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"),
39 (BUILTIN_TYPE, "builtinType"),
40 (ENUM_MEMBER, "enumMember"),
41 (LIFETIME, "lifetime"),
42 (TYPE_ALIAS, "typeAlias"),
44 (UNRESOLVED_REFERENCE, "unresolvedReference"),
45 (FORMAT_SPECIFIER, "formatSpecifier"),
48 macro_rules! define_semantic_token_modifiers {
49 ($(($ident:ident, $string:literal)),*$(,)?) => {
50 $(pub(crate) const $ident: SemanticTokenModifier = SemanticTokenModifier::new($string);)*
52 pub(crate) const SUPPORTED_MODIFIERS: &[SemanticTokenModifier] = &[
53 SemanticTokenModifier::DOCUMENTATION,
54 SemanticTokenModifier::DECLARATION,
55 SemanticTokenModifier::DEFINITION,
56 SemanticTokenModifier::STATIC,
57 SemanticTokenModifier::ABSTRACT,
58 SemanticTokenModifier::DEPRECATED,
59 SemanticTokenModifier::READONLY,
65 define_semantic_token_modifiers![
66 (CONSTANT, "constant"),
67 (CONTROL_FLOW, "controlFlow"),
73 pub(crate) struct ModifierSet(pub(crate) u32);
75 impl ops::BitOrAssign<SemanticTokenModifier> for ModifierSet {
76 fn bitor_assign(&mut self, rhs: SemanticTokenModifier) {
77 let idx = SUPPORTED_MODIFIERS.iter().position(|it| it == &rhs).unwrap();
82 /// Tokens are encoded relative to each other.
84 /// This is a direct port of https://github.com/microsoft/vscode-languageserver-node/blob/f425af9de46a0187adb78ec8a46b9b2ce80c5412/server/src/sematicTokens.proposed.ts#L45
86 pub(crate) struct SemanticTokensBuilder {
89 data: Vec<SemanticToken>,
92 impl SemanticTokensBuilder {
93 /// Push a new token onto the builder
94 pub fn push(&mut self, range: Range, token_index: u32, modifier_bitset: u32) {
95 let mut push_line = range.start.line as u32;
96 let mut push_char = range.start.character as u32;
98 if !self.data.is_empty() {
99 push_line -= self.prev_line;
101 push_char -= self.prev_char;
105 // A token cannot be multiline
106 let token_len = range.end.character - range.start.character;
108 let token = SemanticToken {
109 delta_line: push_line,
110 delta_start: push_char,
111 length: token_len as u32,
112 token_type: token_index,
113 token_modifiers_bitset: modifier_bitset,
116 self.data.push(token);
118 self.prev_line = range.start.line as u32;
119 self.prev_char = range.start.character as u32;
122 pub fn build(self) -> SemanticTokens {
123 SemanticTokens { result_id: None, data: self.data }
127 pub fn type_index(type_: SemanticTokenType) -> u32 {
128 SUPPORTED_TYPES.iter().position(|it| *it == type_).unwrap() as u32