render: constrain shrink-wrapped grid items

vendor/taffy/src/style/float.rs

@@ -0,0 +1,80 @@
+//! Style types for float layout
+
+/// Floats a box to the left or right.
+/// This property only applies to children of a block layout
+///
+/// See <https://developer.mozilla.org/en-US/docs/Web/CSS/float>
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+pub enum Float {
+    /// The box is floated to the left
+    Left,
+    /// The box is floated to the right
+    Right,
+    /// The box is not floated
+    #[default]
+    None,
+}
+
+#[cfg(feature = "parse")]
+crate::util::parse::impl_parse_for_keyword_enum!(Float,
+    "left" => Left,
+    "right" => Right,
+    "none" => None,
+);
+
+/// Whether a box that is definitely floated is floated to the left
+/// of to the right.
+///
+/// This type is only used in the low-level parts of the
+#[derive(Debug, Copy, Clone, PartialEq, Eq)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[repr(u8)]
+pub enum FloatDirection {
+    /// The box is floated to the left
+    Left = 0,
+    /// The box is floated to the right
+    Right = 1,
+}
+
+impl Float {
+    /// Whether the box is floated
+    pub fn is_floated(self) -> bool {
+        matches!(self, Self::Left | Self::Right)
+    }
+
+    /// Converts [`Float`] into `Option<FloatDirection>`ca
+    pub fn float_direction(&self) -> Option<FloatDirection> {
+        match self {
+            Float::Left => Some(FloatDirection::Left),
+            Float::Right => Some(FloatDirection::Right),
+            Float::None => None,
+        }
+    }
+}
+
+/// Gives a box "clearance", which moves it below floated boxes which precede
+/// it in the tree.
+///
+/// See <https://developer.mozilla.org/en-US/docs/Web/CSS/clear>
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+pub enum Clear {
+    /// The box clears left-floated boxes
+    Left,
+    /// The box clears right-floated boxes
+    Right,
+    /// The box clears boxes floated in either direction
+    Both,
+    /// The box does not clear floated boxes
+    #[default]
+    None,
+}
+
+#[cfg(feature = "parse")]
+crate::util::parse::impl_parse_for_keyword_enum!(Clear,
+    "left" => Left,
+    "right" => Right,
+    "both" => Both,
+    "none" => None,
+);