124 lines
4.3 KiB
C++
124 lines
4.3 KiB
C++
/* === This file is part of Calamares - <http://github.com/calamares> ===
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*
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* Copyright 2015, Teo Mrnjavac <teo@kde.org>
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*
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* Based on KPluginFactory from KCoreAddons, KDE project
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* Copyright 2007, Matthias Kretz <kretz@kde.org>
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* Copyright 2007, Bernhard Loos <nhuh.put@web.de>
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*
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* Calamares is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Calamares is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Calamares. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "PluginFactory.h"
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#include "PluginFactory_p.h"
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#include <QObjectCleanupHandler>
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#include <QDebug>
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Q_GLOBAL_STATIC(QObjectCleanupHandler, factorycleanup)
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extern int kLibraryDebugArea();
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namespace Calamares
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{
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PluginFactory::PluginFactory()
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: d_ptr_p(new PluginFactoryPrivate)
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{
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Q_D(PluginFactory);
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d->q_ptr = this;
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factorycleanup()->add(this);
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}
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PluginFactory::PluginFactory(PluginFactoryPrivate &d)
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: d_ptr_p(&d)
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{
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factorycleanup()->add(this);
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}
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PluginFactory::~PluginFactory()
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{
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delete d_ptr_p;
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}
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void PluginFactory::doRegisterPlugin(const QString &keyword, const QMetaObject *metaObject, CreateInstanceFunction instanceFunction)
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{
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Q_D(PluginFactory);
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Q_ASSERT(metaObject);
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// we allow different interfaces to be registered without keyword
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if (!keyword.isEmpty()) {
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if (d->createInstanceHash.contains(keyword)) {
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qWarning() << "A plugin with the keyword" << keyword << "was already registered. A keyword must be unique!";
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}
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d->createInstanceHash.insert(keyword, PluginFactoryPrivate::Plugin(metaObject, instanceFunction));
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} else {
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const QList<PluginFactoryPrivate::Plugin> clashes(d->createInstanceHash.values(keyword));
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const QMetaObject *superClass = metaObject->superClass();
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if (superClass) {
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for (const PluginFactoryPrivate::Plugin &plugin : clashes) {
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for (const QMetaObject *otherSuper = plugin.first->superClass(); otherSuper;
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otherSuper = otherSuper->superClass()) {
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if (superClass == otherSuper) {
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qWarning() << "Two plugins with the same interface(" << superClass->className() << ") were registered. Use keywords to identify the plugins.";
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}
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}
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}
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}
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for (const PluginFactoryPrivate::Plugin &plugin : clashes) {
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superClass = plugin.first->superClass();
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if (superClass) {
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for (const QMetaObject *otherSuper = metaObject->superClass(); otherSuper;
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otherSuper = otherSuper->superClass()) {
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if (superClass == otherSuper) {
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qWarning() << "Two plugins with the same interface(" << superClass->className() << ") were registered. Use keywords to identify the plugins.";
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}
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}
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}
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}
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d->createInstanceHash.insertMulti(keyword, PluginFactoryPrivate::Plugin(metaObject, instanceFunction));
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}
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}
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QObject *PluginFactory::create(const char *iface, QWidget *parentWidget, QObject *parent, const QString &keyword)
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{
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Q_D(PluginFactory);
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QObject *obj( nullptr );
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const QList<PluginFactoryPrivate::Plugin> candidates(d->createInstanceHash.values(keyword));
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// for !keyword.isEmpty() candidates.count() is 0 or 1
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for (const PluginFactoryPrivate::Plugin &plugin : candidates) {
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for (const QMetaObject *current = plugin.first; current; current = current->superClass()) {
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if (0 == qstrcmp(iface, current->className())) {
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if (obj) {
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qWarning() << "ambiguous interface requested from a DSO containing more than one plugin";
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}
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obj = plugin.second(parentWidget, parent);
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break;
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}
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}
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}
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if (obj) {
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emit objectCreated(obj);
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}
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return obj;
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}
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}
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