Enum AnnotationSubtype 

#[non_exhaustive]
pub enum AnnotationSubtype {
    Link {
        target: Option<AnnotationTarget>,
        highlight: Option<LinkHighlight>,
    },
    Text {
        open: bool,
        icon: TextAnnotationIcon,
    },
    FreeText {
        default_appearance: Option<String>,
        quadding: Option<u32>,
    },
    Widget(WidgetAnnotation),
}

Per-subtype annotation payload. Each variant carries the keys specific to that subtype; shared keys (rect, color, border, title, contents, page) live on the parent AnnotationRecord.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Link

/Subtype /Link — clickable region. Target is an action, explicit page+view, or a named destination; exactly one of the three is expected.

Fields

target: Option<AnnotationTarget>

highlight: Option<LinkHighlight>

/H highlight mode: /N (none), /I (invert), /O (outline), /P (push). Optional.

Text

/Subtype /Text — sticky-note annotation.

Fields

open: bool

/Open (boolean, default false).

icon: TextAnnotationIcon

/Name icon — /Comment, /Note (default), /Key, /Help, /NewParagraph, /Paragraph, /Insert.

FreeText

/Subtype /FreeText — free-floating text annotation rendered directly on the page.

Fields

default_appearance: Option<String>

/DA default appearance string. Optional but most viewers require it to render anything; if absent, stet emits a sane default (0 0 0 rg /Helv 10 Tf).

quadding: Option<u32>

/Q quadding: 0=left, 1=center, 2=right. Optional.

Widget(WidgetAnnotation)

/Subtype /Widget — interactive form field. Author-only: stet doesn’t render or run forms interactively, but it emits the PDF AcroForm structure so downstream viewers (Acrobat, Okular, pdf.js) can. The widget annotation and its leaf field dict are merged into a single PDF object — common when a field has exactly one widget — and the field-tree builder in crates/stet-pdf/src/form_fields.rs handles the multi-widget (radio group) and dotted-name parent cases.

Trait Implementations

impl Clone for AnnotationSubtype

fn clone(&self) -> AnnotationSubtype

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AnnotationSubtype

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

Formats the value using the given formatter.