Struct Context 

pub struct Context { /* private fields */ }

What a widget is told when it measures and renders: the width to fill, the tab stop spacing, and the box characters.

A context holds no colour or terminal fact. Styles are resolved before layout, and escape sequences are written after it.

It is Clone but not Copy, so a later release can add a field without breaking a caller that copies it. A widget takes &Context.

The at_* and using_* methods return a changed clone, so a container derives the context of a child from its own: context.at_width(column).

Implementations

impl Context

pub fn new(width: u16) -> Self

A context width cells wide, with tab stops every TAB_WIDTH cells and Unicode box characters.

pub fn unbounded() -> Self

A context with no width limit, so a widget takes its natural width.

width reports u16::MAX, so layout arithmetic needs no special case, and is_unbounded tells a caller that the width is no limit and not a real one. Every method that returns a changed clone keeps the flag, including at_width.

pub fn at_width(&self, width: u16) -> Self

This context at another width.

pub fn at_tab_width(&self, tab_width: NonZeroU16) -> Self

This context with tab stops every tab_width cells.

pub fn using_box_chars(&self, box_chars: BoxChars) -> Self

This context with box_chars for borders.

pub fn width(&self) -> u16

The width in cells that rendered lines should fit.

pub fn is_unbounded(&self) -> bool

Whether this context was made by unbounded, so width is no limit.

pub fn tab_width(&self) -> NonZeroU16

The spacing of tab stops, in cells.

pub fn box_chars(&self) -> BoxChars

The characters to draw borders and rules with.

Trait Implementations

impl Clone for Context

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Context

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

Formats the value using the given formatter.

impl Eq for Context

impl Hash for Context

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Context

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Context