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Prevent windows from being moved off-screen

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Ry 2022-10-05 17:18:14 -07:00
parent 4f1ae864aa
commit 9512c40747
1 changed files with 34 additions and 1 deletions
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35
kernel/window/window.asm
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@ -198,9 +198,36 @@ start_dragging_window_loop:
; r1: Y position ; r1: Y position
; r2: pointer to window struct ; r2: pointer to window struct
move_window: move_window:
push r0
push r1
push r2 push r2
push r3
push r4
push r5
push r6
add r2, 20 ; prevent windows from being moved off-screen
add r2, 16
movz.16 r3, [r2]
add r2, 2
movz.16 r4, [r2]
mov r5, 640
mov r6, 480
sub r5, r3
sub r6, r4
cmp r0, 0x80000000
ifgt mov r0, 0
cmp r1, 0x80000000
ifgt mov r1, 0
cmp r0, r5
ifgt mov r0, r5
cmp r1, r6
ifgt mov r1, r6
; move the window
add r2, 2
mov.16 [r2], r0 mov.16 [r2], r0
add r2, 2 add r2, 2
mov.16 [r2], r1 mov.16 [r2], r1
@ -208,7 +235,13 @@ move_window:
movz.8 r2, [r2] movz.8 r2, [r2]
call move_overlay call move_overlay
pop r6
pop r5
pop r4
pop r3
pop r2 pop r2
pop r1
pop r0
ret ret
; fill a whole window with a color ; fill a whole window with a color