Refactored exceededTotalSizeLimitForNonTsFiles to return the last filename analyzed if the service language is going to be disabled

src/server/editorServices.ts

@@ -1377,9 +1377,10 @@ namespace ts.server {
             return { projectOptions, configFileErrors: errors, configFileSpecs: parsedCommandLine.configFileSpecs };
         }
 
-        private exceededTotalSizeLimitForNonTsFiles<T>(name: string, options: CompilerOptions, fileNames: T[], propertyReader: FilePropertyReader<T>) {
+        /** Get a filename if the language service exceeds the maximum allowed program size; otherwise returns undefined. */
+        private getFilenameForExceededTotalSizeLimitForNonTsFiles<T>(name: string, options: CompilerOptions, fileNames: T[], propertyReader: FilePropertyReader<T>): string | undefined {
             if (options && options.disableSizeLimit || !this.host.getFileSize) {
-                return false;
+                return;
             }
 
             let availableSpace = maxProgramSizeForNonTsFiles;
@@ -1396,20 +1397,16 @@ namespace ts.server {
 
                 totalNonTsFileSize += this.host.getFileSize(fileName);
 
-                if (totalNonTsFileSize > maxProgramSizeForNonTsFiles) {
+                if (totalNonTsFileSize > maxProgramSizeForNonTsFiles || totalNonTsFileSize > availableSpace) {
                     this.logger.info(getExceedLimitMessage({ propertyReader, hasTypeScriptFileExtension, host: this.host }, totalNonTsFileSize));
                     // Keep the size as zero since it's disabled
-                    return true;
+                    return fileName;
                 }
             }
 
-            if (totalNonTsFileSize > availableSpace) {
-                this.logger.info(getExceedLimitMessage({ propertyReader, hasTypeScriptFileExtension, host: this.host }, totalNonTsFileSize));
-                return true;
-            }
-
             this.projectToSizeMap.set(name, totalNonTsFileSize);
-            return false;
+
+            return;
 
             function getExceedLimitMessage(context: { propertyReader: FilePropertyReader<any>, hasTypeScriptFileExtension: (filename: string) => boolean, host: ServerHost }, totalNonTsFileSize: number) {
                 const files = getTop5LargestFiles(context);
@@ -1432,7 +1429,7 @@ namespace ts.server {
                 this,
                 this.documentRegistry,
                 compilerOptions,
-                /*languageServiceEnabled*/ !this.exceededTotalSizeLimitForNonTsFiles(projectFileName, compilerOptions, files, externalFilePropertyReader),
+                /*exceededFilename*/ this.getFilenameForExceededTotalSizeLimitForNonTsFiles(projectFileName, compilerOptions, files, externalFilePropertyReader),
                 options.compileOnSave === undefined ? true : options.compileOnSave);
             project.excludedFiles = excludedFiles;
 
@@ -1498,14 +1495,14 @@ namespace ts.server {
             const cachedDirectoryStructureHost = createCachedDirectoryStructureHost(this.host, this.host.getCurrentDirectory(), this.host.useCaseSensitiveFileNames);
             const { projectOptions, configFileErrors, configFileSpecs } = this.convertConfigFileContentToProjectOptions(configFileName, cachedDirectoryStructureHost);
             this.logger.info(`Opened configuration file ${configFileName}`);
-            const languageServiceEnabled = !this.exceededTotalSizeLimitForNonTsFiles(configFileName, projectOptions.compilerOptions, projectOptions.files, fileNamePropertyReader);
+            const exceededFilename = this.getFilenameForExceededTotalSizeLimitForNonTsFiles(configFileName, projectOptions.compilerOptions, projectOptions.files, fileNamePropertyReader);
             const project = new ConfiguredProject(
                 configFileName,
                 this,
                 this.documentRegistry,
                 projectOptions.configHasFilesProperty,
                 projectOptions.compilerOptions,
-                languageServiceEnabled,
+                exceededFilename,
                 projectOptions.compileOnSave === undefined ? false : projectOptions.compileOnSave,
                 cachedDirectoryStructureHost);
 
@@ -1518,7 +1515,7 @@ namespace ts.server {
                 WatchType.ConfigFilePath,
                 project
             );
-            if (languageServiceEnabled) {
+            if (!exceededFilename) {
                 project.watchWildcards(projectOptions.wildcardDirectories);
             }
 
@@ -1631,8 +1628,9 @@ namespace ts.server {
             // Update the project
             project.configFileSpecs = configFileSpecs;
             project.setProjectErrors(configFileErrors);
-            if (this.exceededTotalSizeLimitForNonTsFiles(project.canonicalConfigFilePath, projectOptions.compilerOptions, projectOptions.files, fileNamePropertyReader)) {
-                project.disableLanguageService();
+            const exceededFilename = this.getFilenameForExceededTotalSizeLimitForNonTsFiles(project.canonicalConfigFilePath, projectOptions.compilerOptions, projectOptions.files, fileNamePropertyReader);
+            if (exceededFilename) {
+                project.disableLanguageService(exceededFilename);
                 project.stopWatchingWildCards();
             }
             else {
@@ -2396,8 +2394,9 @@ namespace ts.server {
                 externalProject.excludedFiles = excludedFiles;
                 if (!tsConfigFiles) {
                     const compilerOptions = convertCompilerOptions(proj.options);
-                    if (this.exceededTotalSizeLimitForNonTsFiles(proj.projectFileName, compilerOptions, proj.rootFiles, externalFilePropertyReader)) {
-                        externalProject.disableLanguageService();
+                    const exceededFilename = this.getFilenameForExceededTotalSizeLimitForNonTsFiles(proj.projectFileName, compilerOptions, proj.rootFiles, externalFilePropertyReader);
+                    if (exceededFilename) {
+                        externalProject.disableLanguageService(exceededFilename);
                     }
                     else {
                         externalProject.enableLanguageService();

src/server/project.ts

@@ -130,6 +130,7 @@ namespace ts.server {
         protected languageService: LanguageService;
 
         public languageServiceEnabled = true;
+        public exceededFilename: string | undefined;
 
         readonly trace?: (s: string) => void;
         readonly realpath?: (path: string) => string;
@@ -212,7 +213,7 @@ namespace ts.server {
             readonly projectService: ProjectService,
             private documentRegistry: DocumentRegistry,
             hasExplicitListOfFiles: boolean,
-            languageServiceEnabled: boolean,
+            exceededFilename: string | undefined,
             private compilerOptions: CompilerOptions,
             public compileOnSaveEnabled: boolean,
             directoryStructureHost: DirectoryStructureHost,
@@ -244,8 +245,8 @@ namespace ts.server {
             // Use the current directory as resolution root only if the project created using current directory string
             this.resolutionCache = createResolutionCache(this, currentDirectory && this.currentDirectory, /*logChangesWhenResolvingModule*/ true);
             this.languageService = createLanguageService(this, this.documentRegistry);
-            if (!languageServiceEnabled) {
-                this.disableLanguageService();
+            if (exceededFilename) {
+                this.disableLanguageService(exceededFilename);
             }
             this.markAsDirty();
         }
@@ -500,12 +501,13 @@ namespace ts.server {
             this.projectService.onUpdateLanguageServiceStateForProject(this, /*languageServiceEnabled*/ true);
         }
 
-        disableLanguageService() {
+        disableLanguageService(exceededFilename: string) {
             if (!this.languageServiceEnabled) {
                 return;
             }
             this.languageService.cleanupSemanticCache();
             this.languageServiceEnabled = false;
+            this.exceededFilename = exceededFilename;
             this.builderState = undefined;
             this.resolutionCache.closeTypeRootsWatch();
             this.projectService.onUpdateLanguageServiceStateForProject(this, /*languageServiceEnabled*/ false);
@@ -993,12 +995,12 @@ namespace ts.server {
         getChangesSinceVersion(lastKnownVersion?: number): ProjectFilesWithTSDiagnostics {
             this.updateGraph();
 
-            const info = {
+            const info: protocol.ProjectVersionInfo = {
                 projectName: this.getProjectName(),
                 version: this.projectStructureVersion,
                 isInferred: this.projectKind === ProjectKind.Inferred,
                 options: this.getCompilationSettings(),
-                languageServiceDisabled: !this.languageServiceEnabled
+                exceededFilename: this.exceededFilename
             };
             const updatedFileNames = this.updatedFileNames;
             this.updatedFileNames = undefined;
@@ -1182,7 +1184,7 @@ namespace ts.server {
                 projectService,
                 documentRegistry,
                 /*files*/ undefined,
-                /*languageServiceEnabled*/ true,
+                /*exceededFileName*/ undefined,
                 compilerOptions,
                 /*compileOnSaveEnabled*/ false,
                 projectService.host,
@@ -1261,7 +1263,7 @@ namespace ts.server {
             documentRegistry: DocumentRegistry,
             hasExplicitListOfFiles: boolean,
             compilerOptions: CompilerOptions,
-            languageServiceEnabled: boolean,
+            exceededFilename: string | undefined,
             public compileOnSaveEnabled: boolean,
             cachedDirectoryStructureHost: CachedDirectoryStructureHost) {
             super(configFileName,
@@ -1269,7 +1271,7 @@ namespace ts.server {
                 projectService,
                 documentRegistry,
                 hasExplicitListOfFiles,
-                languageServiceEnabled,
+                exceededFilename,
                 compilerOptions,
                 compileOnSaveEnabled,
                 cachedDirectoryStructureHost,
@@ -1456,7 +1458,7 @@ namespace ts.server {
             projectService: ProjectService,
             documentRegistry: DocumentRegistry,
             compilerOptions: CompilerOptions,
-            languageServiceEnabled: boolean,
+            exceededFilename: string | undefined,
             public compileOnSaveEnabled: boolean,
             projectFilePath?: string) {
             super(externalProjectName,
@@ -1464,7 +1466,7 @@ namespace ts.server {
                 projectService,
                 documentRegistry,
                 /*hasExplicitListOfFiles*/ true,
-                languageServiceEnabled,
+                exceededFilename,
                 compilerOptions,
                 compileOnSaveEnabled,
                 projectService.host,

src/server/protocol.ts

@@ -1106,9 +1106,9 @@ namespace ts.server.protocol {
         options: ts.CompilerOptions;
 
         /**
-         * true if project language service is disabled
+         * Filename of the last file analyzed before disabling the language service. undefined, if the language service is enabled.
          */
-        languageServiceDisabled: boolean;
+        exceededFilename: string | undefined;
     }
 
     /**