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0
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1 /* Simple built-in editing commands.
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2 Copyright (C) 1985, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
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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: Mule 2.0, FSF 19.30. */
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22
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23 #include <config.h>
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24 #include "lisp.h"
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25 #include "commands.h"
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26 #include "buffer.h"
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27 #include "syntax.h"
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28 #include "insdel.h"
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29
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30 Lisp_Object Qkill_forward_chars;
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31 Lisp_Object Qself_insert_command;
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227
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32 Lisp_Object Qno_self_insert;
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0
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33
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34 Lisp_Object Vblink_paren_function;
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35
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36 /* A possible value for a buffer's overwrite-mode variable. */
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37 Lisp_Object Qoverwrite_mode_binary;
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38
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39 /* Non-nil means put this face on the next self-inserting character. */
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40 Lisp_Object Vself_insert_face;
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41
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42 /* This is the command that set up Vself_insert_face. */
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43 Lisp_Object Vself_insert_face_command;
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44
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20
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45 DEFUN ("forward-char", Fforward_char, 0, 2, "_p", /*
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0
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46 Move point right ARG characters (left if ARG negative).
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265
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47 On attempt to pass end of buffer, stop and signal `end-of-buffer'.
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48 On attempt to pass beginning of buffer, stop and signal `beginning-of-buffer'.
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0
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49 On reaching end of buffer, stop and signal error.
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20
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50 */
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51 (arg, buffer))
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0
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52 {
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53 struct buffer *buf = decode_buffer (buffer, 1);
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54
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55 if (NILP (arg))
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56 arg = make_int (1);
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57 else
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58 CHECK_INT (arg);
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59
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60 /* This used to just set point to point + XINT (arg), and then check
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61 to see if it was within boundaries. But now that SET_PT can
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62 potentially do a lot of stuff (calling entering and exiting
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63 hooks, etcetera), that's not a good approach. So we validate the
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64 proposed position, then set point. */
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65 {
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66 Bufpos new_point = BUF_PT (buf) + XINT (arg);
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67
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68 if (new_point < BUF_BEGV (buf))
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69 {
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70 BUF_SET_PT (buf, BUF_BEGV (buf));
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265
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71 Fsignal (Qbeginning_of_buffer, Qnil);
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72 return Qnil;
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0
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73 }
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74 if (new_point > BUF_ZV (buf))
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75 {
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76 BUF_SET_PT (buf, BUF_ZV (buf));
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265
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77 Fsignal (Qend_of_buffer, Qnil);
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78 return Qnil;
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0
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79 }
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80
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81 BUF_SET_PT (buf, new_point);
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82 }
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83
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84 return Qnil;
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85 }
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86
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20
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87 DEFUN ("backward-char", Fbackward_char, 0, 2, "_p", /*
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0
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88 Move point left ARG characters (right if ARG negative).
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265
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89 On attempt to pass end of buffer, stop and signal `end-of-buffer'.
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90 On attempt to pass beginning of buffer, stop and signal `beginning-of-buffer'.
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20
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91 */
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92 (arg, buffer))
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0
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93 {
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94 if (NILP (arg))
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95 arg = make_int (1);
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96 else
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97 CHECK_INT (arg);
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98
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99 XSETINT (arg, - XINT (arg));
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100 return Fforward_char (arg, buffer);
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101 }
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102
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20
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103 DEFUN ("forward-line", Fforward_line, 0, 2, "_p", /*
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0
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104 Move ARG lines forward (backward if ARG is negative).
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105 Precisely, if point is on line I, move to the start of line I + ARG.
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106 If there isn't room, go as far as possible (no error).
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107 Returns the count of lines left to move. If moving forward,
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108 that is ARG - number of lines moved; if backward, ARG + number moved.
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109 With positive ARG, a non-empty line at the end counts as one line
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110 successfully moved (for the return value).
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111 If BUFFER is nil, the current buffer is assumed.
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20
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112 */
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113 (arg, buffer))
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0
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114 {
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115 struct buffer *buf = decode_buffer (buffer, 1);
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116 Bufpos pos2 = BUF_PT (buf);
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117 Bufpos pos;
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286
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118 EMACS_INT count, shortage, negp;
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0
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119
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120 if (NILP (arg))
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121 count = 1;
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122 else
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123 {
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124 CHECK_INT (arg);
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125 count = XINT (arg);
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126 }
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127
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128 negp = count <= 0;
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129 pos = scan_buffer (buf, '\n', pos2, 0, count - negp, &shortage, 1);
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130 if (shortage > 0
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131 && (negp
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132 || (BUF_ZV (buf) > BUF_BEGV (buf)
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133 && pos != pos2
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134 && BUF_FETCH_CHAR (buf, pos - 1) != '\n')))
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135 shortage--;
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136 BUF_SET_PT (buf, pos);
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137 return make_int (negp ? - shortage : shortage);
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138 }
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139
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74
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140 DEFUN ("point-at-bol", Fpoint_at_bol, 0, 2, 0, /*
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141 Return the character position of the first character on the current line.
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142 With argument N not nil or 1, move forward N - 1 lines first.
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143 If scan reaches end of buffer, return that position.
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144 This function does not move point.
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145 */
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146 (arg, buffer))
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147 {
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148 struct buffer *b = decode_buffer (buffer, 1);
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203
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149 REGISTER int orig, end;
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74
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150
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151 XSETBUFFER (buffer, b);
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152 if (NILP (arg))
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153 arg = make_int (1);
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154 else
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155 CHECK_INT (arg);
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156
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157 orig = BUF_PT(b);
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158 Fforward_line (make_int (XINT (arg) - 1), buffer);
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159 end = BUF_PT(b);
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160 BUF_SET_PT(b, orig);
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161
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162 return make_int (end);
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163 }
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164
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20
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165 DEFUN ("beginning-of-line", Fbeginning_of_line, 0, 2, "_p", /*
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8
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166 Move point to beginning of current line.
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167 With argument ARG not nil or 1, move forward ARG - 1 lines first.
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168 If scan reaches end of buffer, stop there without error.
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169 If BUFFER is nil, the current buffer is assumed.
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20
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170 */
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171 (arg, buffer))
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8
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172 {
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173 struct buffer *b = decode_buffer (buffer, 1);
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174
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74
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175 BUF_SET_PT(b, XINT (Fpoint_at_bol(arg, buffer)));
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8
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176 return Qnil;
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177 }
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178
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74
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179 DEFUN ("point-at-eol", Fpoint_at_eol, 0, 2, 0, /*
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180 Return the character position of the last character on the current line.
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181 With argument N not nil or 1, move forward N - 1 lines first.
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182 If scan reaches end of buffer, return that position.
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183 This function does not move point.
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20
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184 */
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185 (arg, buffer))
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8
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186 {
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187 struct buffer *buf = decode_buffer (buffer, 1);
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188
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189 XSETBUFFER (buffer, buf);
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190
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191 if (NILP (arg))
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192 arg = make_int (1);
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193 else
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194 CHECK_INT (arg);
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195
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74
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196 return make_int (find_before_next_newline (buf, BUF_PT (buf), 0,
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8
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197 XINT (arg) - (XINT (arg) <= 0)));
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74
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198 }
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199
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200 DEFUN ("end-of-line", Fend_of_line, 0, 2, "_p", /*
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201 Move point to end of current line.
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202 With argument ARG not nil or 1, move forward ARG - 1 lines first.
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203 If scan reaches end of buffer, stop there without error.
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204 If BUFFER is nil, the current buffer is assumed.
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205 */
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206 (arg, buffer))
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207 {
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208 struct buffer *b = decode_buffer (buffer, 1);
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209
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210 BUF_SET_PT(b, XINT (Fpoint_at_eol (arg, buffer)));
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6
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211 return Qnil;
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212 }
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213
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20
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214 DEFUN ("delete-char", Fdelete_char, 1, 2, "*p\nP", /*
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0
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215 Delete the following ARG characters (previous, with negative arg).
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216 Optional second arg KILLFLAG non-nil means kill instead (save in kill ring).
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217 Interactively, ARG is the prefix arg, and KILLFLAG is set if
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218 ARG was explicitly specified.
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20
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219 */
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220 (arg, killflag))
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0
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221 {
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222 /* This function can GC */
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223 Bufpos pos;
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224 struct buffer *buf = current_buffer;
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225
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226 CHECK_INT (arg);
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227
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228 pos = BUF_PT (buf) + XINT (arg);
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229 if (NILP (killflag))
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230 {
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231 if (XINT (arg) < 0)
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232 {
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233 if (pos < BUF_BEGV (buf))
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234 signal_error (Qbeginning_of_buffer, Qnil);
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235 else
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236 buffer_delete_range (buf, pos, BUF_PT (buf), 0);
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237 }
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238 else
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239 {
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240 if (pos > BUF_ZV (buf))
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241 signal_error (Qend_of_buffer, Qnil);
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242 else
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243 buffer_delete_range (buf, BUF_PT (buf), pos, 0);
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244 }
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245 }
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246 else
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247 {
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248 call1 (Qkill_forward_chars, arg);
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249 }
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250 return Qnil;
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251 }
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252
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20
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253 DEFUN ("delete-backward-char", Fdelete_backward_char, 1, 2, "*p\nP", /*
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0
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254 Delete the previous ARG characters (following, with negative ARG).
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255 Optional second arg KILLFLAG non-nil means kill instead (save in kill ring).
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256 Interactively, ARG is the prefix arg, and KILLFLAG is set if
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257 ARG was explicitly specified.
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20
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258 */
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259 (arg, killflag))
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0
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260 {
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261 /* This function can GC */
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262 CHECK_INT (arg);
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263 return Fdelete_char (make_int (-XINT (arg)), killflag);
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264 }
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265
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266 static void internal_self_insert (Emchar ch, int noautofill);
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267
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20
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268 DEFUN ("self-insert-command", Fself_insert_command, 1, 1, "*p", /*
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0
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269 Insert the character you type.
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270 Whichever character you type to run this command is inserted.
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20
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271 */
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272 (arg))
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0
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273 {
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274 /* This function can GC */
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275 int n;
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276 Emchar ch;
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277 Lisp_Object c;
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278 CHECK_INT (arg);
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279
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280 if (CHAR_OR_CHAR_INTP (Vlast_command_char))
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281 c = Vlast_command_char;
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282 else
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283 c = Fevent_to_character (Vlast_command_event, Qnil, Qnil, Qt);
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284
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285 if (NILP (c))
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286 signal_simple_error ("last typed character has no ASCII equivalent",
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287 Fcopy_event (Vlast_command_event, Qnil));
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288
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289 CHECK_CHAR_COERCE_INT (c);
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290
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291 n = XINT (arg);
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292 ch = XCHAR (c);
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293 #if 0 /* FSFmacs */
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294 /* #### This optimization won't work because of differences in
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295 how the start-open and end-open properties default for text
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296 properties. See internal_self_insert(). */
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297 if (n >= 2 && NILP (current_buffer->overwrite_mode))
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298 {
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299 n -= 2;
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300 /* The first one might want to expand an abbrev. */
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301 internal_self_insert (c, 1);
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302 /* The bulk of the copies of this char can be inserted simply.
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303 We don't have to handle a user-specified face specially
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304 because it will get inherited from the first char inserted. */
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305 Finsert_char (make_char (c), make_int (n), Qt, Qnil);
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306 /* The last one might want to auto-fill. */
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307 internal_self_insert (c, 0);
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308 }
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309 else
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310 #endif /* 0 */
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311 while (n > 0)
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312 {
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313 n--;
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314 internal_self_insert (ch, (n != 0));
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315 }
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316 return Qnil;
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317 }
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318
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319 /* Insert character C1. If NOAUTOFILL is nonzero, don't do autofill
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320 even if it is enabled.
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321
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322 FSF:
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323
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324 If this insertion is suitable for direct output (completely simple),
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325 return 0. A value of 1 indicates this *might* not have been simple.
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326 A value of 2 means this did things that call for an undo boundary. */
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327
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328 static void
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329 internal_self_insert (Emchar c1, int noautofill)
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330 {
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331 /* This function can GC */
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332 /* int hairy = 0; -- unused */
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333 REGISTER enum syntaxcode synt;
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334 REGISTER Emchar c2;
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335 Lisp_Object overwrite;
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70
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336 struct Lisp_Char_Table *syntax_table;
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0
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337 struct buffer *buf = current_buffer;
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185
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338
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0
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339 overwrite = buf->overwrite_mode;
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70
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340 syntax_table = XCHAR_TABLE (buf->mirror_syntax_table);
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0
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341
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342 #if 0
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343 /* No, this is very bad, it makes undo *always* undo a character at a time
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344 instead of grouping consecutive self-inserts together. Nasty nasty.
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345 */
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346 if (!NILP (Vbefore_change_functions) || !NILP (Vafter_change_functions)
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347 || !NILP (Vbefore_change_function) || !NILP (Vafter_change_function))
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348 hairy = 1;
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349 #endif
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350
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351 if (!NILP (overwrite)
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352 && BUF_PT (buf) < BUF_ZV (buf)
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353 && (EQ (overwrite, Qoverwrite_mode_binary)
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354 || (c1 != '\n' && BUF_FETCH_CHAR (buf, BUF_PT (buf)) != '\n'))
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355 && (EQ (overwrite, Qoverwrite_mode_binary)
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356 || BUF_FETCH_CHAR (buf, BUF_PT (buf)) != '\t'
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357 || XINT (buf->tab_width) <= 0
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358 || XINT (buf->tab_width) > 20
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359 || !((current_column (buf) + 1) % XINT (buf->tab_width))))
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360 {
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361 buffer_delete_range (buf, BUF_PT (buf), BUF_PT (buf) + 1, 0);
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362 /* hairy = 2; */
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363 }
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364
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365 if (!NILP (buf->abbrev_mode)
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366 && !WORD_SYNTAX_P (syntax_table, c1)
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367 && NILP (buf->read_only)
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368 && BUF_PT (buf) > BUF_BEGV (buf))
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369 {
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370 c2 = BUF_FETCH_CHAR (buf, BUF_PT (buf) - 1);
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371
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|
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372 if (WORD_SYNTAX_P (syntax_table, c2))
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373 {
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276
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374 #if 1
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375 Fexpand_abbrev ();
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376 #else /* FSFmacs */
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227
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377 Lisp_Object sym = Fexpand_abbrev ();
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|
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378
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276
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379 /* I think this is too bogus to add. The function should
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380 have a way of examining the character to be inserted, so
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381 it can decide whether to insert it or not. We should
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382 design it better than that. */
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383
|
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227
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384 /* Here FSFmacs remembers MODIFF, compares it after
|
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276
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385 Fexpand_abbrev() finishes, and updates HAIRY. */
|
|
227
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386
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276
|
387 /* NOTE: we cannot simply check for Vlast_abbrev, because
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227
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388 Fexpand_abbrev() can bail out before setting it to
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|
|
389 anything meaningful, leaving us stuck with an old value.
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390 Thus Fexpand_abbrev() was extended to return the actual
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|
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391 abbrev symbol. */
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|
|
392 if (!NILP (sym)
|
|
|
393 && !NILP (symbol_function (XSYMBOL (sym)))
|
|
|
394 && SYMBOLP (symbol_function (XSYMBOL (sym))))
|
|
|
395 {
|
|
|
396 Lisp_Object prop = Fget (symbol_function (XSYMBOL (sym)),
|
|
|
397 Qno_self_insert, Qnil);
|
|
|
398 if (!NILP (prop))
|
|
|
399 return;
|
|
|
400 }
|
|
276
|
401 #endif /* FSFmacs */
|
|
0
|
402 }
|
|
|
403 }
|
|
|
404 if ((c1 == ' ' || c1 == '\n')
|
|
|
405 && !noautofill
|
|
|
406 && !NILP (buf->auto_fill_function))
|
|
|
407 {
|
|
|
408 buffer_insert_emacs_char (buf, c1);
|
|
|
409 if (c1 == '\n')
|
|
|
410 /* After inserting a newline, move to previous line and fill */
|
|
|
411 /* that. Must have the newline in place already so filling and */
|
|
|
412 /* justification, if any, know where the end is going to be. */
|
|
|
413 BUF_SET_PT (buf, BUF_PT (buf) - 1);
|
|
|
414 call0 (buf->auto_fill_function);
|
|
|
415 if (c1 == '\n')
|
|
|
416 BUF_SET_PT (buf, BUF_PT (buf) + 1);
|
|
|
417 /* hairy = 2; */
|
|
|
418 }
|
|
|
419 else
|
|
|
420 buffer_insert_emacs_char (buf, c1);
|
|
|
421
|
|
|
422 /* If previous command specified a face to use, use it. */
|
|
|
423 if (!NILP (Vself_insert_face)
|
|
|
424 && EQ (Vlast_command, Vself_insert_face_command))
|
|
|
425 {
|
|
272
|
426 Lisp_Object before = make_int (BUF_PT (buf) - 1);
|
|
|
427 Lisp_Object after = make_int (BUF_PT (buf));
|
|
0
|
428 Fput_text_property (before, after, Qface, Vself_insert_face, Qnil);
|
|
|
429 Fput_text_property (before, after, Qstart_open, Qt, Qnil);
|
|
|
430 Fput_text_property (before, after, Qend_open, Qnil, Qnil);
|
|
|
431 /* #### FSFmacs properties are normally closed ("sticky") on the
|
|
|
432 end but not the beginning. It's the opposite for us. */
|
|
|
433 Vself_insert_face = Qnil;
|
|
|
434 }
|
|
|
435 synt = SYNTAX (syntax_table, c1);
|
|
|
436 if ((synt == Sclose || synt == Smath)
|
|
|
437 && !NILP (Vblink_paren_function) && INTERACTIVE
|
|
|
438 && !noautofill)
|
|
|
439 {
|
|
|
440 call0 (Vblink_paren_function);
|
|
|
441 /* hairy = 2; */
|
|
|
442 }
|
|
|
443
|
|
|
444 /* return hairy; */
|
|
|
445 }
|
|
|
446
|
|
|
447 /* (this comes from Mule but is a generally good idea) */
|
|
|
448
|
|
20
|
449 DEFUN ("self-insert-internal", Fself_insert_internal, 1, 1, 0, /*
|
|
0
|
450 Invoke `self-insert-command' as if CH is entered from keyboard.
|
|
20
|
451 */
|
|
|
452 (ch))
|
|
0
|
453 {
|
|
|
454 /* This function can GC */
|
|
|
455 CHECK_CHAR_COERCE_INT (ch);
|
|
|
456 internal_self_insert (XCHAR (ch), 0);
|
|
|
457 return Qnil;
|
|
|
458 }
|
|
|
459
|
|
|
460 /* module initialization */
|
|
|
461
|
|
|
462 void
|
|
|
463 syms_of_cmds (void)
|
|
|
464 {
|
|
|
465 defsymbol (&Qkill_forward_chars, "kill-forward-chars");
|
|
|
466 defsymbol (&Qself_insert_command, "self-insert-command");
|
|
|
467 defsymbol (&Qoverwrite_mode_binary, "overwrite-mode-binary");
|
|
227
|
468 defsymbol (&Qno_self_insert, "no-self-insert");
|
|
0
|
469
|
|
20
|
470 DEFSUBR (Fforward_char);
|
|
|
471 DEFSUBR (Fbackward_char);
|
|
|
472 DEFSUBR (Fforward_line);
|
|
|
473 DEFSUBR (Fbeginning_of_line);
|
|
|
474 DEFSUBR (Fend_of_line);
|
|
0
|
475
|
|
74
|
476 DEFSUBR (Fpoint_at_bol);
|
|
|
477 DEFSUBR (Fpoint_at_eol);
|
|
|
478
|
|
20
|
479 DEFSUBR (Fdelete_char);
|
|
|
480 DEFSUBR (Fdelete_backward_char);
|
|
0
|
481
|
|
20
|
482 DEFSUBR (Fself_insert_command);
|
|
|
483 DEFSUBR (Fself_insert_internal);
|
|
0
|
484 }
|
|
|
485
|
|
|
486 void
|
|
|
487 vars_of_cmds (void)
|
|
|
488 {
|
|
|
489 DEFVAR_LISP ("self-insert-face", &Vself_insert_face /*
|
|
|
490 If non-nil, set the face of the next self-inserting character to this.
|
|
|
491 See also `self-insert-face-command'.
|
|
|
492 */ );
|
|
|
493 Vself_insert_face = Qnil;
|
|
|
494
|
|
|
495 DEFVAR_LISP ("self-insert-face-command", &Vself_insert_face_command /*
|
|
|
496 This is the command that set up `self-insert-face'.
|
|
|
497 If `last-command' does not equal this value, we ignore `self-insert-face'.
|
|
|
498 */ );
|
|
|
499 Vself_insert_face_command = Qnil;
|
|
|
500
|
|
|
501 DEFVAR_LISP ("blink-paren-function", &Vblink_paren_function /*
|
|
|
502 Function called, if non-nil, whenever a close parenthesis is inserted.
|
|
|
503 More precisely, a char with closeparen syntax is self-inserted.
|
|
|
504 */ );
|
|
|
505 Vblink_paren_function = Qnil;
|
|
|
506 }
|
