feat(properties): show XDATA records in Properties panel

locales/en-US/opencadstudio.ftl

@@ -2563,6 +2563,7 @@ properties =
     .ext-line-lineweight = Ext line lineweight
     .ext-line-offset = Ext line offset
     .extended-entity = Extended Entity
+    .extended-data = Extended Data
     .extended-lighting = Extended Lighting
     .extents-max = Extents Max
     .extents-min = Extents Min

src/app/properties.rs

@@ -27,6 +27,27 @@ fn visual_style_properties_text(style: &acadrust::objects::VisualStyle) -> Strin
         .join("\n")
 }
 
+/// Format an XDATA value for display in the Properties panel.
+fn format_xdata_value(value: &acadrust::xdata::XDataValue) -> String {
+    use acadrust::xdata::XDataValue;
+    match value {
+        XDataValue::String(s) => s.clone(),
+        XDataValue::ControlString(s) => format!("ControlString: {s}"),
+        XDataValue::LayerName(s) => format!("Layer: {s}"),
+        XDataValue::BinaryData(b) => format!("Binary: {} bytes", b.len()),
+        XDataValue::Handle(h) => format!("Handle: {:X}", h.value()),
+        XDataValue::Point3D(v)
+        | XDataValue::Position3D(v)
+        | XDataValue::Displacement3D(v)
+        | XDataValue::Direction3D(v) => format!("{:.6}, {:.6}, {:.6}", v.x, v.y, v.z),
+        XDataValue::Real(r) | XDataValue::Distance(r) | XDataValue::ScaleFactor(r) => {
+            format!("{r}")
+        }
+        XDataValue::Integer16(i) => format!("{i}"),
+        XDataValue::Integer32(i) => format!("{i}"),
+    }
+}
+
 impl OpenCADStudio {
     /// Rebuild the PropertiesPanel from the current entity selection.
     /// Preserves UI state (open pickers, edit buffer) across refreshes.
@@ -613,6 +634,32 @@ impl OpenCADStudio {
                         entity,
                     ));
 
+                    // Extended Data (XDATA) section: show attached app records.
+                    {
+                        use crate::entities::common::ro_prop;
+                        let xd = &source_entity.common().extended_data;
+                        if !xd.is_empty() {
+                            let mut xd_props = Vec::new();
+                            for rec in xd.records() {
+                                let value_text = rec
+                                    .values
+                                    .iter()
+                                    .map(format_xdata_value)
+                                    .collect::<Vec<_>>()
+                                    .join(", ");
+                                xd_props.push(ro_prop(
+                                    &rec.application_name,
+                                    "xdata_value",
+                                    value_text,
+                                ));
+                            }
+                            sections.push(crate::scene::model::object::PropSection {
+                                title: t!("Extended Data").into_owned(),
+                                props: xd_props,
+                            });
+                        }
+                    }
+
                     // Uniform-scale checkbox for block references (#427):
                     // while the three scale factors are equal (and the user
                     // hasn't opted into per-axis editing) the panel shows one

src/locale_catalog.rs

@@ -1006,6 +1006,7 @@ pub(super) fn message_attribute(source: &str) -> Option<(&'static str, &'static
         "Ext line offset" => Some(("properties", "ext-line-offset")),
         "Ext line weight (DIMLWE)" => Some(("draw", "ext-line-weight-dimlwe")),
         "Extend" => Some(("modify", "extend")),
+        "Extended Data" => Some(("properties", "extended-data")),
         "Extended Entity" => Some(("properties", "extended-entity")),
         "Extended Lighting" => Some(("properties", "extended-lighting")),
         "Extension" => Some(("common", "extension")),