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Simplify mod completion

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This commit is contained in:
Lukas Wirth 2021-01-07 23:33:52 +01:00
parent ca6db58762
commit 6dca2cbba5
1 changed files with 31 additions and 38 deletions
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67
crates/completion/src/completions/mod_.rs
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@ -1,5 +1,7 @@
//! Completes mod declarations.
use std::iter;
use hir::{Module, ModuleSource};
use ide_db::base_db::{SourceDatabaseExt, VfsPath};
use ide_db::RootDatabase;
@ -12,9 +14,8 @@ use crate::{context::CompletionContext, item::CompletionKind, Completions};
/// Complete mod declaration, i.e. `mod $0 ;`
pub(crate) fn complete_mod(acc: &mut Completions, ctx: &CompletionContext) -> Option<()> {
let mod_under_caret = match &ctx.mod_declaration_under_caret {
Some(mod_under_caret) if mod_under_caret.item_list().is_some() => return None,
Some(mod_under_caret) => mod_under_caret,
None => return None,
Some(mod_under_caret) if mod_under_caret.item_list().is_none() => mod_under_caret,
_ => return None,
};
let _p = profile::span("completion::complete_mod");
@ -49,9 +50,13 @@ pub(crate) fn complete_mod(acc: &mut Completions, ctx: &CompletionContext) -> Op
.filter_map(|submodule_file| {
let submodule_path = source_root.path_for_file(&submodule_file)?;
let directory_with_submodule = submodule_path.parent()?;
match submodule_path.name_and_extension()? {
("lib", Some("rs")) | ("main", Some("rs")) => None,
("mod", Some("rs")) => {
let (name, ext) = submodule_path.name_and_extension()?;
if ext != Some("rs") {
return None;
}
match name {
"lib" | "main" => None,
"mod" => {
if directory_with_submodule.parent()? == directory_to_look_for_submodules {
match directory_with_submodule.name_and_extension()? {
(directory_name, None) => Some(directory_name.to_owned()),
@ -61,9 +66,7 @@ pub(crate) fn complete_mod(acc: &mut Completions, ctx: &CompletionContext) -> Op
None
}
}
(file_name, Some("rs"))
if directory_with_submodule == directory_to_look_for_submodules =>
{
file_name if directory_with_submodule == directory_to_look_for_submodules => {
Some(file_name.to_owned())
}
_ => None,
@ -73,7 +76,7 @@ pub(crate) fn complete_mod(acc: &mut Completions, ctx: &CompletionContext) -> Op
.for_each(|submodule_name| {
let mut label = submodule_name;
if mod_under_caret.semicolon_token().is_none() {
label.push(';')
label.push(';');
}
CompletionItem::new(CompletionKind::Magic, ctx.source_range(), &label)
.kind(CompletionItemKind::Module)
@ -89,11 +92,13 @@ fn directory_to_look_for_submodules(
module_file_path: &VfsPath,
) -> Option<VfsPath> {
let directory_with_module_path = module_file_path.parent()?;
let base_directory = match module_file_path.name_and_extension()? {
("mod", Some("rs")) | ("lib", Some("rs")) | ("main", Some("rs")) => {
Some(directory_with_module_path)
let (name, ext) = module_file_path.name_and_extension()?;
if ext != Some("rs") {
return None;
}
(regular_rust_file_name, Some("rs")) => {
let base_directory = match name {
"mod" | "lib" | "main" => Some(directory_with_module_path),
regular_rust_file_name => {
if matches!(
(
directory_with_module_path
@ -110,37 +115,25 @@ fn directory_to_look_for_submodules(
directory_with_module_path.join(regular_rust_file_name)
}
}
_ => None,
}?;
let mut resulting_path = base_directory;
for module in module_chain_to_containing_module_file(module, db) {
if let Some(name) = module.name(db) {
resulting_path = resulting_path.join(&name.to_string())?;
}
}
Some(resulting_path)
module_chain_to_containing_module_file(module, db)
.into_iter()
.filter_map(|module| module.name(db))
.try_fold(base_directory, |path, name| path.join(&name.to_string()))
}
fn module_chain_to_containing_module_file(
current_module: Module,
db: &RootDatabase,
) -> Vec<Module> {
let mut path = Vec::new();
let mut current_module = Some(current_module);
while let Some(ModuleSource::Module(_)) =
current_module.map(|module| module.definition_source(db).value)
{
if let Some(module) = current_module {
path.insert(0, module);
current_module = module.parent(db);
} else {
current_module = None;
}
}
let mut path =
iter::successors(Some(current_module), |current_module| current_module.parent(db))
.take_while(|current_module| {
matches!(current_module.definition_source(db).value, ModuleSource::Module(_))
})
.collect::<Vec<_>>();
path.reverse();
path
}