fix(editor): 仅在使用 left/top 定位时修正节点位置

避免对使用 right/bottom 定位的绝对定位节点误写 left 或 top。

packages/editor/src/utils/editor.ts

@@ -375,11 +375,18 @@ export const fixNodePosition = (config: MNode, parent: MContainer, stage: StageC
     return config.style;
   }
 
-  return {
-    ...(config.style || {}),
-    top: getMiddleTop(config, parent, stage),
-    left: fixNodeLeft(config, parent, stage?.renderer?.contentWindow?.document),
-  };
+  const style = { ...(config.style || {}) };
+  const baseStyle = config.style || {};
+
+  if ('left' in baseStyle && !('right' in baseStyle)) {
+    style.left = fixNodeLeft(config, parent, stage?.renderer?.contentWindow?.document);
+  }
+
+  if ('top' in baseStyle && !('bottom' in baseStyle)) {
+    style.top = getMiddleTop(config, parent, stage);
+  }
+
+  return style;
 };
 
 // 序列化配置

packages/editor/tests/unit/utils/editor.spec.ts

@@ -1105,6 +1105,40 @@ describe('补充：fixNodeLeft / fixNodePosition / serializeConfig', () => {
     expect(result).toBeDefined();
   });
 
+  test('fixNodePosition - 仅设置 right 时不修正 left', () => {
+    const style = { position: 'absolute', right: 10 } as any;
+    const result = editor.fixNodePosition({ id: 'a', style } as any, { id: 'p', items: [] } as any, null);
+    expect(result).toEqual(style);
+    expect(result?.left).toBeUndefined();
+  });
+
+  test('fixNodePosition - 仅设置 bottom 时不修正 top', () => {
+    const style = { position: 'absolute', bottom: 20 } as any;
+    const result = editor.fixNodePosition({ id: 'a', style } as any, { id: 'p', items: [] } as any, null);
+    expect(result).toEqual(style);
+    expect(result?.top).toBeUndefined();
+  });
+
+  test('fixNodePosition - 设置 left 且无 right 时修正 left', () => {
+    const doc = document.implementation.createHTMLDocument();
+    const parent = doc.createElement('div');
+    parent.dataset.tmagicId = 'p3';
+    Object.defineProperty(parent, 'offsetWidth', { value: 100 });
+    const child = doc.createElement('div');
+    child.dataset.tmagicId = 'a3';
+    Object.defineProperty(child, 'offsetWidth', { value: 80 });
+    parent.appendChild(child);
+    doc.body.appendChild(parent);
+
+    const stage = { renderer: { contentWindow: { document: doc } } } as any;
+    const result = editor.fixNodePosition(
+      { id: 'a3', style: { position: 'absolute', left: 50 } } as any,
+      { id: 'p3', items: [] } as any,
+      stage,
+    );
+    expect(result?.left).toBe(20);
+  });
+
   test('serializeConfig - 输出去掉了 key 引号', () => {
     const out = editor.serializeConfig({ a: 1 });
     expect(out).toContain('a:');