/**************************************************************************** ** ** 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 "private/qdeclarativefontloader_p.h" #include #include #include #include #include #include #include #include #include #include #include #include QT_BEGIN_NAMESPACE class QDeclarativeFontLoaderPrivate : public QObjectPrivate { Q_DECLARE_PUBLIC(QDeclarativeFontLoader) public: QDeclarativeFontLoaderPrivate() : reply(0), status(QDeclarativeFontLoader::Null), redirectCount(0) {} void addFontToDatabase(const QByteArray &); QUrl url; QString name; QNetworkReply *reply; QDeclarativeFontLoader::Status status; int redirectCount; }; /*! \qmlclass FontLoader QDeclarativeFontLoader \ingroup qml-utility-elements \since 4.7 \brief The FontLoader element allows fonts to be loaded by name or URL. The FontLoader element is used to load fonts by name or URL. The \l status indicates when the font has been loaded, which is useful for fonts loaded from remote sources. For example: \qml import Qt 4.7 Column { 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 \sa {declarative/text/fonts}{Fonts example} */ QDeclarativeFontLoader::QDeclarativeFontLoader(QObject *parent) : QObject(*(new QDeclarativeFontLoaderPrivate), parent) { } QDeclarativeFontLoader::~QDeclarativeFontLoader() { } /*! \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(); emit sourceChanged(); #ifndef QT_NO_LOCALFILE_OPTIMIZED_QML QString lf = QDeclarativeEnginePrivate::urlToLocalFileOrQrc(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; qmlInfo(this) << "Cannot load font: \"" << url.toString() << "\""; } 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 enumeration FontLoader::status This property holds the status of font loading. It can be one of: \list \o FontLoader.Null - no font has been set \o FontLoader.Ready - the font has been loaded \o FontLoader.Loading - the font is currently being loaded \o FontLoader.Error - an error occurred while loading the font \endlist Use this status to provide an update or respond to the status change in some way. For example, you could: \e {Trigger a state change:} \qml State { name: 'loaded'; when: loader.status = FontLoader.Ready } \endqml \e {Implement an \c onStatusChanged signal handler:} \qml FontLoader { id: loader onStatusChanged: if (loader.status == FontLoader.Ready) console.log('Loaded') } \endqml \e {Bind to the status value:} \qml Text { text: loader.status != FontLoader.Ready ? 'Not Loaded' : 'Loaded' } \endqml */ QDeclarativeFontLoader::Status QDeclarativeFontLoader::status() const { Q_D(const QDeclarativeFontLoader); return d->status; } #define FONTLOADER_MAXIMUM_REDIRECT_RECURSION 16 void QDeclarativeFontLoader::replyFinished() { Q_D(QDeclarativeFontLoader); if (d->reply) { d->redirectCount++; if (d->redirectCount < FONTLOADER_MAXIMUM_REDIRECT_RECURSION) { QVariant redirect = d->reply->attribute(QNetworkRequest::RedirectionTargetAttribute); if (redirect.isValid()) { QUrl url = d->reply->url().resolved(redirect.toUrl()); d->reply->deleteLater(); d->reply = 0; setSource(url); return; } } d->redirectCount=0; if (!d->reply->error()) { QByteArray ba = d->reply->readAll(); d->addFontToDatabase(ba); } else { d->status = Error; qmlInfo(this) << "Cannot load font: \"" << d->reply->url().toString() << "\""; 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; qmlInfo(q) << "Cannot load font: \"" << url.toString() << "\""; } emit q->statusChanged(); } QT_END_NAMESPACE