Support LV2 UIs with uncommon GUI toolkits.

These will use LV2 UI's fallback API, "showInterface" and
"idleInterface", which jalv supports, but only when running the
non-toolkit version. The name "UI" is taken from the LV2 specification
itself; it is the base class of all of the others, like "GtkUI" and
"X11UI".

Signed-off-by: Kristian Amlie <kristian@amlie.name>

Author: kramlie

zyngine/zynthian_engine_jalv.py

@@ -196,14 +196,17 @@ def __init__(self, eng_code, state_manager, dryrun=False, jackname=None):
             logging.debug("CREATING JALV ENGINE => {}".format(self.jackname))
 
             if self.config_remote_display() and self.native_gui:
-                if self.native_gui == "Qt5UI":
-                    jalv_bin = "jalv.qt5"
-                elif self.native_gui == "Qt4UI":
-                    # jalv_bin = "jalv.qt4"
-                    jalv_bin = "jalv.gtk3"
-                else:  # elif self.native_gui=="X11UI":
-                    jalv_bin = "jalv.gtk3"
-                self.command = [jalv_bin, "--jack-name", self.jackname, self.plugin_url]
+                if self.native_gui == "UI":
+                    self.command = ["jalv", "-s", "-n", self.jackname, self.plugin_url]
+                else:
+                    if self.native_gui == "Qt5UI":
+                        jalv_bin = "jalv.qt5"
+                    elif self.native_gui == "Qt4UI":
+                        # jalv_bin = "jalv.qt4"
+                        jalv_bin = "jalv.gtk3"
+                    else:  # elif self.native_gui=="X11UI":
+                        jalv_bin = "jalv.gtk3"
+                    self.command = [jalv_bin, "--jack-name", self.jackname, self.plugin_url]
             else:
                 self.command = ["jalv", "-n", self.jackname, self.plugin_url]
                 # Some plugins need a X11 display for running headless (QT5, QT6),