1 //! Semantic Tokens helpers
5 use lsp_types::{Range, SemanticToken, SemanticTokenModifier, SemanticTokenType, SemanticTokens};
7 macro_rules! define_semantic_token_types {
8 ($(($ident:ident, $string:literal)),*$(,)?) => {
9 $(pub(crate) const $ident: SemanticTokenType = SemanticTokenType::new($string);)*
11 pub(crate) const SUPPORTED_TYPES: &[SemanticTokenType] = &[
12 SemanticTokenType::COMMENT,
13 SemanticTokenType::KEYWORD,
14 SemanticTokenType::STRING,
15 SemanticTokenType::NUMBER,
16 SemanticTokenType::REGEXP,
17 SemanticTokenType::OPERATOR,
18 SemanticTokenType::NAMESPACE,
19 SemanticTokenType::TYPE,
20 SemanticTokenType::STRUCT,
21 SemanticTokenType::CLASS,
22 SemanticTokenType::INTERFACE,
23 SemanticTokenType::ENUM,
24 SemanticTokenType::TYPE_PARAMETER,
25 SemanticTokenType::FUNCTION,
26 SemanticTokenType::MEMBER,
27 SemanticTokenType::PROPERTY,
28 SemanticTokenType::MACRO,
29 SemanticTokenType::VARIABLE,
30 SemanticTokenType::PARAMETER,
31 SemanticTokenType::LABEL,
37 define_semantic_token_types![
38 (ATTRIBUTE, "attribute"),
40 (BUILTIN_TYPE, "builtinType"),
41 (ENUM_MEMBER, "enumMember"),
42 (ESCAPE_SEQUENCE, "escapeSequence"),
43 (FORMAT_SPECIFIER, "formatSpecifier"),
45 (LIFETIME, "lifetime"),
46 (SELF_KEYWORD, "selfKeyword"),
47 (TYPE_ALIAS, "typeAlias"),
49 (UNRESOLVED_REFERENCE, "unresolvedReference"),
52 macro_rules! define_semantic_token_modifiers {
53 ($(($ident:ident, $string:literal)),*$(,)?) => {
54 $(pub(crate) const $ident: SemanticTokenModifier = SemanticTokenModifier::new($string);)*
56 pub(crate) const SUPPORTED_MODIFIERS: &[SemanticTokenModifier] = &[
57 SemanticTokenModifier::DOCUMENTATION,
58 SemanticTokenModifier::DECLARATION,
59 SemanticTokenModifier::DEFINITION,
60 SemanticTokenModifier::STATIC,
61 SemanticTokenModifier::ABSTRACT,
62 SemanticTokenModifier::DEPRECATED,
63 SemanticTokenModifier::READONLY,
69 define_semantic_token_modifiers![
70 (CONSTANT, "constant"),
71 (CONTROL_FLOW, "controlFlow"),
72 (INJECTED, "injected"),
75 (ATTRIBUTE_MODIFIER, "attribute"),
79 pub(crate) struct ModifierSet(pub(crate) u32);
81 impl ops::BitOrAssign<SemanticTokenModifier> for ModifierSet {
82 fn bitor_assign(&mut self, rhs: SemanticTokenModifier) {
83 let idx = SUPPORTED_MODIFIERS.iter().position(|it| it == &rhs).unwrap();
88 /// Tokens are encoded relative to each other.
90 /// This is a direct port of https://github.com/microsoft/vscode-languageserver-node/blob/f425af9de46a0187adb78ec8a46b9b2ce80c5412/server/src/sematicTokens.proposed.ts#L45
92 pub(crate) struct SemanticTokensBuilder {
95 data: Vec<SemanticToken>,
98 impl SemanticTokensBuilder {
99 /// Push a new token onto the builder
100 pub fn push(&mut self, range: Range, token_index: u32, modifier_bitset: u32) {
101 let mut push_line = range.start.line as u32;
102 let mut push_char = range.start.character as u32;
104 if !self.data.is_empty() {
105 push_line -= self.prev_line;
107 push_char -= self.prev_char;
111 // A token cannot be multiline
112 let token_len = range.end.character - range.start.character;
114 let token = SemanticToken {
115 delta_line: push_line,
116 delta_start: push_char,
117 length: token_len as u32,
118 token_type: token_index,
119 token_modifiers_bitset: modifier_bitset,
122 self.data.push(token);
124 self.prev_line = range.start.line as u32;
125 self.prev_char = range.start.character as u32;
128 pub fn build(self) -> SemanticTokens {
129 SemanticTokens { result_id: None, data: self.data }
133 pub fn type_index(type_: SemanticTokenType) -> u32 {
134 SUPPORTED_TYPES.iter().position(|it| *it == type_).unwrap() as u32