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https://github.com/JakubMelka/PDF4QT.git
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Document requirements
This commit is contained in:
Jakub Melka
@ -973,4 +973,151 @@ std::optional<PDFLegalAttestation> PDFLegalAttestation::parse(const PDFObjectSto
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return result;
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}
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PDFDocumentRequirements::ValidationResult PDFDocumentRequirements::validate(Requirements supported) const
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{
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ValidationResult result;
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QStringList unsatisfiedRequirements;
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for (const RequirementEntry& entry : m_requirements)
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{
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if (entry.requirement == None)
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{
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// Unrecognized entry, just add the penalty
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result.penalty += entry.penalty;
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continue;
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}
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if (!supported.testFlag(entry.requirement))
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{
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result.penalty += entry.penalty;
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unsatisfiedRequirements << getRequirementName(entry.requirement);
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}
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}
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if (!unsatisfiedRequirements.isEmpty())
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{
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result.message = PDFTranslationContext::tr("Required features %1 are unsupported. Document processing can be limited.").arg(unsatisfiedRequirements.join(", "));
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}
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return result;
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}
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QString PDFDocumentRequirements::getRequirementName(Requirement requirement)
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{
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switch (requirement)
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{
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case OCInteract:
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return PDFTranslationContext::tr("Optional Content User Interaction");
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case OCAutoStates:
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return PDFTranslationContext::tr("Optional Content Usage");
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case AcroFormInteract:
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return PDFTranslationContext::tr("Acrobat Forms");
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case Navigation:
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return PDFTranslationContext::tr("Navigation");
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case Markup:
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return PDFTranslationContext::tr("Markup Annotations");
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case _3DMarkup:
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return PDFTranslationContext::tr("Markup of 3D Content");
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case Multimedia:
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return PDFTranslationContext::tr("Multimedia");
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case U3D:
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return PDFTranslationContext::tr("U3D Format of PDF 3D");
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case PRC:
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return PDFTranslationContext::tr("PRC Format of PDF 3D");
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case Action:
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return PDFTranslationContext::tr("Actions");
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case EnableJavaScripts:
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return PDFTranslationContext::tr("JavaScript");
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case Attachment:
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return PDFTranslationContext::tr("Attached Files");
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case AttachmentEditing:
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return PDFTranslationContext::tr("Attached Files Modification");
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case Collection:
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return PDFTranslationContext::tr("Collections of Attached Files");
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case CollectionEditing:
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return PDFTranslationContext::tr("Collections of Attached Files (editation)");
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case DigSigValidation:
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return PDFTranslationContext::tr("Digital Signature Validation");
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case DigSig:
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return PDFTranslationContext::tr("Apply Digital Signature");
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case DigSigMDP:
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return PDFTranslationContext::tr("Digital Signature Validation (with MDP)");
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case RichMedia:
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return PDFTranslationContext::tr("Rich Media");
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case Geospatial2D:
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return PDFTranslationContext::tr("Geospatial 2D Features");
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case Geospatial3D:
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return PDFTranslationContext::tr("Geospatial 3D Features");
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case DPartInteract:
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return PDFTranslationContext::tr("Navigation for Document Parts");
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case SeparationSimulation:
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return PDFTranslationContext::tr("Separation Simulation");
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case Transitions:
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return PDFTranslationContext::tr("Transitions/Presentations");
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case Encryption:
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return PDFTranslationContext::tr("Encryption");
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default:
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Q_ASSERT(false);
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break;
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}
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return QString();
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}
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PDFDocumentRequirements PDFDocumentRequirements::parse(const PDFObjectStorage* storage, const PDFObject& object)
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{
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PDFDocumentRequirements requirements;
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PDFDocumentDataLoaderDecorator loader(storage);
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requirements.m_requirements = loader.readObjectList<RequirementEntry>(object);
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return requirements;
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}
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PDFDocumentRequirements::RequirementEntry PDFDocumentRequirements::RequirementEntry::parse(const PDFObjectStorage* storage, const PDFObject& object)
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{
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RequirementEntry entry;
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if (const PDFDictionary* dictionary = storage->getDictionaryFromObject(object))
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{
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PDFDocumentDataLoaderDecorator loader(storage);
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constexpr const std::array requirementTypes = {
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std::pair<const char*, Requirement>{ "OCInteract", OCInteract },
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std::pair<const char*, Requirement>{ "OCAutoStates", OCAutoStates },
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std::pair<const char*, Requirement>{ "AcroFormInteract", AcroFormInteract },
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std::pair<const char*, Requirement>{ "Navigation", Navigation },
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std::pair<const char*, Requirement>{ "Markup", Markup },
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std::pair<const char*, Requirement>{ "3DMarkup", _3DMarkup },
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std::pair<const char*, Requirement>{ "Multimedia", Multimedia },
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std::pair<const char*, Requirement>{ "U3D", U3D },
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std::pair<const char*, Requirement>{ "PRC", PRC },
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std::pair<const char*, Requirement>{ "Action", Action },
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std::pair<const char*, Requirement>{ "EnableJavaScripts", EnableJavaScripts },
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std::pair<const char*, Requirement>{ "Attachment", Attachment },
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std::pair<const char*, Requirement>{ "AttachmentEditing", AttachmentEditing },
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std::pair<const char*, Requirement>{ "Collection", Collection },
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std::pair<const char*, Requirement>{ "CollectionEditing", CollectionEditing },
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std::pair<const char*, Requirement>{ "DigSigValidation", DigSigValidation },
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std::pair<const char*, Requirement>{ "DigSig", DigSig },
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std::pair<const char*, Requirement>{ "DigSigMDP", DigSigMDP },
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std::pair<const char*, Requirement>{ "RichMedia", RichMedia },
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std::pair<const char*, Requirement>{ "Geospatial2D", Geospatial2D },
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std::pair<const char*, Requirement>{ "Geospatial3D", Geospatial3D },
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std::pair<const char*, Requirement>{ "DPartInteract", DPartInteract },
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std::pair<const char*, Requirement>{ "SeparationSimulation", SeparationSimulation },
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std::pair<const char*, Requirement>{ "Transitions", Transitions },
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std::pair<const char*, Requirement>{ "Encryption", Encryption }
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};
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entry.requirement = loader.readEnumByName(dictionary->get("S"), requirementTypes.begin(), requirementTypes.end(), None);
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entry.handler = dictionary->get("RH");
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entry.version = loader.readNameFromDictionary(dictionary, "V");
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entry.penalty = loader.readIntegerFromDictionary(dictionary, "Penalty", 100);
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}
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return entry;
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}
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} // namespace pdf
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@ -450,6 +450,82 @@ private:
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QString m_attestation;
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};
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/// Document can contain requirements for viewer application. This class
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/// verifies, if this library and viewer application satisfies these requirements
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/// and returns result.
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class PDFFORQTLIBSHARED_EXPORT PDFDocumentRequirements
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{
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public:
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enum Requirement
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{
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None = 0x00000000,
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OCInteract = 0x00000001,
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OCAutoStates = 0x00000002,
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AcroFormInteract = 0x00000004,
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Navigation = 0x00000008,
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Markup = 0x00000010,
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_3DMarkup = 0x00000020,
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Multimedia = 0x00000040,
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U3D = 0x00000080,
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PRC = 0x00000100,
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Action = 0x00000200,
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EnableJavaScripts = 0x00000400,
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Attachment = 0x00000800,
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AttachmentEditing = 0x00001000,
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Collection = 0x00002000,
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CollectionEditing = 0x00004000,
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DigSigValidation = 0x00008000,
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DigSig = 0x00010000,
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DigSigMDP = 0x00020000,
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RichMedia = 0x00040000,
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Geospatial2D = 0x00080000,
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Geospatial3D = 0x00100000,
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DPartInteract = 0x00200000,
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SeparationSimulation = 0x00400000,
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Transitions = 0x00800000,
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Encryption = 0x01000000
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};
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Q_DECLARE_FLAGS(Requirements, Requirement)
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struct RequirementEntry
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{
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Requirement requirement = None;
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PDFInteger penalty = 100;
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QByteArray version;
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PDFObject handler;
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static RequirementEntry parse(const PDFObjectStorage* storage, const PDFObject& object);
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};
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struct ValidationResult
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{
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Requirements unsatisfied = None;
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PDFInteger penalty = 0;
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QString message;
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bool isOk() const { return penalty < 100; }
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bool isError() const { return !isOk(); }
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bool isWarning() const { return isOk() && !message.isEmpty(); }
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};
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/// Validates requirements against supported requirements
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ValidationResult validate(Requirements supported) const;
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/// Returns string version of requirement
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static QString getRequirementName(Requirement requirement);
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/// Parses document requirements. If error occurs, empty
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/// document requirements are returned.
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/// \param storage Storage
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/// \param object Object
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static PDFDocumentRequirements parse(const PDFObjectStorage* storage, const PDFObject& object);
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private:
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std::vector<RequirementEntry> m_requirements;
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};
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class PDFFORQTLIBSHARED_EXPORT PDFCatalog
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{
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public:
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@ -1051,6 +1051,23 @@ void PDFViewerMainWindow::onDocumentReadingFinished()
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pdf::PDFModifiedDocument document(m_pdfDocument.data(), m_optionalContentActivity);
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setDocument(document);
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pdf::PDFDocumentRequirements requirements = pdf::PDFDocumentRequirements::parse(&m_pdfDocument->getStorage(), m_pdfDocument->getCatalog()->getRequirements());
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constexpr pdf::PDFDocumentRequirements::Requirements requirementFlags = pdf::PDFDocumentRequirements::OCInteract |
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pdf::PDFDocumentRequirements::OCAutoStates |
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pdf::PDFDocumentRequirements::Navigation |
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pdf::PDFDocumentRequirements::Attachment |
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pdf::PDFDocumentRequirements::DigSigValidation |
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pdf::PDFDocumentRequirements::Encryption;
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pdf::PDFDocumentRequirements::ValidationResult requirementResult = requirements.validate(requirementFlags);
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if (requirementResult.isError())
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{
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QMessageBox::critical(this, tr("PDF Viewer"), requirementResult.message);
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}
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else if (requirementResult.isWarning())
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{
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QMessageBox::warning(this, tr("PDF Viewer"), requirementResult.message);
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}
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statusBar()->showMessage(tr("Document '%1' was successfully loaded!").arg(m_fileInfo.fileName), 4000);
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break;
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}
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