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Diffstat (limited to 'src/declarative/util/qmlfontloader.cpp')
| -rw-r--r-- | src/declarative/util/qmlfontloader.cpp | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/src/declarative/util/qmlfontloader.cpp b/src/declarative/util/qmlfontloader.cpp new file mode 100644 index 0000000..b56043b --- /dev/null +++ b/src/declarative/util/qmlfontloader.cpp @@ -0,0 +1,229 @@ +/**************************************************************************** +** +** Copyright (C) 2009 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 "qmlfontloader_p.h" + +#include <qmlcontext.h> +#include <qmlengine.h> + +#include <QUrl> +#include <QDebug> +#include <QNetworkRequest> +#include <QNetworkReply> +#include <QFile> +#include <QFontDatabase> + +#include <private/qobject_p.h> + +QT_BEGIN_NAMESPACE + +class QmlFontLoaderPrivate : public QObjectPrivate +{ + Q_DECLARE_PUBLIC(QmlFontLoader) + +public: + QmlFontLoaderPrivate() : reply(0), status(QmlFontLoader::Null) {} + + void addFontToDatabase(const QByteArray &); + + QUrl url; + QString name; + QNetworkReply *reply; + QmlFontLoader::Status status; +}; + +QML_DEFINE_TYPE(Qt,4,6,FontLoader,QmlFontLoader) + +/*! + \qmlclass FontLoader QmlFontLoader + \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 +*/ +QmlFontLoader::QmlFontLoader(QObject *parent) + : QObject(*(new QmlFontLoaderPrivate), parent) +{ +} + +QmlFontLoader::~QmlFontLoader() +{ +} + +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 QmlFontLoader::source() const +{ + Q_D(const QmlFontLoader); + return d->url; +} + +void QmlFontLoader::setSource(const QUrl &url) +{ + Q_D(QmlFontLoader); + 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 = QmlFontLoader::Ready; + } else { + d->status = QmlFontLoader::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 QmlFontLoader::name() const +{ + Q_D(const QmlFontLoader); + return d->name; +} + +void QmlFontLoader::setName(const QString &name) +{ + Q_D(QmlFontLoader); + 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 +*/ +QmlFontLoader::Status QmlFontLoader::status() const +{ + Q_D(const QmlFontLoader); + return d->status; +} + +void QmlFontLoader::replyFinished() +{ + Q_D(QmlFontLoader); + 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 QmlFontLoaderPrivate::addFontToDatabase(const QByteArray &ba) +{ + Q_Q(QmlFontLoader); + + int id = QFontDatabase::addApplicationFontFromData(ba); + if (id != -1) { + name = QFontDatabase::applicationFontFamilies(id).at(0); + emit q->nameChanged(); + status = QmlFontLoader::Ready; + } else { + status = QmlFontLoader::Error; + qWarning() << "Cannot load font:" << url; + } + emit q->statusChanged(); +} + +QT_END_NAMESPACE |