mirror of
https://git.notmuchmail.org/git/notmuch
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93 lines
3.4 KiB
EmacsLisp
93 lines
3.4 KiB
EmacsLisp
;; Compatibility functions for earlier versions of emacs
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;; The functions in this file are copied from more modern versions of
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;; emacs and are Copyright (C) 1985-1986, 1992, 1994-1995, 1999-2017
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;; Free Software Foundation, Inc.
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; emacs master has a bugfix for folding long headers when sending
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;; messages. Include the fix for earlier versions of emacs. To avoid
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;; interfering with gnus we only run the hook when called from
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;; notmuch-message-mode.
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(declare-function mail-header-fold-field "mail-parse" nil)
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(defun notmuch-message--fold-long-headers ()
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(when (eq major-mode 'notmuch-message-mode)
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(goto-char (point-min))
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(while (not (eobp))
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(when (and (looking-at "[^:]+:")
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(> (- (line-end-position) (point)) 998))
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(mail-header-fold-field))
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(forward-line 1))))
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(unless (fboundp 'message--fold-long-headers)
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(add-hook 'message-header-hook 'notmuch-message--fold-long-headers))
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(if (fboundp 'setq-local)
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(defalias 'notmuch-setq-local 'setq-local)
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(defmacro notmuch-setq-local (var val)
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"Set variable VAR to value VAL in current buffer.
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Backport of setq-local for emacs without setq-local (pre 24.3)."
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`(set (make-local-variable ',var) ,val)))
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(if (fboundp 'read-char-choice)
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(defalias 'notmuch-read-char-choice 'read-char-choice)
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(defun notmuch-read-char-choice (prompt chars &optional inhibit-keyboard-quit)
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"Read and return one of CHARS, prompting for PROMPT.
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Any input that is not one of CHARS is ignored.
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If optional argument INHIBIT-KEYBOARD-QUIT is non-nil, ignore
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keyboard-quit events while waiting for a valid input.
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This is an exact copy of this function from emacs 24 for use on
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emacs 23, except with the one emacs 24 only function it calls
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inlined."
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(unless (consp chars)
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(error "Called `read-char-choice' without valid char choices"))
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(let (char done show-help (helpbuf " *Char Help*"))
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(let ((cursor-in-echo-area t)
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(executing-kbd-macro executing-kbd-macro)
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(esc-flag nil))
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(save-window-excursion ; in case we call help-form-show
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(while (not done)
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(unless (get-text-property 0 'face prompt)
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(setq prompt (propertize prompt 'face 'minibuffer-prompt)))
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(setq char (let ((inhibit-quit inhibit-keyboard-quit))
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(read-key prompt)))
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(and show-help (buffer-live-p (get-buffer helpbuf))
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(kill-buffer helpbuf))
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(cond
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((not (numberp char)))
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;; If caller has set help-form, that's enough.
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;; They don't explicitly have to add help-char to chars.
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((and help-form
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(eq char help-char)
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(setq show-help t)
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;; This is an inlined copy of help-form-show as that
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;; was introduced in emacs 24 too.
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(let ((msg (eval help-form)))
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(if (stringp msg)
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(with-output-to-temp-buffer " *Char Help*"
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(princ msg))))))
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((memq char chars)
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(setq done t))
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((and executing-kbd-macro (= char -1))
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;; read-event returns -1 if we are in a kbd macro and
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;; there are no more events in the macro. Attempt to
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;; get an event interactively.
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(setq executing-kbd-macro nil))
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((not inhibit-keyboard-quit)
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(cond
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((and (null esc-flag) (eq char ?\e))
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(setq esc-flag t))
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((memq char '(?\C-g ?\e))
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(keyboard-quit))))))))
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;; Display the question with the answer. But without cursor-in-echo-area.
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(message "%s%s" prompt (char-to-string char))
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char)))
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;; End of compatibility functions
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(provide 'notmuch-compat)
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