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428
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1 /* Primitives for word-abbrev mode.
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2 Copyright (C) 1985, 1986, 1992, 1993 Free Software Foundation, Inc.
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793
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3 Copyright (C) 2002 Ben Wing.
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428
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4
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5 This file is part of XEmacs.
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6
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7 XEmacs is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
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12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with XEmacs; see the file COPYING. If not, write to
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19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 Boston, MA 02111-1307, USA. */
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21
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22 /* Synched up with: FSF 19.30. Note that there are many more functions in
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23 FSF's abbrev.c. These have been moved into Lisp in XEmacs. */
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24
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25 /* Authorship:
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26
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27 FSF: Original version; a long time ago.
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28 JWZ or Mly: Mostly moved into Lisp; maybe 1992.
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29 Ben Wing: Some changes for Mule for 19.12.
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30 Hrvoje Niksic: Largely rewritten in June 1997.
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31 */
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32
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33 /* This file has been Mule-ized. */
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34
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35 #include <config.h>
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36 #include "lisp.h"
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37
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38 #include "buffer.h"
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39 #include "commands.h"
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40 #include "insdel.h"
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41 #include "syntax.h"
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42 #include "window.h"
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43
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44 /* An abbrev table is an obarray.
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45 Each defined abbrev is represented by a symbol in that obarray
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46 whose print name is the abbreviation.
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47 The symbol's value is a string which is the expansion.
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48 If its function definition is non-nil, it is called
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49 after the expansion is done.
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50 The plist slot of the abbrev symbol is its usage count. */
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51
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52 /* The table of global abbrevs. These are in effect
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53 in any buffer in which abbrev mode is turned on. */
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54 Lisp_Object Vglobal_abbrev_table;
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55
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56 int abbrev_all_caps;
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57
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58 /* Non-nil => use this location as the start of abbrev to expand
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59 (rather than taking the word before point as the abbrev) */
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60 Lisp_Object Vabbrev_start_location;
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61
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62 /* Buffer that Vabbrev_start_location applies to */
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63 Lisp_Object Vabbrev_start_location_buffer;
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64
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65 /* The symbol representing the abbrev most recently expanded */
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66 Lisp_Object Vlast_abbrev;
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67
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68 /* A string for the actual text of the abbrev most recently expanded.
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69 This has more info than Vlast_abbrev since case is significant. */
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70 Lisp_Object Vlast_abbrev_text;
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71
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72 /* Character address of start of last abbrev expanded */
|
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458
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73 Fixnum last_abbrev_location;
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428
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74
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75 /* Hook to run before expanding any abbrev. */
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76 Lisp_Object Vpre_abbrev_expand_hook, Qpre_abbrev_expand_hook;
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77
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78
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826
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79 struct abbrev_match_mapper_closure
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80 {
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428
|
81 struct buffer *buf;
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826
|
82 Lisp_Object chartab;
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814
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83 Charbpos point;
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84 Charcount maxlen;
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440
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85 Lisp_Symbol *found;
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428
|
86 };
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87
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88 /* For use by abbrev_match(): Match SYMBOL's name against buffer text
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89 before point, case-insensitively. When found, return non-zero, so
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90 that map_obarray terminates mapping. */
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91 static int
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92 abbrev_match_mapper (Lisp_Object symbol, void *arg)
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|
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93 {
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|
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94 struct abbrev_match_mapper_closure *closure =
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95 (struct abbrev_match_mapper_closure *)arg;
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|
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96 Charcount abbrev_length;
|
|
440
|
97 Lisp_Symbol *sym = XSYMBOL (symbol);
|
|
793
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98 Lisp_Object abbrev;
|
|
428
|
99
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100 /* symbol_value should be OK here, because abbrevs are not expected
|
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101 to contain any SYMBOL_MAGIC stuff. */
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102 if (UNBOUNDP (symbol_value (sym)) || NILP (symbol_value (sym)))
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103 {
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104 /* The symbol value of nil means that abbrev got undefined. */
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105 return 0;
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106 }
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|
107 abbrev = symbol_name (sym);
|
|
826
|
108 abbrev_length = string_char_length (abbrev);
|
|
428
|
109 if (abbrev_length > closure->maxlen)
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|
|
110 {
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111 /* This abbrev is too large -- it wouldn't fit. */
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112 return 0;
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113 }
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114 /* If `bar' is an abbrev, and a user presses `fubar<SPC>', we don't
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115 normally want to expand it. OTOH, if the abbrev begins with
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116 non-word syntax (e.g. `#if'), it is OK to abbreviate it anywhere. */
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117 if (abbrev_length < closure->maxlen && abbrev_length > 0
|
|
867
|
118 && (WORD_SYNTAX_P (closure->chartab, string_ichar (abbrev, 0)))
|
|
428
|
119 && (WORD_SYNTAX_P (closure->chartab,
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|
120 BUF_FETCH_CHAR (closure->buf,
|
|
793
|
121 closure->point -
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|
122 (abbrev_length + 1)))))
|
|
428
|
123 {
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|
124 return 0;
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|
|
125 }
|
|
|
126 /* Match abbreviation string against buffer text. */
|
|
|
127 {
|
|
867
|
128 Ibyte *ptr = XSTRING_DATA (abbrev);
|
|
428
|
129 Charcount idx;
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130
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131 for (idx = 0; idx < abbrev_length; idx++)
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132 {
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133 if (DOWNCASE (closure->buf,
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134 BUF_FETCH_CHAR (closure->buf,
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135 closure->point - abbrev_length + idx))
|
|
867
|
136 != DOWNCASE (closure->buf, itext_ichar (ptr)))
|
|
428
|
137 {
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|
|
138 break;
|
|
|
139 }
|
|
867
|
140 INC_IBYTEPTR (ptr);
|
|
428
|
141 }
|
|
|
142 if (idx == abbrev_length)
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|
|
143 {
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|
|
144 /* This is the one. */
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|
|
145 closure->found = sym;
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|
|
146 return 1;
|
|
|
147 }
|
|
|
148 }
|
|
|
149 return 0;
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|
|
150 }
|
|
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151
|
|
|
152 /* Match the buffer text against names of symbols in obarray. Returns
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153 the matching symbol, or 0 if not found. */
|
|
440
|
154 static Lisp_Symbol *
|
|
428
|
155 abbrev_match (struct buffer *buf, Lisp_Object obarray)
|
|
|
156 {
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|
|
157 struct abbrev_match_mapper_closure closure;
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|
|
158
|
|
|
159 /* Precalculate some stuff, so mapper function needn't to it in each
|
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160 iteration. */
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|
|
161 closure.buf = buf;
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|
|
162 closure.point = BUF_PT (buf);
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|
|
163 closure.maxlen = closure.point - BUF_BEGV (buf);
|
|
826
|
164 closure.chartab = buf->mirror_syntax_table;
|
|
428
|
165 closure.found = 0;
|
|
|
166
|
|
|
167 map_obarray (obarray, abbrev_match_mapper, &closure);
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168
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|
|
169 return closure.found;
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|
|
170 }
|
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171
|
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|
172 /* Take the word before point (or Vabbrev_start_location, if non-nil),
|
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173 and look it up in OBARRAY, and return the symbol (or zero). This
|
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174 used to be the default method of searching, with the obvious
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175 limitation that the abbrevs may consist only of word characters.
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176 It is an order of magnitude faster than the proper abbrev_match(),
|
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|
177 but then again, vi is an order of magnitude faster than Emacs.
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|
178
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|
|
179 This speed difference should be unnoticeable, though. I have tested
|
|
|
180 the degenerated cases of thousands of abbrevs being defined, and
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|
|
181 abbrev_match() was still fast enough for normal operation. */
|
|
440
|
182 static Lisp_Symbol *
|
|
428
|
183 abbrev_oblookup (struct buffer *buf, Lisp_Object obarray)
|
|
|
184 {
|
|
665
|
185 Charbpos wordstart, wordend;
|
|
867
|
186 Ibyte *word, *p;
|
|
814
|
187 Charbpos idx;
|
|
428
|
188 Lisp_Object lookup;
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|
|
189
|
|
|
190 CHECK_VECTOR (obarray);
|
|
|
191
|
|
|
192 if (!NILP (Vabbrev_start_location))
|
|
|
193 {
|
|
|
194 wordstart = get_buffer_pos_char (buf, Vabbrev_start_location,
|
|
|
195 GB_COERCE_RANGE);
|
|
|
196 Vabbrev_start_location = Qnil;
|
|
|
197 #if 0
|
|
|
198 /* Previously, abbrev-prefix-mark crockishly inserted a dash to
|
|
|
199 indicate the abbrev start point. It now uses an extent with
|
|
|
200 a begin glyph so there's no dash to remove. */
|
|
|
201 if (wordstart != BUF_ZV (buf)
|
|
|
202 && BUF_FETCH_CHAR (buf, wordstart) == '-')
|
|
|
203 {
|
|
|
204 buffer_delete_range (buf, wordstart, wordstart + 1, 0);
|
|
|
205 }
|
|
|
206 #endif
|
|
|
207 wordend = BUF_PT (buf);
|
|
|
208 }
|
|
|
209 else
|
|
|
210 {
|
|
665
|
211 Charbpos point = BUF_PT (buf);
|
|
428
|
212
|
|
|
213 wordstart = scan_words (buf, point, -1);
|
|
|
214 if (!wordstart)
|
|
|
215 return 0;
|
|
|
216
|
|
|
217 wordend = scan_words (buf, wordstart, 1);
|
|
|
218 if (!wordend)
|
|
|
219 return 0;
|
|
|
220 if (wordend > BUF_ZV (buf))
|
|
|
221 wordend = BUF_ZV (buf);
|
|
|
222 if (wordend > point)
|
|
|
223 wordend = point;
|
|
|
224 /* Unlike the original function, we allow expansion only after
|
|
|
225 the abbrev, not preceded by a number of spaces. This is
|
|
|
226 because of consistency with abbrev_match. */
|
|
|
227 if (wordend < point)
|
|
|
228 return 0;
|
|
|
229 }
|
|
|
230
|
|
|
231 if (wordend <= wordstart)
|
|
|
232 return 0;
|
|
|
233
|
|
2367
|
234 p = word = alloca_ibytes (MAX_ICHAR_LEN * (wordend - wordstart));
|
|
428
|
235 for (idx = wordstart; idx < wordend; idx++)
|
|
|
236 {
|
|
867
|
237 Ichar c = BUF_FETCH_CHAR (buf, idx);
|
|
428
|
238 if (UPPERCASEP (buf, c))
|
|
|
239 c = DOWNCASE (buf, c);
|
|
867
|
240 p += set_itext_ichar (p, c);
|
|
428
|
241 }
|
|
|
242 lookup = oblookup (obarray, word, p - word);
|
|
|
243 if (SYMBOLP (lookup) && !NILP (symbol_value (XSYMBOL (lookup))))
|
|
|
244 return XSYMBOL (lookup);
|
|
|
245 else
|
|
|
246 return NULL;
|
|
|
247 }
|
|
|
248
|
|
|
249 /* Return non-zero if OBARRAY contains an interned symbol ` '. */
|
|
|
250 static int
|
|
|
251 obarray_has_blank_p (Lisp_Object obarray)
|
|
|
252 {
|
|
867
|
253 return !ZEROP (oblookup (obarray, (Ibyte *)" ", 1));
|
|
428
|
254 }
|
|
|
255
|
|
|
256 /* Analyze case in the buffer substring, and report it. */
|
|
|
257 static void
|
|
665
|
258 abbrev_count_case (struct buffer *buf, Charbpos pos, Charcount length,
|
|
428
|
259 int *lccount, int *uccount)
|
|
|
260 {
|
|
|
261 *lccount = *uccount = 0;
|
|
|
262 while (length--)
|
|
|
263 {
|
|
867
|
264 Ichar c = BUF_FETCH_CHAR (buf, pos);
|
|
428
|
265 if (UPPERCASEP (buf, c))
|
|
|
266 ++*uccount;
|
|
|
267 else if (LOWERCASEP (buf, c))
|
|
|
268 ++*lccount;
|
|
|
269 ++pos;
|
|
|
270 }
|
|
|
271 }
|
|
|
272
|
|
|
273 DEFUN ("expand-abbrev", Fexpand_abbrev, 0, 0, "", /*
|
|
|
274 Expand the abbrev before point, if any.
|
|
|
275 Effective when explicitly called even when `abbrev-mode' is nil.
|
|
|
276 Returns the abbrev symbol, if expansion took place.
|
|
|
277 If no abbrev matched, but `pre-abbrev-expand-hook' changed the buffer,
|
|
|
278 returns t.
|
|
|
279 */
|
|
|
280 ())
|
|
|
281 {
|
|
|
282 /* This function can GC */
|
|
|
283 struct buffer *buf = current_buffer;
|
|
|
284 int oldmodiff = BUF_MODIFF (buf);
|
|
|
285 Lisp_Object pre_modiff_p;
|
|
665
|
286 Charbpos point; /* position of point */
|
|
|
287 Charbpos abbrev_start; /* position of abbreviation beginning */
|
|
428
|
288
|
|
440
|
289 Lisp_Symbol *(*fun) (struct buffer *, Lisp_Object);
|
|
428
|
290
|
|
440
|
291 Lisp_Symbol *abbrev_symbol;
|
|
428
|
292 Lisp_Object expansion, count, hook;
|
|
|
293 Charcount abbrev_length;
|
|
|
294 int lccount, uccount;
|
|
|
295
|
|
|
296 run_hook (Qpre_abbrev_expand_hook);
|
|
|
297 /* If the hook changes the buffer, treat that as having "done an
|
|
|
298 expansion". */
|
|
|
299 pre_modiff_p = (BUF_MODIFF (buf) != oldmodiff ? Qt : Qnil);
|
|
|
300
|
|
|
301 abbrev_symbol = NULL;
|
|
|
302 if (!BUFFERP (Vabbrev_start_location_buffer) ||
|
|
|
303 XBUFFER (Vabbrev_start_location_buffer) != buf)
|
|
|
304 Vabbrev_start_location = Qnil;
|
|
|
305 /* We use the more general abbrev_match() if the obarray blank flag
|
|
|
306 is not set, and Vabbrev_start_location is nil. Otherwise, use
|
|
|
307 abbrev_oblookup(). */
|
|
|
308 #define MATCHFUN(tbl) ((obarray_has_blank_p (tbl) \
|
|
|
309 && NILP (Vabbrev_start_location)) \
|
|
|
310 ? abbrev_match : abbrev_oblookup)
|
|
|
311 if (!NILP (buf->abbrev_table))
|
|
|
312 {
|
|
|
313 fun = MATCHFUN (buf->abbrev_table);
|
|
|
314 abbrev_symbol = fun (buf, buf->abbrev_table);
|
|
|
315 }
|
|
|
316 if (!abbrev_symbol && !NILP (Vglobal_abbrev_table))
|
|
|
317 {
|
|
|
318 fun = MATCHFUN (Vglobal_abbrev_table);
|
|
|
319 abbrev_symbol = fun (buf, Vglobal_abbrev_table);
|
|
|
320 }
|
|
|
321 if (!abbrev_symbol)
|
|
|
322 return pre_modiff_p;
|
|
|
323
|
|
|
324 /* NOTE: we hope that `pre-abbrev-expand-hook' didn't do something
|
|
|
325 nasty, such as changed the buffer. Here we protect against the
|
|
|
326 buffer getting killed. */
|
|
|
327 if (! BUFFER_LIVE_P (buf))
|
|
|
328 return Qnil;
|
|
|
329 point = BUF_PT (buf);
|
|
|
330
|
|
|
331 /* OK, we're out of the must-be-fast part. An abbreviation matched.
|
|
|
332 Now find the parameters, insert the expansion, and make it all
|
|
|
333 look pretty. */
|
|
826
|
334 abbrev_length = string_char_length (symbol_name (abbrev_symbol));
|
|
428
|
335 abbrev_start = point - abbrev_length;
|
|
|
336
|
|
|
337 expansion = symbol_value (abbrev_symbol);
|
|
|
338 CHECK_STRING (expansion);
|
|
|
339
|
|
|
340 count = symbol_plist (abbrev_symbol); /* Gag */
|
|
|
341 if (NILP (count))
|
|
|
342 count = Qzero;
|
|
|
343 else
|
|
|
344 CHECK_NATNUM (count);
|
|
|
345 symbol_plist (abbrev_symbol) = make_int (1 + XINT (count));
|
|
|
346
|
|
|
347 /* Count the case in the original text. */
|
|
|
348 abbrev_count_case (buf, abbrev_start, abbrev_length, &lccount, &uccount);
|
|
|
349
|
|
|
350 /* Remember the last abbrev text, location, etc. */
|
|
793
|
351 Vlast_abbrev = wrap_symbol (abbrev_symbol);
|
|
428
|
352 Vlast_abbrev_text =
|
|
|
353 make_string_from_buffer (buf, abbrev_start, abbrev_length);
|
|
|
354 last_abbrev_location = abbrev_start;
|
|
|
355
|
|
|
356 /* Add an undo boundary, in case we are doing this for a
|
|
|
357 self-inserting command which has avoided making one so far. */
|
|
|
358 if (INTERACTIVE)
|
|
|
359 Fundo_boundary ();
|
|
|
360
|
|
|
361 /* Remove the abbrev */
|
|
|
362 buffer_delete_range (buf, abbrev_start, point, 0);
|
|
|
363 /* And insert the expansion. */
|
|
|
364 buffer_insert_lisp_string (buf, expansion);
|
|
|
365 point = BUF_PT (buf);
|
|
|
366
|
|
|
367 /* Now fiddle with the case. */
|
|
|
368 if (uccount && !lccount)
|
|
|
369 {
|
|
|
370 /* Abbrev was all caps */
|
|
|
371 if (!abbrev_all_caps
|
|
|
372 && scan_words (buf, point, -1) > scan_words (buf, abbrev_start, 1))
|
|
|
373 {
|
|
|
374 Fupcase_initials_region (make_int (abbrev_start), make_int (point),
|
|
771
|
375 wrap_buffer (buf));
|
|
428
|
376 }
|
|
|
377 else
|
|
|
378 {
|
|
|
379 /* If expansion is one word, or if user says so, upcase it all. */
|
|
|
380 Fupcase_region (make_int (abbrev_start), make_int (point),
|
|
771
|
381 wrap_buffer (buf));
|
|
428
|
382 }
|
|
|
383 }
|
|
|
384 else if (uccount)
|
|
|
385 {
|
|
|
386 /* Abbrev included some caps. Cap first initial of expansion */
|
|
665
|
387 Charbpos pos = abbrev_start;
|
|
428
|
388 /* Find the initial. */
|
|
|
389 while (pos < point
|
|
826
|
390 && !WORD_SYNTAX_P (buf->mirror_syntax_table,
|
|
428
|
391 BUF_FETCH_CHAR (buf, pos)))
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|
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392 pos++;
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|
|
393 /* Change just that. */
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|
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394 Fupcase_initials_region (make_int (pos), make_int (pos + 1),
|
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771
|
395 wrap_buffer (buf));
|
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428
|
396 }
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|
|
397
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|
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398 hook = symbol_function (abbrev_symbol);
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|
|
399 if (!NILP (hook) && !UNBOUNDP (hook))
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|
|
400 call0 (hook);
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401
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|
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402 return Vlast_abbrev;
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|
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403 }
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|
|
404
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|
|
405
|
|
|
406 void
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|
|
407 syms_of_abbrev (void)
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|
|
408 {
|
|
563
|
409 DEFSYMBOL (Qpre_abbrev_expand_hook);
|
|
428
|
410 DEFSUBR (Fexpand_abbrev);
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|
|
411 }
|
|
|
412
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|
|
413 void
|
|
|
414 vars_of_abbrev (void)
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|
|
415 {
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|
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416 DEFVAR_LISP ("global-abbrev-table", &Vglobal_abbrev_table /*
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|
|
417 The abbrev table whose abbrevs affect all buffers.
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|
|
418 Each buffer may also have a local abbrev table.
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|
|
419 If it does, the local table overrides the global one
|
|
|
420 for any particular abbrev defined in both.
|
|
|
421 */ );
|
|
|
422 Vglobal_abbrev_table = Qnil; /* setup by Lisp code */
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|
|
423
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|
|
424 DEFVAR_LISP ("last-abbrev", &Vlast_abbrev /*
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|
|
425 The abbrev-symbol of the last abbrev expanded.
|
|
|
426 See the function `abbrev-symbol'.
|
|
|
427 */ );
|
|
|
428
|
|
|
429 DEFVAR_LISP ("last-abbrev-text", &Vlast_abbrev_text /*
|
|
|
430 The exact text of the last abbrev expanded.
|
|
|
431 nil if the abbrev has already been unexpanded.
|
|
|
432 */ );
|
|
|
433
|
|
|
434 DEFVAR_INT ("last-abbrev-location", &last_abbrev_location /*
|
|
|
435 The location of the start of the last abbrev expanded.
|
|
|
436 */ );
|
|
|
437
|
|
|
438 Vlast_abbrev = Qnil;
|
|
|
439 Vlast_abbrev_text = Qnil;
|
|
|
440 last_abbrev_location = 0;
|
|
|
441
|
|
|
442 DEFVAR_LISP ("abbrev-start-location", &Vabbrev_start_location /*
|
|
|
443 Buffer position for `expand-abbrev' to use as the start of the abbrev.
|
|
|
444 nil means use the word before point as the abbrev.
|
|
|
445 Calling `expand-abbrev' sets this to nil.
|
|
|
446 */ );
|
|
|
447 Vabbrev_start_location = Qnil;
|
|
|
448
|
|
|
449 DEFVAR_LISP ("abbrev-start-location-buffer", &Vabbrev_start_location_buffer /*
|
|
|
450 Buffer that `abbrev-start-location' has been set for.
|
|
|
451 Trying to expand an abbrev in any other buffer clears `abbrev-start-location'.
|
|
|
452 */ );
|
|
|
453 Vabbrev_start_location_buffer = Qnil;
|
|
|
454
|
|
|
455 DEFVAR_BOOL ("abbrev-all-caps", &abbrev_all_caps /*
|
|
|
456 *Non-nil means expand multi-word abbrevs all caps if abbrev was so.
|
|
|
457 */ );
|
|
|
458 abbrev_all_caps = 0;
|
|
|
459
|
|
|
460 DEFVAR_LISP ("pre-abbrev-expand-hook", &Vpre_abbrev_expand_hook /*
|
|
|
461 Function or functions to be called before abbrev expansion is done.
|
|
|
462 This is the first thing that `expand-abbrev' does, and so this may change
|
|
|
463 the current abbrev table before abbrev lookup happens.
|
|
|
464 */ );
|
|
|
465 Vpre_abbrev_expand_hook = Qnil;
|
|
|
466 }
|
