;;; Code:
(require 'eww)
+(require 'cl-lib)
+(require 'color)
(require 'seq)
(require 'sgml-mode)
(require 'smie)
(mapcar #'car css-property-alist)
"Identifiers for properties.")
+(defconst css--color-map
+ '(("black" . "#000000")
+ ("silver" . "#c0c0c0")
+ ("gray" . "#808080")
+ ("white" . "#ffffff")
+ ("maroon" . "#800000")
+ ("red" . "#ff0000")
+ ("purple" . "#800080")
+ ("fuchsia" . "#ff00ff")
+ ("green" . "#008000")
+ ("lime" . "#00ff00")
+ ("olive" . "#808000")
+ ("yellow" . "#ffff00")
+ ("navy" . "#000080")
+ ("blue" . "#0000ff")
+ ("teal" . "#008080")
+ ("aqua" . "#00ffff")
+ ("orange" . "#ffa500")
+ ("aliceblue" . "#f0f8ff")
+ ("antiquewhite" . "#faebd7")
+ ("aquamarine" . "#7fffd4")
+ ("azure" . "#f0ffff")
+ ("beige" . "#f5f5dc")
+ ("bisque" . "#ffe4c4")
+ ("blanchedalmond" . "#ffebcd")
+ ("blueviolet" . "#8a2be2")
+ ("brown" . "#a52a2a")
+ ("burlywood" . "#deb887")
+ ("cadetblue" . "#5f9ea0")
+ ("chartreuse" . "#7fff00")
+ ("chocolate" . "#d2691e")
+ ("coral" . "#ff7f50")
+ ("cornflowerblue" . "#6495ed")
+ ("cornsilk" . "#fff8dc")
+ ("crimson" . "#dc143c")
+ ("darkblue" . "#00008b")
+ ("darkcyan" . "#008b8b")
+ ("darkgoldenrod" . "#b8860b")
+ ("darkgray" . "#a9a9a9")
+ ("darkgreen" . "#006400")
+ ("darkgrey" . "#a9a9a9")
+ ("darkkhaki" . "#bdb76b")
+ ("darkmagenta" . "#8b008b")
+ ("darkolivegreen" . "#556b2f")
+ ("darkorange" . "#ff8c00")
+ ("darkorchid" . "#9932cc")
+ ("darkred" . "#8b0000")
+ ("darksalmon" . "#e9967a")
+ ("darkseagreen" . "#8fbc8f")
+ ("darkslateblue" . "#483d8b")
+ ("darkslategray" . "#2f4f4f")
+ ("darkslategrey" . "#2f4f4f")
+ ("darkturquoise" . "#00ced1")
+ ("darkviolet" . "#9400d3")
+ ("deeppink" . "#ff1493")
+ ("deepskyblue" . "#00bfff")
+ ("dimgray" . "#696969")
+ ("dimgrey" . "#696969")
+ ("dodgerblue" . "#1e90ff")
+ ("firebrick" . "#b22222")
+ ("floralwhite" . "#fffaf0")
+ ("forestgreen" . "#228b22")
+ ("gainsboro" . "#dcdcdc")
+ ("ghostwhite" . "#f8f8ff")
+ ("gold" . "#ffd700")
+ ("goldenrod" . "#daa520")
+ ("greenyellow" . "#adff2f")
+ ("grey" . "#808080")
+ ("honeydew" . "#f0fff0")
+ ("hotpink" . "#ff69b4")
+ ("indianred" . "#cd5c5c")
+ ("indigo" . "#4b0082")
+ ("ivory" . "#fffff0")
+ ("khaki" . "#f0e68c")
+ ("lavender" . "#e6e6fa")
+ ("lavenderblush" . "#fff0f5")
+ ("lawngreen" . "#7cfc00")
+ ("lemonchiffon" . "#fffacd")
+ ("lightblue" . "#add8e6")
+ ("lightcoral" . "#f08080")
+ ("lightcyan" . "#e0ffff")
+ ("lightgoldenrodyellow" . "#fafad2")
+ ("lightgray" . "#d3d3d3")
+ ("lightgreen" . "#90ee90")
+ ("lightgrey" . "#d3d3d3")
+ ("lightpink" . "#ffb6c1")
+ ("lightsalmon" . "#ffa07a")
+ ("lightseagreen" . "#20b2aa")
+ ("lightskyblue" . "#87cefa")
+ ("lightslategray" . "#778899")
+ ("lightslategrey" . "#778899")
+ ("lightsteelblue" . "#b0c4de")
+ ("lightyellow" . "#ffffe0")
+ ("limegreen" . "#32cd32")
+ ("linen" . "#faf0e6")
+ ("mediumaquamarine" . "#66cdaa")
+ ("mediumblue" . "#0000cd")
+ ("mediumorchid" . "#ba55d3")
+ ("mediumpurple" . "#9370db")
+ ("mediumseagreen" . "#3cb371")
+ ("mediumslateblue" . "#7b68ee")
+ ("mediumspringgreen" . "#00fa9a")
+ ("mediumturquoise" . "#48d1cc")
+ ("mediumvioletred" . "#c71585")
+ ("midnightblue" . "#191970")
+ ("mintcream" . "#f5fffa")
+ ("mistyrose" . "#ffe4e1")
+ ("moccasin" . "#ffe4b5")
+ ("navajowhite" . "#ffdead")
+ ("oldlace" . "#fdf5e6")
+ ("olivedrab" . "#6b8e23")
+ ("orangered" . "#ff4500")
+ ("orchid" . "#da70d6")
+ ("palegoldenrod" . "#eee8aa")
+ ("palegreen" . "#98fb98")
+ ("paleturquoise" . "#afeeee")
+ ("palevioletred" . "#db7093")
+ ("papayawhip" . "#ffefd5")
+ ("peachpuff" . "#ffdab9")
+ ("peru" . "#cd853f")
+ ("pink" . "#ffc0cb")
+ ("plum" . "#dda0dd")
+ ("powderblue" . "#b0e0e6")
+ ("rosybrown" . "#bc8f8f")
+ ("royalblue" . "#4169e1")
+ ("saddlebrown" . "#8b4513")
+ ("salmon" . "#fa8072")
+ ("sandybrown" . "#f4a460")
+ ("seagreen" . "#2e8b57")
+ ("seashell" . "#fff5ee")
+ ("sienna" . "#a0522d")
+ ("skyblue" . "#87ceeb")
+ ("slateblue" . "#6a5acd")
+ ("slategray" . "#708090")
+ ("slategrey" . "#708090")
+ ("snow" . "#fffafa")
+ ("springgreen" . "#00ff7f")
+ ("steelblue" . "#4682b4")
+ ("tan" . "#d2b48c")
+ ("thistle" . "#d8bfd8")
+ ("tomato" . "#ff6347")
+ ("turquoise" . "#40e0d0")
+ ("violet" . "#ee82ee")
+ ("wheat" . "#f5deb3")
+ ("whitesmoke" . "#f5f5f5")
+ ("yellowgreen" . "#9acd32")
+ ("rebeccapurple" . "#663399"))
+ "Map CSS named colors to their hex RGB value.")
+
(defconst css-value-class-alist
- '((absolute-size
+ `((absolute-size
"xx-small" "x-small" "small" "medium" "large" "x-large"
"xx-large")
(alphavalue number)
(line-width length "thin" "medium" "thick")
(linear-gradient "linear-gradient()")
(margin-width "auto" length percentage)
- (named-color
- "aliceblue" "antiquewhite" "aqua" "aquamarine" "azure" "beige"
- "bisque" "black" "blanchedalmond" "blue" "blueviolet" "brown"
- "burlywood" "cadetblue" "chartreuse" "chocolate" "coral"
- "cornflowerblue" "cornsilk" "crimson" "cyan" "darkblue"
- "darkcyan" "darkgoldenrod" "darkgray" "darkgreen" "darkkhaki"
- "darkmagenta" "darkolivegreen" "darkorange" "darkorchid"
- "darkred" "darksalmon" "darkseagreen" "darkslateblue"
- "darkslategray" "darkturquoise" "darkviolet" "deeppink"
- "deepskyblue" "dimgray" "dodgerblue" "firebrick" "floralwhite"
- "forestgreen" "fuchsia" "gainsboro" "ghostwhite" "gold"
- "goldenrod" "gray" "green" "greenyellow" "honeydew" "hotpink"
- "indianred" "indigo" "ivory" "khaki" "lavender" "lavenderblush"
- "lawngreen" "lemonchiffon" "lightblue" "lightcoral" "lightcyan"
- "lightgoldenrodyellow" "lightgray" "lightgreen" "lightpink"
- "lightsalmon" "lightseagreen" "lightskyblue" "lightslategray"
- "lightsteelblue" "lightyellow" "lime" "limegreen" "linen"
- "magenta" "maroon" "mediumaquamarine" "mediumblue" "mediumorchid"
- "mediumpurple" "mediumseagreen" "mediumslateblue"
- "mediumspringgreen" "mediumturquoise" "mediumvioletred"
- "midnightblue" "mintcream" "mistyrose" "moccasin" "navajowhite"
- "navy" "oldlace" "olive" "olivedrab" "orange" "orangered"
- "orchid" "palegoldenrod" "palegreen" "paleturquoise"
- "palevioletred" "papayawhip" "peachpuff" "peru" "pink" "plum"
- "powderblue" "purple" "rebeccapurple" "red" "rosybrown"
- "royalblue" "saddlebrown" "salmon" "sandybrown" "seagreen"
- "seashell" "sienna" "silver" "skyblue" "slateblue" "slategray"
- "snow" "springgreen" "steelblue" "tan" "teal" "thistle" "tomato"
- "turquoise" "violet" "wheat" "white" "whitesmoke" "yellow"
- "yellowgreen")
+ (named-color . ,(mapcar #'car css--color-map))
(number "calc()")
(numeric-figure-values "lining-nums" "oldstyle-nums")
(numeric-fraction-values "diagonal-fractions" "stacked-fractions")
(modify-syntax-entry ?\[ "(]" st)
(modify-syntax-entry ?\] ")[" st)
;; Special chars that sometimes come at the beginning of words.
- (modify-syntax-entry ?@ "'" st)
- ;; (modify-syntax-entry ?: "'" st)
- (modify-syntax-entry ?# "'" st)
+ ;; We'll treat them as symbol constituents.
+ (modify-syntax-entry ?@ "_" st)
+ (modify-syntax-entry ?# "_" st)
+ (modify-syntax-entry ?. "_" st)
;; Distinction between words and symbols.
(modify-syntax-entry ?- "_" st)
+
+ (modify-syntax-entry ?! "." st)
+ (modify-syntax-entry ?$ "." st)
+ (modify-syntax-entry ?% "." st)
+ (modify-syntax-entry ?& "." st)
+ (modify-syntax-entry ?+ "." st)
+ (modify-syntax-entry ?, "." st)
+ (modify-syntax-entry ?< "." st)
+ (modify-syntax-entry ?> "." st)
+ (modify-syntax-entry ?= "." st)
+ (modify-syntax-entry ?? "." st)
st))
(defvar css-mode-map
(defvar css-font-lock-defaults
'(css-font-lock-keywords nil t))
+(defconst css--number-regexp
+ "\\(\\(?:[0-9]*\\.[0-9]+\\(?:[eE][0-9]+\\)?\\)\\|[0-9]+\\)"
+ "A regular expression matching a CSS number.")
+
+(defconst css--percent-regexp "\\([0-9]+\\)%"
+ "A regular expression matching a CSS percentage.")
+
+(defconst css--number-or-percent-regexp
+ (concat "\\(?:" css--percent-regexp "\\)\\|\\(?:" css--number-regexp "\\)")
+ "A regular expression matching a CSS number or a CSS percentage.")
+
+(defconst css--angle-regexp
+ (concat css--number-regexp
+ (regexp-opt '("deg" "grad" "rad" "turn") t)
+ "?")
+ "A regular expression matching a CSS angle.")
+
+(defun css--color-skip-blanks ()
+ "Skip blanks and comments."
+ (while (forward-comment 1)))
+
+(cl-defun css--rgb-color ()
+ "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."
+ (let ((result '())
+ (iter 0))
+ (while (< iter 4)
+ (css--color-skip-blanks)
+ (unless (looking-at css--number-or-percent-regexp)
+ (cl-return-from css--rgb-color nil))
+ (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))
+ (goto-char (match-end 0))
+ (css--color-skip-blanks)
+ (cl-incf iter)
+ ;; Accept a superset of the CSS syntax since I'm feeling lazy.
+ (when (and (= (skip-chars-forward ",/") 0)
+ (= iter 3))
+ ;; The alpha is optional.
+ (cl-incf iter))
+ (css--color-skip-blanks)))
+ (when (looking-at ")")
+ (forward-char)
+ (apply #'format "#%02x%02x%02x" (nreverse result)))))
+
+(cl-defun css--hsl-color ()
+ "Parse a CSS hsl() or hsla() 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."
+ (let ((result '()))
+ ;; First parse the hue.
+ (css--color-skip-blanks)
+ (unless (looking-at css--angle-regexp)
+ (cl-return-from css--hsl-color nil))
+ (let ((hue (string-to-number (match-string 1)))
+ (unit (match-string 2)))
+ (goto-char (match-end 0))
+ ;; Note that here "turn" is just passed through.
+ (cond
+ ((or (not unit) (equal unit "deg"))
+ ;; Degrees.
+ (setq hue (/ hue 360.0)))
+ ((equal unit "grad")
+ (setq hue (/ hue 400.0)))
+ ((equal unit "rad")
+ (setq hue (/ hue (* 2 float-pi)))))
+ (push (mod hue 1.0) result))
+ (dotimes (_ 2)
+ (skip-chars-forward ",")
+ (css--color-skip-blanks)
+ (unless (looking-at css--percent-regexp)
+ (cl-return-from css--hsl-color nil))
+ (let ((number (string-to-number (match-string 1))))
+ (setq number (/ number 100.0))
+ (push (min (max number 0.0) 1.0) result)
+ (goto-char (match-end 0))
+ (css--color-skip-blanks)))
+ (css--color-skip-blanks)
+ ;; Accept a superset of the CSS syntax since I'm feeling lazy.
+ (when (> (skip-chars-forward ",/") 0)
+ (css--color-skip-blanks)
+ (unless (looking-at css--number-or-percent-regexp)
+ (cl-return-from css--hsl-color nil))
+ (goto-char (match-end 0))
+ (css--color-skip-blanks))
+ (when (looking-at ")")
+ (forward-char)
+ (apply #'color-rgb-to-hex
+ (nconc (apply #'color-hsl-to-rgb (nreverse result)) '(2))))))
+
+(defconst css--colors-regexp
+ (concat
+ ;; Named colors.
+ (regexp-opt (mapcar #'car css--color-map) 'symbols)
+ "\\|"
+ ;; Short hex. css-color-4 adds alpha.
+ "\\(#[0-9a-fA-F]\\{3,4\\}\\b\\)"
+ "\\|"
+ ;; Long hex. css-color-4 adds alpha.
+ "\\(#\\(?:[0-9a-fA-F][0-9a-fA-F]\\)\\{3,4\\}\\b\\)"
+ "\\|"
+ ;; RGB.
+ "\\(\\_<rgba?(\\)"
+ "\\|"
+ ;; HSL.
+ "\\(\\_<hsla?(\\)")
+ "A regular expression that matches the start of a CSS color.")
+
+(defun css--hex-color (str)
+ "Convert a CSS hex color to an Emacs hex color.
+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) 4)
+ (substring str 0 7)
+ (substring str 0 4)))
+
+(defun css--named-color (start-point str)
+ "Check whether STR, seen at point, is CSS named color.
+Returns STR if it is a valid color. Special care is taken
+to exclude some SCSS contructs."
+ (when-let ((color (assoc str css--color-map)))
+ (save-excursion
+ (goto-char start-point)
+ (forward-comment (- (point)))
+ (skip-chars-backward "@[:alpha:]")
+ (unless (looking-at-p "@\\(mixin\\|include\\)")
+ (cdr color)))))
+
+(defun css--compute-color (start-point match)
+ "Return the CSS color at point.
+Point should be just after the start of a CSS color, as recognized
+by `css--colors-regexp'. START-POINT is the start of the color,
+and MATCH is the string matched by the regexp.
+
+This function will either return the color, as a hex RGB string;
+or `nil' if no color could be recognized. When this function
+returns, point will be at the end of the recognized color."
+ (cond
+ ((eq (aref match 0) ?#)
+ (css--hex-color match))
+ ((member match '("rgb(" "rgba("))
+ (css--rgb-color))
+ ((member match '("hsl(" "hsla("))
+ (css--hsl-color))
+ ;; Evaluate to the color if the name is found.
+ ((css--named-color start-point match))))
+
+(defun css--contrasty-color (name)
+ "Return a color that contrasts with NAME.
+NAME is of any form accepted by `color-distance'.
+The returned color will be usable by Emacs and will contrast
+with NAME; in particular so that if NAME is used as a background
+color, the returned color can be used as the foreground and still
+be readable."
+ ;; See bug#25525 for a discussion of this.
+ (if (> (color-distance name "black") 292485)
+ "black" "white"))
+
+(defcustom css-fontify-colors t
+ "Whether CSS colors should be fontified using the color as the background.
+When non-`nil', a text representing CSS color will be fontified
+such that its background is the color itself. E.g., #ff0000 will
+be fontified with a red background."
+ :version "26.1"
+ :group 'css
+ :type 'boolean
+ :safe 'booleanp)
+
+(defun css--fontify-region (start end &optional loudly)
+ "Fontify a CSS buffer between START and END.
+START and END are buffer positions."
+ (let ((extended-region (font-lock-default-fontify-region start end loudly)))
+ (when css-fontify-colors
+ (when (and (consp extended-region)
+ (eq (car extended-region) 'jit-lock-bounds))
+ (setq start (cadr extended-region))
+ (setq end (cddr extended-region)))
+ (save-excursion
+ (let ((case-fold-search t))
+ (goto-char start)
+ (while (re-search-forward css--colors-regexp end t)
+ ;; Skip comments and strings.
+ (unless (nth 8 (syntax-ppss))
+ (let* ((start (match-beginning 0))
+ (color (css--compute-color start (match-string 0))))
+ (when color
+ (with-silent-modifications
+ ;; Use the color as the background, to make it more
+ ;; clear. Use a contrasting color as the foreground,
+ ;; to make it readable. Finally, have a small box
+ ;; using the existing foreground color, to make sure
+ ;; it stands out a bit from any other text; in
+ ;; particular this is nice when the color matches the
+ ;; buffer's background color.
+ (add-text-properties
+ start (point)
+ (list 'face (list :background color
+ :foreground (css--contrasty-color color)
+ :box '(:line-width -1))))))))))))
+ extended-region))
+
(defcustom css-indent-offset 4
"Basic size of one indentation step."
:version "22.2"
:backward-token #'css-smie--backward-token)
(setq-local electric-indent-chars
(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))
(modify-syntax-entry ?/ ". 124" st)
(modify-syntax-entry ?\n ">" st)
;; Variable names are prefixed by $.
- (modify-syntax-entry ?$ "'" st)
+ (modify-syntax-entry ?$ "_" st)
+ (modify-syntax-entry ?% "_" st)
st))
(defun scss-font-lock-keywords ()
projects / emacs.git / commitdiff