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Extract a method for view alignment.

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This commit is contained in:
Blaž Hrastnik 2021-05-08 15:36:27 +09:00
parent adaf861881
commit 1be8b2005d
1 changed files with 32 additions and 27 deletions
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59
helix-term/src/commands.rs
View File

@ -98,6 +98,25 @@ pub fn callback<T, F>(
}
}
enum Align {
Top,
Center,
Bottom,
}
fn align_view(doc: &Document, view: &mut View, align: Align) {
let pos = doc.selection(view.id).cursor();
let line = doc.text().char_to_line(pos);
let relative = match align {
Align::Center => view.area.height as usize / 2,
Align::Top => 0,
Align::Bottom => view.area.height as usize,
};
view.first_line = line.saturating_sub(relative);
}
/// A command is a function that takes the current state and a count, and does a side-effect on the
/// state (usually by creating and applying a transaction).
pub type Command = fn(cx: &mut Context);
@ -616,6 +635,7 @@ fn _search(doc: &mut Document, view: &mut View, contents: &str, regex: &Regex, e
let mat = regex
.find_at(contents, start)
.or_else(|| regex.find(contents));
// TODO: message on wraparound
if let Some(mat) = mat {
let start = text.byte_to_char(mat.start());
let end = text.byte_to_char(mat.end());
@ -630,9 +650,7 @@ fn _search(doc: &mut Document, view: &mut View, contents: &str, regex: &Regex, e
// TODO: (first_match, regex) stuff in register?
doc.set_selection(view.id, selection);
// TODO: extract this centering into a function to share with _goto?
let line = doc.text().char_to_line(head);
view.first_line = line.saturating_sub(view.area.height as usize / 2);
align_view(doc, view, Align::Center);
};
}
@ -1243,8 +1261,7 @@ fn jump_to(
// TODO: convert inside server
let new_pos = lsp_pos_to_pos(doc.text(), definition_pos, offset_encoding);
doc.set_selection(view.id, Selection::point(new_pos));
let line = doc.text().char_to_line(new_pos);
view.first_line = line.saturating_sub(view.area.height as usize / 2);
align_view(doc, view, Align::Center);
}
match locations.as_slice() {
@ -1946,7 +1963,6 @@ pub fn save(cx: &mut Context) {
// Spawns an async task to actually do the saving. This way we prevent blocking.
// TODO: handle save errors somehow?
// TODO: don't block
tokio::spawn(cx.doc().save());
}
@ -2051,8 +2067,6 @@ pub fn hover(cx: &mut Context) {
// TODO: factor out a doc.position_identifier() that returns lsp::TextDocumentPositionIdentifier
// TODO: blocking here is not ideal, make commands async fn?
// not like we can process additional input meanwhile though
let pos = pos_to_lsp_pos(
doc.text(),
doc.selection(view.id).cursor(),
@ -2137,11 +2151,9 @@ pub fn jump_forward(cx: &mut Context) {
if let Some((id, selection)) = view.jumps.forward(count) {
view.doc = *id;
let selection = selection.clone();
let cursor = selection.cursor();
doc.set_selection(view.id, selection);
// TODO: extract this centering into a function to share with _goto?
let line = doc.text().char_to_line(cursor);
view.first_line = line.saturating_sub(view.area.height as usize / 2);
align_view(doc, view, Align::Center);
};
}
@ -2151,12 +2163,9 @@ pub fn jump_backward(cx: &mut Context) {
if let Some((id, selection)) = view.jumps.backward(count) {
view.doc = *id;
let selection = selection.clone();
let cursor = selection.cursor();
doc.set_selection(view.id, selection);
// TODO: extract this centering into a function to share with _goto?
let line = doc.text().char_to_line(cursor);
view.first_line = line.saturating_sub(view.area.height as usize / 2);
doc.set_selection(view.id, selection.clone());
align_view(doc, view, Align::Center);
};
}
@ -2216,17 +2225,13 @@ pub fn view_mode(cx: &mut Context) {
// bottom
| 'b' => {
let (view, doc) = cx.current();
let pos = doc.selection(view.id).cursor();
// TODO: extract this centering into a function to share with _goto?
let line = doc.text().char_to_line(pos);
let relative = match ch {
'z' | 'c' => view.area.height as usize / 2,
't' => 0,
'b' => view.area.height as usize,
align_view(doc, view, match ch {
'z' | 'c' => Align::Center,
't' => Align::Top,
'b' => Align::Bottom,
_ => unreachable!()
};
view.first_line = line.saturating_sub(relative);
});
}
'm' => {
let (view, doc) = cx.current();