From a3a795afdb9d8efd8e6603cce92103d610346b78 Mon Sep 17 00:00:00 2001
From: qhuang8 <qhuang8@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Fri, 27 Mar 2009 03:21:37 +0000
Subject: [PATCH] Apply GetBestLanguage() API in UEFI

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@7963 6f19259b-4bc3-4df7-8a09-765794883524
---
 .../Universal/BdsDxe/FrontPage.c              | 116 +++++++++++++-----
 1 file changed, 85 insertions(+), 31 deletions(-)

diff --git a/IntelFrameworkModulePkg/Universal/BdsDxe/FrontPage.c b/IntelFrameworkModulePkg/Universal/BdsDxe/FrontPage.c
index fb605d57d9..29974769bb 100644
--- a/IntelFrameworkModulePkg/Universal/BdsDxe/FrontPage.c
+++ b/IntelFrameworkModulePkg/Universal/BdsDxe/FrontPage.c
@@ -129,10 +129,12 @@ FrontPageCallback (
 {
   CHAR8                         *LanguageString;
   CHAR8                         *LangCode;
-  CHAR8                         Lang[RFC_3066_ENTRY_SIZE];
+  CHAR8                         *Lang;
   CHAR8                         OldLang[ISO_639_2_ENTRY_SIZE];
   UINTN                         Index;
   EFI_STATUS                    Status;
+  CHAR8                         *PlatformSupportedLanguages;
+  CHAR8                         *BestLanguage;
 
   if ((Value == NULL) || (ActionRequest == NULL)) {
     return EFI_INVALID_PARAMETER;
@@ -158,7 +160,12 @@ FrontPageCallback (
     //
     LanguageString = HiiLibGetSupportedLanguages (gFrontPagePrivate.HiiHandle);
     ASSERT (LanguageString != NULL);
-
+    //
+    // Allocate working buffer for RFC 4646 language in supported LanguageString.
+    //
+    Lang = AllocatePool (AsciiStrSize (LanguageString));
+    ASSERT (Lang != NULL);
+    
     Index = 0;
     LangCode = LanguageString;
     while (*LangCode != 0) {
@@ -171,30 +178,53 @@ FrontPageCallback (
       Index++;
     }
 
-    Status = gRT->SetVariable (
-                    L"PlatformLang",
-                    &gEfiGlobalVariableGuid,
-                    EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
-                    AsciiStrSize (Lang),
-                    Lang
-                    );
-
-    if (!FeaturePcdGet (PcdUefiVariableDefaultLangDeprecate)) {
-      //
-      // Set UEFI deprecated variable "Lang" for backwards compatibility
-      //
-      Status = ConvertRfc3066LanguageToIso639Language (Lang, OldLang);
-      if (!EFI_ERROR (Status)) {
-        Status = gRT->SetVariable (
-                        L"Lang",
-                        &gEfiGlobalVariableGuid,
-                        EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
-                        ISO_639_2_ENTRY_SIZE,
-                        OldLang
-                        );
+    PlatformSupportedLanguages = GetEfiGlobalVariable (L"PlatformLangCodes");
+    if (PlatformSupportedLanguages == NULL) {
+      PlatformSupportedLanguages = AllocateCopyPool (
+                                     AsciiStrSize ((CHAR8 *) PcdGetPtr (PcdUefiVariableDefaultPlatformLangCodes)),
+                                     (CHAR8 *) PcdGetPtr (PcdUefiVariableDefaultPlatformLangCodes)
+                                     );
+      ASSERT (PlatformSupportedLanguages != NULL);
+    }
+    
+    //
+    // Select the best language in platform supported Language.
+    //
+    BestLanguage = GetBestLanguage (
+                     PlatformSupportedLanguages,
+                     FALSE,
+                     Lang,
+                     NULL
+                     );
+    if (BestLanguage != NULL) {
+      Status = gRT->SetVariable (
+                      L"PlatformLang",
+                      &gEfiGlobalVariableGuid,
+                      EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
+                      AsciiStrSize (BestLanguage),
+                      Lang
+                      );
+
+      if (!FeaturePcdGet (PcdUefiVariableDefaultLangDeprecate)) {
+        //
+        // Set UEFI deprecated variable "Lang" for backwards compatibility
+        //
+        Status = ConvertRfc3066LanguageToIso639Language (BestLanguage, OldLang);
+        if (!EFI_ERROR (Status)) {
+          Status = gRT->SetVariable (
+                          L"Lang",
+                          &gEfiGlobalVariableGuid,
+                          EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
+                          ISO_639_2_ENTRY_SIZE,
+                          OldLang
+                          );
+        }
       }
+      FreePool (BestLanguage);
     }
-
+  
+    FreePool (PlatformSupportedLanguages);
+    FreePool (Lang);
     FreePool (LanguageString);
     break;
 
@@ -247,8 +277,9 @@ InitializeFrontPage (
   IFR_OPTION                  *OptionList;
   CHAR8                       *LanguageString;
   CHAR8                       *LangCode;
-  CHAR8                       Lang[RFC_3066_ENTRY_SIZE];
-  CHAR8                       CurrentLang[RFC_3066_ENTRY_SIZE];
+  CHAR8                       *Lang;
+  CHAR8                       *CurrentLang;
+  CHAR8                       *BestLanguage;
   UINTN                       OptionCount;
   EFI_STRING_ID               Token;
   CHAR16                      *StringBuffer;
@@ -329,10 +360,6 @@ InitializeFrontPage (
     }
   }
 
-  //
-  // Get current language setting
-  //
-  GetCurrentLanguage (CurrentLang);
 
   //
   // Allocate space for creation of UpdateData Buffer
@@ -350,6 +377,28 @@ InitializeFrontPage (
   HiiHandle = gFrontPagePrivate.HiiHandle;
   LanguageString = HiiLibGetSupportedLanguages (HiiHandle);
   ASSERT (LanguageString != NULL);
+  //
+  // Allocate working buffer for RFC 4646 language in supported LanguageString.
+  //
+  Lang = AllocatePool (AsciiStrSize (LanguageString));
+  ASSERT (Lang != NULL);
+
+  CurrentLang = GetEfiGlobalVariable (L"PlatformLang");
+  //
+  // Select the best language in LanguageString as the default one.
+  //
+  BestLanguage = GetBestLanguage (
+                   LanguageString,
+                   FALSE,
+                   (CurrentLang != NULL) ? CurrentLang : "",
+                   (CHAR8 *) PcdGetPtr (PcdUefiVariableDefaultPlatformLang),
+                   LanguageString,
+                   NULL
+                   );
+  //
+  // BestLanguage must be selected as it is the first language in LanguageString by default
+  //
+  ASSERT (BestLanguage != NULL);
 
   OptionCount = 0;
   LangCode = LanguageString;
@@ -394,7 +443,7 @@ InitializeFrontPage (
       Token = gFrontPagePrivate.LanguageToken[OptionCount];
     }
 
-    if (AsciiStrCmp (Lang, CurrentLang) == 0) {
+    if (AsciiStrCmp (Lang, BestLanguage) == 0) {
       OptionList[OptionCount].Flags = EFI_IFR_OPTION_DEFAULT;
     } else {
       OptionList[OptionCount].Flags = 0;
@@ -405,6 +454,11 @@ InitializeFrontPage (
     OptionCount++;
   }
 
+  if (CurrentLang != NULL) {
+    FreePool (CurrentLang);
+  }
+  FreePool (BestLanguage);
+  FreePool (Lang);
   FreePool (LanguageString);
 
   UpdateData.Offset = 0;
-- 
2.39.2