Commit 7dab3ee7 authored by Noam Postavsky's avatar Noam Postavsky

Recognize single quote attribute values in nxml and sgml (Bug#35381)

* lisp/textmodes/sgml-mode.el (sgml-specials): Add single quote.
(sgml-syntax-propertize-rules): Handle single quote.
* test/lisp/nxml/nxml-mode-tests.el (nxml-mode-font-lock-quotes): New
* test/lisp/textmodes/sgml-mode-tests.el
(sgml-delete-tag-bug-8203-should-not-delete-apostrophe): Now passes.
parent e4cde426
......@@ -100,24 +100,20 @@ a DOCTYPE or an XML declaration."
:group 'sgml
:type 'hook)
;; As long as Emacs's syntax can't be complemented with predicates to context
;; sensitively confirm the syntax of characters, we have to live with this
;; kludgy kind of tradeoff.
(defvar sgml-specials '(?\")
;; The official handling of "--" is complicated in SGML, and
;; historically not well supported by browser HTML parsers.
;; Recommendations for writing HTML comments is to use <!--...-->
;; (where ... doesn't contain "--") to avoid the complications
;; altogether (XML goes even further by requiring this in the spec).
;; So there is probably no need to handle it "correctly".
(defvar sgml-specials '(?\" ?\')
"List of characters that have a special meaning for SGML mode.
This list is used when first loading the `sgml-mode' library.
The supported characters and potential disadvantages are:
The supported characters are ?\\\", ?\\=', and ?-.
?\\\" Makes \" in text start a string.
?\\=' Makes \\=' in text start a string.
?- Makes -- in text start a comment.
When only one of ?\\\" or ?\\=' are included, \"\\='\" or \\='\"\\=', as can be found in
DTDs, start a string. To partially avoid this problem this also makes these
self insert as named entities depending on `sgml-quick-keys'.
Including ?- has the problem of affecting dashes that have nothing to do
with comments, so we normally turn it off.")
Including ?- makes double dashes into comment delimiters, but
they are really only supposed to delimit comments within DTD
definitions. So we normally turn it off.")
(defvar sgml-quick-keys nil
"Use <, >, &, /, SPC and `sgml-specials' keys \"electrically\" when non-nil.
......@@ -351,10 +347,10 @@ Any terminating `>' or `/' is not matched.")
("--[ \t\n]*\\(>\\)" (1 "> b"))
("\\(<\\)[?!]" (1 (prog1 "|>"
(sgml-syntax-propertize-inside end))))
;; Double quotes outside of tags should not introduce strings.
;; Quotes outside of tags should not introduce strings.
;; Be careful to call `syntax-ppss' on a position before the one we're
;; going to change, so as not to need to flush the data we just computed.
("\"" (0 (if (prog1 (zerop (car (syntax-ppss (match-beginning 0))))
("[\"']" (0 (if (prog1 (zerop (car (syntax-ppss (match-beginning 0))))
(goto-char (match-end 0)))
(string-to-syntax ".")))))))
......@@ -58,5 +58,25 @@
(should (equal (buffer-string) "<a><b c=\"\"></b></a>"))))
(ert-deftest nxml-mode-font-lock-quotes ()
(insert "<x a=\"dquote attr\" b='squote attr'>\"dquote text\"'squote text'</x>")
(let ((squote-txt-pos (search-backward "squote text"))
(dquote-txt-pos (search-backward "dquote text"))
(squote-att-pos (search-backward "squote attr"))
(dquote-att-pos (search-backward "dquote attr")))
;; Just make sure that each quote uses the same face for quoted
;; attribute values, and a different face for quoted text
;; outside tags. Don't test `font-lock-string-face' vs
;; `nxml-attribute-value' here.
(should (equal (get-text-property squote-att-pos 'face)
(get-text-property dquote-att-pos 'face)))
(should (equal (get-text-property squote-txt-pos 'face)
(get-text-property dquote-txt-pos 'face)))
(should-not (equal (get-text-property squote-txt-pos 'face)
(get-text-property dquote-att-pos 'face))))))
(provide 'nxml-mode-tests)
;;; nxml-mode-tests.el ends here
......@@ -125,7 +125,6 @@ The point is set to the beginning of the buffer."
(should (string= content (buffer-string))))))
(ert-deftest sgml-delete-tag-bug-8203-should-not-delete-apostrophe ()
:expected-result :failed
"<title>Winter is comin'</title>"
(sgml-delete-tag 1)
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