terminal: Create module to consolidate term utils

Terminal application, a variety of shell configurations, terminal file
and session management all consolidated in one place.

terminal/.config/wezterm/events.lua

@@ -0,0 +1,77 @@
+local wezterm = require 'wezterm'
+local io = require 'io'
+local os = require 'os'
+local act = wezterm.action
+
+local function setup()
+    local function isViProcess(pane)
+        local proc = pane:get_foreground_process_name()
+        if (proc:find('vim') or proc:find('nvim')) then return true end
+        return false
+    end
+
+    local function conditionalActivatePane(window, pane, pane_direction,
+                                           vim_direction)
+        if (isViProcess(pane)) then
+            window:perform_action(act.Multiple {
+                act.SendKey { key = 'w', mods = 'CTRL' },
+                act.SendKey { key = vim_direction }
+            }, pane)
+        else
+            window:perform_action(act.ActivatePaneDirection(pane_direction),
+                pane)
+        end
+    end
+
+    wezterm.on('ActivatePaneDirection-right', function(window, pane)
+        conditionalActivatePane(window, pane, 'Right', 'l')
+    end)
+    wezterm.on('ActivatePaneDirection-left', function(window, pane)
+        conditionalActivatePane(window, pane, 'Left', 'h')
+    end)
+    wezterm.on('ActivatePaneDirection-up', function(window, pane)
+        conditionalActivatePane(window, pane, 'Up', 'k')
+    end)
+    wezterm.on('ActivatePaneDirection-down', function(window, pane)
+        conditionalActivatePane(window, pane, 'Down', 'j')
+    end)
+
+    -- Retrieve the current scrollback text and send to editor
+    wezterm.on('edit-scrollback', function(window, pane)
+        local viewport_text = pane:get_lines_as_text(10000)
+
+        -- Create a temporary file to pass to vim
+        local name = os.tmpname()
+
+        local f = io.open(name, 'w+')
+        if f == nil then return false end
+        f:write(viewport_text)
+        f:flush()
+        f:close()
+
+        -- Open a new window running vim and tell it to open the file
+        window:perform_action(act.SpawnCommandInNewTab {
+            args = { (os.getenv('EDITOR') or 'vi'), name }
+        }, pane)
+
+        -- Wait time for vim to read the file before we remove it.
+        wezterm.sleep_ms(1000)
+        os.remove(name)
+    end)
+
+    wezterm.on("toggle-leader", function(window, pane)
+        wezterm.log_info("toggling the leader")
+        local overrides = window:get_config_overrides() or {}
+        if not overrides.leader then
+            wezterm.log_info("leader wasn't set")
+            overrides.leader = { key = "s", mods = "SUPER" };
+        else
+            wezterm.log_info("leader was set")
+            overrides.leader = nil
+        end
+
+        window:set_config_overrides(overrides)
+    end)
+end
+
+return { setup = setup }