Add F11 fullscreen functionality

src/Markdowser/ViewModels/MainWindowViewModel.cs

@@ -29,6 +29,7 @@ public partial class MainWindowViewModel : ViewModelBase
 
     private ContentViewModelBase content;
     private TabItem currentTab = null!;
+    private WindowState windowState;
     private bool showSidePanel;
     private bool isBusy;
     private int progress;
@@ -52,6 +53,12 @@ public partial class MainWindowViewModel : ViewModelBase
         }
     }
 
+    public WindowState WindowState
+    {
+        get => windowState;
+        set => this.RaiseAndSetIfChanged(ref windowState, value);
+    }
+
     public ContentViewModelBase Content
     {
         get => content;
@@ -143,6 +150,8 @@ public partial class MainWindowViewModel : ViewModelBase
         this.RaisePropertyChanged(nameof(CloseTabEnabled));
     });
 
+    public ICommand ToggleFullScreen => ReactiveCommand.Create(() => WindowState = WindowState == WindowState.FullScreen ? WindowState.Normal : WindowState.FullScreen);
+
     private MarkdownContentViewModel DefaultContent => new("New Tab", new StringBuilder()
         .AppendLine($"![Logo](avares://Markdowser/Assets/Markdowser-{(Settings.Current.DarkMode ? "Dark" : "Light")}-Transparent.png)")
         .AppendLine()

src/Markdowser/Views/MainWindow.axaml

@@ -11,7 +11,7 @@
         x:DataType="vm:MainWindowViewModel"
         Icon="{Binding Icon}"
         Title="{Binding Title}"
-        Loaded="Window_Loaded">
+        Loaded="Window_Loaded" WindowState="{Binding WindowState}">
 
     <Design.DataContext>
         <!-- This only sets the DataContext for the previewer in an IDE,
@@ -32,6 +32,7 @@
 
     <Window.KeyBindings>
         <KeyBinding Gesture="Ctrl+R" Command="{Binding Browse}" />
+        <KeyBinding Gesture="F5" Command="{Binding Browse}" />
         <KeyBinding Gesture="Alt+Home" Command="{StaticResource HomeCommand}" />
         <KeyBinding Gesture="Alt+H" Command="{StaticResource HomeCommand}" />
         <KeyBinding Gesture="Alt+Left" Command="{Binding Back}" />
@@ -39,6 +40,7 @@
         <KeyBinding Gesture="Ctrl+T" Command="{Binding NewTab}" />
         <KeyBinding Gesture="Ctrl+W" Command="{Binding CloseTab}" />
         <KeyBinding Gesture="Alt+S" Command="{Binding ToggleSidePanel}" />
+        <KeyBinding Gesture="F11" Command="{Binding ToggleFullScreen}" />
     </Window.KeyBindings>
 
     <Grid RowDefinitions="Auto, *, Auto">