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;;; poem-om.el --- poem implementation for Mule 1.* and Mule 2.*
;; Copyright (C) 1995,1996,1997,1998,1999 Free Software Foundation, Inc.
;; Author: MORIOKA Tomohiko <>
;; Katsumi Yamaoka <>
;; Keywords: emulation, compatibility, Mule
;; This file is part of APEL (A Portable Emacs Library).
;; This program is free software; you can redistribute it and/or
;; modify it under the terms of the GNU General Public License as
;; published by the Free Software Foundation; either version 2, or (at
;; your option) any later version.
;; This program is distributed in the hope that it will be useful, but
;; WITHOUT ANY WARRANTY; without even the implied warranty of
;; General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Code:
(require 'poe)
;;; @ version specific features
(if (= emacs-major-version 19)
;; Suggested by SASAKI Osamu <>
;; (cf. [os2-emacs-ja:78])
(defun fontset-pixel-size (fontset)
(let* ((font (get-font-info
(aref (cdr (get-fontset-info fontset)) 0)))
(open (aref font 4)))
(if (= open 1)
(aref font 5)
(if (= open 0)
(let ((pat (aref font 1)))
(if (string-match "-[0-9]+-" pat)
pat (1+ (match-beginning 0)) (1- (match-end 0))))
;;; @ character set
(defalias 'make-char 'make-character)
(defalias 'find-non-ascii-charset-string 'find-charset-string)
(defalias 'find-non-ascii-charset-region 'find-charset-region)
(defalias 'charset-bytes 'char-bytes)
(defalias 'charset-description 'char-description)
(defalias 'charset-registry 'char-registry)
(defalias 'charset-columns 'char-width)
(defalias 'charset-direction 'char-direction)
(defun charset-chars (charset)
"Return the number of characters per dimension of CHARSET."
(if (= (logand (nth 2 (character-set charset)) 1) 1)
;;; @ buffer representation
(defsubst-maybe set-buffer-multibyte (flag)
"Set the multibyte flag of the current buffer to FLAG.
If FLAG is t, this makes the buffer a multibyte buffer.
If FLAG is nil, this makes the buffer a single-byte buffer.
The buffer contents remain unchanged as a sequence of bytes
but the contents viewed as characters do change.
\[Emacs 20.3 emulating function]"
(setq mc-flag flag)
;;; @ character
(defalias 'char-charset 'char-leading-char)
(defun split-char (character)
"Return list of charset and one or two position-codes of CHARACTER."
(let ((p (1- (char-bytes character)))
(while (>= p 1)
(setq dest (cons (- (char-component character p) 128) dest)
p (1- p)))
(cons (char-charset character) dest)))
(defmacro char-next-index (char index)
"Return index of character succeeding CHAR whose index is INDEX."
(` (+ (, index) (char-bytes (, char)))))
;;; @@ obsoleted aliases
;;; You should not use them.
(defalias 'char-length 'char-bytes)
;;(defalias 'char-columns 'char-width)
;;; @ string
(defalias 'string-columns 'string-width)
(defalias 'string-to-int-list 'string-to-char-list)
;; Imported from Mule-2.3
(defun-maybe truncate-string (str width &optional start-column)
Truncate STR to fit in WIDTH columns.
Optional non-nil arg START-COLUMN specifies the starting column.
\[emu-mule.el; Mule 2.3 emulating function]"
(or start-column
(setq start-column 0))
(let ((max-width (string-width str))
(len (length str))
(from 0)
(column 0)
to-prev to ch)
(if (>= width max-width)
(setq width max-width))
(if (>= start-column width)
(while (< column start-column)
(setq ch (aref str from)
column (+ column (char-width ch))
from (+ from (char-bytes ch))))
(if (< width max-width)
(setq to from)
(while (<= column width)
(setq ch (aref str to)
column (+ column (char-width ch))
to-prev to
to (+ to (char-bytes ch))))
(setq to to-prev)))
(substring str from to))))
(defalias 'looking-at-as-unibyte 'looking-at)
;;; @ end
(provide 'poem-om)
;;; poem-om.el ends here
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