fix: improve personal space layout editing

scenes/Maps/PersonalSpace.gd

@@ -23,7 +23,8 @@ const DECOR_TEXTURE_FILTER: int = CanvasItem.TEXTURE_FILTER_LINEAR
 const DECOR_COLLISION_LAYER: int = 1
 const DECOR_COLLISION_MASK: int = 1
 const ROOM_GRID_SIZE: float = 16.0
-const ROOM_PLACE_BOUNDS: Rect2 = Rect2(-426.0, -186.0, 852.0, 398.0)
+const FLOOR_PLACE_BOUNDS: Rect2 = Rect2(-426.0, -186.0, 852.0, 398.0)
+const WALL_PLACE_BOUNDS: Rect2 = Rect2(-378.0, -258.0, 756.0, 72.0)
 
 @onready var player: PlayerController = $YSortWorld/Characters/Players/Player
 @onready var playerCamera: Camera2D = $YSortWorld/Characters/Players/Player/Camera2D
@@ -32,6 +33,7 @@ const ROOM_PLACE_BOUNDS: Rect2 = Rect2(-426.0, -186.0, 852.0, 398.0)
 @onready var staticCollision: Node2D = $StaticCollision
 
 var _decorLayer: Node2D
+var _gridOverlay: Node2D
 var _inventoryRequest: HTTPRequest
 var _inventoryPanel: PanelContainer
 var _inventoryGrid: GridContainer
@@ -43,6 +45,7 @@ var _layoutStatusLabel: Label
 var _escHintLabel: Label
 var _editButton: Button
 var _backpackButton: Button
+var _gridButton: Button
 var _undoButton: Button
 var _redoButton: Button
 var _rotateButton: Button
@@ -67,6 +70,7 @@ var _visitorMode: bool = false
 var _visitorOwnerId: String = ""
 var _visitorOwnerName: String = ""
 var _editMode: bool = false
+var _showPlacementGrid: bool = false
 var _undoHistory: Array[Dictionary] = []
 var _redoHistory: Array[Dictionary] = []
 var _dirtyDecorIds: Dictionary = {}
@@ -191,6 +195,41 @@ func _build_decor_layer() -> void:
 	_decorLayer.y_sort_enabled = true
 	ySortWorld.add_child(_decorLayer)
 	ySortWorld.move_child(_decorLayer, 0)
+	_build_placement_grid()
+
+func _build_placement_grid() -> void:
+	_gridOverlay = Node2D.new()
+	_gridOverlay.name = "RoomPlacementGrid"
+	_gridOverlay.z_index = -30
+	_gridOverlay.visible = false
+	ySortWorld.add_child(_gridOverlay)
+	ySortWorld.move_child(_gridOverlay, 0)
+	_add_grid_zone(FLOOR_PLACE_BOUNDS, Color(0.050, 0.560, 0.900, 0.20), Color(0.050, 0.560, 0.900, 0.62))
+	_add_grid_zone(WALL_PLACE_BOUNDS, Color(0.620, 0.330, 0.860, 0.20), Color(0.620, 0.330, 0.860, 0.62))
+
+func _add_grid_zone(bounds: Rect2, line_color: Color, edge_color: Color) -> void:
+	if _gridOverlay == null:
+		return
+	var x: float = ceilf(bounds.position.x / ROOM_GRID_SIZE) * ROOM_GRID_SIZE
+	while x < bounds.end.x:
+		_add_grid_line(Vector2(x, bounds.position.y), Vector2(x, bounds.end.y), line_color, 1.0)
+		x += ROOM_GRID_SIZE
+	var y: float = ceilf(bounds.position.y / ROOM_GRID_SIZE) * ROOM_GRID_SIZE
+	while y < bounds.end.y:
+		_add_grid_line(Vector2(bounds.position.x, y), Vector2(bounds.end.x, y), line_color, 1.0)
+		y += ROOM_GRID_SIZE
+	_add_grid_line(bounds.position, Vector2(bounds.end.x, bounds.position.y), edge_color, 2.0)
+	_add_grid_line(Vector2(bounds.end.x, bounds.position.y), bounds.end, edge_color, 2.0)
+	_add_grid_line(bounds.end, Vector2(bounds.position.x, bounds.end.y), edge_color, 2.0)
+	_add_grid_line(Vector2(bounds.position.x, bounds.end.y), bounds.position, edge_color, 2.0)
+
+func _add_grid_line(from: Vector2, to: Vector2, color: Color, width: float) -> void:
+	var line := Line2D.new()
+	line.points = PackedVector2Array([from, to])
+	line.default_color = color
+	line.width = width
+	line.antialiased = true
+	_gridOverlay.add_child(line)
 
 func _build_room_decor_requests() -> void:
 	_inventoryRequest = HTTPRequest.new()
@@ -355,6 +394,7 @@ func _build_room_toolbar() -> void:
 
 	_editButton = _create_toolbar_button("编辑布局", func() -> void: _set_edit_mode(true))
 	_backpackButton = _create_toolbar_button("背包", _toggle_inventory_panel)
+	_gridButton = _create_toolbar_button("网格：关", _toggle_placement_grid)
 	_undoButton = _create_toolbar_button("撤销", _undo_last_change)
 	_redoButton = _create_toolbar_button("重做", _redo_last_change)
 	_rotateButton = _create_toolbar_button("旋转", _rotate_selected_decor)
@@ -364,6 +404,7 @@ func _build_room_toolbar() -> void:
 	_finishEditButton = _create_toolbar_button("完成编辑", _request_finish_edit)
 	row.add_child(_editButton)
 	row.add_child(_backpackButton)
+	row.add_child(_gridButton)
 	row.add_child(_undoButton)
 	row.add_child(_redoButton)
 	row.add_child(_rotateButton)
@@ -770,7 +811,7 @@ func _finish_decor_drag() -> void:
 	var decorId := str(_draggedDecor.get_meta("decor_id", ""))
 	if _decorItems.has(decorId):
 		var item: Dictionary = _decorItems[decorId]
-		var snapped_position := _snap_to_room_grid(_draggedDecor.global_position)
+		var snapped_position := _snap_to_room_grid(_draggedDecor.global_position, item)
 		_draggedDecor.global_position = snapped_position
 		item["position_x"] = snapped_position.x
 		item["position_y"] = snapped_position.y
@@ -793,10 +834,10 @@ func _finish_decor_drag() -> void:
 
 func _update_dragged_decor_position() -> void:
 	if _draggedDecor != null:
-		_draggedDecor.global_position = _constrain_room_position(get_global_mouse_position() + _dragOffset)
 		var decorId := str(_draggedDecor.get_meta("decor_id", ""))
 		if not decorId.is_empty() and _decorItems.has(decorId):
 			var item: Dictionary = _decorItems[decorId]
+			_draggedDecor.global_position = _constrain_room_position(get_global_mouse_position() + _dragOffset, item)
 			item["position_x"] = _draggedDecor.global_position.x
 			item["position_y"] = _draggedDecor.global_position.y
 			_sync_decor_collision(decorId, item)
@@ -889,11 +930,12 @@ func _on_decor_save_succeeded(savedItem: Dictionary) -> void:
 	if decorId.is_empty() or not _saveAwaitingIds.has(decorId):
 		return
 	_serverDecorItems[decorId] = item.duplicate(true)
+	_decorItems[decorId] = item.duplicate(true)
 	_saveAwaitingIds.erase(decorId)
-	if _decorItems.has(decorId) and _placement_signature(_decorItems[decorId]) == _placement_signature(item):
 	_dirtyDecorIds.erase(decorId)
-	else:
-		_dirtyDecorIds[decorId] = true
+	_saveFailedIds.erase(decorId)
+	_render_placed_decors()
+	_render_inventory_list()
 	_finalize_save_if_ready()
 
 func _can_edit_layout() -> bool:
@@ -912,6 +954,8 @@ func _set_edit_mode(enabled: bool) -> void:
 	_undoHistory.clear()
 	_redoHistory.clear()
 	_resetArmed = false
+	_showPlacementGrid = false
+	_update_placement_grid_visibility()
 	_refresh_decor_selection()
 	_update_editor_toolbar()
 	_show_toast("布局编辑已开启；改动会在点击保存后提交")
@@ -936,6 +980,8 @@ func _end_edit_session() -> void:
 	_redoHistory.clear()
 	_resetArmed = false
 	_exitAfterSave = false
+	_showPlacementGrid = false
+	_update_placement_grid_visibility()
 	if is_instance_valid(_inventoryPanel):
 		_inventoryPanel.visible = false
 	_hide_unsaved_dialog()
@@ -975,6 +1021,10 @@ func _update_editor_toolbar() -> void:
 	if is_instance_valid(_backpackButton):
 		_backpackButton.visible = _editMode
 		_backpackButton.disabled = _saveInProgress
+	if is_instance_valid(_gridButton):
+		_gridButton.visible = _editMode
+		_gridButton.disabled = _saveInProgress
+		_gridButton.text = "网格：开" if _showPlacementGrid else "网格：关"
 	if is_instance_valid(_finishEditButton):
 		_finishEditButton.visible = _editMode
 		_finishEditButton.disabled = _saveInProgress
@@ -1015,6 +1065,18 @@ func _update_editor_toolbar() -> void:
 		_escHintLabel.visible = _editMode
 		_escHintLabel.text = "Esc 结束编辑" if _editMode else ""
 
+func _toggle_placement_grid() -> void:
+	if not _can_edit_layout():
+		return
+	_showPlacementGrid = not _showPlacementGrid
+	_update_placement_grid_visibility()
+	_update_editor_toolbar()
+	_show_toast("已显示摆放网格（蓝色：地面，紫色：墙面）" if _showPlacementGrid else "已隐藏摆放网格")
+
+func _update_placement_grid_visibility() -> void:
+	if is_instance_valid(_gridOverlay):
+		_gridOverlay.visible = _editMode and _showPlacementGrid
+
 func _record_item_change(before: Dictionary, after: Dictionary) -> void:
 	if before == after:
 		return
@@ -1171,6 +1233,7 @@ func _save_layout(exit_after_save: bool = false) -> void:
 		return
 	_saveInProgress = true
 	_exitAfterSave = exit_after_save
+	_hide_unsaved_dialog()
 	_saveAwaitingIds.clear()
 	_saveFailedIds.clear()
 	for decor_id in save_ids:
@@ -1291,18 +1354,23 @@ func _leave_visited_room() -> void:
 	if not SceneManager.return_from_room_visit():
 		SceneManager.change_scene("square")
 
-func _constrain_room_position(position: Vector2) -> Vector2:
+func _placement_bounds_for_item(item: Dictionary) -> Rect2:
+	return WALL_PLACE_BOUNDS if str(item.get("placement_surface", "floor")) == "wall" else FLOOR_PLACE_BOUNDS
+
+func _constrain_room_position(position: Vector2, item: Dictionary) -> Vector2:
+	var bounds := _placement_bounds_for_item(item)
 	return Vector2(
-		clampf(position.x, ROOM_PLACE_BOUNDS.position.x, ROOM_PLACE_BOUNDS.end.x),
-		clampf(position.y, ROOM_PLACE_BOUNDS.position.y, ROOM_PLACE_BOUNDS.end.y)
+		clampf(position.x, bounds.position.x, bounds.end.x),
+		clampf(position.y, bounds.position.y, bounds.end.y)
 	)
 
-func _snap_to_room_grid(position: Vector2) -> Vector2:
-	var constrained := _constrain_room_position(position)
-	return Vector2(
+func _snap_to_room_grid(position: Vector2, item: Dictionary) -> Vector2:
+	var constrained := _constrain_room_position(position, item)
+	var snapped := Vector2(
 		roundf(constrained.x / ROOM_GRID_SIZE) * ROOM_GRID_SIZE,
 		roundf(constrained.y / ROOM_GRID_SIZE) * ROOM_GRID_SIZE
 	)
+	return _constrain_room_position(snapped, item)
 
 func _is_point_inside_sprite(node: Sprite2D, worldPosition: Vector2) -> bool:
 	if node.texture == null: