refactor: extract block dnd handle predicate

rust/spikes/leptos-tiptap-spike/generated/island/mnote-leptos-tiptap-spike-island.js

@@ -1284,7 +1284,7 @@ function __wbg_get_imports() {
             return ret;
         },
         __wbindgen_cast_0000000000000006: function(arg0, arg1) {
-            // Cast intrinsic for `Closure(Closure { owned: true, function: Function { arguments: [NamedExternref("KeyboardEvent")], shim_idx: 856, ret: Unit, inner_ret: Some(Unit) }, mutable: true }) -> Externref`.
+            // Cast intrinsic for `Closure(Closure { owned: true, function: Function { arguments: [NamedExternref("KeyboardEvent")], shim_idx: 886, ret: Unit, inner_ret: Some(Unit) }, mutable: true }) -> Externref`.
             const ret = makeMutClosure(arg0, arg1, wasm_bindgen__convert__closures_____invoke__hd90af689bc3e71bf);
             return ret;
         },

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

@@ -4,7 +4,7 @@
 //! 也不分发 editor command；调用方负责保留编辑器状态编排。
 
 use crate::editor_runtime::block_hover_state::{DropIndicatorState, DropPlacement};
-use web_sys::{window, EventTarget};
+use web_sys::{window, Element, EventTarget};
 
 pub(crate) struct HandleCorridorGeometry {
     pub(crate) stage_left: f64,
@@ -81,6 +81,10 @@ pub(crate) fn event_target_from_point(client_x: i32, client_y: i32) -> Option<Ev
         .map(Into::into)
 }
 
+pub(crate) fn element_within_handle_shell(element: &Element, handle_selector: &str) -> bool {
+    element.closest(handle_selector).ok().flatten().is_some()
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;

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

@@ -22,8 +22,8 @@ use web_sys::{
 
 use editor_runtime::attachment_upload::dispatch_editor_upload_request;
 use editor_runtime::block_dnd::{
-    drop_indicator_from_geometry, event_target_from_point, pointer_in_handle_corridor_geometry,
-    HandleCorridorGeometry,
+    drop_indicator_from_geometry, element_within_handle_shell, event_target_from_point,
+    pointer_in_handle_corridor_geometry, HandleCorridorGeometry,
 };
 use editor_runtime::block_menu_overlay;
 use editor_runtime::block_menu_legacy_html::{
@@ -4914,12 +4914,7 @@ fn hovered_block_from_target(target: web_sys::EventTarget) -> Option<HoveredBloc
     let root = editor_root_element()?;
     let element = target_element(target)?;
 
-    if element
-        .closest(HANDLE_SHELL_SELECTOR)
-        .ok()
-        .flatten()
-        .is_some()
-    {
+    if element_within_handle_shell(&element, HANDLE_SHELL_SELECTOR) {
         return None;
     }
 
@@ -8103,7 +8098,7 @@ fn App(mount_options: MountOptions) -> impl IntoView {
                         };
 
                         if let Some(element) = target_element(target.clone()) {
-                            if element.closest(HANDLE_SHELL_SELECTOR).ok().flatten().is_some() {
+                            if element_within_handle_shell(&element, HANDLE_SHELL_SELECTOR) {
                                 return;
                             }
                         }
@@ -8155,7 +8150,7 @@ fn App(mount_options: MountOptions) -> impl IntoView {
                         };
 
                         if let Some(element) = target_element(target.clone()) {
-                            if element.closest(HANDLE_SHELL_SELECTOR).ok().flatten().is_some() {
+                            if element_within_handle_shell(&element, HANDLE_SHELL_SELECTOR) {
                                 return;
                             }
                         }
@@ -8208,7 +8203,7 @@ fn App(mount_options: MountOptions) -> impl IntoView {
                         };
 
                         if let Some(element) = target_element(target.clone()) {
-                            if element.closest(HANDLE_SHELL_SELECTOR).ok().flatten().is_some() {
+                            if element_within_handle_shell(&element, HANDLE_SHELL_SELECTOR) {
                                 return;
                             }
                         }