pdf-annot 1.0.0-beta.9

PDF annotation engine — parsing and typed access to all annotation types per ISO 32000-2 §12.5.
Documentation 
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//! Error types for annotation building.

/// Errors that can occur when building annotations.
#[derive(Debug, thiserror::Error)]
pub enum AnnotBuildError {
    /// Page number is out of range.
    #[error("page {0} out of range (document has {1} pages)")]
    PageOutOfRange(u32, usize),

    /// Failed to encode appearance stream content.
    #[error("failed to encode appearance stream: {0}")]
    AppearanceEncode(String),

    /// The annotation rectangle is invalid (zero area).
    #[error("invalid annotation rectangle: width or height is zero")]
    InvalidRect,

    /// Failed to write the annotation to the page dictionary (e.g. ObjStm page
    /// that lopdf cannot mutate in-place).  Fixes #470.
    #[error("failed to write annotation to page dictionary")]
    PageMutationFailed,
}