Text Display in Tkinter 01

Usage

tkt file.txt     # display file.txt
tkt f1 f2 f3     # display f1, f2, f3 concatenated
tkt -            # take text from stdin
tkt              # same as tkt -
tkt -c           # display clipboard contents (gets via pp)

The Code

There is a pretty random feature I added for my own purposes: you can pass arguments of the form x=my command arg1 arg2 and instead of seeing this as a file, it sees it as a keybinding, so pressing x will execv('/bin/env',['env','my','command','arg1','arg2']). Note that you can't do anything like quoting in the command passed in here (generally I avoid the need to quote when giving files names). Note that the command will simply quit if env fails to execute the command (this program has no idea whether the command will succeed, and makes no attempt to find out -- a more robust version may use e.g. shutil.which to see if the command exists, and use the result instead of being lazy and throwing the ball to env).

#!/usr/bin/env python
from icecream import ic; ic.configureOutput(includeContext=True)

import re
import os
import tkinter as tk
import tkinter.font as tkfont
import sys
from subprocess import run

stdin = None
txts = []
args = sys.argv[1:]
if len(args) == 0:
  args = ["-"]
kmap = {}
for arg in args:
  if arg == "-":
    if stdin is None:
      stdin = sys.stdin.read()
    txts.append(stdin)
  elif "=" in arg:
    a,b = arg.split("=",1)
    bs = re.split(r"\s+",b.strip())
    kmap[a] = bs
  elif arg == "-c":
    txts.append(run("pp",capture_output=True).stdout.decode())
  else:
    with open(arg) as f:
      txts.append(f.read())

txt = "\n".join(txts)

def key_handler(event):
  print(event.char, event.keysym, event.keycode)
  ic(event)

  if event.char == "q":
    exit()
  match event.char:
    case "q":
      exit()
    case "\x03":
      sel = T.selection_get()
      root.clipboard_clear()
      root.clipboard_append(sel)
      print("Copied:",sel)
      return
  match event.keysym:
    case "Down":
      return T.yview(tk.SCROLL,1,tk.UNITS)
    case "Up":
      return T.yview(tk.SCROLL,-1,tk.UNITS)
    case "Prior":
      return T.yview(tk.SCROLL,-1,tk.PAGES)
    case "Next":
      return T.yview(tk.SCROLL,1,tk.PAGES)
  if event.char in kmap:
    cmd = kmap[event.char]
    os.execv("/bin/env",["env"]+cmd)

root = tk.Tk()
root.bind("<Key>", key_handler)

# get screen size
screen_width = root.winfo_screenwidth()
screen_height = root.winfo_screenheight()
win_width = int(screen_width * 0.7)
win_height = int(screen_height * 0.7)
win_xoffs = int((screen_width-win_width)/2)
win_yoffs = int((screen_height-win_height)/2)
geom = f"{win_width}x{win_height}+{win_xoffs}+{win_yoffs}"

desired_font = tkfont.Font(family="Hack Nerd Font Mono", size=14)

root.geometry(geom)
S = tk.Scrollbar(root)
T = tk.Text(root, height=4, width=50)
T.configure(font = desired_font,bg="#002",fg="#ffc")
S.pack(side=tk.RIGHT, fill=tk.Y)
T.pack(side=tk.LEFT, fill=tk.BOTH, expand=True)
S.config(command=T.yview)
T.config(yscrollcommand=S.set)
T.insert(tk.END, txt)
T.configure(state=tk.DISABLED)
tk.mainloop()