[41] | 1 | ; Project name : Assembly Library |
---|
| 2 | ; Description : Menu loop for waiting keystrokes. |
---|
| 3 | |
---|
[376] | 4 | ; |
---|
[526] | 5 | ; XTIDE Universal BIOS and Associated Tools |
---|
| 6 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team. |
---|
[376] | 7 | ; |
---|
| 8 | ; This program is free software; you can redistribute it and/or modify |
---|
| 9 | ; it under the terms of the GNU General Public License as published by |
---|
| 10 | ; the Free Software Foundation; either version 2 of the License, or |
---|
| 11 | ; (at your option) any later version. |
---|
[526] | 12 | ; |
---|
[376] | 13 | ; This program is distributed in the hope that it will be useful, |
---|
| 14 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
| 15 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
---|
[526] | 16 | ; GNU General Public License for more details. |
---|
[376] | 17 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
---|
| 18 | ; |
---|
| 19 | |
---|
[526] | 20 | |
---|
[41] | 21 | ; Section containing code |
---|
| 22 | SECTION .text |
---|
| 23 | |
---|
| 24 | ;-------------------------------------------------------------------- |
---|
| 25 | ; MenuLoop_Enter |
---|
| 26 | ; Parameters |
---|
| 27 | ; SS:BP: Ptr to MENU |
---|
| 28 | ; Returns: |
---|
| 29 | ; Nothing |
---|
| 30 | ; Corrupts registers: |
---|
| 31 | ; AX, BX, CX, DX, SI, DI |
---|
| 32 | ;-------------------------------------------------------------------- |
---|
[369] | 33 | ALIGN MENU_JUMP_ALIGN |
---|
[41] | 34 | MenuLoop_Enter: |
---|
[58] | 35 | call KeystrokeProcessing |
---|
| 36 | call TimeoutProcessing |
---|
[189] | 37 | %ifdef MENUEVENT_IDLEPROCESSING_ENABLE |
---|
[105] | 38 | call MenuEvent_IdleProcessing ; User idle processing |
---|
[189] | 39 | %endif |
---|
[41] | 40 | test BYTE [bp+MENU.bFlags], FLG_MENU_EXIT |
---|
| 41 | jz SHORT MenuLoop_Enter |
---|
[58] | 42 | ret |
---|
[41] | 43 | |
---|
| 44 | |
---|
| 45 | ;-------------------------------------------------------------------- |
---|
[105] | 46 | ; KeystrokeProcessing |
---|
[58] | 47 | ; TimeoutProcessing |
---|
[41] | 48 | ; Parameters |
---|
| 49 | ; SS:BP: Ptr to MENU |
---|
| 50 | ; Returns: |
---|
| 51 | ; Nothing |
---|
| 52 | ; Corrupts registers: |
---|
[58] | 53 | ; All, except SS:BP |
---|
[41] | 54 | ;-------------------------------------------------------------------- |
---|
[369] | 55 | ALIGN MENU_JUMP_ALIGN |
---|
[105] | 56 | KeystrokeProcessing: |
---|
| 57 | call Keyboard_GetKeystrokeToAX |
---|
| 58 | jnz SHORT ProcessKeystrokeFromAX |
---|
| 59 | NoKeystrokeToProcess: |
---|
| 60 | ret |
---|
[41] | 61 | |
---|
[369] | 62 | ALIGN MENU_JUMP_ALIGN |
---|
[58] | 63 | TimeoutProcessing: |
---|
| 64 | call MenuTime_UpdateSelectionTimeout |
---|
[105] | 65 | jnc NoKeystrokeToProcess |
---|
[178] | 66 | mov al, CR ; Fake ENTER to select item |
---|
[105] | 67 | ; Fall to ProcessKeystrokeFromAX |
---|
[41] | 68 | |
---|
[58] | 69 | |
---|
[41] | 70 | ;-------------------------------------------------------------------- |
---|
| 71 | ; ProcessKeystrokeFromAX |
---|
| 72 | ; Parameters |
---|
| 73 | ; AL: ASCII character |
---|
| 74 | ; AH: BIOS scan code |
---|
| 75 | ; SS:BP: Ptr to MENU |
---|
| 76 | ; Returns: |
---|
[133] | 77 | ; Nothing |
---|
[41] | 78 | ; Corrupts registers: |
---|
| 79 | ; AX, BX, CX, DX, SI, DI |
---|
| 80 | ;-------------------------------------------------------------------- |
---|
[369] | 81 | ALIGN MENU_JUMP_ALIGN |
---|
[41] | 82 | ProcessKeystrokeFromAX: |
---|
[60] | 83 | xchg cx, ax |
---|
| 84 | call MenuTime_StopSelectionTimeout |
---|
| 85 | xchg ax, cx |
---|
| 86 | call .ProcessMenuSystemKeystrokeFromAX |
---|
[105] | 87 | jc SHORT NoKeystrokeToProcess |
---|
[41] | 88 | jmp MenuEvent_KeyStrokeInAX |
---|
[526] | 89 | |
---|
[41] | 90 | ;-------------------------------------------------------------------- |
---|
[60] | 91 | ; .ProcessMenuSystemKeystrokeFromAX |
---|
[41] | 92 | ; Parameters |
---|
| 93 | ; AL: ASCII character |
---|
| 94 | ; AH: BIOS scan code |
---|
| 95 | ; SS:BP: Ptr to MENU |
---|
| 96 | ; Returns: |
---|
| 97 | ; CF: Set if keystroke processed |
---|
| 98 | ; Cleared if keystroke not processed |
---|
| 99 | ; AL: ASCII character (if CF cleared) |
---|
| 100 | ; AH: BIOS scan code (if CF cleared) |
---|
| 101 | ; Corrupts registers: |
---|
| 102 | ; BX, CX, DX, SI, DI |
---|
| 103 | ;-------------------------------------------------------------------- |
---|
[369] | 104 | ALIGN MENU_JUMP_ALIGN |
---|
[60] | 105 | .ProcessMenuSystemKeystrokeFromAX: |
---|
[492] | 106 | %ifndef MENU_NO_ESC |
---|
[178] | 107 | cmp al, ESC |
---|
[41] | 108 | je SHORT .LeaveMenuWithoutSelectingItem |
---|
[492] | 109 | %endif |
---|
[178] | 110 | cmp al, CR |
---|
[41] | 111 | je SHORT .SelectItem |
---|
| 112 | |
---|
| 113 | test BYTE [bp+MENU.bFlags], FLG_MENU_USER_HANDLES_SCROLLING |
---|
| 114 | jz SHORT MenuLoop_ProcessScrollingKeysFromAX |
---|
[133] | 115 | ret ; Return with CF cleared since keystroke not processed |
---|
[41] | 116 | |
---|
[526] | 117 | %ifndef MENU_NO_ESC |
---|
[369] | 118 | ALIGN MENU_JUMP_ALIGN |
---|
[41] | 119 | .LeaveMenuWithoutSelectingItem: |
---|
[58] | 120 | call MenuEvent_ExitMenu |
---|
| 121 | jnc SHORT .CancelMenuExit |
---|
[41] | 122 | call MenuInit_CloseMenuWindow |
---|
[52] | 123 | mov WORD [bp+MENUINIT.wHighlightedItem], NO_ITEM_HIGHLIGHTED |
---|
[58] | 124 | .CancelMenuExit: |
---|
[41] | 125 | stc |
---|
| 126 | ret |
---|
[492] | 127 | %endif |
---|
[526] | 128 | |
---|
[369] | 129 | ALIGN MENU_JUMP_ALIGN |
---|
[41] | 130 | .SelectItem: |
---|
[52] | 131 | mov cx, [bp+MENUINIT.wHighlightedItem] |
---|
[41] | 132 | call MenuEvent_ItemSelectedFromCX |
---|
| 133 | stc |
---|
| 134 | ret |
---|
| 135 | |
---|
| 136 | |
---|
| 137 | ;-------------------------------------------------------------------- |
---|
| 138 | ; MenuLoop_ProcessScrollingKeysFromAX |
---|
| 139 | ; Parameters |
---|
| 140 | ; AL: ASCII character |
---|
| 141 | ; AH: BIOS scan code |
---|
| 142 | ; SS:BP: Ptr to MENU |
---|
| 143 | ; Returns: |
---|
| 144 | ; CF: Set if keystroke processed |
---|
| 145 | ; Cleared if keystroke not processed |
---|
| 146 | ; AL: ASCII character (if CF cleared) |
---|
| 147 | ; AH: BIOS scan code (if CF cleared) |
---|
| 148 | ; Corrupts registers: |
---|
| 149 | ; BX, CX, DX, SI, DI |
---|
| 150 | ;-------------------------------------------------------------------- |
---|
[369] | 151 | ALIGN MENU_JUMP_ALIGN |
---|
[41] | 152 | MenuLoop_ProcessScrollingKeysFromAX: |
---|
[178] | 153 | xchg ah, al |
---|
| 154 | cmp al, MENU_KEY_PGUP |
---|
[41] | 155 | je SHORT .ChangeToPreviousPage |
---|
[178] | 156 | cmp al, MENU_KEY_PGDN |
---|
[41] | 157 | je SHORT .ChangeToNextPage |
---|
[178] | 158 | cmp al, MENU_KEY_HOME |
---|
[41] | 159 | je SHORT .SelectFirstItem |
---|
[178] | 160 | cmp al, MENU_KEY_END |
---|
[41] | 161 | je SHORT .SelectLastItem |
---|
| 162 | |
---|
[178] | 163 | cmp al, MENU_KEY_UP |
---|
[41] | 164 | je SHORT .DecrementSelectedItem |
---|
[178] | 165 | cmp al, MENU_KEY_DOWN |
---|
[41] | 166 | je SHORT .IncrementSelectedItem |
---|
| 167 | clc ; Clear CF since keystroke not processed |
---|
[178] | 168 | xchg ah, al |
---|
[41] | 169 | ret |
---|
| 170 | |
---|
[369] | 171 | ALIGN MENU_JUMP_ALIGN |
---|
[41] | 172 | .ChangeToPreviousPage: |
---|
| 173 | call MenuScrollbars_GetMaxVisibleItemsOnPageToCX |
---|
| 174 | xchg ax, cx |
---|
| 175 | neg ax |
---|
[52] | 176 | mov cx, [bp+MENUINIT.wHighlightedItem] |
---|
[41] | 177 | add cx, ax |
---|
| 178 | jge SHORT .MoveHighlightedItemByAX ; No rotation for PgUp |
---|
| 179 | ; Fall to .SelectFirstItem |
---|
[369] | 180 | ALIGN MENU_JUMP_ALIGN |
---|
[41] | 181 | .SelectFirstItem: |
---|
[52] | 182 | mov ax, [bp+MENUINIT.wHighlightedItem] |
---|
[41] | 183 | neg ax |
---|
| 184 | jmp SHORT .MoveHighlightedItemByAX |
---|
| 185 | |
---|
[369] | 186 | ALIGN MENU_JUMP_ALIGN |
---|
[41] | 187 | .ChangeToNextPage: |
---|
| 188 | call MenuScrollbars_GetMaxVisibleItemsOnPageToCX |
---|
| 189 | xchg ax, cx |
---|
[52] | 190 | mov cx, [bp+MENUINIT.wHighlightedItem] |
---|
[41] | 191 | add cx, ax |
---|
| 192 | cmp cx, [bp+MENUINIT.wItems] |
---|
| 193 | jb SHORT .MoveHighlightedItemByAX ; No rotation for PgDn |
---|
| 194 | ; Fall to .SelectLastItem |
---|
[369] | 195 | ALIGN MENU_JUMP_ALIGN |
---|
[41] | 196 | .SelectLastItem: |
---|
[178] | 197 | stc |
---|
[41] | 198 | mov ax, [bp+MENUINIT.wItems] |
---|
[178] | 199 | sbb ax, [bp+MENUINIT.wHighlightedItem] |
---|
[41] | 200 | jmp SHORT .MoveHighlightedItemByAX |
---|
| 201 | |
---|
[369] | 202 | ALIGN MENU_JUMP_ALIGN |
---|
[41] | 203 | .DecrementSelectedItem: |
---|
[581] | 204 | mov al, -1 |
---|
| 205 | SKIP2B cx |
---|
[41] | 206 | .IncrementSelectedItem: |
---|
[581] | 207 | mov al, 1 |
---|
| 208 | cbw |
---|
[369] | 209 | ALIGN MENU_JUMP_ALIGN |
---|
[41] | 210 | .MoveHighlightedItemByAX: |
---|
| 211 | call MenuScrollbars_MoveHighlightedItemByAX |
---|
| 212 | stc |
---|
| 213 | ret |
---|