use crate::Vim;use editor::{ display_map::{DisplayRow, ToDisplayPoint}, scroll::ScrollAmount, DisplayPoint, Editor, EditorSettings,};use gpui::{actions, ViewContext};use language::Bias;use settings::Settings; actions!( vim, [LineUp, LineDown, ScrollUp, ScrollDown, PageUp, PageDown]); pub fn register(editor: &mut Editor, cx: &mut ViewContext<Vim>) { Vim::action(editor, cx, |vim, _: &LineDown, cx| { vim.scroll(false, cx, |c| ScrollAmount::Line(c.unwrap_or(1.))) }); Vim::action(editor, cx, |vim, _: &LineUp, cx| { vim.scroll(false, cx, |c| ScrollAmount::Line(-c.unwrap_or(1.))) }); Vim::action(editor, cx, |vim, _: &PageDown, cx| { vim.scroll(false, cx, |c| ScrollAmount::Page(c.unwrap_or(1.))) }); Vim::action(editor, cx, |vim, _: &PageUp, cx| { vim.scroll(false, cx, |c| ScrollAmount::Page(-c.unwrap_or(1.))) }); Vim::action(editor, cx, |vim, _: &ScrollDown, cx| { vim.scroll(true, cx, |c| { if let Some(c) = c { ScrollAmount::Line(c) } else { ScrollAmount::Page(0.5) } }) }); Vim::action(editor, cx, |vim, _: &ScrollUp, cx| { vim.scroll(true, cx, |c| { if let Some(c) = c { ScrollAmount::Line(-c) } else { ScrollAmount::Page(-0.5) } }) });} impl Vim { fn scroll( &mut self, move_cursor: bool, cx: &mut ViewContext<Self>, by: fn(c: Option<f32>) -> ScrollAmount, ) { let amount = by(self.take_count(cx).map(|c| c as f32)); self.update_editor(cx, |_, editor, cx| { scroll_editor(editor, move_cursor, &amount, cx) }); }} fn scroll_editor( editor: &mut Editor, preserve_cursor_position: bool, amount: &ScrollAmount, cx: &mut ViewContext<Editor>,) { let should_move_cursor = editor.newest_selection_on_screen(cx).is_eq(); let old_top_anchor = editor.scroll_manager.anchor().anchor; if editor.scroll_hover(amount, cx) { return; } editor.scroll_screen(amount, cx); if !should_move_cursor { return; } let visible_line_count = if let Some(visible_line_count) = editor.visible_line_count() { visible_line_count } else { return; }; let top_anchor = editor.scroll_manager.anchor().anchor; let vertical_scroll_margin = EditorSettings::get_global(cx).vertical_scroll_margin; editor.change_selections(None, cx, |s| { s.move_with(|map, selection| { let mut head = selection.head(); let top = top_anchor.to_display_point(map); let starting_column = head.column(); let vertical_scroll_margin = (vertical_scroll_margin as u32).min(visible_line_count as u32 / 2); if preserve_cursor_position { let old_top = old_top_anchor.to_display_point(map); let new_row = if old_top.row() == top.row() { DisplayRow( head.row() .0 .saturating_add_signed(amount.lines(visible_line_count) as i32), ) } else { DisplayRow(top.row().0 + selection.head().row().0 - old_top.row().0) }; head = map.clip_point(DisplayPoint::new(new_row, head.column()), Bias::Left) } let min_row = if top.row().0 == 0 { DisplayRow(0) } else { DisplayRow(top.row().0 + vertical_scroll_margin) }; let max_row = DisplayRow(map.max_point().row().0.max(top.row().0.saturating_add( (visible_line_count as u32).saturating_sub(1 + vertical_scroll_margin), ))); let new_row = if head.row() < min_row { min_row } else if head.row() > max_row { max_row } else { head.row() }; let new_head = map.clip_point(DisplayPoint::new(new_row, starting_column), Bias::Left); if selection.is_empty() { selection.collapse_to(new_head, selection.goal) } else { selection.set_head(new_head, selection.goal) }; }) });} #[cfg(test)]mod test { use crate::{ state::Mode, test::{NeovimBackedTestContext, VimTestContext}, }; use editor::{EditorSettings, ScrollBeyondLastLine}; use gpui::{point, px, size, Context}; use indoc::indoc; use language::Point; use settings::SettingsStore; pub fn sample_text(rows: usize, cols: usize, start_char: char) -> String { let mut text = String::new(); for row in 0..rows { let c: char = (start_char as u32 + row as u32) as u8 as char; let mut line = c.to_string().repeat(cols); if row < rows - 1 { line.push('\n'); } text += &line; } text } #[gpui::test] async fn test_scroll(cx: &mut gpui::TestAppContext) { let mut cx = VimTestContext::new(cx, true).await; let (line_height, visible_line_count) = cx.editor(|editor, cx| { ( editor .style() .unwrap() .text .line_height_in_pixels(cx.rem_size()), editor.visible_line_count().unwrap(), ) }); let window = cx.window; let margin = cx .update_window(window, |_, cx| { cx.viewport_size().height - line_height * visible_line_count }) .unwrap(); cx.simulate_window_resize( cx.window, size(px(1000.), margin + 8. * line_height - px(1.0)), ); cx.set_state( indoc!( "ˇone two three four five six seven eight nine ten eleven twelve " ), Mode::Normal, ); cx.update_editor(|editor, cx| { assert_eq!(editor.snapshot(cx).scroll_position(), point(0., 0.)) }); cx.simulate_keystrokes("ctrl-e"); cx.update_editor(|editor, cx| { assert_eq!(editor.snapshot(cx).scroll_position(), point(0., 1.)) }); cx.simulate_keystrokes("2 ctrl-e"); cx.update_editor(|editor, cx| { assert_eq!(editor.snapshot(cx).scroll_position(), point(0., 3.)) }); cx.simulate_keystrokes("ctrl-y"); cx.update_editor(|editor, cx| { assert_eq!(editor.snapshot(cx).scroll_position(), point(0., 2.)) }); // does not select in normal mode cx.simulate_keystrokes("g g"); cx.update_editor(|editor, cx| { assert_eq!(editor.snapshot(cx).scroll_position(), point(0., 0.)) }); cx.simulate_keystrokes("ctrl-d"); cx.update_editor(|editor, cx| { assert_eq!(editor.snapshot(cx).scroll_position(), point(0., 3.0)); assert_eq!( editor.selections.newest(cx).range(), Point::new(6, 0)..Point::new(6, 0) ) }); // does select in visual mode cx.simulate_keystrokes("g g"); cx.update_editor(|editor, cx| { assert_eq!(editor.snapshot(cx).scroll_position(), point(0., 0.)) }); cx.simulate_keystrokes("v ctrl-d"); cx.update_editor(|editor, cx| { assert_eq!(editor.snapshot(cx).scroll_position(), point(0., 3.0)); assert_eq!( editor.selections.newest(cx).range(), Point::new(0, 0)..Point::new(6, 1) ) }); } #[gpui::test] async fn test_ctrl_d_u(cx: &mut gpui::TestAppContext) { let mut cx = NeovimBackedTestContext::new(cx).await; cx.set_scroll_height(10).await; let content = "ˇ".to_owned() + &sample_text(26, 2, 'a'); cx.set_shared_state(&content).await; // skip over the scrolloff at the top // test ctrl-d cx.simulate_shared_keystrokes("4 j ctrl-d").await; cx.shared_state().await.assert_matches(); cx.simulate_shared_keystrokes("ctrl-d").await; cx.shared_state().await.assert_matches(); cx.simulate_shared_keystrokes("g g ctrl-d").await; cx.shared_state().await.assert_matches(); // test ctrl-u cx.simulate_shared_keystrokes("ctrl-u").await; cx.shared_state().await.assert_matches(); cx.simulate_shared_keystrokes("ctrl-d ctrl-d 4 j ctrl-u ctrl-u") .await; cx.shared_state().await.assert_matches(); // test returning to top cx.simulate_shared_keystrokes("g g ctrl-d ctrl-u ctrl-u") .await; cx.shared_state().await.assert_matches(); } #[gpui::test] async fn test_scroll_beyond_last_line(cx: &mut gpui::TestAppContext) { let mut cx = NeovimBackedTestContext::new(cx).await; cx.set_scroll_height(10).await; cx.neovim.set_option(&format!("scrolloff={}", 0)).await; let content = "ˇ".to_owned() + &sample_text(26, 2, 'a'); cx.set_shared_state(&content).await; cx.update_global(|store: &mut SettingsStore, cx| { store.update_user_settings::<EditorSettings>(cx, |s| { s.scroll_beyond_last_line = Some(ScrollBeyondLastLine::Off) }); }); // ctrl-d can reach the end and the cursor stays in the first column cx.simulate_shared_keystrokes("shift-g k").await; cx.shared_state().await.assert_matches(); cx.simulate_shared_keystrokes("ctrl-d").await; cx.shared_state().await.assert_matches(); // ctrl-u from the last line cx.simulate_shared_keystrokes("shift-g").await; cx.shared_state().await.assert_matches(); cx.simulate_shared_keystrokes("ctrl-u").await; cx.shared_state().await.assert_matches(); }}
use crate::Vim;
use editor::{
display_map::{DisplayRow, ToDisplayPoint},
scroll::ScrollAmount,
DisplayPoint, Editor, EditorSettings,
};
use gpui::{actions, ViewContext};
use language::Bias;
use settings::Settings;
actions!(
vim,
[LineUp, LineDown, ScrollUp, ScrollDown, PageUp, PageDown]
);
pub fn register(editor: &mut Editor, cx: &mut ViewContext<Vim>) {
Vim::action(editor, cx, |vim, _: &LineDown, cx| {
vim.scroll(false, cx, |c| ScrollAmount::Line(c.unwrap_or(1.)))
});
Vim::action(editor, cx, |vim, _: &LineUp, cx| {
vim.scroll(false, cx, |c| ScrollAmount::Line(-c.unwrap_or(1.)))
});
Vim::action(editor, cx, |vim, _: &PageDown, cx| {
vim.scroll(false, cx, |c| ScrollAmount::Page(c.unwrap_or(1.)))
});
Vim::action(editor, cx, |vim, _: &PageUp, cx| {
vim.scroll(false, cx, |c| ScrollAmount::Page(-c.unwrap_or(1.)))
});
Vim::action(editor, cx, |vim, _: &ScrollDown, cx| {
vim.scroll(true, cx, |c| {
if let Some(c) = c {
ScrollAmount::Line(c)
} else {
ScrollAmount::Page(0.5)
}
})
});
Vim::action(editor, cx, |vim, _: &ScrollUp, cx| {
vim.scroll(true, cx, |c| {
if let Some(c) = c {
ScrollAmount::Line(-c)
} else {
ScrollAmount::Page(-0.5)
}
})
});
}
impl Vim {
fn scroll(
&mut self,
move_cursor: bool,
cx: &mut ViewContext<Self>,
by: fn(c: Option<f32>) -> ScrollAmount,
) {
let amount = by(self.take_count(cx).map(|c| c as f32));
self.update_editor(cx, |_, editor, cx| {
scroll_editor(editor, move_cursor, &amount, cx)
});
}
}
fn scroll_editor(
editor: &mut Editor,
preserve_cursor_position: bool,
amount: &ScrollAmount,
cx: &mut ViewContext<Editor>,
) {
let should_move_cursor = editor.newest_selection_on_screen(cx).is_eq();
let old_top_anchor = editor.scroll_manager.anchor().anchor;
if editor.scroll_hover(amount, cx) {
return;
}
editor.scroll_screen(amount, cx);
if !should_move_cursor {
return;
}
let visible_line_count = if let Some(visible_line_count) = editor.visible_line_count() {
visible_line_count
} else {
return;
};
let top_anchor = editor.scroll_manager.anchor().anchor;
let vertical_scroll_margin = EditorSettings::get_global(cx).vertical_scroll_margin;
editor.change_selections(None, cx, |s| {
s.move_with(|map, selection| {
let mut head = selection.head();
let top = top_anchor.to_display_point(map);
let starting_column = head.column();
let vertical_scroll_margin =
(vertical_scroll_margin as u32).min(visible_line_count as u32 / 2);
if preserve_cursor_position {
let old_top = old_top_anchor.to_display_point(map);
let new_row = if old_top.row() == top.row() {
DisplayRow(
head.row()
.0
.saturating_add_signed(amount.lines(visible_line_count) as i32),
)
} else {
DisplayRow(top.row().0 + selection.head().row().0 - old_top.row().0)
};
head = map.clip_point(DisplayPoint::new(new_row, head.column()), Bias::Left)
}
let min_row = if top.row().0 == 0 {
DisplayRow(0)
} else {
DisplayRow(top.row().0 + vertical_scroll_margin)
};
let max_row = DisplayRow(map.max_point().row().0.max(top.row().0.saturating_add(
(visible_line_count as u32).saturating_sub(1 + vertical_scroll_margin),
)));
let new_row = if head.row() < min_row {
min_row
} else if head.row() > max_row {
max_row
} else {
head.row()
};
let new_head = map.clip_point(DisplayPoint::new(new_row, starting_column), Bias::Left);
if selection.is_empty() {
selection.collapse_to(new_head, selection.goal)
} else {
selection.set_head(new_head, selection.goal)
};
})
});
}
#[cfg(test)]
mod test {
use crate::{
state::Mode,
test::{NeovimBackedTestContext, VimTestContext},
};
use editor::{EditorSettings, ScrollBeyondLastLine};
use gpui::{point, px, size, Context};
use indoc::indoc;
use language::Point;
use settings::SettingsStore;
pub fn sample_text(rows: usize, cols: usize, start_char: char) -> String {
let mut text = String::new();
for row in 0..rows {
let c: char = (start_char as u32 + row as u32) as u8 as char;
let mut line = c.to_string().repeat(cols);
if row < rows - 1 {
line.push('\n');
}
text += &line;
}
text
}
#[gpui::test]
async fn test_scroll(cx: &mut gpui::TestAppContext) {
let mut cx = VimTestContext::new(cx, true).await;
let (line_height, visible_line_count) = cx.editor(|editor, cx| {
(
editor
.style()
.unwrap()
.text
.line_height_in_pixels(cx.rem_size()),
editor.visible_line_count().unwrap(),
)
});
let window = cx.window;
let margin = cx
.update_window(window, |_, cx| {
cx.viewport_size().height - line_height * visible_line_count
})
.unwrap();
cx.simulate_window_resize(
cx.window,
size(px(1000.), margin + 8. * line_height - px(1.0)),
);
cx.set_state(
indoc!(
"ˇone
two
three
four
five
six
seven
eight
nine
ten
eleven
twelve
"
),
Mode::Normal,
);
cx.update_editor(|editor, cx| {
assert_eq!(editor.snapshot(cx).scroll_position(), point(0., 0.))
});
cx.simulate_keystrokes("ctrl-e");
cx.update_editor(|editor, cx| {
assert_eq!(editor.snapshot(cx).scroll_position(), point(0., 1.))
});
cx.simulate_keystrokes("2 ctrl-e");
cx.update_editor(|editor, cx| {
assert_eq!(editor.snapshot(cx).scroll_position(), point(0., 3.))
});
cx.simulate_keystrokes("ctrl-y");
cx.update_editor(|editor, cx| {
assert_eq!(editor.snapshot(cx).scroll_position(), point(0., 2.))
});
// does not select in normal mode
cx.simulate_keystrokes("g g");
cx.update_editor(|editor, cx| {
assert_eq!(editor.snapshot(cx).scroll_position(), point(0., 0.))
});
cx.simulate_keystrokes("ctrl-d");
cx.update_editor(|editor, cx| {
assert_eq!(editor.snapshot(cx).scroll_position(), point(0., 3.0));
assert_eq!(
editor.selections.newest(cx).range(),
Point::new(6, 0)..Point::new(6, 0)
)
});
// does select in visual mode
cx.simulate_keystrokes("g g");
cx.update_editor(|editor, cx| {
assert_eq!(editor.snapshot(cx).scroll_position(), point(0., 0.))
});
cx.simulate_keystrokes("v ctrl-d");
cx.update_editor(|editor, cx| {
assert_eq!(editor.snapshot(cx).scroll_position(), point(0., 3.0));
assert_eq!(
editor.selections.newest(cx).range(),
Point::new(0, 0)..Point::new(6, 1)
)
});
}
#[gpui::test]
async fn test_ctrl_d_u(cx: &mut gpui::TestAppContext) {
let mut cx = NeovimBackedTestContext::new(cx).await;
cx.set_scroll_height(10).await;
let content = "ˇ".to_owned() + &sample_text(26, 2, 'a');
cx.set_shared_state(&content).await;
// skip over the scrolloff at the top
// test ctrl-d
cx.simulate_shared_keystrokes("4 j ctrl-d").await;
cx.shared_state().await.assert_matches();
cx.simulate_shared_keystrokes("ctrl-d").await;
cx.shared_state().await.assert_matches();
cx.simulate_shared_keystrokes("g g ctrl-d").await;
cx.shared_state().await.assert_matches();
// test ctrl-u
cx.simulate_shared_keystrokes("ctrl-u").await;
cx.shared_state().await.assert_matches();
cx.simulate_shared_keystrokes("ctrl-d ctrl-d 4 j ctrl-u ctrl-u")
.await;
cx.shared_state().await.assert_matches();
// test returning to top
cx.simulate_shared_keystrokes("g g ctrl-d ctrl-u ctrl-u")
.await;
cx.shared_state().await.assert_matches();
}
#[gpui::test]
async fn test_scroll_beyond_last_line(cx: &mut gpui::TestAppContext) {
let mut cx = NeovimBackedTestContext::new(cx).await;
cx.set_scroll_height(10).await;
cx.neovim.set_option(&format!("scrolloff={}", 0)).await;
let content = "ˇ".to_owned() + &sample_text(26, 2, 'a');
cx.set_shared_state(&content).await;
cx.update_global(|store: &mut SettingsStore, cx| {
store.update_user_settings::<EditorSettings>(cx, |s| {
s.scroll_beyond_last_line = Some(ScrollBeyondLastLine::Off)
});
});
// ctrl-d can reach the end and the cursor stays in the first column
cx.simulate_shared_keystrokes("shift-g k").await;
cx.shared_state().await.assert_matches();
cx.simulate_shared_keystrokes("ctrl-d").await;
cx.shared_state().await.assert_matches();
// ctrl-u from the last line
cx.simulate_shared_keystrokes("shift-g").await;
cx.shared_state().await.assert_matches();
cx.simulate_shared_keystrokes("ctrl-u").await;
cx.shared_state().await.assert_matches();
}
}