Merge pull request #32028 from microsoft/referencesPrototypeSourceFile

For editing experience, use source instead of .d.ts files from project references

src/services/services.ts

@@ -1149,10 +1149,10 @@ namespace ts {
             useCaseSensitiveFileNames: () => useCaseSensitiveFileNames,
             getCurrentDirectory: () => currentDirectory,
             getProgram,
-            fileExists: host.fileExists && (f => host.fileExists!(f)),
-            readFile: host.readFile && ((f, encoding) => host.readFile!(f, encoding)),
-            getDocumentPositionMapper: host.getDocumentPositionMapper && ((generatedFileName, sourceFileName) => host.getDocumentPositionMapper!(generatedFileName, sourceFileName)),
-            getSourceFileLike: host.getSourceFileLike && (f => host.getSourceFileLike!(f)),
+            fileExists: maybeBind(host, host.fileExists),
+            readFile: maybeBind(host, host.readFile),
+            getDocumentPositionMapper: maybeBind(host, host.getDocumentPositionMapper),
+            getSourceFileLike: maybeBind(host, host.getSourceFileLike),
             log
         });
 
@@ -1250,6 +1250,12 @@ namespace ts {
             if (host.resolveTypeReferenceDirectives) {
                 compilerHost.resolveTypeReferenceDirectives = (...args) => host.resolveTypeReferenceDirectives!(...args);
             }
+            if (host.setResolvedProjectReferenceCallbacks) {
+                compilerHost.setResolvedProjectReferenceCallbacks = callbacks => host.setResolvedProjectReferenceCallbacks!(callbacks);
+            }
+            if (host.useSourceOfProjectReferenceRedirect) {
+                compilerHost.useSourceOfProjectReferenceRedirect = () => host.useSourceOfProjectReferenceRedirect!();
+            }
 
             const documentRegistryBucketKey = documentRegistry.getKeyForCompilationSettings(newSettings);
             const options: CreateProgramOptions = {

src/services/sourcemaps.ts

@@ -70,6 +70,11 @@ namespace ts {
             if (!sourceFile) return undefined;
 
             const program = host.getProgram()!;
+            // If this is source file of project reference source (instead of redirect) there is no generated position
+            if (program.isSourceOfProjectReferenceRedirect(sourceFile.fileName)) {
+                return undefined;
+            }
+
             const options = program.getCompilerOptions();
             const outPath = options.outFile || options.out;
 

src/services/types.ts

@@ -234,6 +234,10 @@ namespace ts {
         getDocumentPositionMapper?(generatedFileName: string, sourceFileName?: string): DocumentPositionMapper | undefined;
         /* @internal */
         getSourceFileLike?(fileName: string): SourceFileLike | undefined;
+        /* @internal */
+        setResolvedProjectReferenceCallbacks?(callbacks: ResolvedProjectReferenceCallbacks): void;
+        /* @internal */
+        useSourceOfProjectReferenceRedirect?(): boolean;
     }
 
     /* @internal */