From cb88fa33339ca04c89f340b457f4960d0d4185a2 Mon Sep 17 00:00:00 2001
From: Lei Zhang <thestig@chromium.org>
Date: Fri, 14 Sep 2018 22:38:30 +0000
Subject: Use fxcrt::MaybeOwned in CFGAS_GEFont.

Change-Id: Ie1f4763e37832475a60c55b26263405e0bbf09b3
Reviewed-on: https://pdfium-review.googlesource.com/42510
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
---
 xfa/fgas/font/cfgas_gefont.cpp | 18 +++++-------------
 xfa/fgas/font/cfgas_gefont.h   |  7 +++----
 2 files changed, 8 insertions(+), 17 deletions(-)

diff --git a/xfa/fgas/font/cfgas_gefont.cpp b/xfa/fgas/font/cfgas_gefont.cpp
index 1c3d88beab..6f33eb50fe 100644
--- a/xfa/fgas/font/cfgas_gefont.cpp
+++ b/xfa/fgas/font/cfgas_gefont.cpp
@@ -55,11 +55,7 @@ RetainPtr<CFGAS_GEFont> CFGAS_GEFont::LoadFont(
 
 CFGAS_GEFont::CFGAS_GEFont(CFGAS_FontMgr* pFontMgr) : m_pFontMgr(pFontMgr) {}
 
-CFGAS_GEFont::~CFGAS_GEFont() {
-  m_pFontEncoding.reset();  // Has an UnownedPtr to |m_pFont|.
-  if (!m_bExternalFont)
-    delete m_pFont;
-}
+CFGAS_GEFont::~CFGAS_GEFont() = default;
 
 #if _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_
 bool CFGAS_GEFont::LoadFontInternal(const wchar_t* pszFontFamily,
@@ -73,7 +69,7 @@ bool CFGAS_GEFont::LoadFontInternal(const wchar_t* pszFontFamily,
 
   int32_t iWeight =
       FontStyleIsBold(dwFontStyles) ? FXFONT_FW_BOLD : FXFONT_FW_NORMAL;
-  m_pFont = new CFX_Font;
+  m_pFont = pdfium::MakeUnique<CFX_Font>();
   if (FontStyleIsItalic(dwFontStyles) && FontStyleIsBold(dwFontStyles))
     csFontFamily += ",BoldItalic";
   else if (FontStyleIsBold(dwFontStyles))
@@ -83,9 +79,7 @@ bool CFGAS_GEFont::LoadFontInternal(const wchar_t* pszFontFamily,
 
   m_pFont->LoadSubst(csFontFamily, true, dwFontStyles, iWeight, 0, wCodePage,
                      false);
-  if (!m_pFont->GetFace())
-    return false;
-  return InitFont();
+  return m_pFont->GetFace() && InitFont();
 }
 #endif  // _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_
 
@@ -94,7 +88,6 @@ bool CFGAS_GEFont::LoadFontInternal(CFX_Font* pExternalFont) {
     return false;
 
   m_pFont = pExternalFont;
-  m_bExternalFont = true;
   return InitFont();
 }
 
@@ -102,8 +95,7 @@ bool CFGAS_GEFont::LoadFontInternal(std::unique_ptr<CFX_Font> pInternalFont) {
   if (m_pFont || !pInternalFont)
     return false;
 
-  m_pFont = pInternalFont.release();
-  m_bExternalFont = false;
+  m_pFont = std::move(pInternalFont);
   return InitFont();
 }
 
@@ -114,7 +106,7 @@ bool CFGAS_GEFont::InitFont() {
   if (m_pFontEncoding)
     return true;
 
-  m_pFontEncoding = FX_CreateFontEncodingEx(m_pFont, FXFM_ENCODING_NONE);
+  m_pFontEncoding = FX_CreateFontEncodingEx(m_pFont.Get(), FXFM_ENCODING_NONE);
   return !!m_pFontEncoding;
 }
 
diff --git a/xfa/fgas/font/cfgas_gefont.h b/xfa/fgas/font/cfgas_gefont.h
index 407a232595..08164f7d5f 100644
--- a/xfa/fgas/font/cfgas_gefont.h
+++ b/xfa/fgas/font/cfgas_gefont.h
@@ -13,8 +13,8 @@
 #include <vector>
 
 #include "core/fxcrt/fx_memory.h"
+#include "core/fxcrt/maybe_owned.h"
 #include "core/fxcrt/retain_ptr.h"
-#include "core/fxcrt/unowned_ptr.h"
 #include "xfa/fgas/font/cfgas_fontmgr.h"
 #include "xfa/fgas/font/cfgas_pdffontmgr.h"
 
@@ -45,7 +45,7 @@ class CFGAS_GEFont final : public Retainable {
   bool GetBBox(FX_RECT* bbox);
 
   RetainPtr<CFGAS_GEFont> GetSubstFont(int32_t iGlyphIndex);
-  CFX_Font* GetDevFont() const { return m_pFont; }
+  CFX_Font* GetDevFont() const { return m_pFont.Get(); }
 
   void SetLogicalFontStyle(uint32_t dwLogFontStyle) {
     m_bUseLogFontStyle = true;
@@ -71,9 +71,8 @@ class CFGAS_GEFont final : public Retainable {
   WideString GetFamilyName() const;
 
   bool m_bUseLogFontStyle = false;
-  bool m_bExternalFont = false;
   uint32_t m_dwLogFontStyle = 0;
-  CFX_Font* m_pFont = nullptr;
+  MaybeOwned<CFX_Font> m_pFont;  // Must come before |m_pFontEncoding|.
   CFGAS_FontMgr::ObservedPtr const m_pFontMgr;
   std::unique_ptr<CFX_UnicodeEncodingEx> m_pFontEncoding;
   std::map<wchar_t, int32_t> m_CharWidthMap;
-- 
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