TudbuT/helix-mods
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Clear line on <ret> when line is all whitespace (#4854)

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This matches the insert-mode behavior for Vim and Kakoune: if the
current line is empty except for whitespace, `<ret>` should insert a
line ending at the beginning of the line, moving any indentation to the
next line.
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Michael Davis 2022-11-24 20:40:48 -06:00 • committed by GitHub
parent e6dad960cf
commit 2271c3aed9
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1 changed files with 53 additions and 34 deletions
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87
helix-term/src/commands.rs
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@ -3085,40 +3085,59 @@ pub mod insert {
let curr = contents.get_char(pos).unwrap_or(' ');
let current_line = text.char_to_line(pos);
let indent = indent::indent_for_newline(
doc.language_config(),
doc.syntax(),
&doc.indent_style,
doc.tab_width(),
text,
current_line,
pos,
current_line,
);
let mut text = String::new();
// If we are between pairs (such as brackets), we want to
// insert an additional line which is indented one level
// more and place the cursor there
let on_auto_pair = doc
.auto_pairs(cx.editor)
.and_then(|pairs| pairs.get(prev))
.and_then(|pair| if pair.close == curr { Some(pair) } else { None })
.is_some();
let line_is_only_whitespace = text
.line(current_line)
.chars()
.all(|char| char.is_ascii_whitespace());
let local_offs = if on_auto_pair {
let inner_indent = indent.clone() + doc.indent_style.as_str();
text.reserve_exact(2 + indent.len() + inner_indent.len());
text.push_str(doc.line_ending.as_str());
text.push_str(&inner_indent);
let local_offs = text.chars().count();
text.push_str(doc.line_ending.as_str());
text.push_str(&indent);
local_offs
let mut new_text = String::new();
// If the current line is all whitespace, insert a line ending at the beginning of
// the current line. This makes the current line empty and the new line contain the
// indentation of the old line.
let (from, to, local_offs) = if line_is_only_whitespace {
let line_start = text.line_to_char(current_line);
new_text.push_str(doc.line_ending.as_str());
(line_start, line_start, new_text.chars().count())
} else {
text.reserve_exact(1 + indent.len());
text.push_str(doc.line_ending.as_str());
text.push_str(&indent);
text.chars().count()
let indent = indent::indent_for_newline(
doc.language_config(),
doc.syntax(),
&doc.indent_style,
doc.tab_width(),
text,
current_line,
pos,
current_line,
);
// If we are between pairs (such as brackets), we want to
// insert an additional line which is indented one level
// more and place the cursor there
let on_auto_pair = doc
.auto_pairs(cx.editor)
.and_then(|pairs| pairs.get(prev))
.and_then(|pair| if pair.close == curr { Some(pair) } else { None })
.is_some();
let local_offs = if on_auto_pair {
let inner_indent = indent.clone() + doc.indent_style.as_str();
new_text.reserve_exact(2 + indent.len() + inner_indent.len());
new_text.push_str(doc.line_ending.as_str());
new_text.push_str(&inner_indent);
let local_offs = new_text.chars().count();
new_text.push_str(doc.line_ending.as_str());
new_text.push_str(&indent);
local_offs
} else {
new_text.reserve_exact(1 + indent.len());
new_text.push_str(doc.line_ending.as_str());
new_text.push_str(&indent);
new_text.chars().count()
};
(pos, pos, local_offs)
};
let new_range = if doc.restore_cursor {
@ -3139,9 +3158,9 @@ pub mod insert {
// range.replace(|range| range.is_empty(), head); -> fn extend if cond true, new head pos
// can be used with cx.mode to do replace or extend on most changes
ranges.push(new_range);
global_offs += text.chars().count();
global_offs += new_text.chars().count();
(pos, pos, Some(text.into()))
(from, to, Some(new_text.into()))
});
transaction = transaction.with_selection(Selection::new(ranges, selection.primary_index()));