Replace some #ifdef PDF_ENABLE_XFA with runtime checks.

Abstract GetUserPermissions() differences via new virtual method.
Abstract GetPageCount() differences via existing virtual method.
Remove unused ReadHeader() form for non-xfa.
Remove unused FindSubstFontByUnicode() for xfa.
Remove unused FXFONT_EXACTMATCH

Change-Id: I0a3de01a9841db86fcbc96991d3fa2682393b9ad
Reviewed-on: https://pdfium-review.googlesource.com/32831
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>

3 files changed, 1 insertions, 48 deletions

diff --git a/core/fxge/cfx_fontmapper.cpp b/core/fxge/cfx_fontmapper.cpp
index f44e7aab69..b9a8eac1a1 100644
--- a/core/fxge/cfx_fontmapper.cpp
+++ b/core/fxge/cfx_fontmapper.cpp
@@ -611,10 +611,6 @@ FXFT_Face CFX_FontMapper::FindSubstFont(const ByteString& name,
   void* hFont = m_pFontInfo->MapFont(weight, bItalic, Charset, PitchFamily,
                                      family.c_str());
   if (!hFont) {
-#ifdef PDF_ENABLE_XFA
-    if (flags & FXFONT_EXACTMATCH)
-      return nullptr;
-#endif  // PDF_ENABLE_XFA
     if (bCJK) {
       bItalic = italic_angle != 0;
       weight = old_weight;
@@ -697,41 +693,6 @@ FXFT_Face CFX_FontMapper::FindSubstFont(const ByteString& name,
   return face;
 }
 
-#ifdef PDF_ENABLE_XFA
-FXFT_Face CFX_FontMapper::FindSubstFontByUnicode(uint32_t dwUnicode,
-                                                 uint32_t flags,
-                                                 int weight,
-                                                 int italic_angle) {
-  if (!m_pFontInfo)
-    return nullptr;
-
-  bool bItalic = (flags & FXFONT_ITALIC) != 0;
-  int PitchFamily = 0;
-  UpdatePitchFamily(flags, &PitchFamily);
-  void* hFont =
-      m_pFontInfo->MapFontByUnicode(dwUnicode, weight, bItalic, PitchFamily);
-  if (!hFont)
-    return nullptr;
-
-  uint32_t ttc_size = m_pFontInfo->GetFontData(hFont, 0x74746366, nullptr, 0);
-  uint32_t font_size = m_pFontInfo->GetFontData(hFont, 0, nullptr, 0);
-  if (font_size == 0 && ttc_size == 0) {
-    m_pFontInfo->DeleteFont(hFont);
-    return nullptr;
-  }
-  FXFT_Face face = nullptr;
-  if (ttc_size) {
-    face = GetCachedTTCFace(hFont, 0x74746366, ttc_size, font_size);
-  } else {
-    ByteString SubstName;
-    m_pFontInfo->GetFaceName(hFont, &SubstName);
-    face = GetCachedFace(hFont, SubstName, weight, bItalic, font_size);
-  }
-  m_pFontInfo->DeleteFont(hFont);
-  return face;
-}
-#endif  // PDF_ENABLE_XFA
-
 int CFX_FontMapper::GetFaceSize() const {
   return pdfium::CollectionSize<int>(m_FaceArray);
 }
diff --git a/core/fxge/cfx_fontmapper.h b/core/fxge/cfx_fontmapper.h
index 215eec97c2..15bd9f0279 100644
--- a/core/fxge/cfx_fontmapper.h
+++ b/core/fxge/cfx_fontmapper.h
@@ -34,12 +34,7 @@ class CFX_FontMapper {
                           int italic_angle,
                           int CharsetCP,
                           CFX_SubstFont* pSubstFont);
-#ifdef PDF_ENABLE_XFA
-  FXFT_Face FindSubstFontByUnicode(uint32_t dwUnicode,
-                                   uint32_t flags,
-                                   int weight,
-                                   int italic_angle);
-#endif  // PDF_ENABLE_XFA
+
   bool IsBuiltinFace(const FXFT_Face face) const;
   int GetFaceSize() const;
   ByteString GetFaceName(int index) const { return m_FaceArray[index].name; }
diff --git a/core/fxge/fx_font.h b/core/fxge/fx_font.h
index cee870f62a..3e0751dbe8 100644
--- a/core/fxge/fx_font.h
+++ b/core/fxge/fx_font.h
@@ -49,9 +49,6 @@ using CFX_TypeFace = SkTypeface;
 /* Other font flags */
 #define FXFONT_USEEXTERNATTR 0x80000
 #define FXFONT_CIDFONT 0x100000
-#ifdef PDF_ENABLE_XFA
-#define FXFONT_EXACTMATCH 0x80000000
-#endif  // PDF_ENABLE_XFA
 
 #define GET_TT_SHORT(w) (uint16_t)(((w)[0] << 8) | (w)[1])
 #define GET_TT_LONG(w) \