Split core/include/fpdfdoc/fpdf_ap.h

core/fpdfdoc/cpvt_generateap.cpp

Index: core/fpdfdoc/cpvt_generateap.cpp
diff --git a/core/fpdfdoc/doc_ap.cpp b/core/fpdfdoc/cpvt_generateap.cpp
similarity index 74%
copy from core/fpdfdoc/doc_ap.cpp
copy to core/fpdfdoc/cpvt_generateap.cpp
index e87b21b8ecbb279c5f91673d1985e789438984a5..f9d6e9630b6f95da771572094e79e92fe8746ef1 100644
--- a/core/fpdfdoc/doc_ap.cpp
+++ b/core/fpdfdoc/cpvt_generateap.cpp
@@ -1,305 +1,52 @@
-// Copyright 2014 PDFium Authors. All rights reserved.
+// Copyright 2016 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
+#include "core/fpdfdoc/cpvt_generateap.h"
+
 #include "core/fpdfapi/fpdf_font/include/cpdf_font.h"
-#include "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
+#include "core/fpdfapi/fpdf_parser/include/cpdf_dictionary.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_document.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_simple_parser.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_stream.h"
-#include "core/fpdfdoc/doc_utils.h"
+#include "core/fpdfdoc/cpvt_color.h"
+#include "core/fpdfdoc/cpvt_fontmap.h"
+#include "core/fpdfdoc/cpvt_provider.h"
 #include "core/fpdfdoc/pdf_vt.h"
-#include "core/include/fpdfdoc/fpdf_ap.h"
 #include "core/include/fpdfdoc/fpdf_doc.h"
-#include "core/include/fpdfdoc/fpdf_vt.h"
-
-#define PBS_SOLID 0
-#define PBS_DASH 1
-#define PBS_BEVELED 2
-#define PBS_INSET 3
-#define PBS_UNDERLINED 4
 
-FX_BOOL FPDF_GenerateAP(CPDF_Document* pDoc, CPDF_Dictionary* pAnnotDict) {
-  if (!pAnnotDict || pAnnotDict->GetConstStringBy("Subtype") != "Widget") {
-    return FALSE;
-  }
-  CFX_ByteString field_type = FPDF_GetFieldAttr(pAnnotDict, "FT")->GetString();
-  uint32_t flags = FPDF_GetFieldAttr(pAnnotDict, "Ff")
-                       ? FPDF_GetFieldAttr(pAnnotDict, "Ff")->GetInteger()
-                       : 0;
-  if (field_type == "Tx") {
-    return CPVT_GenerateAP::GenerateTextFieldAP(pDoc, pAnnotDict);
-  }
-  if (field_type == "Ch") {
-    return (flags & (1 << 17))
-               ? CPVT_GenerateAP::GenerateComboBoxAP(pDoc, pAnnotDict)
-               : CPVT_GenerateAP::GenerateListBoxAP(pDoc, pAnnotDict);
-  }
-  if (field_type == "Btn") {
-    if (!(flags & (1 << 16))) {
-      if (!pAnnotDict->KeyExist("AS")) {
-        if (CPDF_Dictionary* pParentDict = pAnnotDict->GetDictBy("Parent")) {
-          if (pParentDict->KeyExist("AS")) {
-            pAnnotDict->SetAtString("AS", pParentDict->GetStringBy("AS"));
-          }
-        }
-      }
-    }
-  }
-  return FALSE;
-}
+namespace {
 
-class CPVT_FontMap : public IPVT_FontMap {
- public:
-  CPVT_FontMap(CPDF_Document* pDoc,
-               CPDF_Dictionary* pResDict,
-               CPDF_Font* pDefFont,
-               const CFX_ByteString& sDefFontAlias);
-  ~CPVT_FontMap() override;
-
-  // IPVT_FontMap
-  CPDF_Font* GetPDFFont(int32_t nFontIndex) override;
-  CFX_ByteString GetPDFFontAlias(int32_t nFontIndex) override;
-
-  static void GetAnnotSysPDFFont(CPDF_Document* pDoc,
-                                 CPDF_Dictionary* pResDict,
-                                 CPDF_Font*& pSysFont,
-                                 CFX_ByteString& sSysFontAlias);
-
- private:
-  CPDF_Document* m_pDocument;
-  CPDF_Dictionary* m_pResDict;
-  CPDF_Font* m_pDefFont;
-  CFX_ByteString m_sDefFontAlias;
-  CPDF_Font* m_pSysFont;
-  CFX_ByteString m_sSysFontAlias;
-};
-
-CPVT_FontMap::CPVT_FontMap(CPDF_Document* pDoc,
-                           CPDF_Dictionary* pResDict,
-                           CPDF_Font* pDefFont,
-                           const CFX_ByteString& sDefFontAlias)
-    : m_pDocument(pDoc),
-      m_pResDict(pResDict),
-      m_pDefFont(pDefFont),
-      m_sDefFontAlias(sDefFontAlias),
-      m_pSysFont(NULL),
-      m_sSysFontAlias() {}
-CPVT_FontMap::~CPVT_FontMap() {}
-void CPVT_FontMap::GetAnnotSysPDFFont(CPDF_Document* pDoc,
-                                      CPDF_Dictionary* pResDict,
-                                      CPDF_Font*& pSysFont,
-                                      CFX_ByteString& sSysFontAlias) {
-  if (pDoc && pResDict) {
-    CFX_ByteString sFontAlias;
-    CPDF_Dictionary* pFormDict = pDoc->GetRoot()->GetDictBy("AcroForm");
-    if (CPDF_Font* pPDFFont =
-            AddNativeInterFormFont(pFormDict, pDoc, sSysFontAlias)) {
-      if (CPDF_Dictionary* pFontList = pResDict->GetDictBy("Font")) {
-        if (!pFontList->KeyExist(sSysFontAlias)) {
-          pFontList->SetAtReference(sSysFontAlias, pDoc,
-                                    pPDFFont->GetFontDict());
-        }
-      }
-      pSysFont = pPDFFont;
-    }
-  }
-}
-CPDF_Font* CPVT_FontMap::GetPDFFont(int32_t nFontIndex) {
-  switch (nFontIndex) {
-    case 0:
-      return m_pDefFont;
-    case 1:
-      if (!m_pSysFont) {
-        GetAnnotSysPDFFont(m_pDocument, m_pResDict, m_pSysFont,
-                           m_sSysFontAlias);
-      }
-      return m_pSysFont;
-  }
-  return NULL;
-}
-CFX_ByteString CPVT_FontMap::GetPDFFontAlias(int32_t nFontIndex) {
-  switch (nFontIndex) {
-    case 0:
-      return m_sDefFontAlias;
-    case 1:
-      if (!m_pSysFont) {
-        GetAnnotSysPDFFont(m_pDocument, m_pResDict, m_pSysFont,
-                           m_sSysFontAlias);
-      }
-      return m_sSysFontAlias;
-  }
-  return "";
-}
-CPVT_Provider::CPVT_Provider(IPVT_FontMap* pFontMap) : m_pFontMap(pFontMap) {
-  ASSERT(m_pFontMap);
-}
-CPVT_Provider::~CPVT_Provider() {}
-int32_t CPVT_Provider::GetCharWidth(int32_t nFontIndex,
-                                    uint16_t word,
-                                    int32_t nWordStyle) {
-  if (CPDF_Font* pPDFFont = m_pFontMap->GetPDFFont(nFontIndex)) {
-    uint32_t charcode = pPDFFont->CharCodeFromUnicode(word);
-    if (charcode != CPDF_Font::kInvalidCharCode) {
-      return pPDFFont->GetCharWidthF(charcode);
-    }
-  }
-  return 0;
-}
-int32_t CPVT_Provider::GetTypeAscent(int32_t nFontIndex) {
-  if (CPDF_Font* pPDFFont = m_pFontMap->GetPDFFont(nFontIndex)) {
-    return pPDFFont->GetTypeAscent();
-  }
-  return 0;
-}
-int32_t CPVT_Provider::GetTypeDescent(int32_t nFontIndex) {
-  if (CPDF_Font* pPDFFont = m_pFontMap->GetPDFFont(nFontIndex)) {
-    return pPDFFont->GetTypeDescent();
-  }
-  return 0;
-}
-int32_t CPVT_Provider::GetWordFontIndex(uint16_t word,
-                                        int32_t charset,
-                                        int32_t nFontIndex) {
-  if (CPDF_Font* pDefFont = m_pFontMap->GetPDFFont(0)) {
-    if (pDefFont->CharCodeFromUnicode(word) != CPDF_Font::kInvalidCharCode) {
-      return 0;
-    }
-  }
-  if (CPDF_Font* pSysFont = m_pFontMap->GetPDFFont(1)) {
-    if (pSysFont->CharCodeFromUnicode(word) != CPDF_Font::kInvalidCharCode) {
-      return 1;
-    }
-  }
-  return -1;
-}
-FX_BOOL CPVT_Provider::IsLatinWord(uint16_t word) {
-  if ((word >= 0x61 && word <= 0x7A) || (word >= 0x41 && word <= 0x5A) ||
-      word == 0x2D || word == 0x27) {
-    return TRUE;
-  }
-  return FALSE;
-}
-int32_t CPVT_Provider::GetDefaultFontIndex() {
-  return 0;
-}
-
-static CFX_ByteString GetPDFWordString(IPVT_FontMap* pFontMap,
-                                       int32_t nFontIndex,
-                                       uint16_t Word,
-                                       uint16_t SubWord) {
-  CFX_ByteString sWord;
-  if (SubWord > 0) {
-    sWord.Format("%c", SubWord);
-    return sWord;
-  }
-
-  if (!pFontMap)
-    return sWord;
-
-  if (CPDF_Font* pPDFFont = pFontMap->GetPDFFont(nFontIndex)) {
-    if (pPDFFont->GetBaseFont().Compare("Symbol") == 0 ||
-        pPDFFont->GetBaseFont().Compare("ZapfDingbats") == 0) {
-      sWord.Format("%c", Word);
-    } else {
-      uint32_t dwCharCode = pPDFFont->CharCodeFromUnicode(Word);
-      if (dwCharCode != CPDF_Font::kInvalidCharCode) {
-        pPDFFont->AppendChar(sWord, dwCharCode);
-      }
-    }
-  }
-  return sWord;
-}
-
-static CFX_ByteString GetWordRenderString(const CFX_ByteString& strWords) {
-  if (strWords.GetLength() > 0) {
-    return PDF_EncodeString(strWords) + " Tj\n";
-  }
-  return "";
-}
-static CFX_ByteString GetFontSetString(IPVT_FontMap* pFontMap,
-                                       int32_t nFontIndex,
-                                       FX_FLOAT fFontSize) {
-  CFX_ByteTextBuf sRet;
-  if (pFontMap) {
-    CFX_ByteString sFontAlias = pFontMap->GetPDFFontAlias(nFontIndex);
-    if (sFontAlias.GetLength() > 0 && fFontSize > 0) {
-      sRet << "/" << sFontAlias << " " << fFontSize << " Tf\n";
-    }
-  }
-  return sRet.GetByteString();
-}
-static CPVT_Color ParseColor(const CFX_ByteString& str) {
-  CPDF_SimpleParser syntax(str);
-  if (syntax.FindTagParamFromStart("g", 1)) {
-    return CPVT_Color(CPVT_Color::kGray, FX_atof(syntax.GetWord()));
-  }
-  if (syntax.FindTagParamFromStart("rg", 3)) {
-    FX_FLOAT f1 = FX_atof(syntax.GetWord());
-    FX_FLOAT f2 = FX_atof(syntax.GetWord());
-    FX_FLOAT f3 = FX_atof(syntax.GetWord());
-    return CPVT_Color(CPVT_Color::kRGB, f1, f2, f3);
-  }
-  if (syntax.FindTagParamFromStart("k", 4)) {
-    FX_FLOAT f1 = FX_atof(syntax.GetWord());
-    FX_FLOAT f2 = FX_atof(syntax.GetWord());
-    FX_FLOAT f3 = FX_atof(syntax.GetWord());
-    FX_FLOAT f4 = FX_atof(syntax.GetWord());
-    return CPVT_Color(CPVT_Color::kCMYK, f1, f2, f3, f4);
-  }
-  return CPVT_Color(CPVT_Color::kTransparent);
-}
-static CPVT_Color ParseColor(const CPDF_Array& array) {
-  CPVT_Color rt;
-  switch (array.GetCount()) {
-    case 1:
-      rt = CPVT_Color(CPVT_Color::kGray, array.GetFloatAt(0));
-      break;
-    case 3:
-      rt = CPVT_Color(CPVT_Color::kRGB, array.GetFloatAt(0),
-                      array.GetFloatAt(1), array.GetFloatAt(2));
-      break;
-    case 4:
-      rt = CPVT_Color(CPVT_Color::kCMYK, array.GetFloatAt(0),
-                      array.GetFloatAt(1), array.GetFloatAt(2),
-                      array.GetFloatAt(3));
-      break;
-  }
-  return rt;
-}
-static FX_BOOL GenerateWidgetAP(CPDF_Document* pDoc,
-                                CPDF_Dictionary* pAnnotDict,
-                                const int32_t& nWidgetType) {
-  CPDF_Dictionary* pFormDict = NULL;
-  if (CPDF_Dictionary* pRootDict = pDoc->GetRoot()) {
+FX_BOOL GenerateWidgetAP(CPDF_Document* pDoc,
+                         CPDF_Dictionary* pAnnotDict,
+                         const int32_t& nWidgetType) {
+  CPDF_Dictionary* pFormDict = nullptr;
+  if (CPDF_Dictionary* pRootDict = pDoc->GetRoot())
     pFormDict = pRootDict->GetDictBy("AcroForm");
-  }
-  if (!pFormDict) {
+  if (!pFormDict)
     return FALSE;
-  }
+
   CFX_ByteString DA;
-  if (CPDF_Object* pDAObj = FPDF_GetFieldAttr(pAnnotDict, "DA")) {
+  if (CPDF_Object* pDAObj = FPDF_GetFieldAttr(pAnnotDict, "DA"))
     DA = pDAObj->GetString();
-  }
-  if (DA.IsEmpty()) {
+  if (DA.IsEmpty())
     DA = pFormDict->GetStringBy("DA");
-  }
-  if (DA.IsEmpty()) {
+  if (DA.IsEmpty())
     return FALSE;
-  }
+
   CPDF_SimpleParser syntax(DA);
   syntax.FindTagParamFromStart("Tf", 2);
   CFX_ByteString sFontName = syntax.GetWord();
   sFontName = PDF_NameDecode(sFontName);
-  if (sFontName.IsEmpty()) {
+  if (sFontName.IsEmpty())
     return FALSE;
-  }
+
   FX_FLOAT fFontSize = FX_atof(syntax.GetWord());
-  CPVT_Color crText = ParseColor(DA);
+  CPVT_Color crText = CPVT_Color::ParseColor(DA);
   FX_BOOL bUseFormRes = FALSE;
-  CPDF_Dictionary* pFontDict = NULL;
+  CPDF_Dictionary* pFontDict = nullptr;
   CPDF_Dictionary* pDRDict = pAnnotDict->GetDictBy("DR");
   if (!pDRDict) {
     pDRDict = pFormDict->GetDictBy("DR");
@@ -311,14 +58,13 @@ static FX_BOOL GenerateWidgetAP(CPDF_Document* pDoc,
     if (!pFontDict && !bUseFormRes) {
       pDRDict = pFormDict->GetDictBy("DR");
       pDRFontDict = pDRDict->GetDictBy("Font");
-      if (pDRFontDict) {
+      if (pDRFontDict)
         pFontDict = pDRFontDict->GetDictBy(sFontName.Mid(1));
-      }
     }
   }
-  if (!pDRFontDict) {
+  if (!pDRFontDict)
     return FALSE;
-  }
+
   if (!pFontDict) {
     pFontDict = new CPDF_Dictionary;
     pFontDict->SetAtName("Type", "Font");
@@ -329,14 +75,14 @@ static FX_BOOL GenerateWidgetAP(CPDF_Document* pDoc,
     pDRFontDict->SetAtReference(sFontName.Mid(1), pDoc, pFontDict);
   }
   CPDF_Font* pDefFont = pDoc->LoadFont(pFontDict);
-  if (!pDefFont) {
+  if (!pDefFont)
     return FALSE;
-  }
+
   CFX_FloatRect rcAnnot = pAnnotDict->GetRectBy("Rect");
   int32_t nRotate = 0;
-  if (CPDF_Dictionary* pMKDict = pAnnotDict->GetDictBy("MK")) {
+  if (CPDF_Dictionary* pMKDict = pAnnotDict->GetDictBy("MK"))
     nRotate = pMKDict->GetIntegerBy("R");
-  }
+
   CFX_FloatRect rcBBox;
   CFX_Matrix matrix;
   switch (nRotate % 360) {
@@ -366,9 +112,9 @@ static FX_BOOL GenerateWidgetAP(CPDF_Document* pDoc,
   CPVT_Dash dsBorder(3, 0, 0);
   CPVT_Color crLeftTop, crRightBottom;
   if (CPDF_Dictionary* pBSDict = pAnnotDict->GetDictBy("BS")) {
-    if (pBSDict->KeyExist("W")) {
+    if (pBSDict->KeyExist("W"))
       fBorderWidth = pBSDict->GetNumberBy("W");
-    }
+
     if (CPDF_Array* pArray = pBSDict->GetArrayBy("D")) {
       dsBorder = CPVT_Dash(pArray->GetIntegerAt(0), pArray->GetIntegerAt(1),
                            pArray->GetIntegerAt(2));
@@ -399,12 +145,10 @@ static FX_BOOL GenerateWidgetAP(CPDF_Document* pDoc,
   }
   CPVT_Color crBorder, crBG;
   if (CPDF_Dictionary* pMKDict = pAnnotDict->GetDictBy("MK")) {
-    if (CPDF_Array* pArray = pMKDict->GetArrayBy("BC")) {
-      crBorder = ParseColor(*pArray);
-    }
-    if (CPDF_Array* pArray = pMKDict->GetArrayBy("BG")) {
-      crBG = ParseColor(*pArray);
-    }
+    if (CPDF_Array* pArray = pMKDict->GetArrayBy("BC"))
+      crBorder = CPVT_Color::ParseColor(*pArray);
+    if (CPDF_Array* pArray = pMKDict->GetArrayBy("BG"))
+      crBG = CPVT_Color::ParseColor(*pArray);
   }
   CFX_ByteTextBuf sAppStream;
   CFX_ByteString sBG = CPVT_GenerateAP::GenerateColorAP(crBG, TRUE);
@@ -416,9 +160,9 @@ static FX_BOOL GenerateWidgetAP(CPDF_Document* pDoc,
   CFX_ByteString sBorderStream = CPVT_GenerateAP::GenerateBorderAP(
       rcBBox, fBorderWidth, crBorder, crLeftTop, crRightBottom, nBorderStyle,
       dsBorder);
-  if (sBorderStream.GetLength() > 0) {
+  if (sBorderStream.GetLength() > 0)
     sAppStream << "q\n" << sBorderStream << "Q\n";
-  }
+
   CFX_FloatRect rcBody =
       CFX_FloatRect(rcBBox.left + fBorderWidth, rcBBox.bottom + fBorderWidth,
                     rcBBox.right - fBorderWidth, rcBBox.top - fBorderWidth);
@@ -445,9 +189,8 @@ static FX_BOOL GenerateWidgetAP(CPDF_Document* pDoc,
         pStreamResFontList = new CPDF_Dictionary;
         pStreamResList->SetAt("Font", pStreamResFontList);
       }
-      if (!pStreamResFontList->KeyExist(sFontName)) {
+      if (!pStreamResFontList->KeyExist(sFontName))
         pStreamResFontList->SetAtReference(sFontName, pDoc, pFontDict);
-      }
     } else {
       pStreamDict->SetAt("Resources", pFormDict->GetDictBy("DR")->Clone());
       pStreamResList = pStreamDict->GetDictBy("Resources");
@@ -469,19 +212,19 @@ static FX_BOOL GenerateWidgetAP(CPDF_Document* pDoc,
           FPDF_GetFieldAttr(pAnnotDict, "MaxLen")
               ? FPDF_GetFieldAttr(pAnnotDict, "MaxLen")->GetInteger()
               : 0;
-      CPVT_FontMap map(pDoc,
-                       pStreamDict ? pStreamDict->GetDictBy("Resources") : NULL,
-                       pDefFont, sFontName.Right(sFontName.GetLength() - 1));
+      CPVT_FontMap map(
+          pDoc, pStreamDict ? pStreamDict->GetDictBy("Resources") : nullptr,
+          pDefFont, sFontName.Right(sFontName.GetLength() - 1));
       CPVT_Provider prd(&map);
       CPDF_VariableText vt;
       vt.SetProvider(&prd);
       vt.SetPlateRect(rcBody);
       vt.SetAlignment(nAlign);
-      if (IsFloatZero(fFontSize)) {
+      if (IsFloatZero(fFontSize))
         vt.SetAutoFontSize(TRUE);
-      } else {
+      else
         vt.SetFontSize(fFontSize);
-      }
+
       FX_BOOL bMultiLine = (dwFlags >> 12) & 1;
       if (bMultiLine) {
         vt.SetMultiLine(TRUE);
@@ -493,11 +236,11 @@ static FX_BOOL GenerateWidgetAP(CPDF_Document* pDoc,
         vt.SetPasswordChar(subWord);
       }
       FX_BOOL bCharArray = (dwFlags >> 24) & 1;
-      if (bCharArray) {
+      if (bCharArray)
         vt.SetCharArray(dwMaxLen);
-      } else {
+      else
         vt.SetLimitChar(dwMaxLen);
-      }
+
       vt.Initialize();
       vt.SetText(swValue.c_str());
       vt.RearrangeAll();
@@ -528,9 +271,9 @@ static FX_BOOL GenerateWidgetAP(CPDF_Document* pDoc,
           FPDF_GetFieldAttr(pAnnotDict, "V")
               ? FPDF_GetFieldAttr(pAnnotDict, "V")->GetUnicodeText()
               : CFX_WideString();
-      CPVT_FontMap map(pDoc,
-                       pStreamDict ? pStreamDict->GetDictBy("Resources") : NULL,
-                       pDefFont, sFontName.Right(sFontName.GetLength() - 1));
+      CPVT_FontMap map(
+          pDoc, pStreamDict ? pStreamDict->GetDictBy("Resources") : nullptr,
+          pDefFont, sFontName.Right(sFontName.GetLength() - 1));
       CPVT_Provider prd(&map);
       CPDF_VariableText vt;
       vt.SetProvider(&prd);
@@ -541,11 +284,11 @@ static FX_BOOL GenerateWidgetAP(CPDF_Document* pDoc,
       rcEdit.right = rcButton.left;
       rcEdit.Normalize();
       vt.SetPlateRect(rcEdit);
-      if (IsFloatZero(fFontSize)) {
+      if (IsFloatZero(fFontSize))
         vt.SetAutoFontSize(TRUE);
-      } else {
+      else
         vt.SetFontSize(fFontSize);
-      }
+
       vt.Initialize();
       vt.SetText(swValue.c_str());
       vt.RearrangeAll();
@@ -577,9 +320,9 @@ static FX_BOOL GenerateWidgetAP(CPDF_Document* pDoc,
             CPVT_Color(CPVT_Color::kGray, 1),
             CPVT_Color(CPVT_Color::kGray, 0.5), PBS_BEVELED,
             CPVT_Dash(3, 0, 0));
-        if (sButtonBorder.GetLength() > 0) {
+        if (sButtonBorder.GetLength() > 0)
           sAppStream << "q\n" << sButtonBorder << "Q\n";
-        }
+
         CFX_FloatPoint ptCenter =
             CFX_FloatPoint((rcButton.left + rcButton.right) / 2,
                            (rcButton.top + rcButton.bottom) / 2);
@@ -596,16 +339,16 @@ static FX_BOOL GenerateWidgetAP(CPDF_Document* pDoc,
       }
     } break;
     case 2: {
-      CPVT_FontMap map(pDoc,
-                       pStreamDict ? pStreamDict->GetDictBy("Resources") : NULL,
-                       pDefFont, sFontName.Right(sFontName.GetLength() - 1));
+      CPVT_FontMap map(
+          pDoc, pStreamDict ? pStreamDict->GetDictBy("Resources") : nullptr,
+          pDefFont, sFontName.Right(sFontName.GetLength() - 1));
       CPVT_Provider prd(&map);
       CPDF_Array* pOpts = FPDF_GetFieldAttr(pAnnotDict, "Opt")
                               ? FPDF_GetFieldAttr(pAnnotDict, "Opt")->GetArray()
-                              : NULL;
+                              : nullptr;
       CPDF_Array* pSels = FPDF_GetFieldAttr(pAnnotDict, "I")
                               ? FPDF_GetFieldAttr(pAnnotDict, "I")->GetArray()
-                              : NULL;
+                              : nullptr;
       int32_t nTop = FPDF_GetFieldAttr(pAnnotDict, "TI")
                          ? FPDF_GetFieldAttr(pAnnotDict, "TI")->GetInteger()
                          : 0;
@@ -613,9 +356,9 @@ static FX_BOOL GenerateWidgetAP(CPDF_Document* pDoc,
       if (pOpts) {
         FX_FLOAT fy = rcBody.top;
         for (int32_t i = nTop, sz = pOpts->GetCount(); i < sz; i++) {
-          if (IsFloatSmaller(fy, rcBody.bottom)) {
+          if (IsFloatSmaller(fy, rcBody.bottom))
             break;
-          }
+
           if (CPDF_Object* pOpt = pOpts->GetDirectObjectAt(i)) {
             CFX_WideString swItem;
             if (pOpt->IsString())
@@ -636,11 +379,8 @@ static FX_BOOL GenerateWidgetAP(CPDF_Document* pDoc,
             vt.SetProvider(&prd);
             vt.SetPlateRect(
                 CFX_FloatRect(rcBody.left, 0.0f, rcBody.right, 0.0f));
-            if (IsFloatZero(fFontSize)) {
-              vt.SetFontSize(12.0f);
-            } else {
-              vt.SetFontSize(fFontSize);
-            }
+            vt.SetFontSize(IsFloatZero(fFontSize) ? 12.0f : fFontSize);
+
             vt.Initialize();
             vt.SetText(swItem.c_str());
             vt.RearrangeAll();
@@ -695,9 +435,8 @@ static FX_BOOL GenerateWidgetAP(CPDF_Document* pDoc,
           pStreamResFontList = new CPDF_Dictionary;
           pStreamResList->SetAt("Font", pStreamResFontList);
         }
-        if (!pStreamResFontList->KeyExist(sFontName)) {
+        if (!pStreamResFontList->KeyExist(sFontName))
           pStreamResFontList->SetAtReference(sFontName, pDoc, pFontDict);
-        }
       } else {
         pStreamDict->SetAt("Resources", pFormDict->GetDictBy("DR")->Clone());
         pStreamResList = pStreamDict->GetDictBy("Resources");
@@ -706,18 +445,58 @@ static FX_BOOL GenerateWidgetAP(CPDF_Document* pDoc,
   }
   return TRUE;
 }
+
+}  // namespace
+
+FX_BOOL FPDF_GenerateAP(CPDF_Document* pDoc, CPDF_Dictionary* pAnnotDict) {
+  if (!pAnnotDict || pAnnotDict->GetConstStringBy("Subtype") != "Widget") {
+    return FALSE;
+  }
+  CFX_ByteString field_type = FPDF_GetFieldAttr(pAnnotDict, "FT")->GetString();
+  uint32_t flags = FPDF_GetFieldAttr(pAnnotDict, "Ff")
+                       ? FPDF_GetFieldAttr(pAnnotDict, "Ff")->GetInteger()
+                       : 0;
+  if (field_type == "Tx") {
+    return CPVT_GenerateAP::GenerateTextFieldAP(pDoc, pAnnotDict);
+  }
+  if (field_type == "Ch") {
+    return (flags & (1 << 17))
+               ? CPVT_GenerateAP::GenerateComboBoxAP(pDoc, pAnnotDict)
+               : CPVT_GenerateAP::GenerateListBoxAP(pDoc, pAnnotDict);
+  }
+  if (field_type == "Btn") {
+    if (!(flags & (1 << 16))) {
+      if (!pAnnotDict->KeyExist("AS")) {
+        if (CPDF_Dictionary* pParentDict = pAnnotDict->GetDictBy("Parent")) {
+          if (pParentDict->KeyExist("AS")) {
+            pAnnotDict->SetAtString("AS", pParentDict->GetStringBy("AS"));
+          }
+        }
+      }
+    }
+  }
+  return FALSE;
+}
+
+// Static.
 FX_BOOL CPVT_GenerateAP::GenerateTextFieldAP(CPDF_Document* pDoc,
                                              CPDF_Dictionary* pAnnotDict) {
   return GenerateWidgetAP(pDoc, pAnnotDict, 0);
 }
+
+// Static.
 FX_BOOL CPVT_GenerateAP::GenerateComboBoxAP(CPDF_Document* pDoc,
                                             CPDF_Dictionary* pAnnotDict) {
   return GenerateWidgetAP(pDoc, pAnnotDict, 1);
 }
+
+// Static.
 FX_BOOL CPVT_GenerateAP::GenerateListBoxAP(CPDF_Document* pDoc,
                                            CPDF_Dictionary* pAnnotDict) {
   return GenerateWidgetAP(pDoc, pAnnotDict, 2);
 }
+
+// Static.
 CFX_ByteString CPVT_GenerateAP::GenerateEditAP(
     IPVT_FontMap* pFontMap,
     IPDF_VariableText_Iterator* pIterator,
@@ -729,17 +508,17 @@ CFX_ByteString CPVT_GenerateAP::GenerateEditAP(
   CFX_FloatPoint ptOld(0.0f, 0.0f), ptNew(0.0f, 0.0f);
   int32_t nCurFontIndex = -1;
   if (pIterator) {
-    if (pVisible) {
+    if (pVisible)
       pIterator->SetAt(pVisible->BeginPos);
-    } else {
+    else
       pIterator->SetAt(0);
-    }
+
     CPVT_WordPlace oldplace;
     while (pIterator->NextWord()) {
       CPVT_WordPlace place = pIterator->GetAt();
-      if (pVisible && place.WordCmp(pVisible->EndPos) > 0) {
+      if (pVisible && place.WordCmp(pVisible->EndPos) > 0)
         break;
-      }
+
       if (bContinuous) {
         if (place.LineCmp(oldplace) != 0) {
           if (sWords.GetSize() > 0) {
@@ -807,6 +586,8 @@ CFX_ByteString CPVT_GenerateAP::GenerateEditAP(
   }
   return sEditStream.GetByteString();
 }
+
+// Static.
 CFX_ByteString CPVT_GenerateAP::GenerateBorderAP(
     const CFX_FloatRect& rect,
     FX_FLOAT fWidth,
@@ -913,6 +694,8 @@ CFX_ByteString CPVT_GenerateAP::GenerateBorderAP(
   }
   return sAppStream.GetByteString();
 }
+
+// Static.
 CFX_ByteString CPVT_GenerateAP::GenerateColorAP(const CPVT_Color& color,
                                                 const FX_BOOL& bFillOrStroke) {
   CFX_ByteTextBuf sColorStream;
@@ -936,3 +719,51 @@ CFX_ByteString CPVT_GenerateAP::GenerateColorAP(const CPVT_Color& color,
   }
   return sColorStream.GetByteString();
 }
+
+// Static.
+CFX_ByteString CPVT_GenerateAP::GetPDFWordString(IPVT_FontMap* pFontMap,
+                                                 int32_t nFontIndex,
+                                                 uint16_t Word,
+                                                 uint16_t SubWord) {
+  CFX_ByteString sWord;
+  if (SubWord > 0) {
+    sWord.Format("%c", SubWord);
+    return sWord;
+  }
+
+  if (!pFontMap)
+    return sWord;
+
+  if (CPDF_Font* pPDFFont = pFontMap->GetPDFFont(nFontIndex)) {
+    if (pPDFFont->GetBaseFont().Compare("Symbol") == 0 ||
+        pPDFFont->GetBaseFont().Compare("ZapfDingbats") == 0) {
+      sWord.Format("%c", Word);
+    } else {
+      uint32_t dwCharCode = pPDFFont->CharCodeFromUnicode(Word);
+      if (dwCharCode != CPDF_Font::kInvalidCharCode)
+        pPDFFont->AppendChar(sWord, dwCharCode);
+    }
+  }
+  return sWord;
+}
+
+// Static.
+CFX_ByteString CPVT_GenerateAP::GetWordRenderString(
+    const CFX_ByteString& strWords) {
+  if (strWords.GetLength() > 0)
+    return PDF_EncodeString(strWords) + " Tj\n";
+  return "";
+}
+
+// Static.
+CFX_ByteString CPVT_GenerateAP::GetFontSetString(IPVT_FontMap* pFontMap,
+                                                 int32_t nFontIndex,
+                                                 FX_FLOAT fFontSize) {
+  CFX_ByteTextBuf sRet;
+  if (pFontMap) {
+    CFX_ByteString sFontAlias = pFontMap->GetPDFFontAlias(nFontIndex);
+    if (sFontAlias.GetLength() > 0 && fFontSize > 0)
+      sRet << "/" << sFontAlias << " " << fFontSize << " Tf\n";
+  }
+  return sRet.GetByteString();
+}