update color plucking logic (#113)

Author: Brad Cornes

packages/tailwindcss-language-server/package-lock.json

@@ -16,6 +16,7 @@
     "node": "*"
   },
   "devDependencies": {
+    "@ctrl/tinycolor": "^3.1.0",
     "@types/node": "^13.9.3",
     "@zeit/ncc": "^0.22.0",
     "css.escape": "^1.5.1",

packages/tailwindcss-language-server/package.json

@@ -1,6 +1,8 @@
 const dlv = require('dlv')
 import { State } from './state'
 import removeMeta from './removeMeta'
+import { TinyColor } from '@ctrl/tinycolor'
+import { ensureArray, dedupe, flatten } from './array'
 
 const COLOR_PROPS = [
   'caret-color',
@@ -19,202 +21,75 @@ const COLOR_PROPS = [
   'text-decoration-color',
 ]
 
-const COLOR_NAMES = {
-  transparent: 'rgba(0, 0, 0, 0.01)',
-  aliceblue: '#f0f8ff',
-  antiquewhite: '#faebd7',
-  aqua: '#0ff',
-  aquamarine: '#7fffd4',
-  azure: '#f0ffff',
-  beige: '#f5f5dc',
-  bisque: '#ffe4c4',
-  black: '#000',
-  blanchedalmond: '#ffebcd',
-  blue: '#00f',
-  blueviolet: '#8a2be2',
-  brown: '#a52a2a',
-  burlywood: '#deb887',
-  burntsienna: '#ea7e5d',
-  cadetblue: '#5f9ea0',
-  chartreuse: '#7fff00',
-  chocolate: '#d2691e',
-  coral: '#ff7f50',
-  cornflowerblue: '#6495ed',
-  cornsilk: '#fff8dc',
-  crimson: '#dc143c',
-  cyan: '#0ff',
-  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',
-  fuchsia: '#f0f',
-  gainsboro: '#dcdcdc',
-  ghostwhite: '#f8f8ff',
-  gold: '#ffd700',
-  goldenrod: '#daa520',
-  gray: '#808080',
-  green: '#008000',
-  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: '#789',
-  lightslategrey: '#789',
-  lightsteelblue: '#b0c4de',
-  lightyellow: '#ffffe0',
-  lime: '#0f0',
-  limegreen: '#32cd32',
-  linen: '#faf0e6',
-  magenta: '#f0f',
-  maroon: '#800000',
-  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',
-  navy: '#000080',
-  oldlace: '#fdf5e6',
-  olive: '#808000',
-  olivedrab: '#6b8e23',
-  orange: '#ffa500',
-  orangered: '#ff4500',
-  orchid: '#da70d6',
-  palegoldenrod: '#eee8aa',
-  palegreen: '#98fb98',
-  paleturquoise: '#afeeee',
-  palevioletred: '#db7093',
-  papayawhip: '#ffefd5',
-  peachpuff: '#ffdab9',
-  peru: '#cd853f',
-  pink: '#ffc0cb',
-  plum: '#dda0dd',
-  powderblue: '#b0e0e6',
-  purple: '#800080',
-  rebeccapurple: '#663399',
-  red: '#f00',
-  rosybrown: '#bc8f8f',
-  royalblue: '#4169e1',
-  saddlebrown: '#8b4513',
-  salmon: '#fa8072',
-  sandybrown: '#f4a460',
-  seagreen: '#2e8b57',
-  seashell: '#fff5ee',
-  sienna: '#a0522d',
-  silver: '#c0c0c0',
-  skyblue: '#87ceeb',
-  slateblue: '#6a5acd',
-  slategray: '#708090',
-  slategrey: '#708090',
-  snow: '#fffafa',
-  springgreen: '#00ff7f',
-  steelblue: '#4682b4',
-  tan: '#d2b48c',
-  teal: '#008080',
-  thistle: '#d8bfd8',
-  tomato: '#ff6347',
-  turquoise: '#40e0d0',
-  violet: '#ee82ee',
-  wheat: '#f5deb3',
-  white: '#fff',
-  whitesmoke: '#f5f5f5',
-  yellow: '#ff0',
-  yellowgreen: '#9acd32',
-}
-
 export function getColor(
   state: State,
   keys: string[]
 ): { documentation?: string } {
   const item = dlv(state.classNames.classNames, keys)
   if (!item.__rule) return null
   const props = Object.keys(removeMeta(item))
+  if (props.length === 0) return null
   const nonCustomProps = props.filter((prop) => !prop.startsWith('--'))
-  if (nonCustomProps.length !== 1) return null
-  const prop = nonCustomProps[0]
-  if (COLOR_PROPS.indexOf(prop) === -1) return null
 
-  const namedColor = COLOR_NAMES[item[prop].toLowerCase()]
-  if (namedColor) {
-    return { documentation: namedColor }
+  const areAllCustom = nonCustomProps.length === 0
+
+  if (
+    !areAllCustom &&
+    nonCustomProps.some((prop) => !COLOR_PROPS.includes(prop))
+  ) {
+    // they should all be color-based props
+    return null
   }
 
-  // matches: rgba(<r>, <g>, <b>, var(--bg-opacity))
-  // TODO: support other formats? e.g. hsla, css level 4
-  const match = item[prop].match(
-    /^\s*rgba\(\s*(?<r>[0-9]{1,3})\s*,\s*(?<g>[0-9]{1,3})\s*,\s*(?<b>[0-9]{1,3})\s*,\s*var/
+  const propsToCheck = areAllCustom ? props : nonCustomProps
+
+  const colors = flatten(
+    propsToCheck.map((prop) => ensureArray(item[prop]).map(createColor))
   )
-  if (match) {
-    return {
-      documentation: `rgb(${match.groups.r}, ${match.groups.g}, ${match.groups.b})`,
-    }
+
+  // check that all of the values are valid colors
+  if (colors.some((color) => !color.isValid)) {
+    return null
   }
 
-  return {}
-}
+  // check that all of the values are the same color
+  const colorStrings = colors.map((color) => color.toRgbString())
+  if (dedupe(colorStrings).length !== 1) {
+    return null
+  }
 
-export function isColor(str: any): boolean {
-  return (
-    typeof str === 'string' &&
-    /^(?:#|0x)(?:[a-f0-9]{3,4}|[a-f0-9]{6}|[a-f0-9]{8})\b|(?:rgb|hsl)a?\([^\)]*\)$/.test(
-      str.trim()
-    )
-  )
+  return { documentation: colorStrings[0] }
 }
 
 export function getColorFromString(str: string): string {
-  if (isColor(str)) {
-    return str
+  if (str === 'transparent') {
+    return 'rgba(0, 0, 0, 0.01)'
+  }
+  const color = new TinyColor(str)
+  if (color.isValid) {
+    return color.toRgbString()
   }
-  return COLOR_NAMES[str] || null
+  return null
+}
+
+function createColor(str: string): TinyColor {
+  if (str === 'transparent') {
+    return new TinyColor({ r: 0, g: 0, b: 0, a: 0.01 })
+  }
+
+  // matches: rgba(<r>, <g>, <b>, var(--bg-opacity))
+  // TODO: support other formats? e.g. hsla, css level 4
+  const match = str.match(
+    /^\s*rgba\(\s*(?<r>[0-9]{1,3})\s*,\s*(?<g>[0-9]{1,3})\s*,\s*(?<b>[0-9]{1,3})\s*,\s*var/
+  )
+
+  if (match) {
+    return new TinyColor({
+      r: match.groups.r,
+      g: match.groups.g,
+      b: match.groups.b,
+    })
+  }
+
+  return new TinyColor(str)
 }