0x.MinMaxTimestamps.lua

-- Copyright (c) 2020, The0x539 <[email protected]>
--
-- Permission to use, copy, modify, and distribute this software for any
-- purpose with or without fee is hereby granted, provided that the above
-- copyright notice and this permission notice appear in all copies.
--
-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-- ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-- ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
-- OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

local tr = aegisub.gettext

script_name = tr"Set min-max timestamps"
script_description = tr"Set all lines in selection to have the same (earliest+latest) start/end times"
script_author = "The0x539"
script_version = "1"

function minmax(subs, sel, _)
	aegisub.progress.title("Min-Max Timestamps")

	local earliest, latest = math.huge, 0

	aegisub.progress.task("Determining earliest/latest timestamps")
	for n, i in ipairs(sel) do
		aegisub.progress.set(100 * (n - 1)/(#sel - 1))

		earliest = math.min(earliest, subs[i].start_time)
		latest = math.max(latest, subs[i].end_time)
	end

	aegisub.progress.set("Applying timestamps")
	for n, i in ipairs(sel) do
		aegisub.progress.set(100 * (n - 1)/(#sel - 1))

		local line = subs[i]
		line.start_time = earliest
		line.end_time = latest
		subs[i] = line
	end

    aegisub.set_undo_point(tr"minmax timestamps")
end

aegisub.register_macro(script_name, script_description, minmax)