Struct StateStack 

pub struct StateStack { /* private fields */ }

The q/Q stack.

Unbounded, matching PDFium — a content stream may nest as deeply as it likes, and the memory cost is bounded by the stream’s own length.

Implementations

impl StateStack

pub fn new() -> Self

An empty stack.

pub fn depth(&self) -> usize

How deep the stack is.

pub fn is_empty(&self) -> bool

Whether nothing has been saved.

pub fn push(&mut self, state: &GraphicsState)

q: save a copy of state.

pub fn pop(&mut self, state: &mut GraphicsState) -> bool

Q: restore into state.

Answers whether anything was restored — a question, not a failed mutation. An empty stack is a no-op, which is what keeps an unbalanced stream rendering.

Trait Implementations

impl Clone for StateStack

fn clone(&self) -> StateStack

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StateStack

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

Formats the value using the given formatter.

impl Default for StateStack

fn default() -> StateStack

Returns the “default value” for a type.

impl PartialEq for StateStack

fn eq(&self, other: &StateStack) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for StateStack