Software Vault: The Diamond Collection/The Diamond Collection (Software Vault)(Digital Impact).ISO/cdr48/386p_200.zip/386MENU.ASM

Assembly Source File | 1995-01-14 | 29KB | 1,060 lines

        .386p
code32 segment para public use32
       assume cs:code32,ds:code32
include 386power.inc
include chario.inc
include 386video.inc
include 386keyb.inc
include pix.inc

; include common menu definitions
include 386mnu.inc

INPUT_ON macro
        mov edi,_CHRMENU2
        mov _CHRFNT,edi
        endm

INPUT_OFF macro
        mov edi,_CHRMENU1
        mov _CHRFNT,edi
        endm

E_NAME  =4
E_VALUE =8
E_FN    =12
E_MIN   =16
E_MAX   =20
E_STEP  =24

; Header:            text                               menu title
;
;       db M_HEADER,t_col,maxwidth,touchngo
;       dd text_p,x,y
;
;   x,y    = initial position IN PIXELS of the upper left border
;            of this menu, or -1,-1 if the menu manager can freely choose
;            where popup these.
;            N.B. if x,y are out of range or the menu manager supports
;                 popup menu repositioning, these values will be
;                 modified by the menu manager.
;   t_col  = column position of entry name
;   text_p = code32 offset to asciiz string to show starting from
;            t_col column.
;   maxwidth = maximum menu width in characters
;   touchngo:  0=only ESC or an "exit" entry will end this menu
;              1=AFTER the first SELECTION, end this menu
;                (useful for the "save game" or "load game" menu)

EB_T_COL =1
EB_MAXW  =2
EB_TNG   =3
sho_name:
       mov edx,[ecx*4+ENTRY_ROW]
       mov eax,_VDispX
       mov esi,[ecx*4+ENTRY_DATA]
       mov edi,_ScrBase
       movzx ebp,byte ptr [esi+EB_T_COL]
       add edx,_VDispY
       mov ebx,[esi+E_NAME]
       lea eax,[eax+ebp*8+16]
       call _PutString
       ret

name_show:
       ;ecx = current entry index
       pushad
       call sho_name
       popad
       ret


; Bar:               text  <-]#############[+>          a "volume level" bar
;
;       db M_BAR,t_col,in_col,in_len
;       dd text_p, value_p, func_p,min, max, step
;
;   in_col  = colum position of the "volume level bar"
;             starting with the <-] character
;   in_len  = lenght of the "volume bar" (excluding the <-] and [+> characters)
;   value_p = code32 offset to the variable containing the value to show/set
;   min     = minimum allowed value
;   max     = maximum allowed value
;   func_p  = code32 offset of function to call every time the entry value
;             is altered (use this for value checking/correction
;             or to trigger special actions depending on the value )
;             Function parameters:
;                       in:
;                       Segment registers pointing to the usual 386P segments.
;                       EAX = value "requested by user"
;                             to set into the variable pointed by value_p
;                       out:
;                       EAX = ALLOWED value to store into the variable
;                             (the menu manager will store it properly)
;                       IF CARRY SET, REFRESH ALL THE DISPLAYED DATA
;                       All other registers preserved.
;
;   step    = increment/decrement step for the variable pointed by value_p
;

udec: ; bar and unsigned integers
bdec:
       ; ecx = current entry index
       mov esi,[ecx*4+ENTRY_DATA]
       mov ebx,[esi+E_VALUE]
       mov eax,[ebx]
       mov edx,[esi+E_MIN]
       mov ebp,[esi+E_STEP]
       sub eax,edx
       jnb gb_min
cut_down:
       mov eax,edx
       jmp short gb_checked
gb_min:
       sub eax,ebp
       jb cut_down
       add eax,edx
       jmp short gb_checked

uinc: ; bar and unsigned integers
binc:
       ; ecx = current entry index
       mov esi,[ecx*4+ENTRY_DATA]
       mov ebx,[esi+E_VALUE]
       mov edx,[esi+E_MAX]
       mov ebp,[esi+E_STEP]
       mov eax,[ebx]
       add eax,ebp
       sub eax,edx
       jb  gb_max
       xor eax,eax
gb_max:
       add eax,edx
gb_checked:
       xor edx,edx
       call [esi+E_FN]
       mov dl,[esi] ; menu type
       mov [ebx],eax
       jnc gb_rfr
       mov eax,ENTRY_DATA
       call m_refresh
gb_rfr:
       jmp dword ptr [edx*4+SHOW] ;chain-call

EB_IN_COL =2
EB_IN_LEN =3

bstring db 40 dup(0)
bshow:
       ;ecx = current entry index
       push ecx
       call sho_name
       mov edx,[esi+E_VALUE]
       xor ebx,ebx
       mov eax,[edx]
       mov ebp,[esi+E_MIN]
       mov bl,[esi+EB_IN_LEN]
       mov edi,[esi+E_MAX]
       cmp eax,edi
       jbe  low_enough
       mov [edx],edi
       mov eax,edi
low_enough:
       shl ebx,3 ; multiply by 8 to get pixel lenght
       sub eax,ebp
       jnbe high_enough
       mov [edx],ebp  ; round to minimum
       mov eax,ebp    ;
high_enough:
       sub edi,ebp
       mul ebx
       div edi
       ; eax=bar level in pixels
       ; ebx=bar maximum bar level in pixels
       mov edi,offset bstring
       shr ebx,3 ; back to "characters"
       mov edx,eax
       mov byte ptr [edi],ARROW_MINUS
lupp:
       inc edi
       sub eax,8
       jbe outlevel
       mov byte ptr [edi],BAR8
       dec ebx
       jmp short lupp
outlevel:
       add eax,8
       jne goodbar
       mov al,BAR0  ; we have to avoid NULs
goodbar:
       mov [edi],al
empbar:
       inc edi
       dec ebx
       je outbarr
       mov byte ptr [edi],BAR0
       jmp short empbar
outbarr:
       mov edx,[ecx*4+ENTRY_ROW]
       mov word ptr [edi],ARROW_PLUS ; fancy trick, the high byte is NUL
       mov ebx, offset bstring
       mov eax,_VDispX
       add edx,_VDispY
       movzx ebp,byte ptr [esi+EB_IN_COL]
       mov edi,_ScrBase
       lea eax,[eax+ebp*8+16]
       call _PutString
       pop ecx
       ret

; Int:               text  <-]_____________[+>          a 32bit integer value
;
;       db M_INT,t_col,in_col,idigits
;       dd text_p, value_p, func_p, min, max, step
;
;       idigits = maximum number of digits including optional sign character

EB_IDIGITS=3

isel:
      xor eax,eax
      mov edx,[ecx*4+ENTRY_ROW]
      mov esi,[ecx*4+ENTRY_DATA]
      push ecx
      add edx,_VDispY
      xor ecx,ecx
      mov al,[esi+EB_IN_COL]
      mov ebx,[esi+E_VALUE]
      shl eax,3 ; multiply by 8
      mov cl,[esi+EB_IDIGITS]
      push ebx
      INPUT_ON
      add eax,_VDispX
      mov ebx,[ebx]
      mov edi,_ScrBase
      add eax,16
      call _GetInt
      mov eax,ebx ; copy returned value
      INPUT_OFF
      pop ebx
      pop ecx
      jmp icheck


idec:
       ; ecx = current entry index
       mov esi,[ecx*4+ENTRY_DATA]
       mov ebx,[esi+E_VALUE]
       mov eax,[ebx]
       sub eax,[esi+E_STEP]
       jmp short icheck

iinc:
       ; ecx = current entry index
       mov esi,[ecx*4+ENTRY_DATA]
       mov ebx,[esi+E_VALUE]
       mov eax,[ebx]
       add eax,[esi+E_STEP]
icheck:
       cmp eax,[esi+E_MIN]
       jnl gi_min
       mov eax,[esi+E_MIN]
gi_min:
       cmp eax,[esi+E_MAX]
       jle gi_max
       mov eax,[esi+E_MAX]
gi_max:
       call [esi+E_FN]
       mov [ebx],eax
       jnc gi_rfr
       mov eax,ENTRY_DATA
       call m_refresh
gi_rfr:
       ; chain-call to ishow

ushow:
ishow:
       ;ecx = current entry index
       push ecx
       call sho_name
       xor ebx,ebx
       mov edx,[ecx*4+ENTRY_ROW]
       xor ecx,ecx
       mov bx,[esi+EB_IN_COL]
       INPUT_ON
       mov eax,_VDispX
       xchg cl,bh ; cl = EB_IDIGITS
       add edx,_VDispY
       mov ebp,[esi+E_VALUE]
       lea eax,[eax+ebx*8+16]
       mov edi,_ScrBase
       mov ebx,ds:[ebp]
       cmp byte ptr [esi],M_INT
       jne is_unsigned
       call _PutInt
       INPUT_OFF
       pop ecx
       ret
is_unsigned:
       call _PutUnsigned
       INPUT_OFF
       pop ecx
       ret

;
; Unsigned:          text  <-]_____________[+>          a 32bit dword value
;
;       db M_UNSIGNED,t_col,in_col,udigits
;       dd text_p, value_p, func_p, min, max, step
;
;        udigits = maximum number of digits (and no sign)

; ushow is included with ishow
; uinc and udec are the same as bdec and dinc

usel:
      xor eax,eax
      mov edx,[ecx*4+ENTRY_ROW]
      mov esi,[ecx*4+ENTRY_DATA]
      push ecx
      add edx,_VDispY
      xor ecx,ecx
      INPUT_ON
      mov al,[esi+EB_IN_COL]
      mov ebx,[esi+E_VALUE]
      shl eax,3 ; multiply by 8
      mov cl,[esi+EB_IDIGITS]
      add eax,_VDispX
      mov ebx,[ebx]
      mov edi,_ScrBase
      add eax,16
      call _GetUnsigned
      mov eax,ebx ; copy returned value
      INPUT_OFF
      pop ecx
      mov ebx,[esi+E_VALUE]
      mov edx,[esi+E_MIN]
      mov ebp,[esi+E_MAX]
      cmp eax,edx
      jnb gb_mgo
      mov eax,edx
gb_mgo:
      cmp eax,ebp
      jb gb_go
      mov eax,ebp
gb_go:
      jmp gb_checked

;
; Pick_list:         text  <-]_____________[+>          choose from a list
;
;       db M_PICK,t_col,in_col,max_item_len
;       dd text_p, value_p, func_p,picklist_p, picktop
;
;       max_item_len = maximum lenght in characters of the strings
;                      pointed by the "pick list" table
;                      EVERY string into the pick-list must have this lenght
;                      (with "padding" spaces if the text is shorter
;                       and excluding the final NUL from the count).
;
;       value_p = pointer to a dword with values ranging
;                 from 0         (for the first picklist string)
;                 to   picktop-1 (for the last  picklist string).
;       picklist_p = pointer to an array of pointers (all code32 offsets)
;                    to strings describing the "values" you can choose]
E_PICKLIST = 16
E_PICKTOP  = 20

pdec:
       ; ecx = current entry index
       mov esi,[ecx*4+ENTRY_DATA]
       mov ebx,[esi+E_VALUE]
       mov eax,[ebx]
       or eax,eax
       jz pick_good
       dec eax
       jmp short pcheck

pinc:
       ; ecx = current entry index
       mov esi,[ecx*4+ENTRY_DATA]
       mov ebx,[esi+E_VALUE]
       mov eax,[ebx]
       inc eax
pcheck:
       cmp eax,[esi+E_PICKTOP]
       jb pick_good
       mov eax,[esi+E_PICKTOP]
       dec eax
pick_good:
       call [esi+E_FN]
       mov [ebx],eax
       jnc pick_rfr
       mov eax,ENTRY_DATA
       call m_refresh
pick_rfr:
       ; chain call to pshow
pshow:
       ;ecx = current entry index
       push ecx
       call sho_name
       mov ebx,[esi+E_VALUE]
       mov edx,[ecx*4+ENTRY_ROW]
       movzx ebp,byte ptr [esi+EB_IN_COL]
       INPUT_ON
       mov eax,_VDispX
       add edx,_VDispY
       mov ebx,[ebx]
       mov esi,[esi+E_PICKLIST]
       mov edi,_ScrBase
       lea eax,[eax+ebp*8+16]
       mov ebx,[esi+ebx*4] ; load pointer to string to display
       call _PutString
       INPUT_OFF
       pop ecx
       ret

; String:            text  _____________                string entry
;
;       db M_STRING,t_col,in_col,max_string_characters
;       dd text_p, value_p, sfunc_p
;
;       function to call to check string, it is like func_p
;       but eax is a POINTER to the actual string data
;       and you cannot modify it!!!!!!!
ssel:
      mov edx,[ecx*4+ENTRY_ROW]
      mov esi,[ecx*4+ENTRY_DATA]
      push ecx
      INPUT_ON
      mov eax,_VDispX
      xor ecx,ecx
      add edx,_VDispY
      movzx ebp,byte ptr[esi+EB_IN_COL]
      mov ebx,[esi+E_VALUE]
      mov cl,[esi+EB_IDIGITS]
      mov edi,_ScrBase
      lea eax,[eax+ebp*8+16]
      call _GetString
      INPUT_OFF
      pop ecx
      mov eax,[esi+E_VALUE]
      call [esi+E_FN]
      jnc str_rfr
       mov eax,ENTRY_DATA
       call m_refresh
str_rfr:
      ; show it
sshow:
       ;ecx = current entry index
       push ecx
       ; first of all, execute a row refresh
       mov esi,DARK6_TEXT+(DARK6_TEXT shl 8)+(DARK6_TEXT shl 16)+(DARK6_TEXT shl 24)
       mov eax,_VDispX
       mov ebx,8
       mov edx,_VDispY
       add eax,16 ; skip the cursor columns
       push ecx
       add edx,[ecx*4+ENTRY_ROW]
       mov edi,_ScrBase
       mov ecx,38*2
       call _Block    ; set background
       pop ecx
       ; menu name
       call sho_name
       ; string value
       INPUT_ON
       mov edx,[ecx*4+ENTRY_ROW]
       movzx ebp,byte ptr [esi+EB_IN_COL]
       mov eax,_VDispX
       add edx,_VDispY
       mov ebx,[esi+E_VALUE]
       lea eax,[eax+ebp*8+16]
       mov edi,_ScrBase
       call _PutString
       INPUT_OFF
       pop ecx
       ret

; Submenu:           text                               call a submenu
;
;       db M_MENU,t_col,thru,m_disable
;       dd text_p, menu_p
;
;       menu_p = code32 offset of M_HEADER entry of menu to call
;                when this entry is clicked.
;       thru :  0 = when returning, reactivate this menu and refresh screen
;               1 = when returning, quit this menu automatically.
;       m_disable: 0 = submenu can be selected
;                  1 = this submenu cannot be activated

EB_THRU    =2
EB_DISABLE =3
msel:
        mov eax,ENTRY_DATA ; get header address
        mov esi,[ecx*4+ENTRY_DATA]
        push eax
        push ecx
        cmp byte ptr [esi+EB_DISABLE],0
        jne old_menu
        mov eax,[esi+E_VALUE]
        call _PopMenu
        cmp byte ptr [esi+EB_THRU],0
        je old_menu
        pop ecx
        pop eax
        pop ebx ; discard return address
        ; menu termination
        popad
        pop _CHRFNT
        ret

old_menu:
        pop ecx
        pop eax
        pushad
        call m_refresh
        popad
        ret


; Call:           text                               call a subroutine
;
;       db M_CALL,t_col,thru,0
;       dd text_p, procedure_p
;
;       procedure_p = code32 offset of code to call
;                     when this entry is clicked.
;                     The function assumes cs=_SelCode, ds=es=ss=fs=_SelData
;                     gs=_SelZero, like the _PopMenu procedure.
;                     The called procedure must preserve all registers.
;
csel:
        mov eax,ENTRY_DATA ; get header address
        mov esi,[ecx*4+ENTRY_DATA]
        push _CHRFNT
        push eax
        call dword ptr [esi+E_VALUE]
        cmp byte ptr [esi+EB_THRU],0
        je old_call
        pop eax
        pop _CHRFNT
        pop ebx ; discard return address
        ; menu termination
        popad
        pop _CHRFNT
        ret

old_call:
        pop eax
        pop _CHRFNT
        call m_refresh
        ret

; Toggle:            [] text                            boolean entry
;
;       db M_TOGGLE,t_col,flag_col,0
;       dd text_p, bool_p, func_p
;
;       flag_col = column position of '[]' on/off character
;       bool_p   = pointer to BYTE that can be toggled to 0 or to 1
;                  when clicking on this entry.
;
        align byte
TOGGLES db FLAG_OFF,0,FLAG_ON,0

togg:
       ; ecx = current entry index
       mov esi,[ecx*4+ENTRY_DATA]
       mov ebx,[esi+E_VALUE]
       mov al,[ebx]
       inc al
tcheck:
       and al,1
       call [esi+E_FN]
       mov [ebx],al
       jnc tg_rfr
       mov eax,ENTRY_DATA
       call m_refresh
tg_rfr:
       ; chain call to tshow
tshow:
       ;ecx = current entry index
       push ecx
       ; menu name
       call sho_name
       ; toggle value
       mov edx,[ecx*4+ENTRY_ROW]
       xor ebx,ebx
       mov edi,[esi+E_VALUE]
       movzx ebp,byte ptr [esi+EB_IN_COL]
       mov eax,_VDispX
       mov bl,[edi]
       add edx,_VDispY
       lea eax,[eax+ebp*8+16]
       lea ebx,[ebx*2+TOGGLES]
       mov edi,_ScrBase
       call _PutString
       pop ecx
       ret

; Key:               text  keytext                      keyboard key value
;
;       db M_KEY,t_col,key_col,0
;       dd text_p, key_p, func_p
;
;       key_col = column position of TEXT (obtained from _KeyNames)
;                 describing the key.
;       key_p   = pointer to BYTE that contains key code
;

ksel:  mov esi,[ecx*4+ENTRY_DATA]
       mov edx,[ecx*4+ENTRY_ROW]
       mov ebx,[esi+E_VALUE]
       mov ebp,[esi+E_FN]
       mov byte ptr [ebx],0
       push eax ; dummy push
ooh_retry:
       pop eax ; discard flags if retried
       call kshowinput
       call entry_refresh
       pushad
       call _ScanKeyb
       mov edi,eax ; clear keyboard table
       mov ecx,32  ;
       xor eax,eax ;
       rep stosd   ;
       popad
wait_release:
       call _ScanKeyb
       mov ebx,eax    ;key table pointer
       mov eax,1      ;key index (0 is NUL, so skip it)
kscanning:
       cmp byte ptr [ebx+eax],KPRESSED
       jne nkukkato
       push ecx
       mov byte ptr [ebx+eax],0
       mov ecx,_KeyNames
       mov ecx,[ecx+eax*4]
       cmp ecx,_NotAKey
       pop ecx
       jne kukkato ; it is a known key
nkukkato:
       inc eax ; increase index
       cmp eax,128
       jb  kscanning
       jmp short wait_release
kukkato:
       call ebp
       pushfd ;save flags
       or eax,eax
       jz ooh_retry ; a NUL entry is not allowed
       mov ebx,[esi+E_VALUE]
       mov [ebx],al
       popfd
       ; chain call to kshow
       jnc ky_rfr
       mov eax,ENTRY_DATA
       call m_refresh
ky_rfr:

kshow:
       ;ecx = current entry index
       pushad
       ; first of all, execute a row refresh
       mov esi,DARK6_TEXT+(DARK6_TEXT shl 8)+(DARK6_TEXT shl 16)+(DARK6_TEXT shl 24)
       mov eax,_VDispX
       mov ebx,8
       mov edx,_VDispY
       add eax,16 ; skip the cursor columns
       push ecx
       add edx,[ecx*4+ENTRY_ROW]
       mov edi,_ScrBase
       mov ecx,38*2
       call _Block    ; set background
       pop ecx
       ; menu name
       call sho_name
       ; key's value
       INPUT_ON
       mov esi,[ecx*4+ENTRY_DATA]
       mov ebx,[esi+E_VALUE]
       movzx ebp,byte ptr [esi+EB_IN_COL]
       mov eax,_VDispX
       mov edx,_VDispY
       movzx ebx,byte ptr [ebx]
       mov edi,_ScrBase
       lea eax,[eax+ebp*8+16]
       shl ebx,2
       add edx,[ecx*4+ENTRY_ROW]
       add ebx,_KeyNames
       mov ebx,[ebx]
       call _PutString
       INPUT_OFF
       popad
       ret

pressakey db 'press a key',0

kshowinput:  ; "show key entry" for input
       ;ecx = current entry index
       pushad
       ; first of all, execute a row refresh
       mov esi,DARK6_TEXT+(DARK6_TEXT shl 8)+(DARK6_TEXT shl 16)+(DARK6_TEXT shl 24)
       mov eax,_VDispX
       mov ebx,8
       mov edx,_VDispY
       add eax,16 ; skip the cursor columns
       push ecx
       add edx,[ecx*4+ENTRY_ROW]
       mov edi,_ScrBase
       mov ecx,38*2
       call _Block    ; set background
       pop ecx
       ; menu name
       call sho_name
       ; "press a key"
       INPUT_ON
       mov esi,[ecx*4+ENTRY_DATA]
       movzx ebp,byte ptr [esi+EB_IN_COL]
       mov eax,_VDispX
       mov edx,_VDispY
       mov edi,_ScrBase
       lea eax,[eax+ebp*8+16]
       add edx,[ecx*4+ENTRY_ROW]
       mov ebx,offset pressakey
       call _PutString
       INPUT_OFF
       popad
       ret

; Exit:              text                               "exit from this menu"
;
;       db M_EXIT,t_col,0,0
;       dd exit_text_p
;
;       exit_text_p = pointer to the entry name
;                     (for example:  'CONTINUE GAME',0)
;
xsel:
      pop eax ; discard return address
      popad
      pop _CHRFNT
      ret

; End:               etext                              end menu marker
;                    etext                              with optional text
;                    ....
;                    etext
;
;
;       db M_END,t_col,t_lines,0
;       dd etext_p
;
;       t_lines = lines of text/string count of strings pointed by etext_p
;
;       etext_p = pointer to  a table of pointers to asciiz text strings
;                 to show on the bottom of the menu
;                  if ( etext_p == 0 ) then no text
;                 For example:
;                       if etext_p  contains offset menu_usage
;                       and t_lines contains 4
;                       and there is:
;
;                       menu_usage dd e0,e1,e2,e3,e4,e5
;
;                           e0    db ' HOW',0
;                           e1    db '  MANY',0
;                           e2    db '   LINES',0
;                           e3    db 'YOU',0
;                           e4    db 'WILL',0
;                           e5    db '  SEE?',0
;
;                       You will see on the bottom of the menu:
;                               HOW
;                                MANY
;                                 LINES
;                              YOU
;
;                       (the other strings are not displayed)

EB_T_LINES =2

eshow: push ecx
       mov edx,[ecx*4+ENTRY_ROW]
       mov eax,_VDispX
       mov esi,[ecx*4+ENTRY_DATA]
       mov edi,_ScrBase
       movzx ebx,byte ptr [esi+EB_T_COL]
       add edx,_VDispY
       movzx ebp,byte ptr [esi+EB_T_LINES]
       lea eax,[eax+ebx*8+16]
       mov esi,[esi+E_NAME]
nxstring:
       mov ebx,[esi]
       add esi,4
       call _PutString
       add edx,8
       dec ebp
       jnz nxstring
       pop ecx
       ret

none:
        ret

no_more_cursor db '  ',0

uup:
        cmp ecx,1
        jbe noo_id
        mov ebp,-1
        jmp short pulisci
dnn:
        cmp ecx,ENTRIES
        jnb noo_id
        mov ebp,+1
pulisci:
        push ecx
        mov eax,0
        mov edx,[ecx*4+ENTRY_ROW]
        mov ebx,8
        mov ecx,4
        mov edi,_ScrBase
        call _TouchBlock
        mov eax,_VDispX
        mov ebx,offset no_more_cursor
        add edx,_VDispY
        mov edi,_ScrBase
        call _PutString
        pop ecx
        add ecx,ebp
noo_id: ret

align byte
;             M_HEADER  M_BAR M_INT M_UNSIGNED M_PICK M_STRING M_MENU    M_CALL    M_TOGGLE M_KEY      M_EXIT     M_END
ENTRY_SIZE db 4*4,      7*4,  7*4,  7*4,       6*4,   4*4,     3*4,      3*4,      4*4,     4*4,       2*4,       2*4
align dword
INCREMENT  dd none,     binc, iinc, uinc,      pinc,  none,    none,     none,     togg,    none,      none,      none
DECREMENT  dd none,     bdec, idec, udec,      pdec,  none,    none,     none,     togg,    none,      none,      none
SELECT     dd none,     none, isel, usel,      none,  ssel,    msel,     csel,     none,    ksel,      xsel,      none
UPP        dd none,     uup,  uup,  uup,       uup,   uup,     uup,      uup,      uup,     uup,       uup,       none
DDN        dd none,     dnn,  dnn,  dnn,       dnn,   dnn,     dnn,      dnn,      dnn,     dnn,       dnn,       none
SHOW       dd name_show,bshow,ishow,ushow,     pshow, sshow,   name_show,name_show,tshow,   kshow,     name_show, eshow

ENTRY_DATA dd 25 dup(0)
ENTRY_ROW  dd 25 dup(0)
ENTRIES    dd 0   ; "active" entries (excluding m_header and m_end)

align byte
; empty string to clean screen
zapper     db '                                        ',0

tfe db '386MENU: Too few menu entries, need at least a menu exit option',CR,LF,'$'
too_few_entries:
        mov _386Return,offset tfe
        jmp _Exit

tmm db '386MENU: Too many menu entries',CR,LF,'$'
too_many_entries:
        mov _386Return,offset tmm
        jmp _Exit

touchngo db 0

m_refresh: ; refresh menu data structures and screen image
           ; eax= ptr to menu description
        pushad
        mov dl,byte ptr [eax+EB_TNG]
        xor ebp,ebp
        xor ebx,ebx
        mov touchngo,dl
        mov edi,offset ENTRY_DATA
        xor edx,edx
again:
        mov bl,[eax]
        stosd ; data entry position
        mov dl,[ebx+ENTRY_SIZE]
        inc ebp
        add eax,edx
        cmp bl,M_END
        jne again
        cmp ebp,23 ; 25 lines - 2 interlines == 23 entries max.
        ja  too_many_entries
        sub eax,edx ; back to last entry
        xor edx,edx
        sub ebp,2 ; "valid entries" count
        jbe too_few_entries
        mov ebx,22   ; 25 - 1_title_row - 2_interlines
        mov dl,[eax+EB_T_LINES]  ; get lines of ending text
        sub ebx,edx  ; available_entries   - bottom_menu_text
        shl edx,3 ; pixel-lines of text
        push edx ;save lines of text in the end
        ; now calculate menu row positions
        shl ebx,3 ; get value in pixels
        mov ENTRIES,ebp ; save "valid entries" count
        xor edx,edx
        mov eax,ebx       ; divide available lines by entries
        div ebp           ;
        cmp eax,8
        jb too_many_entries ; less than 8 lines for entry? are you nuts?
        mov ebx,eax ; copy
        shr eax,1 ; divide by two
        mov edi,offset ENTRY_ROW
        mov ecx,ENTRIES
        add eax,8 ; add one interline
        mov dword ptr edi [edi],0 ; title position
        add edi,4
row_row:
        stosd
        add eax,ebx
        dec ecx
        jne row_row
        mov eax,200
        pop esi   ; restore pixel-lines of text in menu bottom
        sub eax,esi
        mov [edi],eax ; end text position
        ; menu data setup complete
freshen: ; refresh displayed data
        mov esi,DARK6_TEXT+(DARK6_TEXT shl 8)+(DARK6_TEXT shl 16)+(DARK6_TEXT shl 24)
        mov eax,_VDispX
        mov ecx,40*2
        mov edi,_ScrBase
        mov ebx,25*8
        mov edx,_VDispY
        call _Block    ; set background color
        ; NOW WRITE ENTRIES
        mov edx,ENTRIES
        mov esi,offset ENTRY_DATA
        xor eax,eax
        xor ecx,ecx
        add edx,2 ; header & end
showall:
        mov ebx,[esi]
        add esi,4
        mov  al,[ebx]  ; get menu entry type
        pushad
        call dword ptr [eax*4+SHOW]
        popad
        inc ecx
        dec edx
        jne showall
        xor eax,eax
        xor edx,edx
        mov ecx,40*2
        mov ebx,25*8
        call _TouchBlock
        call _PageFlip1
        ; and now go for menu animation
        popad
        ret

il_cursore db POINT0,POINT1,0

entry_refresh:
        pushad
        xor eax,eax
        mov ebx,8
        mov edx,[ecx*4+ENTRY_ROW]
        mov ecx,40*2
        call _TouchBlock ; refresh the current entry
        mov eax,_VDispX
        add edx,_VDispY
        mov ebx,offset il_cursore
        mov edi,_ScrBase
        call _PutString  ; write cursor
        call _PageFlip1
        popad
        ret

        public _PopMenu

_PopMenu:; eax = pointer to menu data
        push _CHRFNT
        pushad
        ; use the "not-input" character set
        INPUT_OFF
        call m_refresh ; refresh/generate the menu data from the description
        mov ecx,1 ; cursor position on first entry
wazoom: call entry_refresh
        call _WaitKey
wazaam:
        xor ebx,ebx
        mov edx,[ecx*4+ENTRY_DATA]
        mov bl,[edx] ; get entry type
        cmp byte ptr [eax+_ESC],KPRESSED  ; WAIT FOR KEY PRESS&RELEASE
        setnz [eax+_ESC]
        je thee_eend
        cmp byte ptr [eax+_LEFT],KPRESSED
        setnz [eax+_LEFT]
        je decc
        cmp byte ptr [eax+_KMINUS],KPRESSED
        setnz [eax+_KMINUS]
        jne nodec
decc:
        call [ebx*4+DECREMENT]
        jmp wazoom
nodec:
        cmp byte ptr [eax+_RIGHT],KPRESSED
        setnz [eax+_RIGHT]
        je incc
        cmp byte ptr [eax+_KPLUS],KPRESSED
        setnz [eax+_KPLUS]
        jne noinc
incc:
        call [ebx*4+INCREMENT]
        jmp wazoom
noinc:  cmp byte ptr [eax+_UP],KPRESSED
        setnz [eax+_UP]
        jne noo_uup
        call [ebx*4+UPP]
        jmp wazoom
noo_uup:cmp byte ptr [eax+_DOWN],KPRESSED
        setnz [eax+_DOWN]
        jne noo_dnn
        call [ebx*4+DDN]
        jmp wazoom
noo_dnn:cmp byte ptr [eax+_ENTER],KPRESSED
        setnz [eax+_ENTER]
        jne wazoom
        call [ebx*4+SELECT]
        test touchngo,01
        jz notouchngo
        call xsel ; trigger menu exit if this is a touch&go menu
notouchngo:
        call entry_refresh
rescan:
        call _WaitKey
        test byte ptr [eax+_ENTER],KPRESSED   ; do this
        mov byte ptr [eax+_ENTER],0           ;
        jnz rescan                            ; to avoid key "bounces"
        jmp wazaam
thee_eend:
        popad
        pop _CHRFNT
        ret

; Look into 386menu.txt for more info.
; This function lets you pop-up and "animate" a menu you defined.
; you can select and manipolate menu entry data
; using the keyboard
;
;  up/down   = change entry
;  enter     = enter a value from the keyboard / trigger entry
;              (you can do this only one, then you must use another key
;               before you can "select" the entry again
;               this is because of the "debouncing" routine)
;  left,'-'  = decrease entry's value
;  right,'+' = increase entry's value
;  esc       = quit menu (only if menu definition data allows it)
;
; N.B. It supposed that the calling routine will choose the best method
;      to save the current screen context before performing the call
;      and then it will refresh it on return.

code32  ends
        end