775 lines
15 KiB
Rust
775 lines
15 KiB
Rust
use assists::utils::extract_trivial_expression;
|
|
use itertools::Itertools;
|
|
use syntax::{
|
|
algo::non_trivia_sibling,
|
|
ast::{self, AstNode, AstToken},
|
|
Direction, NodeOrToken, SourceFile,
|
|
SyntaxKind::{self, USE_TREE, WHITESPACE},
|
|
SyntaxNode, SyntaxToken, TextRange, TextSize, T,
|
|
};
|
|
use text_edit::{TextEdit, TextEditBuilder};
|
|
|
|
// Feature: Join Lines
|
|
//
|
|
// Join selected lines into one, smartly fixing up whitespace, trailing commas, and braces.
|
|
//
|
|
// |===
|
|
// | Editor | Action Name
|
|
//
|
|
// | VS Code | **Rust Analyzer: Join lines**
|
|
// |===
|
|
pub(crate) fn join_lines(file: &SourceFile, range: TextRange) -> TextEdit {
|
|
let range = if range.is_empty() {
|
|
let syntax = file.syntax();
|
|
let text = syntax.text().slice(range.start()..);
|
|
let pos = match text.find_char('\n') {
|
|
None => return TextEdit::builder().finish(),
|
|
Some(pos) => pos,
|
|
};
|
|
TextRange::at(range.start() + pos, TextSize::of('\n'))
|
|
} else {
|
|
range
|
|
};
|
|
|
|
let node = match file.syntax().covering_element(range) {
|
|
NodeOrToken::Node(node) => node,
|
|
NodeOrToken::Token(token) => token.parent(),
|
|
};
|
|
let mut edit = TextEdit::builder();
|
|
for token in node.descendants_with_tokens().filter_map(|it| it.into_token()) {
|
|
let range = match range.intersect(token.text_range()) {
|
|
Some(range) => range,
|
|
None => continue,
|
|
} - token.text_range().start();
|
|
let text = token.text();
|
|
for (pos, _) in text[range].bytes().enumerate().filter(|&(_, b)| b == b'\n') {
|
|
let pos: TextSize = (pos as u32).into();
|
|
let off = token.text_range().start() + range.start() + pos;
|
|
if !edit.invalidates_offset(off) {
|
|
remove_newline(&mut edit, &token, off);
|
|
}
|
|
}
|
|
}
|
|
|
|
edit.finish()
|
|
}
|
|
|
|
fn remove_newline(edit: &mut TextEditBuilder, token: &SyntaxToken, offset: TextSize) {
|
|
if token.kind() != WHITESPACE || token.text().bytes().filter(|&b| b == b'\n').count() != 1 {
|
|
// The node is either the first or the last in the file
|
|
let suff = &token.text()[TextRange::new(
|
|
offset - token.text_range().start() + TextSize::of('\n'),
|
|
TextSize::of(token.text()),
|
|
)];
|
|
let spaces = suff.bytes().take_while(|&b| b == b' ').count();
|
|
|
|
edit.replace(TextRange::at(offset, ((spaces + 1) as u32).into()), " ".to_string());
|
|
return;
|
|
}
|
|
|
|
// The node is between two other nodes
|
|
let prev = token.prev_sibling_or_token().unwrap();
|
|
let next = token.next_sibling_or_token().unwrap();
|
|
if is_trailing_comma(prev.kind(), next.kind()) {
|
|
// Removes: trailing comma, newline (incl. surrounding whitespace)
|
|
edit.delete(TextRange::new(prev.text_range().start(), token.text_range().end()));
|
|
return;
|
|
}
|
|
if prev.kind() == T![,] && next.kind() == T!['}'] {
|
|
// Removes: comma, newline (incl. surrounding whitespace)
|
|
let space = if let Some(left) = prev.prev_sibling_or_token() {
|
|
compute_ws(left.kind(), next.kind())
|
|
} else {
|
|
" "
|
|
};
|
|
edit.replace(
|
|
TextRange::new(prev.text_range().start(), token.text_range().end()),
|
|
space.to_string(),
|
|
);
|
|
return;
|
|
}
|
|
|
|
if let (Some(_), Some(next)) = (
|
|
prev.as_token().cloned().and_then(ast::Comment::cast),
|
|
next.as_token().cloned().and_then(ast::Comment::cast),
|
|
) {
|
|
// Removes: newline (incl. surrounding whitespace), start of the next comment
|
|
edit.delete(TextRange::new(
|
|
token.text_range().start(),
|
|
next.syntax().text_range().start() + TextSize::of(next.prefix()),
|
|
));
|
|
return;
|
|
}
|
|
|
|
// Special case that turns something like:
|
|
//
|
|
// ```
|
|
// my_function({$0
|
|
// <some-expr>
|
|
// })
|
|
// ```
|
|
//
|
|
// into `my_function(<some-expr>)`
|
|
if join_single_expr_block(edit, token).is_some() {
|
|
return;
|
|
}
|
|
// ditto for
|
|
//
|
|
// ```
|
|
// use foo::{$0
|
|
// bar
|
|
// };
|
|
// ```
|
|
if join_single_use_tree(edit, token).is_some() {
|
|
return;
|
|
}
|
|
|
|
// Remove newline but add a computed amount of whitespace characters
|
|
edit.replace(token.text_range(), compute_ws(prev.kind(), next.kind()).to_string());
|
|
}
|
|
|
|
fn has_comma_after(node: &SyntaxNode) -> bool {
|
|
match non_trivia_sibling(node.clone().into(), Direction::Next) {
|
|
Some(n) => n.kind() == T![,],
|
|
_ => false,
|
|
}
|
|
}
|
|
|
|
fn join_single_expr_block(edit: &mut TextEditBuilder, token: &SyntaxToken) -> Option<()> {
|
|
let block_expr = ast::BlockExpr::cast(token.parent())?;
|
|
if !block_expr.is_standalone() {
|
|
return None;
|
|
}
|
|
let expr = extract_trivial_expression(&block_expr)?;
|
|
|
|
let block_range = block_expr.syntax().text_range();
|
|
let mut buf = expr.syntax().text().to_string();
|
|
|
|
// Match block needs to have a comma after the block
|
|
if let Some(match_arm) = block_expr.syntax().parent().and_then(ast::MatchArm::cast) {
|
|
if !has_comma_after(match_arm.syntax()) {
|
|
buf.push(',');
|
|
}
|
|
}
|
|
|
|
edit.replace(block_range, buf);
|
|
|
|
Some(())
|
|
}
|
|
|
|
fn join_single_use_tree(edit: &mut TextEditBuilder, token: &SyntaxToken) -> Option<()> {
|
|
let use_tree_list = ast::UseTreeList::cast(token.parent())?;
|
|
let (tree,) = use_tree_list.use_trees().collect_tuple()?;
|
|
edit.replace(use_tree_list.syntax().text_range(), tree.syntax().text().to_string());
|
|
Some(())
|
|
}
|
|
|
|
fn is_trailing_comma(left: SyntaxKind, right: SyntaxKind) -> bool {
|
|
matches!((left, right), (T![,], T![')']) | (T![,], T![']']))
|
|
}
|
|
|
|
fn compute_ws(left: SyntaxKind, right: SyntaxKind) -> &'static str {
|
|
match left {
|
|
T!['('] | T!['['] => return "",
|
|
T!['{'] => {
|
|
if let USE_TREE = right {
|
|
return "";
|
|
}
|
|
}
|
|
_ => (),
|
|
}
|
|
match right {
|
|
T![')'] | T![']'] => return "",
|
|
T!['}'] => {
|
|
if let USE_TREE = left {
|
|
return "";
|
|
}
|
|
}
|
|
T![.] => return "",
|
|
_ => (),
|
|
}
|
|
" "
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use syntax::SourceFile;
|
|
use test_utils::{add_cursor, assert_eq_text, extract_offset, extract_range};
|
|
|
|
use super::*;
|
|
|
|
fn check_join_lines(ra_fixture_before: &str, ra_fixture_after: &str) {
|
|
let (before_cursor_pos, before) = extract_offset(ra_fixture_before);
|
|
let file = SourceFile::parse(&before).ok().unwrap();
|
|
|
|
let range = TextRange::empty(before_cursor_pos);
|
|
let result = join_lines(&file, range);
|
|
|
|
let actual = {
|
|
let mut actual = before.to_string();
|
|
result.apply(&mut actual);
|
|
actual
|
|
};
|
|
let actual_cursor_pos = result
|
|
.apply_to_offset(before_cursor_pos)
|
|
.expect("cursor position is affected by the edit");
|
|
let actual = add_cursor(&actual, actual_cursor_pos);
|
|
assert_eq_text!(ra_fixture_after, &actual);
|
|
}
|
|
|
|
#[test]
|
|
fn test_join_lines_comma() {
|
|
check_join_lines(
|
|
r"
|
|
fn foo() {
|
|
$0foo(1,
|
|
)
|
|
}
|
|
",
|
|
r"
|
|
fn foo() {
|
|
$0foo(1)
|
|
}
|
|
",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn test_join_lines_lambda_block() {
|
|
check_join_lines(
|
|
r"
|
|
pub fn reparse(&self, edit: &AtomTextEdit) -> File {
|
|
$0self.incremental_reparse(edit).unwrap_or_else(|| {
|
|
self.full_reparse(edit)
|
|
})
|
|
}
|
|
",
|
|
r"
|
|
pub fn reparse(&self, edit: &AtomTextEdit) -> File {
|
|
$0self.incremental_reparse(edit).unwrap_or_else(|| self.full_reparse(edit))
|
|
}
|
|
",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn test_join_lines_block() {
|
|
check_join_lines(
|
|
r"
|
|
fn foo() {
|
|
foo($0{
|
|
92
|
|
})
|
|
}",
|
|
r"
|
|
fn foo() {
|
|
foo($092)
|
|
}",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn test_join_lines_diverging_block() {
|
|
check_join_lines(
|
|
r"
|
|
fn foo() {
|
|
loop {
|
|
match x {
|
|
92 => $0{
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
",
|
|
r"
|
|
fn foo() {
|
|
loop {
|
|
match x {
|
|
92 => $0continue,
|
|
}
|
|
}
|
|
}
|
|
",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn join_lines_adds_comma_for_block_in_match_arm() {
|
|
check_join_lines(
|
|
r"
|
|
fn foo(e: Result<U, V>) {
|
|
match e {
|
|
Ok(u) => $0{
|
|
u.foo()
|
|
}
|
|
Err(v) => v,
|
|
}
|
|
}",
|
|
r"
|
|
fn foo(e: Result<U, V>) {
|
|
match e {
|
|
Ok(u) => $0u.foo(),
|
|
Err(v) => v,
|
|
}
|
|
}",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn join_lines_multiline_in_block() {
|
|
check_join_lines(
|
|
r"
|
|
fn foo() {
|
|
match ty {
|
|
$0 Some(ty) => {
|
|
match ty {
|
|
_ => false,
|
|
}
|
|
}
|
|
_ => true,
|
|
}
|
|
}
|
|
",
|
|
r"
|
|
fn foo() {
|
|
match ty {
|
|
$0 Some(ty) => match ty {
|
|
_ => false,
|
|
},
|
|
_ => true,
|
|
}
|
|
}
|
|
",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn join_lines_keeps_comma_for_block_in_match_arm() {
|
|
// We already have a comma
|
|
check_join_lines(
|
|
r"
|
|
fn foo(e: Result<U, V>) {
|
|
match e {
|
|
Ok(u) => $0{
|
|
u.foo()
|
|
},
|
|
Err(v) => v,
|
|
}
|
|
}",
|
|
r"
|
|
fn foo(e: Result<U, V>) {
|
|
match e {
|
|
Ok(u) => $0u.foo(),
|
|
Err(v) => v,
|
|
}
|
|
}",
|
|
);
|
|
|
|
// comma with whitespace between brace and ,
|
|
check_join_lines(
|
|
r"
|
|
fn foo(e: Result<U, V>) {
|
|
match e {
|
|
Ok(u) => $0{
|
|
u.foo()
|
|
} ,
|
|
Err(v) => v,
|
|
}
|
|
}",
|
|
r"
|
|
fn foo(e: Result<U, V>) {
|
|
match e {
|
|
Ok(u) => $0u.foo() ,
|
|
Err(v) => v,
|
|
}
|
|
}",
|
|
);
|
|
|
|
// comma with newline between brace and ,
|
|
check_join_lines(
|
|
r"
|
|
fn foo(e: Result<U, V>) {
|
|
match e {
|
|
Ok(u) => $0{
|
|
u.foo()
|
|
}
|
|
,
|
|
Err(v) => v,
|
|
}
|
|
}",
|
|
r"
|
|
fn foo(e: Result<U, V>) {
|
|
match e {
|
|
Ok(u) => $0u.foo()
|
|
,
|
|
Err(v) => v,
|
|
}
|
|
}",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn join_lines_keeps_comma_with_single_arg_tuple() {
|
|
// A single arg tuple
|
|
check_join_lines(
|
|
r"
|
|
fn foo() {
|
|
let x = ($0{
|
|
4
|
|
},);
|
|
}",
|
|
r"
|
|
fn foo() {
|
|
let x = ($04,);
|
|
}",
|
|
);
|
|
|
|
// single arg tuple with whitespace between brace and comma
|
|
check_join_lines(
|
|
r"
|
|
fn foo() {
|
|
let x = ($0{
|
|
4
|
|
} ,);
|
|
}",
|
|
r"
|
|
fn foo() {
|
|
let x = ($04 ,);
|
|
}",
|
|
);
|
|
|
|
// single arg tuple with newline between brace and comma
|
|
check_join_lines(
|
|
r"
|
|
fn foo() {
|
|
let x = ($0{
|
|
4
|
|
}
|
|
,);
|
|
}",
|
|
r"
|
|
fn foo() {
|
|
let x = ($04
|
|
,);
|
|
}",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn test_join_lines_use_items_left() {
|
|
// No space after the '{'
|
|
check_join_lines(
|
|
r"
|
|
$0use syntax::{
|
|
TextSize, TextRange,
|
|
};",
|
|
r"
|
|
$0use syntax::{TextSize, TextRange,
|
|
};",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn test_join_lines_use_items_right() {
|
|
// No space after the '}'
|
|
check_join_lines(
|
|
r"
|
|
use syntax::{
|
|
$0 TextSize, TextRange
|
|
};",
|
|
r"
|
|
use syntax::{
|
|
$0 TextSize, TextRange};",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn test_join_lines_use_items_right_comma() {
|
|
// No space after the '}'
|
|
check_join_lines(
|
|
r"
|
|
use syntax::{
|
|
$0 TextSize, TextRange,
|
|
};",
|
|
r"
|
|
use syntax::{
|
|
$0 TextSize, TextRange};",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn test_join_lines_use_tree() {
|
|
check_join_lines(
|
|
r"
|
|
use syntax::{
|
|
algo::$0{
|
|
find_token_at_offset,
|
|
},
|
|
ast,
|
|
};",
|
|
r"
|
|
use syntax::{
|
|
algo::$0find_token_at_offset,
|
|
ast,
|
|
};",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn test_join_lines_normal_comments() {
|
|
check_join_lines(
|
|
r"
|
|
fn foo() {
|
|
// Hello$0
|
|
// world!
|
|
}
|
|
",
|
|
r"
|
|
fn foo() {
|
|
// Hello$0 world!
|
|
}
|
|
",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn test_join_lines_doc_comments() {
|
|
check_join_lines(
|
|
r"
|
|
fn foo() {
|
|
/// Hello$0
|
|
/// world!
|
|
}
|
|
",
|
|
r"
|
|
fn foo() {
|
|
/// Hello$0 world!
|
|
}
|
|
",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn test_join_lines_mod_comments() {
|
|
check_join_lines(
|
|
r"
|
|
fn foo() {
|
|
//! Hello$0
|
|
//! world!
|
|
}
|
|
",
|
|
r"
|
|
fn foo() {
|
|
//! Hello$0 world!
|
|
}
|
|
",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn test_join_lines_multiline_comments_1() {
|
|
check_join_lines(
|
|
r"
|
|
fn foo() {
|
|
// Hello$0
|
|
/* world! */
|
|
}
|
|
",
|
|
r"
|
|
fn foo() {
|
|
// Hello$0 world! */
|
|
}
|
|
",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn test_join_lines_multiline_comments_2() {
|
|
check_join_lines(
|
|
r"
|
|
fn foo() {
|
|
// The$0
|
|
/* quick
|
|
brown
|
|
fox! */
|
|
}
|
|
",
|
|
r"
|
|
fn foo() {
|
|
// The$0 quick
|
|
brown
|
|
fox! */
|
|
}
|
|
",
|
|
);
|
|
}
|
|
|
|
fn check_join_lines_sel(ra_fixture_before: &str, ra_fixture_after: &str) {
|
|
let (sel, before) = extract_range(ra_fixture_before);
|
|
let parse = SourceFile::parse(&before);
|
|
let result = join_lines(&parse.tree(), sel);
|
|
let actual = {
|
|
let mut actual = before.to_string();
|
|
result.apply(&mut actual);
|
|
actual
|
|
};
|
|
assert_eq_text!(ra_fixture_after, &actual);
|
|
}
|
|
|
|
#[test]
|
|
fn test_join_lines_selection_fn_args() {
|
|
check_join_lines_sel(
|
|
r"
|
|
fn foo() {
|
|
$0foo(1,
|
|
2,
|
|
3,
|
|
$0)
|
|
}
|
|
",
|
|
r"
|
|
fn foo() {
|
|
foo(1, 2, 3)
|
|
}
|
|
",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn test_join_lines_selection_struct() {
|
|
check_join_lines_sel(
|
|
r"
|
|
struct Foo $0{
|
|
f: u32,
|
|
}$0
|
|
",
|
|
r"
|
|
struct Foo { f: u32 }
|
|
",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn test_join_lines_selection_dot_chain() {
|
|
check_join_lines_sel(
|
|
r"
|
|
fn foo() {
|
|
join($0type_params.type_params()
|
|
.filter_map(|it| it.name())
|
|
.map(|it| it.text())$0)
|
|
}",
|
|
r"
|
|
fn foo() {
|
|
join(type_params.type_params().filter_map(|it| it.name()).map(|it| it.text()))
|
|
}",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn test_join_lines_selection_lambda_block_body() {
|
|
check_join_lines_sel(
|
|
r"
|
|
pub fn handle_find_matching_brace() {
|
|
params.offsets
|
|
.map(|offset| $0{
|
|
world.analysis().matching_brace(&file, offset).unwrap_or(offset)
|
|
}$0)
|
|
.collect();
|
|
}",
|
|
r"
|
|
pub fn handle_find_matching_brace() {
|
|
params.offsets
|
|
.map(|offset| world.analysis().matching_brace(&file, offset).unwrap_or(offset))
|
|
.collect();
|
|
}",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn test_join_lines_commented_block() {
|
|
check_join_lines(
|
|
r"
|
|
fn main() {
|
|
let _ = {
|
|
// $0foo
|
|
// bar
|
|
92
|
|
};
|
|
}
|
|
",
|
|
r"
|
|
fn main() {
|
|
let _ = {
|
|
// $0foo bar
|
|
92
|
|
};
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn join_lines_mandatory_blocks_block() {
|
|
check_join_lines(
|
|
r"
|
|
$0fn foo() {
|
|
92
|
|
}
|
|
",
|
|
r"
|
|
$0fn foo() { 92
|
|
}
|
|
",
|
|
);
|
|
|
|
check_join_lines(
|
|
r"
|
|
fn foo() {
|
|
$0if true {
|
|
92
|
|
}
|
|
}
|
|
",
|
|
r"
|
|
fn foo() {
|
|
$0if true { 92
|
|
}
|
|
}
|
|
",
|
|
);
|
|
|
|
check_join_lines(
|
|
r"
|
|
fn foo() {
|
|
$0loop {
|
|
92
|
|
}
|
|
}
|
|
",
|
|
r"
|
|
fn foo() {
|
|
$0loop { 92
|
|
}
|
|
}
|
|
",
|
|
);
|
|
|
|
check_join_lines(
|
|
r"
|
|
fn foo() {
|
|
$0unsafe {
|
|
92
|
|
}
|
|
}
|
|
",
|
|
r"
|
|
fn foo() {
|
|
$0unsafe { 92
|
|
}
|
|
}
|
|
",
|
|
);
|
|
}
|
|
}
|