From e801a3f55671aca3b884fe5e7da1d83446261907 Mon Sep 17 00:00:00 2001
From: Xinhao Yuan <xinhaoyuan@gmail.com>
Date: Sat, 6 Jul 2019 11:35:12 -0400
Subject: [PATCH] switcher

---
 switcher.lua | 84 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 switcher.lua

diff --git a/switcher.lua b/switcher.lua
new file mode 100644
index 0000000..1f593ee
--- /dev/null
+++ b/switcher.lua
@@ -0,0 +1,84 @@
+local api = {
+   beautiful  = require("beautiful"),
+   wibox      = require("wibox"),
+   awful      = require("awful"),
+   screen     = require("awful.screen"),
+   layout     = require("awful.layout"),
+   keygrabber = require("awful.keygrabber"),
+   naughty    = require("naughty"),
+   gears      = require("gears"),
+   dpi        = require("beautiful.xresources").apply_dpi,
+}
+
+local label_font_family = api.beautiful.get_font(
+   api.beautiful.mono_font or api.beautiful.font):get_family()
+local label_size = api.dpi(30)
+local border_color = "#ffffffc0"
+local fill_color = "#00000080"
+
+local function start(c)
+   local screen = c.screen
+   local layout = api.layout.get(screen)
+   if c.floating or layout.get_regions == nil then return end
+
+   local infobox = api.wibox({
+         x = screen.workarea.x,
+         y = screen.workarea.y,
+         width = screen.workarea.width,
+         height = screen.workarea.height,
+         bg = "#ffffff00",
+         opacity = 1,
+         ontop = true
+   })
+   infobox.visible = true
+
+   local function draw_info(context, cr, width, height)
+      cr:set_source_rgba(0, 0, 0, 0)
+      cr:rectangle(0, 0, width, height)
+      cr:fill()
+
+      local msg, ext
+      local regions = layout.get_regions()
+      for i, a in ipairs(regions) do
+         cr:rectangle(a.x, a.y, a.width, a.height)
+         cr:clip()
+         cr:set_source(api.gears.color(fill_color))
+         cr:rectangle(a.x, a.y, a.width, a.height)
+         cr:fill()
+         cr:set_source(api.gears.color(border_color))
+         cr:rectangle(a.x, a.y, a.width, a.height)
+         cr:set_line_width(10.0)
+         cr:stroke()
+         cr:reset_clip()
+
+         cr:select_font_face(label_font_family, "normal", "normal")
+         cr:set_font_size(label_size)
+         cr:set_font_face(cr:get_font_face())
+         msg = tostring(i)
+         ext = cr:text_extents(msg)
+         cr:move_to(a.x + a.width / 2 - ext.width / 2 - ext.x_bearing, a.y + a.height / 2 - ext.height / 2 - ext.y_bearing)
+         cr:text_path(msg)
+         cr:set_source_rgba(1, 1, 1, 1)
+         cr:fill()
+         
+      end
+   end
+
+   infobox.bgimage = draw_info
+
+   local kg
+   kg = keygrabber.run(
+      function (mod, key, event)
+         if event == "release" then return end
+
+         if key == "Escape" then
+            infobox.visible = false
+            kg.stop()
+         end
+      end
+   )
+end
+
+return {
+   start = start,
+}