| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the QtQuick module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL$ |
| ** Commercial License Usage |
| ** Licensees holding valid commercial Qt licenses may use this file in |
| ** accordance with the commercial license agreement provided with the |
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| ** |
| ** GNU Lesser General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU Lesser |
| ** General Public License version 3 as published by the Free Software |
| ** Foundation and appearing in the file LICENSE.LGPL3 included in the |
| ** packaging of this file. Please review the following information to |
| ** ensure the GNU Lesser General Public License version 3 requirements |
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| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 2.0 or (at your option) the GNU General |
| ** Public license version 3 or any later version approved by the KDE Free |
| ** Qt Foundation. The licenses are as published by the Free Software |
| ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 |
| ** included in the packaging of this file. Please review the following |
| ** information to ensure the GNU General Public License requirements will |
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| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #include "qquickfontloader_p.h" |
| |
| #include <qqmlcontext.h> |
| #include <qqmlengine.h> |
| |
| #include <QStringList> |
| #include <QUrl> |
| #include <QDebug> |
| |
| #include <QFontDatabase> |
| |
| #include <private/qobject_p.h> |
| #include <qqmlinfo.h> |
| #include <qqmlfile.h> |
| |
| #if QT_CONFIG(qml_network) |
| #include <QNetworkRequest> |
| #include <QNetworkReply> |
| #endif |
| |
| #include <QtCore/QCoreApplication> |
| |
| QT_BEGIN_NAMESPACE |
| |
| #define FONTLOADER_MAXIMUM_REDIRECT_RECURSION 16 |
| |
| class QQuickFontObject : public QObject |
| { |
| Q_OBJECT |
| |
| public: |
| explicit QQuickFontObject(int _id = -1); |
| |
| #if QT_CONFIG(qml_network) |
| void download(const QUrl &url, QNetworkAccessManager *manager); |
| |
| Q_SIGNALS: |
| void fontDownloaded(const QString&, QQuickFontLoader::Status); |
| |
| private: |
| int redirectCount = 0; |
| QNetworkReply *reply = nullptr; |
| |
| private Q_SLOTS: |
| void replyFinished(); |
| #endif // qml_network |
| |
| public: |
| int id; |
| |
| Q_DISABLE_COPY(QQuickFontObject) |
| }; |
| |
| QQuickFontObject::QQuickFontObject(int _id) |
| : QObject(nullptr), id(_id) |
| { |
| } |
| |
| #if QT_CONFIG(qml_network) |
| void QQuickFontObject::download(const QUrl &url, QNetworkAccessManager *manager) |
| { |
| QNetworkRequest req(url); |
| req.setAttribute(QNetworkRequest::HttpPipeliningAllowedAttribute, true); |
| reply = manager->get(req); |
| QObject::connect(reply, SIGNAL(finished()), this, SLOT(replyFinished())); |
| } |
| |
| void QQuickFontObject::replyFinished() |
| { |
| if (reply) { |
| redirectCount++; |
| if (redirectCount < FONTLOADER_MAXIMUM_REDIRECT_RECURSION) { |
| QVariant redirect = reply->attribute(QNetworkRequest::RedirectionTargetAttribute); |
| if (redirect.isValid()) { |
| QUrl url = reply->url().resolved(redirect.toUrl()); |
| QNetworkAccessManager *manager = reply->manager(); |
| reply->deleteLater(); |
| reply = nullptr; |
| download(url, manager); |
| return; |
| } |
| } |
| redirectCount = 0; |
| |
| if (!reply->error()) { |
| id = QFontDatabase::addApplicationFontFromData(reply->readAll()); |
| if (id != -1) |
| emit fontDownloaded(QFontDatabase::applicationFontFamilies(id).at(0), QQuickFontLoader::Ready); |
| else |
| emit fontDownloaded(QString(), QQuickFontLoader::Error); |
| } else { |
| qWarning("%s: Unable to load font '%s': %s", Q_FUNC_INFO, |
| qPrintable(reply->url().toString()), qPrintable(reply->errorString())); |
| emit fontDownloaded(QString(), QQuickFontLoader::Error); |
| } |
| reply->deleteLater(); |
| reply = nullptr; |
| } |
| } |
| #endif // qml_network |
| |
| class QQuickFontLoaderPrivate : public QObjectPrivate |
| { |
| Q_DECLARE_PUBLIC(QQuickFontLoader) |
| |
| public: |
| QQuickFontLoaderPrivate() {} |
| |
| QUrl url; |
| QString name; |
| QQuickFontLoader::Status status = QQuickFontLoader::Null; |
| }; |
| |
| static void q_QFontLoaderFontsStaticReset(); |
| static void q_QFontLoaderFontsAddReset() |
| { |
| qAddPostRoutine(q_QFontLoaderFontsStaticReset); |
| } |
| class QFontLoaderFonts |
| { |
| public: |
| QFontLoaderFonts() |
| { |
| qAddPostRoutine(q_QFontLoaderFontsStaticReset); |
| qAddPreRoutine(q_QFontLoaderFontsAddReset); |
| } |
| |
| ~QFontLoaderFonts() |
| { |
| qRemovePostRoutine(q_QFontLoaderFontsStaticReset); |
| reset(); |
| } |
| |
| |
| void reset() |
| { |
| QVector<QQuickFontObject *> deleted; |
| QHash<QUrl, QQuickFontObject*>::iterator it; |
| for (it = map.begin(); it != map.end(); ++it) { |
| if (!deleted.contains(it.value())) { |
| deleted.append(it.value()); |
| delete it.value(); |
| } |
| } |
| map.clear(); |
| } |
| |
| QHash<QUrl, QQuickFontObject *> map; |
| }; |
| Q_GLOBAL_STATIC(QFontLoaderFonts, fontLoaderFonts); |
| |
| static void q_QFontLoaderFontsStaticReset() |
| { |
| fontLoaderFonts()->reset(); |
| } |
| |
| /*! |
| \qmltype FontLoader |
| \instantiates QQuickFontLoader |
| \inqmlmodule QtQuick |
| \ingroup qtquick-text-utility |
| \brief Allows fonts to be loaded by name or URL. |
| |
| The FontLoader type 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 QtQuick 2.0 |
| |
| 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 {Qt Quick Examples - Text#Fonts}{Qt Quick Examples - Text Fonts} |
| */ |
| QQuickFontLoader::QQuickFontLoader(QObject *parent) |
| : QObject(*(new QQuickFontLoaderPrivate), parent) |
| { |
| } |
| |
| QQuickFontLoader::~QQuickFontLoader() |
| { |
| } |
| |
| /*! |
| \qmlproperty url QtQuick::FontLoader::source |
| The URL of the font to load. |
| */ |
| QUrl QQuickFontLoader::source() const |
| { |
| Q_D(const QQuickFontLoader); |
| return d->url; |
| } |
| |
| void QQuickFontLoader::setSource(const QUrl &url) |
| { |
| Q_D(QQuickFontLoader); |
| if (url == d->url) |
| return; |
| d->url = url; |
| emit sourceChanged(); |
| |
| QString localFile = QQmlFile::urlToLocalFileOrQrc(d->url); |
| if (!localFile.isEmpty()) { |
| if (!fontLoaderFonts()->map.contains(d->url)) { |
| int id = QFontDatabase::addApplicationFont(localFile); |
| if (id != -1) { |
| updateFontInfo(QFontDatabase::applicationFontFamilies(id).at(0), Ready); |
| QQuickFontObject *fo = new QQuickFontObject(id); |
| fontLoaderFonts()->map[d->url] = fo; |
| } else { |
| updateFontInfo(QString(), Error); |
| } |
| } else { |
| updateFontInfo(QFontDatabase::applicationFontFamilies(fontLoaderFonts()->map.value(d->url)->id).at(0), Ready); |
| } |
| } else { |
| if (!fontLoaderFonts()->map.contains(d->url)) { |
| #if QT_CONFIG(qml_network) |
| QQuickFontObject *fo = new QQuickFontObject; |
| fontLoaderFonts()->map[d->url] = fo; |
| fo->download(d->url, qmlEngine(this)->networkAccessManager()); |
| d->status = Loading; |
| emit statusChanged(); |
| QObject::connect(fo, SIGNAL(fontDownloaded(QString,QQuickFontLoader::Status)), |
| this, SLOT(updateFontInfo(QString,QQuickFontLoader::Status))); |
| #else |
| // Silently fail if compiled with no_network |
| #endif |
| } else { |
| QQuickFontObject *fo = fontLoaderFonts()->map.value(d->url); |
| if (fo->id == -1) { |
| #if QT_CONFIG(qml_network) |
| d->status = Loading; |
| emit statusChanged(); |
| QObject::connect(fo, SIGNAL(fontDownloaded(QString,QQuickFontLoader::Status)), |
| this, SLOT(updateFontInfo(QString,QQuickFontLoader::Status))); |
| #else |
| // Silently fail if compiled with no_network |
| #endif |
| } |
| else |
| updateFontInfo(QFontDatabase::applicationFontFamilies(fo->id).at(0), Ready); |
| } |
| } |
| } |
| |
| void QQuickFontLoader::updateFontInfo(const QString& name, QQuickFontLoader::Status status) |
| { |
| Q_D(QQuickFontLoader); |
| |
| if (name != d->name) { |
| d->name = name; |
| emit nameChanged(); |
| } |
| if (status != d->status) { |
| if (status == Error) |
| qmlWarning(this) << "Cannot load font: \"" << d->url.toString() << '"'; |
| d->status = status; |
| emit statusChanged(); |
| } |
| } |
| |
| /*! |
| \qmlproperty string QtQuick::FontLoader::name |
| |
| This property holds the name of the font family. |
| It is set automatically when a font is loaded using the \l source property. |
| |
| Use this to set the \c font.family property of a \c Text item. |
| |
| Example: |
| \qml |
| Item { |
| width: 200; height: 50 |
| |
| FontLoader { |
| id: webFont |
| source: "http://www.mysite.com/myfont.ttf" |
| } |
| Text { |
| text: "Fancy font" |
| font.family: webFont.name |
| } |
| } |
| \endqml |
| */ |
| QString QQuickFontLoader::name() const |
| { |
| Q_D(const QQuickFontLoader); |
| return d->name; |
| } |
| |
| void QQuickFontLoader::setName(const QString &name) |
| { |
| Q_D(QQuickFontLoader); |
| if (d->name == name) |
| return; |
| d->name = name; |
| emit nameChanged(); |
| d->status = Ready; |
| emit statusChanged(); |
| } |
| |
| /*! |
| \qmlproperty enumeration QtQuick::FontLoader::status |
| |
| This property holds the status of font loading. It can be one of: |
| \list |
| \li FontLoader.Null - no font has been set |
| \li FontLoader.Ready - the font has been loaded |
| \li FontLoader.Loading - the font is currently being loaded |
| \li 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: |
| |
| \list |
| \li Trigger a state change: |
| \qml |
| State { name: 'loaded'; when: loader.status == FontLoader.Ready } |
| \endqml |
| |
| \li Implement an \c onStatusChanged signal handler: |
| \qml |
| FontLoader { |
| id: loader |
| onStatusChanged: if (loader.status == FontLoader.Ready) console.log('Loaded') |
| } |
| \endqml |
| |
| \li Bind to the status value: |
| \qml |
| Text { text: loader.status == FontLoader.Ready ? 'Loaded' : 'Not loaded' } |
| \endqml |
| \endlist |
| */ |
| QQuickFontLoader::Status QQuickFontLoader::status() const |
| { |
| Q_D(const QQuickFontLoader); |
| return d->status; |
| } |
| |
| QT_END_NAMESPACE |
| |
| #include <qquickfontloader.moc> |
| |
| #include "moc_qquickfontloader_p.cpp" |