File indexing completed on 2024-04-14 03:57:14

 /*
     This file is part of the KDE libraries
     SPDX-FileCopyrightText: 2000 Simon Hausmann <hausmann@kde.org>
     SPDX-FileCopyrightText: 2000 Kurt Granroth <granroth@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-only
 */
 
 #include "kxmlguiclient.h"
 
 #include "debug.h"
 #include "kactioncollection.h"
 #include "kxmlguibuilder.h"
 #include "kxmlguifactory.h"
 #include "kxmlguiversionhandler_p.h"
 
 #include <QAction>
 #include <QCoreApplication>
 #include <QDir>
 #include <QDomDocument>
 #include <QFile>
 #include <QPointer>
 #include <QStandardPaths>
 
 #include <KAuthorized>
 #include <KLocalizedString>
 
 #include <cassert>
 
 class KXMLGUIClientPrivate
 {
 public:
     KXMLGUIClientPrivate()
         : m_componentName(QCoreApplication::applicationName())
         , m_textTagNames({QStringLiteral("text"), QStringLiteral("Text"), QStringLiteral("title")})
     {
     }
     ~KXMLGUIClientPrivate()
     {
     }
 
     bool mergeXML(QDomElement &base, QDomElement &additive, KActionCollection *actionCollection);
     bool isEmptyContainer(const QDomElement &base, KActionCollection *actionCollection) const;
 
     QDomElement findMatchingElement(const QDomElement &base, const QDomElement &additive);
 
     QString m_componentName;
 
     QDomDocument m_doc;
     KActionCollection *m_actionCollection = nullptr;
     QDomDocument m_buildDocument;
     QPointer<KXMLGUIFactory> m_factory;
     KXMLGUIClient *m_parent = nullptr;
     // QPtrList<KXMLGUIClient> m_supers;
     QList<KXMLGUIClient *> m_children;
     KXMLGUIBuilder *m_builder = nullptr;
     QString m_xmlFile;
     QString m_localXMLFile;
     const QStringList m_textTagNames;
 
     // Actions to enable/disable on a state change
     QMap<QString, KXMLGUIClient::StateChange> m_actionsStateMap;
 };
 
 KXMLGUIClient::KXMLGUIClient()
     : d(new KXMLGUIClientPrivate)
 {
 }
 
 KXMLGUIClient::KXMLGUIClient(KXMLGUIClient *parent)
     : d(new KXMLGUIClientPrivate)
 {
     Q_INIT_RESOURCE(kxmlgui);
 
     parent->insertChildClient(this);
 }
 
 KXMLGUIClient::~KXMLGUIClient()
 {
     if (d->m_parent) {
         d->m_parent->removeChildClient(this);
     }
 
     if (d->m_factory) {
         qCWarning(DEBUG_KXMLGUI)
             << this << "deleted without having been removed from the factory first. This will leak standalone popupmenus and could lead to crashes.";
         d->m_factory->forgetClient(this);
     }
 
     for (KXMLGUIClient *client : std::as_const(d->m_children)) {
         if (d->m_factory) {
             d->m_factory->forgetClient(client);
         }
         assert(client->d->m_parent == this);
         client->d->m_parent = nullptr;
     }
 
     delete d->m_actionCollection;
 
     delete d;
 }
 
 QAction *KXMLGUIClient::action(const QString &name) const
 {
     QAction *act = actionCollection()->action(name);
     if (!act) {
         for (KXMLGUIClient *client : std::as_const(d->m_children)) {
             act = client->actionCollection()->action(name);
             if (act) {
                 break;
             }
         }
     }
     return act;
 }
 
 KActionCollection *KXMLGUIClient::actionCollection() const
 {
     if (!d->m_actionCollection) {
         d->m_actionCollection = new KActionCollection(this);
         d->m_actionCollection->setObjectName(QStringLiteral("KXMLGUIClient-KActionCollection"));
     }
     return d->m_actionCollection;
 }
 
 QAction *KXMLGUIClient::action(const QDomElement &element) const
 {
     return actionCollection()->action(element.attribute(QStringLiteral("name")));
 }
 
 QString KXMLGUIClient::componentName() const
 {
     return d->m_componentName;
 }
 
 QDomDocument KXMLGUIClient::domDocument() const
 {
     return d->m_doc;
 }
 
 QString KXMLGUIClient::xmlFile() const
 {
     return d->m_xmlFile;
 }
 
 QString KXMLGUIClient::localXMLFile() const
 {
     if (!d->m_localXMLFile.isEmpty()) {
         return d->m_localXMLFile;
     }
 
     if (!QDir::isRelativePath(d->m_xmlFile)) {
         return QString(); // can't save anything here
     }
 
     if (d->m_xmlFile.isEmpty()) { // setXMLFile not called at all, can't save. Use case: ToolBarHandler
         return QString();
     }
 
     return QStandardPaths::writableLocation(QStandardPaths::GenericDataLocation) + QLatin1String("/kxmlgui5/%1/%2").arg(componentName(), d->m_xmlFile);
 }
 
 void KXMLGUIClient::reloadXML()
 {
     // TODO: this method can't be used for the KXmlGuiWindow, since it doesn't merge in ui_standards.rc!
     //   -> KDE5: load ui_standards_rc in setXMLFile using a flag, and remember that flag?
     //            and then KEditToolBar can use reloadXML.
     QString file(xmlFile());
     if (!file.isEmpty()) {
         setXMLFile(file);
     }
 }
 
 void KXMLGUIClient::setComponentName(const QString &componentName, const QString &componentDisplayName)
 {
     d->m_componentName = componentName;
     actionCollection()->setComponentName(componentName);
     actionCollection()->setComponentDisplayName(componentDisplayName);
     if (d->m_builder) {
         d->m_builder->setBuilderClient(this);
     }
 }
 
 QString KXMLGUIClient::standardsXmlFileLocation()
 {
     if (QStandardPaths::isTestModeEnabled()) {
         return QStringLiteral(":/kxmlgui5/ui_standards.rc");
     }
     QString file = QStandardPaths::locate(QStandardPaths::GenericConfigLocation, QStringLiteral("kxmlgui5/ui_standards.rc"));
     if (file.isEmpty()) {
         // fallback to resource, to allow to use the rc file compiled into this framework, must exist!
         file = QStringLiteral(":/kxmlgui5/ui_standards.rc");
         Q_ASSERT(QFile::exists(file));
     }
     return file;
 }
 
 void KXMLGUIClient::loadStandardsXmlFile()
 {
     setXML(KXMLGUIFactory::readConfigFile(standardsXmlFileLocation()));
 }
 
 void KXMLGUIClient::setXMLFile(const QString &_file, bool merge, bool setXMLDoc)
 {
     // store our xml file name
     if (!_file.isNull()) {
         d->m_xmlFile = _file;
     }
 
     if (!setXMLDoc) {
         return;
     }
 
     QString file = _file;
     QStringList allFiles;
     if (!QDir::isRelativePath(file)) {
         allFiles.append(file);
     } else {
         const QString filter = componentName() + QLatin1Char('/') + _file;
 
         // files on filesystem
         allFiles << QStandardPaths::locateAll(QStandardPaths::GenericDataLocation, QStringLiteral("kxmlgui5/") + filter);
 
         // built-in resource file
         const QString qrcFile(QLatin1String(":/kxmlgui5/") + filter);
         if (QFile::exists(qrcFile)) {
             allFiles << qrcFile;
         }
     }
     if (allFiles.isEmpty() && !_file.isEmpty()) {
         // if a non-empty file gets passed and we can't find it,
         // inform the developer using some debug output
         qCWarning(DEBUG_KXMLGUI) << "cannot find .rc file" << _file << "for component" << componentName();
     }
 
     // make sure to merge the settings from any file specified by setLocalXMLFile()
     if (!d->m_localXMLFile.isEmpty() && !file.endsWith(QLatin1String("ui_standards.rc"))) {
         const bool exists = QDir::isRelativePath(d->m_localXMLFile) || QFile::exists(d->m_localXMLFile);
         if (exists && !allFiles.contains(d->m_localXMLFile)) {
             allFiles.prepend(d->m_localXMLFile);
         }
     }
 
     QString doc;
     if (!allFiles.isEmpty()) {
         file = findMostRecentXMLFile(allFiles, doc);
     }
 
     // Always call setXML, even on error, so that we don't keep all ui_standards.rc menus.
     setXML(doc, merge);
 }
 
 void KXMLGUIClient::setLocalXMLFile(const QString &file)
 {
     d->m_localXMLFile = file;
 }
 
 void KXMLGUIClient::replaceXMLFile(const QString &xmlfile, const QString &localxmlfile, bool merge)
 {
     if (!QDir::isAbsolutePath(xmlfile)) {
         qCWarning(DEBUG_KXMLGUI) << "xml file" << xmlfile << "is not an absolute path";
     }
 
     setLocalXMLFile(localxmlfile);
     setXMLFile(xmlfile, merge);
 }
 
 // The top document element may have translation domain attribute set,
 // or the translation domain may be implicitly the application domain.
 // This domain must be used to fetch translations for all text elements
 // in the document that do not have their own domain attribute.
 // In order to preserve this semantics through document mergings,
 // the top or application domain must be propagated to all text elements
 // lacking their own domain attribute.
 static void propagateTranslationDomain(QDomDocument &doc, const QStringList &tagNames)
 {
     const QLatin1String attrDomain("translationDomain");
     QDomElement base = doc.documentElement();
     QString domain = base.attribute(attrDomain);
     if (domain.isEmpty()) {
         domain = QString::fromUtf8(KLocalizedString::applicationDomain());
         if (domain.isEmpty()) {
             return;
         }
     }
     for (const QString &tagName : tagNames) {
         QDomNodeList textNodes = base.elementsByTagName(tagName);
         for (int i = 0; i < textNodes.length(); ++i) {
             QDomElement e = textNodes.item(i).toElement();
             QString localDomain = e.attribute(attrDomain);
             if (localDomain.isEmpty()) {
                 e.setAttribute(attrDomain, domain);
             }
         }
     }
 }
 
 void KXMLGUIClient::setXML(const QString &document, bool merge)
 {
     QDomDocument doc;
     // QDomDocument raises a parse error on empty document, but we accept no app-specific document,
     // in which case you only get ui_standards.rc layout.
     if (!document.isEmpty()) {
         const QDomDocument::ParseResult result = doc.setContent(document);
         if (!result) {
             qCCritical(DEBUG_KXMLGUI) << "Error parsing XML document:" << result.errorMessage << "at line" << result.errorLine << "column"
                                       << result.errorColumn;
 #ifdef NDEBUG
             setDOMDocument(QDomDocument(), merge); // otherwise empty menus from ui_standards.rc stay around
 #else
             abort();
 #endif
             return;
         }
     }
 
     propagateTranslationDomain(doc, d->m_textTagNames);
     setDOMDocument(doc, merge);
 }
 
 void KXMLGUIClient::setDOMDocument(const QDomDocument &document, bool merge)
 {
     if (merge && !d->m_doc.isNull()) {
         QDomElement base = d->m_doc.documentElement();
 
         QDomElement e = document.documentElement();
 
         // merge our original (global) xml with our new one
         d->mergeXML(base, e, actionCollection());
 
         // reassign our pointer as mergeXML might have done something
         // strange to it
         base = d->m_doc.documentElement();
 
         // qCDebug(DEBUG_KXMLGUI) << "Result of xmlgui merging:" << d->m_doc.toString();
 
         // we want some sort of failsafe.. just in case
         if (base.isNull()) {
             d->m_doc = document;
         }
     } else {
         d->m_doc = document;
     }
 
     setXMLGUIBuildDocument(QDomDocument());
 }
 
 // if (equals(a,b)) is more readable than if (a.compare(b, Qt::CaseInsensitive)==0)
 static inline bool equalstr(const QString &a, const QString &b)
 {
     return a.compare(b, Qt::CaseInsensitive) == 0;
 }
 static inline bool equalstr(const QString &a, QLatin1String b)
 {
     return a.compare(b, Qt::CaseInsensitive) == 0;
 }
 
 bool KXMLGUIClientPrivate::mergeXML(QDomElement &base, QDomElement &additive, KActionCollection *actionCollection)
 {
     const QLatin1String tagAction("Action");
     const QLatin1String tagMerge("Merge");
     const QLatin1String tagSeparator("Separator");
     const QLatin1String tagMergeLocal("MergeLocal");
     const QLatin1String tagText("text");
     const QLatin1String attrAppend("append");
     const QString attrName(QStringLiteral("name"));
     const QString attrWeakSeparator(QStringLiteral("weakSeparator"));
     const QString attrAlreadyVisited(QStringLiteral("alreadyVisited"));
     const QString attrNoMerge(QStringLiteral("noMerge"));
     const QLatin1String attrOne("1");
 
     // there is a possibility that we don't want to merge in the
     // additive.. rather, we might want to *replace* the base with the
     // additive.  this can be for any container.. either at a file wide
     // level or a simple container level.  we look for the 'noMerge'
     // tag, in any event and just replace the old with the new
     if (additive.attribute(attrNoMerge) == attrOne) { // ### use toInt() instead? (Simon)
         base.parentNode().replaceChild(additive, base);
         return true;
     } else {
         // Merge attributes
         {
             const QDomNamedNodeMap attribs = additive.attributes();
             const int attribcount = attribs.count();
 
             for (int i = 0; i < attribcount; ++i) {
                 const QDomNode node = attribs.item(i);
                 base.setAttribute(node.nodeName(), node.nodeValue());
             }
         }
 
         // iterate over all elements in the container (of the global DOM tree)
         QDomNode n = base.firstChild();
         while (!n.isNull()) {
             QDomElement e = n.toElement();
             n = n.nextSibling(); // Advance now so that we can safely delete e
             if (e.isNull()) {
                 continue;
             }
 
             const QString tag = e.tagName();
 
             // if there's an action tag in the global tree and the action is
             // not implemented, then we remove the element
             if (equalstr(tag, tagAction)) {
                 const QString name = e.attribute(attrName);
                 if (!actionCollection->action(name) || !KAuthorized::authorizeAction(name)) {
                     // remove this child as we aren't using it
                     base.removeChild(e);
                     continue;
                 }
             }
 
             // if there's a separator defined in the global tree, then add an
             // attribute, specifying that this is a "weak" separator
             else if (equalstr(tag, tagSeparator)) {
                 e.setAttribute(attrWeakSeparator, uint(1));
 
                 // okay, hack time. if the last item was a weak separator OR
                 // this is the first item in a container, then we nuke the
                 // current one
                 QDomElement prev = e.previousSibling().toElement();
                 if (prev.isNull() //
                     || (equalstr(prev.tagName(), tagSeparator) && !prev.attribute(attrWeakSeparator).isNull()) //
                     || (equalstr(prev.tagName(), tagText))) {
                     // the previous element was a weak separator or didn't exist
                     base.removeChild(e);
                     continue;
                 }
             }
 
             // the MergeLocal tag lets us specify where non-standard elements
             // of the local tree shall be merged in.  After inserting the
             // elements we delete this element
             else if (equalstr(tag, tagMergeLocal)) {
                 QDomNode it = additive.firstChild();
                 while (!it.isNull()) {
                     QDomElement newChild = it.toElement();
                     it = it.nextSibling();
                     if (newChild.isNull()) {
                         continue;
                     }
 
                     if (equalstr(newChild.tagName(), tagText)) {
                         continue;
                     }
 
                     if (newChild.attribute(attrAlreadyVisited) == attrOne) {
                         continue;
                     }
 
                     QString itAppend(newChild.attribute(attrAppend));
                     QString elemName(e.attribute(attrName));
 
                     if ((itAppend.isNull() && elemName.isEmpty()) || (itAppend == elemName)) {
                         // first, see if this new element matches a standard one in
                         // the global file.  if it does, then we skip it as it will
                         // be merged in, later
                         QDomElement matchingElement = findMatchingElement(newChild, base);
                         if (matchingElement.isNull() || equalstr(newChild.tagName(), tagSeparator)) {
                             base.insertBefore(newChild, e);
                         }
                     }
                 }
 
                 base.removeChild(e);
                 continue;
             }
 
             else if (equalstr(tag, tagText)) {
                 continue;
             } else if (equalstr(tag, tagMerge)) {
                 continue;
             }
 
             // in this last case we check for a separator tag and, if not, we
             // can be sure that it is a container --> proceed with child nodes
             // recursively and delete the just proceeded container item in
             // case it is empty (if the recursive call returns true)
             else {
                 QDomElement matchingElement = findMatchingElement(e, additive);
                 if (!matchingElement.isNull()) {
                     matchingElement.setAttribute(attrAlreadyVisited, uint(1));
 
                     if (mergeXML(e, matchingElement, actionCollection)) {
                         base.removeChild(e);
                         additive.removeChild(matchingElement); // make sure we don't append it below
                         continue;
                     }
 
                     continue;
                 } else {
                     // this is an important case here! We reach this point if the
                     // "local" tree does not contain a container definition for
                     // this container. However we have to call mergeXML recursively
                     // and make it check if there are actions implemented for this
                     // container. *If* none, then we can remove this container now
                     QDomElement dummy;
                     if (mergeXML(e, dummy, actionCollection)) {
                         base.removeChild(e);
                     }
                     continue;
                 }
             }
         }
 
         // here we append all child elements which were not inserted
         // previously via the LocalMerge tag
         n = additive.firstChild();
         while (!n.isNull()) {
             QDomElement e = n.toElement();
             n = n.nextSibling(); // Advance now so that we can safely delete e
             if (e.isNull()) {
                 continue;
             }
 
             QDomElement matchingElement = findMatchingElement(e, base);
 
             if (matchingElement.isNull()) {
                 base.appendChild(e);
             }
         }
 
         // do one quick check to make sure that the last element was not
         // a weak separator
         QDomElement last = base.lastChild().toElement();
         if (equalstr(last.tagName(), tagSeparator) && (!last.attribute(attrWeakSeparator).isNull())) {
             base.removeChild(last);
         }
     }
 
     return isEmptyContainer(base, actionCollection);
 }
 
 bool KXMLGUIClientPrivate::isEmptyContainer(const QDomElement &base, KActionCollection *actionCollection) const
 {
     // now we check if we are empty (in which case we return "true", to
     // indicate the caller that it can delete "us" (the base element
     // argument of "this" call)
     QDomNode n = base.firstChild();
     while (!n.isNull()) {
         const QDomElement e = n.toElement();
         n = n.nextSibling(); // Advance now so that we can safely delete e
         if (e.isNull()) {
             continue;
         }
 
         const QString tag = e.tagName();
 
         if (equalstr(tag, QLatin1String("Action"))) {
             // if base contains an implemented action, then we must not get
             // deleted (note that the actionCollection contains both,
             // "global" and "local" actions)
             if (actionCollection->action(e.attribute(QStringLiteral("name")))) {
                 return false;
             }
         } else if (equalstr(tag, QLatin1String("Separator"))) {
             // if we have a separator which has *not* the weak attribute
             // set, then it must be owned by the "local" tree in which case
             // we must not get deleted either
             const QString weakAttr = e.attribute(QStringLiteral("weakSeparator"));
             if (weakAttr.isEmpty() || weakAttr.toInt() != 1) {
                 return false;
             }
         }
 
         else if (equalstr(tag, QLatin1String("merge"))) {
             continue;
         }
 
         // a text tag is NOT enough to spare this container
         else if (equalstr(tag, QLatin1String("text"))) {
             continue;
         }
 
         // what's left are non-empty containers! *don't* delete us in this
         // case (at this position we can be *sure* that the container is
         // *not* empty, as the recursive call for it was in the first loop
         // which deleted the element in case the call returned "true"
         else {
             return false;
         }
     }
 
     return true; // I'm empty, please delete me.
 }
 
 QDomElement KXMLGUIClientPrivate::findMatchingElement(const QDomElement &base, const QDomElement &additive)
 {
     const QString idAttribute(base.tagName() == QLatin1String("ActionProperties") ? QStringLiteral("scheme") : QStringLiteral("name"));
 
     QDomNode n = additive.firstChild();
     while (!n.isNull()) {
         QDomElement e = n.toElement();
         n = n.nextSibling(); // Advance now so that we can safely delete e -- TODO we don't, so simplify this
         if (e.isNull()) {
             continue;
         }
 
         const QString tag = e.tagName();
         // skip all action and merge tags as we will never use them
         if (equalstr(tag, QLatin1String("Action")) //
             || equalstr(tag, QLatin1String("MergeLocal"))) {
             continue;
         }
 
         // now see if our tags are equivalent
         if (equalstr(tag, base.tagName()) //
             && e.attribute(idAttribute) == base.attribute(idAttribute)) {
             return e;
         }
     }
 
     // nope, return a (now) null element
     return QDomElement();
 }
 
 void KXMLGUIClient::setXMLGUIBuildDocument(const QDomDocument &doc)
 {
     d->m_buildDocument = doc;
 }
 
 QDomDocument KXMLGUIClient::xmlguiBuildDocument() const
 {
     return d->m_buildDocument;
 }
 
 void KXMLGUIClient::setFactory(KXMLGUIFactory *factory)
 {
     d->m_factory = factory;
 }
 
 KXMLGUIFactory *KXMLGUIClient::factory() const
 {
     return d->m_factory;
 }
 
 KXMLGUIClient *KXMLGUIClient::parentClient() const
 {
     return d->m_parent;
 }
 
 void KXMLGUIClient::insertChildClient(KXMLGUIClient *child)
 {
     if (child->d->m_parent) {
         child->d->m_parent->removeChildClient(child);
     }
     d->m_children.append(child);
     child->d->m_parent = this;
 }
 
 void KXMLGUIClient::removeChildClient(KXMLGUIClient *child)
 {
     assert(d->m_children.contains(child));
     d->m_children.removeAll(child);
     child->d->m_parent = nullptr;
 }
 
 /*bool KXMLGUIClient::addSuperClient( KXMLGUIClient *super )
 {
   if ( d->m_supers.contains( super ) )
     return false;
   d->m_supers.append( super );
   return true;
 }*/
 
 QList<KXMLGUIClient *> KXMLGUIClient::childClients()
 {
     return d->m_children;
 }
 
 void KXMLGUIClient::setClientBuilder(KXMLGUIBuilder *builder)
 {
     d->m_builder = builder;
 }
 
 KXMLGUIBuilder *KXMLGUIClient::clientBuilder() const
 {
     return d->m_builder;
 }
 
 void KXMLGUIClient::plugActionList(const QString &name, const QList<QAction *> &actionList)
 {
     if (!d->m_factory) {
         return;
     }
 
     d->m_factory->plugActionList(this, name, actionList);
 }
 
 void KXMLGUIClient::unplugActionList(const QString &name)
 {
     if (!d->m_factory) {
         return;
     }
 
     d->m_factory->unplugActionList(this, name);
 }
 
 QString KXMLGUIClient::findMostRecentXMLFile(const QStringList &files, QString &doc)
 {
     KXmlGuiVersionHandler versionHandler(files);
     doc = versionHandler.finalDocument();
     return versionHandler.finalFile();
 }
 
 void KXMLGUIClient::addStateActionEnabled(const QString &state, const QString &action)
 {
     StateChange stateChange = getActionsToChangeForState(state);
 
     stateChange.actionsToEnable.append(action);
     // qCDebug(DEBUG_KXMLGUI) << "KXMLGUIClient::addStateActionEnabled( " << state << ", " << action << ")";
 
     d->m_actionsStateMap.insert(state, stateChange);
 }
 
 void KXMLGUIClient::addStateActionDisabled(const QString &state, const QString &action)
 {
     StateChange stateChange = getActionsToChangeForState(state);
 
     stateChange.actionsToDisable.append(action);
     // qCDebug(DEBUG_KXMLGUI) << "KXMLGUIClient::addStateActionDisabled( " << state << ", " << action << ")";
 
     d->m_actionsStateMap.insert(state, stateChange);
 }
 
 KXMLGUIClient::StateChange KXMLGUIClient::getActionsToChangeForState(const QString &state)
 {
     return d->m_actionsStateMap[state];
 }
 
 void KXMLGUIClient::stateChanged(const QString &newstate, KXMLGUIClient::ReverseStateChange reverse)
 {
     const StateChange stateChange = getActionsToChangeForState(newstate);
 
     bool setTrue = (reverse == StateNoReverse);
     bool setFalse = !setTrue;
 
     // Enable actions which need to be enabled...
     //
     for (const auto &actionId : stateChange.actionsToEnable) {
         QAction *action = actionCollection()->action(actionId);
         if (action) {
             action->setEnabled(setTrue);
         }
     }
 
     // and disable actions which need to be disabled...
     //
     for (const auto &actionId : stateChange.actionsToDisable) {
         QAction *action = actionCollection()->action(actionId);
         if (action) {
             action->setEnabled(setFalse);
         }
     }
 }
 
 void KXMLGUIClient::beginXMLPlug(QWidget *w)
 {
     actionCollection()->addAssociatedWidget(w);
     for (KXMLGUIClient *client : std::as_const(d->m_children)) {
         client->beginXMLPlug(w);
     }
 }
 
 void KXMLGUIClient::endXMLPlug()
 {
 }
 
 void KXMLGUIClient::prepareXMLUnplug(QWidget *w)
 {
     actionCollection()->removeAssociatedWidget(w);
     for (KXMLGUIClient *client : std::as_const(d->m_children)) {
         client->prepareXMLUnplug(w);
     }
 }
 
 void KXMLGUIClient::virtual_hook(int, void *)
 {
     /*BASE::virtual_hook( id, data );*/
 }
 
 QString KXMLGUIClient::findVersionNumber(const QString &xml)
 {
     enum {
         ST_START,
         ST_AFTER_OPEN,
         ST_AFTER_GUI,
         ST_EXPECT_VERSION,
         ST_VERSION_NUM,
     } state = ST_START;
     const int length = xml.length();
     for (int pos = 0; pos < length; pos++) {
         switch (state) {
         case ST_START:
             if (xml[pos] == QLatin1Char('<')) {
                 state = ST_AFTER_OPEN;
             }
             break;
         case ST_AFTER_OPEN: {
             // Jump to gui..
             const int guipos = xml.indexOf(QLatin1String("gui"), pos, Qt::CaseInsensitive);
             if (guipos == -1) {
                 return QString(); // Reject
             }
 
             pos = guipos + 2; // Position at i, so we're moved ahead to the next character by the ++;
             state = ST_AFTER_GUI;
             break;
         }
         case ST_AFTER_GUI:
             state = ST_EXPECT_VERSION;
             break;
         case ST_EXPECT_VERSION: {
             const int verpos = xml.indexOf(QLatin1String("version"), pos, Qt::CaseInsensitive);
             if (verpos == -1) {
                 return QString(); // Reject
             }
             pos = verpos + 7; // strlen("version") is 7
             while (xml.at(pos).isSpace()) {
                 ++pos;
             }
             if (xml.at(pos++) != QLatin1Char('=')) {
                 return QString(); // Reject
             }
             while (xml.at(pos).isSpace()) {
                 ++pos;
             }
 
             state = ST_VERSION_NUM;
             break;
         }
         case ST_VERSION_NUM: {
             int endpos;
             for (endpos = pos; endpos < length; endpos++) {
                 const ushort ch = xml[endpos].unicode();
                 if (ch >= QLatin1Char('0') && ch <= QLatin1Char('9')) {
                     continue; // Number..
                 }
                 if (ch == QLatin1Char('"')) { // End of parameter
                     break;
                 } else { // This shouldn't be here..
                     endpos = length;
                 }
             }
 
             if (endpos != pos && endpos < length) {
                 const QString matchCandidate = xml.mid(pos, endpos - pos); // Don't include " ".
                 return matchCandidate;
             }
 
             state = ST_EXPECT_VERSION; // Try to match a well-formed version..
             break;
         } // case..
         } // switch
     } // for
 
     return QString();
 }