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1 /** |
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2 * Spacenav lib hack |
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3 * Copyright © 2019 František Kučera (Frantovo.cz, GlobalCode.info) |
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4 * |
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5 * This program is free software: you can redistribute it and/or modify |
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6 * it under the terms of the GNU General Public License as published by |
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7 * the Free Software Foundation, either version 3 of the License, or |
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8 * (at your option) any later version. |
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9 * |
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10 * This program is distributed in the hope that it will be useful, |
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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13 * GNU General Public License for more details. |
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14 * |
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15 * You should have received a copy of the GNU General Public License |
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16 * along with this program. If not, see <http://www.gnu.org/licenses/>. |
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17 */ |
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18 #define _GNU_SOURCE |
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19 |
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20 #include <stdio.h> |
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21 #include <stdint.h> |
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22 #include <dlfcn.h> |
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23 #include <stdlib.h> |
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24 #include <pthread.h> |
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25 |
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26 #include <X11/Xlib.h> |
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27 #include <spnav.h> |
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28 |
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29 static Display* spacenav_hack_dpy; |
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30 static Window spacenav_hack_win; |
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31 |
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32 static pthread_t spacenav_hack_thread; |
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33 |
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34 // from proto_x11.c (spacenavd) |
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35 static Atom xa_event_motion, xa_event_bpress, xa_event_brelease, xa_event_cmd; |
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36 static float x11_sens = 1.0; |
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37 |
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38 /** |
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39 * This function is based on proto_x11.c (spacenavd) written by: |
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40 * Copyright (C) 2007-2019 John Tsiombikas <nuclear@member.fsf.org> |
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41 * and published under GNU GPLv3+ |
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42 * |
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43 * @param ev |
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44 * @param dpy |
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45 * @param win |
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46 */ |
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47 static void send_xevent(spnav_event *ev, Display* dpy, Window win) { |
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48 int i; |
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49 XEvent xevent; |
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50 |
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51 if (!dpy) return; |
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52 |
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53 // if(setjmp(jbuf)) return; |
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54 |
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55 xevent.type = ClientMessage; |
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56 xevent.xclient.send_event = False; |
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57 xevent.xclient.display = dpy; |
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58 xevent.xclient.window = win; |
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59 |
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60 switch (ev->type) { |
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61 case SPNAV_EVENT_MOTION: |
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62 xevent.xclient.message_type = xa_event_motion; |
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63 xevent.xclient.format = 16; |
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64 |
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65 for (i = 0; i < 6; i++) { |
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66 float val = (float) ev->motion.data[i] * x11_sens; |
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67 xevent.xclient.data.s[i + 2] = (short) val; |
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68 } |
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69 xevent.xclient.data.s[0] = xevent.xclient.data.s[1] = 0; |
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70 xevent.xclient.data.s[8] = ev->motion.period; |
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71 break; |
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72 |
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73 case SPNAV_EVENT_BUTTON: |
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74 xevent.xclient.message_type = ev->button.press ? xa_event_bpress : xa_event_brelease; |
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75 xevent.xclient.format = 16; |
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76 xevent.xclient.data.s[2] = ev->button.bnum; |
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77 break; |
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78 |
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79 default: |
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80 break; |
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81 } |
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82 |
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83 XSendEvent(dpy, win, False, 0, &xevent); |
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84 XFlush(dpy); |
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85 } |
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86 |
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87 static void* spacenav_hack_translate_events(void* arg) { |
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88 pthread_setname_np(pthread_self(), "spacenav-hack"); // can be found with: ps H -o 'pid tid cmd comm' |
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89 spnav_event event; |
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90 while (1) { |
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91 if (spnav_wait_event(&event)) { |
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92 //fprintf(stderr, "spnav-lib-hack: got event\n"); |
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93 XLockDisplay(spacenav_hack_dpy); |
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94 send_xevent(&event, spacenav_hack_dpy, spacenav_hack_win); |
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95 XUnlockDisplay(spacenav_hack_dpy); |
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96 } |
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97 } |
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98 } |
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99 |
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100 int spnav_x11_open(Display* dpy, Window win) { |
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101 spacenav_hack_dpy = dpy; |
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102 spacenav_hack_win = win; |
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103 |
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104 int result = spnav_open(); |
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105 fprintf(stderr, "spnav-lib-hack: instead of spnav_x11_open(%p, 0x%lx) calling spnav_open() = %d\n", dpy, win, result); |
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106 |
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107 if (result == 0) { |
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108 xa_event_motion = XInternAtom(dpy, "MotionEvent", False); |
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109 xa_event_bpress = XInternAtom(dpy, "ButtonPressEvent", False); |
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110 xa_event_brelease = XInternAtom(dpy, "ButtonReleaseEvent", False); |
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111 xa_event_cmd = XInternAtom(dpy, "CommandEvent", False); |
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112 |
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113 XInitThreads(); |
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114 pthread_create(&spacenav_hack_thread, NULL, spacenav_hack_translate_events, NULL); |
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115 } |
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116 |
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117 return result; |
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118 } |
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119 |
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120 |
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121 |
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122 /* |
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123 int spnav_x11_event(const XEvent* xev, spnav_event* event) { |
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124 xev. |
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125 static int (*real_spnav_x11_event)(const XEvent*, spnav_event*) = NULL; |
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126 if (!real_spnav_x11_event) real_spnav_x11_event = dlsym(RTLD_NEXT, "spnav_x11_event"); |
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127 int result = real_spnav_x11_event(xev, event); |
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128 if (result == SPNAV_EVENT_MOTION || result == SPNAV_EVENT_BUTTON) fprintf(stderr, "spnav-lib-hack: spnav_x11_event() = %d\n", result); |
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129 return result; |
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130 } |
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131 */ |
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132 |
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133 |
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134 /* |
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135 int spnav_x11_open(Display* dpy, Window win) { |
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136 static int (*real_spnav_x11_open)(Display*, Window) = NULL; |
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137 if (!real_spnav_x11_open) real_spnav_x11_open = dlsym(RTLD_NEXT, "spnav_x11_open"); |
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138 int result = real_spnav_x11_open(dpy, win); |
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139 fprintf(stderr, "spnav-lib-hack: spnav_x11_open() = %d\n", result); |
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140 return result; |
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141 } |
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142 */ |
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143 |
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144 |
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145 /* |
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146 int spnav_open() { |
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147 return -1; |
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148 } |
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149 */ |
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150 |
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151 /* |
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152 int spnav_open() { |
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153 static int (*real_spnav_open)() = NULL; |
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154 if (!real_spnav_open) real_spnav_open = dlsym(RTLD_NEXT, "spnav_open"); |
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155 int result = real_spnav_open(); |
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156 // fprintf(stderr, "spnav-lib-hack: spnav_open() = %d\n", result); |
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157 return result; |
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158 } |
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159 */ |