shared_ptr<ManifestItem> SpineItem::ManifestItem() const { auto package = this->Owner(); if ( !package ) return nullptr; return package->ManifestItemWithID(Idref()); }
shared_ptr<ManifestItem> ManifestItem::Fallback() const { auto package = this->Owner(); if ( !package || _fallbackID.empty() ) return nullptr; return package->ManifestItemWithID(_fallbackID); }
shared_ptr<ManifestItem> ManifestItem::MediaOverlay() const { auto package = this->Owner(); if ( !package || _mediaOverlayID.empty() ) return nullptr; return package->ManifestItemWithID(_mediaOverlayID); }
shared_ptr<ManifestItem> Package::ManifestItemForCFI(ePub3::CFI &cfi, CFI* pRemainingCFI) const { ManifestItemPtr result; // NB: Package is a friend of CFI, so it can access the components directly if ( cfi._components.size() < 2 ) { HandleError(EPUBError::CFITooShort, "CFI contains less than 2 nodes, so is invalid for package-based lookups."); } // first item directs us to the Spine: check the index against the one we know auto component = cfi._components[0]; if ( component.nodeIndex != _spineCFIIndex ) { HandleError(EPUBError::CFIInvalidSpineLocation, _Str("CFI first node index (spine) is ", component.nodeIndex, " but should be ", _spineCFIIndex)); // fix it ? //component.nodeIndex = _spineCFIIndex; return nullptr; } // second component is the particular spine item component = cfi._components[1]; if ( !component.IsIndirector() ) { HandleError(EPUBError::CFIUnexpectedComponent, "Package-based CFI's second item must be an indirector"); return nullptr; } try { if ( (component.nodeIndex % 2) == 1 ) throw CFI::InvalidCFI("CFI spine item index is odd, which makes no sense for always-empty spine nodes."); SpineItemPtr item = _spine->at((component.nodeIndex/2) - 1); // check and correct any qualifiers item = ConfirmOrCorrectSpineItemQualifier(item, &component); if ( item == nullptr ) { HandleError(EPUBError::CFIIndirectionTargetMissing, "CFI spine node qualifier doesn't match any spine item idref"); return nullptr; } // we know it's not null, because SpineItem::at() throws an exception if out of range result = ManifestItemWithID(item->Idref()); if ( pRemainingCFI != nullptr ) pRemainingCFI->Assign(cfi, 2); } catch (std::out_of_range& e) { HandleError(EPUBError::CFIStepOutOfBounds, _Str("CFI references out-of-range spine item: ", e.what())); } return result; }
const ManifestItem* Package::ManifestItemForCFI(ePub3::CFI &cfi, CFI* pRemainingCFI) const { const ManifestItem* result = nullptr; // NB: Package is a friend of CFI, so it can access the components directly if ( cfi._components.size() < 2 ) throw CFI::InvalidCFI("CFI contains less than 2 nodes, so is invalid for package-based lookups."); // first item directs us to the Spine: check the index against the one we know auto component = cfi._components[0]; if ( component.nodeIndex != _spineCFIIndex ) { throw CFI::InvalidCFI(_Str("CFI first node index (spine) is ", component.nodeIndex, " but should be ", _spineCFIIndex)); } // second component is the particular spine item component = cfi._components[1]; if ( !component.IsIndirector() ) throw CFI::InvalidCFI("Package-based CFI's second item must be an indirector"); try { if ( (component.nodeIndex % 2) == 1 ) throw CFI::InvalidCFI("CFI spine item index is odd, which makes no sense for always-empty spine nodes."); const SpineItem* item = _spine->at(component.nodeIndex/2); // check and correct any qualifiers item = ConfirmOrCorrectSpineItemQualifier(item, &component); if ( item == nullptr ) throw CFI::InvalidCFI("CFI spine node qualifier doesn't match any spine item idref"); // we know it's not null, because SpineItem::at() throws an exception if out of range result = ManifestItemWithID(item->Idref()); if ( pRemainingCFI != nullptr ) pRemainingCFI->Assign(cfi, 2); } catch (std::out_of_range& e) { throw CFI::InvalidCFI("CFI references out-of-range spine item"); } return result; }
bool Package::Unpack() { PackagePtr sharedMe = shared_from_this(); // very basic sanity check xmlNodePtr root = xmlDocGetRootElement(_opf); string rootName(reinterpret_cast<const char*>(root->name)); rootName.tolower(); if ( rootName != "package" ) { HandleError(EPUBError::OPFInvalidPackageDocument); return false; // not an OPF file, innit? } if ( _getProp(root, "version").empty() ) { HandleError(EPUBError::OPFPackageHasNoVersion); } InstallPrefixesFromAttributeValue(_getProp(root, "prefix", ePub3NamespaceURI)); // go through children to determine the CFI index of the <spine> tag static const xmlChar* kSpineName = BAD_CAST "spine"; static const xmlChar* kManifestName = BAD_CAST "manifest"; static const xmlChar* kMetadataName = BAD_CAST "metadata"; _spineCFIIndex = 0; uint32_t idx = 0; xmlNodePtr child = xmlFirstElementChild(root); while ( child != nullptr ) { idx += 2; if ( xmlStrEqual(child->name, kSpineName) ) { _spineCFIIndex = idx; if ( _spineCFIIndex != 6 ) HandleError(EPUBError::OPFSpineOutOfOrder); } else if ( xmlStrEqual(child->name, kManifestName) && idx != 4 ) { HandleError(EPUBError::OPFManifestOutOfOrder); } else if ( xmlStrEqual(child->name, kMetadataName) && idx != 2 ) { HandleError(EPUBError::OPFMetadataOutOfOrder); } child = xmlNextElementSibling(child); } if ( _spineCFIIndex == 0 ) { HandleError(EPUBError::OPFNoSpine); return false; // spineless! } #if EPUB_COMPILER_SUPPORTS(CXX_INITIALIZER_LISTS) XPathWrangler xpath(_opf, {{"opf", OPFNamespace}, {"dc", DCNamespace}}); #else XPathWrangler::NamespaceList __m; __m["opf"] = OPFNamespace; __m["dc"] = DCNamespace; XPathWrangler xpath(_opf, __m); #endif // simple things: manifest and spine items xmlNodeSetPtr manifestNodes = nullptr; xmlNodeSetPtr spineNodes = nullptr; try { manifestNodes = xpath.Nodes("/opf:package/opf:manifest/opf:item"); spineNodes = xpath.Nodes("/opf:package/opf:spine/opf:itemref"); if ( manifestNodes == nullptr ) { HandleError(EPUBError::OPFNoManifestItems); } if ( spineNodes == nullptr ) { HandleError(EPUBError::OPFNoSpineItems); } for ( int i = 0; i < manifestNodes->nodeNr; i++ ) { auto p = std::make_shared<ManifestItem>(sharedMe); if ( p->ParseXML(p, manifestNodes->nodeTab[i]) ) { #if EPUB_HAVE(CXX_MAP_EMPLACE) _manifest.emplace(p->Identifier(), p); #else _manifest[p->Identifier()] = p; #endif StoreXMLIdentifiable(p); } else { // TODO: Need an error here } } // check fallback chains typedef std::map<string, bool> IdentSet; IdentSet idents; for ( auto &pair : _manifest ) { ManifestItemPtr item = pair.second; if ( item->FallbackID().empty() ) continue; idents[item->XMLIdentifier()] = true; while ( !item->FallbackID().empty() ) { if ( idents[item->FallbackID()] ) { HandleError(EPUBError::OPFFallbackChainCircularReference); break; } item = item->Fallback(); } idents.clear(); } SpineItemPtr cur; for ( int i = 0; i < spineNodes->nodeNr; i++ ) { auto next = std::make_shared<SpineItem>(sharedMe); if ( next->ParseXML(next, spineNodes->nodeTab[i]) == false ) { // TODO: need an error code here continue; } // validation of idref auto manifestFound = _manifest.find(next->Idref()); if ( manifestFound == _manifest.end() ) { HandleError(EPUBError::OPFInvalidSpineIdref, _Str(next->Idref(), " does not correspond to a manifest item")); continue; } // validation of spine resource type w/fallbacks ManifestItemPtr manifestItem = next->ManifestItem(); bool isContentDoc = false; do { if ( manifestItem->MediaType() == "application/xhtml+xml" || manifestItem->MediaType() == "image/svg" ) { isContentDoc = true; break; } } while ( (manifestItem = manifestItem->Fallback()) ); if ( !isContentDoc ) HandleError(EPUBError::OPFFallbackChainHasNoContentDocument); StoreXMLIdentifiable(next); if ( cur != nullptr ) { cur->SetNextItem(next); } else { _spine = next; } cur = next; } } catch (const std::system_error& exc) { if ( manifestNodes != nullptr ) xmlXPathFreeNodeSet(manifestNodes); if ( spineNodes != nullptr ) xmlXPathFreeNodeSet(spineNodes); if ( exc.code().category() == epub_spec_category() ) throw; return false; } catch (...) { if ( manifestNodes != nullptr ) xmlXPathFreeNodeSet(manifestNodes); if ( spineNodes != nullptr ) xmlXPathFreeNodeSet(spineNodes); return false; } xmlXPathFreeNodeSet(manifestNodes); xmlXPathFreeNodeSet(spineNodes); // now the metadata, which is slightly more involved due to extensions xmlNodeSetPtr metadataNodes = nullptr; xmlNodeSetPtr refineNodes = xmlXPathNodeSetCreate(nullptr); try { shared_ptr<PropertyHolder> holderPtr = std::dynamic_pointer_cast<PropertyHolder>(sharedMe); metadataNodes = xpath.Nodes("/opf:package/opf:metadata/*"); if ( metadataNodes == nullptr ) HandleError(EPUBError::OPFNoMetadata); bool foundIdentifier = false, foundTitle = false, foundLanguage = false, foundModDate = false; string uniqueIDRef = _getProp(root, "unique-identifier"); if ( uniqueIDRef.empty() ) HandleError(EPUBError::OPFPackageUniqueIDInvalid); for ( int i = 0; i < metadataNodes->nodeNr; i++ ) { xmlNodePtr node = metadataNodes->nodeTab[i]; PropertyPtr p; if ( node->ns != nullptr && xmlStrcmp(node->ns->href, BAD_CAST DCNamespace) == 0 ) { // definitely a main node p = std::make_shared<Property>(holderPtr); } else if ( _getProp(node, "name").size() > 0 ) { // it's an ePub2 item-- ignore it continue; } else if ( _getProp(node, "refines").empty() ) { // not refining anything, so it's a main node p = std::make_shared<Property>(holderPtr); } else { // by elimination it's refining something-- we'll process it later when we know we've got all the main nodes in there xmlXPathNodeSetAdd(refineNodes, node); } if ( p && p->ParseMetaElement(node) ) { switch ( p->Type() ) { case DCType::Identifier: { foundIdentifier = true; if ( !uniqueIDRef.empty() && uniqueIDRef != p->XMLIdentifier() ) HandleError(EPUBError::OPFPackageUniqueIDInvalid); break; } case DCType::Title: { foundTitle = true; break; } case DCType::Language: { foundLanguage = true; break; } case DCType::Custom: { if ( p->PropertyIdentifier() == MakePropertyIRI("modified", "dcterms") ) foundModDate = true; break; } default: break; } AddProperty(p); StoreXMLIdentifiable(p); } } if ( !foundIdentifier ) HandleError(EPUBError::OPFMissingIdentifierMetadata); if ( !foundTitle ) HandleError(EPUBError::OPFMissingTitleMetadata); if ( !foundLanguage ) HandleError(EPUBError::OPFMissingLanguageMetadata); if ( !foundModDate ) HandleError(EPUBError::OPFMissingModificationDateMetadata); for ( int i = 0; i < refineNodes->nodeNr; i++ ) { xmlNodePtr node = refineNodes->nodeTab[i]; string ident = _getProp(node, "refines"); if ( ident.empty() ) { HandleError(EPUBError::OPFInvalidRefinementAttribute, "Empty IRI for 'refines' attribute"); continue; } if ( ident[0] == '#' ) { ident = ident.substr(1); } else { // validation only right now IRI iri(ident); if ( iri.IsEmpty() ) { HandleError(EPUBError::OPFInvalidRefinementAttribute, _Str("#", ident, " is not a valid IRI")); } else if ( iri.IsRelative() == false ) { HandleError(EPUBError::OPFInvalidRefinementAttribute, _Str(iri.IRIString(), " is not a relative IRI")); } continue; } auto found = _xmlIDLookup.find(ident); if ( found == _xmlIDLookup.end() ) { HandleError(EPUBError::OPFInvalidRefinementTarget, _Str("#", ident, " does not reference an item in this document")); continue; } PropertyPtr prop = std::dynamic_pointer_cast<Property>(found->second); if ( prop ) { // it's a property, so this is an extension PropertyExtensionPtr extPtr = std::make_shared<PropertyExtension>(prop); if ( extPtr->ParseMetaElement(node) ) prop->AddExtension(extPtr); } else { // not a property, so treat this as a plain property shared_ptr<PropertyHolder> ptr = std::dynamic_pointer_cast<PropertyHolder>(found->second); if ( ptr ) { prop = std::make_shared<Property>(ptr); if ( prop->ParseMetaElement(node) ) ptr->AddProperty(prop); } } } // now look at the <spine> element for properties xmlNodePtr spineNode = xmlFirstElementChild(root); for ( uint32_t i = 2; i < _spineCFIIndex; i += 2 ) spineNode = xmlNextElementSibling(spineNode); string value = _getProp(spineNode, "page-progression-direction"); if ( !value.empty() ) { PropertyPtr prop = std::make_shared<Property>(holderPtr); prop->SetPropertyIdentifier(MakePropertyIRI("page-progression-direction")); prop->SetValue(value); AddProperty(prop); } } catch (std::system_error& exc) { if ( metadataNodes != nullptr ) xmlXPathFreeNodeSet(metadataNodes); if ( refineNodes != nullptr ) xmlXPathFreeNodeSet(refineNodes); if ( exc.code().category() == epub_spec_category() ) throw; return false; } catch (...) { if ( metadataNodes != nullptr ) xmlXPathFreeNodeSet(metadataNodes); if ( refineNodes != nullptr ) xmlXPathFreeNodeSet(refineNodes); return false; } xmlXPathFreeNodeSet(metadataNodes); xmlXPathFreeNodeSet(refineNodes); // now any content type bindings xmlNodeSetPtr bindingNodes = nullptr; try { bindingNodes = xpath.Nodes("/opf:package/opf:bindings/*"); if ( bindingNodes != nullptr ) { for ( int i = 0; i < bindingNodes->nodeNr; i++ ) { xmlNodePtr node = bindingNodes->nodeTab[i]; if ( xmlStrcasecmp(node->name, MediaTypeElementName) != 0 ) continue; //////////////////////////////////////////////////////////// // ePub Publications 3.0 §3.4.16: The `mediaType` Element // The media-type attribute is required. string mediaType = _getProp(node, "media-type"); if ( mediaType.empty() ) { HandleError(EPUBError::OPFBindingHandlerNoMediaType); throw false; } // Each child mediaType of a bindings element must define a unique // content type in its media-type attribute, and the media type // specified must not be a Core Media Type. if ( _contentHandlers[mediaType].empty() == false ) { // user shouldn't have added manual things yet, but for safety we'll look anyway for ( auto ptr : _contentHandlers[mediaType] ) { if ( typeid(*ptr) == typeid(MediaHandler) ) { HandleError(EPUBError::OPFMultipleBindingsForMediaType); } } } if ( CoreMediaTypes.find(mediaType) != CoreMediaTypes.end() ) { HandleError(EPUBError::OPFCoreMediaTypeBindingEncountered); } // The handler attribute is required string handlerID = _getProp(node, "handler"); if ( handlerID.empty() ) { HandleError(EPUBError::OPFBindingHandlerNotFound); } // The required handler attribute must reference the ID [XML] of an // item in the manifest of the default implementation for this media // type. The referenced item must be an XHTML Content Document. ManifestItemPtr handlerItem = ManifestItemWithID(handlerID); if ( !handlerItem ) { HandleError(EPUBError::OPFBindingHandlerNotFound); } if ( handlerItem->MediaType() != "application/xhtml+xml" ) { HandleError(EPUBError::OPFBindingHandlerInvalidType, _Str("Media handlers must be XHTML content documents, but referenced item has type '", handlerItem->MediaType(), "'.")); } // All XHTML Content Documents designated as handlers must have the // `scripted` property set in their manifest item's `properties` // attribute. if ( handlerItem->HasProperty(ItemProperties::HasScriptedContent) == false ) { HandleError(EPUBError::OPFBindingHandlerNotScripted); } // all good-- install it now _contentHandlers[mediaType].push_back(std::make_shared<MediaHandler>(sharedMe, mediaType, handlerItem->AbsolutePath())); } } } catch (std::exception& exc) { std::cerr << "Exception processing OPF file: " << exc.what() << std::endl; if ( bindingNodes != nullptr ) xmlXPathFreeNodeSet(bindingNodes); throw; } catch (...) { if ( bindingNodes != nullptr ) xmlXPathFreeNodeSet(bindingNodes); return false; } xmlXPathFreeNodeSet(bindingNodes); // now the navigation tables for ( auto item : _manifest ) { if ( !item.second->HasProperty(ItemProperties::Navigation) ) continue; NavigationList tables = NavTablesFromManifestItem(sharedMe, item.second); for ( auto table : tables ) { // have to dynamic_cast these guys to get the right pointer type shared_ptr<class NavigationTable> navTable = std::dynamic_pointer_cast<class NavigationTable>(table); #if EPUB_HAVE(CXX_MAP_EMPLACE) _navigation.emplace(navTable->Type(), navTable); #else _navigation[navTable->Type()] = navTable; #endif } } // lastly, let's set the media support information InitMediaSupport(); return true; }
bool Package::Unpack() { // very basic sanity check xmlNodePtr root = xmlDocGetRootElement(_opf); string rootName(reinterpret_cast<const char*>(root->name)); rootName.tolower(); if ( rootName != "package" ) return false; // not an OPF file, innit? InstallPrefixesFromAttributeValue(_getProp(root, "prefix", ePub3NamespaceURI)); // go through children to determine the CFI index of the <spine> tag static const xmlChar* kSpineName = BAD_CAST "spine"; _spineCFIIndex = 0; xmlNodePtr child = root->children; while ( child != nullptr ) { if ( child->type == XML_ELEMENT_NODE ) { _spineCFIIndex += 2; if ( xmlStrEqual(child->name, kSpineName) ) break; } child = child->next; } if ( _spineCFIIndex == 0 ) return false; // spineless! XPathWrangler xpath(_opf, {{"opf", OPFNamespace}, {"dc", DCNamespace}}); // simple things: manifest and spine items xmlNodeSetPtr manifestNodes = nullptr; xmlNodeSetPtr spineNodes = nullptr; try { manifestNodes = xpath.Nodes("/opf:package/opf:manifest/opf:item"); spineNodes = xpath.Nodes("/opf:package/opf:spine/opf:itemref"); if ( manifestNodes == nullptr || spineNodes == nullptr ) throw false; // looks invalid, or at least unusable, to me for ( int i = 0; i < manifestNodes->nodeNr; i++ ) { ManifestItem *p = new ManifestItem(manifestNodes->nodeTab[i], this); _manifest.emplace(p->Identifier(), p); } SpineItem* cur = nullptr; for ( int i = 0; i < spineNodes->nodeNr; i++ ) { SpineItem* next = new SpineItem(spineNodes->nodeTab[i], this); if ( cur != nullptr ) { cur->SetNextItem(next); } else { _spine.reset(next); } cur = next; } } catch (...) { if ( manifestNodes != nullptr ) xmlXPathFreeNodeSet(manifestNodes); if ( spineNodes != nullptr ) xmlXPathFreeNodeSet(spineNodes); return false; } xmlXPathFreeNodeSet(manifestNodes); xmlXPathFreeNodeSet(spineNodes); // now the metadata, which is slightly more involved due to extensions xmlNodeSetPtr metadataNodes = nullptr; xmlNodeSetPtr refineNodes = xmlXPathNodeSetCreate(nullptr); try { metadataNodes = xpath.Nodes("/opf:package/opf:metadata/*"); if ( metadataNodes == nullptr ) throw false; std::map<string, class Metadata*> metadataByID; for ( int i = 0; i < metadataNodes->nodeNr; i++ ) { xmlNodePtr node = metadataNodes->nodeTab[i]; class Metadata* p = nullptr; if ( node->ns != nullptr && xmlStrcmp(node->ns->href, BAD_CAST DCNamespace) == 0 ) { // definitely a main node p = new class Metadata(node, this); } else if ( _getProp(node, "name").size() > 0 ) { // it's an ePub2 item-- ignore it continue; } else if ( _getProp(node, "refines").empty() ) { // not refining anything, so it's a main node p = new class Metadata(node, this); } else { // by elimination it's refining something-- we'll process it later when we know we've got all the main nodes in there xmlXPathNodeSetAdd(refineNodes, node); } if ( p != nullptr ) { _metadata.push_back(p); if ( !p->Identifier().empty() ) metadataByID[p->Identifier()] = p; } } for ( int i = 0; i < refineNodes->nodeNr; i++ ) { xmlNodePtr node = refineNodes->nodeTab[i]; string ident = _getProp(node, "refines"); if ( ident.empty() ) continue; if ( ident[0] == '#' ) ident = ident.substr(1); auto found = metadataByID.find(ident); if ( found == metadataByID.end() ) continue; found->second->AddExtension(node, this); } } catch (...) { if ( metadataNodes != nullptr ) xmlXPathFreeNodeSet(metadataNodes); if ( refineNodes != nullptr ) xmlXPathFreeNodeSet(refineNodes); return false; } xmlXPathFreeNodeSet(metadataNodes); xmlXPathFreeNodeSet(refineNodes); // now any content type bindings xmlNodeSetPtr bindingNodes = nullptr; try { bindingNodes = xpath.Nodes("/opf:package/opf:bindings/*"); if ( bindingNodes != nullptr ) { for ( int i = 0; i < bindingNodes->nodeNr; i++ ) { xmlNodePtr node = bindingNodes->nodeTab[i]; if ( xmlStrcasecmp(node->name, MediaTypeElementName) != 0 ) continue; //////////////////////////////////////////////////////////// // ePub Publications 3.0 §3.4.16: The `mediaType` Element // The media-type attribute is required. string mediaType = _getProp(node, "media-type"); if ( mediaType.empty() ) { throw std::invalid_argument("mediaType element has missing or empty media-type attribute."); } // Each child mediaType of a bindings element must define a unique // content type in its media-type attribute, and the media type // specified must not be a Core Media Type. if ( _contentHandlers[mediaType].empty() == false ) { // user shouldn't have added manual things yet, but for safety we'll look anyway for ( auto ptr : _contentHandlers[mediaType] ) { if ( typeid(*ptr) == typeid(MediaHandler) ) { throw std::invalid_argument(_Str("Duplicate media handler found for type '", mediaType, "'.")); } } } if ( CoreMediaTypes.find(mediaType) != CoreMediaTypes.end() ) { throw std::invalid_argument("mediaType element specifies an EPUB Core Media Type."); } // The handler attribute is required string handlerID = _getProp(node, "handler"); if ( handlerID.empty() ) { throw std::invalid_argument("mediaType element has missing or empty handler attribute."); } // The required handler attribute must reference the ID [XML] of an // item in the manifest of the default implementation for this media // type. The referenced item must be an XHTML Content Document. const ManifestItem* handlerItem = ManifestItemWithID(handlerID); if ( handlerItem == nullptr ) { throw std::invalid_argument(_Str("mediaType element references non-existent handler with ID '", handlerID, "'.")); } if ( handlerItem->MediaType() != "application/xhtml+xml" ) { throw std::invalid_argument(_Str("Media handlers must be XHTML content documents, but referenced item has type '", handlerItem->MediaType(), "'.")); } // All XHTML Content Documents designated as handlers must have the // `scripted` property set in their manifest item's `properties` // attribute. if ( handlerItem->HasProperty(ItemProperties::HasScriptedContent) == false ) { throw std::invalid_argument("Media handlers must have the `scripted` property."); } // all good-- install it now _contentHandlers[mediaType].push_back(new MediaHandler(this, mediaType, handlerItem->AbsolutePath())); } } } catch (std::exception& exc) { std::cerr << "Exception processing OPF file: " << exc.what() << std::endl; if ( bindingNodes != nullptr ) xmlXPathFreeNodeSet(bindingNodes); return false; } catch (...) { if ( bindingNodes != nullptr ) xmlXPathFreeNodeSet(bindingNodes); return false; } xmlXPathFreeNodeSet(bindingNodes); // now the navigation tables for ( auto item : _manifest ) { if ( !item.second->HasProperty(ItemProperties::Navigation) ) continue; NavigationList tables = NavTablesFromManifestItem(item.second); for ( auto table : tables ) { // have to dynamic_cast these guys to get the right pointer type class NavigationTable* navTable = dynamic_cast<class NavigationTable*>(table); _navigation.emplace(navTable->Type(), navTable); } } return true; }