wezterm: add binding for viewing last output in pager

wezterm/config/events.lua

@@ -1,5 +1,7 @@
 local module = {}
 local wezterm = require("wezterm")
+local io = require("io")
+local os = require("os")
 
 wezterm.on("update-right-status", function(window, pane)
   local key = window:active_key_table()
@@ -9,4 +11,35 @@ wezterm.on("update-right-status", function(window, pane)
   window:set_right_status(key or "")
 end)
 
+wezterm.on("view-last-output-in-new-pane", function(_, pane)
+  local zones = pane:get_semantic_zones("Output")
+  local last_zone = zones[#zones - 1]
+
+  if not last_zone then
+    return nil
+  end
+
+  local output = pane:get_text_from_semantic_zone(last_zone)
+
+  local tmpname = os.tmpname()
+  local f = io.open(tmpname, "w+")
+  if f ~= nil then
+    f:write(output)
+    f:flush()
+    f:close()
+  end
+
+  pane:split {
+    args = { os.getenv("PAGER") or "less", tmpname },
+    direction = "Bottom",
+    domain = { DomainName = "local" },
+  }
+
+  -- Without this, it would quickly close all of the process immediately.
+  wezterm.sleep_ms(1000)
+
+  -- While it isn't required, it is nice to clean it up.
+  os.remove(tmpname)
+end)
+
 return module

wezterm/config/keys.lua

@@ -1,8 +1,10 @@
 local wezterm = require("wezterm")
 local base = require("config/base")
-local events = require("config/events")
 local act = wezterm.action
 
+-- Take note this is required to import the events in this module.
+local _ = require("config/events")
+
 local keymod = base.keymod
 local alt_keymod = base.alt_keymod
 local module = {}
@@ -115,6 +117,7 @@ function module.apply_to_config(config)
     { key = "r", mods = keymod, action = act.ReloadConfiguration },
     { key = "t", mods = keymod, action = act.ShowDebugOverlay },
     { key = "p", mods = keymod, action = act.ActivateCommandPalette },
+    { key = "e", mods = keymod, action = act.EmitEvent "view-last-output-in-new-pane" },
 
     -- Selection
     { key = "Space", mods = "LEADER", action = act.QuickSelect },