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1/* This file is part of the KDE project
2 Copyright (C) 2001 Simon Hausmann <hausmann@kde.org>
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17
18 As a special exception this program may be linked with Qt non-commercial
19 edition, the resulting executable be distributed, without including the
20 source code for the Qt non-commercial edition in the source distribution.
21
22*/
23
24
25#include "xmltree.h"
26
27#include <qxml.h>
28
29#include <assert.h>
30
31XMLElement::XMLElement()
32 : m_parent( 0 ), m_next( 0 ), m_prev( 0 ), m_first( 0 ), m_last( 0 )
33{
34}
35
36XMLElement::~XMLElement()
37{
38 XMLElement *n = m_first;
39
40 while ( n )
41 {
42 XMLElement *tmp = n;
43 n = n->m_next;
44 delete tmp;
45 }
46}
47
48void XMLElement::appendChild( XMLElement *child )
49{
50 if ( child->m_parent )
51 child->m_parent->removeChild( child );
52
53 child->m_parent = this;
54
55 if ( m_last )
56 m_last->m_next = child;
57
58 child->m_prev = m_last;
59
60 if ( !m_first )
61 m_first = child;
62
63 m_last = child;
64}
65
66void XMLElement::insertAfter( XMLElement *newChild, XMLElement *refChild )
67{
68 assert( newChild != refChild );
69
70 if ( refChild == m_last )
71 {
72 appendChild( newChild );
73 return;
74 }
75
76 assert( refChild );
77 assert( refChild->m_parent );
78 assert( refChild->m_parent == this );
79
80 if ( newChild->m_parent && newChild != refChild )
81 newChild->m_parent->removeChild( newChild );
82
83 newChild->m_parent = this;
84
85 XMLElement *next = refChild->m_next;
86
87 refChild->m_next = newChild;
88
89 newChild->m_prev = refChild;
90 newChild->m_next = next;
91
92 if ( next )
93 next->m_prev = newChild;
94}
95
96void XMLElement::insertBefore( XMLElement *newChild, XMLElement *refChild )
97{
98 assert( refChild );
99 assert( refChild->m_parent );
100 assert( refChild->m_parent == this );
101 assert( newChild != refChild );
102
103 if ( newChild->m_parent && newChild != refChild )
104 newChild->m_parent->removeChild( newChild );
105
106 newChild->m_parent = this;
107
108 XMLElement *prev = refChild->m_prev;
109
110 refChild->m_prev = newChild;
111
112 newChild->m_prev = prev;
113 newChild->m_next = refChild;
114
115 if ( prev )
116 prev->m_next = newChild;
117
118 if ( refChild == m_first )
119 m_first = newChild;
120}
121
122void XMLElement::removeChild( XMLElement *child )
123{
124 if ( child->m_parent != this )
125 return;
126
127 if ( m_first == child )
128 m_first = child->m_next;
129
130 if ( m_last == child )
131 m_last = child->m_prev;
132
133 if ( child->m_prev )
134 child->m_prev->m_next = child->m_next;
135
136 if ( child->m_next )
137 child->m_next->m_prev = child->m_prev;
138
139 child->m_parent = 0;
140 child->m_prev = 0;
141 child->m_next = 0;
142}
143
144void XMLElement::save( QTextStream &s, uint indent )
145{
146 if ( !m_value.isEmpty() )
147 {
148 s << encodeAttr( m_value );
149 return;
150 }
151
152 for ( uint i = 0; i < indent; ++i )
153 s << " ";
154
155 s << "<" << m_tag;
156
157 if ( !m_attributes.isEmpty() )
158 {
159 s << " ";
160 AttributeMap::ConstIterator it = m_attributes.begin();
161 AttributeMap::ConstIterator end = m_attributes.end();
162 for (; it != end; ++it )
163 {
164 s << it.key() << "=\"" << encodeAttr( it.data() ) << "\"";
165 s << " ";
166 }
167 }
168
169 if ( m_last )
170 {
171 if ( ( m_first && !m_first->value().isEmpty() ) || !m_parent )
172 s << ">";
173 else
174 s << ">" << endl;
175
176 int newIndent = indent;
177 if ( m_parent )
178 newIndent++;
179
180 XMLElement *n = m_first;
181 while ( n )
182 {
183 n->save( s, newIndent );
184 n = n->nextChild();
185 }
186
187 if ( m_last && m_last->value().isEmpty() && m_parent )
188 for ( uint i = 0; i < indent; ++i )
189 s << " ";
190
191 if ( m_parent )
192 s << "</" << m_tag << ">" << endl;
193 }
194 else
195 s << "/>" << endl;
196}
197/**
198 Encode an attribute value upon saving.
199 replaces '"' with "&quot"
200 replaces '<' with "&lt"
201 replaces '&' with "&amp"
202 replaces '>' with "&gt"
203*/
204QString XMLElement::encodeAttr( const QString& str )
205{
206 QString encAttr( str ); // cause of the const parameter
207 encAttr = encAttr.replace( QRegExp( "[<]" ), "&lt" );
208 encAttr = encAttr.replace( QRegExp( "[>]" ), "&gt" );
209 encAttr = encAttr.replace( QRegExp( "[\"]" ), "&quot" );
210 encAttr = encAttr.replace( QRegExp( "[&]" ), "&amp" );
211 return encAttr;
212}
213
214class Handler : public QXmlDefaultHandler
215{
216public:
217 Handler() : m_node( 0 ), m_root( 0 ) {}
218
219 XMLElement *root() const { return m_root; }
220
221 virtual bool startDocument();
222 virtual bool endDocument();
223 virtual bool startElement( const QString &ns, const QString &ln, const QString &qName,
224 const QXmlAttributes &attr );
225 virtual bool endElement( const QString &ns, const QString &ln, const QString &qName );
226 virtual bool characters( const QString &ch );
227
228private:
229 XMLElement *m_node;
230 XMLElement *m_root;
231};
232
233bool Handler::startDocument()
234{
235 m_root = m_node = new XMLElement;
236
237 return true;
238}
239
240bool Handler::endDocument()
241{
242 return m_root == m_node;
243}
244
245bool Handler::startElement( const QString &, const QString &, const QString &qName,
246 const QXmlAttributes &attr )
247{
248 XMLElement *bm = new XMLElement;
249
250 XMLElement::AttributeMap attributes;
251 for ( int i = 0; i < attr.length(); ++i )
252 attributes[ attr.qName( i ) ] = attr.value( i );
253
254 bm->setAttributes( attributes );
255
256 bm->setTagName( qName );
257
258 m_node->appendChild( bm );
259 m_node = bm;
260
261 return true;
262}
263
264bool Handler::endElement( const QString &, const QString &, const QString & )
265{
266 if ( m_node == m_root )
267 return false;
268
269 m_node = m_node->parent();
270 return true;
271}
272
273bool Handler::characters( const QString &ch )
274{
275 XMLElement *textNode = new XMLElement;
276 textNode->setValue( ch );
277 m_node->appendChild( textNode );
278 return true;
279}
280
281XMLElement *XMLElement::namedItem( const QString &name )
282{
283 XMLElement *e = m_first;
284
285 for (; e; e = e->nextChild() )
286 if ( e->tagName() == name )
287 return e;
288
289 return 0;
290}
291
292XMLElement *XMLElement::clone() const
293{
294 XMLElement *res = new XMLElement;
295
296 res->setTagName( m_tag );
297 res->setValue( m_value );
298 res->setAttributes( m_attributes );
299
300 XMLElement *e = m_first;
301 for (; e; e = e->m_next )
302 res->appendChild( e->clone() );
303
304 return res;
305}
306
307XMLElement *XMLElement::load( const QString &fileName )
308{
309 QFile f( fileName );
310 if ( !f.open( IO_ReadOnly ) )
311 return 0;
312
313 QTextStream stream( &f );
314 stream.setEncoding( QTextStream::UnicodeUTF8 );
315 QXmlInputSource src( stream );
316 QXmlSimpleReader reader;
317 Handler handler;
318
319 reader.setFeature( "http://trolltech.com/xml/features/report-whitespace-only-CharData", false );
320 reader.setContentHandler( &handler );
321 reader.parse( src );
322
323 return handler.root();;
324}