1 | ;;; poem-ltn1.el --- poem implementation for Emacs 19 and XEmacs without MULE |
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2 | |
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3 | ;; Copyright (C) 1995,1996,1997,1998,1999 Free Software Foundation, Inc. |
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4 | |
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5 | ;; Author: MORIOKA Tomohiko <tomo@m17n.org> |
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6 | ;; Keywords: emulation, compatibility, Mule |
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7 | |
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8 | ;; This file is part of APEL (A Portable Emacs Library). |
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9 | |
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10 | ;; This program is free software; you can redistribute it and/or |
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11 | ;; modify it under the terms of the GNU General Public License as |
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12 | ;; published by the Free Software Foundation; either version 2, or (at |
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13 | ;; your option) any later version. |
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14 | |
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15 | ;; This program is distributed in the hope that it will be useful, but |
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16 | ;; WITHOUT ANY WARRANTY; without even the implied warranty of |
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17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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18 | ;; General Public License for more details. |
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19 | |
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20 | ;; You should have received a copy of the GNU General Public License |
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21 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
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22 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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23 | ;; Boston, MA 02111-1307, USA. |
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24 | |
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25 | ;;; Code: |
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26 | |
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27 | ;;; @ buffer representation |
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28 | ;;; |
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29 | |
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30 | (eval-when-compile |
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31 | (require 'poe)) |
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32 | |
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33 | (defun-maybe set-buffer-multibyte (flag) |
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34 | "Set the multibyte flag of the current buffer to FLAG. |
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35 | If FLAG is t, this makes the buffer a multibyte buffer. |
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36 | If FLAG is nil, this makes the buffer a single-byte buffer. |
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37 | The buffer contents remain unchanged as a sequence of bytes |
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38 | but the contents viewed as characters do change. |
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39 | \[Emacs 20.3 emulating macro]" |
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40 | ) |
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41 | |
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42 | |
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43 | ;;; @ character set |
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44 | ;;; |
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45 | |
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46 | (put 'ascii 'charset-description "Character set of ASCII") |
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47 | (put 'ascii 'charset-registry "ASCII") |
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48 | |
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49 | (put 'latin-iso8859-1 'charset-description "Character set of ISO-8859-1") |
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50 | (put 'latin-iso8859-1 'charset-registry "ISO8859-1") |
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51 | |
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52 | (defun charset-description (charset) |
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53 | "Return description of CHARSET." |
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54 | (get charset 'charset-description)) |
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55 | |
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56 | (defun charset-registry (charset) |
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57 | "Return registry name of CHARSET." |
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58 | (get charset 'charset-registry)) |
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59 | |
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60 | (defun charset-width (charset) |
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61 | "Return number of columns a CHARSET occupies when displayed." |
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62 | 1) |
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63 | |
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64 | (defun charset-direction (charset) |
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65 | "Return the direction of a character of CHARSET by |
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66 | 0 (left-to-right) or 1 (right-to-left)." |
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67 | 0) |
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68 | |
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69 | (defun find-charset-string (str) |
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70 | "Return a list of charsets in the string." |
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71 | (if (string-match "[\200-\377]" str) |
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72 | '(latin-iso8859-1) |
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73 | )) |
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74 | |
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75 | (defalias 'find-non-ascii-charset-string 'find-charset-string) |
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76 | |
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77 | (defun find-charset-region (start end) |
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78 | "Return a list of charsets in the region between START and END." |
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79 | (if (save-excursion |
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80 | (goto-char start) |
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81 | (re-search-forward "[\200-\377]" end t)) |
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82 | '(latin-iso8859-1) |
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83 | )) |
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84 | |
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85 | (defalias 'find-non-ascii-charset-region 'find-charset-region) |
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86 | |
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87 | |
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88 | ;;; @ character |
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89 | ;;; |
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90 | |
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91 | (defun char-charset (char) |
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92 | "Return the character set of char CHAR." |
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93 | (if (< char 128) |
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94 | 'ascii |
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95 | 'latin-iso8859-1)) |
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96 | |
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97 | (defun char-bytes (char) |
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98 | "Return number of bytes a character in CHAR occupies in a buffer." |
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99 | 1) |
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100 | |
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101 | (defun char-width (char) |
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102 | "Return number of columns a CHAR occupies when displayed." |
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103 | 1) |
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104 | |
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105 | (defun split-char (character) |
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106 | "Return list of charset and one or two position-codes of CHARACTER." |
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107 | (cons (char-charset character) character)) |
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108 | |
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109 | (defalias 'char-length 'char-bytes) |
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110 | |
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111 | (defmacro char-next-index (char index) |
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112 | "Return index of character succeeding CHAR whose index is INDEX." |
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113 | (` (1+ (, index)))) |
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114 | |
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115 | |
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116 | ;;; @ string |
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117 | ;;; |
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118 | |
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119 | (defalias 'string-width 'length) |
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120 | |
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121 | (defun string-to-char-list (str) |
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122 | (mapcar (function identity) str)) |
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123 | |
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124 | (defalias 'string-to-int-list 'string-to-char-list) |
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125 | |
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126 | (defalias 'sref 'aref) |
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127 | |
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128 | (defun truncate-string (str width &optional start-column) |
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129 | "Truncate STR to fit in WIDTH columns. |
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130 | Optional non-nil arg START-COLUMN specifies the starting column. |
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131 | \[emu-latin1.el; MULE 2.3 emulating function]" |
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132 | (or start-column |
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133 | (setq start-column 0)) |
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134 | (substring str start-column width)) |
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135 | |
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136 | (defalias 'looking-at-as-unibyte 'looking-at) |
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137 | |
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138 | ;;; @@ obsoleted aliases |
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139 | ;;; |
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140 | ;;; You should not use them. |
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141 | |
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142 | (defalias 'string-columns 'length) |
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143 | (make-obsolete 'string-columns 'string-width) |
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144 | |
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145 | |
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146 | ;;; @ end |
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147 | ;;; |
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148 | |
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149 | (require 'product) |
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150 | (product-provide (provide 'poem-ltn1) (require 'apel-ver)) |
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151 | |
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152 | ;;; poem-ltn1.el ends here |
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