| 1 | ; Project name : Assembly Library
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| 2 | ; Description : Functions for calculation menu window dimensions.
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| 3 |
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| 4 | ; Section containing code
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| 5 | SECTION .text
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| 6 |
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| 7 | ;--------------------------------------------------------------------
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| 8 | ; MenuLocation_GetTextCoordinatesToAXforItemInAX
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| 9 | ; Parameters
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| 10 | ; AX: Item index
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| 11 | ; SS:BP: Ptr to MENU
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| 12 | ; Returns:
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| 13 | ; AL: Column (X)
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| 14 | ; AH: Row (Y)
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| 15 | ; Corrupts registers:
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| 16 | ; Nothing
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| 17 | ;--------------------------------------------------------------------
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| 18 | ALIGN JUMP_ALIGN
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| 19 | MenuLocation_GetTextCoordinatesToAXforItemInAX:
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| 20 | sub ax, [bp+MENU.wFirstVisibleItem] ; Item to line
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| 21 | xchg al, ah ; Line to AH, clear AL
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| 22 | add ax, (MENU_TEXT_ROW_OFFSET<<8) | MENU_TEXT_COLUMN_OFFSET
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| 23 | SKIP2B f ; cmp ax, <next instruction>
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| 24 | ; Fall to MenuLocation_GetItemBordersTopLeftCoordinatesToAX
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| 25 |
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| 26 | ;--------------------------------------------------------------------
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| 27 | ; MenuLocation_GetItemBordersTopLeftCoordinatesToAX
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| 28 | ; MenuLocation_GetTitleTextTopLeftCoordinatesToAX
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| 29 | ; MenuLocation_GetTitleBordersTopLeftCoordinatesToAX
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| 30 | ; MenuLocation_GetInformationTextTopLeftCoordinatesToAX
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| 31 | ; MenuLocation_GetBottomBordersTopLeftCoordinatesToAX
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| 32 | ; Parameters
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| 33 | ; SS:BP: Ptr to MENU
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| 34 | ; Returns:
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| 35 | ; AL: Column (X)
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| 36 | ; AH: Row (Y)
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| 37 | ; Corrupts registers:
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| 38 | ; Nothing
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| 39 | ;--------------------------------------------------------------------
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| 40 | MenuLocation_GetItemBordersTopLeftCoordinatesToAX:
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| 41 | xor ax, ax
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| 42 | jmp SHORT AddItemBordersTopLeftCoordinatesToAX
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| 43 |
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| 44 | ALIGN JUMP_ALIGN
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| 45 | MenuLocation_GetTitleTextTopLeftCoordinatesToAX:
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| 46 | mov ax, (MENU_TEXT_ROW_OFFSET<<8) | MENU_TEXT_COLUMN_OFFSET
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| 47 | SKIP2B f ; cmp ax, <next instruction>
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| 48 | MenuLocation_GetTitleBordersTopLeftCoordinatesToAX:
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| 49 | xor ax, ax
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| 50 | jmp SHORT MenuLocation_AddTitleBordersTopLeftCoordinatesToAX
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| 51 |
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| 52 | ALIGN JUMP_ALIGN
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| 53 | MenuLocation_GetInformationTextTopLeftCoordinatesToAX:
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| 54 | mov ax, (MENU_TEXT_ROW_OFFSET<<8) | MENU_TEXT_COLUMN_OFFSET
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| 55 | jmp SHORT AddInformationBordersTopLeftCoordinatesToAX
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| 56 |
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| 57 | ALIGN JUMP_ALIGN
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| 58 | MenuLocation_GetBottomBordersTopLeftCoordinatesToAX:
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| 59 | xor ax, ax
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| 60 | ; Fall to .AddBottomBordersTopLeftCoordinatesToAX
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| 61 |
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| 62 | ;--------------------------------------------------------------------
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| 63 | ; .AddBottomBordersTopLeftCoordinatesToAX
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| 64 | ; AddInformationBordersTopLeftCoordinatesToAX
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| 65 | ; AddItemBordersTopLeftCoordinatesToAX
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| 66 | ; MenuLocation_AddTitleBordersTopLeftCoordinatesToAX
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| 67 | ; Parameters
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| 68 | ; AX: Zero of offset
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| 69 | ; SS:BP: Ptr to MENU
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| 70 | ; Returns:
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| 71 | ; AL: Column (X)
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| 72 | ; AH: Row (Y)
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| 73 | ; Corrupts registers:
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| 74 | ; Nothing
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| 75 | ;--------------------------------------------------------------------
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| 76 | .AddBottomBordersTopLeftCoordinatesToAX:
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| 77 | stc ; Compensate for Information top border
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| 78 | adc ah, [bp+MENUINIT.bInfoLines]
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| 79 | ALIGN JUMP_ALIGN
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| 80 | AddInformationBordersTopLeftCoordinatesToAX:
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| 81 | push cx
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| 82 | call MenuScrollbars_GetMaxVisibleItemsOnPageToCX
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| 83 | inc cx ; Compensate for Items top border
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| 84 | add ah, cl
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| 85 | pop cx
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| 86 | ALIGN JUMP_ALIGN
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| 87 | AddItemBordersTopLeftCoordinatesToAX:
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| 88 | stc ; Compensate for Title top border
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| 89 | adc ah, [bp+MENUINIT.bTitleLines]
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| 90 | ALIGN JUMP_ALIGN
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| 91 | MenuLocation_AddTitleBordersTopLeftCoordinatesToAX:
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| 92 | push di
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| 93 | push ax
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| 94 | CALL_DISPLAY_LIBRARY GetColumnsToALandRowsToAH
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| 95 | sub al, [bp+MENUINIT.bWidth]
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| 96 | sub ah, [bp+MENUINIT.bHeight]
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| 97 | shr al, 1
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| 98 | shr ah, 1
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| 99 | pop di ; Old AX to DI
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| 100 | add ax, di ; Add old AX to menu top left coordinates
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| 101 | pop di
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| 102 | ret
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| 103 |
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| 104 |
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| 105 | ;--------------------------------------------------------------------
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| 106 | ; MenuLocation_GetMaxTextLineLengthToAX
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| 107 | ; Parameters
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| 108 | ; SS:BP: Ptr to MENU
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| 109 | ; Returns:
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| 110 | ; AX: Maximum text line length in characters
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| 111 | ; Corrupts registers:
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| 112 | ; Nothing
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| 113 | ;--------------------------------------------------------------------
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| 114 | ALIGN JUMP_ALIGN
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| 115 | MenuLocation_GetMaxTextLineLengthToAX:
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| 116 | eMOVZX ax, [bp+MENUINIT.bWidth]
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| 117 | sub ax, BYTE MENU_HORIZONTAL_BORDER_LINES + MENU_TEXT_COLUMN_OFFSET
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| 118 | ret
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