1 //! Semantic Tokens helpers
6 Range, SemanticToken, SemanticTokenModifier, SemanticTokenType, SemanticTokens,
10 macro_rules! define_semantic_token_types {
11 ($(($ident:ident, $string:literal)),*$(,)?) => {
12 $(pub(crate) const $ident: SemanticTokenType = SemanticTokenType::new($string);)*
14 pub(crate) const SUPPORTED_TYPES: &[SemanticTokenType] = &[
15 SemanticTokenType::COMMENT,
16 SemanticTokenType::KEYWORD,
17 SemanticTokenType::STRING,
18 SemanticTokenType::NUMBER,
19 SemanticTokenType::REGEXP,
20 SemanticTokenType::OPERATOR,
21 SemanticTokenType::NAMESPACE,
22 SemanticTokenType::TYPE,
23 SemanticTokenType::STRUCT,
24 SemanticTokenType::CLASS,
25 SemanticTokenType::INTERFACE,
26 SemanticTokenType::ENUM,
27 SemanticTokenType::ENUM_MEMBER,
28 SemanticTokenType::TYPE_PARAMETER,
29 SemanticTokenType::FUNCTION,
30 SemanticTokenType::METHOD,
31 SemanticTokenType::PROPERTY,
32 SemanticTokenType::MACRO,
33 SemanticTokenType::VARIABLE,
34 SemanticTokenType::PARAMETER,
40 define_semantic_token_types![
42 (ARITHMETIC, "arithmetic"),
43 (ATTRIBUTE, "attribute"),
48 (BUILTIN_TYPE, "builtinType"),
52 (COMPARISON, "comparison"),
53 (CONST_PARAMETER, "constParameter"),
55 (ESCAPE_SEQUENCE, "escapeSequence"),
56 (FORMAT_SPECIFIER, "formatSpecifier"),
59 (LIFETIME, "lifetime"),
61 (OPERATOR, "operator"),
62 (PARENTHESIS, "parenthesis"),
63 (PUNCTUATION, "punctuation"),
64 (SELF_KEYWORD, "selfKeyword"),
65 (SEMICOLON, "semicolon"),
66 (TYPE_ALIAS, "typeAlias"),
68 (UNRESOLVED_REFERENCE, "unresolvedReference"),
71 macro_rules! define_semantic_token_modifiers {
72 ($(($ident:ident, $string:literal)),*$(,)?) => {
73 $(pub(crate) const $ident: SemanticTokenModifier = SemanticTokenModifier::new($string);)*
75 pub(crate) const SUPPORTED_MODIFIERS: &[SemanticTokenModifier] = &[
76 SemanticTokenModifier::DOCUMENTATION,
77 SemanticTokenModifier::DECLARATION,
78 SemanticTokenModifier::DEFINITION,
79 SemanticTokenModifier::STATIC,
80 SemanticTokenModifier::ABSTRACT,
81 SemanticTokenModifier::DEPRECATED,
82 SemanticTokenModifier::READONLY,
88 define_semantic_token_modifiers![
89 (CONSTANT, "constant"),
90 (CONTROL_FLOW, "controlFlow"),
91 (INJECTED, "injected"),
93 (CONSUMING, "consuming"),
98 (ATTRIBUTE_MODIFIER, "attribute"),
99 (TRAIT_MODIFIER, "trait"),
100 (CALLABLE, "callable"),
101 (INTRA_DOC_LINK, "intraDocLink"),
105 pub(crate) struct ModifierSet(pub(crate) u32);
107 impl ops::BitOrAssign<SemanticTokenModifier> for ModifierSet {
108 fn bitor_assign(&mut self, rhs: SemanticTokenModifier) {
109 let idx = SUPPORTED_MODIFIERS.iter().position(|it| it == &rhs).unwrap();
114 /// Tokens are encoded relative to each other.
116 /// This is a direct port of <https://github.com/microsoft/vscode-languageserver-node/blob/f425af9de46a0187adb78ec8a46b9b2ce80c5412/server/src/sematicTokens.proposed.ts#L45>
117 pub(crate) struct SemanticTokensBuilder {
121 data: Vec<SemanticToken>,
124 impl SemanticTokensBuilder {
125 pub(crate) fn new(id: String) -> Self {
126 SemanticTokensBuilder { id, prev_line: 0, prev_char: 0, data: Default::default() }
129 /// Push a new token onto the builder
130 pub(crate) fn push(&mut self, range: Range, token_index: u32, modifier_bitset: u32) {
131 let mut push_line = range.start.line as u32;
132 let mut push_char = range.start.character as u32;
134 if !self.data.is_empty() {
135 push_line -= self.prev_line;
137 push_char -= self.prev_char;
141 // A token cannot be multiline
142 let token_len = range.end.character - range.start.character;
144 let token = SemanticToken {
145 delta_line: push_line,
146 delta_start: push_char,
147 length: token_len as u32,
148 token_type: token_index,
149 token_modifiers_bitset: modifier_bitset,
152 self.data.push(token);
154 self.prev_line = range.start.line as u32;
155 self.prev_char = range.start.character as u32;
158 pub(crate) fn build(self) -> SemanticTokens {
159 SemanticTokens { result_id: Some(self.id), data: self.data }
163 pub(crate) fn diff_tokens(old: &[SemanticToken], new: &[SemanticToken]) -> Vec<SemanticTokensEdit> {
164 let offset = new.iter().zip(old.iter()).take_while(|&(n, p)| n == p).count();
166 let (_, old) = old.split_at(offset);
167 let (_, new) = new.split_at(offset);
169 let offset_from_end =
170 new.iter().rev().zip(old.iter().rev()).take_while(|&(n, p)| n == p).count();
172 let (old, _) = old.split_at(old.len() - offset_from_end);
173 let (new, _) = new.split_at(new.len() - offset_from_end);
175 if old.is_empty() && new.is_empty() {
178 // The lsp data field is actually a byte-diff but we
179 // travel in tokens so `start` and `delete_count` are in multiples of the
180 // serialized size of `SemanticToken`.
181 vec![SemanticTokensEdit {
182 start: 5 * offset as u32,
183 delete_count: 5 * old.len() as u32,
184 data: Some(new.into()),
189 pub(crate) fn type_index(ty: SemanticTokenType) -> u32 {
190 SUPPORTED_TYPES.iter().position(|it| *it == ty).unwrap() as u32
197 fn from(t: (u32, u32, u32, u32, u32)) -> SemanticToken {
203 token_modifiers_bitset: t.4,
208 fn test_diff_insert_at_end() {
209 let before = [from((1, 2, 3, 4, 5)), from((6, 7, 8, 9, 10))];
210 let after = [from((1, 2, 3, 4, 5)), from((6, 7, 8, 9, 10)), from((11, 12, 13, 14, 15))];
212 let edits = diff_tokens(&before, &after);
218 data: Some(vec![from((11, 12, 13, 14, 15))])
224 fn test_diff_insert_at_beginning() {
225 let before = [from((1, 2, 3, 4, 5)), from((6, 7, 8, 9, 10))];
226 let after = [from((11, 12, 13, 14, 15)), from((1, 2, 3, 4, 5)), from((6, 7, 8, 9, 10))];
228 let edits = diff_tokens(&before, &after);
234 data: Some(vec![from((11, 12, 13, 14, 15))])
240 fn test_diff_insert_in_middle() {
241 let before = [from((1, 2, 3, 4, 5)), from((6, 7, 8, 9, 10))];
243 from((1, 2, 3, 4, 5)),
244 from((10, 20, 30, 40, 50)),
245 from((60, 70, 80, 90, 100)),
246 from((6, 7, 8, 9, 10)),
249 let edits = diff_tokens(&before, &after);
255 data: Some(vec![from((10, 20, 30, 40, 50)), from((60, 70, 80, 90, 100))])
261 fn test_diff_remove_from_end() {
262 let before = [from((1, 2, 3, 4, 5)), from((6, 7, 8, 9, 10)), from((11, 12, 13, 14, 15))];
263 let after = [from((1, 2, 3, 4, 5)), from((6, 7, 8, 9, 10))];
265 let edits = diff_tokens(&before, &after);
266 assert_eq!(edits[0], SemanticTokensEdit { start: 10, delete_count: 5, data: Some(vec![]) });
270 fn test_diff_remove_from_beginning() {
271 let before = [from((11, 12, 13, 14, 15)), from((1, 2, 3, 4, 5)), from((6, 7, 8, 9, 10))];
272 let after = [from((1, 2, 3, 4, 5)), from((6, 7, 8, 9, 10))];
274 let edits = diff_tokens(&before, &after);
275 assert_eq!(edits[0], SemanticTokensEdit { start: 0, delete_count: 5, data: Some(vec![]) });
279 fn test_diff_remove_from_middle() {
281 from((1, 2, 3, 4, 5)),
282 from((10, 20, 30, 40, 50)),
283 from((60, 70, 80, 90, 100)),
284 from((6, 7, 8, 9, 10)),
286 let after = [from((1, 2, 3, 4, 5)), from((6, 7, 8, 9, 10))];
288 let edits = diff_tokens(&before, &after);
289 assert_eq!(edits[0], SemanticTokensEdit { start: 5, delete_count: 10, data: Some(vec![]) });