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428
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1 /* TTY device functions.
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2 Copyright (C) 1994, 1995 Board of Trustees, University of Illinois.
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3 Copyright (C) 1994, 1995 Free Software Foundation, Inc.
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4 Copyright (C) 1996 Ben Wing.
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5
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6 This file is part of XEmacs.
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7
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8 XEmacs is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 2, or (at your option) any
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11 later version.
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12
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13 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with XEmacs; see the file COPYING. If not, write to
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20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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21 Boston, MA 02111-1307, USA. */
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22
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23 /* Synched up with: Not in FSF. */
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24
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25 /* Authors: Ben Wing and Chuck Thompson. */
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26
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27 #include <config.h>
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28 #include "lisp.h"
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29
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30 #include "console-tty.h"
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31 #include "console-stream.h"
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32 #include "events.h"
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33 #include "faces.h"
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34 #include "frame.h"
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35 #include "lstream.h"
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36 #include "redisplay.h"
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37 #include "sysdep.h"
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38
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39 #include "syssignal.h" /* for SIGWINCH */
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40
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41 #include <errno.h>
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42
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43 Lisp_Object Qinit_pre_tty_win, Qinit_post_tty_win;
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44
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45
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46 static void
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47 allocate_tty_device_struct (struct device *d)
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48 {
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49 d->device_data = xnew_and_zero (struct tty_device);
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50 }
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51
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52 static void
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53 tty_init_device (struct device *d, Lisp_Object props)
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54 {
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55 struct console *con = XCONSOLE (DEVICE_CONSOLE (d));
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56 Lisp_Object terminal_type = CONSOLE_TTY_DATA (con)->terminal_type;
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57
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58 DEVICE_INFD (d) = CONSOLE_TTY_DATA (con)->infd;
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59 DEVICE_OUTFD (d) = CONSOLE_TTY_DATA (con)->outfd;
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60
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61 allocate_tty_device_struct (d);
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62 init_baud_rate (d);
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63
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64 switch (init_tty_for_redisplay (d, (char *) XSTRING_DATA (terminal_type)))
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65 {
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66 #if 0
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67 case TTY_UNABLE_OPEN_DATABASE:
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68 suppress_early_error_handler_backtrace = 1;
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69 error ("Can't access terminal information database");
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70 break;
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71 #endif
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72 case TTY_TYPE_UNDEFINED:
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73 suppress_early_error_handler_backtrace = 1;
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74 error ("Terminal type `%s' undefined (or can't access database?)",
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75 XSTRING_DATA (terminal_type));
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76 break;
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77 case TTY_TYPE_INSUFFICIENT:
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78 suppress_early_error_handler_backtrace = 1;
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79 error ("Terminal type `%s' not powerful enough to run Emacs",
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80 XSTRING_DATA (terminal_type));
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81 break;
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82 case TTY_SIZE_UNSPECIFIED:
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83 suppress_early_error_handler_backtrace = 1;
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84 error ("Can't determine window size of terminal");
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85 break;
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86 case TTY_INIT_SUCCESS:
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87 break;
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88 default:
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89 abort ();
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90 }
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91
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92 init_one_device (d);
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93
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94 /* Run part of the elisp side of the TTY device initialization.
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95 The post-init is run in the tty_after_init_frame() method. */
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96 call0 (Qinit_pre_tty_win);
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97 }
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98
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99 static void
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100 free_tty_device_struct (struct device *d)
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101 {
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102 struct tty_device *td = (struct tty_device *) d->device_data;
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103 if (td)
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104 xfree (td);
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105 }
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106
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107 static void
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108 tty_delete_device (struct device *d)
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109 {
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110 free_tty_device_struct (d);
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111 }
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112
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113 #ifdef SIGWINCH
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114
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115 static SIGTYPE
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116 tty_device_size_change_signal (int signo)
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117 {
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118 int old_errno = errno;
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119 asynch_device_change_pending++;
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120 #ifdef HAVE_UNIXOID_EVENT_LOOP
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121 signal_fake_event ();
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122 #endif
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123 EMACS_REESTABLISH_SIGNAL (SIGWINCH, tty_device_size_change_signal);
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124 errno = old_errno;
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125 SIGRETURN;
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126 }
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127
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128 /* frame_change_signal does nothing but set a flag that it was called.
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129 When redisplay is called, it will notice that the flag is set and
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130 call handle_pending_device_size_change to do the actual work. */
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131 static void
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132 tty_asynch_device_change (void)
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133 {
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134 Lisp_Object devcons, concons;
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135
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136 DEVICE_LOOP_NO_BREAK (devcons, concons)
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137 {
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138 int width, height;
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139 Lisp_Object tail;
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140 struct device *d = XDEVICE (XCAR (devcons));
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141 struct console *con = XCONSOLE (DEVICE_CONSOLE (d));
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142
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143 if (!DEVICE_TTY_P (d))
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144 continue;
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145
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146 get_tty_device_size (d, &width, &height);
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147 if (width > 0 && height > 0
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148 && (CONSOLE_TTY_DATA (con)->width != width
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149 || CONSOLE_TTY_DATA (con)->height != height))
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150 {
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151 CONSOLE_TTY_DATA (con)->width = width;
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152 CONSOLE_TTY_DATA (con)->height = height;
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153
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154 for (tail = DEVICE_FRAME_LIST (d);
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155 !NILP (tail);
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156 tail = XCDR (tail))
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157 {
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158 struct frame *f = XFRAME (XCAR (tail));
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159
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160 /* We know the frame is tty because we made sure that the
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161 device is tty. */
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162 change_frame_size (f, height, width, 1);
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163 }
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164 }
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165 }
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166 }
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167
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168 #endif /* SIGWINCH */
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169
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170 static Lisp_Object
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171 tty_device_system_metrics (struct device *d,
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172 enum device_metrics m)
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173 {
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174 struct console *con = XCONSOLE (DEVICE_CONSOLE (d));
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175 switch (m)
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176 {
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177 case DM_size_device:
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178 return Fcons (make_int (CONSOLE_TTY_DATA (con)->width),
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179 make_int (CONSOLE_TTY_DATA (con)->height));
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180 default: /* No such device metric property for TTY devices */
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181 return Qunbound;
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182 }
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183 }
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184
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185 /************************************************************************/
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186 /* initialization */
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187 /************************************************************************/
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188
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189 void
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190 syms_of_device_tty (void)
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191 {
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192 defsymbol (&Qinit_pre_tty_win, "init-pre-tty-win");
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193 defsymbol (&Qinit_post_tty_win, "init-post-tty-win");
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194 }
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195
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196 void
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197 console_type_create_device_tty (void)
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198 {
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199 /* device methods */
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200 CONSOLE_HAS_METHOD (tty, init_device);
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201 CONSOLE_HAS_METHOD (tty, delete_device);
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202 #ifdef SIGWINCH
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203 CONSOLE_HAS_METHOD (tty, asynch_device_change);
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204 #endif /* SIGWINCH */
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205 CONSOLE_HAS_METHOD (tty, device_system_metrics);
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206 }
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207
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208 void
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209 init_device_tty (void)
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210 {
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211 #ifdef SIGWINCH
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212 if (initialized && !noninteractive)
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213 signal (SIGWINCH, tty_device_size_change_signal);
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214 #endif /* SIGWINCH */
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215 }
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