tab switcher kitten

[tg0h]

summary

tab.switcher.demo.mp4

This is just a follow up to my previous post where I created a wiki tab switcher

This tab switcher kitten toggles (creates/activates or goes back to previous tab) a tab with your specified

• title
• current directory
• colour
• command
• command args

eg, in my kitty.conf, I can switch to my dotfiles tab which goes to my dotfiles directory and opens the latest changed file. the tab is coloured in cyan.
You can also specify any arbitrary command, eg, I have a chatgpt tab which runs aichat

sample usage

# kitty.conf
map cmd+. kitten tab_switcher.py dotfiles /Users/tim/dotfiles cyan nvim -c 'lua open_latest_changed_file()'
map cmd+a kitten tab_switcher.py ai /Users/tim/dotfiles red zsh -c aichat

kitten

# tab_switcher.py
from typing import List
from kitty.boss import Boss
from kittens.tui.loop import debug
from kittens.tui.handler import result_handler
from kitty.rgb import to_color

def main(args: List[str]):
    pass

def redraw_tab_bar(boss):
    tm = boss.active_tab_manager
    if tm is not None:
        tm.mark_tab_bar_dirty()   

@result_handler(no_ui=True)
def handle_result(args: List[str], answer: str, target_window_id: int, boss: Boss) -> None:
    # print(f'args is {args}')
    title=args[1]
    cwd=args[2]
    tabColour=args[3]
    exe=args[4]
    exe_args= args[5::] # slice the args into a new list
    print(f'exe_arg_list is{exe_args}')

    tab = get_tab(boss, title)

    if tab: # if tab exists
        if boss.active_tab.title == title: # if tab is active
            boss.goto_tab(0) # go to previous active tab
        else:
            boss.set_active_tab(tab)
    else: # create a new tab
        boss.launch(
        "--type=tab",
        f"--title={title}",
        f"--cwd={cwd}",
        exe,
        *exe_args # unpack the list (splat them)
        )
        tab = get_tab(boss, title)
        colour_tab(boss, tab, tabColour)

def get_tab(boss: Boss, title):
    tabs = boss.match_tabs(f'title:^{title}')
    tab = next(tabs, None) # default value for generator to None instead of throwing StopIteration error
    return tab

def colour_tab(boss: Boss, tab, tabColour) -> None:
    colour = int(to_color(tabColour, validate=True))
    # tab.active_fg = colourBlack
    # tab.inactive_fg = colourPink
    tab.active_bg = colour
    tab.inactive_fg = colour
    redraw_tab_bar(boss)

---

extras

This is a lua script you can use in neovim to open the latest changed file in your current directory (assumes you have fd and gsed)

function open_latest_changed_file()
  -- https://www.reddit.com/r/neovim/comments/y2by27/is_there_a_way_to_run_terminal_commands_with_lua/
  -- for some reason, the filenames end with a null character (which shows up as ^@ in neovim)
  -- use gsed to remove this trailing null byte
  -- local cmd = [[ fd --follow --hidden --type f --exec-batch ls -lt | choose 8 | head -n1 | gsed 's/.$//' ]]
  -- ls -lt adds a linefeed char
  -- use hexdump or hexyl
  -- hexdump shows 61 0a or a followed by linefeed
  -- ttps://www.ibm.com/docs/en/aix/7.2?topic=adapters-ascii-decimal-hexadecimal-octal-binary-conversion-table
  -- 0x0a is 10 is linefeed is '\n'

  local cmd = [[ fd --follow --hidden --type f --exec-batch ls -lt | choose 8 | head -n1 | tr -d '\n' ]]
  local handle = io.popen(cmd)
  -- The argument '*a' passed to the read function means it will read the entire output of the process. The '*a' pattern stands for "all," indicating that the function should read everything until the end of the file (in this case, the end of the output stream from the process).
  local latestEditedFile = handle:read('*a')

  -- print('read is ' .. (latestEditedFile or ''))

  if latestEditedFile then
    local buf_id = vim.fn.bufnr(latestEditedFile, true)
    open_buf(buf_id)
  end
end