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Fix fontification of LaTeX environments 

* lisp/org.el (org-compute-latex-and-related-regexp):
(org-do-latex-and-related): Fix fontification of LaTeX environments.
This commit is contained in:
Nicolas Goaziou 2018-12-13 21:28:14 +01:00
parent a60a0edc6f
commit a86b14253b
1 changed files with 58 additions and 32 deletions
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90
lisp/org.el
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@ -6226,24 +6226,31 @@ Also refresh fontification if needed."
(defun org-compute-latex-and-related-regexp ()
"Compute regular expression for LaTeX, entities and sub/superscript.
Result depends on variable `org-highlight-latex-and-related'."
(setq-local
org-latex-and-related-regexp
(let* ((re-sub
(cond ((not (memq 'script org-highlight-latex-and-related)) nil)
((eq org-use-sub-superscripts '{})
(list org-match-substring-with-braces-regexp))
(org-use-sub-superscripts (list org-match-substring-regexp))))
(re-latex
(when (memq 'latex org-highlight-latex-and-related)
(let ((matchers (plist-get org-format-latex-options :matchers)))
(delq nil
(mapcar (lambda (x)
(and (member (car x) matchers) (nth 1 x)))
org-latex-regexps)))))
(re-entities
(when (memq 'entities org-highlight-latex-and-related)
(list "\\\\\\(there4\\|sup[123]\\|frac[13][24]\\|[a-zA-Z]+\\)\\($\\|{}\\|[^[:alpha:]]\\)"))))
(mapconcat 'identity (append re-latex re-entities re-sub) "\\|"))))
(let ((re-sub
(cond ((not (memq 'script org-highlight-latex-and-related)) nil)
((eq org-use-sub-superscripts '{})
(list org-match-substring-with-braces-regexp))
(org-use-sub-superscripts (list org-match-substring-regexp))))
(re-latex
(when (memq 'latex org-highlight-latex-and-related)
(let* ((matchers (plist-get org-format-latex-options :matchers))
(regexps (and (member "begin" matchers)
'("\\\\end{[a-zA-Z0-9\\*]+}[ \t]*$"))))
(dolist (matcher matchers)
(pcase (assoc matcher org-latex-regexps)
(`("begin" . ,_) (push "^[ \t]*\\\\begin{[a-zA-Z0-9\\*]+}"
regexps))
(`(,_ ,regexp . ,_) (push regexp regexps))
(_ nil)))
(nreverse regexps))))
(re-entities
(when (memq 'entities org-highlight-latex-and-related)
(list "\\\\\\(there4\\|sup[123]\\|frac[13][24]\\|[a-zA-Z]+\\)\
\\($\\|{}\\|[^[:alpha:]]\\)"))))
(setq-local org-latex-and-related-regexp
(mapconcat #'identity
(append re-latex re-entities re-sub)
"\\|"))))
(defun org-do-latex-and-related (limit)
"Highlight LaTeX snippets and environments, entities and sub/superscript.
@ -6253,22 +6260,41 @@ done, nil otherwise."
(when (org-string-nw-p org-latex-and-related-regexp)
(catch 'found
(while (re-search-forward org-latex-and-related-regexp limit t)
(unless
(cl-some
(lambda (f)
(memq f '(org-code org-verbatim underline org-special-keyword)))
(save-excursion
(goto-char (1+ (match-beginning 0)))
(face-at-point nil t)))
(let ((offset (if (memq (char-after (1+ (match-beginning 0)))
(unless (cl-some
(lambda (f) (memq f '(org-code org-verbatim underline
org-special-keyword)))
(save-excursion
(goto-char (1+ (match-beginning 0)))
(face-at-point nil t)))
(let* ((start (if (memq (char-after (1+ (match-beginning 0)))
'(?_ ?^))
1
0)))
(1+ (match-beginning 0))
(match-beginning 0)))
(end
(let* ((b (match-beginning 0))
(e (match-end 0))
(m (buffer-substring-no-properties b e)))
(cond
((string-match "\\`[ \t]*\\\\begin{\\([a-zA-Z0-9\\*]+\\)}"
m)
(let ((closing
(format "\\\\end{%s}[ \t]*$"
(regexp-quote (match-string 1 m)))))
(or (re-search-forward closing nil t) e)))
((string-match "\\\\end{\\([a-zA-Z0-9\\*]+\\)}[ \t]*\\'" m)
(let ((opening
(format "^[ \t]*\\\\begin{%s}"
(regexp-quote (match-string 1 m)))))
(setq start (or (save-excursion
(re-search-backward opening nil t))
b))
(line-end-position)))
((string-match "\\\\[a-zA-Z]+\\*?{" m)
(search-forward "}" nil t))
(t e)))))
(font-lock-prepend-text-property
(+ offset (match-beginning 0)) (match-end 0)
'face 'org-latex-and-related)
(add-text-properties (+ offset (match-beginning 0)) (match-end 0)
'(font-lock-multiline t)))
start end 'face 'org-latex-and-related)
(add-text-properties start end '(font-lock-multiline t)))
(throw 'found t)))
nil)))