Struct Contours 

pub struct Contours { /* private fields */ }

Every contour a book’s sheet asked for, traced once and kept by asset.

This is the trace stage. Nothing is traced because it is an image. It is traced because a rule that matched it resolved to shape-outside: auto, and that is not reachable from where probing happens: probing takes a book and a loader, and neither has seen the style tree.

The stage sits above line breaking, because a contour that moved is a measure that moved. It keeps what an earlier run traced, so a sheet edit that leaves the contours where they were decodes nothing.

Implementations

impl Contours

pub fn none() -> Contours

Nothing traced: what a book whose sheet names no contour carries.

pub fn update( &mut self, book: &Book, styles: &StyleTree, assets: &Assets, ) -> u32

Traces every asset the cascade asks for and this table does not already answer for, and reports how many images it decoded.

A book whose sheet names no contour decodes nothing, and so does one whose contours are all traced already.

pub fn get(&self, asset: u32) -> Option<&Contour>

The contour one asset traced to, and None where it traced to nothing or was never asked for.

pub fn traces(&self, asset: u32) -> bool

Whether this table holds a trace of one asset, whatever the trace found.

pub fn warnings(&self) -> &[Warning]

What tracing had to complain about.

Trait Implementations

impl Debug for Contours

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

Formats the value using the given formatter.

impl Default for Contours

fn default() -> Contours

Returns the “default value” for a type.