File indexing completed on 2023-09-24 04:11:07

 /*
     This file is part of the KDE libraries
     SPDX-FileCopyrightText: 2000 Torben Weis <weis@kde.org>
     SPDX-FileCopyrightText: 2006 David Faure <faure@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #include "kmimetypetrader.h"
 
 #include "kmimetypefactory_p.h"
 #include "kservicefactory_p.h"
 #include "kservicetype.h"
 #include "kservicetypeprofile.h"
 #include "kservicetypetrader.h"
 #include "ksycoca.h"
 #include "ksycoca_p.h"
 #include "servicesdebug.h"
 #include <QMimeDatabase>
 
 #if KSERVICE_BUILD_DEPRECATED_SINCE(5, 82)
 
 class KMimeTypeTraderPrivate
 {
 public:
     KMimeTypeTraderPrivate()
     {
     }
 };
 
 class KMimeTypeTraderSingleton
 {
 public:
     KMimeTypeTrader instance;
 };
 
 Q_GLOBAL_STATIC(KMimeTypeTraderSingleton, s_self)
 
 KMimeTypeTrader *KMimeTypeTrader::self()
 {
     return &s_self()->instance;
 }
 
 KMimeTypeTrader::KMimeTypeTrader()
     : d(new KMimeTypeTraderPrivate())
 {
 }
 
 KMimeTypeTrader::~KMimeTypeTrader()
 {
     delete d;
 }
 
 static KServiceOfferList mimeTypeSycocaOffers(const QString &mimeType)
 {
     KServiceOfferList lst;
 
     QMimeDatabase db;
     QString mime = db.mimeTypeForName(mimeType).name();
     if (mime.isEmpty()) {
         if (!mimeType.startsWith(QLatin1String("x-scheme-handler/"))) { // don't warn for unknown scheme handler MIME types
             qCWarning(SERVICES) << "KMimeTypeTrader: MIME type" << mimeType << "not found";
             return lst; // empty
         }
         mime = mimeType;
     }
     KSycoca::self()->ensureCacheValid();
     KMimeTypeFactory *factory = KSycocaPrivate::self()->mimeTypeFactory();
     const int offset = factory->entryOffset(mime);
     if (!offset) { // shouldn't happen, now that we know the MIME type exists
         if (!mimeType.startsWith(QLatin1String("x-scheme-handler/"))) { // don't warn for unknown scheme handler MIME types
             qCDebug(SERVICES) << "KMimeTypeTrader: no entry offset for" << mimeType;
         }
         return lst; // empty
     }
 
     const int serviceOffersOffset = factory->serviceOffersOffset(mime);
     if (serviceOffersOffset > -1) {
         lst = KSycocaPrivate::self()->serviceFactory()->offers(offset, serviceOffersOffset);
     }
     return lst;
 }
 
 static KService::List mimeTypeSycocaServiceOffers(const QString &mimeType)
 {
     KService::List lst;
     QMimeDatabase db;
     QString mime = db.mimeTypeForName(mimeType).name();
     if (mime.isEmpty()) {
         if (!mimeType.startsWith(QLatin1String("x-scheme-handler/"))) { // don't warn for unknown scheme handler MIME types
             qCWarning(SERVICES) << "KMimeTypeTrader: MIME type" << mimeType << "not found";
             return lst; // empty
         }
         mime = mimeType;
     }
     KSycoca::self()->ensureCacheValid();
     KMimeTypeFactory *factory = KSycocaPrivate::self()->mimeTypeFactory();
     const int offset = factory->entryOffset(mime);
     if (!offset) {
         qCWarning(SERVICES) << "KMimeTypeTrader: MIME type" << mimeType << "not found";
         return lst; // empty
     }
     const int serviceOffersOffset = factory->serviceOffersOffset(mime);
     if (serviceOffersOffset > -1) {
         lst = KSycocaPrivate::self()->serviceFactory()->serviceOffers(offset, serviceOffersOffset);
     }
     return lst;
 }
 
 #define CHECK_SERVICETYPE(genericServiceTypePtr)                                                                                                               \
     if (!genericServiceTypePtr) {                                                                                                                              \
         qCWarning(SERVICES) << "KMimeTypeTrader: couldn't find service type" << genericServiceType                                                             \
                             << "\nPlease ensure that the .desktop file for it is installed; then run kbuildsycoca5.";                                          \
         return;                                                                                                                                                \
     }
 
 /**
  * Filter the offers for the requested MIME type for the @p genericServiceType.
  *
  * @param list list of offers (key=service, value=initialPreference)
  * @param genericServiceType the generic service type (e.g. "Application" or "KParts/ReadOnlyPart")
  */
 void KMimeTypeTrader::filterMimeTypeOffers(KServiceOfferList &list, const QString &genericServiceType) // static, internal
 {
     KServiceType::Ptr genericServiceTypePtr = KServiceType::serviceType(genericServiceType);
     CHECK_SERVICETYPE(genericServiceTypePtr);
 
     KSycoca::self()->ensureCacheValid();
 
     QMutableListIterator<KServiceOffer> it(list);
     while (it.hasNext()) {
         const KService::Ptr servPtr = it.next().service();
         // Expand servPtr->hasServiceType( genericServiceTypePtr ) to avoid lookup each time:
         if (!KSycocaPrivate::self()->serviceFactory()->hasOffer(genericServiceTypePtr, servPtr) //
             || !servPtr->showInCurrentDesktop()) {
             it.remove();
         }
     }
 }
 
 void KMimeTypeTrader::filterMimeTypeOffers(KService::List &list, const QString &genericServiceType) // static, internal
 {
     KServiceType::Ptr genericServiceTypePtr = KServiceType::serviceType(genericServiceType);
     CHECK_SERVICETYPE(genericServiceTypePtr);
 
     KSycoca::self()->ensureCacheValid();
 
     QMutableListIterator<KService::Ptr> it(list);
     while (it.hasNext()) {
         const KService::Ptr servPtr = it.next();
         // Expand servPtr->hasServiceType( genericServiceTypePtr ) to avoid lookup each time:
         if (!KSycocaPrivate::self()->serviceFactory()->hasOffer(genericServiceTypePtr->offset(),
                                                                 genericServiceTypePtr->serviceOffersOffset(),
                                                                 servPtr->offset())
             || !servPtr->showInCurrentDesktop()) {
             it.remove();
         }
     }
 }
 
 #undef CHECK_SERVICETYPE
 
 KService::List KMimeTypeTrader::query(const QString &mimeType, const QString &genericServiceType, const QString &constraint) const
 {
     // Get all services of this mime type.
     KService::List lst = mimeTypeSycocaServiceOffers(mimeType);
     filterMimeTypeOffers(lst, genericServiceType);
 
     KServiceTypeTrader::applyConstraints(lst, constraint);
 
     // qCDebug(SERVICES) << "query for MIME type " << mimeType << ", " << genericServiceType
     //         << " : returning " << lst.count() << " offers";
     return lst;
 }
 
 KService::Ptr KMimeTypeTrader::preferredService(const QString &mimeType, const QString &genericServiceType)
 {
     // First, get all offers known to ksycoca.
     KServiceOfferList offers = mimeTypeSycocaOffers(mimeType);
 
     // Assign preferences from the profile to those offers - and filter for genericServiceType
     Q_ASSERT(!genericServiceType.isEmpty());
     filterMimeTypeOffers(offers, genericServiceType);
 
     auto itOff = offers.constBegin();
 #if KSERVICE_BUILD_DEPRECATED_SINCE(5, 67)
     // Look for the first one that is allowed as default.
     // Since the allowed-as-default are first anyway, we only have
     // to look at the first one to know.
     if (itOff != offers.constEnd() && (*itOff).allowAsDefault()) {
 #else
     if (itOff != offers.constEnd()) {
 #endif
         return (*itOff).service();
     }
 
     // qCDebug(SERVICES) << "No offers, or none allowed as default";
     return KService::Ptr();
 }
 
 #endif