Struct DefaultAppearance 

pub struct DefaultAppearance {
    pub font: Font,
    pub font_size: f64,
    pub color: Color,
}

Default appearance for a form field’s value rendering (ISO 32000-1 §12.7.3.3).

The /DA entry on a form field dictionary tells viewers — and, critically, Document::fill_field — which font, size, and colour to use when generating the field’s /AP/N stream. Expressed in PDF as a content-stream fragment (/FontName size Tf <color op>); this struct models it with typed fields and serialises to that exact syntax.

Selecting a custom Type0/CID font here is the only path today that lets fill_field emit a correct appearance for non-WinAnsi values (CJK, Arabic, etc.) — see issue #212.

Fields

font: Font

Font to use in the appearance stream. Must be registered on the Document via add_font_from_bytes if a custom font is selected.

font_size: f64

Font size in user-space units.

color: Color

Fill colour for the drawn text.

Implementations

impl DefaultAppearance

pub fn new(font: Font, font_size: f64, color: Color) -> Self

Build a default appearance from its typed components.

pub fn to_da_string(&self) -> String

Render as the PDF /DA string per ISO 32000-1 §12.7.3.3.

Examples:

• Font::Helvetica, 12.0, Color::gray(0.0) → /Helvetica 12 Tf 0 g
• Font::Custom("CJK"), 14.0, Color::rgb(0.0, 0.0, 0.0) → /CJK 14 Tf 0 0 0 rg

Trait Implementations

impl Clone for DefaultAppearance

fn clone(&self) -> DefaultAppearance

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DefaultAppearance

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

Formats the value using the given formatter.