From 4d67473d6ce55ad6361dae84b00283445f148f37 Mon Sep 17 00:00:00 2001
From: Dan Sinclair <dsinclair@chromium.org>
Date: Tue, 14 Mar 2017 15:12:09 -0400
Subject: Replace FX_POSITION in GFGAS_FontMgr with bool
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Change-Id: Iddd99312aee6447c05be5633eead023a004e65e1
Reviewed-on: https://pdfium-review.googlesource.com/3034
Reviewed-by: Nicolás Peña <npm@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>
---
 core/fxcrt/fx_system.h          |  2 --
 xfa/fgas/font/cfgas_fontmgr.cpp | 20 ++++++++++----------
 xfa/fgas/font/cfgas_fontmgr.h   |  4 ++--
 3 files changed, 12 insertions(+), 14 deletions(-)

diff --git a/core/fxcrt/fx_system.h b/core/fxcrt/fx_system.h
index 321a8e272e..94fc20050a 100644
--- a/core/fxcrt/fx_system.h
+++ b/core/fxcrt/fx_system.h
@@ -67,8 +67,6 @@
 extern "C" {
 #endif  // __cplusplus
 
-typedef void* FX_POSITION;  // Keep until fxcrt containers gone
-
 #define IsFloatZero(f) ((f) < 0.0001 && (f) > -0.0001)
 #define IsFloatBigger(fa, fb) ((fa) > (fb) && !IsFloatZero((fa) - (fb)))
 #define IsFloatSmaller(fa, fb) ((fa) < (fb) && !IsFloatZero((fa) - (fb)))
diff --git a/xfa/fgas/font/cfgas_fontmgr.cpp b/xfa/fgas/font/cfgas_fontmgr.cpp
index 0173a6a24c..1746a2427d 100644
--- a/xfa/fgas/font/cfgas_fontmgr.cpp
+++ b/xfa/fgas/font/cfgas_fontmgr.cpp
@@ -542,19 +542,18 @@ CFX_ByteString CFX_FontSourceEnum_File::GetNextFile() {
   return bsName;
 }
 
-FX_POSITION CFX_FontSourceEnum_File::GetStartPosition() {
+bool CFX_FontSourceEnum_File::HasStartPosition() {
   m_wsNext = GetNextFile().UTF8Decode();
-  if (m_wsNext.GetLength() == 0)
-    return (FX_POSITION)0;
-  return (FX_POSITION)-1;
+  return m_wsNext.GetLength() != 0;
 }
 
-CFX_RetainPtr<IFX_FileAccess> CFX_FontSourceEnum_File::GetNext(
-    FX_POSITION& pos) {
+CFX_RetainPtr<IFX_FileAccess> CFX_FontSourceEnum_File::GetNext() {
+  if (m_wsNext.GetLength() == 0)
+    return nullptr;
+
   CFX_RetainPtr<IFX_FileAccess> pAccess =
       IFX_FileAccess::CreateDefault(m_wsNext.AsStringC());
   m_wsNext = GetNextFile().UTF8Decode();
-  pos = m_wsNext.GetLength() != 0 ? pAccess.Get() : nullptr;
   return pAccess;
 }
 
@@ -600,9 +599,10 @@ bool CFGAS_FontMgr::EnumFontsFromFontMapper() {
 
 bool CFGAS_FontMgr::EnumFontsFromFiles() {
   CFX_GEModule::Get()->GetFontMgr()->InitFTLibrary();
-  FX_POSITION pos = m_pFontSource->GetStartPosition();
-  while (pos) {
-    CFX_RetainPtr<IFX_FileAccess> pFontSource = m_pFontSource->GetNext(pos);
+  if (!m_pFontSource->HasStartPosition())
+    return !m_InstalledFonts.empty();
+
+  while (CFX_RetainPtr<IFX_FileAccess> pFontSource = m_pFontSource->GetNext()) {
     CFX_RetainPtr<IFX_SeekableReadStream> pFontStream =
         pFontSource->CreateFileStream(FX_FILEMODE_ReadOnly);
     if (pFontStream)
diff --git a/xfa/fgas/font/cfgas_fontmgr.h b/xfa/fgas/font/cfgas_fontmgr.h
index 63a8d3b146..5918a23143 100644
--- a/xfa/fgas/font/cfgas_fontmgr.h
+++ b/xfa/fgas/font/cfgas_fontmgr.h
@@ -169,8 +169,8 @@ class CFX_FontSourceEnum_File {
   CFX_FontSourceEnum_File();
   ~CFX_FontSourceEnum_File();
 
-  FX_POSITION GetStartPosition();
-  CFX_RetainPtr<IFX_FileAccess> GetNext(FX_POSITION& pos);
+  bool HasStartPosition();
+  CFX_RetainPtr<IFX_FileAccess> GetNext();
 
  private:
   CFX_ByteString GetNextFile();
-- 
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