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