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use anyhow::bail;
use quick_xml::events::{BytesStart, Event};
use std::io::Read;
use crate::{excel::XmlReader, raw::drawing::st_types::STAdjustAngle};
use super::position::XlsxPosition;
/// https://learn.microsoft.com/en-us/dotnet/api/documentformat.openxml.drawing.connectionsite?view=openxml-3.0.1
///
/// This element specifies the existence of a connection site on a custom shape.
///
/// Example
/// ```
/// <a:cxnLst>
/// <a:cxn ang="0">
/// <a:pos x="0" y="679622"/>
/// </a:cxn>
/// <a:cxn ang="0">
/// <a:pos x="1705233" y="679622"/>
/// </a:cxn>
/// </a:cxnLst>
/// ```
// tag: cxn
#[derive(Debug, Clone, PartialEq)]
pub struct XlsxConnectionSite {
// Child Elements
// pos (Shape Position Coordinate)
pub position: Option<XlsxPosition>,
// Attributes
/// Specifies the incoming connector angle.
/// This angle is the angle around the connection site that an incoming connector tries to be routed to.
/// This allows connectors to know where the shape is in relation to the connection site and route connectors so as to avoid any overlap with the shape.
// ang (Connection Site Angle)
pub angle: Option<STAdjustAngle>,
}
impl XlsxConnectionSite {
pub(crate) fn load(reader: &mut XmlReader<impl Read>, e: &BytesStart) -> anyhow::Result<Self> {
let mut site = Self {
position: None,
angle: None,
};
let attributes = e.attributes();
for a in attributes {
match a {
Ok(a) => {
let string_value = String::from_utf8(a.value.to_vec())?;
match a.key.local_name().as_ref() {
b"ang" => {
site.angle = Some(STAdjustAngle::from_string(&string_value));
break;
}
_ => {}
}
}
Err(error) => {
bail!(error.to_string())
}
}
}
let mut buf = Vec::new();
loop {
buf.clear();
match reader.read_event_into(&mut buf) {
Ok(Event::Start(ref e)) if e.local_name().as_ref() == b"pos" => {
site.position = Some(XlsxPosition::load(e)?);
}
Ok(Event::End(ref e)) if e.local_name().as_ref() == b"cxn" => break,
Ok(Event::Eof) => bail!("unexpected end of file."),
Err(e) => bail!(e.to_string()),
_ => (),
}
}
Ok(site)
}
}