This is a suggested extension for muse-color. It's just makes the
syntax highlighting for emphasis customizable and changes the default
colouration.
The reason for this is that I thought the highlighting wasn't working
but this turns out to be because the font I was using doesn't
have an italic characters, so *emph* looks normal.
I've stolen these colours from gnus citation faces which
uses colours to highlight citation levels. Of course
they could be changed bback to italic, bold and bold-italic to retain
the current UI.
These changes are on top of 3.02 release.
(defun muse-colors-emphasized ()
;; Here we need to check four different points - the start and end
;; of the leading *s, and the start and end of the trailing *s. We
;; allow the outsides to be surrounded by whitespace or punctuation,
;; but no word characters, and the insides must not be surrounded by
;; whitespace or punctuation. Thus the following are valid:
;;
;; " *foo bar* "
;; "**foo**,"
;; and the following is invalid:
;; "** testing **"
(let* ((beg (match-beginning 0))
(e1 (match-end 0))
(leader (- e1 beg))
b2 e2 multiline)
(unless (eq (get-text-property beg 'invisible) 'muse)
;; check if it's a header
(if (eq (char-after e1) ?\ )
(when (or (= beg (point-min))
(eq (char-before beg) ?\n))
(add-text-properties
(muse-line-beginning-position) (muse-line-end-position)
(list 'face (intern (concat "muse-header-"
(int-to-string leader))))))
;; beginning of line or space or symbol
(when (or (= beg (point-min))
(eq (char-syntax (char-before beg)) ?\ )
(memq (char-before beg)
'(?\- ?\[ ?\< ?\( ?\' ?\` ?\" ?\n)))
(save-excursion
(skip-chars-forward "^*<>\n" end)
(when (eq (char-after) ?\n)
(setq multiline t)
(skip-chars-forward "^*<>" end))
(setq b2 (point))
(skip-chars-forward "*" end)
(setq e2 (point))
;; Abort if space exists just before end
;; or bad leader
;; or no '*' at end
;; or word constituent follows
(unless (or (> leader 5)
(not (eq leader (- e2 b2)))
(eq (char-syntax (char-before b2)) ?\ )
(not (eq (char-after b2) ?*))
(and (not (eobp))
(eq (char-syntax (char-after (1+ b2)))
?w)))
(add-text-properties beg e1 '(invisible muse))
(add-text-properties
e1 b2 (list 'face (cond ((= leader 1) '(face
muse-emphasis-1))
((= leader 2) '(face
muse-emphasis-2))
((= leader 3) '(face
muse-emphasis-3)))))
(add-text-properties b2 e2 '(invisible muse))
(when multiline
(add-text-properties
beg e2 '(font-lock-multiline t))))))))))
(defface muse-emphasis-1 '((((class color)
(background dark))
(:foreground "light blue"))
(((class color)
(background light))
(:foreground "MidnightBlue"))
(t
(:italic t)))
"Emphasis 1 (Strong)")
(defface muse-emphasis-2 '((((class color)
(background dark))
(:foreground "light cyan"))
(((class color)
(background light))
(:foreground "firebrick"))
(t
(:italic t)))
"Emphasis 2 (Stronger)")
(defface muse-emphasis-3 '((((class color)
(background dark))
(:foreground "light yellow"))
(((class color)
(background light))
(:foreground "dark green"))
(t
(:italic t)))
"Emphasis 3 (Strongest)")
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