GMsg VectorBuffer::EraseFeatureFromInteraction(
const feature_ptr &src, const string &proj,
const std::unordered_set<long> &targets,
const std::unordered_set<long> &immunes)
{
GRect ext = MapnikUtils::Box2d2GRect(src->envelope());
unordered_map<long, feature_ptr> fs = GetFeaturesInRect(
proj, ext, _config_app().VIEW_VECTORBUFFER_SELECTION_MAX);
unordered_map<long, feature_ptr> edited_in_clipping;
unordered_set<long> removed_in_clipping;
for (unordered_map<long, feature_ptr>::const_iterator it = fs.begin();
it != fs.end(); it++)
{
feature_ptr f = it->second;
if (immunes.find(f->id()) != immunes.end()) continue;
if (!targets.empty() && targets.find(f->id()) == targets.end()) continue;
if (MapnikUtils::contains(
src, f, wkbPolygon, _book->GetGeomType(), proj, _layer->proj()))
{
removed_in_clipping.insert(it->first);
}
else if (MapnikUtils::intersects(
src, f, wkbPolygon, _book->GetGeomType(), proj, _layer->proj()))
{
feature_ptr clipped = MapnikUtils::difference(
f, src, _book->GetGeomType(), wkbPolygon, _layer->proj(), proj);
if (clipped != nullptr) {
edited_in_clipping.insert(pair<long, feature_ptr>(it->first, clipped));
}
}
}
unsigned int num = removed_in_clipping.size() + edited_in_clipping.size();
if (num == 0) return G_NOERR;
_undoStack->beginMacro(num == 1 ? "Erase feature" : "Erase features");
for (unordered_set<long>::const_iterator it = removed_in_clipping.begin();
it != removed_in_clipping.end(); it++)
{
_undoStack->push(new VBCommandDeleteFeature(this, *it));
}
for (unordered_map<long, feature_ptr>::const_iterator it = edited_in_clipping.begin();
it != edited_in_clipping.end(); it++)
{
long fid = it->first;
feature_ptr f = it->second;
Q_ASSERT(_deletedFeatures.find(fid) == _deletedFeatures.end());
f->put<value_unicode_string>(
_config_app().VIEW_VECTORBUFFER_FIELD_EDITED,
transcoder("utf-8").transcode("edited"));
_undoStack->push(new VBCommandEditFeature(this, fid, f));
}
_undoStack->endMacro();
return G_NOERR;
}
GMsg VectorBuffer::SplitFeatureFromInteraction(
const feature_ptr &src, const string &proj)
{
GRect ext = MapnikUtils::Box2d2GRect(src->envelope());
unordered_map<long, feature_ptr> fs = GetFeaturesInRect(
proj, ext, _config_app().VIEW_VECTORBUFFER_SELECTION_MAX);
unordered_map<long, vector<feature_ptr> > edited_in_splitting;
GMsg retmsg;
for (unordered_map<long, feature_ptr>::const_iterator it = fs.begin();
it != fs.end(); it++)
{
feature_ptr f = it->second;
if (MapnikUtils::intersects(
src, f, wkbLineString, _book->GetGeomType(), proj, _layer->proj()))
{
vector<mapnik::feature_ptr> splitted;
GMsg msg = MapnikUtils::split(f, src, _book->GetGeomType(), splitted, _layer->proj(), proj);
if (msg != G_NOERR) {
if (msg.is_error()) retmsg = msg;
} else {
edited_in_splitting.insert(pair<long, vector<feature_ptr> >(it->first, splitted));
}
}
}
unsigned int num = edited_in_splitting.size();
if (num == 0) return retmsg;
_undoStack->beginMacro(num == 1 ? "Split feature" : "Split features");
for (unordered_map<long, vector<feature_ptr> >::const_iterator it = edited_in_splitting.begin();
it != edited_in_splitting.end(); it++)
{
long fid = it->first;
vector<feature_ptr> fs = it->second;
Q_ASSERT(_deletedFeatures.find(fid) == _deletedFeatures.end());
_undoStack->push(new VBCommandDeleteFeature(this, fid));
for (unsigned int i = 0; i != fs.size(); i++) {
feature_ptr f = fs.at(i);
f->set_id(_fidCandidate);
f->put<value_unicode_string>(
_config_app().VIEW_VECTORBUFFER_FIELD_EDITED,
transcoder("utf-8").transcode("edited"));
_undoStack->push(new VBCommandAddFeature(this, _fidCandidate, f));
_fidCandidate++;
}
}
_undoStack->endMacro();
return retmsg;
}