docx_reader/reader/
font_group.rs

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

use super::*;

fn read_typeface(attributes: &[OwnedAttribute]) -> Option<String> {
	for a in attributes {
		let local_name = &a.name.local_name;
		if let "typeface" = local_name.as_str() {
			return Some(a.value.to_string());
		}
	}
	None
}

fn read_script_and_typeface(attributes: &[OwnedAttribute]) -> Option<(String, String)> {
	let mut script = None;
	let mut typeface = None;
	for a in attributes {
		let local_name = &a.name.local_name;
		if let "script" = local_name.as_str() {
			script = Some(a.value.to_string());
		}
		if let "typeface" = local_name.as_str() {
			typeface = Some(a.value.to_string());
		}
	}
	if let (Some(script), Some(typeface)) = (script, typeface) {
		return Some((script, typeface));
	}
	None
}

impl ElementReader for FontGroup {
	fn read<R: Read>(
		r: &mut EventReader<R>,
		_attrs: &[OwnedAttribute],
	) -> Result<Self, ReaderError> {
		let mut f = FontGroup::default();
		loop {
			let e = r.next();
			match e {
				Ok(XmlEvent::StartElement {
					attributes, name, ..
				}) => {
					let e = AXMLElement::from_str(&name.local_name).unwrap();
					match e {
						AXMLElement::Latin => {
							if let Some(t) = read_typeface(&attributes) {
								f.latin = t;
							}
						}
						AXMLElement::Ea => {
							if let Some(t) = read_typeface(&attributes) {
								f.ea = t;
							}
						}
						AXMLElement::Cs => {
							if let Some(t) = read_typeface(&attributes) {
								f.cs = t;
							}
						}
						AXMLElement::Font => {
							if let Some((script, typeface)) = read_script_and_typeface(&attributes)
							{
								f.fonts.push(FontSchemeFont { script, typeface })
							}
						}
						_ => {}
					}
				}
				Ok(XmlEvent::EndElement { name, .. }) => {
					let e = AXMLElement::from_str(&name.local_name).unwrap();
					match e {
						AXMLElement::MajorFont | AXMLElement::MinorFont => {
							return Ok(f);
						}
						_ => {}
					}
				}
				Err(_) => return Err(ReaderError::XMLReadError),
				_ => {}
			}
		}
	}
}