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