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-rw-r--r--crates/ra_editor/src/extend_selection.rs40
1 files changed, 36 insertions, 4 deletions
diff --git a/crates/ra_editor/src/extend_selection.rs b/crates/ra_editor/src/extend_selection.rs
index b00a457b9..5946824d8 100644
--- a/crates/ra_editor/src/extend_selection.rs
+++ b/crates/ra_editor/src/extend_selection.rs
@@ -16,12 +16,18 @@ pub(crate) fn extend(root: SyntaxNodeRef, range: TextRange) -> Option<TextRange>
16 if leaves.clone().all(|it| it.kind() == WHITESPACE) { 16 if leaves.clone().all(|it| it.kind() == WHITESPACE) {
17 return Some(extend_ws(root, leaves.next()?, offset)); 17 return Some(extend_ws(root, leaves.next()?, offset));
18 } 18 }
19 let leaf = match leaves { 19 let leaf_range = match leaves {
20 LeafAtOffset::None => return None, 20 LeafAtOffset::None => return None,
21 LeafAtOffset::Single(l) => l, 21 LeafAtOffset::Single(l) => {
22 LeafAtOffset::Between(l, r) => pick_best(l, r), 22 if l.kind() == COMMENT {
23 extend_single_word_in_comment(l, range).unwrap_or_else(||l.range())
24 } else {
25 l.range()
26 }
27 },
28 LeafAtOffset::Between(l, r) => pick_best(l, r).range(),
23 }; 29 };
24 return Some(leaf.range()); 30 return Some(leaf_range);
25 }; 31 };
26 let node = find_covering_node(root, range); 32 let node = find_covering_node(root, range);
27 if node.kind() == COMMENT && range == node.range() { 33 if node.kind() == COMMENT && range == node.range() {
@@ -36,6 +42,24 @@ pub(crate) fn extend(root: SyntaxNodeRef, range: TextRange) -> Option<TextRange>
36 } 42 }
37} 43}
38 44
45fn extend_single_word_in_comment(leaf: SyntaxNodeRef, range: TextRange) -> Option<TextRange> {
46 let text : &str = leaf.leaf_text().unwrap();
47 let cursor_position: u32 = (range.start() - leaf.range().start()).into();
48
49 let (before, after) = text.split_at(cursor_position as usize);
50 let start_idx = before.rfind(char::is_whitespace);
51 let end_idx = after.find(char::is_whitespace);
52
53 match (start_idx, end_idx) {
54 (Some(start), Some(end)) => {
55 let from : TextUnit = (start as u32 + 1).into();
56 let to : TextUnit = (cursor_position + (end as u32)).into();
57 Some(TextRange::from_to(from, to))
58 },
59 (_, _) => None
60 }
61}
62
39fn extend_ws(root: SyntaxNodeRef, ws: SyntaxNodeRef, offset: TextUnit) -> TextRange { 63fn extend_ws(root: SyntaxNodeRef, ws: SyntaxNodeRef, offset: TextUnit) -> TextRange {
40 let ws_text = ws.leaf_text().unwrap(); 64 let ws_text = ws.leaf_text().unwrap();
41 let suffix = TextRange::from_to(offset, ws.range().end()) - ws.range().start(); 65 let suffix = TextRange::from_to(offset, ws.range().end()) - ws.range().start();
@@ -176,4 +200,12 @@ fn main() { foo+<|>bar;}
176 &["'a", "<'a>"] 200 &["'a", "<'a>"]
177 ); 201 );
178 } 202 }
203
204 #[test]
205 fn test_extend_selection_select_first_word() {
206 do_check(
207 r#"// foo bar b<|>az quxx"#,
208 &["baz", "// foo bar baz quxx"]
209 );
210 }
179} 211}