File indexing completed on 2024-09-15 03:39:51

 /*
     This file is part of the KDE libraries
     SPDX-FileCopyrightText: 1999, 2007 David Faure <faure@kde.org>
     SPDX-FileCopyrightText: 1999 Waldo Bastian <bastian@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-only
 */
 
 #include "kbuildmimetypefactory_p.h"
 #include "kbuildservicefactory_p.h"
 #include "kbuildservicegroupfactory_p.h"
 #include "ksycoca.h"
 
 #include "ksycocadict_p.h"
 #include "sycocadebug.h"
 #include <KDesktopFile>
 
 #include <QDebug>
 #include <QDir>
 #include <QMimeDatabase>
 
 #include <QStandardPaths>
 #include <kmimetypefactory_p.h>
 
 KBuildServiceFactory::KBuildServiceFactory(KBuildMimeTypeFactory *mimeTypeFactory, KBuildServiceGroupFactory *serviceGroupFactory)
     : KServiceFactory(mimeTypeFactory->sycoca())
     , m_nameMemoryHash()
     , m_relNameMemoryHash()
     , m_menuIdMemoryHash()
     , m_dupeDict()
     , m_mimeTypeFactory(mimeTypeFactory)
     , m_serviceGroupFactory(serviceGroupFactory)
 {
     m_nameDict = new KSycocaDict();
     m_relNameDict = new KSycocaDict();
     m_menuIdDict = new KSycocaDict();
 }
 
 KBuildServiceFactory::~KBuildServiceFactory()
 {
 }
 
 KService::Ptr KBuildServiceFactory::findServiceByDesktopName(const QString &name)
 {
     return m_nameMemoryHash.value(name);
 }
 
 KService::Ptr KBuildServiceFactory::findServiceByDesktopPath(const QString &name)
 {
     return m_relNameMemoryHash.value(name);
 }
 
 KService::Ptr KBuildServiceFactory::findServiceByMenuId(const QString &menuId)
 {
     return m_menuIdMemoryHash.value(menuId);
 }
 
 KSycocaEntry *KBuildServiceFactory::createEntry(const QString &file) const
 {
     const QStringView name = QStringView(file).mid(file.lastIndexOf(QLatin1Char('/')) + 1);
 
     // Is it a .desktop file?
     if (name.endsWith(QLatin1String(".desktop"))) {
         // qCDebug(SYCOCA) << file;
 
         Q_ASSERT(QDir::isAbsolutePath(file));
         KService *serv = new KService(file);
 
         // qCDebug(SYCOCA) << "Creating KService from" << file << "entryPath=" << serv->entryPath();
         // Note that the menuId will be set by the vfolder_menu.cpp code just after
         // createEntry returns.
 
         if (serv->isValid() && !serv->isDeleted()) {
             // qCDebug(SYCOCA) << "Creating KService from" << file << "entryPath=" << serv->entryPath() << "storageId=" << serv->storageId();
             return serv;
         } else {
             if (!serv->isDeleted()) {
                 qCWarning(SYCOCA) << "Invalid Service : " << file;
             }
             delete serv;
             return nullptr;
         }
     } // TODO else if a Windows application,  new KService(name, exec, icon)
     return nullptr;
 }
 
 void KBuildServiceFactory::saveHeader(QDataStream &str)
 {
     KSycocaFactory::saveHeader(str);
 
     str << qint32(m_nameDictOffset);
     str << qint32(m_relNameDictOffset);
     str << qint32(m_offerListOffset);
     str << qint32(m_menuIdDictOffset);
 }
 
 void KBuildServiceFactory::save(QDataStream &str)
 {
     KSycocaFactory::save(str);
 
     m_nameDictOffset = str.device()->pos();
     m_nameDict->save(str);
 
     m_relNameDictOffset = str.device()->pos();
     m_relNameDict->save(str);
 
     saveOfferList(str);
 
     m_menuIdDictOffset = str.device()->pos();
     m_menuIdDict->save(str);
 
     qint64 endOfFactoryData = str.device()->pos();
 
     // Update header (pass #3)
     saveHeader(str);
 
     // Seek to end.
     str.device()->seek(endOfFactoryData);
 }
 
 void KBuildServiceFactory::collectInheritedServices()
 {
     // For each MIME type, go up the parent MIME type chains and collect offers.
     // For "removed associations" to work, we can't just grab everything from all parents.
     // We need to process parents before children, hence the recursive call in
     // collectInheritedServices(mime) and the QSet to process a given parent only once.
     QSet<QString> visitedMimes;
     const auto lst = m_mimeTypeFactory->allMimeTypes();
     for (const QString &mimeType : lst) {
         collectInheritedServices(mimeType, visitedMimes);
     }
 }
 
 void KBuildServiceFactory::collectInheritedServices(const QString &mimeTypeName, QSet<QString> &visitedMimes)
 {
     if (visitedMimes.contains(mimeTypeName)) {
         return;
     }
     visitedMimes.insert(mimeTypeName);
 
     QMimeDatabase db;
     const QMimeType qmime = db.mimeTypeForName(mimeTypeName);
     const auto lst = qmime.parentMimeTypes();
     for (QString parentMimeType : lst) {
         // Workaround issue in shared-mime-info and/or Qt, which sometimes return an alias as parent
         parentMimeType = db.mimeTypeForName(parentMimeType).name();
 
         collectInheritedServices(parentMimeType, visitedMimes);
 
         const QList<KServiceOffer> &offers = m_offerHash.offersFor(parentMimeType);
         for (const auto &serviceOffer : offers) {
             if (!m_offerHash.hasRemovedOffer(mimeTypeName, serviceOffer.service())) {
                 KServiceOffer offer(serviceOffer);
                 offer.setMimeTypeInheritanceLevel(offer.mimeTypeInheritanceLevel() + 1);
                 // qCDebug(SYCOCA) << "INHERITANCE: Adding service" << (*itserv).service()->entryPath() << "to" << mimeTypeName << "mimeTypeInheritanceLevel="
                 // << mimeTypeInheritanceLevel;
                 m_offerHash.addServiceOffer(mimeTypeName, offer);
             }
         }
     }
 }
 
 void KBuildServiceFactory::postProcessServices()
 {
     // By doing all this here rather than in addEntry (and removing when replacing
     // with local override), we only do it for the final applications.
     // Note that this also affects resolution of the by-desktop-name lookup,
     // as name resolution is only performed *after* all the duplicates (based on
     // storage ID) have been removed.
 
     // For every service...
     for (auto itserv = m_entryDict->cbegin(), endIt = m_entryDict->cend(); itserv != endIt; ++itserv) {
         KSycocaEntry::Ptr entry = itserv.value();
         KService::Ptr service(static_cast<KService *>(entry.data()));
 
         const QString name = service->desktopEntryName();
         KService::Ptr dup = m_nameMemoryHash.value(name);
         if (dup) {
             // The rule is that searching for the desktop name "foo" should find
             // the desktop file with the storage id "foo.desktop" before it
             // finds "bar/foo.desktop" (or "bar-foo.desktop").
             // "bar/foo.desktop" and "baz/foo.desktop" are arbitrarily ordered
             // (in practice, the one later in the alphabet wins).
             if (dup->storageId().endsWith(service->storageId())) {
                 // allow dup to be overridden
                 m_nameDict->remove(name);
                 dup = nullptr;
             }
         }
         if (!dup) {
             m_nameDict->add(name, entry);
             m_nameMemoryHash.insert(name, service);
         }
 
         const QString relName = service->entryPath();
         // qCDebug(SYCOCA) << "adding service" << service.data() << "isApp=" << service->isApplication() << "menuId=" << service->menuId() << "name=" << name <<
         // "relName=" << relName;
         m_relNameDict->add(relName, entry);
         m_relNameMemoryHash.insert(relName, service); // for KMimeAssociations
 
         const QString menuId = service->menuId();
         if (!menuId.isEmpty()) { // empty for services, non-empty for applications
             m_menuIdDict->add(menuId, entry);
             m_menuIdMemoryHash.insert(menuId, service); // for KMimeAssociations
         }
     }
     populateServiceTypes();
 }
 
 void KBuildServiceFactory::populateServiceTypes()
 {
     QMimeDatabase db;
     // For every service...
     for (auto servIt = m_entryDict->cbegin(), endIt = m_entryDict->cend(); servIt != endIt; ++servIt) {
         KService::Ptr service(static_cast<KService *>(servIt.value().data()));
         const bool hidden = !service->showInCurrentDesktop();
 
         QList<KService::ServiceTypeAndPreference> serviceTypeList = service->_k_accessServiceTypes();
 
         // Add this service to all its MIME types
         // Don't cache count(), it can change during iteration! (we can't use an iterator-based loop
         // here the container could get reallocated which would invalidate iterators)
         for (int i = 0; i < serviceTypeList.count(); ++i) {
             const KService::ServiceTypeAndPreference &typeAndPref = serviceTypeList.at(i);
             const QString stName = typeAndPref.serviceType;
 
             if (hidden) {
                 continue;
             }
             const int preference = typeAndPref.preference;
 
             KServiceOffer offer(service, preference, 0);
             QMimeType mime = db.mimeTypeForName(stName);
             if (!mime.isValid()) {
                 if (stName.startsWith(QLatin1String("x-scheme-handler/"))) {
                     // Create those on demand
                     m_mimeTypeFactory->createFakeMimeType(stName);
                     m_offerHash.addServiceOffer(stName, offer);
                 } else {
                     qCDebug(SYCOCA) << service->entryPath() << "specifies undefined MIME type/servicetype" << stName;
                     // technically we could call addServiceOffer here, 'mime' isn't used. But it
                     // would be useless, since we have no MIME type entry where to write the offers offset.
                     continue;
                 }
             } else {
                 bool shouldAdd = true;
                 const auto lst = service->mimeTypes();
 
                 for (const QString &otherType : lst) {
                     // Skip derived types if the base class is listed (#321706)
                     if (stName != otherType && mime.inherits(otherType)) {
                         // But don't skip aliases (they got resolved into mime.name() already, but don't let two aliases cancel out)
                         if (db.mimeTypeForName(otherType).name() != mime.name()) {
                             // qCDebug(SYCOCA) << "Skipping" << mime.name() << "because of" << otherType << "(canonical" << db.mimeTypeForName(otherType) <<
                             // ") while parsing" << service->entryPath();
                             shouldAdd = false;
                         }
                     }
                 }
                 if (shouldAdd) {
                     // qCDebug(SYCOCA) << "Adding service" << service->entryPath() << "to" << mime.name();
                     m_offerHash.addServiceOffer(mime.name(), offer); // mime.name() so that we resolve aliases
                 }
             }
         }
     }
 
     // Read user preferences (added/removed associations) and add/remove serviceoffers to m_offerHash
     KMimeAssociations mimeAssociations(m_offerHash, this);
     mimeAssociations.parseAllMimeAppsList();
 
     // Now for each MIME type, collect services from parent MIME types
     collectInheritedServices();
 
     // Now collect the offsets into the (future) offer list
     // The loops look very much like the ones in saveOfferList obviously.
     int offersOffset = 0;
     const int offerEntrySize = sizeof(qint32) * 4; // four qint32s, see saveOfferList.
 
     const auto &offerHash = m_offerHash.serviceTypeData();
     auto it = offerHash.constBegin();
     const auto end = offerHash.constEnd();
     for (; it != end; ++it) {
         const QString stName = it.key();
         const ServiceTypeOffersData offersData = it.value();
         const int numOffers = offersData.offers.count();
 
         KMimeTypeFactory::MimeTypeEntry::Ptr entry = m_mimeTypeFactory->findMimeTypeEntryByName(stName);
         if (entry) {
             entry->setServiceOffersOffset(offersOffset);
             offersOffset += offerEntrySize * numOffers;
         } else if (stName.startsWith(QLatin1String("x-scheme-handler/"))) {
             // Create those on demand
             entry = m_mimeTypeFactory->createFakeMimeType(stName);
             entry->setServiceOffersOffset(offersOffset);
             offersOffset += offerEntrySize * numOffers;
         } else {
             if (stName.isEmpty()) {
                 qCDebug(SYCOCA) << "Empty service type";
             } else {
                 qCWarning(SYCOCA) << "Service type not found:" << stName;
             }
         }
     }
 }
 
 void KBuildServiceFactory::saveOfferList(QDataStream &str)
 {
     m_offerListOffset = str.device()->pos();
     // qCDebug(SYCOCA) << "Saving offer list at offset" << m_offerListOffset;
 
     const auto &offerHash = m_offerHash.serviceTypeData();
     auto it = offerHash.constBegin();
     const auto end = offerHash.constEnd();
     for (; it != end; ++it) {
         const QString stName = it.key();
         const ServiceTypeOffersData offersData = it.value();
         QList<KServiceOffer> offers = offersData.offers;
         std::stable_sort(offers.begin(), offers.end()); // by initial preference
 
         int offset = -1;
         KMimeTypeFactory::MimeTypeEntry::Ptr entry = m_mimeTypeFactory->findMimeTypeEntryByName(stName);
         if (entry) {
             offset = entry->offset();
             // Q_ASSERT(str.device()->pos() == entry->serviceOffersOffset() + m_offerListOffset);
         }
         if (offset == -1) {
             qCDebug(SYCOCA) << "Didn't find servicetype or MIME type" << stName;
             continue;
         }
 
         for (const auto &offer : std::as_const(offers)) {
             // qCDebug(SYCOCA) << stName << ": writing offer" << offer.service()->desktopEntryName() << offset << offer.service()->offset() << "in sycoca at
             // pos" << str.device()->pos();
             Q_ASSERT(offer.service()->offset() != 0);
 
             str << qint32(offset);
             str << qint32(offer.service()->offset());
             str << qint32(offer.preference());
             str << qint32(offer.mimeTypeInheritanceLevel());
             // update offerEntrySize in populateServiceTypes if you add/remove something here
         }
     }
 
     str << qint32(0); // End of list marker (0)
 }
 
 void KBuildServiceFactory::addEntry(const KSycocaEntry::Ptr &newEntry)
 {
     Q_ASSERT(newEntry);
     if (m_dupeDict.contains(newEntry)) {
         return;
     }
 
     const KService::Ptr service(static_cast<KService *>(newEntry.data()));
     m_dupeDict.insert(newEntry);
     KSycocaFactory::addEntry(newEntry);
 }