The variable mh-mime-content-types contains a list of the
currently valid content types. They are listed in the table in
section Editing a Draft. If you encounter a new content type,
you can add it like this:
(setq mh-mime-content-types (append mh-mime-content-types
'(("new/type"))))
Emacs macros can be used to insert enriched text directives like `<bold>'. The following code will make, for example, C-c t b insert the `<bold>' directive.
Emacs macros for entering enriched text
(defvar enriched-text-types '(("b" . "bold") ("i" . "italic") ("f" . "fixed")
("s" . "smaller") ("B" . "bigger")
("u" . "underline") ("c" . "center"))
"Alist of (final-character . directive) choices for add-enriched-text.
Additional types can be found in RFC 1563.")
(defun add-enriched-text (begin end)
"Add enriched text directives around region.
The directive used comes from the list enriched-text-types and is
specified by the last keystroke of the command. When called from Lisp,
arguments are BEGIN and END."
(interactive "r")
;; Set type to the directive indicated by the last keystroke.
(let ((type (cdr (assoc (char-to-string (logior last-input-char ?`))
enriched-text-types))))
(save-restriction ; restores state from narrow-to-region
(narrow-to-region begin end) ; narrow view to region
(goto-char (point-min)) ; move to beginning of text
(insert "<" type ">") ; insert beginning directive
(goto-char (point-max)) ; move to end of text
(insert "</" type ">")))) ; insert terminating directive
To use the function add-enriched-text, first create keybindings
for it (see section Sending Mail). Then, set the mark with
C-@ or C-SPC, type in the text to be highlighted, and type
C-c t b. This adds `<bold>' where you set the mark and
adds `</bold>' at the location of your cursor, giving you something
like: `You should be <bold>very</bold>'. You may also be
interested in investigating sgml-mode.
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