umya-spreadsheet 2.3.3

umya-spreadsheet is a library written in pure Rust to read and write xlsx file.
Documentation 
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// a:camera
use super::super::EnumValue;
use super::PresetCameraValues;
use super::Rotation;
use crate::reader::driver::*;
use crate::writer::driver::*;
use quick_xml::events::{BytesStart, Event};
use quick_xml::Reader;
use quick_xml::Writer;
use std::io::Cursor;

#[derive(Clone, Default, Debug)]
pub struct Camera {
    preset: EnumValue<PresetCameraValues>,
    rotation: Option<Box<Rotation>>,
}

impl Camera {
    #[inline]
    pub fn get_preset(&self) -> &PresetCameraValues {
        self.preset.get_value()
    }

    #[inline]
    pub fn set_preset(&mut self, value: PresetCameraValues) -> &mut Self {
        self.preset.set_value(value);
        self
    }

    #[inline]
    pub fn get_rotation(&self) -> Option<&Rotation> {
        self.rotation.as_deref()
    }

    #[inline]
    pub fn get_rotation_mut(&mut self) -> Option<&mut Rotation> {
        self.rotation.as_deref_mut()
    }

    #[inline]
    pub fn set_rotation(&mut self, value: Rotation) -> &mut Self {
        self.rotation = Some(Box::new(value));
        self
    }

    pub(crate) fn set_attributes<R: std::io::BufRead>(
        &mut self,
        reader: &mut Reader<R>,
        e: &BytesStart,
        empty_flag: bool,
    ) {
        set_string_from_xml!(self, e, preset, "prst");

        if empty_flag {
            return;
        }

        xml_read_loop!(
            reader,
            Event::Empty(ref e) => {
                if e.name().into_inner() == b"a:rot" {
                    let mut obj = Rotation::default();
                    obj.set_attributes(reader, e);
                    self.rotation = Some(Box::new(obj));
                }
            },
            Event::End(ref e) => {
                if e.name().into_inner() == b"a:camera" {
                    return
                }
            },
            Event::Eof => panic!("Error: Could not find {} end element", "a:camera")
        );
    }

    pub(crate) fn write_to(&self, writer: &mut Writer<Cursor<Vec<u8>>>) {
        let with_inner = self.rotation.is_some();
        // a:camera
        write_start_tag(
            writer,
            "a:camera",
            vec![("prst", self.preset.get_value_string())],
            !with_inner,
        );

        if with_inner {
            // a:rot
            if let Some(v) = &self.rotation {
                v.write_to(writer);
            }
            write_end_tag(writer, "a:camera");
        }
    }
}