Create yield.lua

darktable yield compatibility script

Author: supertobi

official/yield.lua

@@ -0,0 +1,57 @@
+--[[
+    This file is part of darktable,
+    Copyright 2016 by Tobias Jakobs.
+
+    This program 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.
+
+    This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+]]
+--[[
+darktable yield compatibility script
+
+USAGE
+* require this script from your main Lua file in the first line
+
+]]
+local dt = require "darktable"
+local yield_orig = coroutine.yield
+
+-- ToDo: Test with dt master
+--[[
+if (dt.configuration.api_version_major >= 4) then
+  coroutine.yield = function(yield_type, command)
+    if (yield_type == "RUN_COMMAND") then
+      dt.control.execute(command)
+    elseif (yield_type == "FILE_READABLE") then
+      dt.control.read(command)
+    elseif (yield_type == "WAIT_MS") then
+      dt.control.sleep(command)
+    end  
+  end
+end
+]]
+
+if (dt.configuration.api_version_major < 4) then
+  dt.control = {}
+  dt.control.execute = function(command)
+    yield_orig("RUN_COMMAND", command)
+  end
+  dt.control.read = function(command)
+    yield_orig("FILE_READABLE", command)
+  end
+  dt.control.sleep = function(command)
+    yield_orig("WAIT_MS", command)
+  end
+end
+
+-- vim: shiftwidth=2 expandtab tabstop=2 cindent syntax=lua
+-- kate: hl Lua;