fix constrain

Author: willmcgugan

src/textual/_compositor.py

@@ -557,8 +557,8 @@ def _constrain(
 
         region = region.translate_inside(
             constrain_region.shrink(styles.margin),
-            constrain_x == "limit",
-            constrain_y == "limit",
+            constrain_x == "inside",
+            constrain_y == "inside",
         )
 
         return region
@@ -704,6 +704,7 @@ def add_widget(
                             widget_region = self._constrain(
                                 sub_widget.styles, widget_region, no_clip
                             )
+
                         if widget._cover_widget is None:
                             add_widget(
                                 sub_widget,

src/textual/css/constants.py

@@ -74,7 +74,7 @@
     "nocolor",
 }
 VALID_OVERLAY: Final = {"none", "screen"}
-VALID_CONSTRAIN: Final = {"inflect", "limit", "none"}
+VALID_CONSTRAIN: Final = {"inflect", "inside", "none"}
 VALID_KEYLINE: Final = {"none", "thin", "heavy", "double"}
 VALID_HATCH: Final = {"left", "right", "cross", "vertical", "horizontal"}
 HATCHES: Final = {

src/textual/css/types.py

@@ -36,7 +36,7 @@
 Overflow = Literal["scroll", "hidden", "auto"]
 EdgeStyle = Tuple[EdgeType, Color]
 TextAlign = Literal["left", "start", "center", "right", "end", "justify"]
-Constrain = Literal["none", "inflect", "limit"]
+Constrain = Literal["none", "inflect", "inside"]
 Overlay = Literal["none", "screen"]
 
 Specificity3 = Tuple[int, int, int]

src/textual/widgets/_select.py

@@ -218,7 +218,7 @@ class Select(Generic[SelectType], Vertical, can_focus=True):
             height: auto;
             max-height: 12;
             overlay: screen;
-            constrain: y;
+            constrain: none inside;
         }
 
         &:focus > SelectCurrent {

src/textual/widgets/_tooltip.py

@@ -13,7 +13,7 @@ class Tooltip(Static, inherit_css=False):
         background: $background;
         width: auto;
         height: auto;
-        constrain: limit inflect;
+        constrain: inside inflect;
         max-width: 40;
         display: none;
         offset-x: -50%;