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livetrax/share/scripts/split_all_markers.lua

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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, ARDOUR.MusicSample (l:start(), 0))
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-- 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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-- render an icon for the toolbar action-button
-- this is genrally square width == height.
-- The background is set according to the theme (leave transparent when drawing).
-- A foreground color is passed as parameter 'fg'
--
-- ctx is-a http://manual.ardour.org/lua-scripting/class_reference/#Cairo:Context
-- 2D vector graphics http://cairographics.org/
function icon (params) return function (ctx, width, height, fg)
local mh = height - 3.5;
local m3 = width / 3;
local m6 = width / 6;
ctx:set_line_width (.5)
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-- compare to gtk2_ardour/marker.cc "Marker"
ctx:set_source_rgba (.8, .8, .2, 1.0)
ctx:move_to (width / 2 - m6, 2)
ctx:rel_line_to (m3, 0)
ctx:rel_line_to (0, mh * 0.4)
ctx:rel_line_to (-m6, mh * 0.6)
ctx:rel_line_to (-m6, -mh * 0.6)
ctx:close_path ()
ctx:fill_preserve ()
ctx:set_source_rgba (.0, .0, .0, 1.0)
ctx:stroke ()
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-- draw an arrow <--|--> on top, using the foreground color
ctx:set_source_rgba (ARDOUR.LuaAPI.color_to_rgba (fg))
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ctx:set_line_width (1)
ctx:move_to (width * .5, height * .4)
ctx:line_to (width * .5, height * .6)
ctx:stroke ()
ctx:move_to (2, height * .5)
ctx:line_to (width - 2, height * .5)
ctx:stroke ()
ctx:move_to (width - 2, height * .5)
ctx:rel_line_to (-m6, -m6)
ctx:rel_line_to (0, m3)
ctx:close_path ()
ctx:fill ()
ctx:move_to (2, height * .5)
ctx:rel_line_to (m6, -m6)
ctx:rel_line_to (0, m3)
ctx:close_path ()
ctx:fill ()
end end