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shell: Redraw the line when needed

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Ry 2022-11-25 17:20:57 -08:00
parent 7f6eeb10c7
commit c321e54cfb
1 changed files with 17 additions and 1 deletions
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18
kernel/shell/shell.asm
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@ -1,6 +1,7 @@
; shell routines
const CURSOR: 0x8A
const REDRAW_LINE: 0xFE
; create a new shell task
; inputs:
@ -120,9 +121,16 @@ shell_task_parse_key:
call print_character_to_terminal
call shell_push_character
; finally, print the cursor
; then, print the cursor
mov r0, CURSOR
call print_character_to_terminal
; finally, redraw the line
; print character 3 times in order to execute the control character once (see terminal's text.asm for details)
mov r0, REDRAW_LINE
call print_character_to_terminal
call print_character_to_terminal
call print_character_to_terminal
ret
shell_key_down_enter:
; clear the cursor from the screen
@ -160,6 +168,10 @@ shell_key_down_backspace:
mov r0, CURSOR ; cursor
call print_character_to_terminal
call shell_delete_character
mov r0, REDRAW_LINE
call print_character_to_terminal
call print_character_to_terminal
call print_character_to_terminal
ret
shell_print_prompt:
@ -168,6 +180,10 @@ shell_print_prompt:
call print_character_to_terminal
mov r0, shell_prompt
call print_str_to_terminal
mov r0, REDRAW_LINE
call print_character_to_terminal
call print_character_to_terminal
call print_character_to_terminal
ret
shell_parse_line: