Conrad Irwin
33f68882c1
Release Notes: - vim: Fixed ctrl-d/ctrl-u getting to top/bottom of buffer (#13250)
33 lines
954 B
Rust
33 lines
954 B
Rust
use serde::Deserialize;
|
|
use ui::{px, Pixels};
|
|
|
|
#[derive(Debug, Clone, PartialEq, Deserialize)]
|
|
pub enum ScrollAmount {
|
|
// Scroll N lines (positive is towards the end of the document)
|
|
Line(f32),
|
|
// Scroll N pages (positive is towards the end of the document)
|
|
Page(f32),
|
|
}
|
|
|
|
impl ScrollAmount {
|
|
pub fn lines(&self, mut visible_line_count: f32) -> f32 {
|
|
match self {
|
|
Self::Line(count) => *count,
|
|
Self::Page(count) => {
|
|
// for full pages subtract one to leave an anchor line
|
|
if count.abs() == 1.0 {
|
|
visible_line_count -= 1.0
|
|
}
|
|
(visible_line_count * count).trunc()
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn pixels(&self, line_height: Pixels, height: Pixels) -> Pixels {
|
|
match self {
|
|
ScrollAmount::Line(x) => px(line_height.0 * x),
|
|
ScrollAmount::Page(x) => px(height.0 * x),
|
|
}
|
|
}
|
|
}
|