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fix(cocoa): the Delete key reports Key.Backspace (8)

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AppKit gives kVK_Delete (51) the character NSDeleteCharacter, 127, which is
what both ev_keyval (the held-key set) and win_poll (the per-frame key)
received, so Key.Backspace, which folds to 8, never matched. Both now map key
code 51 to 8.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-09-13 03:00:29 +03:00
parent 09247c57cf
commit 885943e73f
2 changed files with 13 additions and 0 deletions
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7
changes/backspace-key.md Normal file
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@ -0,0 +1,7 @@
bump: patch
type: fix
**Backspace fires on macOS** — the Delete key reports `Key.Backspace` (8).
AppKit gives the key marked delete (kVK_Delete, 51) the character `NSDeleteCharacter`, 127,
which is what both the held-key set and the per-frame key received, so `Key.Backspace` never
matched. `cocoa.ll` maps key code 51 to 8 in both.

6
runtime/native/cocoa.ll
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@ -346,6 +346,7 @@ entry:
i32 49, label %vspace i32 49, label %vspace
i32 36, label %vret i32 36, label %vret
i32 53, label %vesc i32 53, label %vesc
i32 51, label %vbksp
] ]
vw: ret i32 128 vw: ret i32 128
vs: ret i32 129 vs: ret i32 129
@ -354,6 +355,9 @@ vd: ret i32 131
vspace: ret i32 32 vspace: ret i32 32
vret: ret i32 10 vret: ret i32 10
vesc: ret i32 27 vesc: ret i32 27
; kVK_Delete (51), the key marked delete or backspace: AppKit reports its character as
; NSDeleteCharacter (127), and Key.Backspace is 8
vbksp: ret i32 8
chars: chars:
%sel_ch = call ptr @sel_registerName(ptr @.s_chars) %sel_ch = call ptr @sel_registerName(ptr @.s_chars)
%sel_len = call ptr @sel_registerName(ptr @.s_length) %sel_len = call ptr @sel_registerName(ptr @.s_length)
@ -493,6 +497,7 @@ key:
i32 49, label %k_space i32 49, label %k_space
i32 36, label %k_ret i32 36, label %k_ret
i32 53, label %k_esc i32 53, label %k_esc
i32 51, label %k_bksp
] ]
k_w: store i32 119, ptr @W_key br label %forward k_w: store i32 119, ptr @W_key br label %forward
k_s: store i32 115, ptr @W_key br label %forward k_s: store i32 115, ptr @W_key br label %forward
@ -500,6 +505,7 @@ k_a: store i32 97, ptr @W_key br label %forward
k_d: store i32 100, ptr @W_key br label %forward k_d: store i32 100, ptr @W_key br label %forward
k_space: store i32 32, ptr @W_key br label %forward k_space: store i32 32, ptr @W_key br label %forward
k_ret: store i32 10, ptr @W_key br label %forward k_ret: store i32 10, ptr @W_key br label %forward
k_bksp: store i32 8, ptr @W_key br label %forward
k_esc: k_esc:
; Escape is delivered as key 27 and left to the game (pause menus etc.). ; Escape is delivered as key 27 and left to the game (pause menus etc.).
; It used to force-quit the window, which a shipped game cannot tolerate. ; It used to force-quit the window, which a shipped game cannot tolerate.