From 0f54f546b90a4ed6f1327cc556089025b542d328 Mon Sep 17 00:00:00 2001
From: Silvio Rhatto <rhatto@riseup.net>
Date: Thu, 29 Mar 2018 12:32:54 -0300
Subject: Adds xrandr.lua

---
 config.dot/awesome.link/xrandr.lua | 135 +++++++++++++++++++++++++++++++++++++
 1 file changed, 135 insertions(+)
 create mode 100644 config.dot/awesome.link/xrandr.lua

diff --git a/config.dot/awesome.link/xrandr.lua b/config.dot/awesome.link/xrandr.lua
new file mode 100644
index 0000000..bd90c19
--- /dev/null
+++ b/config.dot/awesome.link/xrandr.lua
@@ -0,0 +1,135 @@
+--- Separating Multiple Monitor functions as a separeted module (taken from awesome wiki)
+
+local awful     = require("awful")
+local naughty   = require("naughty")
+
+-- A path to a fancy icon
+local icon_path = ""
+
+-- Get active outputs
+local function outputs()
+   local outputs = {}
+   local xrandr = io.popen("xrandr -q --current")
+
+   if xrandr then
+      for line in xrandr:lines() do
+         local output = line:match("^([%w-]+) connected ")
+         if output then
+            outputs[#outputs + 1] = output
+                                   end
+      end
+      xrandr:close()
+   end
+
+   return outputs
+end
+
+local function arrange(out)
+   -- We need to enumerate all permutations of horizontal outputs.
+
+   local choices  = {}
+   local previous = { {} }
+   for i = 1, #out do
+      -- Find all permutation of length `i`: we take the permutation
+      -- of length `i-1` and for each of them, we create new
+      -- permutations by adding each output at the end of it if it is
+      -- not already present.
+      local new = {}
+      for _, p in pairs(previous) do
+         for _, o in pairs(out) do
+            if not awful.util.table.hasitem(p, o) then
+               new[#new + 1] = awful.util.table.join(p, {o})
+            end
+         end
+      end
+      choices = awful.util.table.join(choices, new)
+      previous = new
+   end
+
+   return choices
+end
+
+-- Build available choices
+local function menu()
+   local menu = {}
+   local out = outputs()
+   local choices = arrange(out)
+
+   for _, choice in pairs(choices) do
+      local cmd = "xrandr"
+      -- Enabled outputs
+      for i, o in pairs(choice) do
+         cmd = cmd .. " --output " .. o .. " --auto"
+         if i > 1 then
+            cmd = cmd .. " --right-of " .. choice[i-1]
+         end
+      end
+      -- Disabled outputs
+      for _, o in pairs(out) do
+         if not awful.util.table.hasitem(choice, o) then
+            cmd = cmd .. " --output " .. o .. " --off"
+         end
+      end
+
+      local label = ""
+      if #choice == 1 then
+         label = 'Only <span weight="bold">' .. choice[1] .. '</span>'
+      else
+         for i, o in pairs(choice) do
+            if i > 1 then label = label .. " + " end
+            label = label .. '<span weight="bold">' .. o .. '</span>'
+         end
+      end
+
+      menu[#menu + 1] = { label, cmd }
+   end
+
+   return menu
+end
+
+-- Display xrandr notifications from choices
+local state = { cid = nil }
+
+local function naughty_destroy_callback(reason)
+  if reason == naughty.notificationClosedReason.expired or
+     reason == naughty.notificationClosedReason.dismissedByUser then
+    local action = state.index and state.menu[state.index - 1][2]
+    if action then
+      awful.util.spawn(action, false)
+      state.index = nil
+    end
+  end
+end
+
+local function xrandr()
+   -- Build the list of choices
+   if not state.index then
+      state.menu = menu()
+      state.index = 1
+   end
+
+   -- Select one and display the appropriate notification
+   local label, action
+   local next  = state.menu[state.index]
+   state.index = state.index + 1
+
+   if not next then
+      label = "Keep the current configuration"
+      state.index = nil
+   else
+      label, action = unpack(next)
+   end
+   state.cid = naughty.notify({ text = label,
+                                icon = icon_path,
+                                timeout = 4,
+                                screen = mouse.screen,
+                                replaces_id = state.cid,
+                                destroy = naughty_destroy_callback}).id
+end
+
+return {
+   outputs = outputs,
+   arrange = arrange,
+   menu = menu,
+   xrandr = xrandr
+}
-- 
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