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GeezerVison is showing github.com — [3.14] gh-152502: Detect the curses mouse interface portably (GH-152705) by serhiy-storchaka · Pull Request #152734 · python/cpython

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@serhiy-storchaka

@serhiy-storchaka serhiy-storchaka commented Jul 1, 2026

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The mouse interface (getmouse(), the BUTTON* constants, ...) was gated on the ncurses-specific NCURSES_MOUSE_VERSION macro, so it was dropped on other curses implementations that provide it, such as NetBSD curses and PDCurses (the latter underpins windows-curses).

It is now gated on a configure capability probe or the PDCURSES macro. getmouse() is probed with its X/Open getmouse(MEVENT *) signature specifically, because PDCurses declares an incompatible getmouse(void) unless built for the ncurses mouse API; PDC_NCMOUSE is now always defined so PDCurses selects that interface.

The is_*() state-query methods named in the original change (GH-152705) do not exist on 3.14, so only the mouse interface is backported.

Verified by reconfiguring + rebuilding on 3.14 (the probe resolves HAVE_CURSES_GETMOUSE=1) and running test_curses.

  • Issue: curses: detect optional functions with configure probes instead of assuming ncurses #152502

(cherry picked from commit 7bbea4f)

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@serhiy-storchaka @claude
[3.14] pythongh-152502: Detect the curses mouse interface portably (p…
34ab854 
…ythonGH-152705)

The mouse interface (getmouse(), the BUTTON* constants, ...) was gated on the
ncurses-specific NCURSES_MOUSE_VERSION macro, so it was dropped on other curses
implementations that provide it, such as NetBSD curses and PDCurses.

Gate it instead on a configure capability probe or the PDCURSES macro.  Probe
for getmouse() with its X/Open getmouse(MEVENT *) signature, since PDCurses
declares an incompatible getmouse(void) unless built for the ncurses mouse API,
which PDC_NCMOUSE now always selects.

The is_*() state-query methods named in the original change do not exist on 3.15,
so only the mouse interface is backported.

(cherry picked from commit 7bbea4f)

Co-Authored-By: Claude Opus 4.8 <[email protected]>
@serhiy-storchaka
serhiy-storchaka requested review from corona10 and erlend-aasland as code owners July 1, 2026 05:06
@bedevere-app bedevere-app Bot mentioned this pull request Jul 1, 2026
curses: detect optional functions with configure probes instead of assuming ncurses #152502
Closed
@bedevere-app bedevere-app Bot added the awaiting core review label Jul 1, 2026
@bedevere-app bedevere-app Bot mentioned this pull request Jul 1, 2026
gh-152502: Detect the curses mouse interface and is_* methods portably #152705
Merged
@serhiy-storchaka
serhiy-storchaka enabled auto-merge (squash) July 1, 2026 05:15
@serhiy-storchaka
serhiy-storchaka merged commit 51cacbe into python:3.14 Jul 1, 2026
49 of 52 checks passed

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@bedevere-app bedevere-app Bot removed the awaiting core review label Jul 1, 2026
@serhiy-storchaka
serhiy-storchaka deleted the backport-152705-3.14 branch July 1, 2026 16:46
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@erlend-aasland erlend-aasland Awaiting requested review from erlend-aasland erlend-aasland is a code owner
@corona10 corona10 Awaiting requested review from corona10 corona10 is a code owner

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@serhiy-storchaka
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