Arrow up works in svim, now wokring on arrow down

lib/svim.nasm

@@ -190,7 +190,7 @@ svim:
 .check_down_key:
     cmp ax, 0x50e0 ; down key
     jne .no_arrow_key_pressed
-
+    call handle_down_key_pressed
     jmp .svim_loop    
 .no_arrow_key_pressed:
     cmp ax, 0x11b ; ESC key
@@ -342,8 +342,8 @@ handle_up_key_pressed:
     call get_cursor_position  ; Find the position of the cursor
     xor cx, cx
     mov cl, dl                ; Store coulun count
-    inc cx
     push cx                   ; save the column count. 
+    inc cx
 .find_first_line_break:
     cmp BYTE cl, 0
     je .find_right_position_on_new_line
@@ -353,7 +353,6 @@ handle_up_key_pressed:
 .find_right_position_on_new_line:
     call svim_get_left_line_count ; updates the value in svim_get_cursor_distance_to_next_line_break
     mov ax, [svim_get_cursor_distance_to_next_line_break]    
-    call dumpax
     pop cx
 .move_curser_to_correct_position_on_the_new_line:
     cmp cx, ax
@@ -364,18 +363,34 @@ handle_up_key_pressed:
 .end:
     ret
 
-
 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
+.find_first_line_break:
+    cmp BYTE cl, 0
+    je .end;.find_left_position_on_new_line
+    call handle_right_key_pressed
+    dec cl
+    jmp .find_first_line_break
 
-    ret
-
+; .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
 
-get_cursor_position:
-    xor ax, ax
-    xor bx, bx
-    mov ah, 0x03
-    mov bh, 0x00 ; page number 0 
-    int 0x10
+.end:
     ret
 
 svim_get_left_line_count: 
@@ -383,12 +398,40 @@ svim_get_left_line_count:
     xor ax, ax ; Number of chars in the right side buffer
     xor cx, cx ; This is our counter to the next line break
     mov ax, [svim_counter_char_in_left_buffer]
-    mov bx, buffer_for_svim_base_left_of_cursor
+    mov bx, [buffer_for_svim_base_left_of_cursor]
     add bx, ax
+    dec bx
 .check_next:
     cmp ax, 0 ; check if we have hit the absolut beginnig of the string
     je .end
     mov BYTE dl, [bx]
+    
+    cmp BYTE dl, 10 ; See if we have hit an linebreak
+    je .end_line_break 
+    dec bx ; dec one, to check the prev char, until we hit a line break. 
+    dec ax  
+    inc cx ; add one to the counter
+    jmp .check_next
+.end_line_break: 
+    ;inc cx ; add one to the counter    
+.end:
+    mov WORD [svim_get_cursor_distance_to_next_line_break], cx
+    popa
+    ret
+
+svim_get_right_line_count: 
+    pusha
+    xor ax, ax ; Number of chars in the right side buffer
+    xor cx, cx ; This is our counter to the next line break
+    mov ax, [svim_counter_char_in_right_buffer]
+    mov bx, [buffer_for_svim_base_right_of_cursor]
+    add bx, ax
+    dec bx
+.check_next:
+    cmp ax, 0 ; check if we have hit the absolut beginnig of the string
+    je .end
+    mov BYTE dl, [bx]
+    
     cmp BYTE dl, 13 ; See if we have hit an linebreak
     je .end_line_break 
     dec bx ; dec one, to check the prev char, until we hit a line break. 
@@ -396,12 +439,20 @@ svim_get_left_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
     ret
 
+get_cursor_position:
+    xor ax, ax
+    xor bx, bx
+    mov ah, 0x03
+    mov bh, 0x00 ; page number 0 
+    int 0x10
+    ret
+
 svim_redraw_window:
     call os_clear_screen