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
232
233
234
235
236
237
238
239
240
241
|
/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtDeclarative module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qdeclarativefontloader_p.h"
#include <qdeclarativecontext.h>
#include <qdeclarativeengine.h>
#include <QStringList>
#include <QUrl>
#include <QDebug>
#include <QNetworkRequest>
#include <QNetworkReply>
#include <QFile>
#include <QFontDatabase>
#include <private/qobject_p.h>
QT_BEGIN_NAMESPACE
class QDeclarativeFontLoaderPrivate : public QObjectPrivate
{
Q_DECLARE_PUBLIC(QDeclarativeFontLoader)
public:
QDeclarativeFontLoaderPrivate() : reply(0), status(QDeclarativeFontLoader::Null) {}
void addFontToDatabase(const QByteArray &);
QUrl url;
QString name;
QNetworkReply *reply;
QDeclarativeFontLoader::Status status;
};
/*!
\qmlclass FontLoader QDeclarativeFontLoader
\since 4.7
\ingroup group_utility
\brief This item allows using fonts by name or url.
Example:
\qml
FontLoader { id: fixedFont; name: "Courier" }
FontLoader { id: webFont; source: "http://www.mysite.com/myfont.ttf" }
Text { text: "Fixed-size font"; font.family: fixedFont.name }
Text { text: "Fancy font"; font.family: webFont.name }
\endqml
*/
QDeclarativeFontLoader::QDeclarativeFontLoader(QObject *parent)
: QObject(*(new QDeclarativeFontLoaderPrivate), parent)
{
}
QDeclarativeFontLoader::~QDeclarativeFontLoader()
{
}
static QString toLocalFileOrQrc(const QUrl& url)
{
QString r = url.toLocalFile();
if (r.isEmpty() && url.scheme() == QLatin1String("qrc"))
r = QLatin1Char(':') + url.path();
return r;
}
/*!
\qmlproperty url FontLoader::source
The url of the font to load.
*/
QUrl QDeclarativeFontLoader::source() const
{
Q_D(const QDeclarativeFontLoader);
return d->url;
}
void QDeclarativeFontLoader::setSource(const QUrl &url)
{
Q_D(QDeclarativeFontLoader);
if (url == d->url)
return;
d->url = qmlContext(this)->resolvedUrl(url);
d->status = Loading;
emit statusChanged();
#ifndef QT_NO_LOCALFILE_OPTIMIZED_QML
QString lf = toLocalFileOrQrc(d->url);
if (!lf.isEmpty()) {
int id = QFontDatabase::addApplicationFont(lf);
if (id != -1) {
d->name = QFontDatabase::applicationFontFamilies(id).at(0);
emit nameChanged();
d->status = QDeclarativeFontLoader::Ready;
} else {
d->status = QDeclarativeFontLoader::Error;
qWarning() << "Cannot load font:" << url;
}
emit statusChanged();
} else
#endif
{
QNetworkRequest req(d->url);
req.setAttribute(QNetworkRequest::HttpPipeliningAllowedAttribute, true);
d->reply = qmlEngine(this)->networkAccessManager()->get(req);
QObject::connect(d->reply, SIGNAL(finished()), this, SLOT(replyFinished()));
}
}
/*!
\qmlproperty string FontLoader::name
This property holds the name of the font family.
It is set automatically when a font is loaded using the \c url property.
Use this to set the \c font.family property of a \c Text item.
Example:
\qml
FontLoader { id: webFont; source: "http://www.mysite.com/myfont.ttf" }
Text { text: "Fancy font"; font.family: webFont.name }
\endqml
*/
QString QDeclarativeFontLoader::name() const
{
Q_D(const QDeclarativeFontLoader);
return d->name;
}
void QDeclarativeFontLoader::setName(const QString &name)
{
Q_D(QDeclarativeFontLoader);
if (d->name == name )
return;
d->name = name;
emit nameChanged();
d->status = Ready;
emit statusChanged();
}
/*!
\qmlproperty enum FontLoader::status
This property holds the status of font loading. It can be one of:
\list
\o Null - no font has been set
\o Ready - the font has been loaded
\o Loading - the font is currently being loaded
\o Error - an error occurred while loading the font
\endlist
Note that a change in the status property does not cause anything to happen
(although it reflects what has happened to the font loader internally). If you wish
to react to the change in status you need to do it yourself, for example in one
of the following ways:
\list
\o Create a state, so that a state change occurs, e.g. State{name: 'loaded'; when: loader.status = FontLoader.Ready;}
\o Do something inside the onStatusChanged signal handler, e.g. FontLoader{id: loader; onStatusChanged: if(loader.status == FontLoader.Ready) console.log('Loaded');}
\o Bind to the status variable somewhere, e.g. Text{text: if(loader.status!=FontLoader.Ready){'Not Loaded';}else{'Loaded';}}
\endlist
*/
QDeclarativeFontLoader::Status QDeclarativeFontLoader::status() const
{
Q_D(const QDeclarativeFontLoader);
return d->status;
}
void QDeclarativeFontLoader::replyFinished()
{
Q_D(QDeclarativeFontLoader);
if (d->reply) {
if (!d->reply->error()) {
QByteArray ba = d->reply->readAll();
d->addFontToDatabase(ba);
} else {
d->status = Error;
emit statusChanged();
}
d->reply->deleteLater();
d->reply = 0;
}
}
void QDeclarativeFontLoaderPrivate::addFontToDatabase(const QByteArray &ba)
{
Q_Q(QDeclarativeFontLoader);
int id = QFontDatabase::addApplicationFontFromData(ba);
if (id != -1) {
name = QFontDatabase::applicationFontFamilies(id).at(0);
emit q->nameChanged();
status = QDeclarativeFontLoader::Ready;
} else {
status = QDeclarativeFontLoader::Error;
qWarning() << "Cannot load font:" << url;
}
emit q->statusChanged();
}
QT_END_NAMESPACE
|
