constrain both axis

CHANGELOG.md

@@ -8,17 +8,22 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ## Unreleased
 
 
+### Added
+
+- Added support for A-F to Digits widget https://github.com/Textualize/textual/pull/5094
+- Added `Region.constrain` https://github.com/Textualize/textual/pull/5097
+- Added support for A-F to Digits widget https://github.com/Textualize/textual/pull/5094
+
 ### Changed
 
 - `Screen.ALLOW_IN_MAXIMIZED_VIEW` will now default to `App.ALLOW_IN_MAXIMIZED_VIEW` https://github.com/Textualize/textual/pull/5088
 - Widgets matching `.-textual-system` will now be included in the maximize view by default https://github.com/Textualize/textual/pull/5088
 - Digits are now thin by default, style with text-style: bold to get bold digits https://github.com/Textualize/textual/pull/5094
+- Made `Widget.absolute_offset` public https://github.com/Textualize/textual/pull/5097
+- Tooltips are now displayed directly below the mouse cursor https://github.com/Textualize/textual/pull/5097
+- `Region.inflect` will now assume that margins overlap https://github.com/Textualize/textual/pull/5097
 - `Pilot.click` and friends will now accept a widget, in addition to a selector https://github.com/Textualize/textual/pull/5095
 
-### Added
-
-- Added support for A-F to Digits widget https://github.com/Textualize/textual/pull/5094
-
 ## [0.82.0] - 2024-10-03
 
 ### Fixed

pyproject.toml

@@ -79,7 +79,7 @@ pytest-textual-snapshot = "^1.0.0"
 [tool.pytest.ini_options]
 asyncio_mode = "auto"
 testpaths = ["tests"]
-addopts = "--strict-markers"
+addopts = "--strict-markers -vv"
 markers = [
     "syntax: marks tests that require syntax highlighting (deselect with '-m \"not syntax\"')",
 ]

src/textual/_compositor.py

@@ -40,7 +40,6 @@
 if TYPE_CHECKING:
     from typing_extensions import TypeAlias
 
-    from textual.css.styles import RenderStyles
     from textual.screen import Screen
     from textual.widget import Widget
 
@@ -522,38 +521,6 @@ def visible_widgets(self) -> dict[Widget, tuple[Region, Region]]:
             }
         return self._visible_widgets
 
-    def _constrain(
-        self, styles: RenderStyles, region: Region, constrain_region: Region
-    ) -> Region:
-        """Applies constrain logic to a Region.
-
-        Args:
-            styles: The widget's styles.
-            region: The region to constrain.
-            constrain_region: The outer region.
-
-        Returns:
-            New region.
-        """
-        constrain = styles.constrain
-        if constrain == "inflect":
-            inflect_margin = styles.margin
-            margin_region = region.grow(inflect_margin)
-            region = region.inflect(
-                (-1 if margin_region.right > constrain_region.right else 0),
-                (-1 if margin_region.bottom > constrain_region.bottom else 0),
-                inflect_margin,
-            )
-            region = region.translate_inside(constrain_region, True, True)
-        elif constrain != "none":
-            # Constrain to avoid clipping
-            region = region.translate_inside(
-                constrain_region,
-                constrain in ("x", "both"),
-                constrain in ("y", "both"),
-            )
-        return region
-
     def _arrange_root(
         self, root: Widget, size: Size, visible_only: bool = True
     ) -> tuple[CompositorMap, set[Widget]]:
@@ -688,10 +655,17 @@ def add_widget(
 
                         widget_order = order + ((layer_index, z, layer_order),)
 
-                        if overlay and sub_widget.styles.constrain != "none":
-                            widget_region = self._constrain(
-                                sub_widget.styles, widget_region, no_clip
-                            )
+                        if overlay:
+                            styles = sub_widget.styles
+                            has_rule = styles.has_rule
+                            if has_rule("constrain_x") or has_rule("constrain_y"):
+                                widget_region = widget_region.constrain(
+                                    styles.constrain_x,
+                                    styles.constrain_y,
+                                    styles.margin,
+                                    no_clip,
+                                )
+
                         if widget._cover_widget is None:
                             add_widget(
                                 sub_widget,
@@ -739,13 +713,22 @@ def add_widget(
 
                 widget_region = region + layout_offset
 
-                if widget._absolute_offset is not None:
-                    widget_region = widget_region.reset_offset.translate(
-                        widget._absolute_offset + widget.styles.margin.top_left
+                if widget.absolute_offset is not None:
+                    margin = styles.margin
+                    widget_region = widget_region.at_offset(
+                        widget.absolute_offset + margin.top_left
+                    )
+                    widget_region = widget_region.translate(
+                        styles.offset.resolve(widget_region.grow(margin).size, size)
+                    )
+                has_rule = styles.has_rule
+                if has_rule("constrain_x") or has_rule("constrain_y"):
+                    widget_region = widget_region.constrain(
+                        styles.constrain_x,
+                        styles.constrain_y,
+                        styles.margin,
+                        size.region,
                     )
-
-                if styles.constrain != "none":
-                    widget_region = self._constrain(styles, widget_region, no_clip)
 
                 map[widget._render_widget] = _MapGeometry(
                     widget_region,

src/textual/css/_style_properties.py

@@ -68,6 +68,7 @@
 
 PropertyGetType = TypeVar("PropertyGetType")
 PropertySetType = TypeVar("PropertySetType")
+EnumType = TypeVar("EnumType", covariant=True)
 
 
 class GenericProperty(Generic[PropertyGetType, PropertySetType]):
@@ -773,7 +774,7 @@ def __set__(
                 obj.refresh(layout=True)
 
 
-class StringEnumProperty:
+class StringEnumProperty(Generic[EnumType]):
     """Descriptor for getting and setting string properties and ensuring that the set
     value belongs in the set of valid values.
 
@@ -787,7 +788,7 @@ class StringEnumProperty:
     def __init__(
         self,
         valid_values: set[str],
-        default: str,
+        default: EnumType,
         layout: bool = False,
         refresh_children: bool = False,
         refresh_parent: bool = False,
@@ -801,7 +802,9 @@ def __init__(
     def __set_name__(self, owner: StylesBase, name: str) -> None:
         self.name = name
 
-    def __get__(self, obj: StylesBase, objtype: type[StylesBase] | None = None) -> str:
+    def __get__(
+        self, obj: StylesBase, objtype: type[StylesBase] | None = None
+    ) -> EnumType:
         """Get the string property, or the default value if it's not set.
 
         Args:
@@ -816,7 +819,7 @@ def __get__(self, obj: StylesBase, objtype: type[StylesBase] | None = None) -> s
     def _before_refresh(self, obj: StylesBase, value: str | None) -> None:
         """Do any housekeeping before asking for a layout refresh after a value change."""
 
-    def __set__(self, obj: StylesBase, value: str | None = None):
+    def __set__(self, obj: StylesBase, value: EnumType | None = None):
         """Set the string property and ensure it is in the set of allowed values.
 
         Args:

src/textual/css/_styles_builder.py

@@ -1047,6 +1047,40 @@ def process_overlay(self, name: str, tokens: list[Token]) -> None:
             self.styles._rules[name] = value  # type: ignore
 
     def process_constrain(self, name: str, tokens: list[Token]) -> None:
+        if len(tokens) == 1:
+            try:
+                value = self._process_enum(name, tokens, VALID_CONSTRAIN)
+            except StyleValueError:
+                self.error(
+                    name,
+                    tokens[0],
+                    string_enum_help_text(name, VALID_CONSTRAIN, context="css"),
+                )
+            else:
+                self.styles._rules["constrain_x"] = value  # type: ignore
+                self.styles._rules["constrain_y"] = value  # type: ignore
+        elif len(tokens) == 2:
+            constrain_x, constrain_y = self._process_enum_multiple(
+                name, tokens, VALID_CONSTRAIN, 2
+            )
+            self.styles._rules["constrain_x"] = constrain_x  # type: ignore
+            self.styles._rules["constrain_y"] = constrain_y  # type: ignore
+        else:
+            self.error(name, tokens[0], "one or two values expected here")
+
+    def process_constrain_x(self, name: str, tokens: list[Token]) -> None:
+        try:
+            value = self._process_enum(name, tokens, VALID_CONSTRAIN)
+        except StyleValueError:
+            self.error(
+                name,
+                tokens[0],
+                string_enum_help_text(name, VALID_CONSTRAIN, context="css"),
+            )
+        else:
+            self.styles._rules[name] = value  # type: ignore
+
+    def process_constrain_y(self, name: str, tokens: list[Token]) -> None:
         try:
             value = self._process_enum(name, tokens, VALID_CONSTRAIN)
         except StyleValueError:

src/textual/css/constants.py

@@ -74,7 +74,7 @@
     "nocolor",
 }
 VALID_OVERLAY: Final = {"none", "screen"}
-VALID_CONSTRAIN: Final = {"x", "y", "both", "inflect", "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/styles.py

@@ -190,7 +190,8 @@ class RulesMap(TypedDict, total=False):
     hatch: tuple[str, Color] | Literal["none"]
 
     overlay: Overlay
-    constrain: Constrain
+    constrain_x: Constrain
+    constrain_y: Constrain
 
 
 RULE_NAMES = list(RulesMap.__annotations__.keys())
@@ -450,7 +451,12 @@ class StylesBase:
     overlay = StringEnumProperty(
         VALID_OVERLAY, "none", layout=True, refresh_parent=True
     )
-    constrain = StringEnumProperty(VALID_CONSTRAIN, "none")
+    constrain_x: StringEnumProperty[Constrain] = StringEnumProperty(
+        VALID_CONSTRAIN, "none"
+    )
+    constrain_y: StringEnumProperty[Constrain] = StringEnumProperty(
+        VALID_CONSTRAIN, "none"
+    )
 
     def __textual_animation__(
         self,
@@ -1172,8 +1178,18 @@ def append_declaration(name: str, value: str) -> None:
             append_declaration("subtitle-text-style", str(self.border_subtitle_style))
         if "overlay" in rules:
             append_declaration("overlay", str(self.overlay))
-        if "constrain" in rules:
-            append_declaration("constrain", str(self.constrain))
+        if "constrain_x" in rules and "constrain_y" in rules:
+            if self.constrain_x == self.constrain_y:
+                append_declaration("constrain", self.constrain_x)
+            else:
+                append_declaration(
+                    "constrain", f"{self.constrain_x} {self.constrain_y}"
+                )
+        elif "constrain_x" in rules:
+            append_declaration("constrain-x", self.constrain_x)
+        elif "constrain_y" in rules:
+            append_declaration("constrain-y", self.constrain_y)
+
         if "keyline" in rules:
             keyline_type, keyline_color = self.keyline
             if keyline_type != "none":

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", "x", "y", "both"]
+Constrain = Literal["none", "inflect", "inside"]
 Overlay = Literal["none", "screen"]
 
 Specificity3 = Tuple[int, int, int]