Add C FFI for Document::parent

Author: shadowfacts

crates/core/c_src/include/LiveViewNativeCore.h

@@ -45,6 +45,11 @@ typedef struct __Node {
   __NodeData data;
 } __Node;
 
+typedef struct __OptionNodeRef {
+	bool is_some;
+	NodeRef some_value;
+} __OptionNodeRef;
+
 extern void __liveview_native_core$AttributeVec$drop(_AttributeVec vec);
 
 extern _RustString __liveview_native_core$Document$to_string(__Document doc);
@@ -75,3 +80,5 @@ extern _RustSlice __liveview_native_core$Document$children(__Document doc,
 
 extern _AttributeVec __liveview_native_core$Document$attributes(__Document doc,
                                                                 NodeRef node);
+
+extern __OptionNodeRef __liveview_native_core$Document$get_parent(__Document doc, NodeRef node);

crates/core/src/ffi/mod.rs

@@ -62,6 +62,12 @@ pub union NodeData<'a> {
     pub leaf: RustStr<'a>,
 }
 
+#[repr(C)]
+pub struct OptionNodeRef {
+    pub is_some: bool,
+    pub some_value: NodeRef,
+}
+
 #[repr(C)]
 #[derive(Copy, Clone)]
 pub struct Element<'a> {
@@ -208,3 +214,18 @@ pub extern "C" fn document_get_attributes(
     }
     AttributeVec::from_vec(result)
 }
+
+#[export_name = "__liveview_native_core$Document$get_parent"]
+pub extern "C" fn document_get_parent(doc: *const dom::Document, node: NodeRef) -> OptionNodeRef {
+    let doc = unsafe { &*doc };
+    match doc.parent(node) {
+        Some(parent) => OptionNodeRef {
+            is_some: true,
+            some_value: parent,
+        },
+        None => OptionNodeRef {
+            is_some: false,
+            some_value: Default::default(),
+        },
+    }
+}