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use crate::term::BufWrite as _;
/// Represents a foreground or background color for cells.
#[derive(Eq, PartialEq, Debug, Copy, Clone)]
pub enum Color {
/// The default terminal color.
Default,
/// An indexed terminal color.
Idx(u8),
/// An RGB terminal color. The parameters are (red, green, blue).
Rgb(u8, u8, u8),
}
impl Default for Color {
fn default() -> Self {
Self::Default
}
}
const TEXT_MODE_BOLD: u8 = 0b0000_0001;
const TEXT_MODE_ITALIC: u8 = 0b0000_0010;
const TEXT_MODE_UNDERLINE: u8 = 0b0000_0100;
const TEXT_MODE_INVERSE: u8 = 0b0000_1000;
#[derive(Default, Clone, Copy, PartialEq, Eq, Debug)]
pub struct Attrs {
pub fgcolor: Color,
pub bgcolor: Color,
pub mode: u8,
}
impl Attrs {
pub fn bold(&self) -> bool {
self.mode & TEXT_MODE_BOLD != 0
}
pub fn set_bold(&mut self, bold: bool) {
if bold {
self.mode |= TEXT_MODE_BOLD;
} else {
self.mode &= !TEXT_MODE_BOLD;
}
}
pub fn italic(&self) -> bool {
self.mode & TEXT_MODE_ITALIC != 0
}
pub fn set_italic(&mut self, italic: bool) {
if italic {
self.mode |= TEXT_MODE_ITALIC;
} else {
self.mode &= !TEXT_MODE_ITALIC;
}
}
pub fn underline(&self) -> bool {
self.mode & TEXT_MODE_UNDERLINE != 0
}
pub fn set_underline(&mut self, underline: bool) {
if underline {
self.mode |= TEXT_MODE_UNDERLINE;
} else {
self.mode &= !TEXT_MODE_UNDERLINE;
}
}
pub fn inverse(&self) -> bool {
self.mode & TEXT_MODE_INVERSE != 0
}
pub fn set_inverse(&mut self, inverse: bool) {
if inverse {
self.mode |= TEXT_MODE_INVERSE;
} else {
self.mode &= !TEXT_MODE_INVERSE;
}
}
pub fn write_escape_code_diff(
&self,
contents: &mut Vec<u8>,
other: &Self,
) {
if self != other && self == &Self::default() {
crate::term::ClearAttrs::default().write_buf(contents);
return;
}
let attrs = crate::term::Attrs::default();
let attrs = if self.fgcolor == other.fgcolor {
attrs
} else {
attrs.fgcolor(self.fgcolor)
};
let attrs = if self.bgcolor == other.bgcolor {
attrs
} else {
attrs.bgcolor(self.bgcolor)
};
let attrs = if self.bold() == other.bold() {
attrs
} else {
attrs.bold(self.bold())
};
let attrs = if self.italic() == other.italic() {
attrs
} else {
attrs.italic(self.italic())
};
let attrs = if self.underline() == other.underline() {
attrs
} else {
attrs.underline(self.underline())
};
let attrs = if self.inverse() == other.inverse() {
attrs
} else {
attrs.inverse(self.inverse())
};
attrs.write_buf(contents);
}
}
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