core/fpdfdoc/cpdf_actionfields.cpp


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75

// 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/cpdf_actionfields.h"

#include "core/fpdfapi/parser/cpdf_array.h"
#include "core/fpdfapi/parser/cpdf_dictionary.h"
#include "core/fpdfdoc/cpdf_action.h"

CPDF_ActionFields::CPDF_ActionFields(const CPDF_Action* pAction)
    : m_pAction(pAction) {}

CPDF_ActionFields::~CPDF_ActionFields() = default;

std::vector<const CPDF_Object*> CPDF_ActionFields::GetAllFields() const {
  std::vector<const CPDF_Object*> fields;
  if (!m_pAction)
    return fields;

  const CPDF_Dictionary* pDict = m_pAction->GetDict();
  if (!pDict)
    return fields;

  ByteString csType = pDict->GetStringFor("S");
  const CPDF_Object* pFields;
  if (csType == "Hide")
    pFields = pDict->GetDirectObjectFor("T");
  else
    pFields = pDict->GetArrayFor("Fields");

  if (!pFields)
    return fields;

  if (pFields->IsDictionary() || pFields->IsString()) {
    fields.push_back(pFields);
  } else if (const CPDF_Array* pArray = pFields->AsArray()) {
    for (size_t i = 0; i < pArray->GetCount(); ++i) {
      const CPDF_Object* pObj = pArray->GetDirectObjectAt(i);
      if (pObj)
        fields.push_back(pObj);
    }
  }
  return fields;
}

const CPDF_Object* CPDF_ActionFields::GetField(size_t iIndex) const {
  if (!m_pAction)
    return nullptr;

  const CPDF_Dictionary* pDict = m_pAction->GetDict();
  if (!pDict)
    return nullptr;

  ByteString csType = pDict->GetStringFor("S");
  const CPDF_Object* pFields;
  if (csType == "Hide")
    pFields = pDict->GetDirectObjectFor("T");
  else
    pFields = pDict->GetArrayFor("Fields");

  if (!pFields)
    return nullptr;

  const CPDF_Object* pFindObj = nullptr;
  if (pFields->IsDictionary() || pFields->IsString()) {
    if (iIndex == 0)
      pFindObj = pFields;
  } else if (const CPDF_Array* pArray = pFields->AsArray()) {
    pFindObj = pArray->GetDirectObjectAt(iIndex);
  }
  return pFindObj;
}