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
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
// 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_pagelabel.h"
#include "core/fpdfapi/parser/cpdf_dictionary.h"
#include "core/fpdfapi/parser/cpdf_document.h"
#include "core/fpdfapi/parser/fpdf_parser_decode.h"
#include "core/fpdfdoc/cpdf_numbertree.h"
namespace {
CFX_WideString MakeRoman(int num) {
const int kArabic[] = {1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1};
const CFX_WideString kRoman[] = {L"m", L"cm", L"d", L"cd", L"c",
L"xc", L"l", L"xl", L"x", L"ix",
L"v", L"iv", L"i"};
const int kMaxNum = 1000000;
num %= kMaxNum;
int i = 0;
CFX_WideString wsRomanNumber;
while (num > 0) {
while (num >= kArabic[i]) {
num = num - kArabic[i];
wsRomanNumber += kRoman[i];
}
i = i + 1;
}
return wsRomanNumber;
}
CFX_WideString MakeLetters(int num) {
if (num == 0)
return CFX_WideString();
CFX_WideString wsLetters;
const int nMaxCount = 1000;
const int nLetterCount = 26;
--num;
int count = num / nLetterCount + 1;
count %= nMaxCount;
wchar_t ch = L'a' + num % nLetterCount;
for (int i = 0; i < count; i++)
wsLetters += ch;
return wsLetters;
}
CFX_WideString GetLabelNumPortion(int num, const CFX_ByteString& bsStyle) {
CFX_WideString wsNumPortion;
if (bsStyle.IsEmpty())
return wsNumPortion;
if (bsStyle == "D") {
wsNumPortion.Format(L"%d", num);
} else if (bsStyle == "R") {
wsNumPortion = MakeRoman(num);
wsNumPortion.MakeUpper();
} else if (bsStyle == "r") {
wsNumPortion = MakeRoman(num);
} else if (bsStyle == "A") {
wsNumPortion = MakeLetters(num);
wsNumPortion.MakeUpper();
} else if (bsStyle == "a") {
wsNumPortion = MakeLetters(num);
}
return wsNumPortion;
}
} // namespace
CPDF_PageLabel::CPDF_PageLabel(CPDF_Document* pDocument)
: m_pDocument(pDocument) {}
CPDF_PageLabel::~CPDF_PageLabel() {}
bool CPDF_PageLabel::GetLabel(int nPage, CFX_WideString* wsLabel) const {
if (!m_pDocument)
return false;
if (nPage < 0 || nPage >= m_pDocument->GetPageCount())
return false;
const CPDF_Dictionary* pPDFRoot = m_pDocument->GetRoot();
if (!pPDFRoot)
return false;
CPDF_Dictionary* pLabels = pPDFRoot->GetDictFor("PageLabels");
if (!pLabels)
return false;
CPDF_NumberTree numberTree(pLabels);
CPDF_Object* pValue = nullptr;
int n = nPage;
while (n >= 0) {
pValue = numberTree.LookupValue(n);
if (pValue)
break;
n--;
}
if (pValue) {
pValue = pValue->GetDirect();
if (CPDF_Dictionary* pLabel = pValue->AsDictionary()) {
if (pLabel->KeyExist("P"))
*wsLabel += pLabel->GetUnicodeTextFor("P");
CFX_ByteString bsNumberingStyle = pLabel->GetStringFor("S", "");
int nLabelNum = nPage - n + pLabel->GetIntegerFor("St", 1);
CFX_WideString wsNumPortion =
GetLabelNumPortion(nLabelNum, bsNumberingStyle);
*wsLabel += wsNumPortion;
return true;
}
}
wsLabel->Format(L"%d", nPage + 1);
return true;
}
int32_t CPDF_PageLabel::GetPageByLabel(const CFX_ByteStringC& bsLabel) const {
if (!m_pDocument)
return -1;
const CPDF_Dictionary* pPDFRoot = m_pDocument->GetRoot();
if (!pPDFRoot)
return -1;
int nPages = m_pDocument->GetPageCount();
for (int i = 0; i < nPages; i++) {
CFX_WideString str;
if (!GetLabel(i, &str))
continue;
if (PDF_EncodeText(str).Compare(bsLabel))
return i;
}
int nPage = FXSYS_atoi(CFX_ByteString(bsLabel).c_str()); // NUL terminate.
return nPage > 0 && nPage <= nPages ? nPage : -1;
}
int32_t CPDF_PageLabel::GetPageByLabel(const CFX_WideStringC& wsLabel) const {
// TODO(tsepez): check usage of c_str() below.
return GetPageByLabel(
PDF_EncodeText(wsLabel.unterminated_c_str()).AsStringC());
}
|
