official/save_selection : new script

This scrips adds a shortcut to manipulate multiple selection save-buffers

official/save_selection.lua

@@ -0,0 +1,57 @@
+--[[
+  This file is part of darktable,
+  copyright (c) 2014 Jérémy Rosen
+  
+  darktable is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+  
+  darktable is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+  
+  You should have received a copy of the GNU General Public License
+  along with darktable.  If not, see <http://www.gnu.org/licenses/>.
+]]
+--[[
+SAVE SELECTION
+Simple shortcuts to have multiple selection bufers
+
+
+USAGE
+* require this file from your main lua config file:
+* go to configuration => preferences => lua
+* set the shortcuts you want to use
+
+This plugin will provide shortcuts to save to and restore from up to five temporary buffers
+
+This plugin also provides a shortcut to swap the current selection with a quick-swap buffer
+
+The variable "buffer_count" controls the number of selection buffers, 
+increase it if you need more temporary selection buffers
+
+]]
+local dt = require "darktable"
+dt.configuration.check_version(...,{2,0,0})
+
+local buffer_count = 5
+
+for i=1,buffer_count do
+  local saved_selection
+  dt.register_event("shortcut",function()
+    saved_selection = dt.gui.selection()
+  end,"save to buffer "..i)
+  dt.register_event("shortcut",function()
+    dt.gui.selection(saved_selection)
+  end,"restor from buffer "..i)
+end
+
+local bounce_buffer = {}
+dt.register_event("shortcut",function()
+  bounce_buffer = dt.gui.selection(bounce_buffer)
+end,"switch selection with temporary buffer")
+
+--
+-- vim: shiftwidth=2 expandtab tabstop=2 cindent syntax=lua