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fix #291: hide scroll info when content fit

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- Do not show the pager if the content could fit the window.
- Show the pager otherwise.
This commit is contained in:
Jinzhou Zhang 2020-04-08 15:49:39 +08:00
parent 12ad99ec3a
commit 9befd0645d
1 changed files with 20 additions and 12 deletions
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32
src/previewer.rs
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@ -190,6 +190,12 @@ impl Previewer {
}
fn act_scroll_down(&mut self, diff: i32) {
let content_len = self.content_lines.lock().len();
if content_len <= self.height.load(Ordering::SeqCst) {
// don't scroll if content could be filled
return;
}
if diff > 0 {
self.vscroll_offset += diff as usize;
} else {
@ -261,18 +267,20 @@ impl Draw for Previewer {
.unwrap();
printer.print_lines(canvas, &content);
// print the vscroll info
let status = format!("{}/{}", self.vscroll_offset + 1, content.len());
let col = max(status.len() + 1, self.width.load(Ordering::Relaxed)) - status.len() - 1;
canvas.print_with_attr(
0,
col,
&status,
Attr {
effect: Effect::REVERSE,
..Attr::default()
},
)?;
// print the vscroll info (only if content could not fit in one page)
if content.len() > self.height.load(Ordering::SeqCst) {
let status = format!("{}/{}", self.vscroll_offset + 1, content.len());
let col = max(status.len() + 1, self.width.load(Ordering::SeqCst)) - status.len() - 1;
canvas.print_with_attr(
0,
col,
&status,
Attr {
effect: Effect::REVERSE,
..Attr::default()
},
)?;
}
Ok(())
}