Prepare for omittiong parts of completion data that need to be resolved

crates/ide-completion/src/config.rs

@@ -7,7 +7,7 @@
 use hir::ImportPathConfig;
 use ide_db::{imports::insert_use::InsertUseConfig, SnippetCap};
 
-use crate::snippet::Snippet;
+use crate::{snippet::Snippet, CompletionFieldsToResolve};
 
 #[derive(Clone, Debug, PartialEq, Eq)]
 pub struct CompletionConfig {
@@ -27,6 +27,7 @@ pub struct CompletionConfig {
     pub prefer_absolute: bool,
     pub snippets: Vec<Snippet>,
     pub limit: Option<usize>,
+    pub fields_to_resolve: CompletionFieldsToResolve,
 }
 
 #[derive(Clone, Debug, PartialEq, Eq)]

crates/ide-completion/src/lib.rs

@@ -37,6 +37,35 @@ pub use crate::{
     snippet::{Snippet, SnippetScope},
 };
 
+#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+pub struct CompletionFieldsToResolve {
+    pub resolve_label_details: bool,
+    pub resolve_tags: bool,
+    pub resolve_detail: bool,
+    pub resolve_documentation: bool,
+    pub resolve_sort_text: bool,
+    pub resolve_filter_text: bool,
+    pub resolve_text_edit: bool,
+    // FIXME: those are always resolved
+    // pub resolve_additional_text_edits: bool,
+    pub resolve_command: bool,
+}
+
+impl CompletionFieldsToResolve {
+    pub const fn empty() -> Self {
+        Self {
+            resolve_label_details: false,
+            resolve_tags: false,
+            resolve_detail: false,
+            resolve_documentation: false,
+            resolve_sort_text: false,
+            resolve_filter_text: false,
+            resolve_text_edit: false,
+            resolve_command: false,
+        }
+    }
+}
+
 //FIXME: split the following feature into fine-grained features.
 
 // Feature: Magic Completions

crates/ide-completion/src/tests.rs

@@ -37,8 +37,8 @@ use test_fixture::ChangeFixture;
 use test_utils::assert_eq_text;
 
 use crate::{
-    resolve_completion_edits, CallableSnippets, CompletionConfig, CompletionItem,
-    CompletionItemKind,
+    resolve_completion_edits, CallableSnippets, CompletionConfig, CompletionFieldsToResolve,
+    CompletionItem, CompletionItemKind,
 };
 
 /// Lots of basic item definitions
@@ -84,6 +84,7 @@ pub(crate) const TEST_CONFIG: CompletionConfig = CompletionConfig {
     prefer_absolute: false,
     snippets: Vec::new(),
     limit: None,
+    fields_to_resolve: CompletionFieldsToResolve::empty(),
 };
 
 pub(crate) fn completion_list(ra_fixture: &str) -> String {

crates/ide/src/lib.rs

@@ -119,8 +119,8 @@ pub use ide_assists::{
     Assist, AssistConfig, AssistId, AssistKind, AssistResolveStrategy, SingleResolve,
 };
 pub use ide_completion::{
-    CallableSnippets, CompletionConfig, CompletionItem, CompletionItemKind, CompletionRelevance,
-    Snippet, SnippetScope,
+    CallableSnippets, CompletionConfig, CompletionFieldsToResolve, CompletionItem,
+    CompletionItemKind, CompletionRelevance, Snippet, SnippetScope,
 };
 pub use ide_db::{
     base_db::{Cancelled, CrateGraph, CrateId, FileChange, SourceRoot, SourceRootId},

crates/rust-analyzer/src/config.rs

@@ -12,10 +12,10 @@ use std::{
 use cfg::{CfgAtom, CfgDiff};
 use hir::Symbol;
 use ide::{
-    AssistConfig, CallableSnippets, CompletionConfig, DiagnosticsConfig, ExprFillDefaultMode,
-    GenericParameterHints, HighlightConfig, HighlightRelatedConfig, HoverConfig, HoverDocFormat,
-    InlayFieldsToResolve, InlayHintsConfig, JoinLinesConfig, MemoryLayoutHoverConfig,
-    MemoryLayoutHoverRenderKind, Snippet, SnippetScope, SourceRootId,
+    AssistConfig, CallableSnippets, CompletionConfig, CompletionFieldsToResolve, DiagnosticsConfig,
+    ExprFillDefaultMode, GenericParameterHints, HighlightConfig, HighlightRelatedConfig,
+    HoverConfig, HoverDocFormat, InlayFieldsToResolve, InlayHintsConfig, JoinLinesConfig,
+    MemoryLayoutHoverConfig, MemoryLayoutHoverRenderKind, Snippet, SnippetScope, SourceRootId,
 };
 use ide_db::{
     imports::insert_use::{ImportGranularity, InsertUseConfig, PrefixKind},
@@ -1391,6 +1391,7 @@ impl Config {
     }
 
     pub fn completion(&self, source_root: Option<SourceRootId>) -> CompletionConfig {
+        let client_capability_fields = self.completion_resolve_support_properties();
         CompletionConfig {
             enable_postfix_completions: self.completion_postfix_enable(source_root).to_owned(),
             enable_imports_on_the_fly: self.completion_autoimport_enable(source_root).to_owned()
@@ -1415,6 +1416,16 @@ impl Config {
             limit: self.completion_limit(source_root).to_owned(),
             enable_term_search: self.completion_termSearch_enable(source_root).to_owned(),
             term_search_fuel: self.completion_termSearch_fuel(source_root).to_owned() as u64,
+            fields_to_resolve: CompletionFieldsToResolve {
+                resolve_label_details: client_capability_fields.contains("labelDetails"),
+                resolve_tags: client_capability_fields.contains("tags"),
+                resolve_detail: client_capability_fields.contains("detail"),
+                resolve_documentation: client_capability_fields.contains("documentation"),
+                resolve_sort_text: client_capability_fields.contains("sortText"),
+                resolve_filter_text: client_capability_fields.contains("filterText"),
+                resolve_text_edit: client_capability_fields.contains("textEdit"),
+                resolve_command: client_capability_fields.contains("command"),
+            },
         }
     }
 

crates/rust-analyzer/src/handlers/request.rs

@@ -1019,9 +1019,11 @@ pub(crate) fn handle_completion(
 
     let items = to_proto::completion_items(
         &snap.config,
+        &completion_config.fields_to_resolve,
         &line_index,
         snap.file_version(position.file_id),
         text_document_position,
+        completion_trigger_character,
         items,
     );
 

crates/rust-analyzer/src/integrated_benchmarks.rs

@@ -12,7 +12,8 @@
 
 use hir::ChangeWithProcMacros;
 use ide::{
-    AnalysisHost, CallableSnippets, CompletionConfig, DiagnosticsConfig, FilePosition, TextSize,
+    AnalysisHost, CallableSnippets, CompletionConfig, CompletionFieldsToResolve, DiagnosticsConfig,
+    FilePosition, TextSize,
 };
 use ide_db::{
     imports::insert_use::{ImportGranularity, InsertUseConfig},
@@ -168,6 +169,7 @@ fn integrated_completion_benchmark() {
             snippets: Vec::new(),
             limit: None,
             add_semicolon_to_unit: true,
+            fields_to_resolve: CompletionFieldsToResolve::empty(),
         };
         let position =
             FilePosition { file_id, offset: TextSize::try_from(completion_offset).unwrap() };
@@ -215,6 +217,7 @@ fn integrated_completion_benchmark() {
             snippets: Vec::new(),
             limit: None,
             add_semicolon_to_unit: true,
+            fields_to_resolve: CompletionFieldsToResolve::empty(),
         };
         let position =
             FilePosition { file_id, offset: TextSize::try_from(completion_offset).unwrap() };
@@ -260,6 +263,7 @@ fn integrated_completion_benchmark() {
             snippets: Vec::new(),
             limit: None,
             add_semicolon_to_unit: true,
+            fields_to_resolve: CompletionFieldsToResolve::empty(),
         };
         let position =
             FilePosition { file_id, offset: TextSize::try_from(completion_offset).unwrap() };

crates/rust-analyzer/src/lsp/capabilities.rs

@@ -458,7 +458,21 @@ impl ClientCapabilities {
             .into_iter()
             .flatten()
             .cloned()
-            .collect::<FxHashSet<_>>()
+            .collect()
+    }
+
+    pub fn completion_resolve_support_properties(&self) -> FxHashSet<String> {
+        self.0
+            .text_document
+            .as_ref()
+            .and_then(|text| text.completion.as_ref())
+            .and_then(|completion_caps| completion_caps.completion_item.as_ref())
+            .and_then(|completion_item_caps| completion_item_caps.resolve_support.as_ref())
+            .map(|resolve_support| resolve_support.properties.iter())
+            .into_iter()
+            .flatten()
+            .cloned()
+            .collect()
     }
 
     pub fn hover_markdown_support(&self) -> bool {

crates/rust-analyzer/src/lsp/ext.rs

@@ -825,6 +825,7 @@ pub struct CompletionResolveData {
     pub position: lsp_types::TextDocumentPositionParams,
     pub imports: Vec<CompletionImport>,
     pub version: Option<i32>,
+    pub completion_trigger_character: Option<char>,
 }
 
 #[derive(Debug, Serialize, Deserialize)]

crates/rust-analyzer/src/lsp/to_proto.rs

@@ -6,9 +6,9 @@ use std::{
 };
 
 use ide::{
-    Annotation, AnnotationKind, Assist, AssistKind, Cancellable, CompletionItem,
-    CompletionItemKind, CompletionRelevance, Documentation, FileId, FileRange, FileSystemEdit,
-    Fold, FoldKind, Highlight, HlMod, HlOperator, HlPunct, HlRange, HlTag, Indel,
+    Annotation, AnnotationKind, Assist, AssistKind, Cancellable, CompletionFieldsToResolve,
+    CompletionItem, CompletionItemKind, CompletionRelevance, Documentation, FileId, FileRange,
+    FileSystemEdit, Fold, FoldKind, Highlight, HlMod, HlOperator, HlPunct, HlRange, HlTag, Indel,
     InlayFieldsToResolve, InlayHint, InlayHintLabel, InlayHintLabelPart, InlayKind, Markup,
     NavigationTarget, ReferenceCategory, RenameError, Runnable, Severity, SignatureHelp,
     SnippetEdit, SourceChange, StructureNodeKind, SymbolKind, TextEdit, TextRange, TextSize,
@@ -227,9 +227,11 @@ pub(crate) fn snippet_text_edit_vec(
 
 pub(crate) fn completion_items(
     config: &Config,
+    fields_to_resolve: &CompletionFieldsToResolve,
     line_index: &LineIndex,
     version: Option<i32>,
     tdpp: lsp_types::TextDocumentPositionParams,
+    completion_trigger_character: Option<char>,
     mut items: Vec<CompletionItem>,
 ) -> Vec<lsp_types::CompletionItem> {
     if config.completion_hide_deprecated() {
@@ -239,7 +241,17 @@ pub(crate) fn completion_items(
     let max_relevance = items.iter().map(|it| it.relevance.score()).max().unwrap_or_default();
     let mut res = Vec::with_capacity(items.len());
     for item in items {
-        completion_item(&mut res, config, line_index, version, &tdpp, max_relevance, item);
+        completion_item(
+            &mut res,
+            config,
+            fields_to_resolve,
+            line_index,
+            version,
+            &tdpp,
+            max_relevance,
+            completion_trigger_character,
+            item,
+        );
     }
 
     if let Some(limit) = config.completion(None).limit {
@@ -253,10 +265,12 @@ pub(crate) fn completion_items(
 fn completion_item(
     acc: &mut Vec<lsp_types::CompletionItem>,
     config: &Config,
+    fields_to_resolve: &CompletionFieldsToResolve,
     line_index: &LineIndex,
     version: Option<i32>,
     tdpp: &lsp_types::TextDocumentPositionParams,
     max_relevance: u32,
+    completion_trigger_character: Option<char>,
     item: CompletionItem,
 ) {
     let insert_replace_support = config.insert_replace_support().then_some(tdpp.position);
@@ -264,6 +278,7 @@ fn completion_item(
     let lookup = item.lookup().to_owned();
 
     let mut additional_text_edits = Vec::new();
+    let mut something_to_resolve = false;
 
     // LSP does not allow arbitrary edits in completion, so we have to do a
     // non-trivial mapping here.
@@ -337,7 +352,12 @@ fn completion_item(
             })
             .collect::<Vec<_>>();
         if !imports.is_empty() {
-            let data = lsp_ext::CompletionResolveData { position: tdpp.clone(), imports, version };
+            let data = lsp_ext::CompletionResolveData {
+                position: tdpp.clone(),
+                imports,
+                version,
+                completion_trigger_character,
+            };
             lsp_item.data = Some(to_value(data).unwrap());
         }
     }