| 1 | ; File name : MenuPage.asm
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| 2 | ; Project name : XTIDE Univeral BIOS Configurator
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| 3 | ; Created date : 15.4.2010
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| 4 | ; Last update : 27.4.2010
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| 5 | ; Author : Tomi Tilli
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| 6 | ; Description : Functions to access MENUPAGE structs.
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| 7 |
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| 8 | ; Section containing code
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| 9 | SECTION .text
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| 10 |
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| 11 | ;--------------------------------------------------------------------
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| 12 | ; Returns number of visible menuitems in MENUPAGE.
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| 13 | ;
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| 14 | ; MenuPage_GetNumberOfVisibleItems
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| 15 | ; Parameters:
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| 16 | ; DS:SI: Ptr to MENUPAGE
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| 17 | ; Returns:
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| 18 | ; AX: Number of visible menuitems
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| 19 | ; Corrupts registers:
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| 20 | ; DI
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| 21 | ;--------------------------------------------------------------------
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| 22 | ALIGN JUMP_ALIGN
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| 23 | MenuPage_GetNumberOfVisibleItems:
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| 24 | xor ax, ax ; Zero visible menuitems
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| 25 | mov di, MenuPage_IterateForNumberOfVisibleItems
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| 26 | jmp SHORT MenuPage_IterateMenuPageItems
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| 27 |
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| 28 | ;--------------------------------------------------------------------
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| 29 | ; Iteration callback function for MenuPage_GetNumberOfVisibleItems.
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| 30 | ;
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| 31 | ; MenuPage_IterateForNumberOfVisibleItems
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| 32 | ; Parameters:
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| 33 | ; AX: Number of visible menuitems found so far
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| 34 | ; DS:BX: Ptr to MENUPAGEITEM to examine
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| 35 | ; Returns:
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| 36 | ; AX: Number of visible menuitems found so far
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| 37 | ; CF: Cleared to continue iteration
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| 38 | ; Corrupts registers:
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| 39 | ; Nothing
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| 40 | ;--------------------------------------------------------------------
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| 41 | ALIGN JUMP_ALIGN
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| 42 | MenuPage_IterateForNumberOfVisibleItems:
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| 43 | test BYTE [bx+MENUPAGEITEM.bFlags], FLG_MENUPAGEITEM_VISIBLE ; Clears CF
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| 44 | jz SHORT .NextItem
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| 45 | inc ax ; Increment visible menuitems
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| 46 | ALIGN JUMP_ALIGN
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| 47 | .NextItem:
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| 48 | ret
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| 49 |
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| 50 |
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| 51 | ;--------------------------------------------------------------------
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| 52 | ; Returns pointer to MENUPAGEITEM for visible index (menu library index).
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| 53 | ;
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| 54 | ; MenuPage_GetMenuPageItemForVisibleIndex
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| 55 | ; Parameters:
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| 56 | ; CX: Index of visible menuitem
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| 57 | ; DS:SI: Ptr to MENUPAGE
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| 58 | ; Returns:
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| 59 | ; DS:DI: Ptr to MENUPAGEITEM
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| 60 | ; CF: Set if MENUPAGEITEM was found
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| 61 | ; Corrupts registers:
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| 62 | ; AX
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| 63 | ;--------------------------------------------------------------------
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| 64 | ALIGN JUMP_ALIGN
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| 65 | MenuPage_GetMenuPageItemForVisibleIndex:
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| 66 | mov ax, cx ; Menuitem index to menuitems to skip
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| 67 | mov di, MenuPage_IterateForVisibleIndex
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| 68 | jmp SHORT MenuPage_IterateMenuPageItems
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| 69 |
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| 70 | ;--------------------------------------------------------------------
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| 71 | ; Iteration callback function for MenuPage_GetMenuPageItemForVisibleIndex.
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| 72 | ;
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| 73 | ; MenuPage_IterateForVisibleIndex
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| 74 | ; Parameters:
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| 75 | ; AX: Number of visible menuitems left to skip
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| 76 | ; DS:BX: Ptr to MENUPAGEITEM to examine
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| 77 | ; Returns:
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| 78 | ; AX: Number of visible menuitems left to skip
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| 79 | ; CF: Cleared to continue iteration
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| 80 | ; Set if correct MENUPAGEITEM was found
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| 81 | ; Corrupts registers:
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| 82 | ; Nothing
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| 83 | ;--------------------------------------------------------------------
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| 84 | ALIGN JUMP_ALIGN
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| 85 | MenuPage_IterateForVisibleIndex:
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| 86 | test BYTE [bx+MENUPAGEITEM.bFlags], FLG_MENUPAGEITEM_VISIBLE ; Clears CF
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| 87 | jz SHORT .NextItem
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| 88 | sub ax, BYTE 1 ; Set CF if correct MENUITEM found
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| 89 | ALIGN JUMP_ALIGN
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| 90 | .NextItem:
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| 91 | ret
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| 92 |
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| 93 |
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| 94 | ;--------------------------------------------------------------------
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| 95 | ; Iterates MENUPAGEITEMs until terminated by callback function or
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| 96 | ; all MENUPAGEITEMs have been iterated.
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| 97 | ;
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| 98 | ; MenuPage_IterateMenuPageItems
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| 99 | ; Parameters:
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| 100 | ; AX,DX: Parameters to callback function
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| 101 | ; DI: Offset to iteration callback function
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| 102 | ; DS:SI: Ptr to MENUPAGE
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| 103 | ; Returns:
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| 104 | ; AX,DX: Return values from callback function
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| 105 | ; DS:DI: Ptr to MENUPAGEITEM (only if CF set)
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| 106 | ; CF: Cleared if terminated by end of menuitems
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| 107 | ; Set if terminated by callback function
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| 108 | ; Corrupts registers:
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| 109 | ; Nothing, unless corrupted by callback function
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| 110 | ;--------------------------------------------------------------------
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| 111 | ALIGN JUMP_ALIGN
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| 112 | MenuPage_IterateMenuPageItems:
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| 113 | push cx
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| 114 | push bx
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| 115 | eMOVZX cx, BYTE [si+MENUPAGE.bItemCnt]
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| 116 | lea bx, [si+MENUPAGE.rgMenuPageItem]
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| 117 | ALIGN JUMP_ALIGN
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| 118 | .IterationLoop:
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| 119 | call di ; Callback function
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| 120 | jc SHORT .IterationComplete ; CF set, end iteration
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| 121 | add bx, BYTE MENUPAGEITEM_size
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| 122 | loop .IterationLoop
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| 123 | clc ; Clear CF since end of MENUITEMs
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| 124 | ALIGN JUMP_ALIGN
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| 125 | .IterationComplete:
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| 126 | mov di, bx ; DS:DI points to MENUPAGEITEM
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| 127 | pop bx
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| 128 | pop cx
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| 129 | ret
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| 130 |
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| 131 |
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| 132 | ;--------------------------------------------------------------------
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| 133 | ; Updates number of menuitems and redraws them.
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| 134 | ;
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| 135 | ; MenuPage_InvalidateItemCount
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| 136 | ; Parameters:
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| 137 | ; DS:SI: Ptr to MENUPAGE
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| 138 | ; Returns:
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| 139 | ; Nothing
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| 140 | ; Corrupts registers:
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| 141 | ; AX, BX, CX, DX
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| 142 | ;--------------------------------------------------------------------
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| 143 | ALIGN JUMP_ALIGN
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| 144 | MenuPage_InvalidateItemCount:
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| 145 | push di
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| 146 | call MenuPage_GetNumberOfVisibleItems
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| 147 | mov cx, ax
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| 148 | mov dl, MFL_UPD_ITEM | MFL_UPD_NFO
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| 149 | call Menu_InvItemCnt
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| 150 | pop di
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| 151 | ret
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