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428
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1 /* XEmacs case conversion functions.
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2 Copyright (C) 1985, 1992, 1993, 1994, 1997, 1998 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: FSF 19.34, but substantially rewritten by Martin. */
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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
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26 #include "buffer.h"
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27 #include "insdel.h"
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28 #include "syntax.h"
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29
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30 enum case_action {CASE_UP, CASE_DOWN, CASE_CAPITALIZE, CASE_CAPITALIZE_UP};
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31
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32 static Lisp_Object
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33 casify_object (enum case_action flag, Lisp_Object obj, Lisp_Object buffer)
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34 {
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35 struct buffer *buf = decode_buffer (buffer, 0);
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36
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37 retry:
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38
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39 if (CHAR_OR_CHAR_INTP (obj))
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40 {
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41 Emchar c;
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42 CHECK_CHAR_COERCE_INT (obj);
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43 c = XCHAR (obj);
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44 c = (flag == CASE_DOWN) ? DOWNCASE (buf, c) : UPCASE (buf, c);
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45 return make_char (c);
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46 }
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47
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48 if (STRINGP (obj))
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49 {
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50 struct Lisp_Char_Table *syntax_table =
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51 XCHAR_TABLE (buf->mirror_syntax_table);
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52 Bufbyte *storage =
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53 alloca_array (Bufbyte, XSTRING_LENGTH (obj) * MAX_EMCHAR_LEN);
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54 Bufbyte *newp = storage;
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55 Bufbyte *oldp = XSTRING_DATA (obj);
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56 int wordp = 0, wordp_prev;
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57
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58 while (*oldp)
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59 {
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60 Emchar c = charptr_emchar (oldp);
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61 switch (flag)
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62 {
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63 case CASE_UP:
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64 c = UPCASE (buf, c);
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65 break;
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66 case CASE_DOWN:
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67 c = DOWNCASE (buf, c);
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68 break;
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69 case CASE_CAPITALIZE:
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70 case CASE_CAPITALIZE_UP:
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71 wordp_prev = wordp;
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72 wordp = WORD_SYNTAX_P (syntax_table, c);
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73 if (!wordp) break;
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74 if (wordp_prev)
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75 {
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76 if (flag == CASE_CAPITALIZE)
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77 c = DOWNCASE (buf, c);
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78 }
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79 else
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80 c = UPCASE (buf, c);
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81 break;
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82 }
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83
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84 newp += set_charptr_emchar (newp, c);
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85 INC_CHARPTR (oldp);
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86 }
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87
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88 return make_string (storage, newp - storage);
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89 }
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90
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91 obj = wrong_type_argument (Qchar_or_string_p, obj);
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92 goto retry;
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93 }
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94
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95 DEFUN ("upcase", Fupcase, 1, 2, 0, /*
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96 Convert OBJECT to upper case and return that.
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97 OBJECT may be a character or string. The result has the same type.
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98 OBJECT is not altered--the value is a copy.
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99 See also `capitalize', `downcase' and `upcase-initials'.
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100 Optional second arg BUFFER specifies which buffer's case tables to use,
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101 and defaults to the current buffer.
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102 */
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103 (object, buffer))
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104 {
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105 return casify_object (CASE_UP, object, buffer);
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106 }
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107
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108 DEFUN ("downcase", Fdowncase, 1, 2, 0, /*
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109 Convert OBJECT to lower case and return that.
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110 OBJECT may be a character or string. The result has the same type.
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111 OBJECT is not altered--the value is a copy.
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112 Optional second arg BUFFER specifies which buffer's case tables to use,
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113 and defaults to the current buffer.
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114 */
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115 (object, buffer))
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116 {
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117 return casify_object (CASE_DOWN, object, buffer);
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118 }
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119
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120 DEFUN ("capitalize", Fcapitalize, 1, 2, 0, /*
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121 Convert OBJECT to capitalized form and return that.
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122 This means that each word's first character is upper case
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123 and the rest is lower case.
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124 OBJECT may be a character or string. The result has the same type.
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125 OBJECT is not altered--the value is a copy.
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126 Optional second arg BUFFER specifies which buffer's case tables to use,
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127 and defaults to the current buffer.
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128 */
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129 (object, buffer))
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130 {
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131 return casify_object (CASE_CAPITALIZE, object, buffer);
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132 }
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133
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134 /* Like Fcapitalize but change only the initial characters. */
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135
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136 DEFUN ("upcase-initials", Fupcase_initials, 1, 2, 0, /*
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137 Convert the initial of each word in OBJECT to upper case.
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138 Do not change the other letters of each word.
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139 OBJECT may be a character or string. The result has the same type.
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140 OBJECT is not altered--the value is a copy.
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141 Optional second arg BUFFER specifies which buffer's case tables to use,
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142 and defaults to the current buffer.
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143 */
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144 (object, buffer))
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145 {
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146 return casify_object (CASE_CAPITALIZE_UP, object, buffer);
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147 }
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148
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149 /* flag is CASE_UP, CASE_DOWN or CASE_CAPITALIZE or CASE_CAPITALIZE_UP.
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150 b and e specify range of buffer to operate on. */
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151
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152 static void
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153 casify_region_internal (enum case_action flag, Lisp_Object b, Lisp_Object e,
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154 struct buffer *buf)
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155 {
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156 /* This function can GC */
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157 REGISTER Bufpos i;
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158 Bufpos start, end;
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159 struct Lisp_Char_Table *syntax_table = XCHAR_TABLE (buf->mirror_syntax_table);
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160 int mccount;
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161 Emchar oldc, c;
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162 int wordp = 0, wordp_prev;
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163
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164 if (EQ (b, e))
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165 /* Not modifying because nothing marked */
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166 return;
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167
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168 get_buffer_range_char (buf, b, e, &start, &end, 0);
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169
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170 mccount = begin_multiple_change (buf, start, end);
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171 record_change (buf, start, end - start);
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172
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173 for (i = start; i < end; i++)
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174 {
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175 c = oldc = BUF_FETCH_CHAR (buf, i);
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176
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177 switch (flag)
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178 {
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179 case CASE_UP:
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180 c = UPCASE (buf, oldc);
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181 break;
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182 case CASE_DOWN:
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183 c = DOWNCASE (buf, oldc);
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184 break;
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185 case CASE_CAPITALIZE:
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186 case CASE_CAPITALIZE_UP:
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187 /* !!#### need to revalidate the start and end pointers in case
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188 the buffer was changed */
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189 wordp_prev = wordp;
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190 wordp = WORD_SYNTAX_P (syntax_table, c);
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191 if (!wordp) continue;
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192 if (wordp_prev)
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193 {
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194 if (flag == CASE_CAPITALIZE)
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195 c = DOWNCASE (buf, c);
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196 }
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197 else
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198 c = UPCASE (buf, c);
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199 break;
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200 }
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201
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202 if (oldc == c) continue;
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203 buffer_replace_char (buf, i, c, 1, (i == start));
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204 BUF_MODIFF (buf)++;
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205 }
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206
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207 end_multiple_change (buf, mccount);
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208 }
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209
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210 static Lisp_Object
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211 casify_region (enum case_action flag, Lisp_Object b, Lisp_Object e,
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212 Lisp_Object buffer)
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213 {
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214 casify_region_internal (flag, b, e, decode_buffer (buffer, 1));
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215 return Qnil;
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216 }
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217
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218 DEFUN ("upcase-region", Fupcase_region, 2, 3, "r", /*
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219 Convert the region to upper case. In programs, wants two arguments.
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220 These arguments specify the starting and ending character numbers of
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221 the region to operate on. When used as a command, the text between
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222 point and the mark is operated on.
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223 See also `capitalize-region'.
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224 Optional third arg BUFFER defaults to the current buffer.
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225 */
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226 (b, e, buffer))
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227 {
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228 /* This function can GC */
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229 return casify_region (CASE_UP, b, e, buffer);
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230 }
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231
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232 DEFUN ("downcase-region", Fdowncase_region, 2, 3, "r", /*
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233 Convert the region to lower case. In programs, wants two arguments.
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234 These arguments specify the starting and ending character numbers of
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235 the region to operate on. When used as a command, the text between
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236 point and the mark is operated on.
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237 Optional third arg BUFFER defaults to the current buffer.
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238 */
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239 (b, e, buffer))
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240 {
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241 /* This function can GC */
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242 return casify_region (CASE_DOWN, b, e, buffer);
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243 }
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244
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245 DEFUN ("capitalize-region", Fcapitalize_region, 2, 3, "r", /*
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246 Convert the region to capitalized form.
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247 Capitalized form means each word's first character is upper case
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248 and the rest of it is lower case.
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249 In programs, give two arguments, the starting and ending
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250 character positions to operate on.
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251 Optional third arg BUFFER defaults to the current buffer.
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252 */
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253 (b, e, buffer))
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254 {
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255 /* This function can GC */
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256 return casify_region (CASE_CAPITALIZE, b, e, buffer);
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257 }
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258
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259 /* Like Fcapitalize_region but change only the initials. */
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260
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261 DEFUN ("upcase-initials-region", Fupcase_initials_region, 2, 3, "r", /*
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262 Upcase the initial of each word in the region.
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263 Subsequent letters of each word are not changed.
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264 In programs, give two arguments, the starting and ending
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265 character positions to operate on.
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266 Optional third arg BUFFER defaults to the current buffer.
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267 */
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268 (b, e, buffer))
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269 {
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270 return casify_region (CASE_CAPITALIZE_UP, b, e, buffer);
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271 }
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272
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273
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274 static Lisp_Object
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275 casify_word (enum case_action flag, Lisp_Object arg, Lisp_Object buffer)
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276 {
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277 Bufpos farend;
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278 struct buffer *buf = decode_buffer (buffer, 1);
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279
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280 CHECK_INT (arg);
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281
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282 farend = scan_words (buf, BUF_PT (buf), XINT (arg));
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283 if (!farend)
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284 farend = XINT (arg) > 0 ? BUF_ZV (buf) : BUF_BEGV (buf);
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285
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286 casify_region_internal (flag, make_int (BUF_PT (buf)), make_int (farend), buf);
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287 BUF_SET_PT (buf, max (BUF_PT (buf), farend));
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288 return Qnil;
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289 }
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290
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291 DEFUN ("upcase-word", Fupcase_word, 1, 2, "p", /*
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292 Convert following word (or N words) to upper case, moving over.
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293 With negative argument, convert previous words but do not move.
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294 See also `capitalize-word'.
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295 Optional second arg BUFFER defaults to the current buffer.
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296 */
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297 (n, buffer))
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298 {
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299 /* This function can GC */
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300 return casify_word (CASE_UP, n, buffer);
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301 }
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302
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303 DEFUN ("downcase-word", Fdowncase_word, 1, 2, "p", /*
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304 Convert following word (or N words) to lower case, moving over.
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305 With negative argument, convert previous words but do not move.
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306 Optional second arg BUFFER defaults to the current buffer.
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307 */
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308 (n, buffer))
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309 {
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310 /* This function can GC */
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311 return casify_word (CASE_DOWN, n, buffer);
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312 }
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313
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314 DEFUN ("capitalize-word", Fcapitalize_word, 1, 2, "p", /*
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315 Capitalize the following word (or N words), moving over.
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316 This gives the word(s) a first character in upper case
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317 and the rest lower case.
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318 With negative argument, capitalize previous words but do not move.
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319 Optional second arg BUFFER defaults to the current buffer.
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320 */
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321 (n, buffer))
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322 {
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323 /* This function can GC */
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324 return casify_word (CASE_CAPITALIZE, n, buffer);
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325 }
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326
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327
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328 void
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329 syms_of_casefiddle (void)
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330 {
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331 DEFSUBR (Fupcase);
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332 DEFSUBR (Fdowncase);
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333 DEFSUBR (Fcapitalize);
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334 DEFSUBR (Fupcase_initials);
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335 DEFSUBR (Fupcase_region);
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336 DEFSUBR (Fdowncase_region);
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337 DEFSUBR (Fcapitalize_region);
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338 DEFSUBR (Fupcase_initials_region);
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339 DEFSUBR (Fupcase_word);
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340 DEFSUBR (Fdowncase_word);
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341 DEFSUBR (Fcapitalize_word);
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342 }
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