Improve dedent behavior (#1232)

* tmp add code for dedent

* finish normal_mode with dedent behavior

* use function pointer

* rebase from origin

* check dedent condition inside normal_mode implementation

* using if let...

* fix check

* using char_is_whitespace instead of ch.is_whitespace

* fix clippy

* abstract restore_indent function
pull/1330/head
WindSoilder 3 years ago committed by GitHub
parent 5b4540fc2d
commit 600ce70cf6
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23

@ -3610,6 +3610,7 @@ fn normal_mode(cx: &mut Context) {
doc.mode = Mode::Normal;
try_restore_indent(doc, view.id);
doc.append_changes_to_history(view.id);
// if leaving append mode, move cursor back by 1
@ -3627,6 +3628,36 @@ fn normal_mode(cx: &mut Context) {
}
}
fn try_restore_indent(doc: &mut Document, view_id: ViewId) {
let doc_changes = doc.changes().changes();
let text = doc.text().slice(..);
let pos = doc.selection(view_id).primary().cursor(text);
let mut can_restore_indent = false;
// Removes trailing whitespace if insert mode is exited after starting a blank new line.
use helix_core::chars::char_is_whitespace;
use helix_core::Operation;
if let [Operation::Retain(move_pos), Operation::Insert(ref inserted_str), Operation::Retain(_)] =
doc_changes
{
if move_pos + inserted_str.len32() as usize == pos
&& inserted_str.starts_with('\n')
&& inserted_str.chars().skip(1).all(char_is_whitespace)
{
can_restore_indent = true;
}
}
if can_restore_indent {
let transaction =
Transaction::change_by_selection(doc.text(), doc.selection(view_id), |range| {
let line_start_pos = text.line_to_char(range.cursor_line(text));
(line_start_pos, pos, None)
});
doc.apply(&transaction, view_id);
}
}
// Store a jump on the jumplist.
fn push_jump(editor: &mut Editor) {
let (view, doc) = current!(editor);

@ -889,6 +889,10 @@ impl Document {
self.indent_style.as_str()
}
pub fn changes(&self) -> &ChangeSet {
&self.changes
}
#[inline]
/// File path on disk.
pub fn path(&self) -> Option<&PathBuf> {

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