official/select_duplicates - Added script to detect and select duplicates.
Script adds a button to the select images module.
This commit is contained in:
Bill Ferguson
266
official/select_duplicates.lua
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266
official/select_duplicates.lua
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--[[
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select_duplicates.lua - select duplicate images from a collection
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Copyright (C) 2026 Bill Ferguson <wpferguson@gmail.com>.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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]]
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--[[
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select_duplicates - select duplicate images from a collection
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select_duplicates adds a button to the select module to select
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duplicate images from a collection. If the selection2collection
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script is also active an option is available to have the selected
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duplicates appear as a temporary collection.
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A shortcut is available to select the duplicates from the collection
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but it is somewhat slower because it doesn't have access to the current
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image cache and therfore has to open each image separately.
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ADDITIONAL SOFTWARE NEEDED FOR THIS SCRIPT
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None
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USAGE
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* enable in script manager
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* Press the button
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BUGS, COMMENTS, SUGGESTIONS
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Bill Ferguson <wpferguson@gmail.com>
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CHANGES
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]]
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local dt = require "darktable"
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local du = require "lib/dtutils"
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-- local df = require "lib/dtutils.file"
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-- local ds = require "lib/dtutils.string"
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-- local dtsys = require "lib/dtutils.system"
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local log = require "lib/dtutils.log"
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-- local debug = require "darktable.debug"
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-- - - - - - - - - - - - - - - - - - - - - - - -
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-- A P I C H E C K
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-- - - - - - - - - - - - - - - - - - - - - - - -
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du.check_min_api_version("7.0.0", MODULE) -- choose the minimum version that contains the features you need
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-- - - - - - - - - - - - - - - - - - - - - - - - - -
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-- I 1 8 N
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-- - - - - - - - - - - - - - - - - - - - - - - - - -
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local gettext = dt.gettext.gettext
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local function _(msgid)
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return gettext(msgid)
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end
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-- - - - - - - - - - - - - - - - - - - - - - - - - -
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-- S C R I P T M A N A G E R I N T E G R A T I O N
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-- - - - - - - - - - - - - - - - - - - - - - - - - -
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local script_data = {}
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script_data.destroy = nil -- function to destory the script
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script_data.destroy_method = nil -- set to hide for libs since we can't destroy them commpletely yet
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script_data.restart = nil -- how to restart the (lib) script after it's been hidden - i.e. make it visible again
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script_data.show = nil -- only required for libs since the destroy_method only hides them
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script_data.metadata = {
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name = _("select duplicates"), -- visible name of script
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purpose = _("select duplicate images from a collection"), -- purpose of script
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author = "Bill Ferguson <wpferguson@gmail.com>", -- your name and optionally e-mail address
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help = "https://docs.darktable.org/lua/stable/lua.scripts.manual/scripts/official/select_duplicates/" -- URL to help/documentation
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}
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-- - - - - - - - - - - - - - - - - - - - - - - -
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-- C O N S T A N T S
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-- - - - - - - - - - - - - - - - - - - - - - - -
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local MODULE <const> = "select_duplicates"
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local DEFAULT_LOG_LEVEL <const> = log.info
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local TMP_DIR <const> = dt.configuration.tmp_dir
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-- path separator
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local PS <const> = dt.configuration.running_os == "windows" and "\\" or "/"
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-- command separator
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local CS <const> = dt.configuration.running_os == "windows" and "&" or ";"
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-- - - - - - - - - - - - - - - - - - - - - - - -
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-- L O G L E V E L
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-- - - - - - - - - - - - - - - - - - - - - - - -
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log.log_level(DEFAULT_LOG_LEVEL)
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-- - - - - - - - - - - - - - - - - - - - - - - -
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-- N A M E S P A C E
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-- - - - - - - - - - - - - - - - - - - - - - - -
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local select_duplicates = {}
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-- - - - - - - - - - - - - - - - - - - - - - - -
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-- G L O B A L V A R I A B L E S
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-- - - - - - - - - - - - - - - - - - - - - - - -
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select_duplicates.log_level = DEFAULT_LOG_LEVEL
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select_duplicates.create_collection = false
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-- - - - - - - - - - - - - - - - - - - - - - - -
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-- P R E F E R E N C E S
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-- - - - - - - - - - - - - - - - - - - - - - - -
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dt.preferences.register(MODULE, "create_collection", "bool",
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script_data.metadata.name .. _(" create collection from selection"),
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_("create collection of selected duplicates"), false)
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-- - - - - - - - - - - - - - - - - - - - - - - -
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-- A L I A S E S
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-- - - - - - - - - - - - - - - - - - - - - - - -
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local namespace = select_duplicates
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local sd = select_duplicates
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-- - - - - - - - - - - - - - - - - - - - - - - -
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-- F U N C T I O N S
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-- - - - - - - - - - - - - - - - - - - - - - - -
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-------------------
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-- helper functions
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-------------------
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local function set_log_level(level)
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if not level then
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level = namespace.log_level
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end
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local old_log_level = log.log_level()
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log.log_level(level)
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return old_log_level
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end
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local function restore_log_level(level)
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if not level then
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level = namespace.log_level
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end
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log.log_level(level)
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end
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local function reset_log_level()
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log.log_level(DEFAULT_LOG_LEVEL)
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namespace.log_level = DEFAULT_LOG_LEVEL
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end
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local function pref_read(name, pref_type)
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local old_log_level = set_log_level(namespace.log_level)
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log.msg(log.debug, "name is " .. name .. " and type is " .. pref_type)
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local val = dt.preferences.read(MODULE, name, pref_type)
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log.msg(log.debug, "read value " .. tostring(val))
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restore_log_level(old_log_level)
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return val
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end
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local function pref_write(name, pref_type, value)
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local old_log_level = set_log_level(namespace.log_level)
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log.msg(log.debug, "writing value " .. tostring(value) .. " for name " .. name)
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dt.preferences.write(MODULE, name, pref_type, value)
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restore_log_level(old_log_level)
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end
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local function select_duplicate_files(event, images)
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local duplicates = {}
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local sorted_files = {}
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sd.create_collection = pref_read("create_collection", "bool")
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for _, img in ipairs(images) do
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local rawname = img.path .. PS .. img.filename
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if not sorted_files[rawname] then
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sorted_files[rawname] = {}
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end
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table.insert(sorted_files[rawname], img)
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end
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for k,v in pairs(sorted_files) do
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if #v > 1 then
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local old_image = nil
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for _,i in ipairs(v) do
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if not old_image then
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old_image = i
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else
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if i.duplicate_index > old_image.duplicate_index then
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table.insert(duplicates, i)
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else
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table.insert(duplicates, old_image)
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old_image = i
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end
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end
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end
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end
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end
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if sd.create_collection then
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dt.util.message(MODULE, "selection2collection", "create")
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end
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return duplicates
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end
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-- - - - - - - - - - - - - - - - - - - - - - - -
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-- M A I N P R O G R A M
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-- - - - - - - - - - - - - - - - - - - - - - - -
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-- - - - - - - - - - - - - - - - - - - - - - - -
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-- U S E R I N T E R F A C E
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-- - - - - - - - - - - - - - - - - - - - - - - -
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dt.gui.libs.select.register_selection(MODULE, _("select duplicates"), select_duplicate_files,
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_("select duplicated images"))
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-- - - - - - - - - - - - - - - - - - - - - - - -
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-- D A R K T A B L E I N T E G R A T I O N
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-- - - - - - - - - - - - - - - - - - - - - - - -
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local function destroy()
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dt.gui.libs.select.destroy_selection(MODULE)
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end
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script_data.destroy = destroy
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-- - - - - - - - - - - - - - - - - - - - - - - -
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-- E V E N T S
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-- - - - - - - - - - - - - - - - - - - - - - - -
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if not dt.query_event(MODULE, "shortcut") then -- skip if shortcut already registered
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dt.register_event(MODULE, "shortcut",
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function(event, shortcut)
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local duplicates = select_duplicate_files(event, dt.collection)
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if duplicates then
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dt.gui.selection(duplicates)
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end
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end, _("select duplicates")
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)
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end
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return script_data
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