feat: 扩展Face保持关系编辑语义

step_editor/isolated_edit_worker.py

@@ -34,6 +34,8 @@ def _execute(model: StepModel, operation: str, args: list[object]) -> str:
         return model.resize_face_area(int(args[0]), float(args[1]))
     if operation == "resize_face_size_local":
         return model.resize_face_size_local(int(args[0]), float(args[1]), str(args[2]))
+    if operation == "resize_face_size_local_keep_relations":
+        return model.resize_face_size_local_keep_relations(int(args[0]), float(args[1]), str(args[2]))
     if operation == "resize_face_size_owning_scale":
         return model.resize_face_size_owning_scale(int(args[0]), float(args[1]), str(args[2]))
     if operation == "move_face_center_local":
@@ -44,6 +46,14 @@ def _execute(model: StepModel, operation: str, args: list[object]) -> str:
             int(args[0]),
             (float(center[0]), float(center[1]), float(center[2])),
         )
+    if operation == "move_face_center_local_keep_relations":
+        center = list(args[1])
+        if len(center) != 3:
+            raise ValueError("move_face_center_local_keep_relations requires a 3D target center.")
+        return model.move_face_center_local_keep_relations(
+            int(args[0]),
+            (float(center[0]), float(center[1]), float(center[2])),
+        )
     if operation == "resize_shell_thickness":
         return model.resize_shell_thickness(int(args[0]), float(args[1]))
     if operation == "resize_shell_thickness_owning_scale":

step_editor/operations.py

@@ -262,6 +262,8 @@ class OperationMixin:
         self,
         face_id: int,
         plan: dict[str, object],
+        *,
+        operation_label: str = "拉伸/切除",
     ) -> dict[str, object]:
         relation_status = str(plan.get("first_level_planar_relation_status") or "")
         relation_scope = str(plan.get("first_level_planar_relation_scope") or "")
@@ -313,10 +315,13 @@ class OperationMixin:
             )
         else:
             summary = (
-                "Face保持关系：可按拉伸/切除执行并反查一级平面关系；"
+                f"Face保持关系：可按{operation_label}执行并反查一级平面关系；"
                 f"平行 {parallel_count}，垂直 {perpendicular_count}。"
             )
         return {
+            "face_planar_relation_constraint_requested": True,
+            "face_planar_relation_constraint_label": "保持一级平面关系",
+            "face_planar_relation_constraint_operation": operation_label,
             "face_push_pull_planar_relation_constraint_requested": True,
             "face_push_pull_planar_relation_constraint_label": "保持一级平面关系",
             "face_push_pull_planar_constraint_status": "blocked" if blockers else "ready",
@@ -339,16 +344,23 @@ class OperationMixin:
             ),
         }
 
-    def push_pull_keep_relations_plan(self, face_id: int, distance: float) -> dict[str, object]:
-        plan = self.push_pull_plan(face_id, distance)
-        constraint_fields = self._face_push_pull_planar_relation_constraint_fields(face_id, plan)
-        plan.update(constraint_fields)
-        plan["resize_strategy"] = "push-pull-planar-face-keep-relations"
-        plan["edit_strategy_label"] = "保持一级平面关系的拉伸/切除"
-        plan["edit_semantics"] = (
-            "沿当前 Face 法向拉伸/切除，同时要求当前 Face 与共享边一级相邻平面的平行/垂直关系"
-            "在执行前可验证，并在执行后反查。"
+    def _with_face_planar_relation_constraint(
+        self,
+        face_id: int,
+        plan: dict[str, object],
+        *,
+        operation_label: str,
+        edit_strategy_label: str,
+        edit_semantics: str,
+    ) -> dict[str, object]:
+        constraint_fields = self._face_push_pull_planar_relation_constraint_fields(
+            face_id,
+            plan,
+            operation_label=operation_label,
         )
+        plan.update(constraint_fields)
+        plan["edit_strategy_label"] = edit_strategy_label
+        plan["edit_semantics"] = edit_semantics
         if plan["status"] != "blocked" and constraint_fields["face_push_pull_planar_constraint_status"] == "blocked":
             blockers = str(constraint_fields.get("face_push_pull_planar_constraint_blockers") or "")
             plan["status"] = "blocked"
@@ -368,6 +380,21 @@ class OperationMixin:
                 plan["message"] = str(constraint_fields["face_push_pull_planar_constraint_summary"])
         return plan
 
+    def push_pull_keep_relations_plan(self, face_id: int, distance: float) -> dict[str, object]:
+        plan = self.push_pull_plan(face_id, distance)
+        self._with_face_planar_relation_constraint(
+            face_id,
+            plan,
+            operation_label="拉伸/切除",
+            edit_strategy_label="保持一级平面关系的拉伸/切除",
+            edit_semantics=(
+                "沿当前 Face 法向拉伸/切除，同时要求当前 Face 与共享边一级相邻平面的平行/垂直关系"
+                "在执行前可验证，并在执行后反查。"
+            ),
+        )
+        plan["resize_strategy"] = "push-pull-planar-face-keep-relations"
+        return plan
+
     def _multistep_prismatic_plan_blocker(self, face_id: int, operation_label: str) -> str:
         try:
             quick_info = self.quick_face_info(face_id)
@@ -4070,6 +4097,23 @@ class OperationMixin:
             ),
         }
 
+    def face_center_local_move_keep_relations_plan(
+        self,
+        face_id: int,
+        target_center: tuple[float, float, float],
+    ) -> dict[str, object]:
+        plan = self.face_center_owning_translation_plan(face_id, target_center)
+        return self._with_face_planar_relation_constraint(
+            face_id,
+            plan,
+            operation_label="中心移动",
+            edit_strategy_label="保持一级平面关系的中心移动",
+            edit_semantics=(
+                "把目标中心换算成平移量并移动所属特征或 Solid，同时要求当前 Face 与共享边一级相邻平面的"
+                "平行/垂直关系在执行前可验证，并在执行后反查；不做单面局部扭曲。"
+            ),
+        )
+
     def existing_chamfer_resize_plan(self, face_id: int, target_distance: float) -> dict[str, object]:
         if face_id < 0 or face_id >= len(self.faces):
             raise ValueError(f"Unknown face id {face_id}")
@@ -4604,6 +4648,26 @@ class OperationMixin:
             ),
         }
 
+    def face_size_local_resize_keep_relations_plan(
+        self,
+        face_id: int,
+        target_size: float,
+        axis: str = "width",
+    ) -> dict[str, object]:
+        axis_key = "height" if str(axis).strip().lower() in {"height", "h", "v", "y"} else "width"
+        axis_label = "面内宽度" if axis_key == "height" else "面内长度"
+        plan = self.face_size_owning_scale_plan(face_id, target_size, axis_key)
+        return self._with_face_planar_relation_constraint(
+            face_id,
+            plan,
+            operation_label=f"{axis_label}修改",
+            edit_strategy_label=f"保持一级平面关系的{axis_label}修改",
+            edit_semantics=(
+                f"沿当前 Face 的{axis_label}方向缩放所属特征或 Solid，同时要求当前 Face 与共享边一级相邻平面的"
+                "平行/垂直关系在执行前可验证，并在执行后反查；不做单面局部扭曲。"
+            ),
+        )
+
     def _rectangular_prismatic_size_resize_plan(
         self,
         *,
@@ -8144,6 +8208,35 @@ class OperationMixin:
             f"risk={plan['risk']}. {result_check}"
         )
 
+    def move_face_center_local_keep_relations(
+        self,
+        face_id: int,
+        target_center: tuple[float, float, float],
+    ) -> str:
+        plan = self.face_center_local_move_keep_relations_plan(face_id, target_center)
+        if plan["status"] == "blocked":
+            raise ValueError(str(plan["message"]))
+
+        self._remember_face_target_logical_id(plan, face_id)
+        vector = tuple(plan["translation_vector"])
+        result, result_check = self._run_checked_face_edit(
+            plan,
+            lambda: (
+                self.translate_solid(int(plan["solid_id"]), vector)
+                if plan.get("target_kind") == "solid"
+                else self.translate_part(int(plan["part_id"]), vector)
+            ),
+        )
+        return (
+            "Face center move completed with first-level planar relations: "
+            f"face {face_id}, "
+            f"current_center={plan.get('current_face_center')}, "
+            f"target_center={plan.get('target_face_center')}, "
+            f"move={plan.get('face_center_move_vector')}, "
+            f"target={plan.get('target_kind')}, "
+            f"risk={plan['risk']}. {result_check} {result}"
+        )
+
     def face_area_local_resize_preview_polydata(
         self,
         face_id: int,
@@ -8243,6 +8336,33 @@ class OperationMixin:
             f"risk={plan['risk']}. {result_check}"
         )
 
+    def resize_face_size_local_keep_relations(self, face_id: int, target_size: float, axis: str = "width") -> str:
+        plan = self.face_size_local_resize_keep_relations_plan(face_id, target_size, axis)
+        if plan["status"] == "blocked":
+            raise ValueError(str(plan["message"]))
+
+        self._remember_face_target_logical_id(plan, face_id)
+        _action_result, result_check = self._run_checked_face_edit(
+            plan,
+            lambda: (
+                self._apply_local_face_deform(plan)
+                if plan.get("owning_face_size_rebuild_mode") == "planar-rebuild"
+                else self._apply_edge_length_affine_transform(plan)
+            ),
+        )
+        return (
+            "Face owning size resize completed with first-level planar relations: "
+            f"face {face_id}, "
+            f"axis={plan.get('face_size_axis')}, "
+            f"current_size={float(plan['current_face_size']):g}, "
+            f"target_size={float(plan['target_face_size']):g}, "
+            f"delta={float(plan['face_size_delta']):g}, "
+            f"scale={float(plan['face_size_scale']):g}, "
+            f"rebuild_mode={plan.get('owning_face_size_rebuild_mode')}, "
+            f"target={plan.get('affine_target_kind')}, "
+            f"risk={plan['risk']}. {result_check}"
+        )
+
     def face_size_owning_scale_preview_polydata(
         self,
         face_id: int,
@@ -8318,7 +8438,10 @@ class OperationMixin:
         matched_face_id: int,
         facts: dict[str, object],
     ) -> str:
-        if plan.get("face_push_pull_planar_relation_constraint_requested") is not True:
+        if (
+            plan.get("face_planar_relation_constraint_requested") is not True
+            and plan.get("face_push_pull_planar_relation_constraint_requested") is not True
+        ):
             return ""
         if str(plan.get("face_push_pull_planar_constraint_status") or "") != "ready":
             raise RuntimeError("Face planar relation check was requested but the original constraint plan is not ready.")

step_editor/window_actions.py

@@ -1507,10 +1507,13 @@ class WindowActionMixin:
             "面面积(缩放特征)",
             "面内长度(局部重建)",
             "面内宽度(局部重建)",
+            "面内长度(保持关系)",
+            "面内宽度(保持关系)",
             "面内长度(缩放特征)",
             "面内宽度(缩放特征)",
             "偏移(局部重建)",
             "中心(局部重建)",
+            "中心(保持关系)",
             "圆柱高度调整",
             "高度(缩放特征)缩放所属对象",
         }
@@ -1531,8 +1534,10 @@ class WindowActionMixin:
             "resize_face_area_local",
             "resize_face_area",
             "resize_face_size_local",
+            "resize_face_size_local_keep_relations",
             "resize_face_size_owning_scale",
             "move_face_center_local",
+            "move_face_center_local_keep_relations",
             "resize_shell_thickness",
             "resize_shell_thickness_owning_scale",
             "resize_cylindrical_height",
@@ -5920,10 +5925,16 @@ class WindowActionMixin:
         )
 
     def resize_face_width_local(self) -> None:
-        self._resize_face_size_local("width")
+        self._resize_face_size_local("width", keep_relations=False)
 
     def resize_face_height_local(self) -> None:
-        self._resize_face_size_local("height")
+        self._resize_face_size_local("height", keep_relations=False)
+
+    def resize_face_width_keep_relations(self) -> None:
+        self._resize_face_size_local("width", keep_relations=True)
+
+    def resize_face_height_keep_relations(self) -> None:
+        self._resize_face_size_local("height", keep_relations=True)
 
     def resize_face_width_owning_scale(self) -> None:
         self._resize_face_size_owning_scale("width")
@@ -5931,12 +5942,13 @@ class WindowActionMixin:
     def resize_face_height_owning_scale(self) -> None:
         self._resize_face_size_owning_scale("height")
 
-    def _resize_face_size_local(self, axis: str) -> None:
+    def _resize_face_size_local(self, axis: str, *, keep_relations: bool) -> None:
         if self.model is None:
             return
         axis_key = "height" if str(axis).lower() == "height" else "width"
         axis_label = "面内宽度" if axis_key == "height" else "面内长度"
-        if self._edit_busy(f"请等待当前编辑完成后再修改{axis_label}(局部重建)。"):
+        mode_label = f"{axis_label}(保持关系)" if keep_relations else f"{axis_label}(局部重建)"
+        if self._edit_busy(f"请等待当前编辑完成后再修改{mode_label}。"):
             return
         if self.selected_face_id is None:
             QMessageBox.information(self, "未选择Face", "请先选择一个平面 Face。")
@@ -5953,10 +5965,13 @@ class WindowActionMixin:
         face_id = self.selected_face_id
         plan = self._quick_blocked_face_size_local_plan(face_id, target_size, axis_key)
         if plan is None:
-            plan = self.model.face_size_local_resize_plan(face_id, target_size, axis_key)
+            if keep_relations:
+                plan = self.model.face_size_local_resize_keep_relations_plan(face_id, target_size, axis_key)
+            else:
+                plan = self.model.face_size_local_resize_plan(face_id, target_size, axis_key)
         lines = [
             f"Face: {face_id}",
-            f"修改对象: {axis_label}(局部重建)",
+            f"修改对象: {mode_label}",
             f"当前面内长度: {_format_value(plan.get('current_face_width'))}",
             f"目标面内长度: {_format_value(plan.get('target_face_width'))}",
             f"当前面内宽度: {_format_value(plan.get('current_face_height'))}",
@@ -5970,21 +5985,23 @@ class WindowActionMixin:
             f"影响目标: {_format_value(plan.get('local_face_deform_target_kind'))}",
         ]
         if not self._confirm_quick_edit_plan(
-            f"{axis_label}(局部重建)",
+            mode_label,
             plan,
             lines,
-            f"{axis_label}(局部重建)已阻止",
-            f"已取消{axis_label}(局部重建)",
+            f"{mode_label}已阻止",
+            f"已取消{mode_label}",
         ):
             return
         self.clear_edit_preview(render=False)
 
         def action():
+            if keep_relations:
+                return self.model.resize_face_size_local_keep_relations(face_id, target_size, axis_key)
             return self.model.resize_face_size_local(face_id, target_size, axis_key)
 
         self._run_edit_action(
             action,
-            operation_name=f"修改{axis_label}(局部重建)",
+            operation_name=f"修改{mode_label}",
             target=f"Face {face_id}",
             parameters={
                 "face_id": face_id,
@@ -6013,6 +6030,11 @@ class WindowActionMixin:
                 "resize_strategy": plan.get("resize_strategy"),
                 "edit_strategy_label": plan.get("edit_strategy_label"),
                 "edit_semantics": plan.get("edit_semantics"),
+                "face_planar_relation_constraint_requested": plan.get("face_planar_relation_constraint_requested"),
+                "face_push_pull_planar_constraint_summary": plan.get("face_push_pull_planar_constraint_summary"),
+                "face_push_pull_planar_constraint_parallel_count": plan.get("face_push_pull_planar_constraint_parallel_count"),
+                "face_push_pull_planar_constraint_perpendicular_count": plan.get("face_push_pull_planar_constraint_perpendicular_count"),
+                "face_push_pull_planar_constraint_angled_count": plan.get("face_push_pull_planar_constraint_angled_count"),
                 "resize_status": plan.get("status"),
                 "resize_risk": plan.get("risk"),
                 "resize_message": plan.get("message"),
@@ -6022,7 +6044,11 @@ class WindowActionMixin:
             },
             target_kind="face",
             target_id=face_id,
-            isolation=self._isolation_for_plan(plan, "resize_face_size_local", [face_id, target_size, axis_key]),
+            isolation=self._isolation_for_plan(
+                plan,
+                "resize_face_size_local_keep_relations" if keep_relations else "resize_face_size_local",
+                [face_id, target_size, axis_key],
+            ),
         )
 
     def _resize_face_size_owning_scale(self, axis: str) -> None:
@@ -6361,9 +6387,16 @@ class WindowActionMixin:
         )
 
     def move_selected_face_center_local(self) -> None:
+        self._move_selected_face_center_local(keep_relations=False)
+
+    def move_selected_face_center_keep_relations(self) -> None:
+        self._move_selected_face_center_local(keep_relations=True)
+
+    def _move_selected_face_center_local(self, *, keep_relations: bool) -> None:
         if self.model is None:
             return
-        if self._edit_busy("请等待当前编辑完成后再执行中心(局部重建)。"):
+        mode_label = "中心(保持关系)" if keep_relations else "中心(局部重建)"
+        if self._edit_busy(f"请等待当前编辑完成后再执行{mode_label}。"):
             return
         if self.selected_face_id is None:
             QMessageBox.information(self, "未选择Face", "请先选择一个平面 Face。")
@@ -6378,9 +6411,9 @@ class WindowActionMixin:
         current_center = self._selected_face_center_for_translation(face_id)
         if current_center is None:
             self._show_immediate_cannot_edit_message(
-                "中心(局部重建)",
+                mode_label,
                 "当前 Face 缺少稳定中心坐标。",
-                "中心(局部重建)已阻止",
+                f"{mode_label}已阻止",
             )
             return
         target_center = (
@@ -6390,7 +6423,10 @@ class WindowActionMixin:
         )
         plan = self._quick_blocked_face_center_local_plan(face_id, target_center)
         if plan is None:
-            plan = self.model.face_center_local_move_plan(face_id, target_center)
+            if keep_relations:
+                plan = self.model.face_center_local_move_keep_relations_plan(face_id, target_center)
+            else:
+                plan = self.model.face_center_local_move_plan(face_id, target_center)
         lines = [
             f"Face: {face_id}",
             f"当前 Face 中心: {_format_value(plan.get('current_face_center'))}",
@@ -6403,21 +6439,23 @@ class WindowActionMixin:
             f"影响目标: {_format_value(plan.get('local_face_deform_target_kind'))}",
         ]
         if not self._confirm_quick_edit_plan(
-            "中心(局部重建)",
+            mode_label,
             plan,
             lines,
-            "中心(局部重建)已阻止",
-            "已取消中心(局部重建)",
+            f"{mode_label}已阻止",
+            f"已取消{mode_label}",
         ):
             return
         self.clear_edit_preview(render=False)
 
         def action():
+            if keep_relations:
+                return self.model.move_face_center_local_keep_relations(face_id, target_center)
             return self.model.move_face_center_local(face_id, target_center)
 
         self._run_edit_action(
             action,
-            operation_name="中心(局部重建)",
+            operation_name=mode_label,
             target=f"Face {face_id}",
             parameters={
                 "face_id": face_id,
@@ -6436,6 +6474,11 @@ class WindowActionMixin:
                 "resize_strategy": plan.get("resize_strategy"),
                 "edit_strategy_label": plan.get("edit_strategy_label"),
                 "edit_semantics": plan.get("edit_semantics"),
+                "face_planar_relation_constraint_requested": plan.get("face_planar_relation_constraint_requested"),
+                "face_push_pull_planar_constraint_summary": plan.get("face_push_pull_planar_constraint_summary"),
+                "face_push_pull_planar_constraint_parallel_count": plan.get("face_push_pull_planar_constraint_parallel_count"),
+                "face_push_pull_planar_constraint_perpendicular_count": plan.get("face_push_pull_planar_constraint_perpendicular_count"),
+                "face_push_pull_planar_constraint_angled_count": plan.get("face_push_pull_planar_constraint_angled_count"),
                 "resize_status": plan.get("status"),
                 "resize_risk": plan.get("risk"),
                 "resize_message": plan.get("message"),
@@ -6445,7 +6488,11 @@ class WindowActionMixin:
             },
             target_kind="face",
             target_id=face_id,
-            isolation=self._isolation_for_plan(plan, "move_face_center_local", [face_id, list(target_center)]),
+            isolation=self._isolation_for_plan(
+                plan,
+                "move_face_center_local_keep_relations" if keep_relations else "move_face_center_local",
+                [face_id, list(target_center)],
+            ),
         )
 
     def move_selected_axis_center_by_translation(self) -> None:

step_editor/window_state.py

@@ -3427,6 +3427,43 @@ class WindowStateMixin:
                 _triple_or_none(action_info.get("area_center"))
                 or _triple_or_none(action_info.get("bbox_center"))
             )
+            keep_relation_fields_present = any(
+                key in action_info
+                for key in (
+                    "first_level_planar_relation_status",
+                    "first_level_planar_relation_count",
+                    "first_level_planar_relation_angled_count",
+                    "first_level_planar_relation_non_planar_face_ids",
+                    "first_level_adjacent_surface_types",
+                )
+            )
+            face_keep_relation_enabled = bool(is_plane)
+            face_keep_relation_disabled_tip = "当前对象不是平面 Face，不能保持一级平面关系。"
+            if face_keep_relation_enabled and keep_relation_fields_present:
+                relation_status = str(action_info.get("first_level_planar_relation_status") or "")
+                relation_count = _int_or_none(action_info.get("first_level_planar_relation_count")) or 0
+                angled_count = _int_or_none(action_info.get("first_level_planar_relation_angled_count")) or 0
+                non_planar_face_ids = _int_values(action_info.get("first_level_planar_relation_non_planar_face_ids"))
+                adjacent_surfaces = tuple(action_info.get("first_level_adjacent_surface_types") or ())
+                non_plane_adjacent_surfaces = tuple(
+                    item
+                    for item in adjacent_surfaces
+                    if isinstance(item, (tuple, list))
+                    and len(item) >= 2
+                    and str(item[1]) != "plane"
+                )
+                if non_planar_face_ids or non_plane_adjacent_surfaces:
+                    face_keep_relation_enabled = False
+                    face_keep_relation_disabled_tip = "一级相邻 Face 中包含非平面/曲面，当前“保持关系”只支持平面邻域。"
+                elif angled_count > 0:
+                    face_keep_relation_enabled = False
+                    face_keep_relation_disabled_tip = "一级相邻平面中存在斜交关系，当前“保持关系”只支持平行/垂直。"
+                elif relation_status != "ready":
+                    face_keep_relation_enabled = False
+                    face_keep_relation_disabled_tip = "当前一级平面关系还不可验证，不能使用“保持关系”。"
+                elif relation_count <= 0:
+                    face_keep_relation_enabled = False
+                    face_keep_relation_disabled_tip = "当前一级邻域没有识别到可保持的平行/垂直平面关系。"
             if is_plane:
                 current_face_width = _float_or_none(action_info.get("local_face_width"))
                 current_face_height = _float_or_none(action_info.get("local_face_height"))
@@ -3461,6 +3498,31 @@ class WindowStateMixin:
                             ),
                             "range_hint": f"{face_size_tip} {relative_range_hint(current_face_width, 0.25, 0.8, face_linear_hard_limit)}",
                         },
+                        "keep_relations": {
+                            "label": "保持关系",
+                            "action": "resize_face_width_keep_relations",
+                            "target_attr": "face_width_input",
+                            "enabled": bool(
+                                current_face_width is not None
+                                and current_face_width > 0
+                                and current_face_center is not None
+                                and (self.selected_part_id is not None or self.selected_solid_id is not None)
+                                and face_keep_relation_enabled
+                            ),
+                            "enabled_tip": (
+                                "输入目标面内长度；程序会沿该方向缩放所属特征或 Solid，"
+                                "并要求一级相邻平面的平行/垂直关系在执行前可验证、执行后可反查。"
+                            ),
+                            "disabled_tip": (
+                                face_keep_relation_disabled_tip
+                                if not face_keep_relation_enabled
+                                else "当前 Face 缺少稳定面内长度、中心坐标或所属对象，不能保持关系地修改面内长度。"
+                            ),
+                            "range_hint": (
+                                "保持关系会把面内长度修改转换为所属对象单向缩放，并在结果上反查一级平面关系；"
+                                f"{relative_range_hint(current_face_width, 0.25, 0.8, face_linear_hard_limit)}"
+                            ),
+                        },
                         "owning": {
                             "label": "缩放特征",
                             "action": "resize_face_width_owning_scale",
@@ -3503,6 +3565,31 @@ class WindowStateMixin:
                             ),
                             "range_hint": f"{face_size_tip} {relative_range_hint(current_face_height, 0.25, 0.8, face_linear_hard_limit)}",
                         },
+                        "keep_relations": {
+                            "label": "保持关系",
+                            "action": "resize_face_height_keep_relations",
+                            "target_attr": "face_height_input",
+                            "enabled": bool(
+                                current_face_height is not None
+                                and current_face_height > 0
+                                and current_face_center is not None
+                                and (self.selected_part_id is not None or self.selected_solid_id is not None)
+                                and face_keep_relation_enabled
+                            ),
+                            "enabled_tip": (
+                                "输入目标面内宽度；程序会沿该方向缩放所属特征或 Solid，"
+                                "并要求一级相邻平面的平行/垂直关系在执行前可验证、执行后可反查。"
+                            ),
+                            "disabled_tip": (
+                                face_keep_relation_disabled_tip
+                                if not face_keep_relation_enabled
+                                else "当前 Face 缺少稳定面内宽度、中心坐标或所属对象，不能保持关系地修改面内宽度。"
+                            ),
+                            "range_hint": (
+                                "保持关系会把面内宽度修改转换为所属对象单向缩放，并在结果上反查一级平面关系；"
+                                f"{relative_range_hint(current_face_height, 0.25, 0.8, face_linear_hard_limit)}"
+                            ),
+                        },
                         "owning": {
                             "label": "缩放特征",
                             "action": "resize_face_height_owning_scale",
@@ -3549,6 +3636,33 @@ class WindowStateMixin:
                         "transform_context": {"current_center": current_face_center},
                         **face_vector_move_limit(current_face_center),
                     },
+                    "keep_relations": {
+                        "label": "保持关系",
+                        "action": "move_selected_face_center_keep_relations",
+                        "target_attrs": ("translate_x_input", "translate_y_input", "translate_z_input"),
+                        "enabled": bool(
+                            is_plane
+                            and current_face_center is not None
+                            and (self.selected_part_id is not None or self.selected_solid_id is not None)
+                            and face_keep_relation_enabled
+                        ),
+                        "enabled_tip": (
+                            "输入这个 Face 中心要移动到的目标 X, Y, Z 坐标；程序会平移所属特征或 Solid，"
+                            "并要求一级相邻平面的平行/垂直关系在执行前可验证、执行后可反查。"
+                        ),
+                        "disabled_tip": (
+                            face_keep_relation_disabled_tip
+                            if not face_keep_relation_enabled
+                            else "当前 Face 缺少稳定中心坐标或所属对象，不能保持关系地修改中心位置。"
+                        ),
+                        "range_hint": (
+                            "保持关系会把中心修改转换为所属对象平移，并在结果上反查一级平面关系；"
+                            f"{translation_hint()} {face_center_hard_limit}"
+                        ),
+                        "target_transform": "target_center_to_translation",
+                        "transform_context": {"current_center": current_face_center},
+                        **face_vector_move_limit(current_face_center),
+                    },
                     "owning": {
                         "label": "移动特征",
                         "action": "move_selected_face_center",