Slight rework of my previous commit... now ports can be asked too ;)

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23928 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/print/PrintTransportAddOn.h

@@ -35,18 +35,18 @@ THE SOFTWARE.
 #include <Directory.h>
 #include <Message.h>
 
-// int transport_features; symbol name
+#define B_TRANSPORT_LIST_PORTS_SYMBOL	"list_transport_ports"
 #define B_TRANSPORT_FEATURES_SYMBOL	"transport_features"
 
 // Bit values for 'transport_features'
 enum {
-	B_TRANSPORT_SUPPORTS_PROBE	= 1,
-	B_TRANSPORT_SUPPORTS_SHARING	= 2,
+	B_TRANSPORT_IS_HOTPLUG	= 1,
+	B_TRANSPORT_IS_NETWORK	= 2,
 };
 
 // to be implemented by the transport add-on
 extern "C" BDataIO* instantiate_transport(BDirectory* printer, BMessage* msg);
-extern "C" status_t install_transport_probe(void);
+extern "C" status_t list_transport_ports(BMessage* msg);
 
 #endif
 

src/servers/print/Transport.Scripting.cpp

@@ -17,6 +17,8 @@
 static property_info prop_list[] = {
 	{ "Name", { B_GET_PROPERTY }, { B_DIRECT_SPECIFIER },
 		"Get name of transport" }, 
+	{ "Ports", { B_GET_PROPERTY }, { B_DIRECT_SPECIFIER },
+		"Get currently available ports/devices" },
 	{ 0 } // terminate list 
 };
 
@@ -33,8 +35,16 @@ void Transport::HandleScriptingCommand(BMessage* msg)
 		switch(msg->what) {
 			case B_GET_PROPERTY:
 				if (propName == "Name")
-					result = fName;
-				else { // If unknown scripting request, let superclas handle it
+					result = Name();
+				else if (propName == "Ports") {
+					// Need to duplicate messaging code, as our result is a complex
+					// bmessage, not a string :(
+					BMessage reply(B_REPLY);
+					rc = ListAvailablePorts(&reply);
+					reply.AddInt32("error", rc);
+					msg->SendReply(&reply);
+					break;
+				} else { // If unknown scripting request, let superclas handle it
 					Inherited::MessageReceived(msg);
 					break;
 				}

src/servers/print/Transport.cpp

@@ -112,7 +112,7 @@ status_t Transport::Scan(directory_which which)
 // ---------------------------------------------------------------
 Transport::Transport(const BPath& path)
 	: BHandler(B_EMPTY_STRING),
-	fName(path.Leaf()),
+	fPath(path),
 	fImageID(-1),
 	fFeatures(0)
 {
@@ -130,9 +130,8 @@ Transport::Transport(const BPath& path)
 	} else {
 		fFeatures = *transport_features_ptr;
 
-		if (*transport_features_ptr & B_TRANSPORT_SUPPORTS_PROBE) {
-			// Transport supports probing, so it needs to stay loaded...
-			printf("IRA: Transport %s supports probing!\n", path.Path());
+		if (*transport_features_ptr & B_TRANSPORT_IS_HOTPLUG) {
+			// We are hotpluggable; so keep us loaded!
 			fImageID = id;
 		}
 		else // No extended Transport support; so no need to keep loaded
@@ -148,6 +147,33 @@ Transport::~Transport()
 	sTransports.RemoveItem(this);
 }
 
+// ---------------------------------------------------------------
+status_t Transport::ListAvailablePorts(BMessage* msg)
+{
+	status_t (*list_ports)(BMessage*);
+	image_id id = fImageID;
+	status_t rc = B_OK;
+
+	// Load image if not loaded yet
+	if (id == -1 && (id=load_add_on(fPath.Path())) < 0)
+		return id;
+
+	// Get pointer to addon function
+	if ((rc=get_image_symbol(id, B_TRANSPORT_LIST_PORTS_SYMBOL, 
+			B_SYMBOL_TYPE_TEXT, (void**)&list_ports)) != B_OK)
+		goto done;
+
+	// run addon...
+	rc = (*list_ports)(msg);
+
+done:
+	// clean up if needed
+	if (fImageID != id)
+		unload_add_on(id);
+
+	return rc;
+}
+
 // ---------------------------------------------------------------
 // MessageReceived
 //

src/servers/print/Transport.h

@@ -24,7 +24,9 @@ public:
 	Transport(const BPath& path);
 	~Transport();
 
-	const BString& Name() const { return fName; }
+	BString Name() const { return fPath.Leaf(); }
+
+	status_t ListAvailablePorts(BMessage* msg);
 
 	static status_t Scan(directory_which which);
 
@@ -42,7 +44,7 @@ public:
 								int32 form, const char* prop);
 	
 private:
-	BString fName;
+	BPath fPath;
 	long fImageID;
 	int fFeatures;