Struct OcContext 

pub struct OcContext { /* private fields */ }

The visibility context: the catalog’s optional-content configuration plus the memoized answers.

Group answers are memoized; membership answers are not, matching PDFium, because a membership can depend on several groups and its evaluation is cheap.

Implementations

impl OcContext

pub fn new(properties: Option<Dict>, usage: UsageType) -> Self

A context reading usage from the catalog’s /OCProperties.

pub fn permissive() -> Self

A context that makes everything visible, for a document with no optional content.

pub fn content_visible<R: Resolve>( &mut self, dict: Option<&Dict>, r: &R, diags: &mut Diagnostics, ) -> bool

Whether a dictionary reached from content is visible.

A null dictionary is visible here — the opposite of Self::group_visible, and the asymmetry is deliberate: content with no optional-content dictionary is unconditional content.

pub fn group_visible<R: Resolve>(&mut self, dict: Option<&Dict>, r: &R) -> bool

Whether an optional-content group is visible.

A null dictionary is invisible here. The answer is memoized per group; membership answers deliberately are not.

pub fn memoized(&self) -> usize

How many group answers are memoized.

Trait Implementations

impl Debug for OcContext

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

Formats the value using the given formatter.