* lisp/textmodes/css-mode.el (css-class-list-function): New variable
holding the function to call for retrieving completions of class
names.
(css-id-list-function): New variable holding the function to call for
retrieving completions of IDs.
(css--foreign-completions): New function for retrieving completions
from other buffers.
(css--complete-selector): Support completing HTML class names and IDs
from other buffers in addition to completing HTML tags.
* lisp/textmodes/sgml-mode.el (html--buffer-classes-cache): New
variable holding a cache for `html-current-buffer-classes'.
(html--buffer-ids-cache): New variable holding a cache for
`html-current-buffer-ids'.
(html-current-buffer-classes): New function returning a list of class
names used in the current buffer.
(html-current-buffer-ids): New function returning a list of IDs used
in the current buffer.
(html-mode): Set `css-class-list-function' and `css-id-list-function'
to `html-current-buffer-classes' and `html-current-buffer-ids'
respectively.
* lisp/textmodes/css-mode.el (css--complete-property-value): Make
"initial" and "unset" completion candidates for all CSS properties,
just like "inherit".
* test/lisp/textmodes/css-mode-tests.el
(css-test-complete-property-value): Update test to reflect the above
change.
* lisp/textmodes/css-mode.el (css--html-tags): New variable holding a
list of HTML tags for completion.
(css--nested-selectors-allowed): New variable for determining whether
nested selectors are allowed in the current mode.
(css--complete-selector): New function for completing part of a CSS
selector.
(css-completion-at-point): Support completion of selectors.
(scss-mode): Allow nested selectors.
* lisp/textmodes/css-mode.el (css-value-class-alist): Add `calc()' as
a completion candidate for several value classes.
(css--value-class-lookup): Return only unique results.
* test/lisp/textmodes/css-mode-tests.el
(css-test-property-values-no-duplicates)
(css-test-value-class-lookup): Update to reflect the above changes.
* lisp/textmodes/css-mode.el (css--property-values): Don't return
duplicate values.
* test/lisp/textmodes/css-mode-tests.el (css-test-property-values):
Take the above into account.
(css-test-property-values-no-duplicates): Test that duplicates aren't
returned by `css--property-values'.
* lisp/textmodes/css-mode.el (css--property-values): Cache computed
values.
* test/lisp/textmodes/css-mode-tests.el (css-test-property-value-cache):
New regression test for the above.
lisp/textmodes/css-mode.el (scss-at-ids): New defconst holding
SCSS-specific at-rules.
(css--at-ids): New buffer-local variable holding the list of at-rules
for the current mode.
(css--complete-at-rule): Retrieve at-rules from `css--at-ids`.
(scss-mode): Set `css--at-ids'.
Copyright-paperwork-exempt: yes
lisp/textmodes/css-mode.el (css--bang-ids): New buffer-local variable
holding the list of bang-rules for the current mode.
(css--font-lock-keywords): Retrieve bang-rules from `css--bang-ids'
instead of computing them.
(css--complete-bang-rule): New function for completing a bang-rule.
(css-completion-at-point): Add support for completing bang-rules.
(scss-font-lock-keywords): Change from a variable to a function in
order to recompute `css--font-lock-keywords' when `css--bang-ids' has
changed.
(scss-mode): Set `css--bang-ids' and recompute font-lock keywords.
* lisp/textmodes/css-mode.el (css-property-alist): New defconst
holding CSS identifiers and the values they can have.
(css-property-ids): Compute dynamically from `css-property-alist'.
(css-value-class-alist): New defconst holding property value classes
and their values.
(css--property-value-cache): New variable providing a cache for
`css--property-values'.
(css--value-class-lookup): New function for computing a list of values
in a value class.
(css--property-values): New function for computing a list of possible
values for a CSS property.
(css--complete-property-value): New function for completing a property
value.
(css-completion-at-point): Add support for completing property values.
* test/lisp/textmodes/css-mode-tests.el: New file.
* lisp/textmodes/css-mode.el (css-bang-ids): New defconst holding CSS
identifiers on the form !foo.
(scss-bang-ids): New defconst holding SCSS identifiers on the form
!foo.
(css--font-lock-keywords): Highlight the new SCSS bang identifiers in
`font-lock-builtin-face'.
* test/indent/css-mode.css: Add bang rule test case.
* test/indent/scss-mode.css: Add test cases for the introduced bang
rules.
* lisp/textmodes/css-mode.el (css--font-lock-keywords): Disallow
parenthesis in selectors except for in the function notation that
might appear right after a pseudo-class.
* test/indent/scss-mode.scss: Add a test for it.
This patch should not change behavior. It typically omits backslashes
where they are redundant (e.g., in the string literal "^\$").
In a few places, insert backslashes where they make regular
expressions clearer: e.g., replace "^\*" (equivalent to "^*") with
"^\\*", which has the same effect as a regular expression.
Also, use ‘\ %’ instead of ‘\%’ when avoiding confusion with SCCS IDs,
and similarly use ‘\ $’ instead of ‘\$’ when avoiding confusion with
RCS IDs, as that makes it clearer that the backslash is intended.
* lisp/textmodes/css-mode.el (css--uri-re): New defconst.
(css-syntax-propertize-function): New defconst.
(css--font-lock-keywords): Handle parens around unquoted URIs.
(css-mode): Set `syntax-propertize-function'.
Fixes: debbugs:20256
* lisp/textmodes/css-mode.el (css-fill-paragraph): Support multi-line
comment filling.
(css-adaptive-fill): New function.
(css-mode): Set `adaptive-fill-function'.
(scss-mode): Set `comment-continue'.
* textmodes/css-mode.el (css-extract-keyword-list): Remove function in
favor of manual extraction.
(css-extract-parse-val-grammar): Remove function in favor of
manual extraction.
(css-extract-props-and-vals): Remove function in favor of manual
extraction.
(css-at-ids): Update list of CSS at-rule ids.
(css-property-ids): Update list of CSS properties.
* textmodes/css-mode.el (css--complete-property): New function for
completing CSS properties.
(css--complete-pseudo-element-or-class): New function for
completing CSS pseudo-elements and pseudo-classes.
(css--complete-at-rule): New function for completing CSS at-rules.
(css-completion-at-point): New function providing completion for
`css-mode'.
(css-mode): Add support for completion.
* textmodes/css-mode.el (css--font-lock-keywords): Discriminate
between pseudo-classes and pseudo-elements.
(css-pseudo-ids): Remove.
(css-pseudo-class-ids): New variable.
(css-pseudo-element-ids): New variable.
(css-mode-syntax-table): Use d style comment, to ease the scss case.
(css-ident-re): Allow things like @-moz-keyframes.
(scss--hash-re): New const.
(css--font-lock-keywords): New function, extracted from
css-font-lock-keywords.
(css-font-lock-keywords): Use it.
(scss-mode-syntax-table, scss-font-lock-keywords): New vars.
(scss-smie--not-interpolation-p): New function.
(css-smie--forward-token, css-smie--backward-token): Use it.
(css-mode): Remove left-over code.
* test/indent/scss-mode.scss: New file.
* test/indent/css-mode.css: Add a few uneventful examples.
(css-smie-grammar): New var.
(css-smie--forward-token, css-smie--backward-token)
(css-smie-rules): New functions.
(css-mode): Use them.
(css-navigation-syntax-table): Remove var.
(css-backward-sexp, css-forward-sexp, css-indent-calculate-virtual)
(css-indent-calculate, css-indent-line): Remove functions.
* textmodes/css-mode.el (css-current-defun-name): New function.
(css-mode): Use it.
* textmodes/sgml-mode.el (html-current-defun-name): New function.
(html-mode): Use it.
