Fix Plugin=>UI ring overflow handling.

Gracefully handle client receiving nodes with as-yet unknown plugins.
Don't initially send all plugins to UI (kills LV2 in particular),
request on demand instead.


git-svn-id: http://svn.drobilla.net/lad/trunk/ingen@4829 a436a847-0d15-0410-975c-d299462d15a1

5 files changed, 17 insertions, 3 deletions

diff --git a/src/gui/App.cpp b/src/gui/App.cpp
index 96bb1254..4174fbac 100644
--- a/src/gui/App.cpp
+++ b/src/gui/App.cpp
@@ -72,6 +72,7 @@ App::App(Ingen::World* world)
 	, _world(world)
 	, _sample_rate(48000)
 	, _enable_signal(true)
+	, _requested_plugins(false)
 {
 	Glib::set_application_name("Ingen");
 	gtk_window_set_default_icon_name("ingen");
@@ -187,6 +188,15 @@ App::detach()
 	}
 }
 
+void
+App::request_plugins_if_necessary()
+{
+	if (!_requested_plugins) {
+		_world->interface()->get(Raul::URI("ingen:plugins"));
+		_requested_plugins = true;
+	}
+}
+
 SharedPtr<Serialisation::Serialiser>
 App::serialiser()
 {
diff --git a/src/gui/App.hpp b/src/gui/App.hpp
index ac909b2f..8cf2b61e 100644
--- a/src/gui/App.hpp
+++ b/src/gui/App.hpp
@@ -78,6 +78,8 @@ public:
 
 	void detach();
 
+	void request_plugins_if_necessary();
+
 	void register_callbacks();
 	bool gtk_main_iteration();
 
@@ -170,6 +172,7 @@ protected:
 	ActivityPorts _activity_ports;
 
 	bool _enable_signal;
+	bool _requested_plugins;
 };
 
 } // namespace GUI
diff --git a/src/gui/GraphCanvas.cpp b/src/gui/GraphCanvas.cpp
index d6c4d01b..4eba15db 100644
--- a/src/gui/GraphCanvas.cpp
+++ b/src/gui/GraphCanvas.cpp
@@ -151,6 +151,8 @@ GraphCanvas::GraphCanvas(App&                        app,
 void
 GraphCanvas::show_menu(bool position, unsigned button, uint32_t time)
 {
+	_app.request_plugins_if_necessary();
+
 	if (!_internal_menu)
 		build_menus();
 
diff --git a/src/gui/WindowFactory.cpp b/src/gui/WindowFactory.cpp
index 717f1f63..57a21536 100644
--- a/src/gui/WindowFactory.cpp
+++ b/src/gui/WindowFactory.cpp
@@ -191,6 +191,8 @@ void
 WindowFactory::present_load_plugin(SharedPtr<const GraphModel> graph,
                                    Node::Properties            data)
 {
+	_app.request_plugins_if_necessary();
+
 	GraphWindowMap::iterator w = _graph_windows.find(graph->path());
 
 	if (w != _graph_windows.end())
diff --git a/src/gui/ingen_gui_lv2.cpp b/src/gui/ingen_gui_lv2.cpp
index 49795a83..40f37dc7 100644
--- a/src/gui/ingen_gui_lv2.cpp
+++ b/src/gui/ingen_gui_lv2.cpp
@@ -132,9 +132,6 @@ instantiate(const LV2UI_Descriptor*   descriptor,
 		                      ui->world->forge(),
 		                      *ui->client.get()));
 
-	// Request plugins
-	ui->world->interface()->get(Raul::URI("ingen:plugins"));
-
 	// Create empty root graph model
 	Ingen::Resource::Properties props;
 	props.insert(std::make_pair(ui->app->uris().rdf_type,