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
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
#include <qpdf/QIntC.hh>
#include <qpdf/QPDF.hh>
#include <qpdf/QPDFOutlineDocumentHelper.hh>
#include <qpdf/QPDFPageDocumentHelper.hh>
#include <qpdf/QTC.hh>
#include <qpdf/QUtil.hh>
#include <iostream>
#include <stdlib.h>
#include <string.h>
// This program demonstrates extraction of bookmarks using the qpdf
// outlines API. Note that all the information shown by this program
// can also be obtained from a PDF file using qpdf's --json option.
//
// Ignore calls to QTC::TC - they are for qpdf CI testing only.
static char const* whoami = nullptr;
static enum { st_none, st_numbers, st_lines } style = st_none;
static bool show_open = false;
static bool show_targets = false;
static std::map<QPDFObjGen, int> page_map;
void
usage()
{
std::cerr
<< "Usage: " << whoami << " [options] file.pdf [password]" << std::endl
<< "Options:" << std::endl
<< " --numbers give bookmarks outline-style numbers"
<< std::endl
<< " --lines draw lines to show bookmark hierarchy"
<< std::endl
<< " --show-open indicate whether a bookmark is initially open"
<< std::endl
<< " --show-targets show target if possible" << std::endl;
exit(2);
}
void
print_lines(std::vector<int>& numbers)
{
for (unsigned int i = 0; i < numbers.size() - 1; ++i) {
if (numbers.at(i)) {
std::cout << "| ";
} else {
std::cout << " ";
}
}
}
void
generate_page_map(QPDF& qpdf)
{
QPDFPageDocumentHelper dh(qpdf);
int n = 0;
for (auto const& page: dh.getAllPages()) {
page_map[page.getObjectHandle().getObjGen()] = ++n;
}
}
void
show_bookmark_details(QPDFOutlineObjectHelper outline, std::vector<int> numbers)
{
// No default so gcc will warn on missing tag
switch (style) {
case st_none:
QTC::TC("examples", "pdf-bookmarks none");
break;
case st_numbers:
QTC::TC("examples", "pdf-bookmarks numbers");
for (auto const& number: numbers) {
std::cout << number << ".";
}
std::cout << " ";
break;
case st_lines:
QTC::TC("examples", "pdf-bookmarks lines");
print_lines(numbers);
std::cout << "|" << std::endl;
print_lines(numbers);
std::cout << "+-+ ";
break;
}
if (show_open) {
int count = outline.getCount();
if (count) {
QTC::TC("examples", "pdf-bookmarks has count");
if (count > 0) {
// hierarchy is open at this point
QTC::TC("examples", "pdf-bookmarks open");
std::cout << "(v) ";
} else {
QTC::TC("examples", "pdf-bookmarks closed");
std::cout << "(>) ";
}
} else {
QTC::TC("examples", "pdf-bookmarks no count");
std::cout << "( ) ";
}
}
if (show_targets) {
QTC::TC("examples", "pdf-bookmarks targets");
std::string target = "unknown";
QPDFObjectHandle dest_page = outline.getDestPage();
if (!dest_page.isNull()) {
QTC::TC("examples", "pdf-bookmarks dest");
QPDFObjGen og = dest_page.getObjGen();
if (page_map.count(og)) {
target = std::to_string(page_map[og]);
}
}
std::cout << "[ -> " << target << " ] ";
}
std::cout << outline.getTitle() << std::endl;
}
void
extract_bookmarks(
std::vector<QPDFOutlineObjectHelper> outlines, std::vector<int>& numbers)
{
// For style == st_numbers, numbers.at(n) contains the numerical
// label for the outline, so we count up from 1.
// For style == st_lines, numbers.at(n) == 0 indicates the last
// outline at level n, and we don't otherwise care what the value
// is, so we count up to zero.
numbers.push_back(
(style == st_lines) ? -QIntC::to_int(outlines.size()) : 0);
for (auto& outline: outlines) {
++(numbers.back());
show_bookmark_details(outline, numbers);
extract_bookmarks(outline.getKids(), numbers);
}
numbers.pop_back();
}
int
main(int argc, char* argv[])
{
whoami = QUtil::getWhoami(argv[0]);
if ((argc == 2) && (strcmp(argv[1], "--version") == 0)) {
std::cout << whoami << " version 1.5" << std::endl;
exit(0);
}
int arg;
for (arg = 1; arg < argc; ++arg) {
if (argv[arg][0] == '-') {
if (strcmp(argv[arg], "--numbers") == 0) {
style = st_numbers;
} else if (strcmp(argv[arg], "--lines") == 0) {
style = st_lines;
} else if (strcmp(argv[arg], "--show-open") == 0) {
show_open = true;
} else if (strcmp(argv[arg], "--show-targets") == 0) {
show_targets = true;
} else {
usage();
}
} else {
break;
}
}
if (arg >= argc) {
usage();
}
char const* filename = argv[arg++];
char const* password = "";
if (arg < argc) {
password = argv[arg++];
}
if (arg != argc) {
usage();
}
try {
QPDF qpdf;
qpdf.processFile(filename, password);
QPDFOutlineDocumentHelper odh(qpdf);
if (odh.hasOutlines()) {
std::vector<int> numbers;
if (show_targets) {
generate_page_map(qpdf);
}
extract_bookmarks(odh.getTopLevelOutlines(), numbers);
} else {
std::cout << filename << " has no bookmarks" << std::endl;
}
} catch (std::exception& e) {
std::cerr << whoami << " processing file " << filename << ": "
<< e.what() << std::endl;
exit(2);
}
return 0;
}
|
