-- Copyright 2006-2018 Mitchell mitchell.att.foicica.com. See License.txt.
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-- CSS LPeg lexer.
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local lexer = require('lexer')
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local token, word_match = lexer.token, lexer.word_match
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local P, R, S, V = lpeg.P, lpeg.R, lpeg.S, lpeg.V
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local lex = lexer.new('css')
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-- Whitespace.
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lex:add_rule('whitespace', token(lexer.WHITESPACE, lexer.space^1))
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-- Properties.
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lex:add_rule('property', token('property', word_match[[
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-- CSS 1.
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color background-color background-image background-repeat
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background-attachment background-position background font-family font-style
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font-variant font-weight font-size font word-spacing letter-spacing
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text-decoration vertical-align text-transform text-align text-indent
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line-height margin-top margin-right margin-bottom margin-left margin
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padding-top padding-right padding-bottom padding-left padding border-top-width
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border-right-width border-bottom-width border-left-width border-width
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border-top border-right border-bottom border-left border border-color
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border-style width height float clear display white-space list-style-type
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list-style-image list-style-position list-style
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-- CSS 2.
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border-top-color border-right-color border-bottom-color border-left-color
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border-color border-top-style border-right-style border-bottom-style
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border-left-style border-style top right bottom left position z-index
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direction unicode-bidi min-width max-width min-height max-height overflow clip
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visibility content quotes counter-reset counter-increment marker-offset size
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marks page-break-before page-break-after page-break-inside page orphans widows
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font-stretch font-size-adjust unicode-range units-per-em src panose-1 stemv
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stemh slope cap-height x-height ascent descent widths bbox definition-src
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baseline centerline mathline topline text-shadow caption-side table-layout
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border-collapse border-spacing empty-cells speak-header cursor outline
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outline-width outline-style outline-color volume speak pause-before
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pause-after pause cue-before cue-after cue play-during azimuth elevation
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speech-rate voice-family pitch pitch-range stress richness speak-punctuation
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speak-numeral
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]]))
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lex:add_style('property', lexer.STYLE_KEYWORD)
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-- Values.
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lex:add_rule('value', token('value', word_match[[
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-- CSS 1.
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auto none normal italic oblique small-caps bold bolder lighter xx-small
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x-small small medium large x-large xx-large larger smaller transparent repeat
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repeat-x repeat-y no-repeat scroll fixed top bottom left center right justify
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both underline overline line-through blink baseline sub super text-top middle
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text-bottom capitalize uppercase lowercase thin medium thick dotted dashed
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solid double groove ridge inset outset block inline list-item pre no-wrap
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inside outside disc circle square decimal lower-roman upper-roman lower-alpha
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upper-alpha aqua black blue fuchsia gray green lime maroon navy olive purple
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red silver teal white yellow
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-- CSS 2.
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inherit run-in compact marker table inline-table table-row-group
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table-header-group table-footer-group table-row table-column-group
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table-column table-cell table-caption static relative absolute fixed ltr rtl
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embed bidi-override visible hidden scroll collapse open-quote close-quote
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no-open-quote no-close-quote decimal-leading-zero lower-greek lower-latin
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upper-latin hebrew armenian georgian cjk-ideographic hiragana katakana
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hiragana-iroha katakana-iroha landscape portrait crop cross always avoid wider
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narrower ultra-condensed extra-condensed condensed semi-condensed
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semi-expanded expanded extra-expanded ultra-expanded caption icon menu
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message-box small-caption status-bar separate show hide once crosshair default
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pointer move text wait help e-resize ne-resize nw-resize n-resize se-resize
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sw-resize s-resize w-resize ActiveBorder ActiveCaption AppWorkspace Background
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ButtonFace ButtonHighlight ButtonShadow InactiveCaptionText ButtonText
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CaptionText GrayText Highlight HighlightText InactiveBorder InactiveCaption
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InfoBackground InfoText Menu MenuText Scrollbar ThreeDDarkShadow ThreeDFace
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ThreeDHighlight ThreeDLightShadow ThreeDShadow Window WindowFrame WindowText
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silent x-soft soft medium loud x-loud spell-out mix left-side far-left
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center-left center-right far-right right-side behind leftwards rightwards
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below level above higher lower x-slow slow medium fast x-fast faster slower
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male female child x-low low high x-high code digits continous
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]]))
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lex:add_style('value', lexer.STYLE_CONSTANT)
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-- Functions.
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lex:add_rule('function', token(lexer.FUNCTION, word_match[[
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attr blackness blend blenda blur brightness calc circle color-mod contrast
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counter cubic-bezier device-cmyk drop-shadow ellipse gray grayscale hsl hsla
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hue hue-rotate hwb image inset invert lightness linear-gradient matrix
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matrix3d opacity perspective polygon radial-gradient rect
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repeating-linear-gradient repeating-radial-gradient rgb rgba rotate rotate3d
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rotateX rotateY rotateZ saturate saturation scale scale3d scaleX scaleY scaleZ
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sepia shade skewX skewY steps tint toggle translate translate3d translateX
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translateY translateZ url whiteness
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]]))
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-- Colors.
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local xdigit = lexer.xdigit
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lex:add_rule('color', token('color', word_match[[
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aliceblue antiquewhite aqua aquamarine azure beige bisque black
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blanchedalmond blue blueviolet brown burlywood cadetblue chartreuse chocolate
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coral cornflowerblue cornsilk crimson cyan darkblue darkcyan darkgoldenrod
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darkgray darkgreen darkgrey darkkhaki darkmagenta darkolivegreen darkorange
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darkorchid darkred darksalmon darkseagreen darkslateblue darkslategray
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darkslategrey darkturquoise darkviolet deeppink deepskyblue dimgray dimgrey
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dodgerblue firebrick floralwhite forestgreen fuchsia gainsboro ghostwhite gold
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goldenrod gray green greenyellow grey honeydew hotpink indianred indigo ivory
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khaki lavender lavenderblush lawngreen lemonchiffon lightblue lightcoral
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lightcyan lightgoldenrodyellow lightgray lightgreen lightgrey lightpink
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lightsalmon lightseagreen lightskyblue lightslategray lightslategrey
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lightsteelblue lightyellow lime limegreen linen magenta maroon
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mediumaquamarine mediumblue mediumorchid mediumpurple mediumseagreen
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mediumslateblue mediumspringgreen mediumturquoise mediumvioletred
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midnightblue mintcream mistyrose moccasin navajowhite navy oldlace olive
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olivedrab orange orangered orchid palegoldenrod palegreen paleturquoise
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palevioletred papayawhip peachpuff peru pink plum powderblue purple
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rebeccapurple red rosybrown royalblue saddlebrown salmon sandybrown seagreen
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seashell sienna silver skyblue slateblue slategray slategrey snow springgreen
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steelblue tan teal thistle tomato transparent turquoise violet wheat white
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whitesmoke yellow yellowgreen
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]] + '#' * xdigit * xdigit * xdigit * (xdigit * xdigit * xdigit)^-1))
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lex:add_style('color', lexer.STYLE_NUMBER)
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-- Identifiers.
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lex:add_rule('identifier', token(lexer.IDENTIFIER, lexer.alpha *
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(lexer.alnum + S('_-'))^0))
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-- Pseudo classes and pseudo elements.
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lex:add_rule('pseudoclass', ':' * token('pseudoclass', word_match[[
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active checked disabled empty enabled first-child first-of-type focus hover
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in-range invalid lang last-child last-of-type link not nth-child
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nth-last-child nth-last-of-type nth-of-type only-of-type only-child optional
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out-of-range read-only read-write required root target valid visited
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]]))
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lex:add_style('pseudoclass', lexer.STYLE_CONSTANT)
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lex:add_rule('pseudoelement', '::' * token('pseudoelement', word_match[[
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after before first-letter first-line selection
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]]))
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lex:add_style('pseudoelement', lexer.STYLE_CONSTANT)
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-- Strings.
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lex:add_rule('string', token(lexer.STRING, lexer.delimited_range("'") +
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lexer.delimited_range('"')))
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-- Comments.
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lex:add_rule('comment', token(lexer.COMMENT, '/*' * (lexer.any - '*/')^0 *
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P('*/')^-1))
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-- Numbers.
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local unit = token('unit', word_match[[
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ch cm deg dpcm dpi dppx em ex grad Hz in kHz mm ms pc pt px q rad rem s turn
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vh vmax vmin vw
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]])
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lex:add_style('unit', lexer.STYLE_NUMBER)
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lex:add_rule('number', token(lexer.NUMBER, lexer.digit^1) * unit^-1)
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-- Operators.
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lex:add_rule('operator', token(lexer.OPERATOR, S('~!#*>+=|.,:;()[]{}')))
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-- At rule.
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lex:add_rule('at_rule', token('at_rule', P('@') * word_match[[
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charset font-face media page import namespace
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]]))
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lex:add_style('at_rule', lexer.STYLE_PREPROCESSOR)
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-- Fold points.
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lex:add_fold_point(lexer.OPERATOR, '{', '}')
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lex:add_fold_point(lexer.COMMENT, '/*', '*/')
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return lex
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