bool KisKraLoadVisitor::loadMetaData(KisNode* node)
{
dbgFile << "Load metadata for " << node->name();
KisLayer* layer = qobject_cast<KisLayer*>(node);
if (!layer) return true;
bool result = true;
KisMetaData::IOBackend* backend = KisMetaData::IOBackendRegistry::instance()->get("xmp");
if (!backend || !backend->supportLoading()) {
if (backend)
dbgFile << "Backend " << backend->id() << " does not support loading.";
else
dbgFile << "Could not load the XMP backenda t all";
return true;
}
QString location = getLocation(node, QString(".") + backend->id() + DOT_METADATA);
dbgFile << "going to load " << backend->id() << ", " << backend->name() << " from " << location;
if (m_store->hasFile(location)) {
QByteArray data;
m_store->open(location);
data = m_store->read(m_store->size());
m_store->close();
QBuffer buffer(&data);
if (!backend->loadFrom(layer->metaData(), &buffer)) {
m_errorMessages << i18n("Could not load metadata for layer %1.", layer->name());
result = false;
}
}
return result;
}
bool KisKraSaveVisitor::saveMetaData(KisNode* node)
{
if (!node->inherits("KisLayer")) return true;
KisMetaData::Store* metadata = (static_cast<KisLayer*>(node))->metaData();
if (metadata->isEmpty()) return true;
// Serialize all the types of metadata there are
KisMetaData::IOBackend* backend = KisMetaData::IOBackendRegistry::instance()->get("xmp");
if (!backend->supportSaving()) {
dbgFile << "Backend " << backend->id() << " does not support saving.";
return false;
}
QString location = getLocation(node, QString(".") + backend->id() + DOT_METADATA);
dbgFile << "going to save " << backend->id() << ", " << backend->name() << " to " << location;
QBuffer buffer;
// not that the metadata backends every return anything but true...
bool retval = backend->saveTo(metadata, &buffer);
if (!retval) {
m_errorMessages << i18n("The metadata backend failed to save the metadata for %1", node->name());
}
else {
QByteArray data = buffer.data();
dbgFile << "\t information size is" << data.size();
if (data.size() > 0 && m_store->open(location)) {
retval = m_store->write(data, data.size());
m_store->close();
}
if (!retval) {
m_errorMessages << i18n("Could not write for %1 metadata to the file.", node->name());
}
}
return retval;
}