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improve log drawing performance

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This commit is contained in:
Stephan Dilly 2020-05-23 11:19:09 +02:00
parent 38e00386d3
commit 88850a6026
1 changed files with 21 additions and 21 deletions
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42
src/tabs/revlog/mod.rs
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@ -23,7 +23,6 @@ use tui::{
};
use utils::{ItemBatch, LogEntry};
static ELEMENTS_PER_LINE: usize = 10;
static SLICE_SIZE: usize = 1200;
///
pub struct Revlog {
@ -169,7 +168,8 @@ impl Revlog {
tags: Option<String>,
theme: &Theme,
) {
let count_before = txt.len();
const ELEMENTS_PER_LINE: usize = 10;
txt.reserve(ELEMENTS_PER_LINE);
let splitter_txt = Cow::from(" ");
@ -205,16 +205,21 @@ impl Revlog {
theme.text(true, selected),
));
txt.push(Text::Raw(Cow::from("\n")));
assert_eq!(txt.len() - count_before, ELEMENTS_PER_LINE);
}
fn get_text(&self) -> Vec<Text> {
fn get_text(&self, height: usize) -> Vec<Text> {
let selection = self.relative_selection();
let mut txt = Vec::new();
for (idx, e) in self.items.items.iter().enumerate() {
for (idx, e) in self
.items
.items
.iter()
.skip(self.scroll_top)
.take(height)
.enumerate()
{
let tag = if let Some(tags) = self.tags.get(&e.hash) {
Some(tags.join(" "))
} else {
@ -222,7 +227,7 @@ impl Revlog {
};
Self::add_entry(
e,
idx == selection,
idx + self.scroll_top == selection,
&mut txt,
tag,
&self.theme,
@ -261,20 +266,15 @@ impl DrawableComponent for Revlog {
);
f.render_widget(
Paragraph::new(
self.get_text()
.iter()
.skip(self.scroll_top * ELEMENTS_PER_LINE)
.take(height_in_lines * ELEMENTS_PER_LINE),
)
.block(
Block::default()
.borders(Borders::ALL)
.title(title.as_str())
.border_style(self.theme.block(true))
.title_style(self.theme.title(true)),
)
.alignment(Alignment::Left),
Paragraph::new(self.get_text(height_in_lines).iter())
.block(
Block::default()
.borders(Borders::ALL)
.title(title.as_str())
.border_style(self.theme.block(true))
.title_style(self.theme.title(true)),
)
.alignment(Alignment::Left),
area,
);
}