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;;; poem-om.el --- poem implementation for Mule 1.* and Mule 2.*
;; Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc.
;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
;; Katsumi Yamaoka <yamaoka@jpl.org>
;; 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
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;; 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
;;;
(cond ((= emacs-major-version 19)
;; Suggested by SASAKI Osamu <osamu@shuugr.bekkoame.or.jp>
;; (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)
(string-to-number
(substring
pat (1+ (match-beginning 0)) (1- (match-end 0))))
0))
))))
(define-ccl-program poem-ccl-decode-raw-text
'(1
((read r1 r0)
(loop
(r2 = (r1 == ?\x0d))
(r2 &= (r0 == ?\x0a))
(if r2
((write ?\x0a)
(read r1 r0)
(repeat))
((write r1)
(r1 = (r0 + 0))
(read r0)
(repeat)
))))
(write r1))
"Convert line-break code from CRLF to LF.")
(define-ccl-program poem-ccl-encode-raw-text
'(1
((read r0)
(loop (write-read-repeat r0))))
"Pass through without any conversions.")
(define-ccl-program poem-ccl-encode-raw-text-CRLF
'(2
((loop
(read r0)
(if (r0 == ?\x0a)
(write "\x0d\x0a")
(write r0))
(repeat))))
"Convert line-break code from LF to CRLF.")
(make-coding-system
'raw-text 4 ?=
"No conversion"
nil
(cons poem-ccl-decode-raw-text poem-ccl-encode-raw-text))
(make-coding-system
'raw-text-dos 4 ?=
"No conversion"
nil
(cons poem-ccl-decode-raw-text poem-ccl-encode-raw-text-CRLF))
)
(t
(defun poem-decode-raw-text (from to)
(save-restriction
(narrow-to-region from to)
(goto-char (point-min))
(while (re-search-forward "\r$" nil t)
(replace-match "")
)))
(defun poem-encode-raw-text-CRLF (from to)
(save-restriction
(narrow-to-region from to)
(goto-char (point-min))
(while (re-search-forward "\\(\\=\\|[^\r]\\)\n" nil t)
(replace-match "\\1\r\n")
)))
(make-coding-system 'raw-text nil ?= "No conversion")
(put 'raw-text 'post-read-conversion 'poem-decode-raw-text)
(make-coding-system 'raw-text-dos nil ?= "No conversion")
(put 'raw-text-dos 'post-read-conversion 'poem-decode-raw-text)
(put 'raw-text-dos 'pre-write-conversion 'poem-encode-raw-text-CRLF)
))
;;; @ 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)
96
94))
;;; @ coding system
;;;
(defun encode-coding-region (start end coding-system)
"Encode the text between START and END to CODING-SYSTEM.
\[EMACS 20 emulating function]"
;; If `coding-system' is nil, do nothing.
(code-convert-region start end *internal* coding-system))
(defun decode-coding-region (start end coding-system)
"Decode the text between START and END which is encoded in CODING-SYSTEM.
\[EMACS 20 emulating function]"
;; If `coding-system' is nil, do nothing.
(code-convert-region start end coding-system *internal*))
;; XXX: Should we support optional NOCOPY argument? (only in Emacs 20.x)
(defun encode-coding-string (str coding-system)
"Encode the STRING to CODING-SYSTEM.
\[EMACS 20 emulating function]"
(if coding-system
(code-convert-string str *internal* coding-system)
;;(code-convert-string str *internal* nil) returns nil instead of str.
str))
;; XXX: Should we support optional NOCOPY argument? (only in Emacs 20.x)
(defun decode-coding-string (str coding-system)
"Decode the string STR which is encoded in CODING-SYSTEM.
\[EMACS 20 emulating function]"
(if coding-system
(let ((len (length str))
ret)
(while (and (< 0 len)
(null (setq ret
(code-convert-string
(substring str 0 len)
coding-system *internal*))))
(setq len (1- len)))
(concat ret (substring str len)))
str))
(defalias 'detect-coding-region 'code-detect-region)
(defalias 'set-buffer-file-coding-system 'set-file-coding-system)
;;; @ with code-conversion
;;;
(defun insert-file-contents-as-coding-system
(coding-system filename &optional visit beg end replace)
"Like `insert-file-contents', q.v., but CODING-SYSTEM the first arg will
be applied to `file-coding-system-for-read'."
(let ((file-coding-system-for-read coding-system))
(insert-file-contents filename visit beg end replace)))
(cond
((and (>= emacs-major-version 19) (>= emacs-minor-version 29))
;; for MULE 2.3 based on Emacs 19.34.
(defun write-region-as-coding-system
(coding-system start end filename &optional append visit lockname)
"Like `write-region', q.v., but CODING-SYSTEM the first arg will be
applied to `file-coding-system'."
(let ((file-coding-system coding-system)
jka-compr-compression-info-list jam-zcat-filename-list)
(write-region start end filename append visit lockname)))
(defun find-file-noselect-as-coding-system
(coding-system filename &optional nowarn rawfile)
"Like `find-file-noselect', q.v., but CODING-SYSTEM the first arg will
be applied to `file-coding-system-for-read'."
(let ((file-coding-system-for-read coding-system))
(find-file-noselect filename nowarn rawfile)))
)
(t
;; for MULE 2.3 based on Emacs 19.28 or MULE 1.*.
(defun write-region-as-coding-system
(coding-system start end filename &optional append visit lockname)
"Like `write-region', q.v., but CODING-SYSTEM the first arg will be
applied to `file-coding-system'."
(let ((file-coding-system coding-system)
jka-compr-compression-info-list jam-zcat-filename-list)
(write-region start end filename append visit)))
(defun find-file-noselect-as-coding-system
(coding-system filename &optional nowarn rawfile)
"Like `find-file-noselect', q.v., but CODING-SYSTEM the first arg will
be applied to `file-coding-system-for-read'."
(let ((file-coding-system-for-read coding-system))
(find-file-noselect filename nowarn)))
))
;;; @ without code-conversion
;;;
(make-coding-system 'binary nil ?= "No conversion")
(defmacro as-binary-process (&rest body)
(` (let (selective-display ; Disable ^M to nl translation.
;; Mule
mc-flag
(default-process-coding-system (cons *noconv* *noconv*))
program-coding-system-alist)
(,@ body))))
(defmacro as-binary-input-file (&rest body)
(` (let (mc-flag
(file-coding-system-for-read *noconv*)
)
(,@ body))))
(defmacro as-binary-output-file (&rest body)
(` (let (mc-flag
(file-coding-system *noconv*)
)
(,@ body))))
(defalias 'set-process-input-coding-system 'set-process-coding-system)
(defun insert-binary-file-contents-literally (filename
&optional visit beg end replace)
"Like `insert-file-contents-literally', q.v., but don't code conversion.
A buffer may be modified in several ways after reading into the buffer due
to advanced Emacs features, such as file-name-handlers, format decoding,
find-file-hooks, etc.
This function ensures that none of these modifications will take place."
(as-binary-input-file
;; Returns list absolute file name and length of data inserted.
(insert-file-contents-literally filename visit beg end replace)))
(defun insert-file-contents-as-binary (filename
&optional visit beg end replace)
"Like `insert-file-contents', q.v., but don't code and format conversion.
Like `insert-file-contents-literary', but it allows find-file-hooks,
automatic uncompression, etc.
Namely this function ensures that only format decoding and character
code conversion will not take place."
(as-binary-input-file
;; Returns list absolute file name and length of data inserted.
(insert-file-contents filename visit beg end replace)))
(defun insert-file-contents-as-raw-text (filename
&optional visit beg end replace)
"Like `insert-file-contents', q.v., but don't code and format conversion.
Like `insert-file-contents-literary', but it allows find-file-hooks,
automatic uncompression, etc.
Like `insert-file-contents-as-binary', but it converts line-break
code."
;; Returns list absolute file name and length of data inserted.
(insert-file-contents-as-coding-system 'raw-text
filename visit beg end replace))
(defun write-region-as-binary (start end filename
&optional append visit lockname)
"Like `write-region', q.v., but don't code conversion."
(write-region-as-coding-system 'binary
start end filename append visit lockname))
(defun write-region-as-raw-text-CRLF (start end filename
&optional append visit lockname)
"Like `write-region', q.v., but don't code conversion."
(write-region-as-coding-system 'raw-text-dos
start end filename append visit lockname))
(defun open-network-stream-as-binary (name buffer host service)
"Like `open-network-stream', q.v., but don't code conversion."
(let ((process (open-network-stream name buffer host service)))
(set-process-coding-system process *noconv* *noconv*)
process))
(defun find-file-noselect-as-binary (filename &optional nowarn rawfile)
"Like `find-file-noselect', q.v., but don't code and format conversion."
(find-file-noselect-as-coding-system 'binary filename nowarn rawfile))
(defun find-file-noselect-as-raw-text (filename &optional nowarn rawfile)
"Like `find-file-noselect', q.v., but it does not code and format
conversion except for line-break code."
(find-file-noselect-as-coding-system 'raw-text filename nowarn rawfile))
;;; @ 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)))
dest)
(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)))))
(if (subr-fboundp 'char-before)
(condition-case err
(char-before)
(error
(when (and (eq (car (get (car err) 'error-conditions))
'wrong-number-of-arguments)
(not (boundp 'si:char-before)))
(fset 'si:char-before (symbol-function 'char-before))
(defun char-before (&optional pos)
"Return character in current buffer preceding position POS.
POS is an integer or a buffer pointer.
If POS is out of range, the value is nil."
(si:char-before (or pos (point)))
)))))
(if (subr-fboundp 'char-after)
(condition-case err
(char-after)
(error
(when (and (eq (car (get (car err) 'error-conditions))
'wrong-number-of-arguments)
(not (boundp 'si:char-after)))
(fset 'si:char-after (symbol-function 'char-after))
(defun char-after (&optional pos)
"Return character in current buffer at position POS.
POS is an integer or a buffer pointer.
If POS is out of range, the value is nil."
(si:char-after (or pos (point)))
)))))
;;; @@ 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)
(progn
(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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