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[Emacs] Highlight multiline attribute hashes.

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This commit is contained in:
Nathan Weizenbaum 2009-03-07 02:53:21 -08:00
parent 920102ecac
commit 1ee16d0f04
1 changed files with 61 additions and 9 deletions
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66
extra/haml-mode.el
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@ -136,12 +136,31 @@ For example, this will highlight all of the following:
(?. font-lock-type-face)))
(goto-char (match-end 0)))
;; Highlight attr hashes and obj refs
(dolist (char '(?\{ ?\[))
(when (eq (char-after) char)
;; Highlight obj refs
(when (eq (char-after) ?\[)
(let ((beg (point)))
(haml-limited-forward-sexp eol)
(haml-fontify-region-as-ruby beg (point)))))
(haml-fontify-region-as-ruby beg (point))))
;; Highlight attr hashes
(when (eq (char-after) ?\{)
(let ((beg (point)))
(haml-limited-forward-sexp eol)
;; Check for multiline
(while (and (eolp) (eq (char-before) ?,))
(forward-line)
(let ((eol (save-excursion (end-of-line) (point))))
;; If no sexps are closed,
;; we're still continuing a multiline hash
(if (>= (car (parse-partial-sexp (point) eol)) 0)
(end-of-line)
;; If sexps have been closed,
;; set the point at the end of the total sexp
(goto-char beg)
(haml-limited-forward-sexp eol))))
(haml-fontify-region-as-ruby beg (point))))
;; Move past end chars
(when (looking-at "[<>&!]+") (goto-char (match-end 0)))
@ -182,7 +201,7 @@ whichever comes first."
(signal 'scan-error (cdr err)))
(goto-char limit)))))
(defun* haml-extend-region ()
(defun* haml-extend-region-filters-comments ()
"Extend the font-lock region to encompass filters and comments."
(let ((old-beg font-lock-beg)
(old-end font-lock-end))
@ -191,7 +210,7 @@ whichever comes first."
(beginning-of-line)
(unless (or (looking-at haml-filter-re)
(looking-at haml-comment-re))
(return-from haml-extend-region))
(return-from haml-extend-region-filters-comments))
(setq font-lock-beg (point))
(haml-forward-sexp)
(beginning-of-line)
@ -199,6 +218,38 @@ whichever comes first."
(or (/= old-beg font-lock-beg)
(/= old-end font-lock-end))))
(defun* haml-extend-region-multiline-hashes ()
"Extend the font-lock region to encompass multiline attribute hashes."
(let ((old-beg font-lock-beg)
(old-end font-lock-end))
(save-excursion
(goto-char font-lock-beg)
(let ((attr-props (haml-parse-multiline-attr-hash))
multiline-end)
(when attr-props
(setq font-lock-beg (cdr (assq 'point attr-props)))
(end-of-line)
;; Move through multiline attrs
(when (eq (char-before) ?,)
(save-excursion
(while (progn (end-of-line) (eq (char-before) ?,))
(forward-line))
(forward-line -1)
(end-of-line)
(setq multiline-end (point))))
(goto-char (+ (cdr (assq 'point attr-props))
(cdr (assq 'hash-indent attr-props))
-1))
(haml-limited-forward-sexp
(or multiline-end
(save-excursion (end-of-line) (point))))
(setq font-lock-end (max font-lock-end (point))))))
(or (/= old-beg font-lock-beg)
(/= old-end font-lock-end))))
;; Mode setup
@ -228,7 +279,8 @@ whichever comes first."
\\{haml-mode-map}"
(set-syntax-table haml-mode-syntax-table)
(add-to-list 'font-lock-extend-region-functions 'haml-extend-region)
(add-to-list 'font-lock-extend-region-functions 'haml-extend-region-filters-comments)
(add-to-list 'font-lock-extend-region-functions 'haml-extend-region-multiline-hashes)
(set (make-local-variable 'font-lock-multiline) t)
(set (make-local-variable 'indent-line-function) 'haml-indent-line)
(set (make-local-variable 'indent-region-function) 'haml-indent-region)