handle semantic token delta & range request

server/src/semanticTokens.ts

@@ -56,6 +56,16 @@ enum TokenTypes {
 
 export const tokenBuilders: Map<string, SemanticTokensBuilder> = new Map();
 
+export function getTokenBuilder(uri: string): SemanticTokensBuilder {
+    let builder = tokenBuilders.get(uri);
+    if (builder !== undefined) {
+        return builder;
+    }
+    builder = new SemanticTokensBuilder();
+    tokenBuilders.set(uri, builder);
+    return builder;
+}
+
 export function getTokenTypes(): string[] {
     tokenTypes = tokenTypes.filter((value, index, arr) => {
         return initParams.capabilities.textDocument.semanticTokens.tokenTypes.includes(value);
@@ -71,7 +81,7 @@ export function getTokenModifiers(): string[] {
 }
 
 export class SemanticListener extends CMakeListener {
-    private _data: number[] = [];
+    // private _data: number[] = [];
     private _builder: SemanticTokensBuilder;
     private _uri: URI;
 
@@ -87,7 +97,7 @@ export class SemanticListener extends CMakeListener {
     constructor(uri: URI) {
         super();
         this._uri = uri;
-        this._builder = this.getTokenBuilder(uri.toString());
+        this._builder = getTokenBuilder(uri.toString());
     }
 
     private isOperator(token: string): boolean {
@@ -107,17 +117,21 @@ export class SemanticListener extends CMakeListener {
         return result;
     }
 
-    private getTokenBuilder(uri: string): SemanticTokensBuilder {
-        let result = tokenBuilders.get(uri);
-        if (result !== undefined) {
-            return result;
-        }
-
-        result = new SemanticTokensBuilder();
-        tokenBuilders.set(uri, result);
-        return result;
+    public buildEdits() {
+        return this._builder.buildEdits();
     }
 
+    // private getTokenBuilder(uri: string): SemanticTokensBuilder {
+    //     let result = tokenBuilders.get(uri);
+    //     if (result !== undefined) {
+    //         return result;
+    //     }
+
+    //     result = new SemanticTokensBuilder();
+    //     tokenBuilders.set(uri, result);
+    //     return result;
+    // }
+
     private getCmdKeyWords(sigs: string[]): string[] {
         let result: string[] = [];
         sigs.forEach(sig => {

server/src/server.ts

@@ -1,7 +1,8 @@
 import {
-    createConnection, DidChangeConfigurationNotification, HoverParams, InitializeParams, InitializeResult,
-    LSPAny,
-    ProposedFeatures, SemanticTokensParams, SignatureHelpParams, TextDocuments, TextDocumentSyncKind
+    createConnection, DidChangeConfigurationNotification, DidChangeConfigurationParams,
+    HoverParams, InitializedParams, InitializeParams, InitializeResult, ProposedFeatures,
+    SemanticTokensDeltaParams, SemanticTokensParams, SemanticTokensRangeParams,
+    SignatureHelpParams, TextDocumentChangeEvent, TextDocuments, TextDocumentSyncKind
 } from 'vscode-languageserver/node';
 
 import {
@@ -17,17 +18,17 @@ import { exec } from 'child_process';
 import { existsSync } from 'fs';
 import { URI, Utils } from 'vscode-uri';
 import * as builtinCmds from './builtin-cmds.json';
+import { cmakeInfo } from './cmakeInfo';
+import CMakeErrorListener from './diagnostics';
 import { SymbolListener } from './docSymbols';
 import { FormatListener } from './format';
 import antlr4 from './parser/antlr4/index.js';
 import CMakeLexer from './parser/CMakeLexer.js';
 import CMakeParser from './parser/CMakeParser.js';
-import { getTokenModifiers, getTokenTypes, SemanticListener, tokenBuilders } from './semanticTokens';
+import { getTokenBuilder, getTokenModifiers, getTokenTypes, SemanticListener, tokenBuilders } from './semanticTokens';
+import { extSettings } from './settings';
 import { DefinationListener, incToBaseDir, refToDef, topScope } from './symbolTable/goToDefination';
 import { getFileContext } from './utils';
-import ExtensionSettings, { extSettings } from './settings';
-import { cmakeInfo } from './cmakeInfo';
-import CMakeErrorListener from './diagnostics';
 
 type Word = {
     text: string,
@@ -67,7 +68,9 @@ connection.onInitialize(async (params: InitializeParams) => {
                     tokenModifiers: getTokenModifiers()
                 },
                 range: false,
-                full: true
+                full: {
+                    delta: true
+                }
             }
         },
         serverInfo: {
@@ -79,7 +82,7 @@ connection.onInitialize(async (params: InitializeParams) => {
     return result;
 });
 
-connection.onInitialized(async () => {
+connection.onInitialized(async (params: InitializedParams) => {
     console.log("Initialized");
     connection.client.register(DidChangeConfigurationNotification.type, undefined);
     await extSettings.getSettings();
@@ -194,7 +197,7 @@ connection.onSignatureHelp((params: SignatureHelpParams) => {
             const word: string = getWordAtPosition(document, params.position).text;
             if (word.length === 0) {
                 if (line[params.position.character - 1] === ')') {
-                    resolve(null);   
+                    resolve(null);
                 }
             }
             const firstSig: string = params.context.activeSignatureHelp?.signatures[0].label;
@@ -330,6 +333,31 @@ connection.languages.semanticTokens.on(async (params: SemanticTokensParams) => {
     return semanticListener.getSemanticTokens();
 });
 
+connection.languages.semanticTokens.onDelta((params: SemanticTokensDeltaParams) => {
+    const document = documents.get(params.textDocument.uri);
+    if (document === undefined) {
+        return {
+            edits: []
+        };
+    }
+
+    const builder = getTokenBuilder(document.uri);
+    builder.previousResult(params.previousResultId);
+
+    const docuUri: URI = URI.parse(document.uri);
+    const tree = getFileContext(docuUri);
+    const semanticListener = new SemanticListener(docuUri);
+    antlr4.tree.ParseTreeWalker.DEFAULT.walk(semanticListener, tree);
+
+    return semanticListener.buildEdits();
+});
+
+connection.languages.semanticTokens.onRange((params: SemanticTokensRangeParams) => {
+    return {
+        data: []
+    };
+});
+
 /**
  * @param params This argument is null when configuration changed
  * 
@@ -346,13 +374,13 @@ connection.languages.semanticTokens.on(async (params: SemanticTokensParams) => {
  * https://github.com/microsoft/vscode/issues/54821
  * https://github.com/microsoft/vscode-languageserver-node/issues/380
  */
-connection.onDidChangeConfiguration(params => {
+connection.onDidChangeConfiguration((params: DidChangeConfigurationParams) => {
     extSettings.getSettings();
 });
 
 // The content of a text document has changed. This event is emitted
 // when the text document first opened or when its content has changed.
-documents.onDidChangeContent(change => {
+documents.onDidChangeContent((change: TextDocumentChangeEvent<TextDocument>) => {
     contentChanged = true;
 
     // const document = documents.get(change.document.uri);
@@ -372,7 +400,7 @@ documents.onDidChangeContent(change => {
     });
 });
 
-documents.onDidClose(event => {
+documents.onDidClose((event: TextDocumentChangeEvent<TextDocument>) => {
     tokenBuilders.delete(event.document.uri);
 });