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use std::fmt::Write;
use crate::{editor::Config, graphics::Style, Document, Theme, View};
pub type GutterFn<'doc> = Box<dyn Fn(usize, bool, &mut String) -> Option<Style> + 'doc>;
pub type Gutter =
for<'doc> fn(&'doc Document, &View, &Theme, &Config, bool, usize) -> GutterFn<'doc>;
pub fn diagnostic<'doc>(
doc: &'doc Document,
_view: &View,
theme: &Theme,
_config: &Config,
_is_focused: bool,
_width: usize,
) -> GutterFn<'doc> {
let warning = theme.get("warning");
let error = theme.get("error");
let info = theme.get("info");
let hint = theme.get("hint");
let diagnostics = doc.diagnostics();
Box::new(move |line: usize, _selected: bool, out: &mut String| {
use helix_core::diagnostic::Severity;
if let Some(diagnostic) = diagnostics.iter().find(|d| d.line == line) {
write!(out, "●").unwrap();
return Some(match diagnostic.severity {
Some(Severity::Error) => error,
Some(Severity::Warning) | None => warning,
Some(Severity::Info) => info,
Some(Severity::Hint) => hint,
});
}
None
})
}
pub fn line_number<'doc>(
doc: &'doc Document,
view: &View,
theme: &Theme,
config: &Config,
is_focused: bool,
width: usize,
) -> GutterFn<'doc> {
let text = doc.text().slice(..);
let last_line = view.last_line(doc);
// Whether to draw the line number for the last line of the
// document or not. We only draw it if it's not an empty line.
let draw_last = text.line_to_byte(last_line) < text.len_bytes();
let linenr = theme.get("ui.linenr");
let linenr_select: Style = theme.try_get("ui.linenr.selected").unwrap_or(linenr);
let current_line = doc
.text()
.char_to_line(doc.selection(view.id).primary().cursor(text));
let config = config.line_number;
Box::new(move |line: usize, selected: bool, out: &mut String| {
if line == last_line && !draw_last {
write!(out, "{:>1$}", '~', width).unwrap();
Some(linenr)
} else {
use crate::editor::LineNumber;
let line = match config {
LineNumber::Absolute => line + 1,
LineNumber::Relative => {
if current_line == line {
line + 1
} else {
abs_diff(current_line, line)
}
}
};
let style = if selected && is_focused {
linenr_select
} else {
linenr
};
write!(out, "{:>1$}", line, width).unwrap();
Some(style)
}
})
}
#[inline(always)]
const fn abs_diff(a: usize, b: usize) -> usize {
if a > b {
a - b
} else {
b - a
}
}
|
