FullMessageCombiner::FullMessageCombiner(const QModelIndex &messageIndex, QObject *parent) :
QObject(parent), m_model(0), m_messageIndex(messageIndex)
{
Imap::Mailbox::Model::realTreeItem(messageIndex, &m_model);
Q_ASSERT(m_model);
Imap::Mailbox::TreeItemPart *headerPart = headerPartPtr();
Imap::Mailbox::TreeItemPart *bodyPart = bodyPartPtr();
Q_ASSERT(headerPart);
Q_ASSERT(bodyPart);
m_headerPartIndex = headerPart->toIndex(const_cast<Mailbox::Model *>(m_model));
Q_ASSERT(m_headerPartIndex.isValid());
m_bodyPartIndex = bodyPart->toIndex(const_cast<Mailbox::Model *>(m_model));
Q_ASSERT(m_bodyPartIndex.isValid());
connect(m_model, SIGNAL(dataChanged(QModelIndex,QModelIndex)), SLOT(slotDataChanged(QModelIndex,QModelIndex)));
}
/** @short Prepare a network request
This function handles delegating access to the other body parts using various schemes (ie. the special trojita-imap:// one used
by Trojita for internal purposes and the cid: one for referencing to other body parts). Policy checks for filtering access to
the public Internet are also performed at this level.
*/
QNetworkReply *MsgPartNetAccessManager::createRequest(Operation op, const QNetworkRequest &req, QIODevice *outgoingData)
{
Q_UNUSED(op);
Q_UNUSED(outgoingData);
if (!message.isValid()) {
// Our message got removed in the meanwhile
// FIXME: add a better class here
return new Imap::Network::ForbiddenReply(this);
}
Q_ASSERT(message.isValid());
const Mailbox::Model *constModel = 0;
Mailbox::Model::realTreeItem(message, &constModel);
Q_ASSERT(constModel);
Mailbox::Model *model = const_cast<Mailbox::Model *>(constModel);
Q_ASSERT(model);
Imap::Mailbox::TreeItemPart *part = pathToPart(message, req.url().path());
QModelIndex partIndex = part ? part->toIndex(model) : QModelIndex();
if (req.url().scheme() == QLatin1String("trojita-imap") && req.url().host() == QLatin1String("msg")) {
// Internal Trojita reference
if (part) {
return new Imap::Network::MsgPartNetworkReply(this, partIndex);
} else {
qDebug() << "No such part:" << req.url();
return new Imap::Network::ForbiddenReply(this);
}
} else if (req.url().scheme() == QLatin1String("cid")) {
// The cid: scheme for cross-part references
QByteArray cid = req.url().path().toUtf8();
if (!cid.startsWith("<"))
cid = QByteArray("<") + cid;
if (!cid.endsWith(">"))
cid += ">";
Imap::Mailbox::TreeItemPart *target = cidToPart(cid, model, model->realTreeItem(message));
if (target) {
return new Imap::Network::MsgPartNetworkReply(this, target->toIndex(model));
} else {
qDebug() << "Content-ID not found" << cid;
return new Imap::Network::ForbiddenReply(this);
}
} else if (req.url() == QUrl(QLatin1String("about:blank"))) {
// about:blank is a relatively harmless URL which is used for opening an empty page
return QNetworkAccessManager::createRequest(op, req, outgoingData);
} else if (req.url().scheme() == QLatin1String("data")) {
// data: scheme shall be safe, it's just a method of local access after all
return QNetworkAccessManager::createRequest(op, req, outgoingData);
} else {
// Regular access -- we've got to check policy here
if (req.url().scheme() == QLatin1String("http") || req.url().scheme() == QLatin1String("https")) {
if (externalsEnabled) {
return QNetworkAccessManager::createRequest(op, req, outgoingData);
} else {
emit requestingExternal(req.url());
return new Imap::Network::ForbiddenReply(this);
}
} else {
qDebug() << "Forbidden per policy:" << req.url();
return new Imap::Network::ForbiddenReply(this);
}
}
}
QWidget *PartWidgetFactory::create(const QModelIndex &partIndex, int recursionDepth, const PartLoadingMode loadingMode)
{
using namespace Imap::Mailbox;
Q_ASSERT(partIndex.isValid());
if (recursionDepth > 1000) {
return new QLabel(tr("This message contains too deep nesting of MIME message parts.\n"
"To prevent stack exhaustion and your head from exploding, only\n"
"the top-most thousand items or so are shown."), 0);
}
bool userPrefersPlaintext = QSettings().value(Common::SettingsNames::guiPreferPlaintextRendering, QVariant(true)).toBool();
QString mimeType = partIndex.data(Imap::Mailbox::RolePartMimeType).toString();
if (mimeType.startsWith(QLatin1String("multipart/"))) {
// it's a compound part
if (mimeType == QLatin1String("multipart/alternative")) {
return new MultipartAlternativeWidget(0, this, partIndex, recursionDepth,
userPrefersPlaintext ?
QLatin1String("text/plain") :
QLatin1String("text/html"));
} else if (mimeType == QLatin1String("multipart/signed")) {
return new MultipartSignedWidget(0, this, partIndex, recursionDepth);
} else if (mimeType == QLatin1String("multipart/related")) {
// The purpose of this section is to find a text/html e-mail, along with its associated body parts, and hide
// everything else than the HTML widget.
// At this point, it might be interesting to somehow respect the user's preference about using text/plain
// instead of text/html. However, things are a bit complicated; the widget used at this point really wants
// to either show just a single part or alternatively all of them in a sequence.
// Furthermore, if someone sends a text/plain and a text/html together inside a multipart/related, they're
// just wrong.
// Let's see if we know what the root part is
QModelIndex mainPartIndex;
QVariant mainPartCID = partIndex.data(RolePartMultipartRelatedMainCid);
if (mainPartCID.isValid()) {
const Imap::Mailbox::Model *constModel = 0;
Imap::Mailbox::TreeItemPart *part = dynamic_cast<Imap::Mailbox::TreeItemPart *>(Imap::Mailbox::Model::realTreeItem(partIndex, &constModel));
Imap::Mailbox::Model *model = const_cast<Imap::Mailbox::Model *>(constModel);
Imap::Mailbox::TreeItemPart *mainPartPtr = Imap::Network::MsgPartNetAccessManager::cidToPart(mainPartCID.toByteArray(), model, part);
if (mainPartPtr) {
mainPartIndex = mainPartPtr->toIndex(model);
}
}
if (!mainPartIndex.isValid()) {
// The Content-Type-based start parameter was not terribly useful. Let's find the HTML part manually.
QModelIndex candidate = partIndex.child(0, 0);
while (candidate.isValid()) {
if (candidate.data(RolePartMimeType).toString() == QLatin1String("text/html")) {
mainPartIndex = candidate;
break;
}
candidate = candidate.sibling(candidate.row() + 1, 0);
}
}
if (mainPartIndex.isValid()) {
if (mainPartIndex.data(RolePartMimeType).toString() == QLatin1String("text/html")) {
return PartWidgetFactory::create(mainPartIndex, recursionDepth+1);
} else {
// Sorry, but anything else than text/html is by definition suspicious here. Better than picking some random
// choice, let's just show everything.
return new GenericMultipartWidget(0, this, partIndex, recursionDepth);
}
} else {
// The RFC2387's wording is clear that in absence of an explicit START argument, the first part is the starting one.
// On the other hand, I've seen real-world messages whose first part is some utter garbage (an image sent as
// application/octet-stream, for example) and some *other* part is an HTML text. In that case (and if we somehow
// failed to pick the HTML part by a heuristic), it's better to show everything.
return new GenericMultipartWidget(0, this, partIndex, recursionDepth);
}
} else {
return new GenericMultipartWidget(0, this, partIndex, recursionDepth);
}
} else if (mimeType == QLatin1String("message/rfc822")) {
return new Message822Widget(0, this, partIndex, recursionDepth);
} else {
QStringList allowedMimeTypes;
allowedMimeTypes << "text/html" << "text/plain" << "image/jpeg" <<
"image/jpg" << "image/pjpeg" << "image/png" << "image/gif";
// The problem is that some nasty MUAs (hint hint Thunderbird) would
// happily attach a .tar.gz and call it "inline"
bool showInline = partIndex.data(Imap::Mailbox::RolePartBodyDisposition).toByteArray().toLower() != "attachment" &&
allowedMimeTypes.contains(mimeType);
if (showInline) {
const Imap::Mailbox::Model *constModel = 0;
Imap::Mailbox::TreeItemPart *part = dynamic_cast<Imap::Mailbox::TreeItemPart *>(Imap::Mailbox::Model::realTreeItem(partIndex, &constModel));
Imap::Mailbox::Model *model = const_cast<Imap::Mailbox::Model *>(constModel);
Q_ASSERT(model);
Q_ASSERT(part);
part->fetchFromCache(model);
bool showDirectly = loadingMode == LOAD_IMMEDIATELY;
if (!part->fetched())
showDirectly &= model->isNetworkOnline() || part->octets() <= ExpensiveFetchThreshold;
QWidget *widget = 0;
if (showDirectly) {
widget = new SimplePartWidget(0, manager, partIndex, m_messageView);
} else if (model->isNetworkAvailable() || part->fetched()) {
widget = new LoadablePartWidget(0, manager, partIndex, m_messageView,
loadingMode == LOAD_ON_SHOW && part->octets() <= ExpensiveFetchThreshold ?
LoadablePartWidget::LOAD_ON_SHOW :
LoadablePartWidget::LOAD_ON_CLICK);
} else {
widget = new QLabel(tr("Offline"), 0);
}
return widget;
} else {
return new AttachmentView(0, manager, partIndex);
}
}
QLabel *lbl = new QLabel(mimeType, 0);
return lbl;
}