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use anyhow::bail;
use quick_xml::events::BytesStart;
use crate::helper::string_to_int;
/// lum (Luminance Effect)
///
/// This element specifies a luminance effect.
/// Brightness linearly shifts all colors closer to white or black.
/// Contrast scales all colors to be either closer or further apart.
///
/// https://learn.microsoft.com/en-us/dotnet/api/documentformat.openxml.drawing.luminanceeffect?view=openxml-3.0.1
#[derive(Debug, Clone, PartialEq)]
pub struct XlsxLuminance {
// attributes:
/// Specifies the percent to change the brightness.
pub bright: Option<i64>,
/// Specifies the percent to change the contrast
pub contrast: Option<i64>,
}
impl XlsxLuminance {
pub(crate) fn load(e: &BytesStart) -> anyhow::Result<Self> {
let attributes = e.attributes();
let mut lum = Self {
bright: None,
contrast: None,
};
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"bright" => {
lum.bright = string_to_int(&string_value);
}
b"contrast" => {
lum.contrast = string_to_int(&string_value);
}
_ => {}
}
}
Err(error) => {
bail!(error.to_string())
}
}
}
Ok(lum)
}
}