package toffee

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CSS layout engine for OCaml (Flexbox, Grid, Block)

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dune-project
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Authors

  1. Thibaut Mattio

Maintainers

  1. Thibaut Mattio

Sources

mosaic-0.1.0.tbz
sha256=9e4e90d17f9b2af1b07071fe425bc2c519c849c4f1d1ab73cde512be2d874849
sha512=06e9c4a741590942e81a27738d0b5c0413fafec8cf3b7dae047ad69f155e7b718aa4223818dc161b7d028efffcfd3365905e264d6fd31d453910ddfa91dcf9b9

doc/toffee.geometry/Geometry/Size/index.html

Module Geometry.SizeSource

2-dimensional size representation.

A generic container representing width and height extents. The type is polymorphic over the contained value type, enabling concrete sizes (float t), optional sizes (float option t), and dimension-typed sizes.

All operations preserve type safety and handle axis-specific transformations through abstract and absolute axis types.

Sourcetype 'a t = {
  1. width : 'a;
  2. height : 'a;
}

'a t represents a 2-dimensional size with width and height of type 'a.

Constants

Sourceval zero : float t

zero is a size with both width and height set to 0.0.

Sourceval none : 'a option t

none is a size with both width and height set to None.

Creation

Sourceval make : 'a -> 'a -> 'a t

make width height creates a size.

Sourceval square : 'a -> 'a t

square side creates a size with equal width and height.

Arithmetic Operations

Sourceval add : float t -> float t -> float t

add a b adds corresponding dimensions of a and b.

Sourceval sub : float t -> float t -> float t

sub a b subtracts corresponding dimensions of b from a.

Sourceval (+) : float t -> float t -> float t

a + b is add a b.

Sourceval (-) : float t -> float t -> float t

a - b is sub a b.

Sourceval mul_scalar : float t -> float -> float t

mul_scalar size scalar multiplies both width and height by scalar.

Sourceval div_scalar : float t -> float -> float t

div_scalar size scalar divides both width and height by scalar.

Sourceval (*) : float t -> float -> float t

size * scalar is mul_scalar size scalar.

Sourceval (/) : float t -> float -> float t

size / scalar is div_scalar size scalar.

Mapping Functions

Sourceval map : ('a -> 'b) -> 'a t -> 'b t

map f size applies f to both width and height, transforming 'a t into 'b t.

Sourceval map_width : ('a -> 'a) -> 'a t -> 'a t

map_width f size applies f to the width while preserving the height.

Sourceval map_height : ('a -> 'a) -> 'a t -> 'a t

map_height f size applies f to the height while preserving the width.

Sourceval zip_map : 'b t -> ('a -> 'b -> 'c) -> 'a t -> 'c t

zip_map other f size applies f pairwise to corresponding dimensions of size and other.

Sourceval map2 : ('a -> 'b -> 'c) -> 'a t -> 'b t -> 'c t

map2 f s1 s2 is zip_map s2 f s1.

Axis Accessors

Sourceval get : Abstract_axis.t -> 'a t -> 'a

get axis size retrieves the dimension corresponding to axis.

Returns width for Abstract_axis.Inline and height for Abstract_axis.Block.

Sourceval set : Abstract_axis.t -> 'a -> 'a t -> 'a t

set axis value size returns a new size with the dimension corresponding to axis set to value.

Sets width for Abstract_axis.Inline and height for Abstract_axis.Block.

Sourceval get_absolute : Absolute_axis.t -> 'a t -> 'a

get_absolute axis size retrieves the dimension corresponding to axis.

Returns width for Absolute_axis.Horizontal and height for Absolute_axis.Vertical.

Float-Specific Operations

Sourceval max : float t -> float t -> float t

max a b computes the component-wise maximum of a and b.

Sourceval min : float t -> float t -> float t

min a b computes the component-wise minimum of a and b.

Sourceval has_non_zero_area : float t -> bool

has_non_zero_area size returns true if both width and height are strictly greater than 0.0.

Sourceval equal : float t -> float t -> bool

equal a b tests structural equality of a and b using float equality.

Option-Specific Operations

Sourceval unwrap_or : 'a t -> 'a option t -> 'a t

unwrap_or alt size unwraps each dimension of size, using the corresponding dimension from alt when None.

Sourceval choose_first : 'a option t -> 'a option t -> 'a option t

choose_first size alt selects dimensions from size when Some, falling back to alt when None.

Sourceval both_axis_defined : 'a option t -> bool

both_axis_defined size returns true if both width and height are Some.

Sourceval apply_aspect_ratio : float option -> float option t -> float option t

apply_aspect_ratio aspect_ratio size applies aspect_ratio to compute the missing dimension.

If aspect_ratio is Some ratio:

  • When width is Some but height is None, computes height as width / ratio
  • When height is Some but width is None, computes width as height * ratio
  • Otherwise returns size unchanged

If aspect_ratio is None, returns size unchanged.

Comparison and Formatting

Sourceval compare : ('a -> 'a -> int) -> 'a t -> 'a t -> int

compare cmp a b performs lexicographic comparison using cmp, comparing width first, then height.

Sourceval equal_with : ('a -> 'a -> bool) -> 'a t -> 'a t -> bool

equal_with eq a b tests equality using eq for both width and height.

Sourceval to_string : ('a -> string) -> 'a t -> string

to_string f size converts size to a string representation using f for each dimension.

Sourceval pp : (Format.formatter -> 'a -> unit) -> Format.formatter -> 'a t -> unit

pp f fmt size formats size using fmt and f for each dimension.

Sourceval equal_option : ('a -> 'a -> bool) -> 'a option t -> 'a option t -> bool

equal_option eq a b tests equality of optional sizes using eq for the contained values.

Option Operations

These operations implement Taffy's MaybeMath patterns for working with optional values. They follow specific semantics where None represents the absence of a constraint.

Option → Option Operations

Sourceval min_option : float option t -> float option t -> float option t

min_option a b computes the component-wise minimum of optional sizes.

For each dimension:

  • Some l, Some r produces Some (min l r)
  • Some _, None produces the left value
  • None, _ produces None
Sourceval max_option : float option t -> float option t -> float option t

max_option a b computes the component-wise maximum of optional sizes.

For each dimension:

  • Some l, Some r produces Some (max l r)
  • Some _, None produces the left value
  • None, _ produces None
Sourceval add_option : float option t -> float option t -> float option t

add_option a b adds optional sizes component-wise.

For each dimension:

  • Some l, Some r produces Some (l + r)
  • Some _, None produces the left value
  • None, Some _ produces None
Sourceval sub_option : float option t -> float option t -> float option t

sub_option a b subtracts optional sizes component-wise.

For each dimension:

  • Some l, Some r produces Some (l - r)
  • Some _, None produces the left value
  • None, _ produces None
Sourceval clamp_option : float option t -> float option t -> float option t -> float option t

clamp_option min max size clamps each dimension of size between optional bounds.

For each dimension, returns:

  • Some (clamp base min_val max_val) when all three are Some
  • Some (clamp base _ max_val) when only max is Some
  • Some (clamp base min_val _) when only min is Some
  • The original value when both bounds are None
  • None when size is None

Concrete + Option → Option Operations

Sourceval min_with_option : float t -> float option t -> float option t

min_with_option concrete optional computes the minimum of a concrete size with an optional size.

For each dimension, returns Some (min concrete opt) when optional is Some opt, otherwise Some concrete.

Sourceval max_with_option : float t -> float option t -> float option t

max_with_option concrete optional computes the maximum of a concrete size with an optional size.

For each dimension, returns Some (max concrete opt) when optional is Some opt, otherwise Some concrete.

Sourceval add_with_option : float t -> float option t -> float option t

add_with_option concrete optional adds a concrete size to an optional size.

For each dimension, returns Some (concrete + opt) when optional is Some opt, otherwise Some concrete.

Sourceval sub_with_option : float t -> float option t -> float option t

sub_with_option concrete optional subtracts an optional size from a concrete size.

For each dimension, returns Some (concrete - opt) when optional is Some opt, otherwise Some concrete.

Concrete Operations with Optional Parameters

Sourceval clamp : float option t -> float option t -> float t -> float t

clamp min max size clamps size between optional bounds, returning a concrete size.

For each dimension:

  • When both bounds are Some, returns min max_val (max min_val size)
  • When only max is Some, returns min max_val size
  • When only min is Some, returns max min_val size
  • When both are None, returns size unchanged
Sourceval min_or_self : float option t -> float t -> float t

min_or_self optional size computes the minimum with an optional size, falling back to size.

For each dimension, returns min size val_ when optional is Some val_, otherwise size.

Sourceval max_or_self : float option t -> float t -> float t

max_or_self optional size computes the maximum with an optional size, falling back to size.

For each dimension, returns max size val_ when optional is Some val_, otherwise size.

Sourceval add_or_zero : float option t -> float t -> float t

add_or_zero optional size adds an optional size to a concrete size, treating None as zero.

For each dimension, returns size + val_ when optional is Some val_, otherwise size.

Sourceval sub_or_zero : float option t -> float t -> float t

sub_or_zero optional size subtracts an optional size from a concrete size, treating None as zero.

For each dimension, returns size - val_ when optional is Some val_, otherwise size.

Sourceval max_concrete : float t -> float t -> float t

max_concrete a b computes the component-wise maximum using Float.max.

Option + Concrete → Option Operations

Sourceval maybe_add : float t -> float option t -> float option t

maybe_add concrete opt_size adds a concrete size to an optional size.

For each dimension, maps Some v to Some (v + concrete), and None to None.

Sourceval maybe_sub : float t -> float option t -> float option t

maybe_sub concrete opt_size subtracts a concrete size from an optional size.

For each dimension, maps Some v to Some (v - concrete), and None to None.

Sourceval maybe_min : float t -> float option t -> float option t

maybe_min concrete opt_size computes the minimum of an optional size with a concrete size.

For each dimension, maps Some v to Some (min v concrete), and None to None.

Sourceval maybe_max : float t -> float option t -> float option t

maybe_max concrete opt_size computes the maximum of an optional size with a concrete size.

For each dimension, maps Some v to Some (max v concrete), and None to None.