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|
use std::collections::HashMap;
#[derive(Hash, PartialEq, Eq)]
pub enum HlGroup {
Pmenu,
PmenuSel,
Tabline,
TablineSel,
TablineFill,
Cmdline,
CmdlineBorder,
Wildmenu,
WildmenuSel,
MsgSeparator,
}
#[derive(Default)]
pub struct HlDefs {
hl_defs: HashMap<u64, Highlight>,
hl_groups: HashMap<HlGroup, u64>,
pub default_fg: Color,
pub default_bg: Color,
pub default_sp: Color,
}
impl HlDefs {
pub fn get_mut(&mut self, id: &u64) -> Option<&mut Highlight> {
self.hl_defs.get_mut(id)
}
pub fn get(&self, id: &u64) -> Option<&Highlight> {
self.hl_defs.get(id)
}
pub fn insert(&mut self, id: u64, hl: Highlight) -> Option<Highlight> {
self.hl_defs.insert(id, hl)
}
pub fn set_hl_group(&mut self, group: HlGroup, id: u64) -> Option<u64> {
self.hl_groups.insert(group, id)
}
pub fn get_hl_group(&self, group: &HlGroup) -> Option<&Highlight> {
if let Some(id) = self.hl_groups.get(group) {
return self.hl_defs.get(id);
}
None
}
}
#[derive(Debug, Clone, Copy, Default, PartialEq)]
pub struct Highlight {
pub foreground: Option<Color>,
pub background: Option<Color>,
pub special: Option<Color>,
pub reverse: bool,
pub italic: bool,
pub bold: bool,
pub underline: bool,
pub undercurl: bool,
/// The blend value in range of 0..1.
pub blend: f64,
}
impl Highlight {
pub fn pango_markup(
&self,
text: &str,
default_fg: &Color,
default_bg: &Color,
default_sp: &Color,
) -> String {
let fg = self.foreground.as_ref().unwrap_or(default_fg);
let bg = self.background.as_ref().unwrap_or(default_bg);
let sp = self.special.as_ref().unwrap_or(default_sp);
let weight = if self.bold { "bold" } else { "normal" };
let underline = if self.undercurl {
"error"
} else if self.underline {
"underline"
} else {
"none"
};
let fontstyle = if self.italic { "italic" } else { "normal" };
format!(
"<span
foreground=\"#{fg}\"
background=\"#{bg}\"
underline_color=\"#{sp}\"
weight=\"{weight}\"
font_style=\"{fontstyle}\"
underline=\"{underline}\">{text}</span>",
fg = fg.to_hex(),
bg = bg.to_hex(),
sp = sp.to_hex(),
weight = weight,
fontstyle = fontstyle,
underline = underline,
text = glib::markup_escape_text(text)
)
}
/// Apply the highlight's blend value to color. Returns the color
/// in `rgba()` format.
pub fn apply_blend(&self, color: &Color) -> String {
color.to_rgba(self.blend)
}
}
#[derive(Debug, Clone, Copy, Default, PartialEq)]
pub struct Color {
pub r: f64,
pub g: f64,
pub b: f64,
}
impl Color {
#[allow(unused)]
pub fn from_hex_string(mut hex: String) -> Result<Color, String> {
let l = hex.chars().count();
if l == 7 {
hex = hex.chars().skip(1).collect();
} else if l != 6 {
return Err(String::from("hex string has invalid length"));
}
let res = u64::from_str_radix(hex.as_str(), 16);
if let Ok(res) = res {
Ok(Color::from_u64(res))
} else {
Err(format!(
"Failed to parse hex string '{}': {:?}",
hex,
res.err()
))
}
}
pub fn from_u64(v: u64) -> Color {
Color {
r: ((v >> 16) & 255) as f64 / 255f64,
g: ((v >> 8) & 255) as f64 / 255f64,
b: (v & 255) as f64 / 255f64,
}
}
pub fn to_hex(&self) -> String {
format!(
"{:02x}{:02x}{:02x}",
(self.r * 255.0) as u8,
(self.g * 255.0) as u8,
(self.b * 255.0) as u8
)
}
/// Apply the blend value to color. Returns the color in `rgba()` format.
/// Note that the blend value is inverted.
pub fn to_rgba(&self, blend: f64) -> String {
format!(
"rgba({}, {}, {}, {})",
(self.r * 255.0) as u8,
(self.g * 255.0) as u8,
(self.b * 255.0) as u8,
1.0 - blend
)
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_color_to_rgba() {
let c = Color {
r: 1.0,
g: 0.0,
b: 1.0,
};
assert_eq!(c.to_rgba(0.4), "rgba(255, 0, 255, 0.6)");
}
}
|
