refactor: extract editor dom event helpers

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

@@ -0,0 +1,23 @@
+//! 编辑器 DOM event target 的窄 helper。
+//!
+//! 本模块只做 EventTarget -> Element 归一化和 selector 命中判断，
+//! 不处理编辑器状态、overlay 或命令分发。
+
+use wasm_bindgen::JsCast;
+use web_sys::{Element, EventTarget, Node};
+
+pub(crate) fn target_element(target: EventTarget) -> Option<Element> {
+    target.clone().dyn_into::<Element>().ok().or_else(|| {
+        target
+            .dyn_into::<Node>()
+            .ok()
+            .and_then(|node| node.parent_element())
+    })
+}
+
+pub(crate) fn event_target_matches_selector(target: Option<EventTarget>, selector: &str) -> bool {
+    target
+        .and_then(target_element)
+        .and_then(|element| element.closest(selector).ok().flatten())
+        .is_some()
+}

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

@@ -6,6 +6,7 @@ pub(crate) mod block_menu_document;
 pub(crate) mod block_menu_overlay;
 pub(crate) mod block_menu_legacy_html;
 pub(crate) mod command_sync;
+pub(crate) mod dom_events;
 pub(crate) mod dom_selection;
 pub(crate) mod editor_focus;
 pub(crate) mod history_safe_commands;