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
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* libvisio
* Version: MPL 1.1 / GPLv2+ / LGPLv2+
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License or as specified alternatively below. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* Major Contributor(s):
* Copyright (C) 2011 Fridrich Strba <fridrich.strba@bluewin.ch>
* Copyright (C) 2011 Eilidh McAdam <tibbylickle@gmail.com>
*
*
* All Rights Reserved.
*
* For minor contributions see the git repository.
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPLv2+"), or
* the GNU Lesser General Public License Version 2 or later (the "LGPLv2+"),
* in which case the provisions of the GPLv2+ or the LGPLv2+ are applicable
* instead of those above.
*/
#include <libwpd-stream/libwpd-stream.h>
#include <sstream>
#include <string>
#include "libvisio.h"
#include "libvisio_utils.h"
#include "VSDSVGGenerator.h"
#include "VSDXParser.h"
#include "VSD6Parser.h"
#include "VSD11Parser.h"
/**
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 Visio Document that libvisio able to parse
*/
bool libvisio::VisioDocument::isSupported(WPXInputStream *input)
{
WPXInputStream *tmpDocStream = input->getDocumentOLEStream("VisioDocument");
if (!tmpDocStream)
return false;
tmpDocStream->seek(0x1A, WPX_SEEK_SET);
unsigned char version = readU8(tmpDocStream);
delete tmpDocStream;
VSD_DEBUG_MSG(("VisioDocument: version %i\n", version));
// Versions 2k (6) and 2k3 (11)
if (version == 6 || version == 11)
{
return true;
}
return false;
}
/**
Parses the input stream content. It will make callbacks to the functions provided by a
WPGPaintInterface class implementation when needed. This is often commonly called the
'main parsing routine'.
\param input The input stream
\param painter A WPGPainterInterface implementation
\return A value that indicates whether the parsing was successful
*/
bool libvisio::VisioDocument::parse(::WPXInputStream *input, libwpg::WPGPaintInterface *painter)
{
WPXInputStream *docStream = input->getDocumentOLEStream("VisioDocument");
if (!docStream)
{
return false;
}
docStream->seek(0x1A, WPX_SEEK_SET);
unsigned char version = readU8(docStream);
VSDXParser *parser;
switch(version)
{
case 6:
parser = new VSD6Parser(docStream, painter);
break;
case 11:
parser = new VSD11Parser(docStream, painter);
break;
default:
return false;
}
if (parser)
{
parser->parseMain();
}
else
{
delete docStream;
return false;
}
delete parser;
delete docStream;
return true;
}
/**
Parses the input stream content and generates a valid Scalable Vector Graphics
Provided as a convenience function for applications that support SVG internally.
\param input The input stream
\param output The output string whose content is the resulting SVG
\return A value that indicates whether the SVG generation was successful.
*/
bool libvisio::VisioDocument::generateSVG(::WPXInputStream *input, WPXString &output)
{
std::ostringstream tmpOutputStream;
libvisio::VSDSVGGenerator generator(tmpOutputStream);
bool result = libvisio::VisioDocument::parse(input, &generator);
if (result)
output = WPXString(tmpOutputStream.str().c_str());
else
output = WPXString("");
return result;
}
/* vim:set shiftwidth=2 softtabstop=2 expandtab: */
|
