Merge branch 'master' into mixer-snapshots

scripts/_sort_tracks_by_name.lua

@@ -0,0 +1,36 @@
+ardour {
+	["type"] = "EditorAction",
+	name = "Track Sort",
+	author = "Ardour Lua Taskforce",
+	description = [[Sort tracks alphabetically by name]]
+}
+
+function factory () return function ()
+
+	-- sort compare function
+	-- a,b here are http://manual.ardour.org/lua-scripting/class_reference/#ARDOUR:Route
+	-- return true if route "a" should be ordered before route "b"
+	function tsort (a, b)
+		return a:name() < b:name()
+	end
+
+	-- create a sortable list of tracks
+	local tracklist = {}
+	for t in Session:get_tracks():iter() do
+		table.insert(tracklist, t)
+	end
+
+	-- sort the list using the compare function
+	table.sort(tracklist, tsort)
+
+	-- traverse the sorted list and assign "presentation-order" to each track
+	local pos = 1;
+	for _, t in ipairs(tracklist) do
+		t:set_presentation_order(pos)
+		pos = pos + 1
+	end
+
+	-- drop all track references
+	tracklist = nil
+	collectgarbage ()
+end end