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
|
/*************************************************************************
** XMLDocument.cpp **
** **
** This file is part of dvisvgm -- the DVI to SVG converter **
** Copyright (C) 2005-2011 Martin Gieseking <martin.gieseking@uos.de> **
** **
** This program is free software; you can redistribute it and/or **
** modify it under the terms of the GNU General Public License as **
** published by the Free Software Foundation; either version 3 of **
** the License, or (at your option) any later version. **
** **
** This program is distributed in the hope that it will be useful, but **
** WITHOUT ANY WARRANTY; without even the implied warranty of **
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the **
** GNU General Public License for more details. **
** **
** You should have received a copy of the GNU General Public License **
** along with this program; if not, see <http://www.gnu.org/licenses/>. **
*************************************************************************/
#include "macros.h"
#include "XMLDocument.h"
using namespace std;
XMLDocument::XMLDocument (XMLElementNode *root)
: rootElement(root), emitted(false)
{
}
XMLDocument::~XMLDocument () {
clear();
}
void XMLDocument::clear () {
delete rootElement;
rootElement = 0;
FORALL(nodes, list<XMLNode*>::iterator, i)
delete *i;
nodes.clear();
}
void XMLDocument::append (XMLNode *node) {
if (!node)
return;
XMLElementNode *newRoot = dynamic_cast<XMLElementNode*>(node);
if (newRoot) { // there can only be one root element node in the document
delete rootElement; // so if there is already one...
rootElement = newRoot; // ...we replace it
}
else
nodes.push_back(node);
}
void XMLDocument::setRootNode (XMLElementNode *root) {
delete rootElement;
rootElement = root;
}
ostream& XMLDocument::write (ostream &os) const {
if (rootElement) { // no root element => no output
os << "<?xml version='1.0' encoding='ISO-8859-1'?>\n";
FORALL(nodes, list<XMLNode*>::const_iterator, i)
(*i)->write(os);
rootElement->write(os);
}
return os;
}
/** Writes a part of the XML document to the given output stream and removes
* the completely written nodes. The output stops when a stop node is reached
* (this node won't be printed at all). If a node was only partly emitted, i.e.
* its child was the stop node, a further call of emit will continue the output.
* @param[in] os stream to which the output is written
* @param[in] stopElement node where emitting stops (if 0 the whole tree will be emitted)
* @return true if node was completely emitted */
bool XMLDocument::emit (ostream& os, XMLNode *stopNode) {
if (rootElement) { // no root element => no output
if (!emitted) {
os << "<?xml version='1.0' encoding='ISO-8859-1'?>\n";
emitted = true;
}
FORALL(nodes, list<XMLNode*>::iterator, i) {
if ((*i)->emit(os, stopNode)) {
list<XMLNode*>::iterator it = i++; // prevent i from being invalidated...
nodes.erase(it); // ... by erase
--i; // @@ what happens if i points to first child?
}
else
return false;
}
return rootElement->emit(os, stopNode);
}
return true;
}
|
