IECore::ConstCompoundObjectPtr Prune::computeGlobals( const Gaffer::Context *context, const ScenePlug *parent ) const
{
ConstCompoundObjectPtr inputGlobals = inPlug()->globalsPlug()->getValue();
const CompoundData *inputSets = inputGlobals->member<CompoundData>( "gaffer:sets" );
if( !inputSets )
{
return inputGlobals;
}
CompoundObjectPtr outputGlobals = inputGlobals->copy();
CompoundDataPtr outputSets = new CompoundData;
outputGlobals->members()["gaffer:sets"] = outputSets;
ContextPtr tmpContext = new Context( *Context::current() );
Context::Scope scopedContext( tmpContext );
ScenePath path;
for( CompoundDataMap::const_iterator it = inputSets->readable().begin(), eIt = inputSets->readable().end(); it != eIt; ++it )
{
/// \todo This could be more efficient if PathMatcher exposed the internal nodes,
/// and allowed sharing between matchers. Then we could do a really lightweight copy
/// and just trim out the nodes we didn't want.
const PathMatcher &inputSet = static_cast<const PathMatcherData *>( it->second.get() )->readable();
PathMatcher &outputSet = outputSets->member<PathMatcherData>( it->first, /* throwExceptions = */ false, /* createIfMissing = */ true )->writable();
vector<string> inputPaths;
inputSet.paths( inputPaths );
for( vector<string>::const_iterator pIt = inputPaths.begin(), peIt = inputPaths.end(); pIt != peIt; ++pIt )
{
path.clear();
ScenePlug::stringToPath( *pIt, path );
tmpContext->set( ScenePlug::scenePathContextName, path );
if( !(filterPlug()->getValue() & ( Filter::ExactMatch | Filter::AncestorMatch ) ) )
{
outputSet.addPath( *pIt );
}
}
}
return outputGlobals;
}
