script_name = "Sor duplikálás"
script_description = "Duplikál egy sort és az előző sor hosszával lépteti előre."
script_author = "Hughes - isshotosho.info"

function table.shallow_copy(t)
	local t2 = {}
	for k,v in pairs(t) do
		t2[k] = v
	end
	return t2
end


function dup(subtitles, selected_lines, active_line)
	local result, line, duration = nil
	-- lemasoljuk a kivalasztottak tablajat
	-- mert minden table ertek adas referencia alapu
	result = table.shallow_copy(selected_lines)
	
	-- i -> kivalasztott sor index
	-- v -> kivalasztott sor szama
	for i,v in pairs(selected_lines) do	
		line = subtitles[v] -- line -> table object
		
		duration = line.end_time - line.start_time
		line.start_time = duration + line.start_time
		line.end_time = duration + line.end_time
		result[i] = line
	end
	
	return result
end

function duplicate_macro(subs, selected_lines, active_line)
	-- i -> kivalasztott sor index
	-- line -> table object
	aegisub.set_undo_point("duplicateAndShift")
	aegisub.progress.task('Sorok duplikálása...')

	for i,line in pairs(dup(subs, selected_lines, active_line)) do
		subs.insert(selected_lines[i] + i, line)
	end
	
	-- allitsuk be a kivalasztott sorokat
	local result = {}
	for k,v in pairs(selected_lines) do
		result[#result+1] = k+v
	end
	aegisub.progress.task('kész...')
	aegisub.progress.set(100)
	return result
end

function duplicate_group_macro(subs, selected_lines, active_line)
	aegisub.set_undo_point("duplicateAndShift")
	
	-- duplikáljuk
	subs.insert(selected_lines[#selected_lines] + 1, unpack(dup(subs, selected_lines, active_line)))
	local result = {}
	
	-- csoportosítsunk
	for i = 1, #selected_lines do
		result[#result + 1] = selected_lines[#selected_lines] + i
	end
	
	return result
end

function validate(subtitles, selected_lines)
	if #selected_lines > 0 then
		return true
	end
	
	return false
end

aegisub.register_macro(script_name, script_description, duplicate_macro, validate)
aegisub.register_macro(script_name .. " és csoportosítás", script_description, duplicate_group_macro, validate)