From c92addf8218c586f1c0f5be60e26c1e6e254ee8e Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Mon, 4 Aug 2014 13:20:02 -0700
Subject: [PATCH] Revert "remove documentsByName"

This reverts commit 5d26599811f9c8432b3c782f90f264d9255cf49d.
---
 src/services/services.ts | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/services/services.ts b/src/services/services.ts
index 8217e81aff..57b8781d05 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -1221,6 +1221,7 @@ module ts {
         var program: Program;
         var typeChecker: TypeChecker;
         var useCaseSensitivefilenames = false;
+        var documentsByName: Map<SourceFile> = {};
         var documentRegistry = documentRegistry;
         var cancellationToken = new CancellationTokenObject(host.getCancellationToken());
         var activeCompletionSession: CompletionSession;         // The current active completion session, used to get the completion entry details
@@ -1231,8 +1232,7 @@ module ts {
         }
 
         function getSourceFile(filename: string): SourceFile {
-            Debug.assert(!!program, "'getSoruceFile(filename)' is called before 'program' is initialized, consider calling 'synchronizeHostData()' first");
-            return program.getSourceFile(filename);
+            return lookUp(documentsByName, filename);
         }
 
         function createCompilerHost(): CompilerHost {
@@ -1291,6 +1291,7 @@ module ts {
                     var filename = oldSourceFiles[i].filename;
                     if (!hostCache.contains(filename) || changesInCompilationSettingsAffectSyntax) {
                         documentRegistry.releaseDocument(filename, oldSettings);
+                        delete documentsByName[filename];
                     }
                 }
             }
@@ -1332,6 +1333,9 @@ module ts {
                 else {
                     sourceFile = documentRegistry.acquireDocument(filename, compilationSettings, scriptSnapshot, hostCache.getByteOrderMark(filename), version, isOpen, []);
                 }
+
+                // Remeber the new sourceFile
+                documentsByName[filename] = sourceFile;
             }
 
             // Now create a new compiler