Struct LayerSet 

pub struct LayerSet { /* private fields */ }

Per-render override of OCG visibility.

An OCG with no entry here falls back to its display-list-baked default_visible. Entries are explicit bools so a consumer can override a layer in either direction.

Implementations

impl LayerSet

pub fn new() -> LayerSet

Construct an empty set — every OCG falls back to its default_visible.

pub fn set(&mut self, ocg_id: u32, visible: bool)

Override the visibility of an OCG.

pub fn get(&self, ocg_id: u32) -> Option<bool>

Get the explicit override for an OCG, if any. None means the renderer should fall back to default_visible.

pub fn clear(&mut self, ocg_id: u32)

Drop an explicit override, restoring fallback behaviour.

pub fn len(&self) -> usize

Number of explicit overrides.

pub fn is_empty(&self) -> bool

True when no explicit overrides exist.

pub fn evaluate(&self, vis: &OcgVisibility) -> bool

Evaluate an OcgVisibility predicate.

Each variant’s default_visible is the renderer’s fallback for the whole group when this LayerSet has no opinion on any of its leaves. Specifically:

• Single → consult the LayerSet for ocg_id; fall back to default_visible.
• Membership / Expression → if none of the relevant leaves are overridden by this LayerSet, return default_visible directly. This is the “consumer has no opinion at all” path and preserves byte-identity for OCMD defaults baked at parse time.
• With at least one leaf overridden, evaluate the policy or expression: overridden leaves use their override value, missing leaves fall back to the variant’s default_visible.

pub fn enforce_rb_group(&mut self, group: &[u32], newly_on: u32)

Apply a radio-button-group constraint: when one layer in the group is turned ON, all the others get explicitly turned OFF. newly_on is left ON.

Layers in group other than newly_on are explicitly forced OFF (they get an entry in this set, not just a missing entry).

Trait Implementations

impl Clone for LayerSet

fn clone(&self) -> LayerSet

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LayerSet

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

Formats the value using the given formatter.

impl Default for LayerSet

fn default() -> LayerSet

Returns the “default value” for a type.