Fix long-form markdown editor scrolling and focus

src/PostIt/PostIt.Tests/MD/le-chant-1.md

@@ -0,0 +1,34 @@
+
+    Loin vers l'infini s'étendent
+    Les grands prés marécageux .
+    Pas un seul oiseau ne chante
+    Sur les arbres secs et creux !
+
+*(Refrain)*
+
+    Ô terre de détresse,
+    Où nous devons sans cesse,
+    Piocher, piocher .
+
+    Dans ce camp morne et sauvage
+    Entouré de murs de fer,
+    Il nous semble vivre en cage
+    Au milieu d'un grand désert .
+
+    Bruit des pas et bruit des armes,
+    Sentinelles jours et nuits,
+    Et du sang, et des cris, des larmes,
+    La mort pour celui qui fuit .
+
+    Mais un jour dans notre vie,
+    Le printemps refleurira .
+    Liberté, liberté chérie
+    Je dirai : « Tu es à moi ! »
+
+*(Dernier refrain)*
+
+    Ô terre d'allégresse,
+    Où nous pourrons sans cesse,
+    Aimer, aimer !
+
+[audio : Mario Hacquard - Youtube](https://www.youtube.com/watch?v=ogw_mgk1pFs)

src/PostIt/PostIt/Controls/MarkdownEditorControl.axaml

@@ -0,0 +1,61 @@
+<UserControl
+    x:Class="PostIt.Controls.MarkdownEditorControl"
+    xmlns="https://github.com/avaloniaui"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:AvaloniaEdit="clr-namespace:AvaloniaEdit;assembly=AvaloniaEdit"
+    xmlns:md="using:MarkdownViewer.Core.Controls"
+    x:Name="Root"
+    HorizontalAlignment="Stretch"
+    VerticalAlignment="Stretch">
+    <Grid HorizontalAlignment="Stretch" VerticalAlignment="Stretch" MinHeight="260">
+        <Border
+            BorderBrush="LightGray"
+            BorderThickness="1"
+            CornerRadius="5"
+            IsVisible="{Binding !IsPreviewVisible, ElementName=Root}"
+            Padding="0"
+            MinHeight="260">
+            <ScrollViewer
+                BringIntoViewOnFocusChange="False"
+                HorizontalScrollBarVisibility="Disabled"
+                VerticalScrollBarVisibility="Auto"
+                HorizontalAlignment="Stretch"
+                VerticalAlignment="Stretch">
+                <AvaloniaEdit:TextEditor
+                    x:Name="SourceEditor"
+                    Document="{Binding Document, ElementName=Root, Mode=TwoWay}"
+                    FontFamily="Cascadia Code,Consolas,Menlo,Monospace"
+                    ShowLineNumbers="True"
+                    WordWrap="True"
+                    BorderThickness="0"
+                    Padding="5,5,5,15"
+                    HorizontalAlignment="Stretch"
+                    VerticalAlignment="Stretch"
+                    HorizontalScrollBarVisibility="Disabled"
+                    VerticalScrollBarVisibility="Auto"
+                    TextInputOptions.Multiline="True"
+                    TextInputOptions.ReturnKeyType="Default" />
+            </ScrollViewer>
+        </Border>
+
+        <Border
+            BorderBrush="LightGray"
+            BorderThickness="1"
+            CornerRadius="5"
+            IsVisible="{Binding IsPreviewVisible, ElementName=Root}"
+            Padding="8"
+            MinHeight="260">
+            <ScrollViewer
+                BringIntoViewOnFocusChange="False"
+                HorizontalScrollBarVisibility="Disabled"
+                VerticalScrollBarVisibility="Auto"
+                HorizontalAlignment="Stretch"
+                VerticalAlignment="Stretch">
+                <md:MarkdownViewer
+                    x:Name="PreviewViewer"
+                    MarkdownText="{Binding MarkdownText, ElementName=Root}"
+                    ClipToBounds="False" />
+            </ScrollViewer>
+        </Border>
+    </Grid>
+</UserControl>

src/PostIt/PostIt/Controls/MarkdownEditorControl.axaml.cs

@@ -0,0 +1,88 @@
+using System;
+using Avalonia;
+using Avalonia.Controls;
+using AvaloniaEdit.Document;
+
+namespace PostIt.Controls;
+
+public partial class MarkdownEditorControl : UserControl
+{
+    public static readonly StyledProperty<string?> MarkdownTextProperty =
+        AvaloniaProperty.Register<MarkdownEditorControl, string?>(nameof(MarkdownText));
+
+    public static readonly StyledProperty<TextDocument?> DocumentProperty =
+        AvaloniaProperty.Register<MarkdownEditorControl, TextDocument?>(nameof(Document));
+
+    public static readonly StyledProperty<bool> IsPreviewVisibleProperty =
+        AvaloniaProperty.Register<MarkdownEditorControl, bool>(nameof(IsPreviewVisible), false);
+
+    public string? MarkdownText
+    {
+        get => GetValue(MarkdownTextProperty);
+        set => SetValue(MarkdownTextProperty, value);
+    }
+
+    public TextDocument? Document
+    {
+        get => GetValue(DocumentProperty);
+        set => SetValue(DocumentProperty, value);
+    }
+
+    public bool IsPreviewVisible
+    {
+        get => GetValue(IsPreviewVisibleProperty);
+        set => SetValue(IsPreviewVisibleProperty, value);
+    }
+
+    public MarkdownEditorControl()
+    {
+        InitializeComponent();
+        PropertyChanged += OnPropertyChanged;
+        SizeChanged += OnSizeChanged;
+        UpdateEditorLimits();
+    }
+
+    private void OnPropertyChanged(object? sender, AvaloniaPropertyChangedEventArgs e)
+    {
+        if (e.Property == MarkdownTextProperty)
+        {
+            var text = e.NewValue as string ?? string.Empty;
+            if (Document is null || !string.Equals(Document.Text, text, StringComparison.Ordinal))
+            {
+                Document = new TextDocument(text);
+            }
+        }
+        else if (e.Property == DocumentProperty)
+        {
+            var newDocument = e.NewValue as TextDocument;
+            var text = newDocument?.Text ?? string.Empty;
+            if (!string.Equals(MarkdownText, text, StringComparison.Ordinal))
+            {
+                MarkdownText = text;
+            }
+        }
+    }
+
+    private void OnSizeChanged(object? sender, SizeChangedEventArgs e)
+    {
+        UpdateEditorLimits();
+    }
+
+    private void UpdateEditorLimits()
+    {
+        var visibleHeight = Bounds.Height > 0 ? Bounds.Height - 24 : 260;
+        visibleHeight = Math.Max(visibleHeight, 80);
+
+        if (SourceEditor is not null)
+        {
+            SourceEditor.MaxHeight = visibleHeight;
+            SourceEditor.Height = double.NaN;
+        }
+
+        if (PreviewViewer is not null)
+        {
+            PreviewViewer.MaxHeight = visibleHeight;
+            PreviewViewer.Height = double.NaN;
+        }
+    }
+}

src/PostIt/PostIt/ViewModels/Blogs/BlogsViewModel.cs

@@ -39,18 +39,56 @@ public partial class BlogsViewModel : ViewModelBase, IActionStatusViewModel
     /// <summary>Editor buffer for the post body. Same pattern as
     /// <see cref="DraftTitle"/>.</summary>
 
-    public string DraftArticle
+    public string? DraftArticle
      {
-        get => DraftArticleDocument.Text;
-        set  {
+        get => DraftArticleDocument?.Text ?? null;
+        set
+        {
+            var currentText = DraftArticleDocument?.Text;
+            if (string.Equals(currentText, value, StringComparison.Ordinal))
+            {
+                OnPropertyChanged(nameof(DraftArticle));
+                return;
+            }
+
             OnPropertyChanging(nameof(DraftArticle));
-            DraftArticleDocument = new TextDocument(value);
-            this.OnPropertyChanged(nameof(DraftArticle));
+            DraftArticleDocument = value is not null ? new TextDocument(value) : null;
+            OnPropertyChanged(nameof(DraftArticle));
         }
      }
 
-    [ObservableProperty]
-    public partial TextDocument DraftArticleDocument {get; set;}
+    private TextDocument? _draftArticleDocument;
+
+    public TextDocument? DraftArticleDocument
+    {
+        get => _draftArticleDocument;
+        set
+        {
+            if (ReferenceEquals(_draftArticleDocument, value))
+            {
+                return;
+            }
+
+            if (_draftArticleDocument is not null)
+            {
+                _draftArticleDocument.TextChanged -= DraftArticleDocument_TextChanged;
+            }
+
+            _draftArticleDocument = value;
+
+            if (_draftArticleDocument is not null)
+            {
+                _draftArticleDocument.TextChanged += DraftArticleDocument_TextChanged;
+            }
+
+            OnPropertyChanged(nameof(DraftArticleDocument));
+        }
+    }
+
+    private void DraftArticleDocument_TextChanged(object? sender, EventArgs e)
+    {
+        OnPropertyChanged(nameof(DraftArticle));
+    }
 
     /// <summary>Editor buffer for the post's publication state.
     /// Reflects the server-side <c>IsPublished</c> flag (the

src/PostIt/PostIt/Views/Blogs/BlogsPage.axaml

@@ -17,10 +17,14 @@
   <Design.DataContext>
     <vm:BlogsViewModel />
   </Design.DataContext>
-  <ScrollViewer HorizontalScrollBarVisibility="Disabled"
-    Margin="5,5,10,5" HorizontalAlignment="Stretch" BringIntoViewOnFocusChange="False"
-    VerticalAlignment="Stretch">
-    <StackPanel>
+  <ScrollViewer
+    Margin="5,5,10,5"
+    HorizontalAlignment="Stretch"
+    VerticalAlignment="Stretch"
+    HorizontalScrollBarVisibility="Disabled"
+    VerticalScrollBarVisibility="Auto"
+    BringIntoViewOnFocusChange="False">
+    <StackPanel HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
 
       <WrapPanel x:Name="BlogsHeaderPanel"
         Margin="5"
@@ -87,7 +91,7 @@
               <PathIcon Data="{StaticResource PublishedIcon}" />
             </CommandBarToggleButton.Icon>
           </CommandBarToggleButton>
-          <CommandBarToggleButton IsChecked="{Binding IsMarkdownViewerVisible, Mode=TwoWay}" Label="Markdown Viewer">
+          <CommandBarToggleButton IsChecked="{Binding IsMarkdownViewerVisible, Mode=TwoWay}" Label="Aperçu">
             <CommandBarToggleButton.Icon>
               <PathIcon Data="{StaticResource MarkdownIcon}" />
             </CommandBarToggleButton.Icon>
@@ -103,7 +107,7 @@
         </CommandBar.PrimaryCommands>
       </CommandBar>
 
-      <Grid Margin="12" RowSpacing="12" x:Name="MainGrid">
+      <Grid Margin="12" RowSpacing="12" x:Name="MainGrid" MinHeight="500">
         <Grid.RowDefinitions>
           <RowDefinition Height="Auto" />
           <RowDefinition Height="Auto" />
@@ -137,26 +141,8 @@
           </ListBox>
         </Border>
 
-        <Border
-          Grid.Row="2"
-          Padding="8"
-            HorizontalAlignment="Stretch"
-            VerticalAlignment="Stretch"
-          BorderBrush="Gray"
-          BorderThickness="1"
-          IsVisible="{Binding IsMarkdownViewerVisible}">
-          <md:MarkdownViewer Name="MarkdownViewer" MarkdownText="{Binding DraftArticle}" />
-        </Border>
-
-        <Border
-          Grid.Row="2"
-          Padding="8"
-          BorderBrush="Gray"
-          BorderThickness="1"
-            HorizontalAlignment="Stretch"
-            VerticalAlignment="Stretch"
-          IsVisible="{Binding !IsMarkdownViewerVisible}">
         <Grid
+          Grid.Row="2"
           HorizontalAlignment="Stretch"
           VerticalAlignment="Stretch"
           RowSpacing="10">
@@ -180,23 +166,13 @@
             PlaceholderText="Title"
             Text="{Binding DraftTitle, Mode=TwoWay}" />
 
-
-            <AvaloniaEdit:TextEditor
-              x:Name="DraftArticleTextEditor"
+          <postitControls:MarkdownEditorControl
             Grid.Row="2"
+            HorizontalAlignment="Stretch"
             VerticalAlignment="Stretch"
-              Document="{Binding DraftArticleDocument, Mode=TwoWay}"
-              FontFamily="Cascadia Code,Consolas,Menlo,Monospace"
-              ShowLineNumbers="True"
-              WordWrap="True"
-              BorderThickness="1"
-              BorderBrush="LightGray"
-              CornerRadius="5"
-              Padding="5,5,5,15"
-              HorizontalScrollBarVisibility="Disabled"
-              TextInputOptions.Multiline="True"
-              TextInputOptions.ReturnKeyType="Default"
-              />
+            IsPreviewVisible="{Binding IsMarkdownViewerVisible, Mode=TwoWay}"
+            MarkdownText="{Binding DraftArticle, Mode=TwoWay}"
+            Document="{Binding DraftArticleDocument, Mode=TwoWay}" />
 
           <Border x:Name="AttachmentsBorder"
             Grid.Row="3"
@@ -220,7 +196,6 @@
           <postitControls:StatusBar Grid.Row="4" DataContext="{Binding ActionStatus}" x:Name="StatusBar" />
 
         </Grid>
-        </Border>
       </Grid>
     </StackPanel>
   </ScrollViewer>

src/PostIt/PostIt/Views/Blogs/BlogsPage.axaml.cs

@@ -4,69 +4,16 @@ using Avalonia.Controls;
 using Avalonia.Platform.Storage;
 using Avalonia.Controls.Primitives;
 using Avalonia.Interactivity;
-using Avalonia.Controls.Platform;
 
 namespace PostIt.Views.Blogs;
 
 public partial class BlogsPage : ContentPage
 {
-    private IInputPane? _inputPane;
-
     public BlogsPage()
     {
         InitializeComponent();
     }
 
-    protected override void OnLoaded(RoutedEventArgs e)
-    {
-        base.OnLoaded(e);
-
-        // Récupère l'accès au TopLevel de la fenêtre/application
-        var topLevel = TopLevel.GetTopLevel(this);
-        if (topLevel != null)
-        {
-            _inputPane = topLevel!.InputPane;
-            if (_inputPane != null)
-            {
-                // S'abonne aux changements d'état du clavier virtuel
-                _inputPane.StateChanged += OnInputPaneStateChanged;
-
-                // Applique la configuration initiale si le clavier est déjà présent
-                UpdateLayoutForKeyboard(_inputPane.OccludedRect.Height);
-            }
-        }
-    }
-
-    protected override void OnUnloaded(RoutedEventArgs e)
-    {
-        if (_inputPane != null)
-        {
-            _inputPane.StateChanged -= OnInputPaneStateChanged;
-        }
-        base.OnUnloaded(e);
-    }
-
-
-   private void UpdateLayoutForKeyboard(double keyboardHeight)
-    {
-        double visibleHeight = this.Bounds.Height - keyboardHeight;
-        if (keyboardHeight > 0)
-        {
-            DraftArticleTextEditor.MaxHeight = visibleHeight;
-        }
-        else
-        {
-            DraftArticleTextEditor.MaxHeight = double.PositiveInfinity;
-        }
-    }
-
-    private void OnInputPaneStateChanged(object? sender, InputPaneStateEventArgs e)
-    {
-        // e.EndRect contient le rectangle final du clavier virtuel
-        // e.EndRect.Height vous donne sa hauteur exacte en pixels indépendants du périphérique (pixels logiques)
-        UpdateLayoutForKeyboard(e.EndRect.Height);
-    }
-
     protected override void OnApplyTemplate(TemplateAppliedEventArgs e)
     {
         base.OnApplyTemplate(e);

src/Yavsc.Org/wwwroot/css/site.css

@@ -1,4 +1 @@
-.user-icon  {
-  max-width: 1.5em;
-  max-height: 1.5em;
-}
+.user-icon{max-width:1.5em;max-height:1.5em}.card{padding:.5em}

src/Yavsc.Org/wwwroot/css/site.scss

@@ -1,4 +1,7 @@
-user-icon  {
+.user-icon  {
   max-width: 1.5em;
   max-height: 1.5em;
 }
+.card {
+  padding: .5em;
+}