wezterm tmux keybindings

wezterm.lua

local config = {}

config.key_tables = {
  tmux_bindings = {
    { key = "a", mods = "CTRL", action=wezterm.action{SendString="\x01"}},

    { key = "\"", mods = "SHIFT", action=wezterm.action{SplitVertical={domain="CurrentPaneDomain"}}},
    { key = "%",mods = "SHIFT", action=wezterm.action{SplitHorizontal={domain="CurrentPaneDomain"}}},

    { 
      key = "z", 
      action=wezterm.action.Multiple {
        "TogglePaneZoomState",
        "PopKeyTable",
      },
    },
    { key = "x", action=wezterm.action.CloseCurrentPane { confirm = true }, },
    { key = "q", action=wezterm.action{PaneSelect={alphabet = '0123456789'}}},

    { key = 'o', mods = 'CTRL', action = wezterm.action.RotatePanes 'Clockwise' },
    { key = "o", action=wezterm.action{ActivatePaneDirection="Next"}},
    { key = "n", action=wezterm.action{ActivatePaneDirection="Next"}},
    { key = "p", action=wezterm.action{ActivatePaneDirection="Prev"}},

    { key = "RightArrow", action=wezterm.action{ActivatePaneDirection="Right"}},
    { key = "LeftArrow", action=wezterm.action{ActivatePaneDirection="Left"}}, 
    { key = "UpArrow", action=wezterm.action{ActivatePaneDirection="Up"}}, 
    { key = "DownArrow", action=wezterm.action{ActivatePaneDirection="Down"}},

    { key = "RightArrow", mods = "CTRL", action=wezterm.action{AdjustPaneSize={"Right", 2}}},
    { key = "LeftArrow", mods = "CTRL", action=wezterm.action{AdjustPaneSize={"Left", 2}}},
    { key = "UpArrow", mods = "CTRL", action=wezterm.action{AdjustPaneSize={"Up", 2}}},
    { key = "DownArrow", mods = "CTRL", action=wezterm.action{AdjustPaneSize={"Down", 2}}},

    { key = "!", mods = "SHIFT", action=wezterm.action_callback(function(win, pane) local tab, window = pane:move_to_new_window() end)},

    { key = "k", action=wezterm.action.ClearScrollback 'ScrollbackAndViewport'},
    { key = "l", action=wezterm.action.ClearScrollback 'ScrollbackOnly' },
  }
}

config.keys = {
    { 
      key = "a", 
      mods = 'CTRL', 
      action = wezterm.action.ActivateKeyTable { 
        name = 'tmux_bindings', 
        timeout_milliseconds = 500,
        one_shot = false,
      }, 
    }
}

return config

There is also a hacky way to merge panes back into a window, there is a command wezterm cli split-pane --move-pane-id we can use to merge any pane into split of current pane. As far as I can see, this functionality is not exposed via lua.

function find_other_window_panes(window, pane)
  local windows = wezterm.mux.all_windows()
  local panes = {}
  for _, window in ipairs(windows) do
    for _, tab in ipairs(window:tabs()) do
      for _, pane in ipairs(tab:panes()) do
        table.insert(panes, pane)
      end
    end
  end

  local current_tab_panes = {}
  for _, pane in ipairs(window:active_tab():panes()) do
      for i, v in ipairs(panes) do
        if v:pane_id() == pane:pane_id() then
          table.remove(panes, i)
        end
      end
  end

  return panes
end

config.key_tables = {
  tmux_bindings = {
    { key = "d", action=wezterm.action_callback(function(window, pane)
      local choices = {}
      local panes =  find_other_window_panes(window, pane)
      for i,pane in ipairs(panes) do
        table.insert(choices, { id = tostring(i), label = pane:pane_id() .. '/' .. pane:get_title()})
      end

      window:perform_action(wezterm.action.InputSelector {
        action = wezterm.action_callback(function(window, pane, id, label)
          print(panes[1])
          if id and label then
            wezterm.run_child_process { 'wezterm', 'cli', 'split-pane', '--move-pane-id', panes[tonumber(id)]:pane_id(), '--pane-id', pane:pane_id()}
          end
        end),
        title = "select pane",
        choices = choices,
      },
      pane)
    end)},
  }
}

config.keys = {
    { 
      key = "a", 
      mods = 'CTRL', 
      action = wezterm.action.ActivateKeyTable { 
        name = 'tmux_bindings', 
        timeout_milliseconds = 500,
        one_shot = false,
        -- until_unknown = true,
      }, 
    }

}

return config