X-Git-Url: https://git.madduck.net/etc/awesome.git/blobdiff_plain/40798583795b58e496db607d9d23324b4a7ae09c..4c392a6d980af9c72052145c6a7a812c51e6ecee:/.config/awesome/lain/widget/contrib/redshift.lua

diff --git a/.config/awesome/lain/widget/contrib/redshift.lua b/.config/awesome/lain/widget/contrib/redshift.lua
new file mode 100644
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+++ b/.config/awesome/lain/widget/contrib/redshift.lua
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+
+--[[
+                                                        
+     Licensed under GNU General Public License v2       
+      * (c) 2014, blueluke <http://github.com/blueluke> 
+                                                        
+--]]
+
+local async   = require("lain.helpers").async
+local awful   = require("awful")
+local execute = os.execute
+local type    = type
+
+-- Redshift
+-- lain.widget.contrib.redshift
+local redshift = { active = false, pid = nil }
+
+function redshift:start()
+    execute("pkill redshift")
+    awful.spawn.with_shell("redshift -x") -- clear adjustments
+    redshift.pid = awful.spawn.with_shell("redshift")
+    redshift.active = true
+    if type(redshift.update_fun) == "function" then
+        redshift.update_fun(redshift.active)
+    end
+end
+
+function redshift:toggle()
+    async({ awful.util.shell, "-c", string.format("ps -p %d -o pid=", redshift.pid) }, function(f)
+        if f and #f > 0 then -- redshift is running
+            -- Sending -USR1 toggles redshift (See project website)
+            execute("pkill -USR1 redshift")
+            redshift.active = not redshift.active
+        else -- not started or killed, (re)start it
+            redshift:start()
+        end
+        redshift.update_fun(redshift.active)
+    end)
+end
+
+-- Attach to a widget
+-- Provides a button which toggles redshift on/off on click
+-- @param widget:  Widget to attach to.
+-- @param fun:     Function to be run each time redshift is toggled (optional).
+--                 Use it to update widget text or icons on status change.
+function redshift:attach(widget, fun)
+    redshift.update_fun = fun or function() end
+    if not redshift.pid then redshift:start() end
+    if widget then
+        widget:buttons(awful.util.table.join(awful.button({}, 1, function () redshift:toggle() end)))
+    end
+end
+
+return redshift