Clean up fpdf_page_parsers

core/fpdfapi/page/fpdf_page_parser.cpp

-// Copyright 2014 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/fpdfapi/page/pageint.h"
-
-#include <memory>
-#include <utility>
-#include <vector>
-
-#include "core/fpdfapi/edit/cpdf_creator.h"
-#include "core/fpdfapi/font/cpdf_font.h"
-#include "core/fpdfapi/font/cpdf_type3font.h"
-#include "core/fpdfapi/page/cpdf_allstates.h"
-#include "core/fpdfapi/page/cpdf_docpagedata.h"
-#include "core/fpdfapi/page/cpdf_form.h"
-#include "core/fpdfapi/page/cpdf_formobject.h"
-#include "core/fpdfapi/page/cpdf_image.h"
-#include "core/fpdfapi/page/cpdf_imageobject.h"
-#include "core/fpdfapi/page/cpdf_meshstream.h"
-#include "core/fpdfapi/page/cpdf_pageobject.h"
-#include "core/fpdfapi/page/cpdf_pathobject.h"
-#include "core/fpdfapi/page/cpdf_shadingobject.h"
-#include "core/fpdfapi/page/cpdf_shadingpattern.h"
-#include "core/fpdfapi/page/cpdf_textobject.h"
-#include "core/fpdfapi/parser/cpdf_array.h"
-#include "core/fpdfapi/parser/cpdf_dictionary.h"
-#include "core/fpdfapi/parser/cpdf_document.h"
-#include "core/fpdfapi/parser/cpdf_name.h"
-#include "core/fpdfapi/parser/cpdf_number.h"
-#include "core/fpdfapi/parser/cpdf_reference.h"
-#include "core/fpdfapi/parser/cpdf_stream.h"
-#include "core/fpdfapi/parser/cpdf_stream_acc.h"
-#include "core/fpdfapi/parser/fpdf_parser_decode.h"
-#include "core/fxcrt/fx_safe_types.h"
-#include "core/fxge/cfx_graphstatedata.h"
-#include "core/fxge/cfx_pathdata.h"
-#include "third_party/base/ptr_util.h"
-
-namespace {
-
-struct PDF_AbbrPair {
-  const FX_CHAR* abbr;
-  const FX_CHAR* full_name;
-};
-
-const PDF_AbbrPair PDF_InlineKeyAbbr[] = {
-    {"BPC", "BitsPerComponent"}, {"CS", "ColorSpace"}, {"D", "Decode"},
-    {"DP", "DecodeParms"},       {"F", "Filter"},      {"H", "Height"},
-    {"IM", "ImageMask"},         {"I", "Interpolate"}, {"W", "Width"},
-};
-
-const PDF_AbbrPair PDF_InlineValueAbbr[] = {
-    {"G", "DeviceGray"},       {"RGB", "DeviceRGB"},
-    {"CMYK", "DeviceCMYK"},    {"I", "Indexed"},
-    {"AHx", "ASCIIHexDecode"}, {"A85", "ASCII85Decode"},
-    {"LZW", "LZWDecode"},      {"Fl", "FlateDecode"},
-    {"RL", "RunLengthDecode"}, {"CCF", "CCITTFaxDecode"},
-    {"DCT", "DCTDecode"},
-};
-
-struct AbbrReplacementOp {
-  bool is_replace_key;
-  CFX_ByteString key;
-  CFX_ByteStringC replacement;
-};
-
-CFX_ByteStringC PDF_FindFullName(const PDF_AbbrPair* table,
-                                 size_t count,
-                                 const CFX_ByteStringC& abbr) {
-  auto it = std::find_if(
-      table, table + count,
-      [abbr](const PDF_AbbrPair& pair) { return pair.abbr == abbr; });
-  return it != table + count ? CFX_ByteStringC(it->full_name)
-                             : CFX_ByteStringC();
-}
-
-}  // namespace
-
-CFX_ByteStringC PDF_FindKeyAbbreviationForTesting(const CFX_ByteStringC& abbr) {
-  return PDF_FindFullName(PDF_InlineKeyAbbr, FX_ArraySize(PDF_InlineKeyAbbr),
-                          abbr);
-}
-
-CFX_ByteStringC PDF_FindValueAbbreviationForTesting(
-    const CFX_ByteStringC& abbr) {
-  return PDF_FindFullName(PDF_InlineValueAbbr,
-                          FX_ArraySize(PDF_InlineValueAbbr), abbr);
-}
-
-void PDF_ReplaceAbbr(CPDF_Object* pObj) {
-  switch (pObj->GetType()) {
-    case CPDF_Object::DICTIONARY: {
-      CPDF_Dictionary* pDict = pObj->AsDictionary();
-      std::vector<AbbrReplacementOp> replacements;
-      for (const auto& it : *pDict) {
-        CFX_ByteString key = it.first;
-        CPDF_Object* value = it.second;
-        CFX_ByteStringC fullname =
-            PDF_FindFullName(PDF_InlineKeyAbbr, FX_ArraySize(PDF_InlineKeyAbbr),
-                             key.AsStringC());
-        if (!fullname.IsEmpty()) {
-          AbbrReplacementOp op;
-          op.is_replace_key = true;
-          op.key = key;
-          op.replacement = fullname;
-          replacements.push_back(op);
-          key = fullname;
-        }
-
-        if (value->IsName()) {
-          CFX_ByteString name = value->GetString();
-          fullname = PDF_FindFullName(PDF_InlineValueAbbr,
-                                      FX_ArraySize(PDF_InlineValueAbbr),
-                                      name.AsStringC());
-          if (!fullname.IsEmpty()) {
-            AbbrReplacementOp op;
-            op.is_replace_key = false;
-            op.key = key;
-            op.replacement = fullname;
-            replacements.push_back(op);
-          }
-        } else {
-          PDF_ReplaceAbbr(value);
-        }
-      }
-      for (const auto& op : replacements) {
-        if (op.is_replace_key)
-          pDict->ReplaceKey(op.key, CFX_ByteString(op.replacement));
-        else
-          pDict->SetNameFor(op.key, CFX_ByteString(op.replacement));
-      }
-      break;
-    }
-    case CPDF_Object::ARRAY: {
-      CPDF_Array* pArray = pObj->AsArray();
-      for (size_t i = 0; i < pArray->GetCount(); i++) {
-        CPDF_Object* pElement = pArray->GetObjectAt(i);
-        if (pElement->IsName()) {
-          CFX_ByteString name = pElement->GetString();
-          CFX_ByteStringC fullname = PDF_FindFullName(
-              PDF_InlineValueAbbr, FX_ArraySize(PDF_InlineValueAbbr),
-              name.AsStringC());
-          if (!fullname.IsEmpty()) {
-            pArray->SetAt(i, new CPDF_Name(CFX_ByteString(fullname)));
-          }
-        } else {
-          PDF_ReplaceAbbr(pElement);
-        }
-      }
-      break;
-    }
-    default:
-      break;
-  }
-}