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
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/*
* This file is part of the libcdr project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#include <memory>
#include <string>
#include <libcdr/libcdr.h>
#include "CDRParser.h"
#include "CDRContentCollector.h"
#include "CDRStylesCollector.h"
#include "libcdr_utils.h"
#include "CDRDocumentStructure.h"
using namespace libcdr;
namespace
{
static unsigned getCDRVersion(librevenge::RVNGInputStream *input)
{
unsigned riff = readU32(input);
if ((riff & 0xffff) == 0x4c57) // "WL<micro>\0"
return 200;
if (riff != CDR_FOURCC_RIFF)
return 0;
input->seek(4, librevenge::RVNG_SEEK_CUR);
auto signature_c = (char)readU8(input);
if (signature_c != 'C' && signature_c != 'c')
return 0;
auto signature_d = (char)readU8(input);
if (signature_d != 'D' && signature_d != 'd')
return 0;
auto signature_r = (char)readU8(input);
if (signature_r != 'R' && signature_r != 'r')
return 0;
unsigned char c = readU8(input);
if (c == 0x20)
return 300;
else if (c < 0x31)
return 0;
else if (c < 0x3a)
return 100 * (c - 0x30);
else if (c < 0x41)
return 0;
return 100 * (c - 0x37);
}
} // anonymous namespace
/**
Analyzes the content of an input stream to see if it can be parsed
\param input The input stream
\return A value that indicates whether the content from the input
stream is a Corel Draw Document that libcdr is able to parse
*/
CDRAPI bool libcdr::CDRDocument::isSupported(librevenge::RVNGInputStream *input_) try
{
if (!input_)
return false;
librevenge::RVNGInputStream *tmpInput = input_;
std::shared_ptr<librevenge::RVNGInputStream> input(input_, CDRDummyDeleter());
input->seek(0, librevenge::RVNG_SEEK_SET);
unsigned version = getCDRVersion(input.get());
if (version)
return true;
if (tmpInput->isStructured())
{
input.reset(tmpInput->getSubStreamByName("content/riffData.cdr"));
if (!input)
input.reset(tmpInput->getSubStreamByName("content/root.dat"));
}
tmpInput->seek(0, librevenge::RVNG_SEEK_SET);
if (!input)
return false;
input->seek(0, librevenge::RVNG_SEEK_SET);
version = getCDRVersion(input.get());
if (!version)
return false;
return true;
}
catch (...)
{
return false;
}
/**
Parses the input stream content. It will make callbacks to the functions provided by a
CDRPaintInterface class implementation when needed. This is often commonly called the
'main parsing routine'.
\param input The input stream
\param painter A CDRPainterInterface implementation
\return A value that indicates whether the parsing was successful
*/
CDRAPI bool libcdr::CDRDocument::parse(librevenge::RVNGInputStream *input_, librevenge::RVNGDrawingInterface *painter)
{
if (!input_ || !painter)
return false;
std::shared_ptr<librevenge::RVNGInputStream> input(input_, CDRDummyDeleter());
input->seek(0, librevenge::RVNG_SEEK_SET);
bool retVal = false;
unsigned version = 0;
try
{
version = getCDRVersion(input.get());
if (version)
{
input->seek(0, librevenge::RVNG_SEEK_SET);
CDRParserState ps;
std::vector<std::unique_ptr<librevenge::RVNGInputStream>> dummyDataStreams;
CDRStylesCollector stylesCollector(ps);
CDRParser stylesParser(dummyDataStreams, &stylesCollector);
if (version >= 300)
retVal = stylesParser.parseRecords(input.get());
else
retVal = stylesParser.parseWaldo(input.get());
if (ps.m_pages.empty())
retVal = false;
if (retVal)
{
input->seek(0, librevenge::RVNG_SEEK_SET);
CDRContentCollector contentCollector(ps, painter);
CDRParser contentParser(dummyDataStreams, &contentCollector);
if (version >= 300)
retVal = contentParser.parseRecords(input.get());
else
retVal = contentParser.parseWaldo(input.get());
}
return retVal;
}
}
catch (libcdr::EndOfStreamException const &)
{
// This can only happen if isSupported() has not been called before
return false;
}
librevenge::RVNGInputStream *tmpInput = input_;
try
{
std::vector<std::string> dataFiles;
if (tmpInput->isStructured())
{
tmpInput->seek(0, librevenge::RVNG_SEEK_SET);
input.reset(tmpInput->getSubStreamByName("content/riffData.cdr"));
if (!input)
{
tmpInput->seek(0, librevenge::RVNG_SEEK_SET);
input.reset(tmpInput->getSubStreamByName("content/root.dat"));
if (input)
{
std::unique_ptr<librevenge::RVNGInputStream> tmpStream(tmpInput->getSubStreamByName("content/dataFileList.dat"));
if (bool(tmpStream))
{
std::string dataFileName;
while (!tmpStream->isEnd())
{
unsigned char character = readU8(tmpStream.get());
if (character == 0x0a)
{
dataFiles.push_back(dataFileName);
dataFileName.clear();
}
else
dataFileName += (char)character;
}
if (!dataFileName.empty())
dataFiles.push_back(dataFileName);
}
}
}
}
std::vector<std::unique_ptr<librevenge::RVNGInputStream>> dataStreams;
dataStreams.reserve(dataFiles.size());
for (const auto &dataFile : dataFiles)
{
std::string streamName("content/data/");
streamName += dataFile;
CDR_DEBUG_MSG(("Extracting stream: %s\n", streamName.c_str()));
tmpInput->seek(0, librevenge::RVNG_SEEK_SET);
std::unique_ptr<librevenge::RVNGInputStream> strm(tmpInput->getSubStreamByName(streamName.c_str()));
dataStreams.push_back(std::move(strm));
}
if (!input)
input.reset(tmpInput, CDRDummyDeleter());
CDRParserState ps;
{
// libcdr extension to the getSubStreamByName. Will extract the first stream in the
// given directory
tmpInput->seek(0, librevenge::RVNG_SEEK_SET);
std::unique_ptr<librevenge::RVNGInputStream> cmykProfile(tmpInput->getSubStreamByName("color/profiles/cmyk/"));
if (cmykProfile)
ps.setColorTransform(cmykProfile.get());
}
{
tmpInput->seek(0, librevenge::RVNG_SEEK_SET);
std::unique_ptr<librevenge::RVNGInputStream> rgbProfile(tmpInput->getSubStreamByName("color/profiles/rgb/"));
if (rgbProfile)
ps.setColorTransform(rgbProfile.get());
}
CDRStylesCollector stylesCollector(ps);
CDRParser stylesParser(dataStreams, &stylesCollector);
input->seek(0, librevenge::RVNG_SEEK_SET);
retVal = stylesParser.parseRecords(input.get());
if (ps.m_pages.empty())
retVal = false;
if (retVal)
{
input->seek(0, librevenge::RVNG_SEEK_SET);
CDRContentCollector contentCollector(ps, painter);
CDRParser contentParser(dataStreams, &contentCollector);
retVal = contentParser.parseRecords(input.get());
}
}
catch (libcdr::EndOfStreamException const &)
{
retVal = false;
}
return retVal;
}
/* vim:set shiftwidth=2 softtabstop=2 expandtab: */
|
