refactor: extract block dnd element helpers

rust/spikes/leptos-tiptap-spike/src/editor_runtime/block_dnd.rs

@@ -85,6 +85,26 @@ pub(crate) fn element_within_handle_shell(element: &Element, handle_selector: &s
     element.closest(handle_selector).ok().flatten().is_some()
 }
 
+pub(crate) fn direct_block_from_element(mut element: Element, root: &Element) -> Option<Element> {
+    loop {
+        let parent = element.parent_element()?;
+        if parent.is_same_node(Some(root)) {
+            return Some(element);
+        }
+        element = parent;
+    }
+}
+
+pub(crate) fn top_level_block_index(root: &Element, block: &Element) -> Option<usize> {
+    let children = root.children();
+    (0..children.length()).find_map(|index| {
+        children
+            .item(index)
+            .filter(|child| child.is_same_node(Some(block)))
+            .map(|_| index as usize)
+    })
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;

rust/spikes/leptos-tiptap-spike/src/lib.rs

@@ -22,8 +22,9 @@ use web_sys::{
 
 use editor_runtime::attachment_upload::dispatch_editor_upload_request;
 use editor_runtime::block_dnd::{
-    drop_indicator_from_geometry, element_within_handle_shell, event_target_from_point,
-    pointer_in_handle_corridor_geometry, HandleCorridorGeometry,
+    direct_block_from_element, drop_indicator_from_geometry, element_within_handle_shell,
+    event_target_from_point, pointer_in_handle_corridor_geometry, top_level_block_index,
+    HandleCorridorGeometry,
 };
 use editor_runtime::block_menu_overlay;
 use editor_runtime::block_menu_legacy_html::{
@@ -4837,26 +4838,6 @@ fn handle_lane_left(stage_rect_width: f64) -> f64 {
         .max(HANDLE_STAGE_PADDING_LEFT)
 }
 
-fn direct_block_from_element(mut element: Element, root: &Element) -> Option<Element> {
-    loop {
-        let parent = element.parent_element()?;
-        if parent.is_same_node(Some(root)) {
-            return Some(element);
-        }
-        element = parent;
-    }
-}
-
-fn top_level_block_index(root: &Element, block: &Element) -> Option<usize> {
-    let children = root.children();
-    (0..children.length()).find_map(|index| {
-        children
-            .item(index)
-            .filter(|child| child.is_same_node(Some(block)))
-            .map(|_| index as usize)
-    })
-}
-
 fn block_label_for_element(block: &Element) -> String {
     match block.get_attribute("data-type").as_deref() {
         Some("taskList") => "Todo 列表".to_string(),