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Diffstat (limited to 'leim/quail/uni-input.el')
| -rw-r--r-- | leim/quail/uni-input.el | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/leim/quail/uni-input.el b/leim/quail/uni-input.el new file mode 100644 index 00000000000..d802fcf7e06 --- /dev/null +++ b/leim/quail/uni-input.el @@ -0,0 +1,161 @@ +;;; uni-input.el --- Hex Unicode input method + +;; Copyright (C) 2001 Free Software Foundation, Inc. + +;; Author: Dave Love <fx@gnu.org> +;; Keywords: i18n + +;; This file 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 file 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. + +;;; Commentary: + +;; Provides an input method for entering characters by hex unicode in +;; the form `uxxxx', similarly to the Yudit editor. + +;; This is not really a Quail method, but uses some Quail functions. +;; There is probably A Better Way. + +;; Compare `ucs-insert', which explicitly inserts a unicoded character +;; rather than supplying an input method. + +;;; Code: + +(require 'quail) + +;; Maybe stolen from Mule-UCS -- I don't remember. +(define-ccl-program utf-8-ccl-encode + `(4 (if (r0 < ?\x80) + ((write r0)) + (if (r0 < #x800) + ((write ((r0 >> 6) | ?\xC0)) + (write ((r0 & ?\x3F) | ?\x80))) + (if (r0 < #x10000) + ((write ((r0 >> 12) | ?\xE0)) + (write (((r0 >> 6) & ?\x3F) | ?\x80)) + (write ((r0 & ?\x3F) | ?\x80))) + (if (r0 < #x200000) + ((write ((r0 >> 18) | ?\xF0)) + (write (((r0 >> 12) & ?\3F) | ?\x80)) + (write (((r0 >> 6) & ?\x3F) | ?\x80)) + (write ((r0 & ?\x3F) | ?\x80))) + (if (r0 < #x4000000) + ((write ((r0 >> 24) | ?\xF8)) + (write (((r0 >> 18) & ?\x3F) | ?\x80)) + (write (((r0 >> 12) & ?\x3F) | ?\x80)) + (write (((r0 >> 6) & ?\x3F) | ?\x80)) + (write ((r0 & ?\x3f) | ?\x80))) + ((write ((r0 >> 30) | ?\xFC)) + (write (((r0 >> 24) & ?\x3F) | ?\x80)) + (write (((r0 >> 18) & ?\x3F) | ?\x80)) + (write (((r0 >> 12) & ?\x3F) | ?\x80)) + (write (((r0 >> 6) & ?\x3F) | ?\x80)) + (write ((r0 & ?\x3f) | ?\x80)))))))))) + +(defun ucs-input-method (key) + (if (or buffer-read-only + (and (/= key ?U) (/= key ?u))) + (list key) + (quail-setup-overlays nil) + (let ((current-prefix-arg) + (last-command-char key)) + (call-interactively 'self-insert-command)) + (let ((modified-p (buffer-modified-p)) + (buffer-undo-list t) + (input-method-function nil) + (echo-keystrokes 0) + (help-char nil) + (events (list key)) + (str " ")) + (unwind-protect + (catch 'non-digit + (progn + (dotimes (i 4) + (let ((seq (read-key-sequence nil)) + key) + (if (and (stringp seq) + (= 1 (length seq)) + (setq key (aref seq 0)) + (memq key '(?0 ?1 ?2 ?3 ?4 ?5 ?6 ?7 ?8 ?9 ?a + ?b ?c ?d ?e ?f ?A ?B ?C ?D ?E ?F))) + (progn + (push key events) + (let ((last-command-char key) + (current-prefix-arg)) + (call-interactively 'self-insert-command))) + (let ((last-command-char key) + (current-prefix-arg)) + (condition-case nil + (call-interactively (key-binding seq)))) + (quail-delete-region) + (throw 'non-digit (append (reverse events) + (listify-key-sequence seq)))))) + (quail-delete-region) + (let* ((n (string-to-number (apply 'string + (cdr (nreverse events))) + 16)) + (c (decode-char 'ucs n)) + (status (make-vector 9 nil))) + (if c + (list c) + (aset status 0 n) + (string-to-list (ccl-execute-on-string + 'utf-8-ccl-encode status "")))))) + (quail-delete-overlays) + (set-buffer-modified-p modified-p) + (run-hooks 'input-method-after-insert-chunk-hook))))) + +(defun ucs-input-activate (&optional arg) + "Activate UCS input method. +With arg, activate UCS input method if and only if arg is positive. + +While this input method is active, the variable +`input-method-function' is bound to the function `ucs-input-method'." + (if (and arg + (< (prefix-numeric-value arg) 0)) + (unwind-protect + (progn + (quail-hide-guidance-buf) + (quail-delete-overlays) + (setq describe-current-input-method-function nil)) + (kill-local-variable 'input-method-function)) + (setq inactivate-current-input-method-function 'ucs-input-inactivate) + (setq describe-current-input-method-function 'ucs-input-help) + (quail-delete-overlays) + (if (eq (selected-window) (minibuffer-window)) + (add-hook 'minibuffer-exit-hook 'quail-exit-from-minibuffer)) + (add-hook 'kill-buffer-hook 'quail-kill-guidance-buf nil t) + (set (make-local-variable 'input-method-function) + 'ucs-input-method))) + +(defun ucs-input-inactivate () + "Inactivate UCS input method." + (interactive) + (ucs-input-activate -1)) + +(defun ucs-input-help () + (interactive) + (with-output-to-temp-buffer "*Help*" + (princ "\ +Input method: ucs (mode line indicator:U) + +Input as Unicode: U<hex> or u<hex>, where <hex> is a four-digit hex number."))) + +(register-input-method "ucs" "UTF-8" 'ucs-input-activate "U+" + "Unicode input as hex in the form Uxxxx.") + +(provide 'uni-input) + +;;; uni-input.el ends here |