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538 | mauro | 1 | /* |
2 | * Project: S.Ha.R.K. |
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3 | * |
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4 | * Coordinators: |
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5 | * Giorgio Buttazzo <giorgio@sssup.it> |
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6 | * Paolo Gai <pj@gandalf.sssup.it> |
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7 | * |
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8 | * Authors : |
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9 | * Paolo Gai <pj@gandalf.sssup.it> |
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10 | * Massimiliano Giorgi <massy@gandalf.sssup.it> |
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11 | * Luca Abeni <luca@gandalf.sssup.it> |
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12 | * Mauro Marinoni <mauro.marinoni@unipv.it> |
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13 | * (see the web pages for full authors list) |
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14 | * |
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15 | * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy) |
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16 | * |
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17 | * http://www.sssup.it |
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18 | * http://retis.sssup.it |
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19 | * http://shark.sssup.it |
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20 | */ |
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21 | |||
22 | /* |
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23 | * Copyright (C) 2000 Paolo Gai |
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24 | * |
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25 | * This program is free software; you can redistribute it and/or modify |
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26 | * it under the terms of the GNU General Public License as published by |
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27 | * the Free Software Foundation; either version 2 of the License, or |
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28 | * (at your option) any later version. |
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29 | * |
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30 | * This program is distributed in the hope that it will be useful, |
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31 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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32 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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33 | * GNU General Public License for more details. |
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34 | * |
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35 | * You should have received a copy of the GNU General Public License |
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36 | * along with this program; if not, write to the Free Software |
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37 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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38 | * |
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39 | */ |
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40 | |||
41 | /* |
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42 | * |
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43 | * Auto Pointer management |
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44 | * |
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45 | */ |
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46 | |||
47 | #include <kernel/kern.h> |
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48 | #include <modules/sem.h> |
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49 | |||
50 | #include "../include/drivers/shark_input26.h" |
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51 | #include "../include/drivers/shark_mouse26.h" |
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52 | |||
53 | //#define CURTXT_DEBUG |
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54 | |||
55 | /* these variables are managed by this module but MUST be declared |
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56 | * into shark_mouse.c to prevent implicit inclusion of this module |
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57 | * when a user link the mouse library |
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58 | */ |
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59 | extern MOUSE_HANDLER show_mouse_handler; |
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60 | extern MOUSE_HANDLER user_mouse_handler; |
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61 | |||
62 | /* a mutex semaphore */ |
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63 | static sem_t mutex=-1; |
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64 | |||
65 | /* Setup function */ |
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66 | int _mouse_cursor_init(int cmd, void(*my_show_cursor)(int, int), void(*my_restore_cursor)(int, int)); |
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67 | |||
68 | /* |
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69 | * |
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70 | * autocursor mouse handler |
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71 | * |
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72 | */ |
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73 | |||
74 | /* >=0 hide cursor; <0 show cursor */ |
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75 | static int mouse_cursor_state = 0; |
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76 | |||
77 | /* mouse status */ |
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78 | static int autocursormode = 0; |
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79 | |||
80 | /* saved mouse_position */ |
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81 | static int saved_x, saved_y; |
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82 | |||
83 | static void dummy(int x,int y){} |
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84 | |||
85 | static void (*show_cursor)(int x, int y) = dummy; |
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86 | static void (*restore_cursor)(int x, int y) = dummy; |
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87 | |||
88 | /* those are the 4 mouse handlers */ |
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89 | /* AUTOOFF -> call the user handler with no mouse displayed */ |
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90 | /* WITHOUTSEM -> does not use a mutex semaphore */ |
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91 | |||
92 | /* with no flags */ |
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93 | static void autocursor_mouse_handler_1(MOUSE_EVT *event) |
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94 | { |
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95 | #ifdef CURTXT_DEBUG |
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96 | printk(KERN_DEBUG "mcurtxt.c: autocursor_mouse_handler_1\n"); |
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97 | #endif |
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98 | |||
99 | if (user_mouse_handler != NULL) |
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100 | user_mouse_handler(event); |
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101 | |||
102 | sem_wait(&mutex); |
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103 | if ( (mouse_cursor_state < 0) && (event->x != saved_x || event->y != saved_y)) { |
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104 | restore_cursor(saved_x, saved_y); |
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105 | saved_x = event->x; |
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106 | saved_y = event->y; |
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107 | show_cursor(saved_x, saved_y); |
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108 | } |
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109 | sem_post(&mutex); |
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110 | } |
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111 | |||
112 | /* with WITHOUTSEM flag*/ |
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113 | static void autocursor_mouse_handler_2(MOUSE_EVT *event) |
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114 | { |
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115 | #ifdef CURTXT_DEBUG |
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116 | printk(KERN_DEBUG "mcurtxt.c: autocursor_mouse_handler_2\n"); |
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117 | #endif |
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118 | if (user_mouse_handler != NULL) |
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119 | user_mouse_handler(event); |
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120 | |||
121 | if ( (mouse_cursor_state < 0) && (event->x != saved_x || event->y != saved_y)) { |
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122 | restore_cursor(saved_x, saved_y); |
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123 | saved_x = event->x; |
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124 | saved_y = event->y; |
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125 | show_cursor(saved_x, saved_y); |
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126 | } |
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127 | } |
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128 | |||
129 | /* with AUTOOFF flag*/ |
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130 | static void autocursor_mouse_handler_3(MOUSE_EVT *event) |
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131 | { |
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132 | #ifdef CURTXT_DEBUG |
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133 | printk(KERN_DEBUG "mcurtxt.c: autocursor_mouse_handler_3\n"); |
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134 | #endif |
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135 | sem_wait(&mutex); |
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136 | |||
137 | if (mouse_cursor_state < 0) { |
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138 | restore_cursor(saved_x, saved_y); |
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139 | saved_x = event->x; |
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140 | saved_y = event->y; |
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141 | if (user_mouse_handler != NULL) |
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142 | user_mouse_handler(event); |
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143 | show_cursor(saved_x, saved_y); |
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144 | } else if (user_mouse_handler != NULL) |
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145 | user_mouse_handler(event); |
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146 | |||
147 | sem_post(&mutex); |
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148 | } |
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149 | |||
150 | /* with WITHOUTSEM & AUTOOFF flags */ |
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151 | static void autocursor_mouse_handler_4(MOUSE_EVT *event) |
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152 | { |
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153 | #ifdef CURTXT_DEBUG |
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154 | printk(KERN_DEBUG "mcurtxt.c: autocursor_mouse_handler_4\n"); |
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155 | #endif |
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156 | if (mouse_cursor_state < 0) { |
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157 | restore_cursor(saved_x, saved_y); |
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158 | saved_x = event->x; |
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159 | saved_y = event->y; |
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160 | if (user_mouse_handler != NULL) |
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161 | user_mouse_handler(event); |
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162 | show_cursor(saved_x, saved_y); |
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163 | } else if (user_mouse_handler != NULL) |
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164 | user_mouse_handler(event); |
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165 | } |
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166 | |||
167 | /* -------------- |
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168 | * TXT management |
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169 | * -------------- |
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170 | */ |
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171 | |||
172 | /* text cursor shape */ |
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173 | #define DEFAULTTXTSHAPE 0x7700ffff |
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174 | static DWORD saved_txtshape = DEFAULTTXTSHAPE; |
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175 | static BYTE attr_andmask, attr_xormask; |
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176 | static BYTE c_andmask, c_xormask; |
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177 | |||
178 | /* saved values */ |
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179 | static BYTE saved_attr, saved_c; |
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180 | |||
181 | /* show txt cursor */ |
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182 | void show_txt_cursor(int x, int y) |
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183 | { |
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184 | int attr,c; |
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185 | |||
186 | getc_xy(x, y, &saved_attr, &saved_c); |
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187 | attr = (saved_attr & attr_andmask) ^ attr_xormask; |
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188 | c = (saved_c & c_andmask) ^ c_xormask; |
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189 | putc_xy(x, y, attr, c); |
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190 | } |
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191 | |||
192 | /* restore txt cursor */ |
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193 | static void restore_txt_cursor(int x, int y) |
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194 | { |
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195 | putc_xy(x, y, saved_attr, saved_c); |
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196 | } |
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197 | |||
198 | /* define text shape */ |
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199 | int mouse_txtshape(DWORD img) |
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200 | { |
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201 | int cond; |
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202 | |||
203 | if (img == DEFAULT) |
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204 | img = DEFAULTTXTSHAPE; |
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205 | |||
206 | cond = ( (autocursormode & STATUSMASK) == ENABLE && (autocursormode & TXTCURSOR) == TXTCURSOR ); |
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207 | |||
208 | if (cond) |
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209 | restore_txt_cursor(saved_x, saved_y); |
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210 | |||
211 | saved_txtshape = img; |
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212 | c_andmask = img & 0xff; |
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213 | attr_andmask = (img & 0xff00) >> 8; |
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214 | c_xormask = (img & 0xff0000) >> 16; |
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215 | attr_xormask = (img & 0xff000000) >> 24; |
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216 | |||
217 | #ifdef CURTXT_DEBUG |
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218 | printk(KERN_DEBUG "MouseTxt_Shape: %x %x %x %x\n", c_andmask, attr_andmask, c_xormask, attr_xormask); |
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219 | #endif |
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220 | if (cond) |
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221 | show_txt_cursor(saved_x, saved_y); |
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222 | |||
223 | return 0; |
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224 | } |
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225 | |||
226 | /* |
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227 | * User interface to autocursor functions |
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228 | */ |
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229 | |||
230 | /* display the cursor */ |
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231 | #define MOUSE_ON() { \ |
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232 | int unused; \ |
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233 | unsigned long lunused; \ |
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234 | mouse_cursor_state--; \ |
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235 | if (mouse_cursor_state == -1) { \ |
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236 | mouse_getpos(&saved_x, &saved_y, &unused, &lunused); \ |
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237 | show_cursor(saved_x, saved_y); \ |
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238 | } \ |
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239 | } |
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240 | |||
241 | static void mouse_on_sem(void) |
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242 | { |
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243 | sem_wait(&mutex); |
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244 | MOUSE_ON(); |
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245 | sem_post(&mutex); |
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246 | } |
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247 | |||
248 | static void mouse_on_nosem(void) |
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249 | { |
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250 | MOUSE_ON(); |
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251 | } |
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252 | |||
253 | void (*mouse_on)(void)=mouse_on_nosem; |
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254 | |||
255 | /* hide the cursor */ |
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256 | #define MOUSE_OFF() { \ |
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257 | mouse_cursor_state++; \ |
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258 | if (mouse_cursor_state == 0) \ |
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259 | restore_cursor(saved_x, saved_y); \ |
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260 | } |
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261 | |||
262 | void mouse_off_sem(void) |
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263 | { |
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264 | sem_wait(&mutex); |
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265 | MOUSE_OFF(); |
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266 | sem_post(&mutex); |
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267 | } |
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268 | |||
269 | void mouse_off_nosem(void) |
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270 | { |
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271 | MOUSE_OFF(); |
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272 | } |
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273 | |||
274 | void (*mouse_off)(void) = mouse_off_nosem; |
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275 | |||
276 | static MOUSE_HANDLER wich_handler(int cmd) |
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277 | { |
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278 | if ( ((cmd & WITHOUTSEM) == WITHOUTSEM) && ((cmd & AUTOOFF) == AUTOOFF) ) |
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279 | return autocursor_mouse_handler_4; |
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280 | if ((cmd & WITHOUTSEM) == WITHOUTSEM) |
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281 | return autocursor_mouse_handler_2; |
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282 | if ((cmd & AUTOOFF) == AUTOOFF) |
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283 | return autocursor_mouse_handler_3; |
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284 | return autocursor_mouse_handler_1; |
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285 | } |
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286 | |||
287 | int mouse_txtcursor(int cmd) |
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288 | { |
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289 | mouse_txtshape(saved_txtshape); |
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290 | return _mouse_cursor_init(cmd|TXTCURSOR, show_txt_cursor, restore_txt_cursor); |
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291 | } |
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292 | |||
293 | /* Generic functions, both for text & graphics mode */ |
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294 | |||
295 | int _mouse_cursor_init(int cmd, void(*my_show_cursor)(int, int), void(*my_restore_cursor)(int, int)) |
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296 | { |
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297 | if (mutex == -1) { |
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298 | if (sem_init(&mutex, 0, 1) == -1) |
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299 | return -1; |
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300 | } |
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301 | |||
302 | #ifdef CURTXT_DEBUG |
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303 | printk(KERN_DEBUG "mouse_cursor_init: command %x\n", cmd); |
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304 | #endif |
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305 | |||
306 | switch (cmd & STATUSMASK) { |
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307 | case DISABLE: |
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308 | //show_mouse_handler = user_mouse_handler; |
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309 | show_mouse_handler = NULL; |
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310 | restore_cursor(saved_x, saved_y); |
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311 | show_cursor = dummy; |
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312 | restore_cursor = dummy; |
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313 | mouse_cursor_state = 0; |
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314 | break; |
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315 | case ENABLE: |
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316 | restore_cursor(saved_x, saved_y); |
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317 | restore_cursor = my_restore_cursor; |
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318 | show_cursor = my_show_cursor; |
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319 | if ((autocursormode & STATUSMASK) == DISABLE) { |
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320 | //user_mouse_handler = show_mouse_handler; |
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321 | show_mouse_handler = wich_handler(cmd); |
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322 | } |
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323 | mouse_cursor_state = -1; |
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324 | break; |
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325 | default: |
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326 | return -1; |
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327 | } |
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328 | |||
329 | autocursormode = cmd; |
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330 | |||
331 | if ((autocursormode & STATUSMASK) == ENABLE) { |
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332 | if ((cmd & WITHOUTSEM) == WITHOUTSEM) { |
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333 | mouse_on = mouse_on_nosem; |
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334 | mouse_off = mouse_off_nosem; |
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335 | } else { |
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336 | mouse_on = mouse_on_sem; |
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337 | mouse_off = mouse_off_sem; |
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338 | } |
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339 | } |
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340 | |||
341 | return 0; |
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342 | } |
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343 | |||
344 | void _mouse_cursor_getposition(int *xptr, int *yptr) |
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345 | { |
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346 | *xptr = saved_x; |
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347 | *yptr = saved_y; |
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348 | } |