Struct FieldAppearanceResult 

pub struct FieldAppearanceResult {
    pub stream: AppearanceStream,
    pub used_chars_by_font: HashMap<String, HashSet<char>>,
}

Outcome of an appearance-stream build — carries the stream plus the per-font character obligations the generator recorded. Callers (typically Document::fill_field) merge used_chars_by_font into Document::used_characters_by_font so the writer’s font subsetter covers every codepoint referenced from any /AP stream (preserves the #204 invariant).

Named struct instead of a tuple so adding further outputs (e.g. computed bbox overrides, resource hints) doesn’t become a breaking API change. The map is empty for built-in fonts that don’t need subsetting.

Fields

stream: AppearanceStream

The rendered appearance stream ready to attach to a widget.

used_chars_by_font: HashMap<String, HashSet<char>>

Characters consumed from each custom Type0 font, keyed by font name. Empty when every emission went through the built-in path.

Trait Implementations

impl Clone for FieldAppearanceResult

fn clone(&self) -> FieldAppearanceResult

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FieldAppearanceResult

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

Formats the value using the given formatter.