1 | ; File name : MenuText.asm
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2 | ; Project name : Assembly Library
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3 | ; Created date : 21.7.2010
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4 | ; Last update : 28.9.2010
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5 | ; Author : Tomi Tilli
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6 | ; Description : Functions for drawing menu texts by the user.
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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 | ; MenuText_RefreshTitle
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13 | ; MenuText_RefreshInformation
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14 | ; Parameters
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15 | ; SS:BP: Ptr to MENU
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16 | ; Returns:
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17 | ; Nothing
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18 | ; Corrupts registers:
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19 | ; AX, BX, DX, SI, DI
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20 | ;--------------------------------------------------------------------
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21 | ALIGN JUMP_ALIGN
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22 | MenuText_RefreshTitle:
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23 | cmp BYTE [bp+MENUINIT.bTitleLines], 0
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24 | jz SHORT NothingToRefresh
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25 |
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26 | mov si, ATTRIBUTE_CHARS.cTitle
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27 | call AdjustDisplayContextForDrawingTexts
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28 | call MenuLocation_GetTitleTextTopLeftCoordinatesToAX
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29 | CALL_DISPLAY_LIBRARY SetCursorCoordinatesFromAX
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30 | jmp MenuEvent_RefreshTitle
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31 |
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32 | ALIGN JUMP_ALIGN
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33 | MenuText_RefreshInformation:
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34 | cmp BYTE [bp+MENUINIT.bInfoLines], 0
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35 | jz SHORT NothingToRefresh
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36 |
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37 | mov si, ATTRIBUTE_CHARS.cInformation
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38 | call AdjustDisplayContextForDrawingTexts
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39 | call MenuLocation_GetInformationTextTopLeftCoordinatesToAX
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40 | CALL_DISPLAY_LIBRARY SetCursorCoordinatesFromAX
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41 | jmp MenuEvent_RefreshInformation
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42 |
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43 |
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44 | ;--------------------------------------------------------------------
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45 | ; MenuText_RefreshAllItems
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46 | ; Parameters
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47 | ; SS:BP: Ptr to MENU
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48 | ; Returns:
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49 | ; Nothing
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50 | ; Corrupts registers:
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51 | ; AX, BX, DX, SI, DI
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52 | ;--------------------------------------------------------------------
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53 | ALIGN JUMP_ALIGN
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54 | MenuText_RefreshAllItems:
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55 | push cx
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56 |
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57 | call MenuScrollbars_GetActualVisibleItemsOnPageToCX
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58 | mov ax, [bp+MENU.wFirstVisibleItem]
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59 | ALIGN JUMP_ALIGN
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60 | .ItemRefreshLoop:
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61 | call MenuText_RefreshItemFromAX
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62 | inc ax
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63 | loop .ItemRefreshLoop
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64 |
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65 | pop cx
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66 | NothingToRefresh:
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67 | ret
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68 |
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69 | ;--------------------------------------------------------------------
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70 | ; MenuText_RefreshItemFromAX
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71 | ; Parameters
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72 | ; AX: Item to refresh
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73 | ; SS:BP: Ptr to MENU
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74 | ; Returns:
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75 | ; Nothing
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76 | ; Corrupts registers:
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77 | ; BX, DX, SI, DI
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78 | ;--------------------------------------------------------------------
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79 | ALIGN JUMP_ALIGN
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80 | MenuText_RefreshItemFromAX:
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81 | push cx
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82 | mov cx, ax ; Backup item to CX
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83 |
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84 | call MenuScrollbars_IsItemInCXonVisiblePage
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85 | jnc SHORT .InvalidItem
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86 | mov ax, cx
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87 | call MenuText_AdjustDisplayContextForDrawingItemFromAX
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88 | call MenuEvent_RefreshItemFromCX
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89 | call DrawScrollbarIfNecessary
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90 | .InvalidItem:
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91 | xchg ax, cx ; Restore AX
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92 | pop cx
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93 | ret
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94 |
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95 | ;--------------------------------------------------------------------
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96 | ; MenuText_AdjustDisplayContextForDrawingItemFromAX
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97 | ; Parameters
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98 | ; AX: Item to refresh
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99 | ; SS:BP: Ptr to MENU
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100 | ; Returns:
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101 | ; CX: Item to refresh
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102 | ; Corrupts registers:
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103 | ; AX, SI, DI
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104 | ;--------------------------------------------------------------------
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105 | ALIGN JUMP_ALIGN
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106 | MenuText_AdjustDisplayContextForDrawingItemFromAX:
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107 | mov cx, ax
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108 | call MenuLocation_GetTextCoordinatesToAXforItemInAX
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109 | CALL_DISPLAY_LIBRARY SetCursorCoordinatesFromAX
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110 | call .GetItemTextAttributeTypeToSIforItemInCX
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111 | jmp SHORT AdjustDisplayContextForDrawingTexts
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112 |
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113 | ;--------------------------------------------------------------------
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114 | ; .GetItemTextAttributeTypeToSIforItemInCX
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115 | ; Parameters
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116 | ; CX: Item to refresh
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117 | ; SS:BP: Ptr to MENU
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118 | ; Returns:
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119 | ; SI: Text attribute type (ATTRIBUTE_CHARS)
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120 | ; Corrupts registers:
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121 | ; Nothing
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122 | ;--------------------------------------------------------------------
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123 | ALIGN JUMP_ALIGN
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124 | .GetItemTextAttributeTypeToSIforItemInCX:
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125 | mov si, ATTRIBUTE_CHARS.cItem
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126 | test BYTE [bp+MENU.bFlags], FLG_MENU_NOHIGHLIGHT
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127 | jnz SHORT .ReturnAttributeTypeInSI
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128 | cmp cx, [bp+MENU.wHighlightedItem]
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129 | jne SHORT .ReturnAttributeTypeInSI
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130 | sub si, BYTE ATTRIBUTE_CHARS.cItem - ATTRIBUTE_CHARS.cHighlightedItem
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131 | ALIGN JUMP_ALIGN, ret
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132 | .ReturnAttributeTypeInSI:
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133 | ret
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134 |
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135 |
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136 | ;--------------------------------------------------------------------
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137 | ; DrawScrollbarIfNecessary
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138 | ; Parameters
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139 | ; CX: Item to refresh
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140 | ; SS:BP: Ptr to MENU
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141 | ; Returns:
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142 | ; Nothing
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143 | ; Corrupts registers:
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144 | ; AX, DX, SI, DI
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145 | ;--------------------------------------------------------------------
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146 | ALIGN JUMP_ALIGN
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147 | DrawScrollbarIfNecessary:
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148 | push cx
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149 | call .DrawSpacesBeforeScrollbarCharacter
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150 | call MenuScrollbars_AreScrollbarsNeeded
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151 | pop cx
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152 | jc SHORT .DrawScrollbarCharacter
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153 | ret
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154 |
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155 | ;--------------------------------------------------------------------
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156 | ; .DrawSpacesBeforeScrollbarCharacter
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157 | ; Parameters
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158 | ; CX: Item to refresh
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159 | ; SS:BP: Ptr to MENU
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160 | ; Returns:
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161 | ; Nothing
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162 | ; Corrupts registers:
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163 | ; AX, CX, DX, DI
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164 | ;--------------------------------------------------------------------
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165 | ALIGN JUMP_ALIGN
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166 | .DrawSpacesBeforeScrollbarCharacter:
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167 | CALL_DISPLAY_LIBRARY GetSoftwareCoordinatesToAX
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168 | xchg dx, ax ; Current coordinates to DX
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169 | mov ax, cx
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170 | call MenuLocation_GetScrollbarCoordinatesToAXforItemInAX
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171 | sub al, dl
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172 | sub al, MENU_TEXT_COLUMN_OFFSET/2
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173 |
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174 | eMOVZX cx, al
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175 | jcxz .NoSpacesNeeded
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176 | mov al, ' '
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177 | CALL_DISPLAY_LIBRARY PrintRepeatedCharacterFromALwithCountInCX
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178 | ALIGN JUMP_ALIGN, ret
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179 | .NoSpacesNeeded:
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180 | ret
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181 |
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182 | ;--------------------------------------------------------------------
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183 | ; .DrawScrollbarCharacter
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184 | ; Parameters
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185 | ; CX: Item to refresh
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186 | ; SS:BP: Ptr to MENU
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187 | ; Returns:
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188 | ; Nothing
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189 | ; Corrupts registers:
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190 | ; AX, DX, SI, DI
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191 | ;--------------------------------------------------------------------
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192 | ALIGN JUMP_ALIGN
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193 | .DrawScrollbarCharacter:
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194 | push cx
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195 |
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196 | mov si, ATTRIBUTE_CHARS.cBordersAndBackground
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197 | call MenuAttribute_SetToDisplayContextFromTypeInSI
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198 |
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199 | mov ax, cx
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200 | call MenuLocation_GetScrollbarCoordinatesToAXforItemInAX
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201 | CALL_DISPLAY_LIBRARY SetCursorCoordinatesFromAX
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202 |
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203 | mov di, cx
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204 | sub di, [bp+MENU.wFirstVisibleItem] ; Item to line
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205 | call MenuScrollbars_GetScrollCharacterToALForLineInDI
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206 | CALL_DISPLAY_LIBRARY PrintCharacterFromAL
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207 |
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208 | pop cx
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209 | ret
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210 |
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211 |
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212 | ;--------------------------------------------------------------------
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213 | ; AdjustDisplayContextForDrawingTexts
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214 | ; Parameters
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215 | ; SI: Attribute type (from ATTRIBUTE_CHARS)
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216 | ; SS:BP: Ptr to MENU
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217 | ; Returns:
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218 | ; Nothing
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219 | ; Corrupts registers:
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220 | ; AX, BX, SI, DI
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221 | ;--------------------------------------------------------------------
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222 | ALIGN JUMP_ALIGN
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223 | AdjustDisplayContextForDrawingTexts:
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224 | mov bl, ATTRIBUTES_ARE_USED
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225 | mov ax, MenuCharOut_MenuTextTeletypeOutputWithAttribute
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226 | CALL_DISPLAY_LIBRARY SetCharOutputFunctionFromAXwithAttribFlagInBL
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227 |
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228 | mov ax, bp
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229 | CALL_DISPLAY_LIBRARY SetCharacterOutputParameterFromAX
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230 |
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231 | jmp MenuAttribute_SetToDisplayContextFromTypeInSI
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