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398
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1 /* GPM (General purpose mouse) functions
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2 Copyright (C) 1997 William M. Perry <wmperry@gnu.org>
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3 Copyright (C) 1999 Free Software Foundation, Inc.
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4
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5 This file is part of XEmacs.
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6
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7 XEmacs is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
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12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with XEmacs; see the file COPYING. If not, write to
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19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 Boston, MA 02111-1307, USA. */
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21
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22 /* Synched up with: Not in FSF. */
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23
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24 /* Authors: William Perry */
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153
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25
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26 #include <config.h>
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27 #include "lisp.h"
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272
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28 #include "console.h"
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153
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29 #include "console-tty.h"
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30 #include "device.h"
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31 #include "events.h"
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32 #include "events-mod.h"
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33 #include "sysdep.h"
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398
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34 #include "commands.h"
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35 #include "lstream.h"
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36 #include "sysproc.h" /* for MAXDESC */
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37 #include "process.h"
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153
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38
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39 #ifdef HAVE_GPM
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40 #include "gpmevent.h"
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41 #include <gpm.h>
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42
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43 #if (!defined(__linux__)) /* possible under xterm */
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44 #define KG_SHIFT 0
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45 #define KG_CTRL 2
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46 #define KG_ALT 3
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47 #else
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272
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48 #include <linux/keyboard.h>
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153
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49 #endif
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50
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398
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51 extern int gpm_tried;
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52 extern void *gpm_stack;
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53
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54 static int (*orig_event_pending_p) (int);
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55 static void (*orig_next_event_cb) (Lisp_Event *);
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56
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57 static Lisp_Object gpm_event_queue;
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58 static Lisp_Object gpm_event_queue_tail;
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59
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60 struct __gpm_state {
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61 int gpm_tried;
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62 int gpm_flag;
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63 void *gpm_stack;
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64 };
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65
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66 static struct __gpm_state gpm_state_information[MAXDESC];
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67
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68 static void
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69 store_gpm_state (int fd)
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153
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70 {
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398
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71 gpm_state_information[fd].gpm_tried = gpm_tried;
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72 gpm_state_information[fd].gpm_flag = gpm_flag;
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73 gpm_state_information[fd].gpm_stack = gpm_stack;
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74 }
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75
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76 static void
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77 restore_gpm_state (int fd)
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78 {
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79 gpm_tried = gpm_state_information[fd].gpm_tried;
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80 gpm_flag = gpm_state_information[fd].gpm_flag;
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81 gpm_stack = gpm_state_information[fd].gpm_stack;
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82 gpm_consolefd = gpm_fd = fd;
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83 }
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153
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84
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398
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85 static void
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86 clear_gpm_state (int fd)
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87 {
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88 if (fd >= 0)
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89 {
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90 memset(&gpm_state_information[fd], '\0', sizeof(struct __gpm_state));
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91 }
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92 gpm_tried = gpm_flag = 1;
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93 gpm_fd = gpm_consolefd = -1;
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94 gpm_stack = NULL;
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95 }
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96
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97 static int
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98 get_process_infd (Lisp_Process *p)
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99 {
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100 Lisp_Object instr, outstr;
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101 get_process_streams (p, &instr, &outstr);
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102 assert (!NILP (instr));
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103 return filedesc_stream_fd (XLSTREAM (instr));
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104 }
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272
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105
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398
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106 DEFUN ("receive-gpm-event", Freceive_gpm_event, 0, 2, 0, /*
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107 Run GPM_GetEvent().
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108 This function is the process handler for the GPM connection.
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109 */
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110 (process, string))
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111 {
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112 Gpm_Event ev;
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113 int modifiers = 0;
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114 int button = 1;
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115 Lisp_Object fake_event;
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116 Lisp_Event *event = NULL;
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117 struct gcpro gcpro1;
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118 static int num_events;
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119
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120 CHECK_PROCESS (process);
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121
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122 restore_gpm_state (get_process_infd (XPROCESS (process)));
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123
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124 if (!Gpm_GetEvent(&ev))
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125 {
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126 warn_when_safe (Qnil, Qcritical, "Gpm_GetEvent failed - %d", gpm_fd);
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127 return(Qzero);
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128 }
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129
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130 GCPRO1(fake_event);
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272
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131
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398
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132 num_events++;
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133
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134 fake_event = Fmake_event (Qnil, Qnil);
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135 event = XEVENT(fake_event);
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136
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137 event->timestamp = 0;
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138 event->channel = Fselected_frame (Qnil); /* CONSOLE_SELECTED_FRAME (con); */
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139
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140 /* Whow, wouldn't named defines be NICE!?!?! */
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141 modifiers = 0;
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153
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142
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398
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143 if (ev.modifiers & 1) modifiers |= MOD_SHIFT;
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144 if (ev.modifiers & 2) modifiers |= MOD_META;
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145 if (ev.modifiers & 4) modifiers |= MOD_CONTROL;
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146 if (ev.modifiers & 8) modifiers |= MOD_META;
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147
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148 if (ev.buttons & GPM_B_LEFT)
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149 {
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150 button = 1;
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151 }
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152 else if (ev.buttons & GPM_B_MIDDLE)
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153 {
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154 button = 2;
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155 }
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156 else if (ev.buttons & GPM_B_RIGHT)
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157 {
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158 button = 3;
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159 }
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153
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160
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398
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161 switch (GPM_BARE_EVENTS(ev.type)) {
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162 case GPM_DOWN:
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163 case GPM_UP:
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164 event->event_type =
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165 (ev.type & GPM_DOWN) ? button_press_event : button_release_event;
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166 event->event.button.x = ev.x;
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167 event->event.button.y = ev.y;
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168 event->event.button.button = button;
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169 event->event.button.modifiers = modifiers;
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170 break;
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171 case GPM_MOVE:
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172 case GPM_DRAG:
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173 event->event_type = pointer_motion_event;
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174 event->event.motion.x = ev.x;
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175 event->event.motion.y = ev.y;
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176 event->event.motion.modifiers = modifiers;
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177 default:
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178 /* This will never happen */
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179 break;
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180 }
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181
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182 /* Handle the event */
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183 enqueue_event (fake_event, &gpm_event_queue, &gpm_event_queue_tail);
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184
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185 UNGCPRO;
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186
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187 return (Qzero);
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188 }
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189
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190 static void turn_off_gpm (char *process_name)
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191 {
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192 Lisp_Object process = Fget_process (build_string (process_name));
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193 int fd = -1;
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153
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194
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398
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195 if (NILP (process))
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196 {
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197 /* Something happened to our GPM process - fail silently */
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198 return;
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199 }
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200
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201 fd = get_process_infd (XPROCESS (process));
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202
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203 restore_gpm_state (fd);
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204
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205 Gpm_Close();
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206
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207 clear_gpm_state (fd);
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208
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209 Fdelete_process (build_string (process_name));
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210 }
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211
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212 #ifdef TIOCLINUX
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213 static Lisp_Object
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214 tty_get_foreign_selection (Lisp_Object selection_symbol, Lisp_Object target_type)
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215 {
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216 /* This function can GC */
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217 struct device *d = decode_device (Qnil);
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218 int fd = DEVICE_INFD (d);
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219 char c = 3;
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220 Lisp_Object output_stream;
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221 Lisp_Object terminal_stream;
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222 Lisp_Object output_string;
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223 struct gcpro gcpro1,gcpro2,gcpro3;
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224
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225 GCPRO3(output_stream,terminal_stream,output_string);
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226
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227 /* The ioctl() to paste actually puts things in the input queue of
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228 ** the virtual console, so we need to trap that data, since we are
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229 ** supposed to return the actual string selection from this
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230 ** function.
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231 */
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153
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232
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398
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233 /* I really hate doing this, but it doesn't seem to cause any
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234 ** problems, and it makes the Lstream_read stuff further down
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235 ** error out correctly instead of trying to indefinitely read from
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236 ** the console.
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237 **
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238 ** There is no set_descriptor_blocking() function call, but in my
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239 ** testing under linux, it has not proved fatal to leave the
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240 ** descriptor in non-blocking mode.
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241 **
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242 ** William Perry Nov 5, 1999
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243 */
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244 set_descriptor_non_blocking (fd);
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245
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246 /* We need two streams, one for reading from the selected device,
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247 ** and one to write the data into. There is no writable version
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248 ** of the lisp-string lstream, so we make do with a resizing
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249 ** buffer stream, and make a string out of it after we are
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250 ** done.
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251 */
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252 output_stream = make_resizing_buffer_output_stream ();
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253 terminal_stream = make_filedesc_input_stream (fd, 0, -1, LSTR_BLOCKED_OK);
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254 output_string = Qnil;
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255
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256 /* #### We should arguably use a specbind() and an unwind routine here,
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257 ** #### but I don't care that much right now.
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258 */
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259 if (NILP (output_stream) || NILP (terminal_stream))
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260 {
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261 /* Should we signal an error here? */
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262 goto out;
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263 }
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264
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265 if (ioctl (fd, TIOCLINUX, &c) < 0)
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266 {
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267 /* Could not get the selection - eek */
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268 UNGCPRO;
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269 return (Qnil);
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270 }
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271
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272 while (1)
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273 {
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274 Bufbyte tempbuf[1024]; /* some random amount */
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275 ssize_t i;
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276 ssize_t size_in_bytes =
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277 Lstream_read (XLSTREAM (terminal_stream),
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278 tempbuf, sizeof (tempbuf));
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279
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280 if (size_in_bytes <= 0)
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281 {
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282 /* end of the stream */
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283 break;
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284 }
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285
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286 /* convert CR->LF */
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287 for (i = 0; i < size_in_bytes; i++)
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288 {
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289 if (tempbuf[i] == '\r')
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290 {
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291 tempbuf[i] = '\n';
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292 }
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293 }
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294
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295 Lstream_write (XLSTREAM (output_stream), tempbuf, size_in_bytes);
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296 }
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297
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298 Lstream_flush (XLSTREAM (output_stream));
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299
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300 output_string = make_string (resizing_buffer_stream_ptr (XLSTREAM (output_stream)),
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301 Lstream_byte_count (XLSTREAM (output_stream)));
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302
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303 Lstream_delete (XLSTREAM (output_stream));
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304 Lstream_delete (XLSTREAM (terminal_stream));
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305
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306 out:
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307 UNGCPRO;
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308 return (output_string);
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153
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309 }
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310
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398
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311 static Lisp_Object
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312 tty_selection_exists_p (Lisp_Object selection)
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313 {
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314 return (Qt);
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315 }
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316 #endif /* TIOCLINUX */
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317
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318 #if 0
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319 static Lisp_Object
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320 tty_own_selection (Lisp_Object selection_name, Lisp_Object selection_value)
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321 {
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322 /* There is no way to do this cleanly - the GPM selection
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323 ** 'protocol' (actually the TIOCLINUX ioctl) requires a start and
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324 ** end position on the _screen_, not a string to stick in there.
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325 ** Lame.
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326 **
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327 ** William Perry Nov 4, 1999
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328 */
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329 }
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330 #endif
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331
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332 /* This function appears to work once in a blue moon. I'm not sure
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333 ** exactly why either. *sigh*
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334 **
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335 ** William Perry Nov 4, 1999
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336 **
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337 ** Apparently, this is the way (mouse-position) is supposed to work,
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338 ** and I was just expecting something else. (mouse-pixel-position)
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339 ** works just fine.
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340 **
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341 ** William Perry Nov 7, 1999
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342 */
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343 static int
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344 tty_get_mouse_position (struct device *d, Lisp_Object *frame, int *x, int *y)
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153
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345 {
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398
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346 Gpm_Event ev;
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347 int num_buttons;
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348
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349 memset(&ev,'\0',sizeof(ev));
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350
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351 num_buttons = Gpm_GetSnapshot(&ev);
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352
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353 if (!num_buttons)
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354 {
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355 /* This means there are events pending... */
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356
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357 /* #### In theory, we should drain the events pending, stick
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358 ** #### them in the queue, and return the mouse position
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359 ** #### anyway.
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360 */
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361 return(-1);
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362 }
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363 *x = ev.x;
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364 *y = ev.y;
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365 *frame = DEVICE_SELECTED_FRAME (d);
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366 return (1);
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367 }
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368
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369 static void
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370 tty_set_mouse_position (struct window *w, int x, int y)
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371 {
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372 /*
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373 #### I couldn't find any GPM functions that set the mouse position.
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374 #### Mr. Perry had left this function empty; that must be why.
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375 #### karlheg
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376 */
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377 }
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378
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379 static int gpm_event_pending_p (int user_p)
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|
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380 {
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381 Lisp_Object event;
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153
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382
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398
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383 EVENT_CHAIN_LOOP (event, gpm_event_queue)
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384 {
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385 if (!user_p || command_event_p (event))
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386 {
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387 return (1);
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388 }
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389 }
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390 return (orig_event_pending_p (user_p));
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|
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391 }
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|
|
392
|
|
|
393 static void gpm_next_event_cb (Lisp_Event *event)
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|
|
394 {
|
|
|
395 /* #### It would be nice to preserve some sort of ordering of the
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396 ** #### different types of events, but that would be quite a bit
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|
397 ** #### of work, and would more than likely break the abstraction
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|
398 ** #### between the other event loops and this one.
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|
|
399 */
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400
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|
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401 if (!NILP (gpm_event_queue))
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|
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402 {
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403 Lisp_Object queued_event = dequeue_event (&gpm_event_queue, &gpm_event_queue_tail);
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404 *event = *(XEVENT (queued_event));
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405
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|
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406 if (event->event_type == pointer_motion_event)
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|
|
407 {
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|
|
408 struct device *d = decode_device (event->channel);
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|
|
409 int fd = DEVICE_INFD (d);
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|
153
|
410
|
|
398
|
411 /* Ok, now this is just freaky. Bear with me though.
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|
|
412 **
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|
|
413 ** If you run gnuclient and attach to a XEmacs running in
|
|
|
414 ** X or on another TTY, the mouse cursor does not get
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|
|
415 ** drawn correctly. This is because the ioctl() fails
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|
|
416 ** with EPERM because the TTY specified is not our
|
|
|
417 ** controlling terminal. If you are the superuser, it
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|
|
418 ** will work just spiffy. The appropriate source file (at
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|
|
419 ** least in linux 2.2.x) is
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|
|
420 ** .../linux/drivers/char/console.c in the function
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421 ** tioclinux(). The following bit of code is brutal to
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422 ** us:
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423 **
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424 ** if (current->tty != tty && !suser())
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425 ** return -EPERM;
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426 **
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427 ** I even tried setting us as a process leader, removing
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428 ** our controlling terminal, and then using the TIOCSCTTY
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429 ** to set up a new controlling terminal, all with no luck.
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430 **
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431 ** What is even weirder is if you run XEmacs in a VC, and
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432 ** attach to it from another VC with gnuclient, go back to
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433 ** the original VC and hit a key, the mouse pointer
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434 ** displays (in BOTH VCs), until you hit a key in the
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435 ** second VC, after which it does not display in EITHER
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436 ** VC. Bizarre, no?
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437 **
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438 ** All I can say is thank god Linux comes with source code
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439 ** or I would have been completely confused. Well, ok,
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440 ** I'm still completely confused. I don't see why they
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441 ** don't just check the permissions on the device
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442 ** (actually, if you have enough access to it to get the
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443 ** console's file descriptor, you should be able to do
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444 ** with it as you wish, but maybe that is just me).
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445 **
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446 ** William M. Perry - Nov 9, 1999
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447 */
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448
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449 Gpm_DrawPointer (event->event.motion.x,event->event.motion.y, fd);
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450 }
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451
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452 return;
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453 }
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454
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455 orig_next_event_cb (event);
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456 }
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457
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458 static void hook_event_callbacks_once (void)
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459 {
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460 static int hooker;
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461
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462 if (!hooker)
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463 {
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464 orig_event_pending_p = event_stream->event_pending_p;
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465 orig_next_event_cb = event_stream->next_event_cb;
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466 event_stream->event_pending_p = gpm_event_pending_p;
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467 event_stream->next_event_cb = gpm_next_event_cb;
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468 hooker = 1;
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469 }
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153
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470 }
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471
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398
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472 static void hook_console_methods_once (void)
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473 {
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474 static int hooker;
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475
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476 if (!hooker)
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477 {
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478 /* Install the mouse position methods for the TTY console type */
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479 CONSOLE_HAS_METHOD (tty, get_mouse_position);
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480 CONSOLE_HAS_METHOD (tty, set_mouse_position);
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481 CONSOLE_HAS_METHOD (tty, get_foreign_selection);
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482 CONSOLE_HAS_METHOD (tty, selection_exists_p);
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483 #if 0
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484 CONSOLE_HAS_METHOD (tty, own_selection);
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153
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485 #endif
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398
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486 }
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487 }
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488
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489 DEFUN ("gpm-enabled-p", Fgpm_enabled_p, 0, 1, 0, /*
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490 Return non-nil if GPM mouse support is currently enabled on DEVICE.
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491 */
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492 (device))
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493 {
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494 char *console_name = ttyname (DEVICE_INFD (decode_device (device)));
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495 char process_name[1024];
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496 Lisp_Object proc;
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497
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498 if (!console_name)
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499 {
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500 return (Qnil);
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501 }
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502
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503 memset (process_name, '\0', sizeof(process_name));
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504 snprintf (process_name, sizeof(process_name) - 1, "gpm for %s", console_name);
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505
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506 proc = Fget_process (build_string (process_name));
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507
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508 if (NILP (proc))
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509 {
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510 return (Qnil);
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511 }
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512
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513 if (1) /* (PROCESS_LIVE_P (proc)) */
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514 {
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515 return (Qt);
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516 }
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517 return (Qnil);
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518 }
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519
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520 DEFUN ("gpm-enable", Fgpm_enable, 0, 2, 0, /*
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521 Toggle accepting of GPM mouse events.
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522 */
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523 (device, arg))
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524 {
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525 Gpm_Connect conn;
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526 int rval;
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527 Lisp_Object gpm_process;
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528 Lisp_Object gpm_filter;
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529 struct device *d = decode_device (device);
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530 int fd = DEVICE_INFD (d);
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531 char *console_name = ttyname (fd);
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532 char process_name[1024];
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533
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534 hook_event_callbacks_once ();
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535 hook_console_methods_once ();
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536
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537 if (noninteractive)
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538 {
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539 error ("Can't connect to GPM in batch mode.");
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540 }
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541
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542 if (!console_name)
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543 {
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544 /* Something seriously wrong here... */
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545 return (Qnil);
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546 }
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547
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548 memset (process_name, '\0', sizeof(process_name));
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549 snprintf (process_name, sizeof(process_name) - 1, "gpm for %s", console_name);
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550
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551 if (NILP (arg))
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552 {
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553 turn_off_gpm (process_name);
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554 return (Qnil);
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555 }
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556
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557 /* DANGER DANGER.
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558 ** Though shalt not call (gpm-enable t) after we have already
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559 ** started, or stuff blows up.
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560 */
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561 if (!NILP (Fgpm_enabled_p (device)))
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562 {
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563 error ("GPM already enabled for this console.");
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564 }
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565
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566 conn.eventMask = GPM_DOWN|GPM_UP|GPM_MOVE|GPM_DRAG;
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567 conn.defaultMask = GPM_MOVE;
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568 conn.minMod = 0;
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569 conn.maxMod = ((1<<KG_SHIFT)|(1<<KG_ALT)|(1<<KG_CTRL));
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570
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571 /* Reset some silly static variables so that multiple Gpm_Open()
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|
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572 ** calls have even a sligh chance of working
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573 */
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574 gpm_tried = 0;
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|
575 gpm_flag = 0;
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576 gpm_stack = NULL;
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577
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|
|
578 /* Make sure Gpm_Open() does ioctl() on the correct
|
|
|
579 ** descriptor, or it can get the wrong terminal sizes, etc.
|
|
|
580 */
|
|
|
581 gpm_consolefd = fd;
|
|
|
582
|
|
|
583 /* We have to pass the virtual console manually, otherwise if you
|
|
|
584 ** use 'gnuclient -nw' to connect to an XEmacs that is running in
|
|
|
585 ** X, Gpm_Open() tries to use ttyname(0 | 1 | 2) to find out which
|
|
|
586 ** console you are using, which is of course not correct for the
|
|
|
587 ** new tty device.
|
|
|
588 */
|
|
|
589 if (strncmp (console_name, "/dev/tty",8) || !isdigit (console_name[8]))
|
|
|
590 {
|
|
|
591 /* Urk, something really wrong */
|
|
|
592 return (Qnil);
|
|
|
593 }
|
|
|
594
|
|
|
595 rval = Gpm_Open (&conn, atoi(console_name + 8));
|
|
|
596
|
|
|
597 switch (rval) {
|
|
|
598 case -1: /* General failure */
|
|
|
599 break;
|
|
|
600 case -2: /* We are running under an XTerm */
|
|
|
601 Gpm_Close();
|
|
|
602 break;
|
|
|
603 default:
|
|
|
604 /* Is this really necessary? */
|
|
|
605 set_descriptor_non_blocking (gpm_fd);
|
|
|
606 store_gpm_state (gpm_fd);
|
|
|
607 gpm_process = connect_to_file_descriptor (build_string (process_name), Qnil,
|
|
|
608 make_int (gpm_fd),
|
|
|
609 make_int (gpm_fd));
|
|
|
610
|
|
|
611 if (!NILP (gpm_process))
|
|
|
612 {
|
|
|
613 rval = 0;
|
|
|
614 Fprocess_kill_without_query (gpm_process, Qnil);
|
|
|
615 XSETSUBR (gpm_filter, &SFreceive_gpm_event);
|
|
|
616 set_process_filter (gpm_process, gpm_filter, 1);
|
|
|
617
|
|
|
618 /* Keep track of the device for later */
|
|
|
619 /* Fput (gpm_process, intern ("gpm-device"), device); */
|
|
|
620 }
|
|
|
621 else
|
|
|
622 {
|
|
|
623 Gpm_Close();
|
|
|
624 rval = -1;
|
|
|
625 }
|
|
|
626 }
|
|
|
627
|
|
|
628 return(rval ? Qnil : Qt);
|
|
|
629 }
|
|
|
630
|
|
|
631 void vars_of_gpmevent (void)
|
|
|
632 {
|
|
|
633 gpm_event_queue = Qnil;
|
|
|
634 gpm_event_queue_tail = Qnil;
|
|
|
635 staticpro (&gpm_event_queue);
|
|
|
636 staticpro (&gpm_event_queue_tail);
|
|
|
637 pdump_wire (&gpm_event_queue);
|
|
|
638 pdump_wire (&gpm_event_queue_tail);
|
|
|
639 }
|
|
|
640
|
|
|
641 void syms_of_gpmevent (void)
|
|
|
642 {
|
|
|
643 DEFSUBR (Freceive_gpm_event);
|
|
|
644 DEFSUBR (Fgpm_enable);
|
|
|
645 DEFSUBR (Fgpm_enabled_p);
|
|
|
646 }
|
|
|
647
|
|
|
648 #endif /* HAVE_GPM */
|
