442 lines
8.1 KiB
Rust
442 lines
8.1 KiB
Rust
use ide_db::helpers::merge_imports::{try_merge_imports, try_merge_trees, MergeBehavior};
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use syntax::{algo::neighbor, ast, ted, AstNode};
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use crate::{
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assist_context::{AssistContext, Assists},
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utils::next_prev,
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AssistId, AssistKind,
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};
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// Assist: merge_imports
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//
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// Merges two imports with a common prefix.
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//
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// ```
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// use std::$0fmt::Formatter;
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// use std::io;
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// ```
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// ->
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// ```
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// use std::{fmt::Formatter, io};
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// ```
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pub(crate) fn merge_imports(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
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let tree: ast::UseTree = ctx.find_node_at_offset()?;
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let mut imports = None;
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let mut uses = None;
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if let Some(use_item) = tree.syntax().parent().and_then(ast::Use::cast) {
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let (merged, to_remove) =
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next_prev().filter_map(|dir| neighbor(&use_item, dir)).find_map(|use_item2| {
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try_merge_imports(&use_item, &use_item2, MergeBehavior::Crate).zip(Some(use_item2))
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})?;
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imports = Some((use_item, merged, to_remove));
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} else {
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let (merged, to_remove) =
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next_prev().filter_map(|dir| neighbor(&tree, dir)).find_map(|use_tree| {
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try_merge_trees(&tree, &use_tree, MergeBehavior::Crate).zip(Some(use_tree))
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})?;
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uses = Some((tree.clone(), merged, to_remove))
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};
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let target = tree.syntax().text_range();
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acc.add(
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AssistId("merge_imports", AssistKind::RefactorRewrite),
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"Merge imports",
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target,
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|builder| {
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if let Some((to_replace, replacement, to_remove)) = imports {
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let to_replace = builder.make_mut(to_replace);
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let to_remove = builder.make_mut(to_remove);
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ted::replace(to_replace.syntax(), replacement.syntax());
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to_remove.remove();
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}
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if let Some((to_replace, replacement, to_remove)) = uses {
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let to_replace = builder.make_mut(to_replace);
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let to_remove = builder.make_mut(to_remove);
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ted::replace(to_replace.syntax(), replacement.syntax());
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to_remove.remove()
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}
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},
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)
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}
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#[cfg(test)]
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mod tests {
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use crate::tests::{check_assist, check_assist_not_applicable};
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use super::*;
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#[test]
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fn test_merge_equal() {
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check_assist(
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merge_imports,
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r"
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use std::fmt$0::{Display, Debug};
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use std::fmt::{Display, Debug};
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",
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r"
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use std::fmt::{Display, Debug};
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",
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)
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}
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#[test]
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fn test_merge_first() {
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check_assist(
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merge_imports,
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r"
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use std::fmt$0::Debug;
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use std::fmt::Display;
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",
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r"
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use std::fmt::{Debug, Display};
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",
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)
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}
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#[test]
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fn test_merge_second() {
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check_assist(
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merge_imports,
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r"
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use std::fmt::Debug;
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use std::fmt$0::Display;
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",
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r"
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use std::fmt::{Display, Debug};
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",
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);
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}
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#[test]
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fn merge_self1() {
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check_assist(
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merge_imports,
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r"
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use std::fmt$0;
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use std::fmt::Display;
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",
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r"
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use std::fmt::{self, Display};
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",
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);
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}
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#[test]
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fn merge_self2() {
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check_assist(
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merge_imports,
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r"
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use std::{fmt, $0fmt::Display};
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",
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r"
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use std::{fmt::{Display, self}};
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",
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);
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}
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#[test]
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fn skip_pub1() {
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check_assist_not_applicable(
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merge_imports,
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r"
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pub use std::fmt$0::Debug;
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use std::fmt::Display;
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",
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);
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}
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#[test]
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fn skip_pub_last() {
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check_assist_not_applicable(
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merge_imports,
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r"
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use std::fmt$0::Debug;
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pub use std::fmt::Display;
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",
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);
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}
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#[test]
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fn skip_pub_crate_pub() {
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check_assist_not_applicable(
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merge_imports,
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r"
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pub(crate) use std::fmt$0::Debug;
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pub use std::fmt::Display;
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",
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);
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}
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#[test]
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fn skip_pub_pub_crate() {
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check_assist_not_applicable(
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merge_imports,
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r"
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pub use std::fmt$0::Debug;
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pub(crate) use std::fmt::Display;
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",
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);
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}
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#[test]
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fn merge_pub() {
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check_assist(
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merge_imports,
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r"
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pub use std::fmt$0::Debug;
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pub use std::fmt::Display;
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",
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r"
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pub use std::fmt::{Debug, Display};
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",
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)
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}
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#[test]
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fn merge_pub_crate() {
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check_assist(
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merge_imports,
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r"
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pub(crate) use std::fmt$0::Debug;
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pub(crate) use std::fmt::Display;
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",
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r"
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pub(crate) use std::fmt::{Debug, Display};
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",
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)
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}
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#[test]
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fn merge_pub_in_path_crate() {
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check_assist(
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merge_imports,
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r"
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pub(in this::path) use std::fmt$0::Debug;
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pub(in this::path) use std::fmt::Display;
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",
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r"
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pub(in this::path) use std::fmt::{Debug, Display};
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",
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)
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}
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#[test]
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fn test_merge_nested() {
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check_assist(
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merge_imports,
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r"
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use std::{fmt$0::Debug, fmt::Display};
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",
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r"
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use std::{fmt::{Debug, Display}};
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",
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);
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}
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#[test]
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fn test_merge_nested2() {
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check_assist(
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merge_imports,
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r"
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use std::{fmt::Debug, fmt$0::Display};
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",
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r"
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use std::{fmt::{Display, Debug}};
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",
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);
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}
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#[test]
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fn test_merge_with_nested_self_item() {
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check_assist(
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merge_imports,
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r"
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use std$0::{fmt::{Write, Display}};
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use std::{fmt::{self, Debug}};
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",
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r"
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use std::{fmt::{Write, Display, self, Debug}};
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",
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);
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}
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#[test]
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fn test_merge_with_nested_self_item2() {
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check_assist(
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merge_imports,
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r"
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use std$0::{fmt::{self, Debug}};
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use std::{fmt::{Write, Display}};
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",
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r"
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use std::{fmt::{self, Debug, Write, Display}};
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",
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);
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}
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#[test]
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fn test_merge_self_with_nested_self_item() {
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check_assist(
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merge_imports,
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r"
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use std::{fmt$0::{self, Debug}, fmt::{Write, Display}};
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",
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r"
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use std::{fmt::{self, Debug, Write, Display}};
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",
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);
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}
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#[test]
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fn test_merge_nested_self_and_empty() {
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check_assist(
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merge_imports,
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r"
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use foo::$0{bar::{self}};
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use foo::{bar};
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",
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r"
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use foo::{bar::{self}};
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",
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)
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}
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#[test]
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fn test_merge_nested_empty_and_self() {
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check_assist(
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merge_imports,
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r"
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use foo::$0{bar};
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use foo::{bar::{self}};
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",
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r"
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use foo::{bar::{self}};
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",
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)
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}
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#[test]
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fn test_merge_nested_list_self_and_glob() {
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check_assist(
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merge_imports,
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r"
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use std$0::{fmt::*};
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use std::{fmt::{self, Display}};
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",
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r"use std::{fmt::{self, *, Display}};",
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)
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}
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#[test]
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fn test_merge_single_wildcard_diff_prefixes() {
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check_assist(
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merge_imports,
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r"
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use std$0::cell::*;
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use std::str;
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",
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r"
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use std::{cell::*, str};
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",
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)
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}
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#[test]
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fn test_merge_both_wildcard_diff_prefixes() {
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check_assist(
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merge_imports,
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r"
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use std$0::cell::*;
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use std::str::*;
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",
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r"
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use std::{cell::*, str::*};
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",
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)
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}
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#[test]
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fn removes_just_enough_whitespace() {
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check_assist(
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merge_imports,
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r"
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use foo$0::bar;
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use foo::baz;
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/// Doc comment
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",
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r"
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use foo::{bar, baz};
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/// Doc comment
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",
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);
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}
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#[test]
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fn works_with_trailing_comma() {
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check_assist(
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merge_imports,
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r"
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use {
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foo$0::bar,
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foo::baz,
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};
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",
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r"
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use {
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foo::{bar, baz},
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};
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",
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);
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check_assist(
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merge_imports,
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r"
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use {
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foo::baz,
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foo$0::bar,
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};
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",
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r"
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use {
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foo::{bar, baz},
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};
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",
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);
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}
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#[test]
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fn test_double_comma() {
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check_assist(
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merge_imports,
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r"
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use foo::bar::baz;
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use foo::$0{
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FooBar,
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};
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",
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r"
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use foo::{
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FooBar, bar::baz,
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};
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",
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)
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}
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#[test]
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fn test_empty_use() {
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check_assist_not_applicable(
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merge_imports,
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r"
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use std::$0
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fn main() {}",
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);
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}
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}
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