docx-reader 0.1.1

use std::io::Read;
use std::str::FromStr;
use xml::attribute::OwnedAttribute;
use xml::reader::{EventReader, XmlEvent};

use super::*;

impl ElementReader for NumberingProperty {
	fn read<R: Read>(
		r: &mut EventReader<R>,
		_attrs: &[OwnedAttribute],
	) -> Result<Self, ReaderError> {
		let mut id: Option<usize> = None;
		let mut level: Option<usize> = None;
		loop {
			let e = r.next();
			match e {
				Ok(XmlEvent::StartElement {
					attributes, name, ..
				}) => {
					let e = XMLElement::from_str(&name.local_name).unwrap();
					match e {
						XMLElement::IndentLevel => {
							level = Some(usize::from_str(&attributes[0].value)?);
							continue;
						}
						XMLElement::NumberingId => {
							id = Some(usize::from_str(&attributes[0].value)?);
							continue;
						}
						_ => {}
					}
				}
				Ok(XmlEvent::EndElement { name, .. }) => {
					let e = XMLElement::from_str(&name.local_name).unwrap();
					if e == XMLElement::NumberingProperty {
						if level.is_none() {
							if let Some(id) = id {
								return Ok(NumberingProperty::new().id(NumberingId::new(id)));
							}
						}
						if let Some(id) = id {
							let np = NumberingProperty::new()
								.add_num(NumberingId::new(id), IndentLevel::new(level.unwrap()));
							return Ok(np);
						}
						return Ok(NumberingProperty::new());
					}
				}
				Err(_) => return Err(ReaderError::XMLReadError),
				_ => {}
			}
		}
	}
}