mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-22 10:26:20 +00:00
116 lines
3.8 KiB
EmacsLisp
116 lines
3.8 KiB
EmacsLisp
;; Functions for dealing with char tables.
|
|
;; Copyright (C) 1987 Free Software Foundation, Inc.
|
|
|
|
;; This file is part of GNU Emacs.
|
|
|
|
;; GNU Emacs 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 1, or (at your option)
|
|
;; any later version.
|
|
|
|
;; GNU Emacs 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, 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
|
|
|
|
;; Written by Howard Gayle. See case-table.el for details.
|
|
|
|
(require 'case-table)
|
|
|
|
(defun rope-to-vector (rope)
|
|
(let* ((len (/ (length rope) 2))
|
|
(vector (make-vector len nil))
|
|
(i 0))
|
|
(while (< i len)
|
|
(aset vector i (rope-elt rope i))
|
|
(setq i (1+ i)))))
|
|
|
|
(defun describe-display-table (DT)
|
|
"Describe the display-table DT in a help buffer."
|
|
(with-output-to-temp-buffer "*Help*"
|
|
(princ "\nTruncation glyf: ")
|
|
(prin1 (aref dt 256))
|
|
(princ "\nWrap glyf: ")
|
|
(prin1 (aref dt 257))
|
|
(princ "\nEscape glyf: ")
|
|
(prin1 (aref dt 258))
|
|
(princ "\nCtrl glyf: ")
|
|
(prin1 (aref dt 259))
|
|
(princ "\nSelective display rope: ")
|
|
(prin1 (rope-to-vector (aref dt 260)))
|
|
(princ "\nCharacter display ropes:\n")
|
|
(let ((vector (make-vector 256 nil))
|
|
(i 0))
|
|
(while (< i 256)
|
|
(aset vector i
|
|
(if (stringp (aref dt i))
|
|
(rope-to-vector (aref dt i))
|
|
(aref dt i)))
|
|
(setq i (1+ i)))
|
|
(describe-vector vector))
|
|
(print-help-return-message)))
|
|
|
|
(defun describe-current-display-table ()
|
|
"Describe the display-table in use in the selected window and buffer."
|
|
(interactive)
|
|
(describe-display-table
|
|
(or (window-display-table (selected-window))
|
|
buffer-display-table
|
|
standard-display-table)))
|
|
|
|
(defun make-display-table ()
|
|
(make-vector 261 nil))
|
|
|
|
(defun standard-display-8bit (l h)
|
|
"Display characters in the range [L, H] literally."
|
|
(while (<= l h)
|
|
(if (and (>= l ?\ ) (< l 127))
|
|
(if standard-display-table (aset standard-display-table l nil))
|
|
(or standard-display-table
|
|
(setq standard-display-table (make-vector 261 nil)))
|
|
(aset standard-display-table l l))
|
|
(setq l (1+ l))))
|
|
|
|
(defun standard-display-ascii (c s)
|
|
"Display character C using string S."
|
|
(or standard-display-table
|
|
(setq standard-display-table (make-vector 261 nil)))
|
|
(aset standard-display-table c (apply 'make-rope (append s nil))))
|
|
|
|
(defun standard-display-g1 (c sc)
|
|
"Display character C as character SC in the g1 character set."
|
|
(or standard-display-table
|
|
(setq standard-display-table (make-vector 261 nil)))
|
|
(aset standard-display-table c
|
|
(make-rope (create-glyf (concat "\016" (char-to-string sc) "\017")))))
|
|
|
|
(defun standard-display-graphic (c gc)
|
|
"Display character C as character GC in graphics character set."
|
|
(or standard-display-table
|
|
(setq standard-display-table (make-vector 261 nil)))
|
|
(aset standard-display-table c
|
|
(make-rope (create-glyf (concat "\e(0" (char-to-string gc) "\e(B")))))
|
|
|
|
(defun standard-display-underline (c uc)
|
|
"Display character C as character UC plus underlining."
|
|
(or standard-display-table
|
|
(setq standard-display-table (make-vector 261 nil)))
|
|
(aset standard-display-table c
|
|
(make-rope (create-glyf (concat "\e[4m" (char-to-string uc) "\e[m")))))
|
|
|
|
(defun create-glyf (string)
|
|
(let ((i 256))
|
|
(while (and (< i 65536) (aref glyf-table i)
|
|
(not (string= (aref glyf-table i) string)))
|
|
(setq i (1+ i)))
|
|
(if (= i 65536)
|
|
(error "No free glyf codes remain"))
|
|
(aset glyf-table i string)))
|
|
|
|
(provide 'disp-table)
|