Create a shortcut to set the tab title

No longer need to use remote control just to change tab titles.

README.asciidoc

@@ -39,6 +39,7 @@
 :sc_scroll_page_down: pass:quotes[`ctrl+shift+page_down`]
 :sc_scroll_page_up: pass:quotes[`ctrl+shift+page_up`]
 :sc_second_window: pass:quotes[`ctrl+shift+2`]
+:sc_set_tab_title: pass:quotes[`ctrl+shift+alt+t`]
 :sc_seventh_window: pass:quotes[`ctrl+shift+7`]
 :sc_show_scrollback: pass:quotes[`ctrl+shift+h`]
 :sc_sixth_window: pass:quotes[`ctrl+shift+6`]
@@ -202,6 +203,7 @@ windows are:
 |Next layout | {sc_next_layout}
 |Move tab forward | {sc_move_tab_forward}
 |Move tab backward | {sc_move_tab_backward}
+|Set tab title | {sc_set_tab_title}
 
 |===
 

kittens/ask/main.py

@@ -6,7 +6,6 @@ import json
 import os
 import readline
 import sys
-from gettext import gettext as _
 
 from kitty.cli import parse_args
 from kitty.constants import cache_dir
@@ -87,7 +86,7 @@ def real_main(args):
     try:
         args, items = parse_args(args[1:], option_text, '', msg, 'kitty ask')
     except SystemExit as e:
-        print(e.args[0], file=sys.stderr)
+        print(e.args[0])
         input('Press enter to quit...')
         raise SystemExit(1)
 
@@ -95,11 +94,9 @@ def real_main(args):
 
     with alternate_screen(), HistoryCompleter(args.name):
         if args.message:
-            print(styled(args.message), bold=True)
+            print(styled(args.message, bold=True))
 
-        prompt = ': '
-        if args.type == 'line':
-            prompt = _('Enter line: ')
+        prompt = '> '
         try:
             ans = input(prompt)
         except (KeyboardInterrupt, EOFError):
@@ -110,8 +107,8 @@ def real_main(args):
 def main(args=sys.argv):
     try:
         real_main(args)
-    except Exception:
+    except Exception as e:
         import traceback
-        traceback.print_exc()
+        traceback.print_exc(file=sys.stdout)
         input('Press enter to quit...')
         raise SystemExit(1)

kitty/boss.py

@@ -3,6 +3,7 @@
 # License: GPL v3 Copyright: 2016, Kovid Goyal <kovid at kovidgoyal.net>
 
 import atexit
+import json
 import re
 import socket
 from functools import partial
@@ -204,7 +205,6 @@ class Boss:
         return response
 
     def peer_message_received(self, msg):
-        import json
         msg = msg.decode('utf-8')
         cmd_prefix = '\x1bP@kitty-cmd'
         if msg.startswith(cmd_prefix):
@@ -435,10 +435,17 @@ class Boss:
                     overlay_for=w.id))
             overlay_window.action_on_close = partial(self.send_unicode_character, w.id)
 
+    def get_output(self, source_window, num_lines=1):
+        output = ''
+        s = source_window.screen
+        for i in range(min(num_lines, s.lines)):
+            output += str(s.linebuf.line(i))
+        return output
+
     def send_unicode_character(self, target_window_id, source_window):
         w = self.window_id_map.get(target_window_id)
         if w is not None:
-            output = str(source_window.screen.linebuf.line(0))
+            output = self.get_output(source_window)
             if output.startswith('OK: '):
                 try:
                     text = chr(int(output.partition(' ')[2], 16))
@@ -448,6 +455,28 @@ class Boss:
                 else:
                     w.paste(text)
 
+    def set_tab_title(self):
+        w = self.active_window
+        tab = self.active_tab
+        if w is not None and tab is not None and w.overlay_for is None:
+            args = ['--name=tab-title', '--message', _('Enter the new title for this tab below.')]
+            overlay_window = tab.new_special_window(
+                SpecialWindow(
+                    ['kitty', '+runpy', 'from kittens.ask.main import main; main()'] + args,
+                    overlay_for=w.id))
+            overlay_window.action_on_close = partial(self.do_set_tab_title, tab.id)
+
+    def do_set_tab_title(self, tab_id, source_window):
+        output = self.get_output(source_window)
+        if output.startswith('OK: '):
+            title = json.loads(output.partition(' ')[2].strip())
+            tm = self.active_tab_manager
+            if tm is not None and title:
+                for tab in tm.tabs:
+                    if tab.id == tab_id:
+                        tab.set_title(title)
+                        break
+
     def run_simple_kitten(self, type_of_input, kitten, *args):
         import shlex
         w = self.active_window

kitty/kitty.conf

@@ -392,6 +392,7 @@ map ctrl+shift+q        close_tab
 map ctrl+shift+l        next_layout
 map ctrl+shift+.        move_tab_forward
 map ctrl+shift+,        move_tab_backward
+map ctrl+shift+alt+t    set_tab_title
 # You can also create shortcuts to go to specific tabs, with 1 being the first tab
 # map ctrl+alt+1          goto_tab 1
 # map ctrl+alt+2          goto_tab 2