umya-spreadsheet 3.0.0

umya-spreadsheet is a library written in pure Rust to read and write xlsx file.
Documentation 
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use std::io;

use quick_xml::{
    Writer,
    events::{
        BytesDecl,
        Event,
    },
};

use super::{
    XlsxError,
    driver::write_new_line,
};
use crate::{
    helper::const_str::PKG_THEME,
    structs::{
        WriterManager,
        drawing::Theme,
    },
};

pub(crate) fn write<W: io::Seek + io::Write>(
    theme: &Theme,
    writer_mng: &mut WriterManager<W>,
) -> Result<(), XlsxError> {
    let mut writer = Writer::new(io::Cursor::new(Vec::new()));
    // XML header
    writer
        .write_event(Event::Decl(BytesDecl::new(
            "1.0",
            Some("UTF-8"),
            Some("yes"),
        )))
        .unwrap();
    write_new_line(&mut writer);

    // a:theme
    theme.write_to(&mut writer);

    writer_mng.add_writer(PKG_THEME, writer)
}