Navigation and editing in place in svim works

kernel.nasm

@@ -304,4 +304,4 @@ data:
 times ((1<<20)-($-$$) - 26) db 0 ; sector 258 to sector 2048 should be avaliable to the filesystem.
 magic_string_end_of_SingOS_kernel db '** END OF KERNEL SingOS **'
 
-times ((1<<24)-($-$$)) db 0
+times ((1<<23)-($-$$)) db 0

lib/svim.nasm

@@ -365,31 +365,31 @@ handle_up_key_pressed:
 
 handle_down_key_pressed:
     call get_cursor_position  ; Find the position of the cursor
-    xor cx, cx
-    mov cl, dl                ; Store coulun count
-    push cx                   ; save the column count. 
-    inc cx
+    xor ax, ax
+    mov al, dl                ; Store coulun count
+    push ax                   ; save the column count. 
+    call svim_get_right_line_count ; updates the value in svim_get_cursor_distance_to_next_line_break
+    mov cx, [svim_get_cursor_distance_to_next_line_break] 
 .find_first_line_break:
-    cmp BYTE cl, 0
-    je .end;.find_left_position_on_new_line
+    cmp cx, 0
+    je .find_left_position_on_new_line
     call handle_right_key_pressed
-    dec cl
+    dec cx
     jmp .find_first_line_break
 
-; .find_left_position_on_new_line:
-;     call svim_get_right_line_count ; updates the value in svim_get_cursor_distance_to_next_line_break
-;     mov ax, [svim_get_cursor_distance_to_next_line_break]    
-;     pop cx
-;     cmp cx, ax
-;     jg .move_curser_to_correct_position_on_the_new_line
-;     mov cx, ax
-; .move_curser_to_correct_position_on_the_new_line:
-;     cmp cx, 0
-;     je .end 
-;     call handle_right_key_pressed
-;     dec cx
-;     jmp .move_curser_to_correct_position_on_the_new_line
-
+ .find_left_position_on_new_line:
+     call svim_get_right_line_count ; updates the value in svim_get_cursor_distance_to_next_line_break
+     mov ax, [svim_get_cursor_distance_to_next_line_break]    
+     pop cx
+     cmp cx, ax
+     jle .move_curser_to_correct_position_on_the_new_line
+     mov cx, ax
+ .move_curser_to_correct_position_on_the_new_line:
+     cmp cx, 0
+     je .end 
+     call handle_right_key_pressed
+     dec cx
+     jmp .move_curser_to_correct_position_on_the_new_line
 .end:
     ret
 
@@ -439,7 +439,7 @@ svim_get_right_line_count:
     inc cx ; add one to the counter
     jmp .check_next
 .end_line_break: 
-    ;inc cx ; add one to the counter    
+    inc cx ; add one to the counter    
 .end:
     mov WORD [svim_get_cursor_distance_to_next_line_break], cx
     popa
@@ -500,7 +500,7 @@ svim_counter_char_in_left_buffer dw 0
 svim_counter_char_in_right_buffer dw 0
 seperate_line  db '________________________________________________________________________________', 0
 welcome_svim db 'Vim like text editor for SingOS, ESC to exit', 0
-welcome_svim_select_file db 'svim v0.0.28 - Open file: ', 0
+welcome_svim_select_file db 'svim v0.0.32 - Open file: ', 0
 welcome_svim_enter_fileindex db 'Enter fileindex: ', 0
 fileindex_for_open_file dw 0
 svim_total_file_size_counter dw 0