TemplateDesigner: pdf-Export

LehrerApp.TemplateDesigner.Tests/ProjectLifecycleTests.cs

@@ -91,6 +91,15 @@ public sealed class ProjectLifecycleTests
         Assert.Contains("mehrfach", exception.Message);
     }
 
+    [Fact]
+    public void AktuelleAnsicht_KannAlsPdfGerendertWerden()
+    {
+        var pdf = new DesignerViewModel().RenderCurrentPdf();
+
+        Assert.True(pdf.Length > 100);
+        Assert.Equal("%PDF-", System.Text.Encoding.ASCII.GetString(pdf, 0, 5));
+    }
+
     private static readonly byte[] OnePixelPng = Convert.FromBase64String(
         "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNk+A8AAQUBAScY42YAAAAASUVORK5CYII=");
 }

LehrerApp.TemplateDesigner/DesignerViewModel.cs

@@ -141,6 +141,9 @@ public partial class DesignerViewModel : ObservableObject
     public ITemplateDataProvider BuildDataProvider() => new DesignerDataProvider(Placeholders.ToDictionary(
         x => x.Name.Trim(), x => x.ToValue(), StringComparer.Ordinal));
 
+    public byte[] RenderCurrentPdf() =>
+        new QuestTemplateRenderer().RenderToPdf(BuildLoaded(), BuildDataProvider());
+
     public void ApplyPdfImport(PdfImportResult import)
     {
         TemplateId = import.Manifest.Id; TemplateName = import.Manifest.Name; Description = import.Manifest.Description;

LehrerApp.TemplateDesigner/MainWindow.axaml

@@ -10,6 +10,7 @@
         <Separator/>
         <MenuItem Header="Speichern" InputGesture="Ctrl+S" Click="OnSave"/>
         <MenuItem Header="Speichern unter …" InputGesture="Ctrl+Shift+S" Click="OnSaveAs"/>
+        <MenuItem Header="Aktuelle Ansicht als PDF exportieren …" Click="OnExportCurrentPdf"/>
         <Separator/>
         <MenuItem Header="Ausgangsvorlage importieren …" Click="OnImportStarterTemplate"/>
         <Separator/>
@@ -204,8 +205,9 @@
       </TabControl>
 
       <Grid Grid.Column="1" RowDefinitions="Auto,*" Margin="0,18">
-        <Grid ColumnDefinitions="*,Auto" Margin="12,0,12,10"><TextBlock Text="Layout-DSL" Classes="section"/>
+        <Grid ColumnDefinitions="*,Auto,8,Auto" Margin="12,0,12,10"><TextBlock Text="Layout-DSL" Classes="section"/>
-          <Button Grid.Column="1" Content="Prüfen &amp; Vorschau" Click="OnPreview"/></Grid>
+          <Button Grid.Column="1" Content="Prüfen &amp; Vorschau" Click="OnPreview"/>
+          <Button Grid.Column="3" Content="Als PDF exportieren …" Click="OnExportCurrentPdf"/></Grid>
         <TabControl Grid.Row="1" Margin="12">
           <TabItem Header="Seite 1">
             <TextBox Text="{Binding LayoutSource}" AcceptsReturn="True" TextWrapping="NoWrap"

LehrerApp.TemplateDesigner/MainWindow.axaml.cs

@@ -267,6 +267,40 @@ public partial class MainWindow : Window
 
     private async void OnSaveAs(object? sender, RoutedEventArgs e) => await SaveAsAsync();
 
+    private async void OnExportCurrentPdf(object? sender, RoutedEventArgs e)
+    {
+        byte[] pdf;
+        try
+        {
+            pdf = _viewModel.RenderCurrentPdf();
+        }
+        catch (Exception ex)
+        {
+            _viewModel.SetStatus($"PDF-Export fehlgeschlagen: {ex.Message}", true);
+            return;
+        }
+
+        var file = await StorageProvider.SaveFilePickerAsync(new()
+        {
+            Title = "Aktuelle Vorlagenansicht als PDF exportieren",
+            SuggestedFileName = _viewModel.TemplateId + "-vorschau.pdf",
+            DefaultExtension = "pdf",
+            FileTypeChoices = [new("PDF-Dateien") { Patterns = ["*.pdf"] }],
+        });
+        if (file is null) return;
+
+        try
+        {
+            var destination = EnsurePdfExtension(file.Path.LocalPath);
+            await File.WriteAllBytesAsync(destination, pdf);
+            _viewModel.SetStatus($"PDF-Vorschau exportiert: {Path.GetFileName(destination)}", false);
+        }
+        catch (Exception ex)
+        {
+            _viewModel.SetStatus($"PDF-Export fehlgeschlagen: {ex.Message}", true);
+        }
+    }
+
     private async Task SaveAsAsync()
     {
         try { _viewModel.BuildLoaded(); }
@@ -332,6 +366,9 @@ public partial class MainWindow : Window
     private static string EnsurePackageExtension(string path) =>
         string.Equals(Path.GetExtension(path), TemplatePackage.Extension, StringComparison.OrdinalIgnoreCase)
             ? path : path + TemplatePackage.Extension;
+    private static string EnsurePdfExtension(string path) =>
+        string.Equals(Path.GetExtension(path), ".pdf", StringComparison.OrdinalIgnoreCase)
+            ? path : path + ".pdf";
     private void RefreshStarterTemplates(string? selectedId = null) =>
         _viewModel.SetStarterTemplates(_starterTemplates.GetAll(), selectedId);