From 7ec7201d641605299cbe13d809ac8fd567f67720 Mon Sep 17 00:00:00 2001
From: Masusder <59669685+Masusder@users.noreply.github.com>
Date: Sun, 9 Aug 2026 18:17:24 +0200
Subject: [PATCH] Additional exception info in a dropdown

---
 CUE4Parse                                   |  2 +-
 FModel/ViewModels/ExportSessionViewModel.cs | 25 ++++++++
 FModel/Views/ExportSessionWindow.xaml       | 63 +++++++++++++++++++--
 3 files changed, 84 insertions(+), 6 deletions(-)

diff --git a/CUE4Parse b/CUE4Parse
index 9a5f8b9f..b046ebb4 160000
--- a/CUE4Parse
+++ b/CUE4Parse
@@ -1 +1 @@
-Subproject commit 9a5f8b9f38d69eea18e075f37266e694f7177729
+Subproject commit b046ebb4307565e9cccd44aeac3afc828d3ab327
diff --git a/FModel/ViewModels/ExportSessionViewModel.cs b/FModel/ViewModels/ExportSessionViewModel.cs
index 4559463a..8638dad5 100644
--- a/FModel/ViewModels/ExportSessionViewModel.cs
+++ b/FModel/ViewModels/ExportSessionViewModel.cs
@@ -502,4 +502,29 @@ public class LogEntryViewModel(LogEvent log)
         _ => log.Exception?.Message ?? log.RenderMessage()
     };
     public Exception? Exception { get; } = log.Exception;
+    public IReadOnlyList<ExceptionDetailsViewModel> ExceptionDetails { get; } =
+        log.Exception is { } exception ? [new ExceptionDetailsViewModel(exception)] : [];
+}
+
+public class ExceptionDetailsViewModel
+{
+    public string Header { get; }
+    public string Details { get; }
+
+    public ExceptionDetailsViewModel(Exception exception)
+    {
+        var text = exception.ToString().ReplaceLineEndings("\n");
+        var newline = text.IndexOf('\n');
+
+        if (newline < 0)
+        {
+            Header = text;
+            Details = string.Empty;
+        }
+        else
+        {
+            Header = text[..newline];
+            Details = text[(newline + 1)..];
+        }
+    }
 }
diff --git a/FModel/Views/ExportSessionWindow.xaml b/FModel/Views/ExportSessionWindow.xaml
index bf1cb9af..29275547 100644
--- a/FModel/Views/ExportSessionWindow.xaml
+++ b/FModel/Views/ExportSessionWindow.xaml
@@ -131,8 +131,25 @@
             </Setter>
         </Style>
 
+        <Style x:Key="ExceptionTreeViewItemStyle"
+               TargetType="TreeViewItem">
+            <Setter Property="HorizontalContentAlignment"
+                    Value="Stretch" />
+            <Setter Property="Focusable"
+                    Value="False" />
+            <Setter Property="Template">
+                <Setter.Value>
+                    <ControlTemplate TargetType="TreeViewItem">
+                        <ContentPresenter ContentSource="Header"
+                                          HorizontalAlignment="Stretch"
+                                          Margin="0,2,8,6" />
+                    </ControlTemplate>
+                </Setter.Value>
+            </Setter>
+        </Style>
+
         <DataTemplate x:Key="LogEntryTemplate" DataType="{x:Type vm:LogEntryViewModel}">
-            <Grid Margin="0 1" ToolTip="{Binding Exception}">
+            <Grid Margin="0 1">
                 <Grid.ColumnDefinitions>
                     <ColumnDefinition Width="Auto" />
                     <ColumnDefinition Width="Auto" />
@@ -389,7 +406,8 @@
                               VirtualizingPanel.IsVirtualizing="True"
                               VirtualizingPanel.VirtualizationMode="Recycling"
                               VirtualizingPanel.ScrollUnit="Item"
-                              ScrollViewer.CanContentScroll="True">
+                              ScrollViewer.CanContentScroll="True"
+                              ScrollViewer.HorizontalScrollBarVisibility="Disabled">
                         <TreeView.ItemContainerStyle>
                             <Style TargetType="TreeViewItem" BasedOn="{StaticResource StretchTreeViewItemStyle}">
                                 <Style.Triggers>
@@ -414,9 +432,44 @@
                                                           HorizontalAlignment="Stretch" />
 
                                         <HierarchicalDataTemplate.ItemTemplate>
-                                            <DataTemplate DataType="{x:Type vm:LogEntryViewModel}">
-                                                <ContentPresenter Content="{Binding}" ContentTemplate="{StaticResource LogEntryTemplate}" />
-                                            </DataTemplate>
+                                            <HierarchicalDataTemplate DataType="{x:Type vm:LogEntryViewModel}"
+                                                                      ItemsSource="{Binding ExceptionDetails}"
+                                                                      ItemContainerStyle="{StaticResource ExceptionTreeViewItemStyle}">
+                                                <ContentPresenter Content="{Binding}"
+                                                                  ContentTemplate="{StaticResource LogEntryTemplate}"
+                                                                  HorizontalAlignment="Stretch" />
+                                                <HierarchicalDataTemplate.ItemTemplate>
+                                                    <DataTemplate DataType="{x:Type vm:ExceptionDetailsViewModel}">
+                                                        <Border Padding="8"
+                                                                CornerRadius="3"
+                                                                BorderThickness="2,0,0,0"
+                                                                BorderBrush="#EF5350"
+                                                                Background="{DynamicResource {x:Static adonisUi:Brushes.Layer1BackgroundBrush}}">
+                                                            <RichTextBox IsReadOnly="True"
+                                                                         IsDocumentEnabled="False"
+                                                                         MaxHeight="220"
+                                                                         FontFamily="Consolas"
+                                                                         FontSize="10"
+                                                                         BorderThickness="0"
+                                                                         Padding="0"
+                                                                         Background="Transparent"
+                                                                         VerticalScrollBarVisibility="Auto"
+                                                                         HorizontalScrollBarVisibility="Disabled">
+                                                                <FlowDocument PagePadding="0">
+                                                                    <Paragraph Margin="0">
+                                                                        <Run Text="{Binding Header, Mode=OneWay}"
+                                                                             FontWeight="SemiBold"
+                                                                             Foreground="#EF5350" />
+                                                                        <LineBreak />
+                                                                        <Run Text="{Binding Details, Mode=OneWay}"
+                                                                             Foreground="{DynamicResource {x:Static adonisUi:Brushes.ForegroundBrush}}" />
+                                                                    </Paragraph>
+                                                                </FlowDocument>
+                                                            </RichTextBox>
+                                                        </Border>
+                                                    </DataTemplate>
+                                                </HierarchicalDataTemplate.ItemTemplate>
+                                            </HierarchicalDataTemplate>
                                         </HierarchicalDataTemplate.ItemTemplate>
                                     </HierarchicalDataTemplate>
                                 </HierarchicalDataTemplate.ItemTemplate>