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428
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1 /* Console functions for X windows.
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2 Copyright (C) 1996 Ben Wing.
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3
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4 This file is part of XEmacs.
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5
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6 XEmacs is free software; you can redistribute it and/or modify it
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7 under the terms of the GNU General Public License as published by the
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8 Free Software Foundation; either version 2, or (at your option) any
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9 later version.
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10
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11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with XEmacs; see the file COPYING. If not, write to
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18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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19 Boston, MA 02111-1307, USA. */
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20
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21 /* Synched up with: Not in FSF. */
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22
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442
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23 /* This file Mule-ized by Ben Wing, 7-10-00. */
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24
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428
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25 /* Authorship:
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26
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27 Ben Wing: January 1996, for 19.14.
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28 */
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29
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30 #include <config.h>
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31 #include "lisp.h"
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32
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33 #include "console-x.h"
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442
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34 #include "buffer.h"
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428
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35 #include "process.h" /* canonicalize_host_name */
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36 #include "redisplay.h" /* for display_arg */
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37
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38 DEFINE_CONSOLE_TYPE (x);
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39
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40 static int
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41 x_initially_selected_for_input (struct console *con)
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42 {
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43 return 1;
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44 }
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45
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444
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46 /* Parse a DISPLAY specification like "host:10.0" or ":0" */
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428
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47 static void
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48 split_up_display_spec (Lisp_Object display, int *hostname_length,
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49 int *display_length, int *screen_length)
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50 {
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444
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51 Bufbyte *beg = XSTRING_DATA (display);
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52 Bufbyte *end = beg + XSTRING_LENGTH (display);
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53 Bufbyte *p = end;
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428
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54
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444
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55 while (p > beg)
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428
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56 {
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444
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57 DEC_CHARPTR (p);
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58 if (charptr_emchar (p) == ':')
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59 {
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60 *hostname_length = p - beg;
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428
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61
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444
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62 while (p < end - 1)
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63 {
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64 INC_CHARPTR (p);
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65 if (charptr_emchar (p) == '.')
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66 {
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67 *display_length = p - beg - *hostname_length;
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68 *screen_length = end - p;
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69 return;
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70 }
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71 }
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72 /* No '.' found. */
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73 *display_length = XSTRING_LENGTH (display) - *hostname_length;
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74 *screen_length = 0;
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75 return;
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76 }
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428
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77 }
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78
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444
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79 /* No ':' found. */
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80 *hostname_length = XSTRING_LENGTH (display);
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81 *display_length = 0;
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82 *screen_length = 0;
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428
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83 }
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84
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85 /* Remember, in all of the following functions, we have to verify
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86 the integrity of our input, because the generic functions don't. */
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87
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88 static Lisp_Object
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89 x_device_to_console_connection (Lisp_Object connection, Error_behavior errb)
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90 {
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91 /* Strip the trailing .# off of the connection, if it's there. */
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92
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93 if (NILP (connection))
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94 return Qnil;
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95 else
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96 {
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97 int hostname_length, display_length, screen_length;
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98
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99 if (!ERRB_EQ (errb, ERROR_ME))
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100 {
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101 if (!STRINGP (connection))
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102 return Qunbound;
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103 }
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104 else
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105 CHECK_STRING (connection);
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106
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107 split_up_display_spec (connection, &hostname_length, &display_length,
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108 &screen_length);
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109 connection = make_string (XSTRING_DATA (connection),
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110 hostname_length + display_length);
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111 }
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112
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113 return connection;
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114 }
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115
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116 static Lisp_Object
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117 get_display_arg_connection (void)
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118 {
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442
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119 const Extbyte *disp_name;
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428
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120
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121 /* If the user didn't explicitly specify a display to use when
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122 they called make-x-device, then we first check to see if a
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123 display was specified on the command line with -display. If
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124 so, we set disp_name to it. Otherwise we use XDisplayName to
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125 see what DISPLAY is set to. XtOpenDisplay knows how to do
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126 both of these things, but we need to know the name to use. */
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127 if (display_arg)
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128 {
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129 int elt;
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130 int argc;
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442
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131 Extbyte **argv;
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428
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132 Lisp_Object conn;
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133
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134 make_argc_argv (Vx_initial_argv_list, &argc, &argv);
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135
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136 disp_name = NULL;
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137 for (elt = 0; elt < argc; elt++)
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138 {
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139 if (!strcmp (argv[elt], "-d") || !strcmp (argv[elt], "-display"))
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140 {
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141 if (elt + 1 == argc)
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142 {
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143 suppress_early_error_handler_backtrace = 1;
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442
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144 type_error (Qinvalid_argument,
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145 "-display specified with no arg");
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428
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146 }
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147 else
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148 {
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149 disp_name = argv[elt + 1];
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150 break;
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151 }
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152 }
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153 }
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154
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155 /* assert: display_arg is only set if we found the display
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156 arg earlier so we can't fail to find it now. */
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157 assert (disp_name != NULL);
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442
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158 conn = build_ext_string (disp_name, Qcommand_argument_encoding);
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428
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159 free_argc_argv (argv);
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160 return conn;
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161 }
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162 else
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442
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163 return build_ext_string (XDisplayName (0), Qx_display_name_encoding);
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428
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164 }
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165
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166 /* "semi-canonicalize" means convert to a nicer form for printing, but
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167 don't completely canonicalize (into some likely ugly form) */
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168
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169 static Lisp_Object
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170 x_semi_canonicalize_console_connection (Lisp_Object connection,
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171 Error_behavior errb)
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172 {
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173 struct gcpro gcpro1;
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174
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175 GCPRO1 (connection);
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176
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177 if (NILP (connection))
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178 connection = get_display_arg_connection ();
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179 else
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180 {
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181 if (!ERRB_EQ (errb, ERROR_ME))
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182 {
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183 if (!STRINGP (connection))
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184 RETURN_UNGCPRO (Qunbound);
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185 }
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186 else
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187 CHECK_STRING (connection);
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188 }
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189
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190
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191 /* Be lenient, allow people to specify a device connection instead of
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192 a console connection -- e.g. "foo:0.0" instead of "foo:0". This
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193 only happens in `find-console' and `get-console'. */
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194 connection = x_device_to_console_connection (connection, errb);
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195
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196 /* Check for a couple of standard special cases */
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444
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197 if (string_char (XSTRING (connection), 0) == ':')
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428
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198 connection = concat2 (build_string ("localhost"), connection);
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444
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199 else
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200 {
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201 /* connection =~ s/^unix:/localhost:/; */
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202 const Bufbyte *p = XSTRING_DATA (connection);
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203 const Bufbyte *end = XSTRING_DATA (connection) + XSTRING_LENGTH (connection);
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204 size_t i;
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205
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206 for (i = 0; i < sizeof ("unix:") - 1; i++)
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207 {
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208 if (p == end || charptr_emchar (p) != "unix:"[i])
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209 goto ok;
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210 INC_CHARPTR (p);
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211 }
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212
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213 connection = concat2 (build_string ("localhost:"),
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214 make_string (p, end - p));
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215 }
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216 ok:
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428
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217
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218 RETURN_UNGCPRO (connection);
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219 }
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220
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221 static Lisp_Object
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222 x_canonicalize_console_connection (Lisp_Object connection, Error_behavior errb)
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223 {
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224 Lisp_Object hostname = Qnil;
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225 struct gcpro gcpro1, gcpro2;
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226
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227 GCPRO2 (connection, hostname);
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228
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229 connection = x_semi_canonicalize_console_connection (connection, errb);
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230 if (UNBOUNDP (connection))
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231 RETURN_UNGCPRO (Qunbound);
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232
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233 {
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234 int hostname_length, display_length, screen_length;
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235
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236 split_up_display_spec (connection, &hostname_length, &display_length,
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237 &screen_length);
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238 hostname = Fsubstring (connection, Qzero, make_int (hostname_length));
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239 hostname = canonicalize_host_name (hostname);
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240 connection = concat2 (hostname,
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241 make_string (XSTRING_DATA (connection)
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242 + hostname_length, display_length));
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243 }
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244
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245 RETURN_UNGCPRO (connection);
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246 }
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247
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248 static Lisp_Object
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249 x_semi_canonicalize_device_connection (Lisp_Object connection,
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250 Error_behavior errb)
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251 {
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252 int hostname_length, display_length, screen_length;
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253 struct gcpro gcpro1;
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254
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255 GCPRO1 (connection);
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256 if (NILP (connection))
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257 connection = get_display_arg_connection ();
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258 else
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259 {
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260 if (!ERRB_EQ (errb, ERROR_ME))
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261 {
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262 if (!STRINGP (connection))
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263 RETURN_UNGCPRO (Qunbound);
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264 }
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265 else
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266 CHECK_STRING (connection);
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267 }
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268
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269 split_up_display_spec (connection, &hostname_length, &display_length,
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270 &screen_length);
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271
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272 if (!screen_length)
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273 connection = concat2 (connection, build_string (".0"));
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274 RETURN_UNGCPRO (connection);
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275 }
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276
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277 static Lisp_Object
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278 x_canonicalize_device_connection (Lisp_Object connection, Error_behavior errb)
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279 {
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280 int hostname_length, display_length, screen_length;
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281 Lisp_Object screen_str = Qnil;
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282 struct gcpro gcpro1, gcpro2;
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283
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284 GCPRO2 (screen_str, connection);
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285 connection = x_semi_canonicalize_device_connection (connection, errb);
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286 if (UNBOUNDP (connection))
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287 RETURN_UNGCPRO (Qunbound);
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288
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289 split_up_display_spec (connection, &hostname_length, &display_length,
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290 &screen_length);
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291
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444
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292 screen_str = make_string (XSTRING_DATA (connection)
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293 + hostname_length + display_length, screen_length);
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428
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294 connection = x_canonicalize_console_connection (connection, errb);
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295
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296 RETURN_UNGCPRO (concat2 (connection, screen_str));
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297 }
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298
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299 void
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300 console_type_create_x (void)
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301 {
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302 INITIALIZE_CONSOLE_TYPE (x, "x", "console-x-p");
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303
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304 CONSOLE_HAS_METHOD (x, semi_canonicalize_console_connection);
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305 CONSOLE_HAS_METHOD (x, canonicalize_console_connection);
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306 CONSOLE_HAS_METHOD (x, semi_canonicalize_device_connection);
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307 CONSOLE_HAS_METHOD (x, canonicalize_device_connection);
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308 CONSOLE_HAS_METHOD (x, device_to_console_connection);
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309 CONSOLE_HAS_METHOD (x, initially_selected_for_input);
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310 }
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311
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312
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313 void
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314 reinit_console_type_create_x (void)
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315 {
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316 REINITIALIZE_CONSOLE_TYPE (x);
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317 }
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