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diff --git a/src/core/partmodel.cpp b/src/core/partmodel.cpp
index 1458015..450aec9 100644
--- a/src/core/partmodel.cpp
+++ b/src/core/partmodel.cpp
@@ -1,582 +1,594 @@
// SPDX-FileCopyrightText: 2016 Sandro Knauß <knauss@kolabsys.com>
// SPDX-License-Identifier: LGPL-2.0-or-later
#include "partmodel.h"
#include "htmlutils.h"
#include "objecttreeparser.h"
#include "utils.h"
#include <KLocalizedString>
#include <QDebug>
#include <QGpgME/Protocol>
#include <QRegularExpression>
#include <QStringLiteral>
#include <QTextDocument>
// 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("&gt; 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.globalMatch(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 = QLatin1String(
"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" \"http://www.w3.org/TR/html4/loose.dtd\">\n"
"<html><head><title></title>")
+ css + QLatin1String("</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] == "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(QStringLiteral("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()] == "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()
{
}
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
{
QHash<int, QByteArray> roles;
roles[TypeRole] = "type";
roles[ContentRole] = "content";
roles[IsEmbeddedRole] = "embedded";
roles[IsEncryptedRole] = "encrypted";
roles[IsSignedRole] = "signed";
roles[SecurityLevelRole] = "securityLevel";
roles[EncryptionSecurityLevelRole] = "encryptionSecurityLevel";
roles[SignatureSecurityLevelRole] = "signatureSecurityLevel";
roles[ErrorType] = "errorType";
roles[ErrorString] = "errorString";
roles[IsErrorRole] = "error";
roles[SenderRole] = "sender";
roles[SignatureDetails] = "signatureDetails";
roles[EncryptionDetails] = "encryptionDetails";
roles[DateRole] = "date";
return roles;
}
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;
};
SignatureInfo signatureInfo(MimeTreeParser::MessagePart *messagePart)
{
SignatureInfo signatureInfo;
const auto signatures = messagePart->signatures();
if (signatures.size() > 1) {
qWarning() << "Can't deal with more than one signature";
}
for (const auto &signaturePart : signatures) {
signatureInfo.keyId = signaturePart->partMetaData()->keyId;
signatureInfo.cryptoProto = signaturePart->cryptoProto();
signatureInfo.keyMissing = signaturePart->partMetaData()->sigSummary & GpgME::Signature::KeyMissing;
signatureInfo.keyExpired = signaturePart->partMetaData()->sigSummary & GpgME::Signature::KeyExpired;
signatureInfo.keyRevoked = signaturePart->partMetaData()->sigSummary & GpgME::Signature::KeyRevoked;
signatureInfo.sigExpired = signaturePart->partMetaData()->sigSummary & GpgME::Signature::SigExpired;
signatureInfo.crlMissing = signaturePart->partMetaData()->sigSummary & GpgME::Signature::CrlMissing;
signatureInfo.crlTooOld = signaturePart->partMetaData()->sigSummary & GpgME::Signature::CrlTooOld;
signatureInfo.signer = signaturePart->partMetaData()->signer;
signatureInfo.isCompliant = signaturePart->partMetaData()->isCompliant;
signatureInfo.signerMailAddresses = signaturePart->partMetaData()->signerMailAddresses;
signatureInfo.signatureIsGood = signaturePart->partMetaData()->isGoodSignature;
signatureInfo.keyTrust = signaturePart->partMetaData()->keyTrust;
}
return signatureInfo;
}
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] == "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 IsEncryptedRole:
return messagePart->encryptionState() != MimeTreeParser::KMMsgNotEncrypted;
case IsSignedRole:
return messagePart->signatureState() != MimeTreeParser::KMMsgNotSigned;
case SecurityLevelRole: {
auto signature = messagePart->signatureState();
auto encryption = messagePart->encryptionState();
bool messageIsSigned = signature == MimeTreeParser::KMMsgPartiallySigned || signature == MimeTreeParser::KMMsgFullySigned;
bool messageIsEncrypted = encryption == MimeTreeParser::KMMsgPartiallyEncrypted || encryption == MimeTreeParser::KMMsgFullyEncrypted;
if (messageIsSigned) {
const auto sigInfo = signatureInfo(messagePart);
if (!sigInfo.signatureIsGood) {
if (sigInfo.keyMissing || sigInfo.keyExpired) {
return SecurityLevel::NotSoGood;
}
return SecurityLevel::Bad;
}
}
// All good
if ((messageIsSigned || messageIsEncrypted) && !messagePart->error()) {
return SecurityLevel::Good;
}
// No info
return SecurityLevel::Unknow;
}
case EncryptionSecurityLevelRole: {
auto encryption = messagePart->encryptionState();
bool messageIsEncrypted = encryption == MimeTreeParser::KMMsgPartiallyEncrypted || encryption == MimeTreeParser::KMMsgFullyEncrypted;
if (messagePart->error()) {
return SecurityLevel::Bad;
}
// All good
if (messageIsEncrypted) {
return SecurityLevel::Good;
}
// No info
return SecurityLevel::Unknow;
}
case SignatureSecurityLevelRole: {
auto signature = messagePart->signatureState();
bool messageIsSigned = signature == MimeTreeParser::KMMsgPartiallySigned || signature == MimeTreeParser::KMMsgFullySigned;
if (messageIsSigned) {
const auto sigInfo = signatureInfo(messagePart);
if (!sigInfo.signatureIsGood) {
if (sigInfo.keyMissing || sigInfo.keyExpired) {
return SecurityLevel::NotSoGood;
}
return SecurityLevel::Bad;
}
return SecurityLevel::Good;
}
// No info
return SecurityLevel::Unknow;
}
case SignatureDetails:
return QVariant::fromValue(signatureInfo(messagePart));
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 = i18ndc("mimetreeparser", "@info:status", "No secret key found to decrypt the message.");
+ QString errorMessage;
+ if (encryptedMessagePart->cryptoProto() == QGpgME::smime()) {
+ errorMessage +=
+ i18ndc("mimetreeparser", "@info:status", "This message cannot be decrypted with any S/MIME certificate in your keyring.");
+ } else {
+ errorMessage +=
+ i18ndc("mimetreeparser", "@info:status", "This message cannot be decrypted with any OpenPGP certificate in your keyring.");
+ }
if (!encryptedMessagePart->decryptRecipients().empty()) {
- errorMessage += QLatin1Char(' ') + i18ndc("mimetreeparser", "@info:status", "The message is encrypted for the following keys:");
+ errorMessage += QLatin1Char(' ')
+ + i18ndcp("mimetreeparser",
+ "@info:status",
+ "The message is encrypted for the following certificate:",
+ "The message is encrypted for the following certificates:",
+ 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;
}

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