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//! Visual theme for book rendering.
/// All colors are 0xAARRGGBB.
#[derive(Debug, Clone)]
pub struct BookTheme {
/// Outer book background (dark border frame).
pub bg: u32,
/// Left page background (light parchment).
pub page_bg: u32,
/// Right page background (slightly warmer parchment).
pub page_bg_right: u32,
/// Default body text.
pub text: u32,
/// Entry/category titles.
pub title: u32,
/// Unselected navigation text.
pub nav: u32,
/// Selected navigation item text.
pub nav_selected: u32,
/// Selected navigation item background.
pub nav_selected_bg: u32,
/// Border/separator line color.
pub border: u32,
/// Book nameplate (title) color.
pub nameplate: u32,
/// Divider line between sections.
pub divider: u32,
}
impl Default for BookTheme {
fn default() -> Self {
Self {
// Patchouli defaults: textColor=000000, headerColor=333333,
// nameplateColor=FFDD98.
bg: 0xFF_2A1A08, // dark brown outer frame
page_bg: 0xFF_F5E6C8, // left page: warm cream parchment
page_bg_right: 0xFF_EECF9A, // right page: slightly golden parchment
text: 0xFF_000000, // body text (Patchouli textColor)
title: 0xFF_333333, // headers (Patchouli headerColor)
nav: 0xFF_5C4020, // nav links (unselected)
nav_selected: 0xFF_C87820, // nav links (selected, amber)
nav_selected_bg: 0x50_C87820, // selected row tint (semi-transparent amber)
border: 0xFF_5C3A10, // spine + divider lines
nameplate: 0xFF_FFDD98, // book title color (Patchouli nameplateColor)
divider: 0xFF_333333, // section headers ("Categories" etc.)
}
}
}
impl BookTheme {
/// Override nameplate color from the book's hex string (e.g. "0066cc").
/// Like Patchouli, this only affects the nameplate text — headers keep
/// their own headerColor.
pub fn with_nameplate(mut self, hex: &str) -> Self {
if let Ok(v) = u32::from_str_radix(hex.trim_start_matches('#'), 16) {
self.nameplate = 0xFF_000000 | v;
}
self
}
}