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"""
Parsing for CSS colour values.
Supported formats:
* hex literal short: #fff
* hex literal long: #fafafa
* rgb bytes: rgb(255,100,0)
* rgb percent: rgb(100%,100%,0%)
* named color: black
"""
import string
import urlparse
from pyparsing import nums, Literal, Optional, oneOf, Group, StringEnd, Combine, Word, alphas, hexnums
from enable.savage.svg.pathdata import number, sign
number = number.copy()
integerConstant = Word(nums+"+-").setParseAction(lambda t:int(t[0]))
#rgb format parser
comma = Literal(",").suppress()
def clampColourByte(val):
val = int(val)
return min(max(0,val), 255)
def clampColourPerc(val):
val = float(val)
return min(max(0,val), 100)
def parseColorPerc(token):
val = token[0]
val = clampColourPerc(val)
#normalize to bytes
return int(255 * (val / 100.0))
colorByte = Optional(sign) + integerConstant.setParseAction(lambda t: clampColourByte(t[0]))
colorPerc = number.setParseAction(parseColorPerc) + Literal("%").suppress()
rgb = (
Literal("rgb(").setParseAction(lambda t: "RGB") +
(
#integer constants, ie 255,255,255
Group(colorByte + comma + colorByte + comma + colorByte) ^
#percentage values, ie 100%, 50%
Group(colorPerc + comma + colorPerc + comma + colorPerc)
)
+
Literal(")").suppress() + StringEnd()
)
def parseShortHex(t):
return tuple(int(x*2, 16) for x in t[0])
doubleHex = Word(hexnums, exact=2).setParseAction(lambda t: int(t[0], 16))
hexLiteral = (Literal("#").setParseAction(lambda t: "RGB") +
(
Group(doubleHex + doubleHex + doubleHex) |
Word(hexnums, exact=3).setParseAction(parseShortHex)
) + StringEnd()
)
def parseNamedColour(t):
try:
return ["RGB", NamedColours[t[0].lower()]]
except KeyError:
return ["RGB", (0,0,0)]
namedColour = Word(alphas).setParseAction(parseNamedColour)
colourValue = rgb | hexLiteral | namedColour
##constants
NamedColours = {
#~ #html named colours
#~ "black":(0,0,0),
#~ "silver": (0xc0, 0xc0, 0xc0, 255),
#~ "gray": (0x80, 0x80, 0x80),
#~ "white":(255,255,255),
#~ "maroon":(0x80, 0, 0),
#~ "red":(0xff, 0, 0),
#~ "purple":(0x80, 0, 0x80),
#~ "fuchsia":(0xff, 0, 0xff),
#~ "green": (0, 0x80, 0),
#~ "lime": (0, 0xff, 0),
#~ "olive": (0x80, 0x80, 00),
#~ "yellow":(0xff, 0xff, 00),
#~ "navy": (0, 0, 0x80),
#~ "blue": (0, 0, 0xff),
#~ "teal": (0, 0x80, 0x80),
#~ "aqua": (0, 0xff, 0xff),
#expanded named colors from SVG spc
'aliceblue' : (240, 248, 255) ,
'antiquewhite' : (250, 235, 215) ,
'aqua' : ( 0, 255, 255) ,
'aquamarine' : (127, 255, 212) ,
'azure' : (240, 255, 255) ,
'beige' : (245, 245, 220) ,
'bisque' : (255, 228, 196) ,
'black' : ( 0, 0, 0) ,
'blanchedalmond' : (255, 235, 205) ,
'blue' : ( 0, 0, 255) ,
'blueviolet' : (138, 43, 226) ,
'brown' : (165, 42, 42) ,
'burlywood' : (222, 184, 135) ,
'cadetblue' : ( 95, 158, 160) ,
'chartreuse' : (127, 255, 0) ,
'chocolate' : (210, 105, 30) ,
'coral' : (255, 127, 80) ,
'cornflowerblue' : (100, 149, 237) ,
'cornsilk' : (255, 248, 220) ,
'crimson' : (220, 20, 60) ,
'cyan' : ( 0, 255, 255) ,
'darkblue' : ( 0, 0, 139) ,
'darkcyan' : ( 0, 139, 139) ,
'darkgoldenrod' : (184, 134, 11) ,
'darkgray' : (169, 169, 169) ,
'darkgreen' : ( 0, 100, 0) ,
'darkgrey' : (169, 169, 169) ,
'darkkhaki' : (189, 183, 107) ,
'darkmagenta' : (139, 0, 139) ,
'darkolivegreen' : ( 85, 107, 47) ,
'darkorange' : (255, 140, 0) ,
'darkorchid' : (153, 50, 204) ,
'darkred' : (139, 0, 0) ,
'darksalmon' : (233, 150, 122) ,
'darkseagreen' : (143, 188, 143) ,
'darkslateblue' : ( 72, 61, 139) ,
'darkslategray' : ( 47, 79, 79) ,
'darkslategrey' : ( 47, 79, 79) ,
'darkturquoise' : ( 0, 206, 209) ,
'darkviolet' : (148, 0, 211) ,
'deeppink' : (255, 20, 147) ,
'deepskyblue' : ( 0, 191, 255) ,
'dimgray' : (105, 105, 105) ,
'dimgrey' : (105, 105, 105) ,
'dodgerblue' : ( 30, 144, 255) ,
'firebrick' : (178, 34, 34) ,
'floralwhite' : (255, 250, 240) ,
'forestgreen' : ( 34, 139, 34) ,
'fuchsia' : (255, 0, 255) ,
'gainsboro' : (220, 220, 220) ,
'ghostwhite' : (248, 248, 255) ,
'gold' : (255, 215, 0) ,
'goldenrod' : (218, 165, 32) ,
'gray' : (128, 128, 128) ,
'grey' : (128, 128, 128) ,
'green' : ( 0, 128, 0) ,
'greenyellow' : (173, 255, 47) ,
'honeydew' : (240, 255, 240) ,
'hotpink' : (255, 105, 180) ,
'indianred' : (205, 92, 92) ,
'indigo' : ( 75, 0, 130) ,
'ivory' : (255, 255, 240) ,
'khaki' : (240, 230, 140) ,
'lavender' : (230, 230, 250) ,
'lavenderblush' : (255, 240, 245) ,
'lawngreen' : (124, 252, 0) ,
'lemonchiffon' : (255, 250, 205) ,
'lightblue' : (173, 216, 230) ,
'lightcoral' : (240, 128, 128) ,
'lightcyan' : (224, 255, 255) ,
'lightgoldenrodyellow' : (250, 250, 210) ,
'lightgray' : (211, 211, 211) ,
'lightgreen' : (144, 238, 144) ,
'lightgrey' : (211, 211, 211) ,
'lightpink' : (255, 182, 193) ,
'lightsalmon' : (255, 160, 122) ,
'lightseagreen' : ( 32, 178, 170) ,
'lightskyblue' : (135, 206, 250) ,
'lightslategray' : (119, 136, 153) ,
'lightslategrey' : (119, 136, 153) ,
'lightsteelblue' : (176, 196, 222) ,
'lightyellow' : (255, 255, 224) ,
'lime' : ( 0, 255, 0) ,
'limegreen' : ( 50, 205, 50) ,
'linen' : (250, 240, 230) ,
'magenta' : (255, 0, 255) ,
'maroon' : (128, 0, 0) ,
'mediumaquamarine' : (102, 205, 170) ,
'mediumblue' : ( 0, 0, 205) ,
'mediumorchid' : (186, 85, 211) ,
'mediumpurple' : (147, 112, 219) ,
'mediumseagreen' : ( 60, 179, 113) ,
'mediumslateblue' : (123, 104, 238) ,
'mediumspringgreen' : ( 0, 250, 154) ,
'mediumturquoise' : ( 72, 209, 204) ,
'mediumvioletred' : (199, 21, 133) ,
'midnightblue' : ( 25, 25, 112) ,
'mintcream' : (245, 255, 250) ,
'mistyrose' : (255, 228, 225) ,
'moccasin' : (255, 228, 181) ,
'navajowhite' : (255, 222, 173) ,
'navy' : ( 0, 0, 128) ,
'oldlace' : (253, 245, 230) ,
'olive' : (128, 128, 0) ,
'olivedrab' : (107, 142, 35) ,
'orange' : (255, 165, 0) ,
'orangered' : (255, 69, 0) ,
'orchid' : (218, 112, 214) ,
'palegoldenrod' : (238, 232, 170) ,
'palegreen' : (152, 251, 152) ,
'paleturquoise' : (175, 238, 238) ,
'palevioletred' : (219, 112, 147) ,
'papayawhip' : (255, 239, 213) ,
'peachpuff' : (255, 218, 185) ,
'peru' : (205, 133, 63) ,
'pink' : (255, 192, 203) ,
'plum' : (221, 160, 221) ,
'powderblue' : (176, 224, 230) ,
'purple' : (128, 0, 128) ,
'red' : (255, 0, 0) ,
'rosybrown' : (188, 143, 143) ,
'royalblue' : ( 65, 105, 225) ,
'saddlebrown' : (139, 69, 19) ,
'salmon' : (250, 128, 114) ,
'sandybrown' : (244, 164, 96) ,
'seagreen' : ( 46, 139, 87) ,
'seashell' : (255, 245, 238) ,
'sienna' : (160, 82, 45) ,
'silver' : (192, 192, 192) ,
'skyblue' : (135, 206, 235) ,
'slateblue' : (106, 90, 205) ,
'slategray' : (112, 128, 144) ,
'slategrey' : (112, 128, 144) ,
'snow' : (255, 250, 250) ,
'springgreen' : ( 0, 255, 127) ,
'steelblue' : ( 70, 130, 180) ,
'tan' : (210, 180, 140) ,
'teal' : ( 0, 128, 128) ,
'thistle' : (216, 191, 216) ,
'tomato' : (255, 99, 71) ,
'turquoise' : ( 64, 224, 208) ,
'violet' : (238, 130, 238) ,
'wheat' : (245, 222, 179) ,
'white' : (255, 255, 255) ,
'whitesmoke' : (245, 245, 245) ,
'yellow' : (255, 255, 0) ,
'yellowgreen' : (154, 205, 50) ,
}
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