Struct cursive::view::SizeCache

pub struct SizeCache {
    pub value: usize,
    pub constrained: bool,
}

Cache around a one-dimensional layout result.

This is not a View, but something to help you if you create your own Views.

Fields

value: usize

Cached value

constrained: bool

true if the last size was constrained.

If unconstrained, any request larger than this value would return the same size.

Implementations

impl SizeCache

pub fn new(value: usize, constrained: bool) -> SizeCache

Creates a new sized cache

pub fn accept(self, request: usize) -> bool

Returns true if self is still valid for the given request.

pub fn value(self) -> usize

Returns the value in the cache.

pub fn build(size: XY<usize>, req: XY<usize>) -> XY<SizeCache>

Creates a new bi-dimensional cache.

It will stay valid for the same request, and compatible ones.

A compatible request is one where, for each axis, either:

• the request is equal to the cached size, or
• the request is larger than the cached size and the cache is unconstrained

Notes:

• size must fit inside req.
• for each dimension, constrained = (size == req)

Trait Implementations

impl Clone for SizeCache

fn clone(&self) -> SizeCache

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for SizeCache

impl Debug for SizeCache

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

Formats the value using the given formatter.

impl PartialEq<SizeCache> for SizeCache

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl StructuralPartialEq for SizeCache