Fix an assertion failure in CXFA_FWLTheme::Initialize()

The face names from font file stream may be different
with the ones from chromium. Pdfium should save face
names from chromium for font mapping when it works
in sandbox environment.

BUG=pdfium:392
BUG=pdfium:393
R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1710753002 .

2 files changed, 24 insertions, 15 deletions

diff --git a/xfa/src/fgas/src/font/fx_stdfontmgr.cpp b/xfa/src/fgas/src/font/fx_stdfontmgr.cpp
index 755d7e0c31..e645666616 100644
--- a/xfa/src/fgas/src/font/fx_stdfontmgr.cpp
+++ b/xfa/src/fgas/src/font/fx_stdfontmgr.cpp
@@ -624,7 +624,9 @@ FX_BOOL CFX_FontMgrImp::EnumFontsFromFontMapper() {
         CreateFontStream(pFontMapper, pSystemFontInfo, i);
     if (!pFontStream)
       continue;
-    ReportFaces(pFontStream);
+    CFX_WideString wsFaceName =
+        CFX_WideString::FromLocal(pFontMapper->GetFaceName(i).c_str());
+    RegisterFaces(pFontStream, &wsFaceName);
     pFontStream->Release();
   }
   if (m_InstalledFonts.GetSize() == 0)
@@ -643,7 +645,7 @@ FX_BOOL CFX_FontMgrImp::EnumFontsFromFiles() {
       pFontSource->Release();
       continue;
     }
-    ReportFaces(pFontStream);
+    RegisterFaces(pFontStream, nullptr);
     pFontStream->Release();
     pFontSource->Release();
   }
@@ -981,8 +983,7 @@ IFX_Font* CFX_FontMgrImp::LoadFont(const CFX_WideString& wsFaceName,
   IFX_SystemFontInfo* pSystemFontInfo = pFontMapper->GetSystemFontInfo();
   if (!pSystemFontInfo)
     return nullptr;
-  IFX_FileRead* pFontStream =
-      CreateFontStream(pFontMapper, pSystemFontInfo, iFaceIndex);
+  IFX_FileRead* pFontStream = CreateFontStream(wsFaceName.UTF8Encode());
   if (!pFontStream)
     return nullptr;
   if (!LoadFace(pFontStream, 0)) {
@@ -1300,9 +1301,10 @@ void CFX_FontMgrImp::RemoveFont(IFX_Font* pEFont) {
     }
   }
 }
-void CFX_FontMgrImp::ReportFace(FXFT_Face pFace,
-                                CFX_FontDescriptors& Fonts,
-                                IFX_FileAccess* pFontAccess) {
+void CFX_FontMgrImp::RegisterFace(FXFT_Face pFace,
+                                  CFX_FontDescriptors& Fonts,
+                                  const CFX_WideString* pFaceName,
+                                  IFX_FileAccess* pFontAccess) {
   if (0 == (pFace->face_flags & FT_FACE_FLAG_SCALABLE)) {
     return;
   }
@@ -1331,8 +1333,12 @@ void CFX_FontMgrImp::ReportFace(FXFT_Face pFace,
     FX_Free(pTable);
   }
   pFont->m_wsFamilyNames.Add(CFX_ByteString(pFace->family_name).UTF8Decode());
-  pFont->m_wsFaceName =
-      CFX_WideString::FromLocal(FXFT_Get_Postscript_Name(pFace));
+  if (pFaceName) {
+    pFont->m_wsFaceName = *pFaceName;
+  } else {
+    pFont->m_wsFaceName =
+        CFX_WideString::FromLocal(FXFT_Get_Postscript_Name(pFace));
+  }
   pFont->m_nFaceIndex = pFace->face_index;
   if (pFontAccess)
     pFont->m_pFileAccess = pFontAccess->Retain();
@@ -1340,7 +1346,8 @@ void CFX_FontMgrImp::ReportFace(FXFT_Face pFace,
     pFont->m_pFileAccess = nullptr;
   Fonts.Add(pFont);
 }
-void CFX_FontMgrImp::ReportFaces(IFX_FileRead* pFontStream) {
+void CFX_FontMgrImp::RegisterFaces(IFX_FileRead* pFontStream,
+                                   const CFX_WideString* pFaceName) {
   int32_t index = 0;
   int32_t num_faces = 0;
   do {
@@ -1350,7 +1357,7 @@ void CFX_FontMgrImp::ReportFaces(IFX_FileRead* pFontStream) {
     // All faces keep number of faces. It can be retrieved from any one face.
     if (!num_faces)
       num_faces = pFace->num_faces;
-    ReportFace(pFace, m_InstalledFonts, nullptr);
+    RegisterFace(pFace, m_InstalledFonts, pFaceName, nullptr);
     if (FXFT_Get_Face_External_Stream(pFace))
       FXFT_Clear_Face_External_Stream(pFace);
     FXFT_Done_Face(pFace);
diff --git a/xfa/src/fgas/src/font/fx_stdfontmgr.h b/xfa/src/fgas/src/font/fx_stdfontmgr.h
index 1d750e17fa..cdf07781da 100644
--- a/xfa/src/fgas/src/font/fx_stdfontmgr.h
+++ b/xfa/src/fgas/src/font/fx_stdfontmgr.h
@@ -190,10 +190,12 @@ class CFX_FontMgrImp : public IFX_FontMgr {
   FX_BOOL EnumFontsFromFiles();
 
  protected:
-  void ReportFace(FXFT_Face pFace,
-                  CFX_FontDescriptors& Fonts,
-                  IFX_FileAccess* pFontAccess);
-  void ReportFaces(IFX_FileRead* pFontStream);
+  void RegisterFace(FXFT_Face pFace,
+                    CFX_FontDescriptors& Fonts,
+                    const CFX_WideString* pFaceName,
+                    IFX_FileAccess* pFontAccess);
+  void RegisterFaces(IFX_FileRead* pFontStream,
+                     const CFX_WideString* pFaceName);
   void GetNames(const uint8_t* name_table, CFX_WideStringArray& Names);
   void GetCharsets(FXFT_Face pFace, CFX_WordArray& Charsets);
   void GetUSBCSB(FXFT_Face pFace, FX_DWORD* USB, FX_DWORD* CSB);