120 lines
4.0 KiB
Rust
120 lines
4.0 KiB
Rust
//! Semantic Tokens helpers
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use std::ops;
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use lsp_types::{Range, SemanticToken, SemanticTokenModifier, SemanticTokenType, SemanticTokens};
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pub(crate) const ATTRIBUTE: SemanticTokenType = SemanticTokenType::new("attribute");
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pub(crate) const BUILTIN_TYPE: SemanticTokenType = SemanticTokenType::new("builtinType");
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pub(crate) const ENUM_MEMBER: SemanticTokenType = SemanticTokenType::new("enumMember");
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pub(crate) const LIFETIME: SemanticTokenType = SemanticTokenType::new("lifetime");
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pub(crate) const TYPE_ALIAS: SemanticTokenType = SemanticTokenType::new("typeAlias");
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pub(crate) const UNION: SemanticTokenType = SemanticTokenType::new("union");
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pub(crate) const CONSTANT: SemanticTokenModifier = SemanticTokenModifier::new("constant");
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pub(crate) const CONTROL: SemanticTokenModifier = SemanticTokenModifier::new("control");
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pub(crate) const MUTABLE: SemanticTokenModifier = SemanticTokenModifier::new("mutable");
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pub(crate) const UNSAFE: SemanticTokenModifier = SemanticTokenModifier::new("unsafe");
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pub(crate) const SUPPORTED_TYPES: &[SemanticTokenType] = &[
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SemanticTokenType::COMMENT,
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SemanticTokenType::KEYWORD,
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SemanticTokenType::STRING,
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SemanticTokenType::NUMBER,
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SemanticTokenType::REGEXP,
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SemanticTokenType::OPERATOR,
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SemanticTokenType::NAMESPACE,
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SemanticTokenType::TYPE,
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SemanticTokenType::STRUCT,
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SemanticTokenType::CLASS,
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SemanticTokenType::INTERFACE,
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SemanticTokenType::ENUM,
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SemanticTokenType::TYPE_PARAMETER,
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SemanticTokenType::FUNCTION,
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SemanticTokenType::MEMBER,
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SemanticTokenType::PROPERTY,
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SemanticTokenType::MACRO,
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SemanticTokenType::VARIABLE,
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SemanticTokenType::PARAMETER,
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SemanticTokenType::LABEL,
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ATTRIBUTE,
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BUILTIN_TYPE,
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ENUM_MEMBER,
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LIFETIME,
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TYPE_ALIAS,
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UNION,
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];
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pub(crate) const SUPPORTED_MODIFIERS: &[SemanticTokenModifier] = &[
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SemanticTokenModifier::DOCUMENTATION,
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SemanticTokenModifier::DECLARATION,
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SemanticTokenModifier::DEFINITION,
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SemanticTokenModifier::STATIC,
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SemanticTokenModifier::ABSTRACT,
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SemanticTokenModifier::DEPRECATED,
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SemanticTokenModifier::READONLY,
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CONSTANT,
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MUTABLE,
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UNSAFE,
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CONTROL,
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];
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#[derive(Default)]
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pub(crate) struct ModifierSet(pub(crate) u32);
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impl ops::BitOrAssign<SemanticTokenModifier> for ModifierSet {
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fn bitor_assign(&mut self, rhs: SemanticTokenModifier) {
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let idx = SUPPORTED_MODIFIERS.iter().position(|it| it == &rhs).unwrap();
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self.0 |= 1 << idx;
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}
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}
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/// Tokens are encoded relative to each other.
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///
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/// This is a direct port of https://github.com/microsoft/vscode-languageserver-node/blob/f425af9de46a0187adb78ec8a46b9b2ce80c5412/server/src/sematicTokens.proposed.ts#L45
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#[derive(Default)]
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pub(crate) struct SemanticTokensBuilder {
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prev_line: u32,
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prev_char: u32,
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data: Vec<SemanticToken>,
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}
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impl SemanticTokensBuilder {
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/// Push a new token onto the builder
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pub fn push(&mut self, range: Range, token_index: u32, modifier_bitset: u32) {
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let mut push_line = range.start.line as u32;
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let mut push_char = range.start.character as u32;
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if !self.data.is_empty() {
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push_line -= self.prev_line;
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if push_line == 0 {
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push_char -= self.prev_char;
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}
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}
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// A token cannot be multiline
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let token_len = range.end.character - range.start.character;
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let token = SemanticToken {
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delta_line: push_line,
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delta_start: push_char,
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length: token_len as u32,
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token_type: token_index,
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token_modifiers_bitset: modifier_bitset,
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};
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self.data.push(token);
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self.prev_line = range.start.line as u32;
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self.prev_char = range.start.character as u32;
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}
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pub fn build(self) -> SemanticTokens {
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SemanticTokens { result_id: None, data: self.data }
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}
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}
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pub fn type_index(type_: SemanticTokenType) -> u32 {
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SUPPORTED_TYPES.iter().position(|it| *it == type_).unwrap() as u32
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}
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