diff --git a/crates/rust-analyzer/src/caps.rs b/crates/rust-analyzer/src/caps.rs index 37d6954484..92a743fd8e 100644 --- a/crates/rust-analyzer/src/caps.rs +++ b/crates/rust-analyzer/src/caps.rs @@ -76,7 +76,9 @@ pub fn server_capabilities(client_caps: &ClientCapabilities) -> ServerCapabiliti token_modifiers: semantic_tokens::SUPPORTED_MODIFIERS.to_vec(), }, - document_provider: Some(SemanticTokensDocumentProvider::Bool(true)), + document_provider: Some(SemanticTokensDocumentProvider::Edits { + edits: Some(true), + }), range_provider: Some(true), work_done_progress_options: Default::default(), } diff --git a/crates/rust-analyzer/src/document.rs b/crates/rust-analyzer/src/document.rs index 43219e6330..e882c9865c 100644 --- a/crates/rust-analyzer/src/document.rs +++ b/crates/rust-analyzer/src/document.rs @@ -1,9 +1,9 @@ //! In-memory document information. /// Information about a document that the Language Client -// knows about. -// Its lifetime is driven by the textDocument/didOpen and textDocument/didClose -// client notifications. +/// knows about. +/// Its lifetime is driven by the textDocument/didOpen and textDocument/didClose +/// client notifications. #[derive(Debug, Clone)] pub(crate) struct DocumentData { pub version: Option, diff --git a/crates/rust-analyzer/src/global_state.rs b/crates/rust-analyzer/src/global_state.rs index b2d65a6d18..0e592ac1be 100644 --- a/crates/rust-analyzer/src/global_state.rs +++ b/crates/rust-analyzer/src/global_state.rs @@ -7,8 +7,8 @@ use std::{sync::Arc, time::Instant}; use crossbeam_channel::{unbounded, Receiver, Sender}; use flycheck::FlycheckHandle; -use lsp_types::Url; -use parking_lot::RwLock; +use lsp_types::{SemanticTokens, Url}; +use parking_lot::{Mutex, RwLock}; use ra_db::{CrateId, VfsPath}; use ra_ide::{Analysis, AnalysisChange, AnalysisHost, FileId}; use ra_project_model::{CargoWorkspace, ProcMacroClient, ProjectWorkspace, Target}; @@ -71,6 +71,7 @@ pub(crate) struct GlobalState { pub(crate) analysis_host: AnalysisHost, pub(crate) diagnostics: DiagnosticCollection, pub(crate) mem_docs: FxHashMap, + pub(crate) semantic_tokens_cache: Arc>>, pub(crate) vfs: Arc)>>, pub(crate) status: Status, pub(crate) source_root_config: SourceRootConfig, @@ -86,6 +87,7 @@ pub(crate) struct GlobalStateSnapshot { pub(crate) check_fixes: CheckFixes, pub(crate) latest_requests: Arc>, mem_docs: FxHashMap, + pub semantic_tokens_cache: Arc>>, vfs: Arc)>>, pub(crate) workspaces: Arc>, } @@ -120,6 +122,7 @@ impl GlobalState { analysis_host, diagnostics: Default::default(), mem_docs: FxHashMap::default(), + semantic_tokens_cache: Arc::new(Default::default()), vfs: Arc::new(RwLock::new((vfs::Vfs::default(), FxHashMap::default()))), status: Status::default(), source_root_config: SourceRootConfig::default(), @@ -186,6 +189,7 @@ impl GlobalState { latest_requests: Arc::clone(&self.latest_requests), check_fixes: Arc::clone(&self.diagnostics.check_fixes), mem_docs: self.mem_docs.clone(), + semantic_tokens_cache: Arc::clone(&self.semantic_tokens_cache), } } diff --git a/crates/rust-analyzer/src/handlers.rs b/crates/rust-analyzer/src/handlers.rs index 82f6de5da4..067259e246 100644 --- a/crates/rust-analyzer/src/handlers.rs +++ b/crates/rust-analyzer/src/handlers.rs @@ -13,9 +13,10 @@ use lsp_types::{ CallHierarchyOutgoingCall, CallHierarchyOutgoingCallsParams, CallHierarchyPrepareParams, CodeActionKind, CodeLens, Command, CompletionItem, Diagnostic, DocumentFormattingParams, DocumentHighlight, DocumentSymbol, FoldingRange, FoldingRangeParams, HoverContents, Location, - Position, PrepareRenameResponse, Range, RenameParams, SemanticTokensParams, - SemanticTokensRangeParams, SemanticTokensRangeResult, SemanticTokensResult, SymbolInformation, - SymbolTag, TextDocumentIdentifier, Url, WorkspaceEdit, + Position, PrepareRenameResponse, Range, RenameParams, SemanticTokensEditResult, + SemanticTokensEditsParams, SemanticTokensParams, SemanticTokensRangeParams, + SemanticTokensRangeResult, SemanticTokensResult, SymbolInformation, SymbolTag, + TextDocumentIdentifier, Url, WorkspaceEdit, }; use ra_ide::{ FileId, FilePosition, FileRange, HoverAction, HoverGotoTypeData, NavigationTarget, Query, @@ -1179,6 +1180,40 @@ pub(crate) fn handle_semantic_tokens( let highlights = snap.analysis.highlight(file_id)?; let semantic_tokens = to_proto::semantic_tokens(&text, &line_index, highlights); + + // Unconditionally cache the tokens + snap.semantic_tokens_cache.lock().insert(params.text_document.uri, semantic_tokens.clone()); + + Ok(Some(semantic_tokens.into())) +} + +pub(crate) fn handle_semantic_tokens_edits( + snap: GlobalStateSnapshot, + params: SemanticTokensEditsParams, +) -> Result> { + let _p = profile("handle_semantic_tokens_edits"); + + let file_id = from_proto::file_id(&snap, ¶ms.text_document.uri)?; + let text = snap.analysis.file_text(file_id)?; + let line_index = snap.analysis.file_line_index(file_id)?; + + let highlights = snap.analysis.highlight(file_id)?; + + let semantic_tokens = to_proto::semantic_tokens(&text, &line_index, highlights); + + let mut cache = snap.semantic_tokens_cache.lock(); + let cached_tokens = cache.entry(params.text_document.uri).or_default(); + + if let Some(prev_id) = &cached_tokens.result_id { + if *prev_id == params.previous_result_id { + let edits = to_proto::semantic_token_edits(&cached_tokens, &semantic_tokens); + *cached_tokens = semantic_tokens; + return Ok(Some(edits.into())); + } + } + + *cached_tokens = semantic_tokens.clone(); + Ok(Some(semantic_tokens.into())) } diff --git a/crates/rust-analyzer/src/main_loop.rs b/crates/rust-analyzer/src/main_loop.rs index 51626fcd58..ceddb2b056 100644 --- a/crates/rust-analyzer/src/main_loop.rs +++ b/crates/rust-analyzer/src/main_loop.rs @@ -386,6 +386,9 @@ impl GlobalState { handlers::handle_call_hierarchy_outgoing, )? .on::(handlers::handle_semantic_tokens)? + .on::( + handlers::handle_semantic_tokens_edits, + )? .on::( handlers::handle_semantic_tokens_range, )? @@ -443,6 +446,8 @@ impl GlobalState { None => log::error!("orphan DidCloseTextDocument: {}", path), } + this.semantic_tokens_cache.lock().remove(¶ms.text_document.uri); + if let Some(path) = path.as_path() { this.loader.handle.invalidate(path.to_path_buf()); } diff --git a/crates/rust-analyzer/src/semantic_tokens.rs b/crates/rust-analyzer/src/semantic_tokens.rs index 576bd8adcc..afc38fb4e8 100644 --- a/crates/rust-analyzer/src/semantic_tokens.rs +++ b/crates/rust-analyzer/src/semantic_tokens.rs @@ -2,7 +2,10 @@ use std::ops; -use lsp_types::{Range, SemanticToken, SemanticTokenModifier, SemanticTokenType, SemanticTokens}; +use lsp_types::{ + Range, SemanticToken, SemanticTokenModifier, SemanticTokenType, SemanticTokens, + SemanticTokensEdit, +}; macro_rules! define_semantic_token_types { ($(($ident:ident, $string:literal)),*$(,)?) => { @@ -89,14 +92,18 @@ impl ops::BitOrAssign for ModifierSet { /// Tokens are encoded relative to each other. /// /// This is a direct port of https://github.com/microsoft/vscode-languageserver-node/blob/f425af9de46a0187adb78ec8a46b9b2ce80c5412/server/src/sematicTokens.proposed.ts#L45 -#[derive(Default)] pub(crate) struct SemanticTokensBuilder { + id: String, prev_line: u32, prev_char: u32, data: Vec, } impl SemanticTokensBuilder { + pub fn new(id: String) -> Self { + SemanticTokensBuilder { id, prev_line: 0, prev_char: 0, data: Default::default() } + } + /// Push a new token onto the builder pub fn push(&mut self, range: Range, token_index: u32, modifier_bitset: u32) { let mut push_line = range.start.line as u32; @@ -127,10 +134,136 @@ impl SemanticTokensBuilder { } pub fn build(self) -> SemanticTokens { - SemanticTokens { result_id: None, data: self.data } + SemanticTokens { result_id: Some(self.id), data: self.data } + } +} + +pub fn diff_tokens(old: &[SemanticToken], new: &[SemanticToken]) -> Vec { + let offset = new.iter().zip(old.iter()).take_while(|&(n, p)| n == p).count(); + + let (_, old) = old.split_at(offset); + let (_, new) = new.split_at(offset); + + let offset_from_end = + new.iter().rev().zip(old.iter().rev()).take_while(|&(n, p)| n == p).count(); + + let (old, _) = old.split_at(old.len() - offset_from_end); + let (new, _) = new.split_at(new.len() - offset_from_end); + + if old.is_empty() && new.is_empty() { + vec![] + } else { + // The lsp data field is actually a byte-diff but we + // travel in tokens so `start` and `delete_count` are in multiples of the + // serialized size of `SemanticToken`. + vec![SemanticTokensEdit { + start: 5 * offset as u32, + delete_count: 5 * old.len() as u32, + data: Some(new.into()), + }] } } pub fn type_index(type_: SemanticTokenType) -> u32 { SUPPORTED_TYPES.iter().position(|it| *it == type_).unwrap() as u32 } + +#[cfg(test)] +mod tests { + use super::*; + + fn from(t: (u32, u32, u32, u32, u32)) -> SemanticToken { + SemanticToken { + delta_line: t.0, + delta_start: t.1, + length: t.2, + token_type: t.3, + token_modifiers_bitset: t.4, + } + } + + #[test] + fn test_diff_insert_at_end() { + let before = [from((1, 2, 3, 4, 5)), from((6, 7, 8, 9, 10))]; + let after = [from((1, 2, 3, 4, 5)), from((6, 7, 8, 9, 10)), from((11, 12, 13, 14, 15))]; + + let edits = diff_tokens(&before, &after); + assert_eq!( + edits[0], + SemanticTokensEdit { + start: 10, + delete_count: 0, + data: Some(vec![from((11, 12, 13, 14, 15))]) + } + ); + } + + #[test] + fn test_diff_insert_at_beginning() { + let before = [from((1, 2, 3, 4, 5)), from((6, 7, 8, 9, 10))]; + let after = [from((11, 12, 13, 14, 15)), from((1, 2, 3, 4, 5)), from((6, 7, 8, 9, 10))]; + + let edits = diff_tokens(&before, &after); + assert_eq!( + edits[0], + SemanticTokensEdit { + start: 0, + delete_count: 0, + data: Some(vec![from((11, 12, 13, 14, 15))]) + } + ); + } + + #[test] + fn test_diff_insert_in_middle() { + let before = [from((1, 2, 3, 4, 5)), from((6, 7, 8, 9, 10))]; + let after = [ + from((1, 2, 3, 4, 5)), + from((10, 20, 30, 40, 50)), + from((60, 70, 80, 90, 100)), + from((6, 7, 8, 9, 10)), + ]; + + let edits = diff_tokens(&before, &after); + assert_eq!( + edits[0], + SemanticTokensEdit { + start: 5, + delete_count: 0, + data: Some(vec![from((10, 20, 30, 40, 50)), from((60, 70, 80, 90, 100))]) + } + ); + } + + #[test] + fn test_diff_remove_from_end() { + let before = [from((1, 2, 3, 4, 5)), from((6, 7, 8, 9, 10)), from((11, 12, 13, 14, 15))]; + let after = [from((1, 2, 3, 4, 5)), from((6, 7, 8, 9, 10))]; + + let edits = diff_tokens(&before, &after); + assert_eq!(edits[0], SemanticTokensEdit { start: 10, delete_count: 5, data: Some(vec![]) }); + } + + #[test] + fn test_diff_remove_from_beginning() { + let before = [from((11, 12, 13, 14, 15)), from((1, 2, 3, 4, 5)), from((6, 7, 8, 9, 10))]; + let after = [from((1, 2, 3, 4, 5)), from((6, 7, 8, 9, 10))]; + + let edits = diff_tokens(&before, &after); + assert_eq!(edits[0], SemanticTokensEdit { start: 0, delete_count: 5, data: Some(vec![]) }); + } + + #[test] + fn test_diff_remove_from_middle() { + let before = [ + from((1, 2, 3, 4, 5)), + from((10, 20, 30, 40, 50)), + from((60, 70, 80, 90, 100)), + from((6, 7, 8, 9, 10)), + ]; + let after = [from((1, 2, 3, 4, 5)), from((6, 7, 8, 9, 10))]; + + let edits = diff_tokens(&before, &after); + assert_eq!(edits[0], SemanticTokensEdit { start: 5, delete_count: 10, data: Some(vec![]) }); + } +} diff --git a/crates/rust-analyzer/src/to_proto.rs b/crates/rust-analyzer/src/to_proto.rs index fadcc5853b..5eba1f1555 100644 --- a/crates/rust-analyzer/src/to_proto.rs +++ b/crates/rust-analyzer/src/to_proto.rs @@ -1,5 +1,8 @@ //! Conversion of rust-analyzer specific types to lsp_types equivalents. -use std::path::{self, Path}; +use std::{ + path::{self, Path}, + sync::atomic::{AtomicU32, Ordering}, +}; use itertools::Itertools; use ra_db::{FileId, FileRange}; @@ -303,12 +306,15 @@ pub(crate) fn inlay_int(line_index: &LineIndex, inlay_hint: InlayHint) -> lsp_ex } } +static TOKEN_RESULT_COUNTER: AtomicU32 = AtomicU32::new(1); + pub(crate) fn semantic_tokens( text: &str, line_index: &LineIndex, highlights: Vec, ) -> lsp_types::SemanticTokens { - let mut builder = semantic_tokens::SemanticTokensBuilder::default(); + let id = TOKEN_RESULT_COUNTER.fetch_add(1, Ordering::SeqCst).to_string(); + let mut builder = semantic_tokens::SemanticTokensBuilder::new(id); for highlight_range in highlights { let (type_, mods) = semantic_token_type_and_modifiers(highlight_range.highlight); @@ -328,6 +334,15 @@ pub(crate) fn semantic_tokens( builder.build() } +pub(crate) fn semantic_token_edits( + previous: &lsp_types::SemanticTokens, + current: &lsp_types::SemanticTokens, +) -> lsp_types::SemanticTokensEdits { + let result_id = current.result_id.clone(); + let edits = semantic_tokens::diff_tokens(&previous.data, ¤t.data); + lsp_types::SemanticTokensEdits { result_id, edits } +} + fn semantic_token_type_and_modifiers( highlight: Highlight, ) -> (lsp_types::SemanticTokenType, semantic_tokens::ModifierSet) {