Improve workspace system into a hashtable

config.rb

@@ -0,0 +1,130 @@
+# ==== State ====
+
+MAX_PROJECTS = 9
+SUBS         = 2   # workspaces per project
+
+$current_project = 1   # 1..MAX_PROJECTS
+$current_sub     = 0   # 0..SUBS-1
+
+# For each special workspace, remembers which workspace you were on
+# before you jumped into it -- so hitting the mode key again toggles back.
+$special_origin = {}
+
+SPECIAL = {
+  terminal: { cmd: "kitty"   },
+  browser:  { cmd: "firefox" },
+  music:    { cmd: "spotify" },
+  misc:     { cmd: nil       },  # doesn't start anything
+  todo:     { cmd: nil       },  # doesn't start anything
+}
+
+# ==== Helpers ====
+
+def project_ws(n, sub)
+  :"p#{n}_#{sub}"
+end
+
+def running?(process)
+  system("pgrep -x #{process} > /dev/null 2>&1")
+end
+
+def go_project(n, sub)
+  $current_project = n
+  $current_sub     = sub
+  jump_ws project_ws(n, sub)
+end
+
+def in_project?(ws)
+  !SPECIAL.key?(ws)
+end
+
+# Toggle between a special-mode workspace (terminal/browser/music/misc/todo)
+# and whatever workspace you were last on. Starts the associated app if
+# it isn't already running. `ws` is the current workspace, passed in by
+# the bind block (bind gives us (window, current_ws)).
+def go_special(name, ws)
+  cfg = SPECIAL.fetch(name)
+
+  if ws == name
+    target = $special_origin[name] || project_ws($current_project, $current_sub)
+    jump_ws target
+  else
+    $special_origin[name] = ws
+    jump_ws name
+    system("#{cfg[:cmd]} >/dev/null 2>&1 &") if cfg[:cmd] && !running?(cfg[:cmd])
+  end
+end
+
+# ==== Untouched bindings ====
+
+bind ?q do |x|
+  kill x
+end
+
+bind ?w do
+  system "kitty >/dev/null 2>&1 &"
+end
+
+bind ?e do
+  exit
+end
+
+bind ?f do |x|
+  toggle_float x
+end
+
+# ==== Mode switches ====
+
+bind ?[ do |_, ws|
+  go_special :terminal, ws
+end
+
+bind ?] do |_, ws|
+  go_special :misc, ws
+end
+
+bind "tab" do |_, ws|
+  go_special :browser, ws
+end
+
+bind 89 do |_, ws|
+  go_special :music, ws
+end
+
+bind 81 do |_, ws|
+  go_special :todo, ws
+end
+
+# ==== Project navigation ====
+
+(1..MAX_PROJECTS).each do |n|
+  bind n.to_s do
+    go_project(n, $current_sub)
+  end
+end
+
+bind 86 do |_, ws|
+  next unless in_project?(ws)
+  n = (($current_project - 2) % MAX_PROJECTS) + 1
+  go_project(n, $current_sub)
+end
+
+bind 82 do |_, ws|
+  next unless in_project?(ws)
+  n = ($current_project % MAX_PROJECTS) + 1
+  go_project(n, $current_sub)
+end
+
+bind 79 do |_, ws|
+  next unless in_project?(ws)
+  go_project($current_project, ($current_sub + 1) % SUBS)
+end
+
+bind 80 do |_, ws|
+  next unless in_project?(ws)
+  go_project($current_project, ($current_sub - 1 + SUBS) % SUBS)
+end
+
+# ==== Startup ====
+
+go_project(1, 0)