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Revert "Refactor statusline elements to build `Spans` (#9122)" (#10642)

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pull/10701/head
Szabin 6 months ago committed by GitHub
parent e16a4f8a2c
commit beb5afcbef
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1 changed files with 242 additions and 170 deletions
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402
helix-term/src/ui/statusline.rs
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@ -4,6 +4,7 @@ use helix_view::document::DEFAULT_LANGUAGE_NAME;
use helix_view::{
document::{Mode, SCRATCH_BUFFER_NAME},
graphics::Rect,
theme::Style,
Document, Editor, View,
};
@ -19,6 +20,7 @@ pub struct RenderContext<'a> {
pub view: &'a View,
pub focused: bool,
pub spinners: &'a ProgressSpinners,
pub parts: RenderBuffer<'a>,
}
impl<'a> RenderContext<'a> {
@ -35,10 +37,18 @@ impl<'a> RenderContext<'a> {
view,
focused,
spinners,
parts: RenderBuffer::default(),
}
}
}
#[derive(Default)]
pub struct RenderBuffer<'a> {
pub left: Spans<'a>,
pub center: Spans<'a>,
pub right: Spans<'a>,
}
pub fn render(context: &mut RenderContext, viewport: Rect, surface: &mut Surface) {
let base_style = if context.focused {
context.editor.theme.get("ui.statusline")
@ -48,87 +58,85 @@ pub fn render(context: &mut RenderContext, viewport: Rect, surface: &mut Surface
surface.set_style(viewport.with_height(1), base_style);
let statusline = render_statusline(context, viewport.width as usize);
let write_left = |context: &mut RenderContext, text, style| {
append(&mut context.parts.left, text, &base_style, style)
};
let write_center = |context: &mut RenderContext, text, style| {
append(&mut context.parts.center, text, &base_style, style)
};
let write_right = |context: &mut RenderContext, text, style| {
append(&mut context.parts.right, text, &base_style, style)
};
// Left side of the status line.
let config = context.editor.config();
let element_ids = &config.statusline.left;
element_ids
.iter()
.map(|element_id| get_render_function(*element_id))
.for_each(|render| render(context, write_left));
surface.set_spans(
viewport.x,
viewport.y,
&statusline,
statusline.width() as u16,
&context.parts.left,
context.parts.left.width() as u16,
);
}
pub fn render_statusline<'a>(context: &mut RenderContext, width: usize) -> Spans<'a> {
let config = context.editor.config();
// Right side of the status line.
let element_ids = &config.statusline.left;
let mut left = element_ids
let element_ids = &config.statusline.right;
element_ids
.iter()
.map(|element_id| get_render_function(*element_id))
.flat_map(|render| render(context).0)
.collect::<Vec<Span>>();
.for_each(|render| render(context, write_right));
surface.set_spans(
viewport.x
+ viewport
.width
.saturating_sub(context.parts.right.width() as u16),
viewport.y,
&context.parts.right,
context.parts.right.width() as u16,
);
// Center of the status line.
let element_ids = &config.statusline.center;
let mut center = element_ids
element_ids
.iter()
.map(|element_id| get_render_function(*element_id))
.flat_map(|render| render(context).0)
.collect::<Vec<Span>>();
.for_each(|render| render(context, write_center));
let element_ids = &config.statusline.right;
let mut right = element_ids
.iter()
.map(|element_id| get_render_function(*element_id))
.flat_map(|render| render(context).0)
.collect::<Vec<Span>>();
let left_area_width: usize = left.iter().map(|s| s.width()).sum();
let center_area_width: usize = center.iter().map(|s| s.width()).sum();
let right_area_width: usize = right.iter().map(|s| s.width()).sum();
let min_spacing_between_areas = 1usize;
let sides_space_required = left_area_width + right_area_width + min_spacing_between_areas;
let total_space_required = sides_space_required + center_area_width + min_spacing_between_areas;
let mut statusline: Vec<Span> = vec![];
if center_area_width > 0 && total_space_required <= width {
// SAFETY: this subtraction cannot underflow because `left_area_width + center_area_width + right_area_width`
// is smaller than `total_space_required`, which is smaller than `width` in this branch.
let total_spacers = width - (left_area_width + center_area_width + right_area_width);
// This is how much padding space it would take on either side to align the center area to the middle.
let center_margin = (width - center_area_width) / 2;
let left_spacers = if left_area_width < center_margin && right_area_width < center_margin {
// Align the center area to the middle if there is enough space on both sides.
center_margin - left_area_width
} else {
// Otherwise split the available space evenly and use it as margin.
// The center element won't be aligned to the middle but it will be evenly
// spaced between the left and right areas.
total_spacers / 2
};
let right_spacers = total_spacers - left_spacers;
statusline.append(&mut left);
statusline.push(" ".repeat(left_spacers).into());
statusline.append(&mut center);
statusline.push(" ".repeat(right_spacers).into());
statusline.append(&mut right);
} else if right_area_width > 0 && sides_space_required <= width {
let side_areas_width = left_area_width + right_area_width;
statusline.append(&mut left);
statusline.push(" ".repeat(width - side_areas_width).into());
statusline.append(&mut right);
} else if left_area_width <= width {
statusline.append(&mut left);
}
// Width of the empty space between the left and center area and between the center and right area.
let spacing = 1u16;
let edge_width = context.parts.left.width().max(context.parts.right.width()) as u16;
let center_max_width = viewport.width.saturating_sub(2 * edge_width + 2 * spacing);
let center_width = center_max_width.min(context.parts.center.width() as u16);
surface.set_spans(
viewport.x + viewport.width / 2 - center_width / 2,
viewport.y,
&context.parts.center,
center_width,
);
}
statusline.into()
fn append(buffer: &mut Spans, text: String, base_style: &Style, style: Option<Style>) {
buffer.0.push(Span::styled(
text,
style.map_or(*base_style, |s| (*base_style).patch(s)),
));
}
fn get_render_function<'a>(
element_id: StatusLineElementID,
) -> impl Fn(&RenderContext) -> Spans<'a> {
fn get_render_function<F>(element_id: StatusLineElementID) -> impl Fn(&mut RenderContext, F)
where
F: Fn(&mut RenderContext, String, Option<Style>) + Copy,
{
match element_id {
helix_view::editor::StatusLineElement::Mode => render_mode,
helix_view::editor::StatusLineElement::Spinner => render_lsp_spinner,
@ -158,40 +166,48 @@ fn get_render_function<'a>(
}
}
fn render_mode<'a>(context: &RenderContext) -> Spans<'a> {
fn render_mode<F>(context: &mut RenderContext, write: F)
where
F: Fn(&mut RenderContext, String, Option<Style>) + Copy,
{
let visible = context.focused;
let config = context.editor.config();
let modenames = &config.statusline.mode;
let modename = if visible {
write(
context,
format!(
" {} ",
if visible {
match context.editor.mode() {
Mode::Insert => modenames.insert.clone(),
Mode::Select => modenames.select.clone(),
Mode::Normal => modenames.normal.clone(),
Mode::Insert => &modenames.insert,
Mode::Select => &modenames.select,
Mode::Normal => &modenames.normal,
}
} else {
// If not focused, explicitly leave an empty space.
" ".into()
};
let modename = format!(" {} ", modename);
// If not focused, explicitly leave an empty space instead of returning None.
" "
}
),
if visible && config.color_modes {
Span::styled(
modename,
match context.editor.mode() {
Mode::Insert => context.editor.theme.get("ui.statusline.insert"),
Mode::Select => context.editor.theme.get("ui.statusline.select"),
Mode::Normal => context.editor.theme.get("ui.statusline.normal"),
},
)
.into()
} else {
Span::raw(modename).into()
Mode::Insert => Some(context.editor.theme.get("ui.statusline.insert")),
Mode::Select => Some(context.editor.theme.get("ui.statusline.select")),
Mode::Normal => Some(context.editor.theme.get("ui.statusline.normal")),
}
} else {
None
},
);
}
// TODO think about handling multiple language servers
fn render_lsp_spinner<'a>(context: &RenderContext) -> Spans<'a> {
fn render_lsp_spinner<F>(context: &mut RenderContext, write: F)
where
F: Fn(&mut RenderContext, String, Option<Style>) + Copy,
{
let language_server = context.doc.language_servers().next();
Span::raw(
write(
context,
language_server
.and_then(|srv| {
context
@ -202,11 +218,14 @@ fn render_lsp_spinner<'a>(context: &RenderContext) -> Spans<'a> {
// Even if there's no spinner; reserve its space to avoid elements frequently shifting.
.unwrap_or(" ")
.to_string(),
)
.into()
None,
);
}
fn render_diagnostics<'a>(context: &RenderContext) -> Spans<'a> {
fn render_diagnostics<F>(context: &mut RenderContext, write: F)
where
F: Fn(&mut RenderContext, String, Option<Style>) + Copy,
{
let (warnings, errors) = context
.doc
.diagnostics()
@ -221,28 +240,29 @@ fn render_diagnostics<'a>(context: &RenderContext) -> Spans<'a> {
counts
});
let mut output = Spans::default();
if warnings > 0 {
output.0.push(Span::styled(
write(
context,
"●".to_string(),
context.editor.theme.get("warning"),
));
output.0.push(Span::raw(format!(" {} ", warnings)));
Some(context.editor.theme.get("warning")),
);
write(context, format!(" {} ", warnings), None);
}
if errors > 0 {
output.0.push(Span::styled(
write(
context,
"●".to_string(),
context.editor.theme.get("error"),
));
output.0.push(Span::raw(format!(" {} ", errors)));
Some(context.editor.theme.get("error")),
);
write(context, format!(" {} ", errors), None);
}
output
}
fn render_workspace_diagnostics<'a>(context: &RenderContext) -> Spans<'a> {
fn render_workspace_diagnostics<F>(context: &mut RenderContext, write: F)
where
F: Fn(&mut RenderContext, String, Option<Style>) + Copy,
{
let (warnings, errors) =
context
.editor
@ -258,49 +278,51 @@ fn render_workspace_diagnostics<'a>(context: &RenderContext) -> Spans<'a> {
counts
});
let mut output = Spans::default();
if warnings > 0 || errors > 0 {
output.0.push(Span::raw(" W "));
write(context, " W ".into(), None);
}
if warnings > 0 {
output.0.push(Span::styled(
write(
context,
"●".to_string(),
context.editor.theme.get("warning"),
));
output.0.push(Span::raw(format!(" {} ", warnings)));
Some(context.editor.theme.get("warning")),
);
write(context, format!(" {} ", warnings), None);
}
if errors > 0 {
output.0.push(Span::styled(
write(
context,
"●".to_string(),
context.editor.theme.get("error"),
));
output.0.push(Span::raw(format!(" {} ", errors)));
Some(context.editor.theme.get("error")),
);
write(context, format!(" {} ", errors), None);
}
output
}
fn render_selections<'a>(context: &RenderContext) -> Spans<'a> {
fn render_selections<F>(context: &mut RenderContext, write: F)
where
F: Fn(&mut RenderContext, String, Option<Style>) + Copy,
{
let count = context.doc.selection(context.view.id).len();
Span::raw(format!(
" {} sel{} ",
count,
if count == 1 { "" } else { "s" }
))
.into()
write(
context,
format!(" {} sel{} ", count, if count == 1 { "" } else { "s" }),
None,
);
}
fn render_primary_selection_length<'a>(context: &RenderContext) -> Spans<'a> {
fn render_primary_selection_length<F>(context: &mut RenderContext, write: F)
where
F: Fn(&mut RenderContext, String, Option<Style>) + Copy,
{
let tot_sel = context.doc.selection(context.view.id).primary().len();
Span::raw(format!(
" {} char{} ",
tot_sel,
if tot_sel == 1 { "" } else { "s" }
))
.into()
write(
context,
format!(" {} char{} ", tot_sel, if tot_sel == 1 { "" } else { "s" }),
None,
);
}
fn get_position(context: &RenderContext) -> Position {
@ -314,33 +336,55 @@ fn get_position(context: &RenderContext) -> Position {
)
}
fn render_position<'a>(context: &RenderContext) -> Spans<'a> {
fn render_position<F>(context: &mut RenderContext, write: F)
where
F: Fn(&mut RenderContext, String, Option<Style>) + Copy,
{
let position = get_position(context);
Span::raw(format!(" {}:{} ", position.row + 1, position.col + 1)).into()
write(
context,
format!(" {}:{} ", position.row + 1, position.col + 1),
None,
);
}
fn render_total_line_numbers<'a>(context: &RenderContext) -> Spans<'a> {
fn render_total_line_numbers<F>(context: &mut RenderContext, write: F)
where
F: Fn(&mut RenderContext, String, Option<Style>) + Copy,
{
let total_line_numbers = context.doc.text().len_lines();
Span::raw(format!(" {} ", total_line_numbers)).into()
write(context, format!(" {} ", total_line_numbers), None);
}
fn render_position_percentage<'a>(context: &RenderContext) -> Spans<'a> {
fn render_position_percentage<F>(context: &mut RenderContext, write: F)
where
F: Fn(&mut RenderContext, String, Option<Style>) + Copy,
{
let position = get_position(context);
let maxrows = context.doc.text().len_lines();
Span::raw(format!("{}%", (position.row + 1) * 100 / maxrows)).into()
write(
context,
format!("{}%", (position.row + 1) * 100 / maxrows),
None,
);
}
fn render_file_encoding<'a>(context: &RenderContext) -> Spans<'a> {
fn render_file_encoding<F>(context: &mut RenderContext, write: F)
where
F: Fn(&mut RenderContext, String, Option<Style>) + Copy,
{
let enc = context.doc.encoding();
if enc != encoding::UTF_8 {
Span::raw(format!(" {} ", enc.name())).into()
} else {
Spans::default()
write(context, format!(" {} ", enc.name()), None);
}
}
fn render_file_line_ending<'a>(context: &RenderContext) -> Spans<'a> {
fn render_file_line_ending<F>(context: &mut RenderContext, write: F)
where
F: Fn(&mut RenderContext, String, Option<Style>) + Copy,
{
use helix_core::LineEnding::*;
let line_ending = match context.doc.line_ending {
Crlf => "CRLF",
@ -359,16 +403,22 @@ fn render_file_line_ending<'a>(context: &RenderContext) -> Spans<'a> {
PS => "PS", // U+2029 -- ParagraphSeparator
};
Span::raw(format!(" {} ", line_ending)).into()
write(context, format!(" {} ", line_ending), None);
}
fn render_file_type<'a>(context: &RenderContext) -> Spans<'a> {
fn render_file_type<F>(context: &mut RenderContext, write: F)
where
F: Fn(&mut RenderContext, String, Option<Style>) + Copy,
{
let file_type = context.doc.language_name().unwrap_or(DEFAULT_LANGUAGE_NAME);
Span::raw(format!(" {} ", file_type)).into()
write(context, format!(" {} ", file_type), None);
}
fn render_file_name<'a>(context: &RenderContext) -> Spans<'a> {
fn render_file_name<F>(context: &mut RenderContext, write: F)
where
F: Fn(&mut RenderContext, String, Option<Style>) + Copy,
{
let title = {
let rel_path = context.doc.relative_path();
let path = rel_path
@ -378,10 +428,13 @@ fn render_file_name<'a>(context: &RenderContext) -> Spans<'a> {
format!(" {} ", path)
};
Span::raw(title).into()
write(context, title, None);
}
fn render_file_absolute_path<'a>(context: &RenderContext) -> Spans<'a> {
fn render_file_absolute_path<F>(context: &mut RenderContext, write: F)
where
F: Fn(&mut RenderContext, String, Option<Style>) + Copy,
{
let title = {
let path = context.doc.path();
let path = path
@ -391,10 +444,13 @@ fn render_file_absolute_path<'a>(context: &RenderContext) -> Spans<'a> {
format!(" {} ", path)
};
Span::raw(title).into()
write(context, title, None);
}
fn render_file_modification_indicator<'a>(context: &RenderContext) -> Spans<'a> {
fn render_file_modification_indicator<F>(context: &mut RenderContext, write: F)
where
F: Fn(&mut RenderContext, String, Option<Style>) + Copy,
{
let title = (if context.doc.is_modified() {
"[+]"
} else {
@ -402,20 +458,26 @@ fn render_file_modification_indicator<'a>(context: &RenderContext) -> Spans<'a>
})
.to_string();
Span::raw(title).into()
write(context, title, None);
}
fn render_read_only_indicator<'a>(context: &RenderContext) -> Spans<'a> {
fn render_read_only_indicator<F>(context: &mut RenderContext, write: F)
where
F: Fn(&mut RenderContext, String, Option<Style>) + Copy,
{
let title = if context.doc.readonly {
" [readonly] "
} else {
""
}
.to_string();
Span::raw(title).into()
write(context, title, None);
}
fn render_file_base_name<'a>(context: &RenderContext) -> Spans<'a> {
fn render_file_base_name<F>(context: &mut RenderContext, write: F)
where
F: Fn(&mut RenderContext, String, Option<Style>) + Copy,
{
let title = {
let rel_path = context.doc.relative_path();
let path = rel_path
@ -425,37 +487,47 @@ fn render_file_base_name<'a>(context: &RenderContext) -> Spans<'a> {
format!(" {} ", path)
};
Span::raw(title).into()
write(context, title, None);
}
fn render_separator<'a>(context: &RenderContext) -> Spans<'a> {
fn render_separator<F>(context: &mut RenderContext, write: F)
where
F: Fn(&mut RenderContext, String, Option<Style>) + Copy,
{
let sep = &context.editor.config().statusline.separator;
Span::styled(
write(
context,
sep.to_string(),
context.editor.theme.get("ui.statusline.separator"),
)
.into()
Some(context.editor.theme.get("ui.statusline.separator")),
);
}
fn render_spacer<'a>(_context: &RenderContext) -> Spans<'a> {
Span::raw(" ").into()
fn render_spacer<F>(context: &mut RenderContext, write: F)
where
F: Fn(&mut RenderContext, String, Option<Style>) + Copy,
{
write(context, String::from(" "), None);
}
fn render_version_control<'a>(context: &RenderContext) -> Spans<'a> {
fn render_version_control<F>(context: &mut RenderContext, write: F)
where
F: Fn(&mut RenderContext, String, Option<Style>) + Copy,
{
let head = context
.doc
.version_control_head()
.unwrap_or_default()
.to_string();
Span::raw(head).into()
write(context, head, None);
}
fn render_register<'a>(context: &RenderContext) -> Spans<'a> {
fn render_register<F>(context: &mut RenderContext, write: F)
where
F: Fn(&mut RenderContext, String, Option<Style>) + Copy,
{
if let Some(reg) = context.editor.selected_register {
Span::raw(format!(" reg={} ", reg)).into()
} else {
Spans::default()
write(context, format!(" reg={} ", reg), None)
}
}

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