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ardour { ["type"] = "EditorAction", name = "Marker Split",
license = "MIT",
author = "Ardour Team",
description = [[Split regions on selected tracks at all locations markers]]
}
function factory (params) return function ()
local loc = Session:locations () -- all marker locations
-- http://manual.ardour.org/lua-scripting/class_reference/#ArdourUI:Selection
local sel = Editor:get_selection ()
-- prepare undo operation
-- see http://manual.ardour.org/lua-scripting/class_reference/#ARDOUR:Session
Session:begin_reversible_command ("Auto Region Split")
local add_undo = false -- keep track if something has changed
-- Track/Bus Selection -- iterate over all Editor-GUI selected tracks
-- http://manual.ardour.org/lua-scripting/class_reference/#ArdourUI:TrackSelection
for r in sel.tracks:routelist ():iter () do
-- each of the items 'r' is-a
-- http://manual.ardour.org/lua-scripting/class_reference/#ARDOUR:Route
local track = r:to_track () -- see if it's a track
if track:isnil () then
-- if not, skip it
goto continue
end
-- get track's playlist
-- http://manual.ardour.org/lua-scripting/class_reference/#ARDOUR:Playlist
local playlist = track:playlist ()
-- clear existing changes, prepare "diff" of state for undo
playlist:to_stateful ():clear_changes ()
-- iterate over all location markers
for l in loc:list ():iter () do
if l:is_mark() then
-- get all regions on the given track's playlist (may be stacked)
for reg in playlist:regions_at (l:start ()):iter () do
playlist:split_region (reg, l:start (), 0)
-- the above operation will invalidate the playlist's region list:
-- split creates 2 new regions.
--
-- Hence this script does it the way it does: the inner-most loop
-- is over playlist-regions.
end
end
end
-- collect undo data
if not Session:add_stateful_diff_command (playlist:to_statefuldestructible ()):empty () then
-- is something has changed, we need to save it at the end.
add_undo = true
end
::continue::
end
-- all done, commit the combined Undo Operation
if add_undo then
-- the 'nil' Command here mean to use the collected diffs added above
Session:commit_reversible_command (nil)
else
Session:abort_reversible_command ()
end
end end
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