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* lisp/progmodes/ruby-mode.el: Handle general delimited literals.

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(ruby-syntax-general-delimiters-goto-beg)
(ruby-syntax-propertize-general-delimiters): New functions.
(ruby-syntax-propertize-function): Use them to handle GDL.
(ruby-font-lock-keywords): Move old handling of GDL...
(ruby-font-lock-syntactic-keywords): .. to here.
(ruby-calculate-indent): Adjust indentation for GDL.

Fixes: debbugs:6286
This commit is contained in:
Dmitry Gutov 2012-04-24 11:51:14 -04:00 • committed by Stefan Monnier
parent 257440aa1c
commit 85222d4485
2 changed files with 56 additions and 6 deletions
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10
lisp/ChangeLog
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@ -1,3 +1,13 @@
2012-04-24 Dmitry Gutov <dgutov@yandex.ru>
* progmodes/ruby-mode.el: Handle general delimited literals (bug#6286).
(ruby-syntax-general-delimiters-goto-beg)
(ruby-syntax-propertize-general-delimiters): New functions.
(ruby-syntax-propertize-function): Use them to handle GDL.
(ruby-font-lock-keywords): Move old handling of GDL...
(ruby-font-lock-syntactic-keywords): .. to here.
(ruby-calculate-indent): Adjust indentation for GDL.
2012-04-24 Leo Liu <sdl.web@gmail.com>
* progmodes/python.el: Move hideshow setup to the end.

52
lisp/progmodes/ruby-mode.el
View file

@ -794,8 +794,8 @@ and `\\' when preceded by `?'."
;; (not (or (eolp) (looking-at "#")
;; (and (eq (car (nth 1 state)) ?{)
;; (looking-at "|"))))))
(or (not (eq ?/ c))
(null (nth 0 (ruby-parse-region (or begin parse-start) (point)))))
;; not a regexp or general delimited literal
(null (nth 0 (ruby-parse-region (or begin parse-start) (point))))
(or (not (eq ?| (char-after (point))))
(save-excursion
(or (eolp) (forward-char -1))
@ -1118,6 +1118,7 @@ See `add-log-current-defun-function'."
"Syntactic keywords for Ruby mode. See `syntax-propertize-function'."
(goto-char start)
(ruby-syntax-propertize-heredoc end)
(ruby-syntax-general-delimiters-goto-beg)
(funcall
(syntax-propertize-rules
;; #{ }, #$hoge, #@foo are not comments
@ -1137,7 +1138,10 @@ See `add-log-current-defun-function'."
("^\\(=\\)begin\\_>" (1 "!"))
;; Handle here documents.
((concat ruby-here-doc-beg-re ".*\\(\n\\)")
(7 (prog1 "\"" (ruby-syntax-propertize-heredoc end)))))
(7 (prog1 "\"" (ruby-syntax-propertize-heredoc end))))
;; Handle percent literals: %w(), %q{}, etc.
("\\(?:^\\|[[ \t\n<+(,=]\\)\\(%\\)[qQrswWx]?\\([[:punct:]]\\)"
(1 (prog1 "|" (ruby-syntax-propertize-general-delimiters end)))))
(point) end))
(defun ruby-syntax-propertize-heredoc (limit)
@ -1163,6 +1167,41 @@ See `add-log-current-defun-function'."
;; Make extra sure we don't move back, lest we could fall into an
;; inf-loop.
(if (< (point) start) (goto-char start))))))
(defun ruby-syntax-general-delimiters-goto-beg ()
(let ((state (syntax-ppss)))
;; Move to the start of the literal, in case it's multiline.
;; TODO: determine the literal type more reliably here?
(when (eq t (nth 3 state))
(goto-char (nth 8 state))
(beginning-of-line))))
(defun ruby-syntax-propertize-general-delimiters (limit)
(goto-char (match-beginning 2))
(let* ((op (char-after))
(ops (char-to-string op))
(cl (or (cdr (aref (syntax-table) op))
(cdr (assoc op '((?< . ?>))))))
parse-sexp-lookup-properties)
(ignore-errors
(if cl
(progn ; paired delimiters
;; Delimiter pairs of the same kind can be nested
;; inside the literal, as long as they are balanced.
;; Create syntax table that ignores other characters.
(with-syntax-table (make-char-table 'syntax-table nil)
(modify-syntax-entry op (concat "(" (char-to-string cl)))
(modify-syntax-entry cl (concat ")" ops))
(modify-syntax-entry ?\\ "\\")
(save-restriction
(narrow-to-region (point) limit)
(forward-list)))) ; skip to the paired character
;; single character delimiter
(re-search-forward (concat "[^\\]\\(?:\\\\\\\\\\)*"
(regexp-quote ops)) limit nil))
;; if we reached here, the closing delimiter was found
(put-text-property (1- (point)) (point)
'syntax-table (string-to-syntax "|")))))
)
;; For Emacsen where syntax-propertize-rules is not (yet) available,
@ -1207,6 +1246,10 @@ This should only be called after matching against `ruby-here-doc-end-re'."
(4 (7 . ?/))
(6 (7 . ?/)))
("^=en\\(d\\)\\_>" 1 "!")
;; general delimited string
("\\(^\\|[[ \t\n<+(,=]\\)\\(%[xrqQwW]?\\([^<[{(a-zA-Z0-9 \n]\\)[^\n\\\\]*\\(\\\\.[^\n\\\\]*\\)*\\(\\3\\)\\)"
(3 "\"")
(5 "\""))
("^\\(=\\)begin\\_>" 1 (ruby-comment-beg-syntax))
;; Currently, the following case is highlighted incorrectly:
;;
@ -1415,9 +1458,6 @@ See `font-lock-syntax-table'.")
1 font-lock-variable-name-face)
'("\\(\\$\\|@\\|@@\\)\\(\\w\\|_\\)+"
0 font-lock-variable-name-face)
;; general delimited string
'("\\(^\\|[[ \t\n<+(,=]\\)\\(%[xrqQwW]?\\([^<[{(a-zA-Z0-9 \n]\\)[^\n\\\\]*\\(\\\\.[^\n\\\\]*\\)*\\(\\3\\)\\)"
(2 font-lock-string-face))
;; constants
'("\\(^\\|[^_]\\)\\b\\([A-Z]+\\(\\w\\|_\\)*\\)"
2 font-lock-type-face)