Struct Min 

pub struct Min(/* private fields */);

A lower clamp on one axis: a number of logical px, or the node’s own fit size on that axis (minWidth: "fit", Min::FIT). FIT is what lets a Grow child keep a content floor — CSS’s flex: 1 0 auto: the tabs of an i3-style bar split the bar evenly while they fit and sit at their label’s width, scrolling, once they do not. Layout resolves it to a number in the fit pass of its axis (layout::fit_widths / fit_heights), so every later clamp reads one; until then it clamps like no floor at all.

Undeclared is Min::AUTO, which clamps as 0 everywhere but one place: a child giving in an overflowing row that holds a share of the room, where it is CSS’s min-width: auto — the child’s min-content, the widest thing in it that cannot wrap (backlog RG92). A declared 0 (minWidth: 0, Min::px(0.0)) is no floor there either, as CSS’s min-width: 0 is how a flex item is let go below its content.

One f32, with FIT as a negative — the form KuiSpec.min_w takes too (KUI_MIN_FIT) — rather than an enum with a tag: LayoutSpec is copied per node per frame, and a tagged pair for two axes is eight bytes on every node for a floor almost none declares (C15). A negative floor never meant anything, so the slot was free.

Implementations

impl Min

pub const FIT: Min

The node’s own fit size on this axis.

pub const AUTO: Min

No floor declared: the node’s min-content where a share of the room gives in CSS’s way (backlog RG92) and down a column of fit children (F114); 0 across a run of fit children alone, across a column, where a fit node is held to the column’s box (F116), and for a node that scrolls or clips. Negative zero, so it is 0 to every clamp and to ==, and told apart from a declared 0 by its sign alone (Min::is_auto).

pub fn px(v: f32) -> Min

A floor of v logical px; a negative (or NaN) is a floor of 0, declared — no automatic one either.

pub fn is_auto(self) -> bool

Whether no floor was declared (Min::AUTO).

pub fn is_fit(self) -> bool

Whether this is the unresolved fit floor.

pub fn calc(c: Calc) -> Min

A floor that is a size expression, until layout resolves it (backlog F109): −2 − its number, below FIT’s −1.

pub fn as_calc(self) -> Option<Calc>

The size expression this floor waits on, if it is one.

pub fn resolved(self) -> f32

The clamp as a number: the px it holds, or 0 for a FIT or a calc layout has not resolved yet (nothing to floor at).

Trait Implementations

impl Clone for Min

fn clone(&self) -> Min

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Min

impl Debug for Min

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Default for Min

fn default() -> Min

Returns the “default value” for a type.

impl From<Min> for Bound

fn from(m: Min) -> Bound

Converts to this type from the input type.

impl From<f32> for Min

fn from(v: f32) -> Min

Converts to this type from the input type.

impl PartialEq for Min

fn eq(&self, other: &Min) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Min