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comparison demos/browser/xbel.d @ 45:71b382c10ef6

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add coarse and incomplete QT browser port
author mandel
date Sun, 17 May 2009 18:49:59 +0000
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children 7bfd46c330dc
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44:3cb15c92ac28 45:71b382c10ef6
1 /****************************************************************************
2 **
3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
4 ** Contact: Qt Software Information (qt-info@nokia.com)
5 **
6 ** This file is part of the demonstration applications of the Qt Toolkit.
7 **
8 ** $QT_BEGIN_LICENSE:LGPL$
9 ** Commercial Usage
10 ** Licensees holding valid Qt Commercial licenses may use this file in
11 ** accordance with the Qt Commercial License Agreement provided with the
12 ** Software or, alternatively, in accordance with the terms contained in
13 ** a written agreement between you and Nokia.
14 **
15 ** GNU Lesser General Public License Usage
16 ** Alternatively, this file may be used under the terms of the GNU Lesser
17 ** General Public License version 2.1 as published by the Free Software
18 ** Foundation and appearing in the file LICENSE.LGPL included in the
19 ** packaging of this file. Please review the following information to
20 ** ensure the GNU Lesser General Public License version 2.1 requirements
21 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
22 **
23 ** In addition, as a special exception, Nokia gives you certain
24 ** additional rights. These rights are described in the Nokia Qt LGPL
25 ** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
26 ** package.
27 **
28 ** GNU General Public License Usage
29 ** Alternatively, this file may be used under the terms of the GNU
30 ** General Public License version 3.0 as published by the Free Software
31 ** Foundation and appearing in the file LICENSE.GPL included in the
32 ** packaging of this file. Please review the following information to
33 ** ensure the GNU General Public License version 3.0 requirements will be
34 ** met: http://www.gnu.org/copyleft/gpl.html.
35 **
36 ** If you are unsure which license is appropriate for your use, please
37 ** contact the sales department at qt-sales@nokia.com.
38 ** $QT_END_LICENSE$
39 **
40 ****************************************************************************/
41
42 module xbel;
43
44 import QtCore.QXmlStreamReader;
45 import QtCore.QDateTime;
46
47
48 import QtCore.QFile;
49
50 class BookmarkNode
51 {
52 public:
53 enum Type {
54 Root,
55 Folder,
56 Bookmark,
57 Separator
58 };
59
60 this(Type type = Root, BookmarkNode *parent = null)
61 {
62 expanded = false;
63 m_parent = parent;
64 m_type = type;
65
66 if (parent)
67 parent.add(this);
68 }
69
70 ~this()
71 {
72 if (m_parent)
73 m_parent.remove(this);
74 qDeleteAll(m_children);
75 m_parent = 0;
76 m_type = BookmarkNode::Root;
77 }
78
79 bool operator==(const BookmarkNode &other)
80 {
81 if (url != other.url
82 || title != other.title
83 || desc != other.desc
84 || expanded != other.expanded
85 || m_type != other.m_type
86 || m_children.count() != other.m_children.count())
87 return false;
88
89 for (int i = 0; i < m_children.count(); ++i)
90 if (!((*(m_children[i])) == (*(other.m_children[i]))))
91 return false;
92 return true;
93 }
94
95 Type type() const
96 {
97 return m_type;
98 }
99
100 void setType(Type type)
101 {
102 m_type = type;
103 }
104
105 QList<BookmarkNode *> children() const
106 {
107 return m_children;
108 }
109
110
111 BookmarkNode *parent() const
112 {
113 return m_parent;
114 }
115
116 void add(BookmarkNode *child, int offset = -1)
117 {
118 Q_ASSERT(child.m_type != Root);
119 if (child.m_parent)
120 child.m_parent.remove(child);
121 child.m_parent = this;
122 if (-1 == offset)
123 offset = m_children.size();
124 m_children.insert(offset, child);
125 }
126
127 void remove(BookmarkNode *child)
128 {
129 child.m_parent = 0;
130 m_children.removeAll(child);
131 }
132
133 QString url;
134 QString title;
135 QString desc;
136 bool expanded;
137
138 private:
139 BookmarkNode *m_parent;
140 Type m_type;
141 QList<BookmarkNode *> m_children;
142
143 };
144
145 class XbelReader : public QXmlStreamReader
146 {
147 public:
148 this()
149 {
150 }
151
152 BookmarkNode *read(const QString &fileName)
153 {
154 QFile file(fileName);
155 if (!file.exists()) {
156 return new BookmarkNode(BookmarkNode::Root);
157 }
158 file.open(QFile::ReadOnly);
159 return read(&file);
160 }
161
162 BookmarkNode *read(QIODevice *device)
163 {
164 BookmarkNode *root = new BookmarkNode(BookmarkNode::Root);
165 setDevice(device);
166 while (!atEnd()) {
167 readNext();
168 if (isStartElement()) {
169 QString version = attributes().value(QLatin1String("version")).toString();
170 if (name() == QLatin1String("xbel")
171 && (version.isEmpty() || version == QLatin1String("1.0"))) {
172 readXBEL(root);
173 } else {
174 raiseError(QObject::tr("The file is not an XBEL version 1.0 file."));
175 }
176 }
177 }
178 return root;
179 }
180
181 private:
182 void skipUnknownElement()
183 {
184 Q_ASSERT(isStartElement());
185
186 while (!atEnd()) {
187 readNext();
188
189 if (isEndElement())
190 break;
191
192 if (isStartElement())
193 skipUnknownElement();
194 }
195 }
196
197 void readXBEL(BookmarkNode *parent)
198 {
199 Q_ASSERT(isStartElement() && name() == QLatin1String("xbel"));
200
201 while (!atEnd()) {
202 readNext();
203 if (isEndElement())
204 break;
205
206 if (isStartElement()) {
207 if (name() == QLatin1String("folder"))
208 readFolder(parent);
209 else if (name() == QLatin1String("bookmark"))
210 readBookmarkNode(parent);
211 else if (name() == QLatin1String("separator"))
212 readSeparator(parent);
213 else
214 skipUnknownElement();
215 }
216 }
217 }
218
219 void readTitle(BookmarkNode *parent)
220 {
221 Q_ASSERT(isStartElement() && name() == QLatin1String("title"));
222 parent.title = readElementText();
223 }
224
225 void readDescription(BookmarkNode *parent)
226 {
227 Q_ASSERT(isStartElement() && name() == QLatin1String("desc"));
228 parent.desc = readElementText();
229 }
230
231 void readSeparator(BookmarkNode *parent)
232 {
233 new BookmarkNode(BookmarkNode::Separator, parent);
234 // empty elements have a start and end element
235 readNext();
236 }
237
238
239 void readFolder(BookmarkNode *parent)
240 {
241 Q_ASSERT(isStartElement() && name() == QLatin1String("folder"));
242
243 BookmarkNode *folder = new BookmarkNode(BookmarkNode::Folder, parent);
244 folder.expanded = (attributes().value(QLatin1String("folded")) == QLatin1String("no"));
245
246 while (!atEnd()) {
247 readNext();
248
249 if (isEndElement())
250 break;
251
252 if (isStartElement()) {
253 if (name() == QLatin1String("title"))
254 readTitle(folder);
255 else if (name() == QLatin1String("desc"))
256 readDescription(folder);
257 else if (name() == QLatin1String("folder"))
258 readFolder(folder);
259 else if (name() == QLatin1String("bookmark"))
260 readBookmarkNode(folder);
261 else if (name() == QLatin1String("separator"))
262 readSeparator(folder);
263 else
264 skipUnknownElement();
265 }
266 }
267 }
268
269 void readBookmarkNode(BookmarkNode *parent)
270 {
271 Q_ASSERT(isStartElement() && name() == QLatin1String("bookmark"));
272 BookmarkNode *bookmark = new BookmarkNode(BookmarkNode::Bookmark, parent);
273 bookmark.url = attributes().value(QLatin1String("href")).toString();
274 while (!atEnd()) {
275 readNext();
276 if (isEndElement())
277 break;
278
279 if (isStartElement()) {
280 if (name() == QLatin1String("title"))
281 readTitle(bookmark);
282 else if (name() == QLatin1String("desc"))
283 readDescription(bookmark);
284 else
285 skipUnknownElement();
286 }
287 }
288 if (bookmark.title.isEmpty())
289 bookmark.title = QObject::tr("Unknown title");
290 }
291
292 };
293
294 import QtCore.QXmlStreamWriter;
295
296 class XbelWriter : public QXmlStreamWriter
297 {
298 public:
299 this()
300 {
301 setAutoFormatting(true);
302 }
303 bool write(const QString &fileName, const BookmarkNode *root);
304 {
305 QFile file(fileName);
306 if (!root || !file.open(QFile::WriteOnly))
307 return false;
308 return write(&file, root);
309 }
310
311 bool write(QIODevice *device, const BookmarkNode *root);
312 {
313 setDevice(device);
314
315 writeStartDocument();
316 writeDTD(QLatin1String("<!DOCTYPE xbel>"));
317 writeStartElement(QLatin1String("xbel"));
318 writeAttribute(QLatin1String("version"), QLatin1String("1.0"));
319 if (root.type() == BookmarkNode::Root) {
320 for (int i = 0; i < root.children().count(); ++i)
321 writeItem(root.children().at(i));
322 } else {
323 writeItem(root);
324 }
325
326 writeEndDocument();
327 return true;
328 }
329
330
331 private:
332 void writeItem(const BookmarkNode *parent)
333 {
334 switch (parent.type()) {
335 case BookmarkNode::Folder:
336 writeStartElement(QLatin1String("folder"));
337 writeAttribute(QLatin1String("folded"), parent.expanded ? QLatin1String("no") : QLatin1String("yes"));
338 writeTextElement(QLatin1String("title"), parent.title);
339 for (int i = 0; i < parent.children().count(); ++i)
340 writeItem(parent.children().at(i));
341 writeEndElement();
342 break;
343 case BookmarkNode::Bookmark:
344 writeStartElement(QLatin1String("bookmark"));
345 if (!parent.url.isEmpty())
346 writeAttribute(QLatin1String("href"), parent.url);
347 writeTextElement(QLatin1String("title"), parent.title);
348 if (!parent.desc.isEmpty())
349 writeAttribute(QLatin1String("desc"), parent.desc);
350 writeEndElement();
351 break;
352 case BookmarkNode::Separator:
353 writeEmptyElement(QLatin1String("separator"));
354 break;
355 default:
356 break;
357 }
358 }
359 }