Guard the chgat() check (chgat() needs wchgat()) and stop assuming a
subpad shares the parent pad's cells (implementation-defined in X/Open).
(cherry picked from commit 64fab74bd7)
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Add curses tests for panels, textpad, and window behavior
Extend test_curses with behavior-verifying tests that go beyond the
existing smoke tests:
* curses.panel stacking: new_panel/top/bottom/above/below ordering,
hide/show/hidden, move, replace and userptr round-trip.
* Real-window curses.textpad.Textbox: gather(), edit(), stripspaces,
insert mode and the Emacs-like editing commands (previously only
exercised through a MagicMock).
* Window output: addstr cursor advance and addnstr truncation,
insstr/insnstr shifting without cursor movement, and pad behavior
(instr, subpad cell sharing, the required 6-argument refresh()).
* Error handling: out-of-range coordinates raising curses.error and
bad character/string argument types.
(cherry picked from commit b4cfb992ed)
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
The X/Open curses specification[0] and ncurses documentation[1]
both state that subwindows must be deleted before the main window.
Deleting the windows in the wrong order causes a double-free with
NetBSD's curses implementation.
To fix this, keep track of the original window object in the subwindow
object, and keep a reference to the original for the lifetime of
the subwindow.
[0] https://pubs.opengroup.org/onlinepubs/7908799/xcurses/delwin.html
[1] https://invisible-island.net/ncurses/man/curs_window.3x.html
(cherry picked from commit 0af61fe2f4)
Co-authored-by: Michael Forney <mforney@mforney.org>
gh-91221: fix `test_curses.test_use_default_colors` for xterm-256color (GH-132990)
Terminals with `xterm-256color` Xterm support may use 15 (bright white) as their default foreground color.
(cherry picked from commit 7f02ded29f)
Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>
gh-120378: Fix crash caused by integer overflow in `curses` (GH-124555)
This is actually an upstream problem in curses, and has been reported
to them already:
https://lists.gnu.org/archive/html/bug-ncurses/2024-09/msg00101.html
This is a nice workaround in the meantime to prevent the segfault.
(cherry picked from commit c2ba931318)
Co-authored-by: Peter Bierma <zintensitydev@gmail.com>
Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>
curses.update_lines_cols() is only defined when the curses library
provides either resizeterm() or resize_term() functions which are optional
and are not provided on AIX.
If __stdout__ is not attached to terminal, try to use __stderr__
if it is attached to terminal, or open the terminal device, or
use regular file as terminal, but some functions will be untested
in the latter case.
test_curses now saves/restores signals. On FreeBSD, the curses module
sets handlers of some signals, but don't restore old handlers when
the module is deinitialized.
Based on patch by Victor Stinner.
Add private C API function _PyUnicode_AsUnicode() which is similar to
PyUnicode_AsUnicode(), but checks for null characters.
