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	diff --git a/src/core/messagepart.cpp b/src/core/messagepart.cpp
	index 55f79b6..b3747de 100644
	--- a/src/core/messagepart.cpp
	+++ b/src/core/messagepart.cpp
	@@ -1,983 +1,975 @@
	// SPDX-FileCopyrightText: 2015 Sandro Knauß <knauss@kolabsys.com>
	// SPDX-FileCopyrightText: 2017 Christian Mollekopf <mollekopf@kolabsys.com>
	// SPDX-License-Identifier: LGPL-2.0-or-later

	#include "messagepart.h"
	#include "cryptohelper.h"
	#include "mimetreeparser_core_debug.h"
	#include "objecttreeparser.h"

	#include "utils.h"

	#include <KLocalizedString>
	#include <KMime/Content>
	#include <Libkleo/Compliance>
	#include <Libkleo/KeyCache>

	#include <QGpgME/DN>
	#include <QGpgME/DecryptVerifyJob>
	#include <QGpgME/Protocol>
	#include <QGpgME/VerifyDetachedJob>
	#include <QGpgME/VerifyOpaqueJob>

	#include <QStringDecoder>

	#include <gpgme++/key.h>
	#include <gpgme++/keylistresult.h>
	#include <gpgme.h>
	#include <libkleo/formatting.h>

	using namespace MimeTreeParser;

	//------MessagePart-----------------------
	MessagePart::MessagePart(ObjectTreeParser otp, const QString &text, KMime::Content node)
	: mText(text)
	, mOtp(otp)
	, mParentPart(nullptr)
	, mNode(node) // only null for messagepartlist
	, mError(NoError)
	, mRoot(false)
	{
	}

	MessagePart::~MessagePart()
	{
	for (auto n : std::as_const(mNodesToDelete)) {
	delete n;
	}
	}

	MessagePart::Disposition MessagePart::disposition() const
	{
	if (!mNode) {
	return Invalid;
	}
	const auto cd = mNode->contentDisposition(false);
	if (!cd) {
	return Invalid;
	}
	switch (cd->disposition()) {
	case KMime::Headers::CDinline:
	return Inline;
	case KMime::Headers::CDattachment:
	return Attachment;
	default:
	return Invalid;
	}
	}

	QString MessagePart::filename() const
	{
	if (!mNode) {
	return {};
	}

	if (const auto cd = mNode->contentDisposition(false)) {
	const auto name = cd->filename();
	// Allow for a fallback for mails that have a ContentDisposition header, but don't set the filename anyways.
	// Not the recommended way, but exists.
	if (!name.isEmpty()) {
	return name;
	}
	}
	if (const auto ct = mNode->contentType(false)) {
	return ct->name();
	}
	return {};
	}

	static KMime::Headers::ContentType contentType(KMime::Content node)
	{
	if (node) {
	return node->contentType(false);
	}
	return nullptr;
	}

	QByteArray MessagePart::charset() const
	{
	if (!mNode) {
	return QByteArrayLiteral("us-ascii");
	}
	if (auto ct = contentType(mNode)) {
	return ct->charset();
	}
	// Per rfc2045 us-ascii is the default
	return QByteArrayLiteral("us-ascii");
	}

	QByteArray MessagePart::mimeType() const
	{
	if (auto ct = contentType(mNode)) {
	return ct->mimeType();
	}
	return {};
	}

	bool MessagePart::isText() const
	{
	if (auto ct = contentType(mNode)) {
	return ct->isText();
	}
	return false;
	}

	MessagePart::Error MessagePart::error() const
	{
	return mError;
	}

	QString MessagePart::errorString() const
	{
	return mMetaData.errorText;
	}

	PartMetaData *MessagePart::partMetaData()
	{
	return &mMetaData;
	}

	bool MessagePart::isAttachment() const
	{
	if (mNode) {
	return KMime::isAttachment(mNode);
	}
	return false;
	}

	KMime::Content *MessagePart::node() const
	{
	return mNode;
	}

	void MessagePart::setIsRoot(bool root)
	{
	mRoot = root;
	}

	bool MessagePart::isRoot() const
	{
	return mRoot;
	}

	QString MessagePart::text() const
	{
	return mText;
	}

	void MessagePart::setText(const QString &text)
	{
	mText = text;
	}

	bool MessagePart::isHtml() const
	{
	return false;
	}

	MessagePart *MessagePart::parentPart() const
	{
	return mParentPart;
	}

	void MessagePart::setParentPart(MessagePart *parentPart)
	{
	mParentPart = parentPart;
	}

	QString MessagePart::htmlContent() const
	{
	return text();
	}

	QString MessagePart::plaintextContent() const
	{
	return text();
	}

	void MessagePart::parseInternal(KMime::Content *node, bool onlyOneMimePart)
	{
	auto subMessagePart = mOtp->parseObjectTreeInternal(node, onlyOneMimePart);
	mRoot = subMessagePart->isRoot();
	for (const auto &part : std::as_const(subMessagePart->subParts())) {
	appendSubPart(part);
	}
	}

	void MessagePart::parseInternal(const QByteArray &data)
	{
	auto tempNode = new KMime::Content();

	const auto lfData = KMime::CRLFtoLF(data);
	// We have to deal with both bodies and full parts. In inline encrypted/signed parts we can have nested parts,
	// or just plain-text, and both ends up here. setContent defaults to setting only the header, so we have to avoid this.
	if (lfData.contains("\n\n")) {
	tempNode->setContent(lfData);
	} else {
	tempNode->setBody(lfData);
	}
	tempNode->parse();
	tempNode->contentType()->setCharset(charset());
	bindLifetime(tempNode);

	if (!tempNode->head().isEmpty()) {
	tempNode->contentDescription()->from7BitString(QByteArrayLiteral("temporary node"));
	}

	parseInternal(tempNode);
	}

	QString MessagePart::renderInternalText() const
	{
	QString text;
	for (const auto &mp : subParts()) {
	text += mp->text();
	}
	return text;
	}

	void MessagePart::appendSubPart(const MessagePart::Ptr &messagePart)
	{
	messagePart->setParentPart(this);
	mBlocks.append(messagePart);
	}

	const QList<MessagePart::Ptr> &MessagePart::subParts() const
	{
	return mBlocks;
	}

	bool MessagePart::hasSubParts() const
	{
	return !mBlocks.isEmpty();
	}

	QList<SignedMessagePart *> MessagePart::signatures() const
	{
	QList<SignedMessagePart *> list;
	if (auto sig = dynamic_cast<SignedMessagePart >(const_cast<MessagePart >(this))) {
	list << sig;
	}
	auto parent = parentPart();
	while (parent) {
	if (auto sig = dynamic_cast<SignedMessagePart *>(parent)) {
	list << sig;
	}
	parent = parent->parentPart();
	}
	return list;
	}

	QList<EncryptedMessagePart *> MessagePart::encryptions() const
	{
	QList<EncryptedMessagePart *> list;
	if (auto sig = dynamic_cast<EncryptedMessagePart >(const_cast<MessagePart >(this))) {
	list << sig;
	}
	auto parent = parentPart();
	while (parent) {
	if (auto sig = dynamic_cast<EncryptedMessagePart *>(parent)) {
	list << sig;
	}
	parent = parent->parentPart();
	}
	return list;
	}

	KMMsgEncryptionState MessagePart::encryptionState() const
	{
	if (!encryptions().isEmpty()) {
	return KMMsgFullyEncrypted;
	}
	return KMMsgNotEncrypted;
	}

	KMMsgSignatureState MessagePart::signatureState() const
	{
	if (!signatures().isEmpty()) {
	return KMMsgFullySigned;
	}
	return KMMsgNotSigned;
	}

	void MessagePart::bindLifetime(KMime::Content *node)
	{
	mNodesToDelete << node;
	}

	KMime::Headers::Base MimeTreeParser::MessagePart::header(const char header) const
	{
	if (node() && node()->hasHeader(header)) {
	return node()->headerByType(header);
	}
	if (auto parent = parentPart()) {
	return parent->header(header);
	}

	return nullptr;
	}

	//-----MessagePartList----------------------
	MessagePartList::MessagePartList(ObjectTreeParser otp, KMime::Content node)
	: MessagePart(otp, QString(), node)
	{
	}

	QString MessagePartList::text() const
	{
	return renderInternalText();
	}

	QString MessagePartList::plaintextContent() const
	{
	return QString();
	}

	QString MessagePartList::htmlContent() const
	{
	return QString();
	}

	//-----TextMessageBlock----------------------

	TextMessagePart::TextMessagePart(ObjectTreeParser otp, KMime::Content node)
	: MessagePartList(otp, node)
	, mSignatureState(KMMsgSignatureStateUnknown)
	, mEncryptionState(KMMsgEncryptionStateUnknown)
	{
	if (!mNode) {
	qCWarning(MIMETREEPARSER_CORE_LOG) << "not a valid node";
	return;
	}

	parseContent();
	}

	void TextMessagePart::parseContent()
	{
	mSignatureState = KMMsgNotSigned;
	mEncryptionState = KMMsgNotEncrypted;
	const auto blocks = prepareMessageForDecryption(mNode->decodedContent());
	// We also get blocks for unencrypted messages
	if (!blocks.isEmpty()) {
	auto aCodec = QStringDecoder(mOtp->codecNameFor(mNode).constData());
	const auto cryptProto = QGpgME::openpgp();

	/* The (overall) signature/encrypted status is broken
	* if one unencrypted part is at the beginning or in the middle
	* because mailmain adds an unencrypted part at the end this should not break the overall status
	*
	* That's why we first set the tmp status and if one crypted/signed block comes afterwards, than
	* the status is set to unencryped
	*/
	bool fullySignedOrEncrypted = true;
	bool fullySignedOrEncryptedTmp = true;

	for (const auto &block : blocks) {
	if (!fullySignedOrEncryptedTmp) {
	fullySignedOrEncrypted = false;
	}

	if (block.type() == NoPgpBlock && !block.text().trimmed().isEmpty()) {
	fullySignedOrEncryptedTmp = false;
	appendSubPart(MessagePart::Ptr(new MessagePart(mOtp, aCodec.decode(KMime::CRLFtoLF(block.text())))));
	} else if (block.type() == PgpMessageBlock) {
	auto content = new KMime::Content;
	content->setBody(block.text());
	content->parse();
	content->contentType()->setCharset(charset());
	EncryptedMessagePart::Ptr mp(new EncryptedMessagePart(mOtp, QString(), cryptProto, content, content, false));
	mp->bindLifetime(content);
	mp->setIsEncrypted(true);
	appendSubPart(mp);
	} else if (block.type() == ClearsignedBlock) {
	auto content = new KMime::Content;
	content->setBody(block.text());
	content->parse();
	content->contentType()->setCharset(charset());
	SignedMessagePart::Ptr mp(new SignedMessagePart(mOtp, cryptProto, nullptr, content, false));
	mp->bindLifetime(content);
	appendSubPart(mp);
	} else {
	continue;
	}

	const auto mp = subParts().last().staticCast<MessagePart>();
	const PartMetaData *messagePart(mp->partMetaData());

	if (!messagePart->isEncrypted && !messagePart->isSigned() && !block.text().trimmed().isEmpty()) {
	mp->setText(aCodec.decode(KMime::CRLFtoLF(block.text())));
	}

	if (messagePart->isEncrypted) {
	mEncryptionState = KMMsgPartiallyEncrypted;
	}

	if (messagePart->isSigned()) {
	mSignatureState = KMMsgPartiallySigned;
	}
	}

	// Do we have an fully Signed/Encrypted Message?
	if (fullySignedOrEncrypted) {
	if (mSignatureState == KMMsgPartiallySigned) {
	mSignatureState = KMMsgFullySigned;
	}
	if (mEncryptionState == KMMsgPartiallyEncrypted) {
	mEncryptionState = KMMsgFullyEncrypted;
	}
	}
	}
	}

	KMMsgEncryptionState TextMessagePart::encryptionState() const
	{
	if (mEncryptionState == KMMsgNotEncrypted) {
	return MessagePart::encryptionState();
	}
	return mEncryptionState;
	}

	KMMsgSignatureState TextMessagePart::signatureState() const
	{
	if (mSignatureState == KMMsgNotSigned) {
	return MessagePart::signatureState();
	}
	return mSignatureState;
	}

	//-----AttachmentMessageBlock----------------------

	AttachmentMessagePart::AttachmentMessagePart(ObjectTreeParser otp, KMime::Content node)
	: TextMessagePart(otp, node)
	{
	}

	//-----HtmlMessageBlock----------------------

	HtmlMessagePart::HtmlMessagePart(ObjectTreeParser otp, KMime::Content node)
	: MessagePart(otp, QString(), node)
	{
	if (!mNode) {
	qCWarning(MIMETREEPARSER_CORE_LOG) << "not a valid node";
	return;
	}

	setText(QStringDecoder(mOtp->codecNameFor(mNode).constData()).decode(KMime::CRLFtoLF(mNode->decodedContent())));
	}

	//-----MimeMessageBlock----------------------

	MimeMessagePart::MimeMessagePart(ObjectTreeParser otp, KMime::Content node, bool onlyOneMimePart)
	: MessagePart(otp, QString(), node)
	{
	if (!mNode) {
	qCWarning(MIMETREEPARSER_CORE_LOG) << "not a valid node";
	return;
	}

	parseInternal(mNode, onlyOneMimePart);
	}

	MimeMessagePart::~MimeMessagePart()
	{
	}

	QString MimeMessagePart::text() const
	{
	return renderInternalText();
	}

	QString MimeMessagePart::plaintextContent() const
	{
	return QString();
	}

	QString MimeMessagePart::htmlContent() const
	{
	return QString();
	}

	//-----AlternativeMessagePart----------------------

	AlternativeMessagePart::AlternativeMessagePart(ObjectTreeParser otp, KMime::Content node)
	: MessagePart(otp, QString(), node)
	{
	if (auto dataIcal = findTypeInDirectChildren(mNode, "text/calendar")) {
	mChildParts[MultipartIcal] = MimeMessagePart::Ptr(new MimeMessagePart(mOtp, dataIcal, true));
	}

	if (auto dataText = findTypeInDirectChildren(mNode, "text/plain")) {
	mChildParts[MultipartPlain] = MimeMessagePart::Ptr(new MimeMessagePart(mOtp, dataText, true));
	}

	if (auto dataHtml = findTypeInDirectChildren(mNode, "text/html")) {
	mChildParts[MultipartHtml] = MimeMessagePart::Ptr(new MimeMessagePart(mOtp, dataHtml, true));
	} else {
	// If we didn't find the HTML part as the first child of the multipart/alternative, it might
	// be that this is a HTML message with images, and text/plain and multipart/related are the
	// immediate children of this multipart/alternative node.
	// In this case, the HTML node is a child of multipart/related.
	// In the case of multipart/related we don't expect multiple html parts, it is usually used to group attachments
	// with html content.
	//
	// In any case, this is not a complete implementation of MIME, but an approximation for the kind of mails we actually see in the wild.
	auto data = [&] {
	if (auto d = findTypeInDirectChildren(mNode, "multipart/related")) {
	return d;
	}
	return findTypeInDirectChildren(mNode, "multipart/mixed");
	}();
	if (data) {
	QString htmlContent;
	const auto parts = data->contents();
	for (auto p : parts) {
	if ((!p->contentType()->isEmpty()) && (p->contentType()->mimeType() == "text/html")) {
	htmlContent += MimeMessagePart(mOtp, p, true).text();
	} else if (KMime::isAttachment(p)) {
	appendSubPart(MimeMessagePart::Ptr(new MimeMessagePart(otp, p, true)));
	}
	}
	mChildParts[MultipartHtml] = MessagePart::Ptr(new MessagePart(mOtp, htmlContent, nullptr));
	}
	}
	}

	AlternativeMessagePart::~AlternativeMessagePart()
	{
	}

	QList<AlternativeMessagePart::HtmlMode> AlternativeMessagePart::availableModes()
	{
	return mChildParts.keys();
	}

	QString AlternativeMessagePart::text() const
	{
	if (mChildParts.contains(MultipartPlain)) {
	return mChildParts[MultipartPlain]->text();
	}
	return QString();
	}

	bool AlternativeMessagePart::isHtml() const
	{
	return mChildParts.contains(MultipartHtml);
	}

	QString AlternativeMessagePart::plaintextContent() const
	{
	return text();
	}

	QString AlternativeMessagePart::htmlContent() const
	{
	if (mChildParts.contains(MultipartHtml)) {
	return mChildParts[MultipartHtml]->text();
	} else {
	return plaintextContent();
	}
	}

	QString AlternativeMessagePart::icalContent() const
	{
	if (mChildParts.contains(MultipartIcal)) {
	return mChildParts[MultipartIcal]->text();
	}
	return {};
	}

	//-----CertMessageBlock----------------------

	CertMessagePart::CertMessagePart(ObjectTreeParser otp, KMime::Content node, QGpgME::Protocol *cryptoProto)
	: MessagePart(otp, QString(), node)
	, mCryptoProto(cryptoProto)
	{
	if (!mNode) {
	qCWarning(MIMETREEPARSER_CORE_LOG) << "not a valid node";
	return;
	}
	}

	CertMessagePart::~CertMessagePart()
	{
	}

	QString CertMessagePart::text() const
	{
	return QString();
	}

	//-----SignedMessageBlock---------------------
	SignedMessagePart::SignedMessagePart(ObjectTreeParser *otp,
	const QGpgME::Protocol *cryptoProto,
	KMime::Content *node,
	KMime::Content *signedData,
	bool parseAfterDecryption)
	: MessagePart(otp, {}, node)
	, mParseAfterDecryption(parseAfterDecryption)
	, mCryptoProto(cryptoProto)
	, mSignedData(signedData)
	{
	mMetaData.status = i18ndc("mimetreeparser", "@info:status", "Wrong Crypto Plug-In.");
	- qWarning() << "created" << this;
	}

	-SignedMessagePart::~SignedMessagePart()
	-{
	- qWarning() << "desctrued" << this;
	-}
	+SignedMessagePart::~SignedMessagePart() = default;

	static QString prettifyDN(const char *uid)
	{
	// We used to use QGpgME::DN::prettyDN here. But I'm not sure what we actually need it for.
	return QString::fromUtf8(uid);
	}

	const QGpgME::Protocol *SignedMessagePart::cryptoProto() const
	{
	return mCryptoProto;
	}

	void SignedMessagePart::startVerification()
	{
	if (!mSignedData) {
	return;
	}

	mMetaData.status = i18ndc("mimetreeparser", "@info:status", "Wrong Crypto Plug-In.");
	mMetaData.isEncrypted = false;
	mMetaData.isDecryptable = false;

	auto codec = QStringDecoder(mOtp->codecNameFor(mSignedData).constData());

	// If we have a mNode, this is a detached signature
	if (mNode) {
	const auto signature = mNode->decodedContent();

	// This is necessary in case the original data contained CRLF's. Otherwise the signature will not match the data (since KMIME normalizes to LF)
	const QByteArray signedData = KMime::LFtoCRLF(mSignedData->encodedContent());

	const auto job = mCryptoProto->verifyDetachedJob();
	setVerificationResult(job->exec(signature, signedData), signedData);
	job->deleteLater();
	setText(codec.decode(KMime::CRLFtoLF(signedData)));
	} else {
	QByteArray outdata;
	const auto job = mCryptoProto->verifyOpaqueJob();
	setVerificationResult(job->exec(mSignedData->decodedContent(), outdata), outdata);
	job->deleteLater();
	setText(codec.decode(KMime::CRLFtoLF(outdata)));
	}
	-
	- if (!mMetaData.isSigned()) {
	- mMetaData.creationTime = QDateTime();
	- }
	}

	void SignedMessagePart::setVerificationResult(const GpgME::VerificationResult &result, const QByteArray &signedData)
	{
	mMetaData.verificationResult = result;
	qWarning() << "set mMetaData.verificationResult" << this;

	if (mMetaData.isSigned()) {
	if (!signedData.isEmpty() && mParseAfterDecryption) {
	parseInternal(signedData);
	}
	}
	}

	QString SignedMessagePart::plaintextContent() const
	{
	if (!mNode) {
	return MessagePart::text();
	} else {
	return QString();
	}
	}

	QString SignedMessagePart::htmlContent() const
	{
	if (!mNode) {
	return MessagePart::text();
	} else {
	return QString();
	}
	}

	//-----CryptMessageBlock---------------------
	EncryptedMessagePart::EncryptedMessagePart(ObjectTreeParser *otp,
	const QString &text,
	const QGpgME::Protocol *cryptoProto,
	KMime::Content *node,
	KMime::Content *encryptedNode,
	bool parseAfterDecryption)
	: MessagePart(otp, text, node)
	, mParseAfterDecryption(parseAfterDecryption)
	, mPassphraseError(false)
	, mNoSecKey(false)
	, mDecryptMessage(false)
	, mCryptoProto(cryptoProto)
	, mEncryptedNode(encryptedNode)
	{
	mMetaData.isEncrypted = false;
	mMetaData.isDecryptable = false;
	mMetaData.status = i18ndc("mimetreeparser", "@info:status", "Wrong Crypto Plug-In.");
	}

	void EncryptedMessagePart::setIsEncrypted(bool encrypted)
	{
	mMetaData.isEncrypted = encrypted;
	}

	bool EncryptedMessagePart::isEncrypted() const
	{
	return mMetaData.isEncrypted;
	}

	const QGpgME::Protocol *EncryptedMessagePart::cryptoProto() const
	{
	return mCryptoProto;
	}

	void EncryptedMessagePart::setDecryptMessage(bool decrypt)
	{
	mDecryptMessage = decrypt;
	}

	bool EncryptedMessagePart::decryptMessage() const
	{
	return mDecryptMessage;
	}

	bool EncryptedMessagePart::isDecryptable() const
	{
	return mMetaData.isDecryptable;
	}

	bool EncryptedMessagePart::isNoSecKey() const
	{
	return mNoSecKey;
	}

	bool EncryptedMessagePart::passphraseError() const
	{
	return mPassphraseError;
	}

	bool EncryptedMessagePart::decrypt(KMime::Content &data)
	{
	mError = NoError;
	mMetaData.errorText.clear();
	// FIXME
	// mMetaData.auditLogError = GpgME::Error();
	mMetaData.auditLog.clear();

	const QByteArray ciphertext = data.decodedContent();
	QByteArray plainText;
	auto job = mCryptoProto->decryptVerifyJob();
	const std::pair<GpgME::DecryptionResult, GpgME::VerificationResult> p = job->exec(ciphertext, plainText);
	job->deleteLater();
	auto decryptResult = p.first;
	auto verifyResult = p.second;
	mMetaData.verificationResult = verifyResult;

	// Normalize CRLF's
	plainText = KMime::CRLFtoLF(plainText);
	auto codec = QStringDecoder(mOtp->codecNameFor(&data).constData());
	const auto decoded = codec.decode(plainText);

	if (partMetaData()->isSigned()) {
	// We simply attach a signed message part to indicate that this content is also signed
	// We're forwarding mNode to not loose the encoding information
	auto subPart = SignedMessagePart::Ptr(new SignedMessagePart(mOtp, mCryptoProto, mNode, nullptr));
	subPart->setText(decoded);
	subPart->setVerificationResult(verifyResult, plainText);
	appendSubPart(subPart);
	}

	mDecryptRecipients.clear();
	bool cannotDecrypt = false;
	bool bDecryptionOk = !decryptResult.error();

	for (const auto &recipient : decryptResult.recipients()) {
	if (!recipient.status()) {
	bDecryptionOk = true;
	}
	GpgME::Key key;
	key = Kleo::KeyCache::instance()->findByKeyIDOrFingerprint(recipient.keyID());
	if (key.isNull()) {
	auto ret = Kleo::KeyCache::instance()->findSubkeysByKeyID({recipient.keyID()});
	if (ret.size() == 1) {
	key = ret.front().parent();
	}
	if (key.isNull()) {
	qCDebug(MIMETREEPARSER_CORE_LOG) << "Found no Key for KeyID " << recipient.keyID();
	}
	}
	mDecryptRecipients.emplace_back(recipient, key);
	}

	if (!bDecryptionOk && partMetaData()->isSigned()) {
	// Only a signed part
	partMetaData()->isEncrypted = false;
	bDecryptionOk = true;
	mDecryptedData = plainText;
	} else {
	mPassphraseError = decryptResult.error().isCanceled() \|\| decryptResult.error().code() == GPG_ERR_BAD_PASSPHRASE;
	mMetaData.isEncrypted = bDecryptionOk \|\| decryptResult.error().code() != GPG_ERR_NO_DATA;

	if (decryptResult.error().isCanceled()) {
	setDecryptMessage(false);
	}

	partMetaData()->errorText = QString::fromLocal8Bit(decryptResult.error().asString());
	if (Kleo::DeVSCompliance::isCompliant()) {
	partMetaData()->isCompliant = decryptResult.isDeVs();
	partMetaData()->compliance = Kleo::DeVSCompliance::name(decryptResult.isDeVs());
	} else {
	partMetaData()->isCompliant = true;
	}
	if (partMetaData()->isEncrypted && decryptResult.numRecipients() > 0) {
	partMetaData()->keyId = decryptResult.recipient(0).keyID();
	}

	if (bDecryptionOk) {
	mDecryptedData = plainText;
	} else {
	mNoSecKey = true;
	const auto decryRecipients = decryptResult.recipients();
	for (const GpgME::DecryptionResult::Recipient &recipient : decryRecipients) {
	mNoSecKey &= (recipient.status().code() == GPG_ERR_NO_SECKEY);
	}
	if (!mPassphraseError && !mNoSecKey) { // GpgME do not detect passphrase error correctly
	mPassphraseError = true;
	}
	}
	}

	if (!bDecryptionOk) {
	QString cryptPlugLibName;
	mError = UnknownError;
	if (mCryptoProto) {
	cryptPlugLibName = mCryptoProto->name();
	}

	if (mNoSecKey) {
	mError = NoKeyError;
	}

	if (mPassphraseError) {
	mError = PassphraseError;
	}

	if (!mCryptoProto) {
	partMetaData()->errorText = i18n("No appropriate crypto plug-in was found.");
	} else if (cannotDecrypt) {
	partMetaData()->errorText = i18n("Crypto plug-in \"%1\" cannot decrypt messages.", cryptPlugLibName);
	} else if (!passphraseError()) {
	partMetaData()->errorText = i18n("Crypto plug-in \"%1\" could not decrypt the data.", cryptPlugLibName) + QLatin1StringView("<br />")
	+ i18n("Error: %1", partMetaData()->errorText);
	}
	}
	return bDecryptionOk;
	}

	void EncryptedMessagePart::startDecryption(KMime::Content *data)
	{
	mMetaData.isEncrypted = true;
	mMetaData.isDecryptable = decrypt(*data);

	if (mParseAfterDecryption && !mMetaData.isSigned()) {
	parseInternal(mDecryptedData);
	} else {
	setText(QString::fromUtf8(mDecryptedData.constData()));
	}
	}

	void EncryptedMessagePart::startDecryption()
	{
	if (mEncryptedNode) {
	startDecryption(mEncryptedNode);
	} else {
	startDecryption(mNode);
	}
	}

	std::vector<std::pair<GpgME::DecryptionResult::Recipient, GpgME::Key>> EncryptedMessagePart::decryptRecipients() const
	{
	return mDecryptRecipients;
	}

	QString EncryptedMessagePart::plaintextContent() const
	{
	if (!mNode) {
	return MessagePart::text();
	} else {
	return QString();
	}
	}

	QString EncryptedMessagePart::htmlContent() const
	{
	if (!mNode) {
	return MessagePart::text();
	} else {
	return QString();
	}
	}

	QString EncryptedMessagePart::text() const
	{
	if (hasSubParts()) {
	auto _mp = (subParts()[0]).dynamicCast<SignedMessagePart>();
	if (_mp) {
	return _mp->text();
	}
	}

	return MessagePart::text();
	}

	EncapsulatedRfc822MessagePart::EncapsulatedRfc822MessagePart(ObjectTreeParser otp, KMime::Content node, const KMime::Message::Ptr &message)
	: MessagePart(otp, QString(), node)
	, mMessage(message)
	{
	mMetaData.isEncrypted = false;
	mMetaData.isEncapsulatedRfc822Message = true;

	if (!mMessage) {
	qCWarning(MIMETREEPARSER_CORE_LOG) << "Node is of type message/rfc822 but doesn't have a message!";
	return;
	}

	parseInternal(message.data());
	}

	QString EncapsulatedRfc822MessagePart::text() const
	{
	return renderInternalText();
	}

	QString EncapsulatedRfc822MessagePart::from() const
	{
	if (auto from = mMessage->from(false)) {
	return from->asUnicodeString();
	}
	return {};
	}

	QDateTime EncapsulatedRfc822MessagePart::date() const
	{
	if (auto date = mMessage->date(false)) {
	return date->dateTime();
	}
	return {};
	}

	HeadersPart::HeadersPart(ObjectTreeParser otp, KMime::Content node)
	: MessagePart(otp, QString(), node)
	{
	}

	#include "moc_messagepart.cpp"
	diff --git a/src/core/partmetadata.h b/src/core/partmetadata.h
	index c07b867..1821578 100644
	--- a/src/core/partmetadata.h
	+++ b/src/core/partmetadata.h
	@@ -1,58 +1,56 @@
	// SPDX-FileCopyrightText: 2002-2003 Karl-Heinz Zimmer <khz@kde.org>
	// SPDX-FileCopyrightText: 2003 Marc Mutz <mutz@kde.org>
	// SPDX-License-Identifier: GPL-2.0-or-later

	#pragma once

	#include <QDateTime>
	#include <QStringList>
	#include <gpgme++/context.h>
	#include <gpgme++/verificationresult.h>

	namespace MimeTreeParser
	{

	class PartMetaData
	{
	public:
	PartMetaData()
	: isEncrypted(false)
	, isDecryptable(false)
	, inProgress(false)
	, technicalProblem(false)
	, isEncapsulatedRfc822Message(false)
	, isCompliant(false)
	, keyRevoked(false)
	{
	}

	inline bool isSigned() const
	{
	return verificationResult.signatures().size() > 0;
	}

	GpgME::VerificationResult verificationResult;

	QString signClass;
	QString signer;
	QStringList signerMailAddresses;
	QByteArray keyId;
	- QString keyTrust;
	QString status; // to be used for unknown plug-ins
	int status_code = 0; // = GPGME_SIG_STAT_NONE; to be used for i18n of OpenPGP and S/MIME CryptPlugs
	QString errorText;
	- QDateTime creationTime;
	QString decryptionError;
	QString auditLog;
	QString compliance; // textual representation of compliance status; empty if compliance isn't enforced
	GpgME::Error auditLogError;
	bool isEncrypted : 1;
	bool isDecryptable : 1;
	bool inProgress : 1;
	bool technicalProblem : 1;
	bool isEncapsulatedRfc822Message : 1;
	bool isCompliant : 1; // corresponds to the isDeVS flag of signature or decryption result
	bool keyRevoked : 1;
	};

	}
	diff --git a/src/core/partmodel.cpp b/src/core/partmodel.cpp
	index 7484330..76700d4 100644
	--- a/src/core/partmodel.cpp
	+++ b/src/core/partmodel.cpp
	@@ -1,892 +1,667 @@
	// SPDX-FileCopyrightText: 2016 Sandro Knauß <knauss@kolabsys.com>
	// SPDX-License-Identifier: LGPL-2.0-or-later

	#include "partmodel.h"

	#include "enums.h"
	#include "htmlutils.h"
	#include "mimetreeparser_core_debug.h"
	#include "objecttreeparser.h"
	#include "utils.h"

	#include <KLocalizedString>
	#include <Libkleo/Compliance>
	#include <Libkleo/Formatting>
	#include <Libkleo/KeyCache>

	#include <QDebug>
	#include <QGpgME/Protocol>
	#include <QRegularExpression>
	#include <QStringLiteral>
	#include <QTextDocument>
	#include <verificationresult.h>

	-std::optional<GpgME::Signature> signatureFromMessagePart(MimeTreeParser::MessagePart *messagePart)
	+static std::optional<GpgME::Signature> signatureFromMessagePart(MimeTreeParser::MessagePart *messagePart)
	{
	const auto signatureState = messagePart->signatureState();
	const bool messageIsSigned = signatureState == MimeTreeParser::KMMsgPartiallySigned \|\| signatureState == MimeTreeParser::KMMsgFullySigned;

	if (!messageIsSigned) {
	return std::nullopt;
	}

	const auto signatureParts = messagePart->signatures();
	Q_ASSERT(!signatureParts.isEmpty());
	if (signatureParts.empty()) {
	return std::nullopt;
	}
	const auto signaturePart = signatureParts.front(); // TODO add support for multiple signature

	const auto signatures = signaturePart->partMetaData()->verificationResult.signatures();
	Q_ASSERT(!signatures.empty());
	if (signatures.empty()) {
	return std::nullopt;
	}
	const auto signature = signatures.front(); // TODO add support for multiple signature
	return signature;
	}

	-static QString formatValidSignatureWithTrustLevel(const GpgME::UserID &id)
	-{
	- if (id.isNull()) {
	- return QString();
	- }
	- switch (id.validity()) {
	- case GpgME::UserID::Marginal:
	- return i18n("The signature is valid but the trust in the certificate's validity is only marginal.");
	- case GpgME::UserID::Full:
	- return i18n("The signature is valid and the certificate's validity is fully trusted.");
	- case GpgME::UserID::Ultimate:
	- return i18n("The signature is valid and the certificate's validity is ultimately trusted.");
	- case GpgME::UserID::Never:
	- return i18n("The signature is valid but the certificate's validity is <em>not trusted</em>.");
	- case GpgME::UserID::Unknown:
	- return i18n("The signature is valid but the certificate's validity is unknown.");
	- case GpgME::UserID::Undefined:
	- default:
	- return i18n("The signature is valid but the certificate's validity is undefined.");
	- }
	-}
	-
	-static QString renderKeyLink(const QString &fpr, const QString &text)
	-{
	- return QStringLiteral("<a href=\"key:%1\">%2</a>").arg(fpr, text);
	-}
	-
	-static QString renderKey(const GpgME::Key &key)
	-{
	- if (key.isNull()) {
	- return i18n("Unknown certificate");
	- }
	-
	- if (key.primaryFingerprint() && strlen(key.primaryFingerprint()) > 16 && key.numUserIDs()) {
	- const QString text = QStringLiteral("%1 (%2)")
	- .arg(Kleo::Formatting::prettyNameAndEMail(key).toHtmlEscaped())
	- .arg(Kleo::Formatting::prettyID(QString::fromLocal8Bit(key.primaryFingerprint()).right(16).toLatin1().constData()));
	- return renderKeyLink(QLatin1StringView(key.primaryFingerprint()), text);
	- }
	-
	- return renderKeyLink(QLatin1StringView(key.primaryFingerprint()), Kleo::Formatting::prettyID(key.primaryFingerprint()));
	-}
	-
	-static QString formatDate(const QDateTime &dt)
	-{
	- return QLocale().toString(dt);
	-}
	-
	-static QString formatSigningInformation(const GpgME::Signature &sig, const GpgME::Key &key)
	-{
	- if (sig.isNull()) {
	- return QString();
	- }
	- const QDateTime dt = sig.creationTime() != 0 ? QDateTime::fromSecsSinceEpoch(quint32(sig.creationTime())) : QDateTime();
	- QString text;
	-
	- if (key.isNull()) {
	- return text += i18n("With unavailable certificate:") + QStringLiteral("<br>ID: 0x%1").arg(QString::fromLatin1(sig.fingerprint()).toUpper());
	- }
	-
	- text += i18n("With certificate: %1", renderKey(key));
	-
	- if (Kleo::DeVSCompliance::isCompliant()) {
	- text += (QStringLiteral("<br/>")
	- + (sig.isDeVs() ? i18nc("%1 is a placeholder for the name of a compliance mode. E.g. NATO RESTRICTED compliant or VS-NfD compliant",
	- "The signature is %1",
	- Kleo::DeVSCompliance::name(true))
	- : i18nc("%1 is a placeholder for the name of a compliance mode. E.g. NATO RESTRICTED compliant or VS-NfD compliant",
	- "The signature <b>is not</b> %1.",
	- Kleo::DeVSCompliance::name(true))));
	- }
	-
	- return text;
	-}
	-
	-static QString signatureSummaryToString(GpgME::Signature::Summary summary)
	-{
	- if (summary & GpgME::Signature::None) {
	- return i18n("Error: Signature not verified");
	- } else if (summary & GpgME::Signature::Valid \|\| summary & GpgME::Signature::Green) {
	- return i18n("Good signature");
	- } else if (summary & GpgME::Signature::KeyRevoked) {
	- return i18n("Signing certificate was revoked");
	- } else if (summary & GpgME::Signature::KeyExpired) {
	- return i18n("Signing certificate is expired");
	- } else if (summary & GpgME::Signature::KeyMissing) {
	- return i18n("Certificate is not available");
	- } else if (summary & GpgME::Signature::SigExpired) {
	- return i18n("Signature expired");
	- } else if (summary & GpgME::Signature::CrlMissing) {
	- return i18n("CRL missing");
	- } else if (summary & GpgME::Signature::CrlTooOld) {
	- return i18n("CRL too old");
	- } else if (summary & GpgME::Signature::BadPolicy) {
	- return i18n("Bad policy");
	- } else if (summary & GpgME::Signature::SysError) {
	- return i18n("System error"); // ### retrieve system error details?
	- } else if (summary & GpgME::Signature::Red) {
	- return i18n("Bad signature");
	- }
	- return QString();
	-}
	-
	-static bool addrspec_equal(const KMime::Types::AddrSpec &lhs, const KMime::Types::AddrSpec &rhs, Qt::CaseSensitivity cs)
	-{
	- return lhs.localPart.compare(rhs.localPart, cs) == 0 && lhs.domain.compare(rhs.domain, Qt::CaseInsensitive) == 0;
	-}
	-
	-static std::string stripAngleBrackets(const std::string &str)
	-{
	- if (str.empty()) {
	- return str;
	- }
	- if (str[0] == '<' && str[str.size() - 1] == '>') {
	- return str.substr(1, str.size() - 2);
	- }
	- return str;
	-}
	-
	-static std::string email(const GpgME::UserID &uid)
	-{
	- if (uid.parent().protocol() == GpgME::OpenPGP) {
	- if (const char *const email = uid.email()) {
	- return stripAngleBrackets(email);
	- } else {
	- return std::string();
	- }
	- }
	-
	- Q_ASSERT(uid.parent().protocol() == GpgME::CMS);
	-
	- if (const char *const id = uid.id())
	- if (*id == '<') {
	- return stripAngleBrackets(id);
	- } else {
	- return Kleo::DN(id)[QStringLiteral("EMAIL")].trimmed().toUtf8().constData();
	- }
	- else {
	- return std::string();
	- }
	-}
	-
	-static bool mailbox_equal(const KMime::Types::Mailbox &lhs, const KMime::Types::Mailbox &rhs, Qt::CaseSensitivity cs)
	-{
	- return addrspec_equal(lhs.addrSpec(), rhs.addrSpec(), cs);
	-}
	-
	-static KMime::Types::Mailbox mailbox(const GpgME::UserID &uid)
	-{
	- const std::string e = email(uid);
	- KMime::Types::Mailbox mbox;
	- if (!e.empty()) {
	- mbox.setAddress(e.c_str());
	- }
	- return mbox;
	-}
	-
	-static GpgME::UserID findUserIDByMailbox(const GpgME::Key &key, const KMime::Types::Mailbox &mbox)
	-{
	- const auto userIDs{key.userIDs()};
	- for (const GpgME::UserID &id : userIDs) {
	- if (mailbox_equal(mailbox(id), mbox, Qt::CaseInsensitive)) {
	- return id;
	- }
	- }
	- return {};
	-}
	-
	-static QString formatSignature(const GpgME::Signature &sig, const GpgME::Key &key, const KMime::Types::Mailbox &sender)
	-{
	- if (sig.isNull()) {
	- return QString();
	- }
	-
	- const QString text = formatSigningInformation(sig, key) + QLatin1StringView("<br/>");
	-
	- // Green
	- if (sig.summary() & GpgME::Signature::Valid) {
	- const GpgME::UserID id = findUserIDByMailbox(key, sender);
	- return text + formatValidSignatureWithTrustLevel(!id.isNull() ? id : key.userID(0));
	- }
	-
	- // Red
	- if ((sig.summary() & GpgME::Signature::Red)) {
	- const QString ret = text + i18n("The signature is invalid: %1", signatureSummaryToString(sig.summary()));
	- if (sig.summary() & GpgME::Signature::SysError) {
	- return ret + QStringLiteral(" (%1)").arg(Kleo::Formatting::errorAsString(sig.status()));
	- }
	- return ret;
	- }
	-
	- // Key missing
	- if ((sig.summary() & GpgME::Signature::KeyMissing)) {
	- return text + i18n("You can search the certificate on a keyserver or import it from a file.");
	- }
	-
	- // Yellow
	- if ((sig.validity() & GpgME::Signature::Validity::Undefined) //
	- \|\| (sig.validity() & GpgME::Signature::Validity::Unknown) //
	- \|\| (sig.summary() == GpgME::Signature::Summary::None)) {
	- return text
	- + (key.protocol() == GpgME::OpenPGP
	- ? i18n("The used key is not certified by you or any trusted person.")
	- : i18n("The used certificate is not certified by a trustworthy Certificate Authority or the Certificate Authority is unknown."));
	- }
	-
	- // Catch all fall through
	- const QString ret = text + i18n("The signature is invalid: %1", signatureSummaryToString(sig.summary()));
	- if (sig.summary() & GpgME::Signature::SysError) {
	- return ret + QStringLiteral(" (%1)").arg(Kleo::Formatting::errorAsString(sig.status()));
	- }
	- return ret;
	-}
	-
	// We return a pair containing the trimmed string, as well as a boolean indicating whether the string was trimmed or not
	std::pair<QString, bool> PartModel::trim(const QString &text)
	{
	// The delimiters have <p>.? prefixed including the .? because sometimes we get a byte order mark <feff> (seen with user-agent:
	// Microsoft-MacOutlook/10.1d.0.190908) We match both regulard withspace with \s and non-breaking spaces with \u00A0
	const QList<QRegularExpression> delimiters{
	// English
	QRegularExpression{QStringLiteral("<p>.?-+Original(\\s\|\u00A0)Message-+"), QRegularExpression::CaseInsensitiveOption},
	// The remainder is not quoted
	QRegularExpression{QStringLiteral("<p>.?On.*wrote:"), QRegularExpression::CaseInsensitiveOption},
	// The remainder is quoted
	QRegularExpression{QStringLiteral("> On.*wrote:"), QRegularExpression::CaseInsensitiveOption},

	// German
	// Forwarded
	QRegularExpression{QStringLiteral("<p>.?Von:.*</p>"), QRegularExpression::CaseInsensitiveOption},
	// Reply
	QRegularExpression{QStringLiteral("<p>.?Am.schrieb.:</p>"), QRegularExpression::CaseInsensitiveOption},
	// Signature
	QRegularExpression{QStringLiteral("<p>.?--(\\s\|\u00A0)<br>"), QRegularExpression::CaseInsensitiveOption},
	};

	for (const auto &expression : delimiters) {
	auto i = expression.globalMatchView(text);
	while (i.hasNext()) {
	const auto match = i.next();
	const int startOffset = match.capturedStart(0);
	// This is a very simplistic detection for an inline reply where we would have the patterns before the actual message content.
	// We simply ignore anything we find within the first few lines.
	if (startOffset >= 5) {
	return {text.mid(0, startOffset), true};
	} else {
	// Search for the next delimiter
	continue;
	}
	}
	}

	return {text, false};
	}

	static QString addCss(const QString &s)
	{
	// Get the default font from QApplication
	static const QString fontFamily = QFont{}.family();
	// overflow:hidden ensures no scrollbars are ever shown.
	static const QString css = QStringLiteral("<style>\n")
	+ QStringLiteral(
	"body {\n"
	" overflow:hidden;\n"
	" font-family: \"%1\" ! important;\n"
	" color: #31363b ! important;\n"
	" background-color: #fcfcfc ! important\n"
	"}\n")
	.arg(fontFamily)
	+ QStringLiteral("blockquote { \n"
	" border-left: 2px solid #bdc3c7 ! important;\n"
	"}\n")
	+ QStringLiteral("</style>");

	const QString header = QLatin1StringView(
	"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" \"http://www.w3.org/TR/html4/loose.dtd\">\n"
	"<html><head><title></title>")
	+ css + QLatin1StringView("</head>\n<body>\n");
	return header + s + QStringLiteral("</body></html>");
	}

	class PartModelPrivate
	{
	public:
	PartModelPrivate(PartModel *q_ptr, const std::shared_ptr<MimeTreeParser::ObjectTreeParser> &parser)
	: q(q_ptr)
	, mParser(parser)
	{
	collectContents();
	}

	~PartModelPrivate() = default;

	void checkPart(const MimeTreeParser::MessagePart::Ptr part)
	{
	mMimeTypeCache[part.data()] = part->mimeType();
	// Extract the content of the part and
	mContents.insert(part.data(), extractContent(part.data()));
	}

	// Recursively find encapsulated messages
	void findEncapsulated(const MimeTreeParser::EncapsulatedRfc822MessagePart::Ptr &e)
	{
	mEncapsulatedParts[e.data()] = mParser->collectContentParts(e);
	for (const auto &subPart : std::as_const(mEncapsulatedParts[e.data()])) {
	checkPart(subPart);
	mParents[subPart.data()] = e.data();
	if (auto encapsulatedSub = subPart.dynamicCast<MimeTreeParser::EncapsulatedRfc822MessagePart>()) {
	findEncapsulated(encapsulatedSub);
	}
	}
	}

	QVariant extractContent(MimeTreeParser::MessagePart *messagePart)
	{
	if (auto alternativePart = dynamic_cast<MimeTreeParser::AlternativeMessagePart *>(messagePart)) {
	if (alternativePart->availableModes().contains(MimeTreeParser::AlternativeMessagePart::MultipartIcal)) {
	return alternativePart->icalContent();
	}
	}

	auto preprocessPlaintext = [&](const QString &text) {
	// Reduce consecutive new lines to never exceed 2
	auto cleaned = text;
	cleaned.replace(QRegularExpression(QStringLiteral("[\n\r]{2,}")), QStringLiteral("\n\n"));

	// We always do rich text (so we get highlighted links and stuff).
	const auto html = Qt::convertFromPlainText(cleaned, Qt::WhiteSpaceNormal);
	if (trimMail) {
	const auto result = PartModel::trim(html);
	isTrimmed = result.second;
	Q_EMIT q->trimMailChanged();
	return MimeTreeParser::linkify(result.first);
	}
	return MimeTreeParser::linkify(html);
	};

	if (messagePart->isHtml()) {
	if (dynamic_cast<MimeTreeParser::AlternativeMessagePart *>(messagePart)) {
	containsHtmlAndPlain = true;
	Q_EMIT q->containsHtmlChanged();
	if (!showHtml) {
	return preprocessPlaintext(messagePart->plaintextContent());
	}
	}
	return addCss(mParser->resolveCidLinks(messagePart->htmlContent()));
	}

	if (auto attachmentPart = dynamic_cast<MimeTreeParser::AttachmentMessagePart *>(messagePart)) {
	auto node = attachmentPart->node();
	if (node && mMimeTypeCache[attachmentPart] == QByteArrayLiteral("text/calendar")) {
	return messagePart->text();
	}
	}

	return preprocessPlaintext(messagePart->text());
	}

	QVariant contentForPart(MimeTreeParser::MessagePart *messagePart) const
	{
	return mContents.value(messagePart);
	}

	void collectContents()
	{
	mEncapsulatedParts.clear();
	mParents.clear();
	mContents.clear();
	containsHtmlAndPlain = false;
	isTrimmed = false;

	const auto parts = mParser->collectContentParts();
	MimeTreeParser::MessagePart::List filteredParts;

	for (const auto &part : parts) {
	if (part->node()) {
	const auto contentType = part->node()->contentType();
	if (contentType && contentType->hasParameter("protected-headers")) {
	const auto contentDisposition = part->node()->contentDisposition();
	if (contentDisposition && contentDisposition->disposition() == KMime::Headers::CDinline) {
	continue;
	}
	}
	}

	filteredParts << part;
	}

	for (const auto &part : std::as_const(filteredParts)) {
	checkPart(part);
	if (auto encapsulatedPart = part.dynamicCast<MimeTreeParser::EncapsulatedRfc822MessagePart>()) {
	findEncapsulated(encapsulatedPart);
	}
	}

	for (const auto &part : std::as_const(filteredParts)) {
	if (mMimeTypeCache[part.data()] == QByteArrayLiteral("text/calendar")) {
	mParts.prepend(part);
	} else {
	mParts.append(part);
	}
	}
	}

	PartModel *q;
	MimeTreeParser::MessagePart::List mParts;
	QHash<MimeTreeParser::MessagePart *, QByteArray> mMimeTypeCache;
	QHash<MimeTreeParser::MessagePart *, MimeTreeParser::MessagePart::List> mEncapsulatedParts;
	QHash<MimeTreeParser::MessagePart , MimeTreeParser::MessagePart > mParents;
	QMap<MimeTreeParser::MessagePart *, QVariant> mContents;
	std::shared_ptr<MimeTreeParser::ObjectTreeParser> mParser;
	bool showHtml{false};
	bool containsHtmlAndPlain{false};
	bool trimMail{false};
	bool isTrimmed{false};
	};

	PartModel::PartModel(std::shared_ptr<MimeTreeParser::ObjectTreeParser> parser)
	: d(std::unique_ptr<PartModelPrivate>(new PartModelPrivate(this, parser)))
	{
	}

	PartModel::~PartModel() = default;

	void PartModel::setShowHtml(bool html)
	{
	if (d->showHtml != html) {
	beginResetModel();
	d->showHtml = html;
	d->collectContents();
	endResetModel();
	Q_EMIT showHtmlChanged();
	}
	}

	bool PartModel::showHtml() const
	{
	return d->showHtml;
	}

	void PartModel::setTrimMail(bool trim)
	{
	if (d->trimMail != trim) {
	beginResetModel();
	d->trimMail = trim;
	d->collectContents();
	endResetModel();
	Q_EMIT trimMailChanged();
	}
	}

	bool PartModel::trimMail() const
	{
	return d->trimMail;
	}

	bool PartModel::isTrimmed() const
	{
	return d->isTrimmed;
	}

	bool PartModel::containsHtml() const
	{
	return d->containsHtmlAndPlain;
	}

	QHash<int, QByteArray> PartModel::roleNames() const
	{
	return {
	{TypeRole, QByteArrayLiteral("type")},
	{ContentRole, QByteArrayLiteral("content")},
	{IsEmbeddedRole, QByteArrayLiteral("isEmbedded")},
	{SidebarSecurityLevelRole, QByteArrayLiteral("sidebarSecurityLevel")},
	{EncryptionSecurityLevelRole, QByteArrayLiteral("encryptionSecurityLevel")},
	{SignatureSecurityLevelRole, QByteArrayLiteral("signatureSecurityLevel")},
	{EncryptionSecurityLevelRole, QByteArrayLiteral("encryptionSecurityLevel")},
	{ErrorType, QByteArrayLiteral("errorType")},
	{ErrorString, QByteArrayLiteral("errorString")},
	{IsErrorRole, QByteArrayLiteral("error")},
	{SenderRole, QByteArrayLiteral("sender")},
	{SignatureDetailsRole, QByteArrayLiteral("signatureDetails")},
	{SignatureIconNameRole, QByteArrayLiteral("signatureIconName")},
	{EncryptionDetails, QByteArrayLiteral("encryptionDetails")},
	{EncryptionIconNameRole, QByteArrayLiteral("encryptionIconName")},
	{DateRole, QByteArrayLiteral("date")},
	};
	}

	QModelIndex PartModel::index(int row, int column, const QModelIndex &parent) const
	{
	if (row < 0 \|\| column != 0) {
	return QModelIndex();
	}
	if (parent.isValid()) {
	const auto part = static_cast<MimeTreeParser::MessagePart *>(parent.internalPointer());
	auto encapsulatedPart = dynamic_cast<MimeTreeParser::EncapsulatedRfc822MessagePart *>(part);

	if (encapsulatedPart) {
	const auto parts = d->mEncapsulatedParts[encapsulatedPart];
	if (row < parts.size()) {
	return createIndex(row, column, parts.at(row).data());
	}
	}
	return QModelIndex();
	}
	if (row < d->mParts.size()) {
	return createIndex(row, column, d->mParts.at(row).data());
	}
	return QModelIndex();
	}

	SignatureInfo encryptionInfo(MimeTreeParser::MessagePart *messagePart)
	{
	SignatureInfo signatureInfo;
	const auto encryptions = messagePart->encryptions();
	if (encryptions.size() > 1) {
	qWarning() << "Can't deal with more than one encryption";
	}
	for (const auto &encryptionPart : encryptions) {
	signatureInfo.keyId = encryptionPart->partMetaData()->keyId;
	signatureInfo.cryptoProto = encryptionPart->cryptoProto();
	signatureInfo.decryptRecipients = encryptionPart->decryptRecipients();
	}
	return signatureInfo;
	};
	template<typename T>
	const T findHeader(KMime::Content content)
	{
	auto header = content->header<T>();
	if (header \|\| !content->parent()) {
	return header;
	}
	return findHeader<T>(content->parent());
	}

	QVariant PartModel::data(const QModelIndex &index, int role) const
	{
	if (!index.isValid()) {
	return QVariant();
	}

	if (index.internalPointer()) {
	const auto messagePart = static_cast<MimeTreeParser::MessagePart *>(index.internalPointer());
	// qWarning() << "Found message part " << messagePart->metaObject()->className() << messagePart->partMetaData()->status << messagePart->error();
	Q_ASSERT(messagePart);
	switch (role) {
	case Qt::DisplayRole:
	return QStringLiteral("Content%1");
	case SenderRole: {
	if (auto e = dynamic_cast<MimeTreeParser::EncapsulatedRfc822MessagePart *>(messagePart)) {
	return e->from();
	}
	return {};
	}
	case DateRole: {
	if (auto e = dynamic_cast<MimeTreeParser::EncapsulatedRfc822MessagePart *>(messagePart)) {
	return e->date();
	}
	return {};
	}
	case TypeRole: {
	if (messagePart->error()) {
	return QVariant::fromValue(Types::Error);
	}
	if (dynamic_cast<MimeTreeParser::EncapsulatedRfc822MessagePart *>(messagePart)) {
	return QVariant::fromValue(Types::Encapsulated);
	}
	if (auto alternativePart = dynamic_cast<MimeTreeParser::AlternativeMessagePart *>(messagePart)) {
	if (alternativePart->availableModes().contains(MimeTreeParser::AlternativeMessagePart::MultipartIcal)) {
	return QVariant::fromValue(Types::Ical);
	}
	}
	if (auto attachmentPart = dynamic_cast<MimeTreeParser::AttachmentMessagePart *>(messagePart)) {
	auto node = attachmentPart->node();
	if (!node) {
	qWarning() << "no content for attachment";
	return {};
	}
	if (d->mMimeTypeCache[attachmentPart] == QByteArrayLiteral("text/calendar")) {
	return QVariant::fromValue(Types::Ical);
	}
	}
	if (!d->showHtml && d->containsHtmlAndPlain) {
	return QVariant::fromValue(Types::Plain);
	}
	// For simple html we don't need a browser
	auto complexHtml = [&] {
	if (messagePart->isHtml()) {
	const auto text = messagePart->htmlContent();
	if (text.contains(QStringLiteral("<!DOCTYPE html PUBLIC"))) {
	// We can probably deal with this if it adheres to the strict dtd
	//(that's what our composer produces as well)
	if (!text.contains(QStringLiteral("http://www.w3.org/TR/REC-html40/strict.dtd"))) {
	return true;
	}
	}
	// Blockquotes don't support any styling which would be necessary so they become readable.
	if (text.contains(QStringLiteral("blockquote"))) {
	return true;
	}
	// Media queries are too advanced
	if (text.contains(QStringLiteral("@media"))) {
	return true;
	}
	// auto css properties are not supported e.g margin-left: auto;
	if (text.contains(QStringLiteral(": auto;"))) {
	return true;
	}
	return false;
	} else {
	return false;
	}
	}();
	if (complexHtml) {
	return QVariant::fromValue(Types::Html);
	}
	return QVariant::fromValue(Types::Plain);
	}
	case IsEmbeddedRole:
	return false;
	case IsErrorRole:
	return messagePart->error();
	case ContentRole:
	return d->contentForPart(messagePart);
	case SidebarSecurityLevelRole: {
	const auto signature = index.data(SignatureSecurityLevelRole).value<SecurityLevel>();
	const auto encryption = index.data(EncryptionSecurityLevelRole).value<SecurityLevel>();

	if (signature == SecurityLevel::Bad \|\| encryption == SecurityLevel::Bad) {
	return SecurityLevel::Bad;
	}

	if (signature == SecurityLevel::NotSoGood \|\| encryption == SecurityLevel::NotSoGood) {
	return SecurityLevel::NotSoGood;
	}

	if (signature == SecurityLevel::Good \|\| encryption == SecurityLevel::Good) {
	return SecurityLevel::Good;
	}

	return SecurityLevel::Unknow;
	}
	case SignatureSecurityLevelRole: {
	// Color displayed for the signature info box
	auto signature = signatureFromMessagePart(messagePart);
	if (!signature) {
	return SecurityLevel::Unknow;
	}

	const auto summary = signature->summary();

	if (summary & GpgME::Signature::Summary::Red) {
	return SecurityLevel::Bad;
	}
	if (summary & GpgME::Signature::Summary::Valid) {
	return SecurityLevel::Good;
	}

	return SecurityLevel::NotSoGood;
	}
	case EncryptionSecurityLevelRole: {
	// Color displayed for the encryption info box
	const auto encryption = messagePart->encryptionState();
	const bool messageIsEncrypted = encryption == MimeTreeParser::KMMsgPartiallyEncrypted \|\| encryption == MimeTreeParser::KMMsgFullyEncrypted;

	if (messagePart->error()) {
	return SecurityLevel::Bad;
	}

	return messageIsEncrypted ? SecurityLevel::Good : SecurityLevel::Unknow;
	}
	case EncryptionIconNameRole: {
	const auto encryption = messagePart->encryptionState();
	const bool messageIsEncrypted = encryption == MimeTreeParser::KMMsgPartiallyEncrypted \|\| encryption == MimeTreeParser::KMMsgFullyEncrypted;

	if (messagePart->error()) {
	return QStringLiteral("data-error");
	}

	return messageIsEncrypted ? QStringLiteral("mail-encrypted") : QString();
	}
	case SignatureIconNameRole: {
	auto signature = signatureFromMessagePart(messagePart);
	if (!signature) {
	return QString{};
	}

	const auto summary = signature->summary();
	if (summary & GpgME::Signature::Valid) {
	return QStringLiteral("mail-signed");
	} else if (summary & GpgME::Signature::Red) {
	return QStringLiteral("data-error");
	} else {
	return QStringLiteral("data-warning");
	}
	}
	case SignatureDetailsRole: {
	auto signature = signatureFromMessagePart(messagePart);
	if (!signature) {
	return QString{};
	}

	GpgME::Key key = signature->key();
	if (key.isNull()) {
	key = Kleo::KeyCache::instance()->findByFingerprint(signature->fingerprint());
	}
	if (key.isNull() && signature->fingerprint()) {
	// try to find a subkey that was used for signing;
	// assumes that the key ID is the last 16 characters of the fingerprint
	const auto fpr = std::string_view{signature->fingerprint()};
	const auto keyID = std::string{fpr, fpr.size() - 16, 16};
	const auto subkeys = Kleo::KeyCache::instance()->findSubkeysByKeyID({keyID});
	if (subkeys.size() > 0) {
	key = subkeys[0].parent();
	}
	}
	if (key.isNull()) {
	qCWarning(MIMETREEPARSER_CORE_LOG) << "Found no key or subkey for fingerprint" << signature->fingerprint();
	}

	QStringList senderUserId;
	for (int i = 0, count = key.userIDs().size(); i < count; i++) {
	senderUserId << QString::fromUtf8(key.userID(i).email());
	}

	// guess sender from mime node or parent node
	auto from = findHeader<KMime::Headers::From>(messagePart->node());
	if (from) {
	const auto mailboxes = from->mailboxes();
	if (!mailboxes.isEmpty()) {
	auto mailBox = mailboxes.front();
	if (mailBox.hasAddress()) {
	- return formatSignature(*signature, key, mailboxes.front());
	+ return Kleo::Formatting::prettySignature(*signature, mailboxes.front());
	}
	}
	}
	-
	- // use first non empty userId as fallback
	- KMime::Types::Mailbox mailBox;
	- for (int i = 0, count = key.userIDs().size(); i < count; i++) {
	- const auto address = QString::fromUtf8(key.userID(1).email());
	- if (!address.isEmpty()) {
	- mailBox.fromUnicodeString(address);
	- break;
	- }
	- }
	-
	- return formatSignature(*signature, key, mailBox);
	+ return Kleo::Formatting::prettySignature(*signature, {});
	}
	case EncryptionDetails:
	return QVariant::fromValue(encryptionInfo(messagePart));
	case ErrorType:
	return messagePart->error();
	case ErrorString: {
	switch (messagePart->error()) {
	case MimeTreeParser::MessagePart::NoKeyError: {
	if (auto encryptedMessagePart = dynamic_cast<MimeTreeParser::EncryptedMessagePart *>(messagePart)) {
	if (encryptedMessagePart->isNoSecKey()) {
	QString errorMessage;
	if (encryptedMessagePart->cryptoProto() == QGpgME::smime()) {
	errorMessage +=
	i18ndc("mimetreeparser", "@info:status", "You cannot decrypt this message.");
	} else {
	errorMessage +=
	i18ndc("mimetreeparser", "@info:status", "You cannot decrypt this message.");
	}
	if (!encryptedMessagePart->decryptRecipients().empty()) {
	errorMessage += QLatin1Char(' ')
	+ i18ndcp("mimetreeparser",
	"@info:status",
	"The message is encrypted for the following recipient:",
	"The message is encrypted for the following recipients:",
	encryptedMessagePart->decryptRecipients().size());
	errorMessage +=
	MimeTreeParser::decryptRecipientsToHtml(encryptedMessagePart->decryptRecipients(), encryptedMessagePart->cryptoProto());
	}
	return errorMessage;
	}
	}
	}

	return messagePart->errorString();

	case MimeTreeParser::MessagePart::PassphraseError:
	return i18ndc("mimetreeparser", "@info:status", "Wrong passphrase.");
	case MimeTreeParser::MessagePart::UnknownError:
	break;
	default:
	break;
	}
	return messagePart->errorString();
	}
	}
	}
	return QVariant();
	}

	QModelIndex PartModel::parent(const QModelIndex &index) const
	{
	if (index.isValid()) {
	if (auto indexPart = static_cast<MimeTreeParser::MessagePart *>(index.internalPointer())) {
	for (const auto &part : std::as_const(d->mParts)) {
	if (part.data() == indexPart) {
	return QModelIndex();
	}
	}
	const auto parentPart = d->mParents[indexPart];
	Q_ASSERT(parentPart);
	int row = 0;
	const auto parts = d->mEncapsulatedParts[parentPart];
	for (const auto &part : parts) {
	if (part.data() == indexPart) {
	break;
	}
	row++;
	}
	return createIndex(row, 0, parentPart);
	}
	return {};
	}
	return {};
	}

	int PartModel::rowCount(const QModelIndex &parent) const
	{
	if (parent.isValid()) {
	const auto part = static_cast<MimeTreeParser::MessagePart *>(parent.internalPointer());
	auto encapsulatedPart = dynamic_cast<MimeTreeParser::EncapsulatedRfc822MessagePart *>(part);

	if (encapsulatedPart) {
	const auto parts = d->mEncapsulatedParts[encapsulatedPart];
	return parts.size();
	}
	return 0;
	}
	return d->mParts.count();
	}

	int PartModel::columnCount(const QModelIndex &) const
	{
	return 1;
	}

	#include "moc_partmodel.cpp"

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