feat(lesson-preparation): 树节点行组件

src/modules/lesson-preparation/components/structure-tree/tree-node-row.tsx

@@ -0,0 +1,149 @@
+"use client";
+
+import { useTranslations } from "next-intl";
+import type { Block } from "../../types";
+import { useLessonPlanEditor } from "../../hooks/use-lesson-plan-editor";
+
+interface Props {
+  node: Block;
+  /** 是否展开到正文 */
+  isExpanded: boolean;
+  /** 是否有子节点（如师生交互的对话轮次） */
+  hasChildren?: boolean;
+  isChildrenExpanded?: boolean;
+  onToggleChildren?: () => void;
+  /** 子节点（如对话轮次） */
+  children?: { id: string; label: string; kind: string }[];
+}
+
+export function TreeNodeRow({
+  node,
+  isExpanded,
+  hasChildren,
+  isChildrenExpanded,
+  onToggleChildren,
+  children,
+}: Props) {
+  const t = useTranslations("lessonPreparation");
+  const selectedNodeId = useLessonPlanEditor((s) => s.selectedNodeId);
+  const selectNode = useLessonPlanEditor((s) => s.selectNode);
+  const toggleExpand = useLessonPlanEditor((s) => s.toggleExpand);
+
+  const isActive = selectedNodeId === node.id;
+  const dotColor = `var(--lp-dot-${node.type})`;
+
+  return (
+    <div>
+      <div
+        role="button"
+        tabIndex={0}
+        onClick={() => selectNode(node.id)}
+        onKeyDown={(e) => {
+          if (e.key === "Enter" || e.key === " ") {
+            e.preventDefault();
+            selectNode(node.id);
+          }
+        }}
+        style={{
+          display: "flex",
+          alignItems: "center",
+          gap: 6,
+          padding: "6px 8px",
+          borderRadius: 5,
+          cursor: "pointer",
+          background: isActive ? "var(--muted)" : "transparent",
+          lineHeight: 1.3,
+          fontSize: 13,
+        }}
+        className="lp-tree-row"
+      >
+        <span
+          style={{
+            width: 14,
+            height: 14,
+            display: "inline-flex",
+            alignItems: "center",
+            justifyContent: "center",
+            fontSize: 9,
+            color: "var(--muted-foreground)",
+            cursor: hasChildren ? "pointer" : "default",
+            visibility: hasChildren ? "visible" : "hidden",
+          }}
+          onClick={(e) => {
+            if (hasChildren && onToggleChildren) {
+              e.stopPropagation();
+              onToggleChildren();
+            }
+          }}
+        >
+          {hasChildren ? (isChildrenExpanded ? "▾" : "▸") : ""}
+        </span>
+        <span style={{ width: 6, height: 6, borderRadius: "50%", background: dotColor, flexShrink: 0 }} />
+        <span
+          style={{
+            flex: 1,
+            overflow: "hidden",
+            textOverflow: "ellipsis",
+            whiteSpace: "nowrap",
+            color: "var(--foreground)",
+          }}
+        >
+          {node.title}
+        </span>
+        <span style={{ fontSize: 10, color: "var(--muted-foreground)", fontWeight: 500 }}>
+          {node.type}
+        </span>
+        {isExpanded && (
+          <button
+            type="button"
+            onClick={(e) => {
+              e.stopPropagation();
+              toggleExpand(node.id);
+            }}
+            style={{
+              fontSize: 9,
+              color: "var(--foreground)",
+              background: "var(--muted)",
+              padding: "1px 5px",
+              borderRadius: 2,
+              fontWeight: 500,
+              border: "none",
+              cursor: "pointer",
+            }}
+          >
+            {t("v4.tree.onPaper")}
+          </button>
+        )}
+      </div>
+
+      {hasChildren && isChildrenExpanded && children && (
+        <div
+          style={{
+            marginLeft: 10,
+            paddingLeft: 8,
+            borderLeft: "1px solid var(--border)",
+          }}
+        >
+          {children.map((c) => (
+            <div
+              key={c.id}
+              style={{
+                display: "flex",
+                alignItems: "center",
+                gap: 6,
+                padding: "6px 8px",
+                borderRadius: 5,
+                fontSize: 12,
+                color: "var(--muted-foreground)",
+              }}
+            >
+              <span style={{ width: 6, height: 6, borderRadius: "50%", background: "var(--lp-dot-default)", opacity: 0.5 }} />
+              <span style={{ flex: 1 }}>{c.label}</span>
+              <span style={{ fontSize: 10 }}>{c.kind}</span>
+            </div>
+          ))}
+        </div>
+      )}
+    </div>
+  );
+}