Lua bindings to access editor selection + region selection bindings

scripts/select_every_2nd_region.lua

@@ -0,0 +1,42 @@
+ardour {
+	["type"]    = "EditorAction",
+	name        = "Region Select/2",
+	license     = "MIT",
+	author      = "Ardour Team",
+	description = [[select every 2nd region on all selected tracks]]
+}
+
+-- select every 2nd region on all selected tracks
+function factory () return function ()
+
+	local sl = ArdourUI.SelectionList () -- empty selection list
+
+	local sel = Editor:get_selection () -- get current selection
+	-- for each selected track/bus..
+	for route in sel.tracks:routelist ():iter () do
+		-- consider only tracks
+		local track = route:to_track ()
+		if track:isnil() then
+			goto continue
+		end
+
+		local skip = false;
+		-- iterate over all regions of the given track
+		for region in track:playlist():region_list():iter() do
+			if skip then
+				-- skip every 2nd region
+				skip = false;
+			else
+				skip = true;
+				-- get RegionView (GUI object to be selected)
+				local rv = Editor:get_regionview_from_region (region)
+				-- add it to the list of Objects to be selected
+				sl:push_back (rv);
+			end
+		end
+		::continue::
+	end
+
+	-- set/replace current selection in the editor
+	Editor:set_selection (sl, ArdourUI.SelectionOp.Set);
+end end