Surfacing method to get Completion Symbol instead of details for better extensibility

Author: Sam El-Husseini

src/services/completions.ts

@@ -735,6 +735,26 @@ namespace ts.Completions {
 
         return undefined;
     }
+        
+    export function getCompletionEntrySymbol(typeChecker: TypeChecker, log: (message: string) => void, compilerOptions: CompilerOptions, sourceFile: SourceFile, position: number, entryName: string): Symbol {
+        // Compute all the completion symbols again.
+        const completionData = getCompletionData(typeChecker, log, sourceFile, position);
+        if (completionData) {
+            const { symbols, location } = completionData;
+
+            // Find the symbol with the matching entry name.
+            // We don't need to perform character checks here because we're only comparing the
+            // name against 'entryName' (which is known to be good), not building a new
+            // completion entry.
+            const symbol = forEach(symbols, s => getCompletionEntryDisplayNameForSymbol(typeChecker, s, compilerOptions.target, /*performCharacterChecks*/ false, location) === entryName ? s : undefined);
+
+            if (symbol) {
+                return symbol;
+            }
+        }
+
+        return undefined;
+    }
 
     function getCompletionData(typeChecker: TypeChecker, log: (message: string) => void, sourceFile: SourceFile, position: number) {
         const isJavaScriptFile = isSourceFileJavaScript(sourceFile);

src/services/services.ts

@@ -1351,6 +1351,11 @@ namespace ts {
             return Completions.getCompletionEntryDetails(program.getTypeChecker(), log, program.getCompilerOptions(), getValidSourceFile(fileName), position, entryName);
         }
 
+        function getCompletionEntrySymbol(fileName: string, position: number, entryName: string): Symbol {
+            synchronizeHostData();
+            return Completions.getCompletionEntrySymbol(program.getTypeChecker(), log, program.getCompilerOptions(), getValidSourceFile(fileName), position, entryName);
+        }
+
         function getQuickInfoAtPosition(fileName: string, position: number): QuickInfo {
             synchronizeHostData();
 

src/services/types.ts

@@ -194,6 +194,7 @@ namespace ts {
 
         getCompletionsAtPosition(fileName: string, position: number): CompletionInfo;
         getCompletionEntryDetails(fileName: string, position: number, entryName: string): CompletionEntryDetails;
+        getCompletionEntrySymbol(fileName: string, position: number, entryName: string): Symbol;
 
         getQuickInfoAtPosition(fileName: string, position: number): QuickInfo;