begin astal rewrite in lua; implement workspace widget in statusbar

lua/widgets/bar/init.lua

@@ -0,0 +1,9 @@
+local workspaces <const> = require(... .. '.workspaces')
+
+return Astal.Window({
+  namespace = "bar",
+  name = "bar",
+  anchor = Astal.WindowAnchor.TOP + Astal.WindowAnchor.LEFT + Astal.WindowAnchor.RIGHT,
+  exclusivity = "EXCLUSIVE",
+  child = workspaces,
+})

lua/widgets/bar/workspaces.lua

@@ -0,0 +1,48 @@
+local Hyprland <const> = astal.require("AstalHyprland")
+local map, sequence = require('lua.lib').map, require('lua.lib').sequence
+
+local hypr = Hyprland.get_default()
+
+local map, sequence = require('lua.lib').map, require('lua.lib').sequence
+
+local hypr = Hyprland.get_default()
+
+local function workspace_row(start, stop)
+  return Widget.Box({
+    children = map(sequence(start, stop), function(i)
+      return Widget.Button({
+        setup = function(self)
+          self:hook(hypr, 'notify::focused-workspace', function(self, workspace)
+            self:toggle_class_name('focused', workspace:get_id() == i)
+          end)
+          self:hook(hypr, 'notify::workspaces', function(self, workspaces)
+            map(workspaces, function(workspace)
+              if workspace:get_id() == i then
+                -- ick 
+                local count = 0
+                for _ in ipairs(workspace:get_clients()) do
+                  count = count + 1
+                end
+                self:toggle_class_name('occupied', workspace:get_id() == i and count > 0)
+              end
+            end)
+          end)
+        end,
+        on_click_release = function()
+          hypr:message_async(string.format("dispatch workspace %d", i))
+        end
+      })
+    end)
+  })
+end
+
+return Widget.Box({
+  class_name = 'workspaces',
+  vertical = true,
+  hexpand = false,
+  halign = 'START',
+  children = {
+    workspace_row(1, 5),
+    workspace_row(6, 10),
+  }
+})