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M2.1: document the .xls style helpers

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Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
This commit is contained in:
Daniel Lubryka
2026-10-31 19:14:33 +01:00
co-authored by Claude Sonnet 5.5
parent 879ea7385f
commit d25445f4e3
1 changed files with 4 additions and 0 deletions
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crates/xlsx/src/xls/styles.rs
+4
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@@ -225,6 +225,7 @@ fn color(icv: u16, table: &[u32; 64]) -> Color {
}
}
/// A border line style from its BIFF8 code (dgLeft and the like); unknown codes are no border.
fn border_style(dg: u32) -> BorderStyle {
match dg {
1 => BorderStyle::Thin,
@@ -244,6 +245,7 @@ fn border_style(dg: u32) -> BorderStyle {
}
}
/// A fill pattern from its BIFF8 code (fls); unknown codes are no pattern.
fn pattern(fls: u16) -> PatternType {
match fls {
0x01 => PatternType::Solid,
@@ -268,6 +270,7 @@ fn pattern(fls: u16) -> PatternType {
}
}
/// One border side: its style and colour; a side without a style has no colour.
fn line(dg: u32, icv: u32, table: &[u32; 64]) -> BorderLine {
let style = border_style(dg);
if style == BorderStyle::None {
@@ -288,6 +291,7 @@ fn xf_font(ifnt: u16, fonts: &[Font]) -> Font {
fonts.get(i).or_else(|| fonts.first()).cloned().unwrap_or_default()
}
/// The number format an XF names: a custom format, else a built-in one, else General.
fn num_fmt(ifmt: u16, formats: &HashMap<u16, String>) -> NumFmt {
let code = formats.get(&ifmt).map(String::as_str).or_else(|| builtin_format(u32::from(ifmt))).unwrap_or("General");
if code.eq_ignore_ascii_case("General") { NumFmt::default() } else { NumFmt::new(code) }