// For connection only: lookup matching ports to connect.
func getMatchingPorts(fts *models.FilesTreeStore, object tr.TreeElementIf) (ret []bh.PortIf) {
var thisPort bh.PortIf
switch object.(type) {
case bh.PortIf:
thisPort = object.(bh.PortIf)
case bh.ConnectionIf:
log.Fatal("getMatchingPorts error: expecting Port, not Connection")
default:
log.Fatal("getMatchingPorts error: expecting Port")
}
thisNode := thisPort.Node()
graph := thisNode.Context()
for _, n := range graph.Nodes() {
var ports []bh.PortIf
if thisPort.Direction() == gr.InPort {
ports = n.OutPorts()
} else {
ports = n.InPorts()
}
for _, p := range ports {
if p.SignalType().TypeName() == thisPort.SignalType().TypeName() {
ret = append(ret, p)
}
}
}
return
}
func portConnect(port1 bh.PortIf, c *connection) error {
p1 := port1.(*port)
var port2 bh.PortIf
var p2 *port
if c.from.(*port) == p1 {
port2 = c.to
} else if c.to.(*port) == p1 {
port2 = c.from
}
p2 = port2.(*port)
if port1.SignalType().TypeName() != port2.SignalType().TypeName() {
return fmt.Errorf("type mismatch")
}
if port1.Direction() == port2.Direction() {
return fmt.Errorf("direction mismatch")
}
p1.connected.Append(port2.(*port))
p1.conn = append(p1.conn, c)
p2.connected.Append(port1.(*port))
p2.conn = append(p2.conn, c)
return nil
}
func CreateXmlOutPort(p bh.PortIf) (xmlp *backend.XmlOutPort) {
xmlp = backend.XmlOutPortNew(p.Name(), p.SignalType().TypeName())
xmlp.Entry = freesp.CreateXmlModePosition(p).Entry
return
}