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perf: only render inline blame for visible lines when all-lines is set

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Previously, we rendereded the inline blame for lines in 3X the range of
the viewport

This is not necessary because when we scroll down, the rendering will
occur before we see the new content
This commit is contained in:
Nik Revenco 2025-03-30 11:42:43 +01:00
parent 95344a9585
commit 1a0dad36b7
2 changed files with 16 additions and 16 deletions
helix-term/src/ui
editor.rs
helix-view/src
view.rs

20
helix-term/src/ui/editor.rs
View file

@ -254,13 +254,14 @@ impl EditorView {
theme: &Theme,
) {
const INLINE_BLAME_SCOPE: &str = "ui.virtual.inline-blame";
let text = doc.text();
match inline_blame.behaviour {
InlineBlameBehaviour::Hidden => (),
InlineBlameBehaviour::CursorLine => {
let cursor_line_idx = doc.cursor_line(view.id);
// do not render inline blame for empty lines to reduce visual noise
if doc.text().line(cursor_line_idx) != doc.line_ending.as_str() {
if text.line(cursor_line_idx) != doc.line_ending.as_str() {
if let Ok(line_blame) =
doc.line_blame(cursor_line_idx as u32, &inline_blame.format)
{
@ -275,22 +276,9 @@ impl EditorView {
}
}
InlineBlameBehaviour::AllLines => {
let text = doc.text();
let text_line_count = text.len_lines();
let view_height = view.inner_height();
let first_visible_line =
text.char_to_line(doc.view_offset(view.id).anchor.min(text.len_chars()));
let first_line = first_visible_line.saturating_sub(view_height);
let last_line = first_visible_line
.saturating_add(view_height.saturating_mul(2))
.min(text_line_count);
let mut blame_lines = vec![None; text.len_lines()];
let mut blame_lines = vec![None; text_line_count];
// Compute ~3 times the current view height of inline blame, that way some scrolling
// will not show half the view with inline blame and half without while still being faster
// than rendering inline blame for the full file.
let blame_for_all_lines = (first_line..last_line).filter_map(|line_idx| {
let blame_for_all_lines = view.line_range(doc).filter_map(|line_idx| {
// do not render inline blame for empty lines to reduce visual noise
if text.line(line_idx) != doc.line_ending.as_str() {
doc.line_blame(line_idx as u32, &inline_blame.format)

12
helix-view/src/view.rs
View file

@ -190,6 +190,18 @@ impl View {
self.docs_access_history.push(id);
}
/// The range of lines in the document that the view sees
pub fn line_range(&self, doc: &Document) -> std::ops::Range<usize> {
let text = doc.text();
let text_line_count = text.len_lines();
let first_line = text.char_to_line(doc.view_offset(self.id).anchor.min(text.len_chars()));
let last_line = first_line
.saturating_add(self.inner_height())
.min(text_line_count);
first_line..last_line
}
pub fn inner_area(&self, doc: &Document) -> Rect {
self.area.clip_left(self.gutter_offset(doc)).clip_bottom(1) // -1 for statusline
}