svim version 0.1.0 - Saves correct when cusor is mid text, when use tab, it converts to two sapces

kernel.nasm

@@ -287,7 +287,7 @@ global_vars:
                                     ; this is the bios ID
 
 data:
-    welcome db "###############################################################################", 13, 10, "# Welcome to SingOS VERSION 0.0.5.0                                           #", 13, 10, "#                                                                             #", 13, 10, "###############################################################################", 13, 10, 'Press ESC to halt.', 13, 10, 13, 10, 0
+    welcome db "###############################################################################", 13, 10, "# Welcome to SingOS VERSION 0.0.5.1                                           #", 13, 10, "#                                                                             #", 13, 10, "###############################################################################", 13, 10, 'Press ESC to halt.', 13, 10, 13, 10, 0
     exit_message db 13, 10, 'Goodbye from SingOS',13,10,'The system has halted.', 0
     command_line db 13, 10, 'groot@SingOS $ ', 0
     number_one_zstring db '71', 0

lib/svim.nasm

@@ -189,10 +189,25 @@ svim:
     jmp .svim_loop
 .check_down_key:
     cmp ax, 0x50e0 ; down key
-    jne .no_arrow_key_pressed
+    jne .check_tab_key
     call handle_down_key_pressed
-    jmp .svim_loop    
-.no_arrow_key_pressed:
+    jmp .svim_loop 
+.check_tab_key:
+    cmp ax, 0x0f09 ; tab key
+    jne .no_special_key_pressed
+    mov bx, [buffer_for_svim_base_left_of_cursor]
+    add bx, [svim_counter_char_in_left_buffer]
+    mov BYTE [bx], 0x20 ; put space char in the buffer
+    mov BYTE [bx + 1], 0x20 ; put space char in the buffer
+    mov bx, [svim_counter_char_in_left_buffer]
+    add bx, 0x02
+    mov [svim_counter_char_in_left_buffer], bx
+
+    call svim_redraw_window
+    jmp .svim_loop
+    
+    jmp .svim_loop 
+.no_special_key_pressed:
     cmp ax, 0x11b ; ESC key
     je .end_svim
     ;cmp ax, 0x3c00 ; f2 key
@@ -216,6 +231,17 @@ svim:
     ;add bx, svim_magic_buffer_size - 2
     ;mov [bx], ax
 
+    ; When saving the file, we need to have all the data in the left buffer. 
+    ; So we loop through the right buffer and palce the data in the left. 
+     mov ax, [svim_counter_char_in_right_buffer]    
+  .copy_data_to_left_buffer:
+     cmp ax, 0
+     je .stop_copy 
+     call handle_right_key_pressed
+     dec ax
+     jmp .copy_data_to_left_buffer
+  .stop_copy:
+
     mov ax, [fileindex_for_open_file]
     mov bx, [buffer_for_svim_base_left_of_cursor]
     mov cx, [svim_counter_char_in_left_buffer]
@@ -253,29 +279,9 @@ svim:
     .delete_char:
     mov BYTE [bx], 0
     mov [svim_counter_char_in_left_buffer], cx
-    ;print_format .debug_buffer_counter, cx
-    ; Go back one space
-    ;mov ax, 0x0e08 ; ah=0x0e means teletype output. al=0x08 means backspace character.
-    ;int 0x10
-
-    ; Place a NULL
-    ;mov al, 0x0 ; NULL
-    ;int 0x10
-
-    ; Go back one space again as the above print of NULL pushes the cursor forward again.
-    ;mov ax, 0x0e08
-    ;int 0x10
     call svim_redraw_window
     jmp .svim_loop
 
-;.f_key_pushed:
-    ;mov al, 0x01    ;arg: index 1
-    ;call os_change_screen
-    ;jmp .svim_loop
-
-;.load_buffer_svim:
-
-
 handle_left_key_pressed:
     pusha
     mov ax, [svim_counter_char_in_left_buffer]
@@ -500,7 +506,7 @@ 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 v0.0.32 - Open file: ', 0
+welcome_svim_select_file db 'svim v0.1.0 - Open file: ', 0
 welcome_svim_enter_fileindex db 'Enter fileindex: ', 0
 fileindex_for_open_file dw 0
 svim_total_file_size_counter dw 0