}}%) {BytesToString.Convert((long)Progress)}/{BytesToString.Convert((long)ProgressMax)}";
+        }
+        else
+        {
+            ProgressText = $"{progress.Message} ({{1:0}}%) {{0}}/{{3}}";
+        }
+    }
+
     private void UrlChanged(object? sender, EventArgs e)
     {
         this.RaisePropertyChanged(nameof(ForwardEnabled));

src/Markdowser/Views/MainWindow.axaml

@@ -114,7 +114,7 @@
                         </TextBox.Styles>
                     </TextBox>
 
-                    <ProgressBar IsVisible="{Binding IsBusy}" IsIndeterminate="{Binding ProgressIndeterminate}" ShowProgressText="{Binding !ProgressIndeterminate}" Maximum="100" Height="32" Grid.Row="2" Value="{Binding Progress}" />
+                    <ProgressBar IsVisible="{Binding IsBusy}" IsIndeterminate="{Binding ProgressIndeterminate}" ShowProgressText="{Binding !ProgressIndeterminate}" ProgressTextFormat="{Binding ProgressText}" Height="32" Grid.Row="2" Value="{Binding Progress}" Maximum="{Binding ProgressMax}" />
                 </Grid>
 
                 <Button Grid.Column="5" Command="{Binding ToggleSidePanel}" HorizontalAlignment="Right" i:Attached.Icon="fa-solid fa-table-columns" />