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use std::fmt;
use crossfont::Size as FontSize;
use serde::de::{self, Visitor};
use serde::{Deserialize, Deserializer};
use alacritty_config_derive::{ConfigDeserialize, SerdeReplace};
use crate::config::ui_config::Delta;
/// Font config.
///
/// Defaults are provided at the level of this struct per platform, but not per
/// field in this struct. It might be nice in the future to have defaults for
/// each value independently. Alternatively, maybe erroring when the user
/// doesn't provide complete config is Ok.
#[derive(ConfigDeserialize, Debug, Clone, PartialEq, Eq)]
pub struct Font {
/// Extra spacing per character.
pub offset: Delta<i8>,
/// Glyph offset within character cell.
pub glyph_offset: Delta<i8>,
#[config(removed = "set the AppleFontSmoothing user default instead")]
pub use_thin_strokes: bool,
/// Normal font face.
normal: FontDescription,
/// Bold font face.
bold: SecondaryFontDescription,
/// Italic font face.
italic: SecondaryFontDescription,
/// Bold italic font face.
bold_italic: SecondaryFontDescription,
/// Font size in points.
size: Size,
/// Whether to use the built-in font for box drawing characters.
pub builtin_box_drawing: bool,
}
impl Font {
/// Get a font clone with a size modification.
pub fn with_size(self, size: FontSize) -> Font {
Font { size: Size(size), ..self }
}
#[inline]
pub fn size(&self) -> FontSize {
self.size.0
}
/// Get normal font description.
pub fn normal(&self) -> &FontDescription {
&self.normal
}
/// Get bold font description.
pub fn bold(&self) -> FontDescription {
self.bold.desc(&self.normal)
}
/// Get italic font description.
pub fn italic(&self) -> FontDescription {
self.italic.desc(&self.normal)
}
/// Get bold italic font description.
pub fn bold_italic(&self) -> FontDescription {
self.bold_italic.desc(&self.normal)
}
}
impl Default for Font {
fn default() -> Font {
Self {
builtin_box_drawing: true,
glyph_offset: Default::default(),
use_thin_strokes: Default::default(),
bold_italic: Default::default(),
italic: Default::default(),
offset: Default::default(),
normal: Default::default(),
bold: Default::default(),
size: Default::default(),
}
}
}
/// Description of the normal font.
#[derive(ConfigDeserialize, Debug, Clone, PartialEq, Eq)]
pub struct FontDescription {
pub family: String,
pub style: Option<String>,
}
impl Default for FontDescription {
fn default() -> FontDescription {
FontDescription {
#[cfg(not(any(target_os = "macos", windows)))]
family: "monospace".into(),
#[cfg(target_os = "macos")]
family: "Menlo".into(),
#[cfg(windows)]
family: "Consolas".into(),
style: None,
}
}
}
/// Description of the italic and bold font.
#[derive(ConfigDeserialize, Debug, Default, Clone, PartialEq, Eq)]
pub struct SecondaryFontDescription {
family: Option<String>,
style: Option<String>,
}
impl SecondaryFontDescription {
pub fn desc(&self, fallback: &FontDescription) -> FontDescription {
FontDescription {
family: self.family.clone().unwrap_or_else(|| fallback.family.clone()),
style: self.style.clone(),
}
}
}
#[derive(SerdeReplace, Debug, Clone, PartialEq, Eq)]
struct Size(FontSize);
impl Default for Size {
fn default() -> Self {
Self(FontSize::new(11.))
}
}
impl<'de> Deserialize<'de> for Size {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
struct NumVisitor;
impl<'v> Visitor<'v> for NumVisitor {
type Value = Size;
fn expecting(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_str("f64 or i64")
}
fn visit_f64<E: de::Error>(self, value: f64) -> Result<Self::Value, E> {
Ok(Size(FontSize::new(value as f32)))
}
fn visit_i64<E: de::Error>(self, value: i64) -> Result<Self::Value, E> {
Ok(Size(FontSize::new(value as f32)))
}
}
deserializer.deserialize_any(NumVisitor)
}
}
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