diff options
Diffstat (limited to 'lisp/international/mule-cmds.el')
| -rw-r--r-- | lisp/international/mule-cmds.el | 96 |
1 files changed, 51 insertions, 45 deletions
diff --git a/lisp/international/mule-cmds.el b/lisp/international/mule-cmds.el index c86b1da0ae7..5436aaa4fa0 100644 --- a/lisp/international/mule-cmds.el +++ b/lisp/international/mule-cmds.el @@ -283,8 +283,42 @@ wrong, use this command again to toggle back to the right mode." (interactive) (view-file (expand-file-name "HELLO" data-directory))) +(defvar mule-cmds--prefixed-command-next-coding-system nil) +(defvar mule-cmds--prefixed-command-last-coding-system nil) + +(defun mule-cmds--prefixed-command-pch () + (if (not mule-cmds--prefixed-command-next-coding-system) + (progn + (remove-hook 'pre-command-hook #'mule-cmds--prefixed-command-pch) + (remove-hook 'prefix-command-echo-keystrokes-functions + #'mule-cmds--prefixed-command-echo) + (remove-hook 'prefix-command-preserve-state-hook + #'mule-cmds--prefixed-command-preserve)) + (setq this-command + (let ((cmd this-command) + (coding-system mule-cmds--prefixed-command-next-coding-system)) + (lambda () + (interactive) + (setq this-command cmd) + (let ((coding-system-for-read coding-system) + (coding-system-for-write coding-system) + (coding-system-require-warning t)) + (call-interactively cmd))))) + (setq mule-cmds--prefixed-command-last-coding-system + mule-cmds--prefixed-command-next-coding-system) + (setq mule-cmds--prefixed-command-next-coding-system nil))) + +(defun mule-cmds--prefixed-command-echo () + (when mule-cmds--prefixed-command-next-coding-system + (format "With coding-system %S" + mule-cmds--prefixed-command-next-coding-system))) + +(defun mule-cmds--prefixed-command-preserve () + (setq mule-cmds--prefixed-command-next-coding-system + mule-cmds--prefixed-command-last-coding-system)) + (defun universal-coding-system-argument (coding-system) - "Execute an I/O command using the specified coding system." + "Execute an I/O command using the specified CODING-SYSTEM." (interactive (let ((default (and buffer-file-coding-system (not (eq (coding-system-type buffer-file-coding-system) @@ -295,41 +329,13 @@ wrong, use this command again to toggle back to the right mode." (format "Coding system for following command (default %s): " default) "Coding system for following command: ") default)))) - ;; FIXME: This "read-key-sequence + call-interactively" loop is trying to - ;; reproduce the normal command loop, but this "can't" be done faithfully so - ;; it necessarily suffers from breakage in corner cases (e.g. it fails to run - ;; pre/post-command-hook, doesn't properly set this-command/last-command, it - ;; doesn't handle keyboard macros, ...). - (let* ((keyseq (read-key-sequence - (format "Command to execute with %s:" coding-system))) - (cmd (key-binding keyseq))) - ;; read-key-sequence ignores quit, so make an explicit check. - (if (equal last-input-event (nth 3 (current-input-mode))) - (keyboard-quit)) - (when (memq cmd '(universal-argument digit-argument)) - (call-interactively cmd) - - ;; Process keys bound in `universal-argument-map'. - (while (progn - (setq keyseq (read-key-sequence nil t) - cmd (key-binding keyseq t)) - (memq cmd '(negative-argument digit-argument - universal-argument-more))) - (setq current-prefix-arg prefix-arg prefix-arg nil) - ;; Have to bind `last-command-event' here so that - ;; `digit-argument', for instance, can compute the - ;; `prefix-arg'. - (setq last-command-event (aref keyseq 0)) - (call-interactively cmd))) - - (let ((coding-system-for-read coding-system) - (coding-system-for-write coding-system) - (coding-system-require-warning t)) - (setq current-prefix-arg prefix-arg prefix-arg nil) - ;; Have to bind `last-command-event' e.g. for `self-insert-command'. - (setq last-command-event (aref keyseq 0)) - (message "") - (call-interactively cmd)))) + (prefix-command-preserve-state) + (setq mule-cmds--prefixed-command-next-coding-system coding-system) + (add-hook 'pre-command-hook #'mule-cmds--prefixed-command-pch) + (add-hook 'prefix-command-echo-keystrokes-functions + #'mule-cmds--prefixed-command-echo) + (add-hook 'prefix-command-preserve-state-hook + #'mule-cmds--prefixed-command-preserve)) (defun set-default-coding-systems (coding-system) "Set default value of various coding systems to CODING-SYSTEM. @@ -700,8 +706,8 @@ DEFAULT is the coding system to use by default in the query." ;; buffer is displayed. (when (and unsafe (not (stringp from))) (pop-to-buffer bufname) - (goto-char (apply 'min (mapcar #'(lambda (x) (car (cadr x))) - unsafe)))) + (goto-char (apply #'min (mapcar (lambda (x) (or (car (cadr x)) (point-max))) + unsafe)))) ;; Then ask users to select one from CODINGS while showing ;; the reason why none of the defaults are not used. (with-output-to-temp-buffer "*Warning*" @@ -1402,13 +1408,13 @@ The commands `describe-input-method' and `list-input-methods' need these duplicated values to show some information about input methods without loading the relevant Quail packages. \n(fn INPUT-METHOD LANG-ENV ACTIVATE-FUNC TITLE DESCRIPTION &rest ARGS)" - (if (symbolp lang-env) - (setq lang-env (symbol-name lang-env)) - (setq lang-env (purecopy lang-env))) - (if (symbolp input-method) - (setq input-method (symbol-name input-method)) - (setq input-method (purecopy input-method))) - (setq args (mapcar 'purecopy args)) + (setq lang-env (if (symbolp lang-env) + (symbol-name lang-env) + (purecopy lang-env))) + (setq input-method (if (symbolp input-method) + (symbol-name input-method) + (purecopy input-method))) + (setq args (mapcar #'purecopy args)) (let ((info (cons lang-env args)) (slot (assoc input-method input-method-alist))) (if slot |