[41] | 1 | ; Project name : Assembly Library |
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| 2 | ; Description : Menu loop for waiting keystrokes. |
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| 3 | |
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[376] | 4 | ; |
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| 5 | ; XTIDE Universal BIOS and Associated Tools |
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| 6 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 by XTIDE Universal BIOS Team. |
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| 7 | ; |
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| 8 | ; This program is free software; you can redistribute it and/or modify |
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| 9 | ; it under the terms of the GNU General Public License as published by |
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| 10 | ; the Free Software Foundation; either version 2 of the License, or |
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| 11 | ; (at your option) any later version. |
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| 12 | ; |
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| 13 | ; This program is distributed in the hope that it will be useful, |
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| 14 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 16 | ; GNU General Public License for more details. |
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| 17 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
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| 18 | ; |
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| 19 | |
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| 20 | |
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[41] | 21 | ; Section containing code |
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| 22 | SECTION .text |
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| 23 | |
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| 24 | ;-------------------------------------------------------------------- |
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| 25 | ; MenuLoop_Enter |
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| 26 | ; Parameters |
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| 27 | ; SS:BP: Ptr to MENU |
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| 28 | ; Returns: |
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| 29 | ; Nothing |
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| 30 | ; Corrupts registers: |
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| 31 | ; AX, BX, CX, DX, SI, DI |
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| 32 | ;-------------------------------------------------------------------- |
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[369] | 33 | ALIGN MENU_JUMP_ALIGN |
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[41] | 34 | MenuLoop_Enter: |
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[58] | 35 | call KeystrokeProcessing |
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| 36 | call TimeoutProcessing |
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[189] | 37 | %ifdef MENUEVENT_IDLEPROCESSING_ENABLE |
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[105] | 38 | call MenuEvent_IdleProcessing ; User idle processing |
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[189] | 39 | %endif |
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[41] | 40 | test BYTE [bp+MENU.bFlags], FLG_MENU_EXIT |
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| 41 | jz SHORT MenuLoop_Enter |
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[58] | 42 | ret |
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[41] | 43 | |
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| 44 | |
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| 45 | ;-------------------------------------------------------------------- |
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[105] | 46 | ; KeystrokeProcessing |
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[58] | 47 | ; TimeoutProcessing |
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[41] | 48 | ; Parameters |
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| 49 | ; SS:BP: Ptr to MENU |
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| 50 | ; Returns: |
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| 51 | ; Nothing |
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| 52 | ; Corrupts registers: |
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[58] | 53 | ; All, except SS:BP |
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[41] | 54 | ;-------------------------------------------------------------------- |
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[369] | 55 | ALIGN MENU_JUMP_ALIGN |
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[105] | 56 | KeystrokeProcessing: |
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| 57 | call Keyboard_GetKeystrokeToAX |
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| 58 | jnz SHORT ProcessKeystrokeFromAX |
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| 59 | NoKeystrokeToProcess: |
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| 60 | ret |
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[41] | 61 | |
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[369] | 62 | ALIGN MENU_JUMP_ALIGN |
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[58] | 63 | TimeoutProcessing: |
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| 64 | call MenuTime_UpdateSelectionTimeout |
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[105] | 65 | jnc NoKeystrokeToProcess |
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[178] | 66 | mov al, CR ; Fake ENTER to select item |
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[105] | 67 | ; Fall to ProcessKeystrokeFromAX |
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[41] | 68 | |
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[58] | 69 | |
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[41] | 70 | ;-------------------------------------------------------------------- |
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| 71 | ; ProcessKeystrokeFromAX |
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| 72 | ; Parameters |
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| 73 | ; AL: ASCII character |
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| 74 | ; AH: BIOS scan code |
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| 75 | ; SS:BP: Ptr to MENU |
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| 76 | ; Returns: |
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[133] | 77 | ; Nothing |
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[41] | 78 | ; Corrupts registers: |
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| 79 | ; AX, BX, CX, DX, SI, DI |
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| 80 | ;-------------------------------------------------------------------- |
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[369] | 81 | ALIGN MENU_JUMP_ALIGN |
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[41] | 82 | ProcessKeystrokeFromAX: |
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[60] | 83 | xchg cx, ax |
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| 84 | call MenuTime_StopSelectionTimeout |
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| 85 | xchg ax, cx |
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| 86 | call .ProcessMenuSystemKeystrokeFromAX |
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[492] | 87 | %ifdef MENUEVENT_KeyStrokeInAX |
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[105] | 88 | jc SHORT NoKeystrokeToProcess |
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[41] | 89 | jmp MenuEvent_KeyStrokeInAX |
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[492] | 90 | %else |
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| 91 | jmp SHORT NoKeystrokeToProcess |
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| 92 | %endif |
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| 93 | |
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[41] | 94 | ;-------------------------------------------------------------------- |
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[60] | 95 | ; .ProcessMenuSystemKeystrokeFromAX |
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[41] | 96 | ; Parameters |
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| 97 | ; AL: ASCII character |
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| 98 | ; AH: BIOS scan code |
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| 99 | ; SS:BP: Ptr to MENU |
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| 100 | ; Returns: |
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| 101 | ; CF: Set if keystroke processed |
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| 102 | ; Cleared if keystroke not processed |
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| 103 | ; AL: ASCII character (if CF cleared) |
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| 104 | ; AH: BIOS scan code (if CF cleared) |
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| 105 | ; Corrupts registers: |
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| 106 | ; BX, CX, DX, SI, DI |
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| 107 | ;-------------------------------------------------------------------- |
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[369] | 108 | ALIGN MENU_JUMP_ALIGN |
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[60] | 109 | .ProcessMenuSystemKeystrokeFromAX: |
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[492] | 110 | %ifndef MENU_NO_ESC |
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[178] | 111 | cmp al, ESC |
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[41] | 112 | je SHORT .LeaveMenuWithoutSelectingItem |
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[492] | 113 | %endif |
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[178] | 114 | cmp al, CR |
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[41] | 115 | je SHORT .SelectItem |
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| 116 | |
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| 117 | test BYTE [bp+MENU.bFlags], FLG_MENU_USER_HANDLES_SCROLLING |
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| 118 | jz SHORT MenuLoop_ProcessScrollingKeysFromAX |
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[133] | 119 | ret ; Return with CF cleared since keystroke not processed |
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[41] | 120 | |
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[492] | 121 | %ifndef MENU_NO_ESC |
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[369] | 122 | ALIGN MENU_JUMP_ALIGN |
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[41] | 123 | .LeaveMenuWithoutSelectingItem: |
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[58] | 124 | call MenuEvent_ExitMenu |
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| 125 | jnc SHORT .CancelMenuExit |
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[41] | 126 | call MenuInit_CloseMenuWindow |
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[52] | 127 | mov WORD [bp+MENUINIT.wHighlightedItem], NO_ITEM_HIGHLIGHTED |
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[58] | 128 | .CancelMenuExit: |
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[41] | 129 | stc |
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| 130 | ret |
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[492] | 131 | %endif |
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| 132 | |
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[369] | 133 | ALIGN MENU_JUMP_ALIGN |
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[41] | 134 | .SelectItem: |
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[52] | 135 | mov cx, [bp+MENUINIT.wHighlightedItem] |
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[41] | 136 | call MenuEvent_ItemSelectedFromCX |
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| 137 | stc |
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| 138 | ret |
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| 139 | |
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| 140 | |
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| 141 | ;-------------------------------------------------------------------- |
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| 142 | ; MenuLoop_ProcessScrollingKeysFromAX |
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| 143 | ; Parameters |
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| 144 | ; AL: ASCII character |
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| 145 | ; AH: BIOS scan code |
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| 146 | ; SS:BP: Ptr to MENU |
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| 147 | ; Returns: |
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| 148 | ; CF: Set if keystroke processed |
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| 149 | ; Cleared if keystroke not processed |
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| 150 | ; AL: ASCII character (if CF cleared) |
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| 151 | ; AH: BIOS scan code (if CF cleared) |
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| 152 | ; Corrupts registers: |
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| 153 | ; BX, CX, DX, SI, DI |
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| 154 | ;-------------------------------------------------------------------- |
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[369] | 155 | ALIGN MENU_JUMP_ALIGN |
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[41] | 156 | MenuLoop_ProcessScrollingKeysFromAX: |
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[178] | 157 | xchg ah, al |
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| 158 | cmp al, MENU_KEY_PGUP |
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[41] | 159 | je SHORT .ChangeToPreviousPage |
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[178] | 160 | cmp al, MENU_KEY_PGDN |
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[41] | 161 | je SHORT .ChangeToNextPage |
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[178] | 162 | cmp al, MENU_KEY_HOME |
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[41] | 163 | je SHORT .SelectFirstItem |
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[178] | 164 | cmp al, MENU_KEY_END |
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[41] | 165 | je SHORT .SelectLastItem |
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| 166 | |
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[178] | 167 | cmp al, MENU_KEY_UP |
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[41] | 168 | je SHORT .DecrementSelectedItem |
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[178] | 169 | cmp al, MENU_KEY_DOWN |
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[41] | 170 | je SHORT .IncrementSelectedItem |
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| 171 | clc ; Clear CF since keystroke not processed |
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[178] | 172 | xchg ah, al |
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[41] | 173 | ret |
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| 174 | |
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[369] | 175 | ALIGN MENU_JUMP_ALIGN |
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[41] | 176 | .ChangeToPreviousPage: |
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| 177 | call MenuScrollbars_GetMaxVisibleItemsOnPageToCX |
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| 178 | xchg ax, cx |
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| 179 | neg ax |
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[52] | 180 | mov cx, [bp+MENUINIT.wHighlightedItem] |
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[41] | 181 | add cx, ax |
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| 182 | jge SHORT .MoveHighlightedItemByAX ; No rotation for PgUp |
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| 183 | ; Fall to .SelectFirstItem |
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[369] | 184 | ALIGN MENU_JUMP_ALIGN |
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[41] | 185 | .SelectFirstItem: |
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[52] | 186 | mov ax, [bp+MENUINIT.wHighlightedItem] |
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[41] | 187 | neg ax |
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| 188 | jmp SHORT .MoveHighlightedItemByAX |
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| 189 | |
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[369] | 190 | ALIGN MENU_JUMP_ALIGN |
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[41] | 191 | .ChangeToNextPage: |
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| 192 | call MenuScrollbars_GetMaxVisibleItemsOnPageToCX |
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| 193 | xchg ax, cx |
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[52] | 194 | mov cx, [bp+MENUINIT.wHighlightedItem] |
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[41] | 195 | add cx, ax |
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| 196 | cmp cx, [bp+MENUINIT.wItems] |
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| 197 | jb SHORT .MoveHighlightedItemByAX ; No rotation for PgDn |
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| 198 | ; Fall to .SelectLastItem |
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[369] | 199 | ALIGN MENU_JUMP_ALIGN |
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[41] | 200 | .SelectLastItem: |
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[178] | 201 | stc |
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[41] | 202 | mov ax, [bp+MENUINIT.wItems] |
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[178] | 203 | sbb ax, [bp+MENUINIT.wHighlightedItem] |
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[41] | 204 | jmp SHORT .MoveHighlightedItemByAX |
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| 205 | |
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[369] | 206 | ALIGN MENU_JUMP_ALIGN |
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[41] | 207 | .DecrementSelectedItem: |
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| 208 | mov ax, -1 |
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[178] | 209 | SKIP2B cx ; mov cx, <next instruction> |
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[41] | 210 | .IncrementSelectedItem: |
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[178] | 211 | mov al, 1 ; AH is already 0 |
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[369] | 212 | ALIGN MENU_JUMP_ALIGN |
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[41] | 213 | .MoveHighlightedItemByAX: |
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| 214 | call MenuScrollbars_MoveHighlightedItemByAX |
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| 215 | stc |
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| 216 | ret |
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