pdf_parser 0.1.0

PDF parser
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use crate::{error::PdfResult, objects::Dictionary, pdf_enum, stream::Stream, Resolve};

use self::{form::FormXObject, image::ImageXObject, postscript::PostScriptXObject};

mod form;
mod image;
mod postscript;
mod reference;

/// An external object (commonly called an XObject) is a graphics object
/// whose contents are defined by a self-contained stream, separate from the
/// content stream in which it is used
#[derive(Debug)]
pub enum XObject {
    Image(ImageXObject),
    Form(FormXObject),
    PostScript(PostScriptXObject),
}

pdf_enum!(
    enum XObjectSubtype {
        PostScript = "PS",
        Image = "Image",
        Form = "Form",
    }
);

impl XObject {
    const TYPE: &'static str = "XObject";

    pub fn from_stream(mut stream: Stream, resolver: &mut dyn Resolve) -> PdfResult<Self> {
        let dict = &mut stream.dict.other;

        dict.expect_type(Self::TYPE, resolver, false)?;

        let subtype = XObjectSubtype::from_str(&dict.expect_name("Subtype", resolver)?)?;

        Ok(match subtype {
            XObjectSubtype::PostScript => {
                XObject::PostScript(PostScriptXObject::from_stream(stream, resolver)?)
            }
            XObjectSubtype::Image => XObject::Image(ImageXObject::from_stream(stream, resolver)?),
            XObjectSubtype::Form => XObject::Form(FormXObject::from_stream(stream, resolver)?),
        })
    }
}

#[derive(Debug)]
pub struct OpenPrepressInterface;

impl OpenPrepressInterface {
    pub fn from_dict(_dict: Dictionary, _resolver: &mut dyn Resolve) -> PdfResult<Self> {
        todo!()
    }
}