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Remove SyntaxRewriter usage in insert_use in favor of ted

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This commit is contained in:
Lukas Wirth 2021-04-20 02:05:22 +02:00
parent e8744ed9bb
commit fa20a5064b
8 changed files with 185 additions and 243 deletions
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6
crates/ide_assists/src/handlers/auto_import.rs
View file

@ -101,9 +101,11 @@ pub(crate) fn auto_import(acc: &mut Assists, ctx: &AssistContext) -> Option<()>
format!("Import `{}`", import.import_path),
range,
|builder| {
let rewriter =
let scope = match scope.clone() {
ImportScope::File(it) => ImportScope::File(builder.make_ast_mut(it)),
ImportScope::Module(it) => ImportScope::Module(builder.make_ast_mut(it)),
};
insert_use(&scope, mod_path_to_ast(&import.import_path), ctx.config.insert_use);
builder.rewrite(rewriter);
},
);
}

83
crates/ide_assists/src/handlers/extract_struct_from_enum_variant.rs
View file

@ -13,9 +13,9 @@ use ide_db::{
};
use rustc_hash::FxHashSet;
use syntax::{
algo::{find_node_at_offset, SyntaxRewriter},
ast::{self, edit::IndentLevel, make, AstNode, NameOwner, VisibilityOwner},
SourceFile, SyntaxElement, SyntaxNode, T,
algo::find_node_at_offset,
ast::{self, make, AstNode, NameOwner, VisibilityOwner},
ted, SourceFile, SyntaxElement, SyntaxNode, T,
};
use crate::{AssistContext, AssistId, AssistKind, Assists};
@ -62,14 +62,17 @@ pub(crate) fn extract_struct_from_enum_variant(
let mut visited_modules_set = FxHashSet::default();
let current_module = enum_hir.module(ctx.db());
visited_modules_set.insert(current_module);
let mut def_rewriter = None;
let mut def_file_references = None;
for (file_id, references) in usages {
let mut rewriter = SyntaxRewriter::default();
let source_file = ctx.sema.parse(file_id);
if file_id == ctx.frange.file_id {
def_file_references = Some(references);
continue;
}
builder.edit_file(file_id);
let source_file = builder.make_ast_mut(ctx.sema.parse(file_id));
for reference in references {
update_reference(
ctx,
&mut rewriter,
reference,
&source_file,
&enum_module_def,
@ -77,25 +80,27 @@ pub(crate) fn extract_struct_from_enum_variant(
&mut visited_modules_set,
);
}
if file_id == ctx.frange.file_id {
def_rewriter = Some(rewriter);
continue;
}
builder.edit_file(file_id);
builder.rewrite(rewriter);
builder.edit_file(ctx.frange.file_id);
let variant = builder.make_ast_mut(variant.clone());
let source_file = builder.make_ast_mut(ctx.sema.parse(ctx.frange.file_id));
for reference in def_file_references.into_iter().flatten() {
update_reference(
ctx,
reference,
&source_file,
&enum_module_def,
&variant_hir_name,
&mut visited_modules_set,
);
}
let mut rewriter = def_rewriter.unwrap_or_default();
update_variant(&mut rewriter, &variant);
extract_struct_def(
&mut rewriter,
&enum_ast,
variant_name.clone(),
&field_list,
&variant.parent_enum().syntax().clone().into(),
enum_ast.visibility(),
);
builder.edit_file(ctx.frange.file_id);
builder.rewrite(rewriter);
update_variant(&variant);
},
)
}
@ -138,7 +143,6 @@ fn existing_definition(db: &RootDatabase, variant_name: &ast::Name, variant: &Va
fn insert_import(
ctx: &AssistContext,
rewriter: &mut SyntaxRewriter,
scope_node: &SyntaxNode,
module: &Module,
enum_module_def: &ModuleDef,
@ -151,14 +155,12 @@ fn insert_import(
mod_path.pop_segment();
mod_path.push_segment(variant_hir_name.clone());
let scope = ImportScope::find_insert_use_container(scope_node, &ctx.sema)?;
*rewriter += insert_use(&scope, mod_path_to_ast(&mod_path), ctx.config.insert_use);
insert_use(&scope, mod_path_to_ast(&mod_path), ctx.config.insert_use);
}
Some(())
}
fn extract_struct_def(
rewriter: &mut SyntaxRewriter,
enum_: &ast::Enum,
variant_name: ast::Name,
field_list: &Either<ast::RecordFieldList, ast::TupleFieldList>,
start_offset: &SyntaxElement,
@ -180,33 +182,34 @@ fn extract_struct_def(
.into(),
};
rewriter.insert_before(
start_offset,
make::struct_(visibility, variant_name, None, field_list).syntax(),
ted::insert_raw(
ted::Position::before(start_offset),
make::struct_(visibility, variant_name, None, field_list).clone_for_update().syntax(),
);
rewriter.insert_before(start_offset, &make::tokens::blank_line());
ted::insert_raw(ted::Position::before(start_offset), &make::tokens::blank_line());
if let indent_level @ 1..=usize::MAX = IndentLevel::from_node(enum_.syntax()).0 as usize {
rewriter
.insert_before(start_offset, &make::tokens::whitespace(&" ".repeat(4 * indent_level)));
}
// if let indent_level @ 1..=usize::MAX = IndentLevel::from_node(enum_.syntax()).0 as usize {
// ted::insert(ted::Position::before(start_offset), &make::tokens::blank_line());
// rewriter
// .insert_before(start_offset, &make::tokens::whitespace(&" ".repeat(4 * indent_level)));
// }
Some(())
}
fn update_variant(rewriter: &mut SyntaxRewriter, variant: &ast::Variant) -> Option<()> {
fn update_variant(variant: &ast::Variant) -> Option<()> {
let name = variant.name()?;
let tuple_field = make::tuple_field(None, make::ty(&name.text()));
let replacement = make::variant(
name,
Some(ast::FieldList::TupleFieldList(make::tuple_field_list(iter::once(tuple_field)))),
);
rewriter.replace(variant.syntax(), replacement.syntax());
)
.clone_for_update();
ted::replace(variant.syntax(), replacement.syntax());
Some(())
}
fn update_reference(
ctx: &AssistContext,
rewriter: &mut SyntaxRewriter,
reference: FileReference,
source_file: &SourceFile,
enum_module_def: &ModuleDef,
@ -230,14 +233,16 @@ fn update_reference(
let module = ctx.sema.scope(&expr).module()?;
if !visited_modules_set.contains(&module) {
if insert_import(ctx, rewriter, &expr, &module, enum_module_def, variant_hir_name).is_some()
{
if insert_import(ctx, &expr, &module, enum_module_def, variant_hir_name).is_some() {
visited_modules_set.insert(module);
}
}
rewriter.insert_after(segment.syntax(), &make::token(T!['(']));
rewriter.insert_after(segment.syntax(), segment.syntax());
rewriter.insert_after(&expr, &make::token(T![')']));
ted::insert_raw(
ted::Position::before(segment.syntax()),
make::path_from_text(&format!("{}", segment)).clone_for_update().syntax(),
);
ted::insert_raw(ted::Position::before(segment.syntax()), make::token(T!['(']));
ted::insert_raw(ted::Position::after(&expr), make::token(T![')']));
Some(())
}

28
crates/ide_assists/src/handlers/replace_qualified_name_with_use.rs
View file

@ -1,5 +1,5 @@
use ide_db::helpers::insert_use::{insert_use, ImportScope};
use syntax::{algo::SyntaxRewriter, ast, match_ast, AstNode, SyntaxNode};
use syntax::{ast, match_ast, ted, AstNode, SyntaxNode};
use crate::{AssistContext, AssistId, AssistKind, Assists};
@ -40,18 +40,17 @@ pub(crate) fn replace_qualified_name_with_use(
|builder| {
// Now that we've brought the name into scope, re-qualify all paths that could be
// affected (that is, all paths inside the node we added the `use` to).
let mut rewriter = SyntaxRewriter::default();
shorten_paths(&mut rewriter, syntax.clone(), &path);
let syntax = builder.make_mut(syntax.clone());
if let Some(ref import_scope) = ImportScope::from(syntax.clone()) {
rewriter += insert_use(import_scope, path, ctx.config.insert_use);
builder.rewrite(rewriter);
insert_use(import_scope, path.clone(), ctx.config.insert_use);
}
shorten_paths(syntax.clone(), &path.clone_for_update());
},
)
}
/// Adds replacements to `re` that shorten `path` in all descendants of `node`.
fn shorten_paths(rewriter: &mut SyntaxRewriter<'static>, node: SyntaxNode, path: &ast::Path) {
fn shorten_paths(node: SyntaxNode, path: &ast::Path) {
for child in node.children() {
match_ast! {
match child {
@ -62,32 +61,28 @@ fn shorten_paths(rewriter: &mut SyntaxRewriter<'static>, node: SyntaxNode, path:
ast::Module(_it) => continue,
ast::Path(p) => {
match maybe_replace_path(rewriter, p.clone(), path.clone()) {
match maybe_replace_path(p.clone(), path.clone()) {
Some(()) => {},
None => shorten_paths(rewriter, p.syntax().clone(), path),
None => shorten_paths(p.syntax().clone(), path),
}
},
_ => shorten_paths(rewriter, child, path),
_ => shorten_paths(child, path),
}
}
}
}
fn maybe_replace_path(
rewriter: &mut SyntaxRewriter<'static>,
path: ast::Path,
target: ast::Path,
) -> Option<()> {
fn maybe_replace_path(path: ast::Path, target: ast::Path) -> Option<()> {
if !path_eq(path.clone(), target) {
return None;
}
// Shorten `path`, leaving only its last segment.
if let Some(parent) = path.qualifier() {
rewriter.delete(parent.syntax());
ted::remove(parent.syntax());
}
if let Some(double_colon) = path.coloncolon_token() {
rewriter.delete(&double_colon);
ted::remove(&double_colon);
}
Some(())
@ -150,6 +145,7 @@ Debug
",
);
}
#[test]
fn test_replace_add_use_no_anchor_with_item_below() {
check_assist(

8
crates/ide_completion/src/item.rs
View file

@ -377,11 +377,11 @@ impl ImportEdit {
pub fn to_text_edit(&self, cfg: InsertUseConfig) -> Option<TextEdit> {
let _p = profile::span("ImportEdit::to_text_edit");
let rewriter =
insert_use::insert_use(&self.scope, mod_path_to_ast(&self.import.import_path), cfg);
let old_ast = rewriter.rewrite_root()?;
let new_ast = self.scope.clone_for_update();
insert_use::insert_use(&new_ast, mod_path_to_ast(&self.import.import_path), cfg);
let mut import_insert = TextEdit::builder();
algo::diff(&old_ast, &rewriter.rewrite(&old_ast)).into_text_edit(&mut import_insert);
algo::diff(self.scope.as_syntax_node(), new_ast.as_syntax_node())
.into_text_edit(&mut import_insert);
Some(import_insert.finish())
}

244
crates/ide_db/src/helpers/insert_use.rs
View file

@ -4,13 +4,9 @@ use std::{cmp::Ordering, iter::successors};
use hir::Semantics;
use itertools::{EitherOrBoth, Itertools};
use syntax::{
algo::SyntaxRewriter,
ast::{
self,
edit::{AstNodeEdit, IndentLevel},
make, AstNode, AttrsOwner, PathSegmentKind, VisibilityOwner,
},
AstToken, InsertPosition, NodeOrToken, SyntaxElement, SyntaxNode, SyntaxToken,
algo,
ast::{self, edit::AstNodeEdit, make, AstNode, AttrsOwner, PathSegmentKind, VisibilityOwner},
ted, AstToken, Direction, NodeOrToken, SyntaxNode, SyntaxToken,
};
use crate::RootDatabase;
@ -56,127 +52,32 @@ impl ImportScope {
}
}
fn indent_level(&self) -> IndentLevel {
pub fn clone_for_update(&self) -> Self {
match self {
ImportScope::File(file) => file.indent_level(),
ImportScope::Module(item_list) => item_list.indent_level() + 1,
ImportScope::File(file) => ImportScope::File(file.clone_for_update()),
ImportScope::Module(item_list) => ImportScope::Module(item_list.clone_for_update()),
}
}
fn first_insert_pos(&self) -> (InsertPosition<SyntaxElement>, AddBlankLine) {
match self {
ImportScope::File(_) => (InsertPosition::First, AddBlankLine::AfterTwice),
// don't insert the imports before the item list's opening curly brace
ImportScope::Module(item_list) => item_list
.l_curly_token()
.map(|b| (InsertPosition::After(b.into()), AddBlankLine::Around))
.unwrap_or((InsertPosition::First, AddBlankLine::AfterTwice)),
}
}
fn insert_pos_after_last_inner_element(&self) -> (InsertPosition<SyntaxElement>, AddBlankLine) {
self.as_syntax_node()
.children_with_tokens()
.filter(|child| match child {
NodeOrToken::Node(node) => is_inner_attribute(node.clone()),
NodeOrToken::Token(token) => is_inner_comment(token.clone()),
})
.last()
.map(|last_inner_element| {
(InsertPosition::After(last_inner_element), AddBlankLine::BeforeTwice)
})
.unwrap_or_else(|| self.first_insert_pos())
}
}
fn is_inner_attribute(node: SyntaxNode) -> bool {
ast::Attr::cast(node).map(|attr| attr.kind()) == Some(ast::AttrKind::Inner)
}
fn is_inner_comment(token: SyntaxToken) -> bool {
ast::Comment::cast(token).and_then(|comment| comment.kind().doc)
== Some(ast::CommentPlacement::Inner)
}
/// Insert an import path into the given file/node. A `merge` value of none indicates that no import merging is allowed to occur.
pub fn insert_use<'a>(
scope: &ImportScope,
path: ast::Path,
cfg: InsertUseConfig,
) -> SyntaxRewriter<'a> {
pub fn insert_use<'a>(scope: &ImportScope, path: ast::Path, cfg: InsertUseConfig) {
let _p = profile::span("insert_use");
let mut rewriter = SyntaxRewriter::default();
let use_item = make::use_(None, make::use_tree(path.clone(), None, None, false));
let use_item =
make::use_(None, make::use_tree(path.clone(), None, None, false)).clone_for_update();
// merge into existing imports if possible
if let Some(mb) = cfg.merge {
for existing_use in scope.as_syntax_node().children().filter_map(ast::Use::cast) {
if let Some(merged) = try_merge_imports(&existing_use, &use_item, mb) {
rewriter.replace(existing_use.syntax(), merged.syntax());
return rewriter;
ted::replace(existing_use.syntax(), merged.syntax());
return;
}
}
}
// either we weren't allowed to merge or there is no import that fits the merge conditions
// so look for the place we have to insert to
let (insert_position, add_blank) = find_insert_position(scope, path, cfg.group);
let indent = if let ident_level @ 1..=usize::MAX = scope.indent_level().0 as usize {
Some(make::tokens::whitespace(&" ".repeat(4 * ident_level)).into())
} else {
None
};
let to_insert: Vec<SyntaxElement> = {
let mut buf = Vec::new();
match add_blank {
AddBlankLine::Before | AddBlankLine::Around => {
buf.push(make::tokens::single_newline().into())
}
AddBlankLine::BeforeTwice => buf.push(make::tokens::blank_line().into()),
_ => (),
}
if add_blank.has_before() {
if let Some(indent) = indent.clone() {
cov_mark::hit!(insert_use_indent_before);
buf.push(indent);
}
}
buf.push(use_item.syntax().clone().into());
match add_blank {
AddBlankLine::After | AddBlankLine::Around => {
buf.push(make::tokens::single_newline().into())
}
AddBlankLine::AfterTwice => buf.push(make::tokens::blank_line().into()),
_ => (),
}
// only add indentation *after* our stuff if there's another node directly after it
if add_blank.has_after() && matches!(insert_position, InsertPosition::Before(_)) {
if let Some(indent) = indent {
cov_mark::hit!(insert_use_indent_after);
buf.push(indent);
}
} else if add_blank.has_after() && matches!(insert_position, InsertPosition::After(_)) {
cov_mark::hit!(insert_use_no_indent_after);
}
buf
};
match insert_position {
InsertPosition::First => {
rewriter.insert_many_as_first_children(scope.as_syntax_node(), to_insert)
}
InsertPosition::Last => return rewriter, // actually unreachable
InsertPosition::Before(anchor) => rewriter.insert_many_before(&anchor, to_insert),
InsertPosition::After(anchor) => rewriter.insert_many_after(&anchor, to_insert),
}
rewriter
insert_use_(scope, path, cfg.group, use_item);
}
fn eq_visibility(vis0: Option<ast::Visibility>, vis1: Option<ast::Visibility>) -> bool {
@ -235,7 +136,7 @@ pub fn try_merge_trees(
} else {
(lhs.split_prefix(&lhs_prefix), rhs.split_prefix(&rhs_prefix))
};
recursive_merge(&lhs, &rhs, merge).map(|it| it.clone_for_update())
recursive_merge(&lhs, &rhs, merge)
}
/// Recursively "zips" together lhs and rhs.
@ -334,7 +235,12 @@ fn recursive_merge(
}
}
}
Some(lhs.with_use_tree_list(make::use_tree_list(use_trees)))
Some(if let Some(old) = lhs.use_tree_list() {
lhs.replace_descendant(old, make::use_tree_list(use_trees)).clone_for_update()
} else {
lhs.clone()
})
}
/// Traverses both paths until they differ, returning the common prefix of both.
@ -520,32 +426,15 @@ impl ImportGroup {
}
}
#[derive(PartialEq, Eq)]
enum AddBlankLine {
Before,
BeforeTwice,
Around,
After,
AfterTwice,
}
impl AddBlankLine {
fn has_before(&self) -> bool {
matches!(self, AddBlankLine::Before | AddBlankLine::BeforeTwice | AddBlankLine::Around)
}
fn has_after(&self) -> bool {
matches!(self, AddBlankLine::After | AddBlankLine::AfterTwice | AddBlankLine::Around)
}
}
fn find_insert_position(
fn insert_use_(
scope: &ImportScope,
insert_path: ast::Path,
group_imports: bool,
) -> (InsertPosition<SyntaxElement>, AddBlankLine) {
use_item: ast::Use,
) {
let scope_syntax = scope.as_syntax_node();
let group = ImportGroup::new(&insert_path);
let path_node_iter = scope
.as_syntax_node()
let path_node_iter = scope_syntax
.children()
.filter_map(|node| ast::Use::cast(node.clone()).zip(Some(node)))
.flat_map(|(use_, node)| {
@ -557,9 +446,12 @@ fn find_insert_position(
if !group_imports {
if let Some((_, _, node)) = path_node_iter.last() {
return (InsertPosition::After(node.into()), AddBlankLine::Before);
ted::insert(ted::Position::after(node), use_item.syntax());
} else {
ted::insert(ted::Position::first_child_of(scope_syntax), make::tokens::blank_line());
ted::insert(ted::Position::first_child_of(scope_syntax), use_item.syntax());
}
return (InsertPosition::First, AddBlankLine::AfterTwice);
return;
}
// Iterator that discards anything thats not in the required grouping
@ -572,43 +464,83 @@ fn find_insert_position(
// track the last element we iterated over, if this is still None after the iteration then that means we never iterated in the first place
let mut last = None;
// find the element that would come directly after our new import
let post_insert = group_iter.inspect(|(.., node)| last = Some(node.clone())).find(
|&(ref path, has_tl, _)| {
let post_insert: Option<(_, _, SyntaxNode)> = group_iter
.inspect(|(.., node)| last = Some(node.clone()))
.find(|&(ref path, has_tl, _)| {
use_tree_path_cmp(&insert_path, false, path, has_tl) != Ordering::Greater
},
);
});
match post_insert {
if let Some((.., node)) = post_insert {
// insert our import before that element
Some((.., node)) => (InsertPosition::Before(node.into()), AddBlankLine::After),
return ted::insert(ted::Position::before(node), use_item.syntax());
}
if let Some(node) = last {
// there is no element after our new import, so append it to the end of the group
None => match last {
Some(node) => (InsertPosition::After(node.into()), AddBlankLine::Before),
// the group we were looking for actually doesnt exist, so insert
None => {
// similar concept here to the `last` from above
return ted::insert(ted::Position::after(node), use_item.syntax());
}
// the group we were looking for actually doesn't exist, so insert
let mut last = None;
// find the group that comes after where we want to insert
let post_group = path_node_iter
.inspect(|(.., node)| last = Some(node.clone()))
.find(|(p, ..)| ImportGroup::new(p) > group);
match post_group {
Some((.., node)) => {
(InsertPosition::Before(node.into()), AddBlankLine::AfterTwice)
if let Some((.., node)) = post_group {
ted::insert(ted::Position::before(&node), use_item.syntax());
if let Some(node) = algo::non_trivia_sibling(node.into(), Direction::Prev) {
ted::insert(ted::Position::after(node), make::tokens::single_newline());
}
return;
}
// there is no such group, so append after the last one
None => match last {
Some(node) => {
(InsertPosition::After(node.into()), AddBlankLine::BeforeTwice)
if let Some(node) = last {
ted::insert(ted::Position::after(&node), use_item.syntax());
ted::insert(ted::Position::after(node), make::tokens::single_newline());
return;
}
// there are no imports in this file at all
None => scope.insert_pos_after_last_inner_element(),
},
if let Some(last_inner_element) = scope_syntax
.children_with_tokens()
.filter(|child| match child {
NodeOrToken::Node(node) => is_inner_attribute(node.clone()),
NodeOrToken::Token(token) => is_inner_comment(token.clone()),
})
.last()
{
ted::insert(ted::Position::after(&last_inner_element), use_item.syntax());
ted::insert(ted::Position::after(last_inner_element), make::tokens::single_newline());
return;
}
match scope {
ImportScope::File(_) => {
ted::insert(ted::Position::first_child_of(scope_syntax), make::tokens::blank_line());
ted::insert(ted::Position::first_child_of(scope_syntax), use_item.syntax())
}
// don't insert the imports before the item list's opening curly brace
ImportScope::Module(item_list) => match item_list.l_curly_token() {
Some(b) => {
ted::insert(ted::Position::after(&b), make::tokens::single_newline());
ted::insert(ted::Position::after(&b), use_item.syntax());
}
None => {
ted::insert(
ted::Position::first_child_of(scope_syntax),
make::tokens::blank_line(),
);
ted::insert(ted::Position::first_child_of(scope_syntax), use_item.syntax());
}
},
}
}
fn is_inner_attribute(node: SyntaxNode) -> bool {
ast::Attr::cast(node).map(|attr| attr.kind()) == Some(ast::AttrKind::Inner)
}
fn is_inner_comment(token: SyntaxToken) -> bool {
ast::Comment::cast(token).and_then(|comment| comment.kind().doc)
== Some(ast::CommentPlacement::Inner)
}
#[cfg(test)]
mod tests;

19
crates/ide_db/src/helpers/insert_use/tests.rs
View file

@ -51,17 +51,16 @@ use std::bar::G;",
#[test]
fn insert_start_indent() {
cov_mark::check!(insert_use_indent_after);
check_none(
"std::bar::AA",
r"
use std::bar::B;
use std::bar::D;",
use std::bar::C;",
r"
use std::bar::AA;
use std::bar::B;
use std::bar::D;",
)
use std::bar::C;",
);
}
#[test]
@ -120,7 +119,6 @@ use std::bar::ZZ;",
#[test]
fn insert_end_indent() {
cov_mark::check!(insert_use_indent_before);
check_none(
"std::bar::ZZ",
r"
@ -255,7 +253,6 @@ fn insert_empty_file() {
#[test]
fn insert_empty_module() {
cov_mark::check!(insert_use_no_indent_after);
check(
"foo::bar",
"mod x {}",
@ -615,7 +612,7 @@ fn check(
if module {
syntax = syntax.descendants().find_map(ast::Module::cast).unwrap().syntax().clone();
}
let file = super::ImportScope::from(syntax).unwrap();
let file = super::ImportScope::from(syntax.clone_for_update()).unwrap();
let path = ast::SourceFile::parse(&format!("use {};", path))
.tree()
.syntax()
@ -623,12 +620,8 @@ fn check(
.find_map(ast::Path::cast)
.unwrap();
let rewriter = insert_use(
&file,
path,
InsertUseConfig { merge: mb, prefix_kind: PrefixKind::Plain, group },
);
let result = rewriter.rewrite(file.as_syntax_node()).to_string();
insert_use(&file, path, InsertUseConfig { merge: mb, prefix_kind: PrefixKind::Plain, group });
let result = file.as_syntax_node().to_string();
assert_eq_text!(ra_fixture_after, &result);
}

1
crates/syntax/src/ast/make.rs
View file

@ -598,6 +598,7 @@ pub mod tokens {
SOURCE_FILE
.tree()
.syntax()
.clone_for_update()
.descendants_with_tokens()
.filter_map(|it| it.into_token())
.find(|it| it.kind() == WHITESPACE && it.text() == "\n\n")

17
crates/syntax/src/ted.rs
View file

@ -7,7 +7,7 @@ use std::{mem, ops::RangeInclusive};
use parser::T;
use crate::{
ast::{edit::IndentLevel, make},
ast::{self, edit::IndentLevel, make, AstNode},
SyntaxElement, SyntaxKind, SyntaxNode, SyntaxToken,
};
@ -147,6 +147,16 @@ pub fn append_child_raw(node: &(impl Into<SyntaxNode> + Clone), child: impl Elem
fn ws_before(position: &Position, new: &SyntaxElement) -> Option<SyntaxToken> {
let prev = match &position.repr {
PositionRepr::FirstChild(_) => return None,
PositionRepr::After(it) if it.kind() == SyntaxKind::L_CURLY => {
if new.kind() == SyntaxKind::USE {
if let Some(item_list) = it.parent().and_then(ast::ItemList::cast) {
let mut indent = IndentLevel::from_element(&item_list.syntax().clone().into());
indent.0 += 1;
return Some(make::tokens::whitespace(&format!("\n{}", indent)));
}
}
it
}
PositionRepr::After(it) => it,
};
ws_between(prev, new)
@ -173,7 +183,10 @@ fn ws_between(left: &SyntaxElement, right: &SyntaxElement) -> Option<SyntaxToken
}
if right.kind() == SyntaxKind::USE {
let indent = IndentLevel::from_element(left);
let mut indent = IndentLevel::from_element(left);
if left.kind() == SyntaxKind::USE {
indent.0 = IndentLevel::from_element(right).0.max(indent.0);
}
return Some(make::tokens::whitespace(&format!("\n{}", indent)));
}
Some(make::tokens::single_space())