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Commit e636fafe authored by Dmitry Gutov's avatar Dmitry Gutov Committed by Stefan Monnier
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* lisp/progmodes/ruby-mode.el: Improve percent literals. 

(ruby-percent-literal-beg-re): New constant.
(ruby-syntax-general-delimiters-goto-beg): Rename to
`ruby-syntax-enclosing-percent-literal', improve literal type check.
(ruby-syntax-propertize-general-delimiters): Rename to
`ruby-syntax-propertize-percent-literal', it's a shorter and more
popular term.  Adjust comments everywhere.
(ruby-syntax-propertize-percent-literal): Only propertize when not
inside a simple string or comment.  When the literal is unclosed,
leave the text after it unpropertized.

Fixes: debbugs:6286
parent 8e99d072
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Showing with 63 additions and 39 deletions
lisp/ChangeLog
View file @ e636fafe
2012-08-14 Dmitry Gutov <dgutov@yandex.ru>
* progmodes/ruby-mode.el: Improve percent literals (bug#6286).
(ruby-percent-literal-beg-re): New constant.
(ruby-syntax-general-delimiters-goto-beg): Rename to
`ruby-syntax-enclosing-percent-literal', improve literal type check.
(ruby-syntax-propertize-general-delimiters): Rename to
`ruby-syntax-propertize-percent-literal', it's a shorter and more
popular term. Adjust comments everywhere.
(ruby-syntax-propertize-percent-literal): Only propertize when not
inside a simple string or comment. When the literal is unclosed,
leave the text after it unpropertized.
2012-08-14 Andreas Schwab <schwab@linux-m68k.org>
* emacs-lisp/bytecomp.el (byte-recompile-file): When LOAD is
......@@ -22,8 +35,8 @@
Use `completion-table-dynamic' for completion functions.
* progmodes/python.el
(python-shell-completion--do-completion-at-point)
(python-shell-completion--get-completions): Remove
functions.
(python-shell-completion--get-completions):
Remove functions.
(python-shell-completion-complete-at-point): New function.
(python-completion-complete-at-point): Use it.
......
lisp/progmodes/ruby-mode.el
View file @ e636fafe
......@@ -800,7 +800,7 @@ and `\\' when preceded by `?'."
;; (not (or (eolp) (looking-at "#")
;; (and (eq (car (nth 1 state)) ?{)
;; (looking-at "|"))))))
;; Not a regexp or general delimited literal.
;; Not a regexp or percent literal.
(null (nth 0 (ruby-parse-region (or begin parse-start)
(point))))
(or (not (eq ?| (char-after (point))))
......@@ -1169,17 +1169,22 @@ See `add-log-current-defun-function'."
(ruby-do-end-to-brace)))
(declare-function ruby-syntax-propertize-heredoc "ruby-mode" (limit))
(declare-function ruby-syntax-general-delimiters-goto-beg "ruby-mode" ())
(declare-function ruby-syntax-propertize-general-delimiters "ruby-mode" (limit))
(declare-function ruby-syntax-enclosing-percent-literal "ruby-mode" (limit))
(declare-function ruby-syntax-propertize-percent-literal "ruby-mode" (limit))
(if (eval-when-compile (fboundp #'syntax-propertize-rules))
;; New code that works independently from font-lock.
(progn
(eval-and-compile
(defconst ruby-percent-literal-beg-re
"\\(%\\)[qQrswWx]?\\([[:punct:]]\\)"
"Regexp to match the beginning of percent literal."))
(defun ruby-syntax-propertize-function (start end)
"Syntactic keywords for Ruby mode. See `syntax-propertize-function'."
(goto-char start)
(ruby-syntax-propertize-heredoc end)
(ruby-syntax-general-delimiters-goto-beg)
(ruby-syntax-enclosing-percent-literal end)
(funcall
(syntax-propertize-rules
;; #{ }, #$hoge, #@foo are not comments.
......@@ -1222,8 +1227,8 @@ See `add-log-current-defun-function'."
'syntax-table (string-to-syntax "\""))
(ruby-syntax-propertize-heredoc end))))
;; Handle percent literals: %w(), %q{}, etc.
("\\(?:^\\|[[ \t\n<+(,=]\\)\\(%\\)[qQrswWx]?\\([[:punct:]]\\)"
(1 (prog1 "|" (ruby-syntax-propertize-general-delimiters end)))))
((concat "\\(?:^\\|[[ \t\n<+(,=]\\)" ruby-percent-literal-beg-re)
(1 (prog1 "|" (ruby-syntax-propertize-percent-literal end)))))
(point) end))
(defun ruby-syntax-propertize-heredoc (limit)
......@@ -1251,40 +1256,46 @@ See `add-log-current-defun-function'."
;; 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?
(defun ruby-syntax-enclosing-percent-literal (limit)
(let ((state (syntax-ppss))
(start (point)))
;; When already inside percent literal, re-propertize it.
(when (eq t (nth 3 state))
(goto-char (nth 8 state))
(beginning-of-line))))
(when (looking-at ruby-percent-literal-beg-re)
(ruby-syntax-propertize-percent-literal limit))
(when (< (point) start) (goto-char start)))))
(defun ruby-syntax-propertize-general-delimiters (limit)
(defun ruby-syntax-propertize-percent-literal (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 "|")))))
;; Not inside a simple string or comment.
(when (eq t (nth 3 (syntax-ppss)))
(let* ((op (char-after))
(ops (char-to-string op))
(cl (or (cdr (aref (syntax-table) op))
(cdr (assoc op '((?< . ?>))))))
parse-sexp-lookup-properties)
(condition-case nil
(progn
(if cl ; 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))
;; Found the closing delimiter.
(put-text-property (1- (point)) (point) 'syntax-table
(string-to-syntax "|")))
;; Unclosed literal, leave the following text unpropertized.
((scan-error search-failed) (goto-char limit))))))
)
;; For Emacsen where syntax-propertize-rules is not (yet) available,
......@@ -1329,7 +1340,7 @@ This should only be called after matching against `ruby-here-doc-end-re'."
(4 (7 . ?/))
(6 (7 . ?/)))
("^=en\\(d\\)\\_>" 1 "!")
;; General delimited string.
;; Percent literal.
("\\(^\\|[[ \t\n<+(,=]\\)\\(%[xrqQwW]?\\([^<[{(a-zA-Z0-9 \n]\\)[^\n\\\\]*\\(\\\\.[^\n\\\\]*\\)*\\(\\3\\)\\)"
(3 "\"")
(5 "\""))
......
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