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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 =
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50 (struct tty_device *) xmalloc (sizeof (struct tty_device));
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51
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52 /* zero out all slots. */
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53 memset (d->device_data, 0, sizeof (struct tty_device));
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54 }
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55
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56 static void
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57 tty_init_device (struct device *d, Lisp_Object props)
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58 {
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59 struct console *con = XCONSOLE (DEVICE_CONSOLE (d));
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60 Lisp_Object terminal_type = CONSOLE_TTY_DATA (con)->terminal_type;
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61
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62 DEVICE_INFD (d) = CONSOLE_TTY_DATA (con)->infd;
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63 DEVICE_OUTFD (d) = CONSOLE_TTY_DATA (con)->outfd;
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64
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65 allocate_tty_device_struct (d);
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66 init_baud_rate (d);
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67
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14
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68 switch (init_tty_for_redisplay (d, (char *) XSTRING_DATA (terminal_type)))
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0
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69 {
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70 #if 0
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71 case TTY_UNABLE_OPEN_DATABASE:
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72 suppress_early_backtrace = 1;
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73 error ("Can't access terminal information database");
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74 break;
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75 #endif
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76 case TTY_TYPE_UNDEFINED:
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77 suppress_early_backtrace = 1;
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78 error ("Terminal type `%s' undefined (or can't access database?)",
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14
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79 XSTRING_DATA (terminal_type));
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0
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80 break;
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81 case TTY_TYPE_INSUFFICIENT:
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82 suppress_early_backtrace = 1;
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83 error ("Terminal type `%s' not powerful enough to run Emacs",
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14
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84 XSTRING_DATA (terminal_type));
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0
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85 break;
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86 case TTY_SIZE_UNSPECIFIED:
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87 suppress_early_backtrace = 1;
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88 error ("Can't determine window size of terminal");
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89 break;
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90 case TTY_INIT_SUCCESS:
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91 break;
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92 default:
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93 abort ();
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94 }
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95
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96 init_one_device (d);
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97
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98 /* Run part of the elisp side of the TTY device initialization.
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99 The post-init is run in the tty_after_init_frame() method. */
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100 call0 (Qinit_pre_tty_win);
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101 }
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102
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103 static void
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104 free_tty_device_struct (struct device *d)
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105 {
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106 struct tty_device *td = (struct tty_device *) d->device_data;
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107 if (td)
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108 xfree (td);
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109 }
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110
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111 static void
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112 tty_delete_device (struct device *d)
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113 {
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114 free_tty_device_struct (d);
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115 }
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116
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117 #ifdef SIGWINCH
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118
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119 static SIGTYPE
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120 tty_device_size_change_signal (int signo)
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121 {
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122 int old_errno = errno;
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123 asynch_device_change_pending++;
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124 signal_fake_event ();
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125 EMACS_REESTABLISH_SIGNAL (SIGWINCH, tty_device_size_change_signal);
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126 errno = old_errno;
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127 SIGRETURN;
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128 }
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129
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130 /* frame_change_signal does nothing but set a flag that it was called.
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131 When redisplay is called, it will notice that the flag is set and
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132 call handle_pending_device_size_change to do the actual work. */
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133 static void
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134 tty_asynch_device_change (void)
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135 {
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136 Lisp_Object devcons, concons;
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137
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138 DEVICE_LOOP_NO_BREAK (devcons, concons)
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139 {
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140 int width, height;
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141 Lisp_Object tail;
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142 struct device *d = XDEVICE (XCAR (devcons));
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143 struct console *con = XCONSOLE (DEVICE_CONSOLE (d));
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144
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145 if (!DEVICE_TTY_P (d))
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146 continue;
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147
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148 get_tty_device_size (d, &width, &height);
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149
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149 if (width > 0 && height > 0
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150 && (CONSOLE_TTY_DATA (con)->width != width
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151 || CONSOLE_TTY_DATA (con)->height != height))
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0
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152 {
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153 CONSOLE_TTY_DATA (con)->width = width;
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154 CONSOLE_TTY_DATA (con)->height = height;
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155
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156 for (tail = DEVICE_FRAME_LIST (d);
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157 !NILP (tail);
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158 tail = XCDR (tail))
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159 {
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160 struct frame *f = XFRAME (XCAR (tail));
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161
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162 /* We know the frame is tty because we made sure that the
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163 device is tty. */
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164 change_frame_size (f, height, width, 1);
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165 }
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166 }
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167 }
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168 }
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169
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170 #endif /* SIGWINCH */
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171
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172 static int
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173 tty_device_pixel_width (struct device *d)
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174 {
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175 struct console *con = XCONSOLE (DEVICE_CONSOLE (d));
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176 return CONSOLE_TTY_DATA (con)->width;
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177 }
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178
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179 static int
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180 tty_device_pixel_height (struct device *d)
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181 {
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182 struct console *con = XCONSOLE (DEVICE_CONSOLE (d));
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183 return CONSOLE_TTY_DATA (con)->height;
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184 }
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185
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186
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187 /************************************************************************/
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188 /* initialization */
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189 /************************************************************************/
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190
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191 void
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192 syms_of_device_tty (void)
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193 {
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194 defsymbol (&Qinit_pre_tty_win, "init-pre-tty-win");
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195 defsymbol (&Qinit_post_tty_win, "init-post-tty-win");
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196 }
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197
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198 void
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199 console_type_create_device_tty (void)
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200 {
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201 /* device methods */
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202 CONSOLE_HAS_METHOD (tty, init_device);
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203 CONSOLE_HAS_METHOD (tty, delete_device);
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204 #ifdef SIGWINCH
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205 CONSOLE_HAS_METHOD (tty, asynch_device_change);
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206 #endif /* SIGWINCH */
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207 CONSOLE_HAS_METHOD (tty, device_pixel_width);
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208 CONSOLE_HAS_METHOD (tty, device_pixel_height);
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209 }
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210
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211 void
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212 init_device_tty (void)
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213 {
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214 #ifdef SIGWINCH
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215 if (initialized && !noninteractive)
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216 signal (SIGWINCH, tty_device_size_change_signal);
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217 #endif /* SIGWINCH */
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218 }
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