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feat(vt): add support for DECST8C escape sequence

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Recognize CSI ? 5 W as DECST8C, which resets the active screen's tab
stops to the default of every 8 columns. Other CSI W variants continue
to produce a parse error.

Signed-off-by: Ayman Bagabas <aymanbagabas@gmail.com>
This commit is contained in:
Ayman Bagabas
2026-05-26 07:54:24 -04:00
committed by Ayman Bagabas
parent 3138ae4aad
commit c68a1654d3
5 changed files with 34 additions and 0 deletions
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16
kitty_tests/screen.py
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@@ -530,6 +530,22 @@ class TestScreen(BaseTest):
s = self.create_screen(cols=4, lines=2)
s.draw('aaaX\tbbbb')
self.ae(str(s.line(0)) + str(s.line(1)), 'aaaXbbbb')
# DECST8C: reset tab stops to every 8 columns
s = self.create_screen(cols=20, lines=2)
s.clear_tab_stop(3)
s.reset_tab_stops()
s.cursor_position(1, 1)
s.tab()
self.ae(s.cursor.x, 8)
s.tab()
self.ae(s.cursor.x, 16)
# Verify the DECST8C escape sequence
s = self.create_screen(cols=20, lines=2)
s.clear_tab_stop(3)
parse_bytes(s, b'\x1b[?5W')
s.cursor_position(1, 1)
s.tab()
self.ae(s.cursor.x, 8)
# Custom tab stops survive a window resize
s = self.create_screen(cols=20, lines=2)