diff options
author | Aleksey Kladov <[email protected]> | 2019-01-03 12:08:32 +0000 |
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committer | Aleksey Kladov <[email protected]> | 2019-01-03 12:21:49 +0000 |
commit | a5935687cbc62e893753ec81a00655281b03feae (patch) | |
tree | f57f648b33797c8482735da800808f9709467ccf /crates/ra_editor/src/assists/add_impl.rs | |
parent | 5323e599964005bc58cf89c27201973bc1ff51dd (diff) |
split assists over several files
Diffstat (limited to 'crates/ra_editor/src/assists/add_impl.rs')
-rw-r--r-- | crates/ra_editor/src/assists/add_impl.rs | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/crates/ra_editor/src/assists/add_impl.rs b/crates/ra_editor/src/assists/add_impl.rs new file mode 100644 index 000000000..50e00688e --- /dev/null +++ b/crates/ra_editor/src/assists/add_impl.rs | |||
@@ -0,0 +1,78 @@ | |||
1 | use join_to_string::join; | ||
2 | use ra_text_edit::TextEditBuilder; | ||
3 | use ra_syntax::{ | ||
4 | ast::{self, AstNode, NameOwner, TypeParamsOwner}, | ||
5 | SourceFileNode, | ||
6 | TextUnit, | ||
7 | }; | ||
8 | |||
9 | use crate::{find_node_at_offset, assists::LocalEdit}; | ||
10 | |||
11 | pub fn add_impl<'a>( | ||
12 | file: &'a SourceFileNode, | ||
13 | offset: TextUnit, | ||
14 | ) -> Option<impl FnOnce() -> LocalEdit + 'a> { | ||
15 | let nominal = find_node_at_offset::<ast::NominalDef>(file.syntax(), offset)?; | ||
16 | let name = nominal.name()?; | ||
17 | |||
18 | Some(move || { | ||
19 | let type_params = nominal.type_param_list(); | ||
20 | let mut edit = TextEditBuilder::new(); | ||
21 | let start_offset = nominal.syntax().range().end(); | ||
22 | let mut buf = String::new(); | ||
23 | buf.push_str("\n\nimpl"); | ||
24 | if let Some(type_params) = type_params { | ||
25 | type_params.syntax().text().push_to(&mut buf); | ||
26 | } | ||
27 | buf.push_str(" "); | ||
28 | buf.push_str(name.text().as_str()); | ||
29 | if let Some(type_params) = type_params { | ||
30 | let lifetime_params = type_params | ||
31 | .lifetime_params() | ||
32 | .filter_map(|it| it.lifetime()) | ||
33 | .map(|it| it.text()); | ||
34 | let type_params = type_params | ||
35 | .type_params() | ||
36 | .filter_map(|it| it.name()) | ||
37 | .map(|it| it.text()); | ||
38 | join(lifetime_params.chain(type_params)) | ||
39 | .surround_with("<", ">") | ||
40 | .to_buf(&mut buf); | ||
41 | } | ||
42 | buf.push_str(" {\n"); | ||
43 | let offset = start_offset + TextUnit::of_str(&buf); | ||
44 | buf.push_str("\n}"); | ||
45 | edit.insert(start_offset, buf); | ||
46 | LocalEdit { | ||
47 | label: "add impl".to_string(), | ||
48 | edit: edit.finish(), | ||
49 | cursor_position: Some(offset), | ||
50 | } | ||
51 | }) | ||
52 | } | ||
53 | |||
54 | #[cfg(test)] | ||
55 | mod tests { | ||
56 | use super::*; | ||
57 | use crate::test_utils::check_action; | ||
58 | |||
59 | #[test] | ||
60 | fn test_add_impl() { | ||
61 | check_action( | ||
62 | "struct Foo {<|>}\n", | ||
63 | "struct Foo {}\n\nimpl Foo {\n<|>\n}\n", | ||
64 | |file, off| add_impl(file, off).map(|f| f()), | ||
65 | ); | ||
66 | check_action( | ||
67 | "struct Foo<T: Clone> {<|>}", | ||
68 | "struct Foo<T: Clone> {}\n\nimpl<T: Clone> Foo<T> {\n<|>\n}", | ||
69 | |file, off| add_impl(file, off).map(|f| f()), | ||
70 | ); | ||
71 | check_action( | ||
72 | "struct Foo<'a, T: Foo<'a>> {<|>}", | ||
73 | "struct Foo<'a, T: Foo<'a>> {}\n\nimpl<'a, T: Foo<'a>> Foo<'a, T> {\n<|>\n}", | ||
74 | |file, off| add_impl(file, off).map(|f| f()), | ||
75 | ); | ||
76 | } | ||
77 | |||
78 | } | ||