diff options
Diffstat (limited to 'lisp/textmodes/css-mode.el')
| -rw-r--r-- | lisp/textmodes/css-mode.el | 276 |
1 files changed, 247 insertions, 29 deletions
diff --git a/lisp/textmodes/css-mode.el b/lisp/textmodes/css-mode.el index 67a0c9f7a57..11a77b5bb78 100644 --- a/lisp/textmodes/css-mode.el +++ b/lisp/textmodes/css-mode.el @@ -34,9 +34,12 @@ (require 'cl-lib) (require 'color) +(require 'eww) +(require 'imenu) (require 'seq) (require 'sgml-mode) (require 'smie) +(require 'thingatpt) (eval-when-compile (require 'subr-x)) (defgroup css nil @@ -109,7 +112,6 @@ ("bottom" length percentage "auto") ("caption-side" "top" "bottom") ("clear" "none" "left" "right" "both") - ("clip" shape "auto") ("content" "normal" "none" string uri counter "attr()" "open-quote" "close-quote" "no-open-quote" "no-close-quote") ("counter-increment" identifier integer "none") @@ -372,6 +374,31 @@ ("orphans" integer) ("widows" integer) + ;; CSS Masking Module Level 1 + ;; (https://www.w3.org/TR/css-masking-1/#property-index) + ("clip-path" clip-source basic-shape geometry-box "none") + ("clip-rule" "nonzero" "evenodd") + ("mask-image" mask-reference) + ("mask-mode" masking-mode) + ("mask-repeat" repeat-style) + ("mask-position" position) + ("mask-clip" geometry-box "no-clip") + ("mask-origin" geometry-box) + ("mask-size" bg-size) + ("mask-composite" compositing-operator) + ("mask" mask-layer) + ("mask-border-source" "none" image) + ("mask-border-mode" "luminance" "alpha") + ("mask-border-slice" number percentage "fill") + ("mask-border-width" length percentage number "auto") + ("mask-border-outset" length number) + ("mask-border-repeat" "stretch" "repeat" "round" "space") + ("mask-border" mask-border-source mask-border-slice + mask-border-width mask-border-outset mask-border-repeat + mask-border-mode) + ("mask-type" "luminance" "alpha") + ("clip" "rect()" "auto") + ;; CSS Multi-column Layout Module ;; (https://www.w3.org/TR/css3-multicol/#property-index) ;; "break-after", "break-before", and "break-inside" are left out @@ -649,14 +676,17 @@ further value candidates, since that list would be infinite.") (attachment "scroll" "fixed" "local") (auto-repeat "repeat()") (auto-track-list line-names fixed-size fixed-repeat auto-repeat) + (basic-shape "inset()" "circle()" "ellipse()" "polygon()") (bg-image image "none") (bg-layer bg-image position repeat-style attachment box) (bg-size length percentage "auto" "cover" "contain") (box "border-box" "padding-box" "content-box") + (clip-source uri) (color "rgb()" "rgba()" "hsl()" "hsla()" named-color "transparent" "currentColor") (common-lig-values "common-ligatures" "no-common-ligatures") + (compositing-operator "add" "subtract" "intersect" "exclude") (contextual-alt-values "contextual" "no-contextual") (counter "counter()" "counters()") (discretionary-lig-values @@ -682,6 +712,7 @@ further value candidates, since that list would be infinite.") (generic-family "serif" "sans-serif" "cursive" "fantasy" "monospace") (generic-voice "male" "female" "child") + (geometry-box shape-box "fill-box" "stroke-box" "view-box") (gradient linear-gradient radial-gradient repeating-linear-gradient repeating-radial-gradient) @@ -702,6 +733,12 @@ further value candidates, since that list would be infinite.") (line-width length "thin" "medium" "thick") (linear-gradient "linear-gradient()") (margin-width "auto" length percentage) + (mask-layer + mask-reference masking-mode position bg-size repeat-style + geometry-box "no-clip" compositing-operator) + (mask-reference "none" image mask-source) + (mask-source uri) + (masking-mode "alpha" "luminance" "auto") (named-color . ,(mapcar #'car css--color-map)) (number "calc()") (numeric-figure-values "lining-nums" "oldstyle-nums") @@ -717,7 +754,7 @@ further value candidates, since that list would be infinite.") (repeating-linear-gradient "repeating-linear-gradient()") (repeating-radial-gradient "repeating-radial-gradient()") (shadow "inset" length color) - (shape "rect()") + (shape-box box "margin-box") (single-animation-direction "normal" "reverse" "alternate" "alternate-reverse") (single-animation-fill-mode "none" "forwards" "backwards" "both") @@ -807,6 +844,7 @@ cannot be completed sensibly: `custom-ident', (defvar css-mode-map (let ((map (make-sparse-keymap))) (define-key map [remap info-lookup-symbol] 'css-lookup-symbol) + (define-key map "\C-c\C-f" 'css-cycle-color-format) map) "Keymap used in `css-mode'.") @@ -854,7 +892,7 @@ cannot be completed sensibly: `custom-ident', (,(concat "@" css-ident-re) (0 font-lock-builtin-face)) ;; Selectors. ;; Allow plain ":root" as a selector. - ("^[ \t]*\\(:root\\)\\(?:[\n \t]*\\)*{" (1 'css-selector keep)) + ("^[ \t]*\\(:root\\)[\n \t]*{" (1 'css-selector keep)) ;; FIXME: attribute selectors don't work well because they may contain ;; strings which have already been highlighted as f-l-string-face and ;; thus prevent this highlighting from being applied (actually now that @@ -877,7 +915,7 @@ cannot be completed sensibly: `custom-ident', "\\(?:\\(:" (regexp-opt (append css-pseudo-class-ids css-pseudo-element-ids) t) - "\\|\\::" (regexp-opt css-pseudo-element-ids t) "\\)" + "\\|::" (regexp-opt css-pseudo-element-ids t) "\\)" "\\(?:([^)]+)\\)?" (if (not sassy) "[^:{}()\n]*" @@ -897,7 +935,7 @@ cannot be completed sensibly: `custom-ident', ;; No face. nil))) ;; Variables. - (,(concat "--" css-ident-re) (0 font-lock-variable-name-face)) + (,(concat (rx symbol-start) "--" css-ident-re) (0 font-lock-variable-name-face)) ;; Properties. Again, we don't limit ourselves to css-property-ids. (,(concat "\\(?:[{;]\\|^\\)[ \t]*\\(" "\\(?:\\(" css-proprietary-nmstart-re "\\)\\|" @@ -937,11 +975,13 @@ cannot be completed sensibly: `custom-ident', "Skip blanks and comments." (while (forward-comment 1))) -(cl-defun css--rgb-color () +(cl-defun css--rgb-color (&optional include-alpha) "Parse a CSS rgb() or rgba() color. Point should be just after the open paren. Returns a hex RGB color, or nil if the color could not be recognized. -This recognizes CSS-color-4 extensions." +This recognizes CSS-color-4 extensions. +When INCLUDE-ALPHA is non-nil, the alpha component is included in +the returned hex string." (let ((result '()) (iter 0)) (while (< iter 4) @@ -951,11 +991,11 @@ This recognizes CSS-color-4 extensions." (let* ((is-percent (match-beginning 1)) (str (match-string (if is-percent 1 2))) (number (string-to-number str))) - (when is-percent - (setq number (* 255 (/ number 100.0)))) - ;; Don't push the alpha. - (when (< iter 3) - (push (min (max 0 (truncate number)) 255) result)) + (if is-percent + (setq number (* 255 (/ number 100.0))) + (when (and include-alpha (= iter 3)) + (setq number (* number 255)))) + (push (min (max 0 (round number)) 255) result) (goto-char (match-end 0)) (css--color-skip-blanks) (cl-incf iter) @@ -967,7 +1007,11 @@ This recognizes CSS-color-4 extensions." (css--color-skip-blanks))) (when (looking-at ")") (forward-char) - (apply #'format "#%02x%02x%02x" (nreverse result))))) + (apply #'format + (if (and include-alpha (= (length result) 4)) + "#%02x%02x%02x%02x" + "#%02x%02x%02x") + (nreverse result))))) (cl-defun css--hsl-color () "Parse a CSS hsl() or hsla() color. @@ -1038,9 +1082,15 @@ This recognizes CSS-color-4 extensions." STR is the incoming CSS hex color. This function simply drops any transparency." ;; Either #RGB or #RRGGBB, drop the "A" or "AA". - (if (> (length str) 5) - (substring str 0 7) - (substring str 0 4))) + (substring str 0 (if (> (length str) 5) 7 4))) + +(defun css--hex-alpha (hex) + "Return the alpha component of CSS color HEX. +HEX can either be in the #RGBA or #RRGGBBAA format. Return nil +if the color doesn't have an alpha component." + (cl-case (length hex) + (5 (string (elt hex 4))) + (9 (substring hex 7 9)))) (defun css--named-color (start-point str) "Check whether STR, seen at point, is CSS named color. @@ -1200,19 +1250,20 @@ for determining whether point is within a selector." (defun css-smie-rules (kind token) (pcase (cons kind token) - (`(:elem . basic) css-indent-offset) - (`(:elem . arg) 0) - (`(:list-intro . ,(or `";" `"")) t) ;"" stands for BOB (bug#15467). - (`(:before . "{") + ('(:elem . basic) css-indent-offset) + ('(:elem . arg) 0) + ;; "" stands for BOB (bug#15467). + (`(:list-intro . ,(or ";" "" ":-property")) t) + ('(:before . "{") (when (or (smie-rule-hanging-p) (smie-rule-bolp)) (smie-backward-sexp ";") (unless (eq (char-after) ?\{) (smie-indent-virtual)))) - (`(:before . "(") + ('(:before . "(") (cond ((smie-rule-hanging-p) (smie-rule-parent 0)) ((not (smie-rule-bolp)) 0))) - (`(:after . ":-property") + ('(:after . ":-property") (when (smie-rule-hanging-p) css-indent-offset)))) @@ -1384,6 +1435,171 @@ tags, classes and IDs." (progn (insert ": ;") (forward-char -1)))))))))) +(defun css--color-to-4-dpc (hex) + "Convert the CSS color HEX to four digits per component. +CSS colors use one or two digits per component for RGB hex +values. Convert the given color to four digits per component. + +Note that this function handles CSS colors specifically, and +should not be mixed with those in color.el." + (let ((six-digits (= (length hex) 7))) + (apply + #'concat + `("#" + ,@(seq-mapcat + (apply-partially #'make-list (if six-digits 2 4)) + (seq-partition (seq-drop hex 1) (if six-digits 2 1))))))) + +(defun css--format-hex (hex) + "Format a CSS hex color by shortening it if possible." + (let ((parts (seq-partition (seq-drop hex 1) 2))) + (if (and (>= (length hex) 6) + (seq-every-p (lambda (p) (eq (elt p 0) (elt p 1))) parts)) + (apply #'string + (cons ?# (mapcar (lambda (p) (elt p 0)) parts))) + hex))) + +(defun css--named-color-to-hex () + "Convert named CSS color at point to hex format. +Return non-nil if a conversion was made. + +Note that this function handles CSS colors specifically, and +should not be mixed with those in color.el." + (save-excursion + (unless (or (looking-at css--colors-regexp) + (eq (char-before) ?#)) + (backward-word)) + (when (member (word-at-point) (mapcar #'car css--color-map)) + (looking-at css--colors-regexp) + (let ((color (css--compute-color (point) (match-string 0)))) + (replace-match (css--format-hex color))) + t))) + +(defun css--format-rgba-alpha (alpha) + "Return ALPHA component formatted for use in rgba()." + (let ((a (string-to-number (format "%.2f" alpha)))) + (if (or (= a 0) + (= a 1)) + (format "%d" a) + (string-remove-suffix "0" (number-to-string a))))) + +(defun css--hex-to-rgb () + "Convert CSS hex color at point to RGB format. +Return non-nil if a conversion was made. + +Note that this function handles CSS colors specifically, and +should not be mixed with those in color.el." + (save-excursion + (unless (or (eq (char-after) ?#) + (eq (char-before) ?\()) + (backward-sexp)) + (when-let* ((hex (when (looking-at css--colors-regexp) + (and (eq (elt (match-string 0) 0) ?#) + (match-string 0)))) + (rgb (css--hex-color hex))) + (seq-let (r g b) + (mapcar (lambda (x) (round (* x 255))) + (color-name-to-rgb (css--color-to-4-dpc rgb))) + (replace-match + (if-let* ((alpha (css--hex-alpha hex)) + (a (css--format-rgba-alpha + (/ (string-to-number alpha 16) + (float (- (expt 16 (length alpha)) 1)))))) + (format "rgba(%d, %d, %d, %s)" r g b a) + (format "rgb(%d, %d, %d)" r g b)) + t)) + t))) + +(defun css--rgb-to-named-color-or-hex () + "Convert CSS RGB color at point to a named color or hex format. +Convert to a named color if the color at point has a name, else +convert to hex format. Return non-nil if a conversion was made. + +Note that this function handles CSS colors specifically, and +should not be mixed with those in color.el." + (save-excursion + (when-let* ((open-paren-pos (nth 1 (syntax-ppss)))) + (when (save-excursion + (goto-char open-paren-pos) + (looking-back "rgba?" (- (point) 4))) + (goto-char (nth 1 (syntax-ppss))))) + (when (eq (char-before) ?\)) + (backward-sexp)) + (skip-chars-backward "rgba") + (when (looking-at css--colors-regexp) + (let* ((start (match-end 0)) + (color (save-excursion + (goto-char start) + (css--rgb-color t)))) + (when color + (kill-sexp) + (kill-sexp) + (let ((named-color (seq-find (lambda (x) (equal (cdr x) color)) + css--color-map))) + (insert (if named-color + (car named-color) + (css--format-hex color)))) + t))))) + +(defun css-cycle-color-format () + "Cycle the color at point between different CSS color formats. +Supported formats are by name (if possible), hexadecimal, and +rgb()/rgba()." + (interactive) + (or (css--named-color-to-hex) + (css--hex-to-rgb) + (css--rgb-to-named-color-or-hex) + (message "It doesn't look like a color at point"))) + +(defun css--join-nested-selectors (selectors) + "Join a list of nested CSS selectors." + (let ((processed '()) + (prev nil)) + (dolist (sel selectors) + (cond + ((seq-contains-p sel ?&) + (setq sel (replace-regexp-in-string "&" prev sel)) + (pop processed)) + ;; Unless this is the first selector, separate this one and the + ;; previous one by a space. + (processed + (push " " processed))) + (push sel processed) + (setq prev sel)) + (apply #'concat (nreverse processed)))) + +(defun css--prev-index-position () + (when (nth 7 (syntax-ppss)) + (goto-char (comment-beginning))) + (forward-comment (- (point))) + (when (search-backward "{" (point-min) t) + (if (re-search-backward "}\\|;\\|{" (point-min) t) + (forward-char) + (goto-char (point-min))) + (forward-comment (point-max)) + (save-excursion (re-search-forward "[^{;]*")))) + +(defun css--extract-index-name () + (save-excursion + (let ((res (list (match-string-no-properties 0)))) + (condition-case nil + (while t + (goto-char (nth 1 (syntax-ppss))) + (if (re-search-backward "}\\|;\\|{" (point-min) t) + (forward-char) + (goto-char (point-min))) + (forward-comment (point-max)) + (when (save-excursion + (re-search-forward "[^{;]*")) + (push (match-string-no-properties 0) res))) + (error + (css--join-nested-selectors + (mapcar + (lambda (s) + (string-trim + (replace-regexp-in-string "[\n ]+" " " s))) + res))))))) + ;;;###autoload (define-derived-mode css-mode prog-mode "CSS" "Major mode to edit Cascading Style Sheets (CSS). @@ -1422,7 +1638,13 @@ be used to fill comments. (append css-electric-keys electric-indent-chars)) (setq-local font-lock-fontify-region-function #'css--fontify-region) (add-hook 'completion-at-point-functions - #'css-completion-at-point nil 'local)) + #'css-completion-at-point nil 'local) + ;; The default "." creates ambiguity with class selectors. + (setq-local imenu-space-replacement " ") + (setq-local imenu-prev-index-position-function + #'css--prev-index-position) + (setq-local imenu-extract-index-name-function + #'css--extract-index-name)) (defvar comment-continue) @@ -1519,12 +1741,8 @@ be used to fill comments. (defun css-current-defun-name () "Return the name of the CSS section at point, or nil." (save-excursion - (let ((max (max (point-min) (- (point) 1600)))) ; approx 20 lines back - (when (search-backward "{" max t) - (skip-chars-backward " \t\r\n") - (beginning-of-line) - (if (looking-at "^[ \t]*\\([^{\r\n]*[^ {\t\r\n]\\)") - (match-string-no-properties 1)))))) + (when (css--prev-index-position) + (css--extract-index-name)))) ;;; SCSS mode |