fox32os/kernel/window/event_manager_task.asm
Ry df9e7eb311 Fetcher: Initial commit
This commit includes needed kernel changes and additions.
2023-07-12 00:00:08 -07:00

175 lines
4.7 KiB
NASM

; task that manages window events
; start a task which handles passing system events into the correct window event queue
; inputs:
; none
; outputs:
; none
start_event_manager_task:
; allocate 256 bytes for the stack
mov r0, 256
call allocate_memory
add r0, 256 ; add 256 so the stach pointer is at the end of the stack block (stack grows down)
mov r10, r0
; then start the task
call get_unused_task_id
mov r1, event_manager_task_loop ; initial instruction pointer
mov r2, r10 ; initial stack pointer
mov r3, 0 ; pointer to task code block to free when task ends
; (zero since we don't want to free any code blocks when the task ends)
mov r4, r10 ; pointer to task stack block to free when task ends
sub r4, 256 ; point to the start of the stack block that we allocated above
call new_task
ret
event_manager_task_loop:
call get_next_event
; mouse
cmp r0, EVENT_TYPE_MOUSE_CLICK
ifz call event_manager_task_mouse_event
cmp r0, EVENT_TYPE_MOUSE_RELEASE
ifz call event_manager_task_mouse_event
cmp.8 [active_window_offset], 0xFF
ifz rjmp event_manager_task_loop_end
; menu bar
cmp r0, EVENT_TYPE_MENU_BAR_CLICK
ifz call add_event_to_active_window
cmp r0, EVENT_TYPE_MENU_CLICK
ifz call add_event_to_active_window
cmp r0, EVENT_TYPE_MENU_ACK
ifz call add_event_to_active_window
cmp r0, EVENT_TYPE_MENU_UPDATE
ifz call add_event_to_active_window
; keyboard
cmp r0, EVENT_TYPE_KEY_DOWN
ifz call add_event_to_active_window
cmp r0, EVENT_TYPE_KEY_UP
ifz call add_event_to_active_window
event_manager_task_loop_end:
call yield_task
rjmp event_manager_task_loop
event_manager_task_mouse_event:
push r0
push r1
push r2
; if a menu is open, don't continue
; this is hacky as fuck
push r0
in r0, 0x8000031D ; overlay 29: enable status
cmp r0, 0
ifnz pop r0
ifnz pop r2
ifnz pop r1
ifnz pop r0
ifnz ret
pop r0
; find which overlay was clicked on
mov r0, r1
mov r1, r2
call find_overlay_convering_position
cmp r0, 0xFFFFFFFF
ifz pop r2
ifz pop r1
ifz pop r0
ifz ret
push r0
; get the overlay number of the active window
movz.8 r0, [active_window_offset]
cmp.8 r0, 0xFF
ifz pop r1
ifz jmp event_manager_task_mouse_event_inactive_window_was_clicked
call window_list_offset_to_struct
call get_window_overlay_number
; check if the click was inside the active window
; otherwise, activate the clicked window
pop r1
cmp r0, r1
ifnz jmp event_manager_task_mouse_event_inactive_window_was_clicked
pop r2
pop r1
pop r0
call add_mouse_event_to_active_window
ret
event_manager_task_mouse_event_inactive_window_was_clicked:
mov r2, r1
mov r1, r0
mov r0, r2
; r0: clicked window overlay number
; r1: currently active window overlay number
; get the window structs of the two windows
call get_window_with_overlay
mov r2, r0
mov r0, r1
call get_window_with_overlay
mov r1, r2
; r0: currently active window struct
; r1: clicked window struct
; give up if a window was not found for the clicked overlay
cmp r1, 0x00000000
ifz pop r2
ifz pop r1
ifz pop r0
ifz ret
; if there is no active window, but we reached this point,
; then assume the click was on an inactive window marked as "always background"
; it's probably bad to assume this, more checks would be good
cmp r0, 0x00000000
ifz jmp event_manager_task_mouse_event_inactive_window_was_clicked_no_change
; swap the two, if the "always background" flag is not set for the clicked window
push r1
add r1, 25
movz.16 r1, [r1]
and r1, WINDOW_FLAG_ALWAYS_BACKGROUND
cmp r1, 0
pop r1
ifnz jmp event_manager_task_mouse_event_inactive_window_was_clicked_no_change
call swap_windows
; mark the clicked window as the active window
mov r0, r1
call search_for_window_list_entry
mov.8 [active_window_offset], r0
; set the menu bar for the newly active window
call window_list_offset_to_struct
call get_window_menu_bar_root_struct
call enable_menu_bar
call clear_menu_bar
mov r1, 0xFFFFFFFF
cmp r0, 0
ifnz call draw_menu_bar_root_items
pop r2
pop r1
pop r0
call add_mouse_event_to_active_window
ret
event_manager_task_mouse_event_inactive_window_was_clicked_no_change:
mov [old_r8], r8
mov r8, r1
pop r2
pop r1
pop r0
call add_mouse_event_to_inactive_window
mov r8, [old_r8]
ret
old_r8: data.32 0