Struct EncodingPlanner 

pub(crate) struct EncodingPlanner {
    used: HashMap<Base14Font, BTreeSet<char>>,
}

Two-phase encoding planner: caller streams every (face, ch) in through Self::observe, then calls Self::finalize to get one DocEncoding per Latin Core 14 face that participated.

Fields

used: HashMap<Base14Font, BTreeSet<char>>

Observed chars per face. BTreeSet for deterministic order during finalize, which keeps /Differences arrays byte-stable between runs. (Base14Font doesn’t derive Ord, so the outer container is a HashMap: finalize sorts what matters.)

Implementations

impl EncodingPlanner

pub(crate) fn new() -> Self

pub(crate) fn observe(&mut self, face: Base14Font, ch: char)

Record that face will need to render ch. Idempotent. Symbol and ZapfDingbats are silently ignored; those faces don’t participate in /Differences planning (their encodings are different category entirely; see crate-level pdf-base14-metrics docs).

pub(crate) fn observe_runs(&mut self, runs: &[TextRun])

Convenience: feed every char of every text run. Embedded-font runs are skipped; they take the Type 0 CID path and don’t participate in /Differences planning.

pub(crate) fn finalize( self, diagnostics: &mut Vec<Diagnostic>, ) -> HashMap<Font, DocEncoding>

Compute the per-face encoding plan. Any face never observed is absent from the returned map; callers should fall back to the predefined WinAnsiEncoding shortcut for those.

Pushes a MOS0032 diagnostic when a face’s extended-glyph budget overflows the 256-slot single-byte ceiling.

Trait Implementations

impl Debug for EncodingPlanner

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

Formats the value using the given formatter.

impl Default for EncodingPlanner

fn default() -> EncodingPlanner

Returns the “default value” for a type.