local p = {}
local m = require "Mô đun:Math"
-- Từ mã nguồn [[:Tập tin:Linear visible spectrum.svg]].
p.visibleSpectrum = {
[380] = {offset = 0.000000, red = 0x02, green = 0x00, blue = 0x05},
[385] = {offset = 0.013514, red = 0x02, green = 0x00, blue = 0x06},
[390] = {offset = 0.027027, red = 0x03, green = 0x00, blue = 0x08},
[395] = {offset = 0.040541, red = 0x04, green = 0x00, blue = 0x0A},
[400] = {offset = 0.054054, red = 0x06, green = 0x00, blue = 0x0D},
[405] = {offset = 0.067568, red = 0x08, green = 0x01, blue = 0x10},
[410] = {offset = 0.081081, red = 0x0C, green = 0x01, blue = 0x17},
[415] = {offset = 0.094595, red = 0x11, green = 0x02, blue = 0x1F},
[420] = {offset = 0.108108, red = 0x17, green = 0x03, blue = 0x2A},
[425] = {offset = 0.121622, red = 0x1F, green = 0x05, blue = 0x3A},
[430] = {offset = 0.135135, red = 0x25, green = 0x08, blue = 0x4B},
[435] = {offset = 0.148649, red = 0x29, green = 0x0A, blue = 0x5C},
[440] = {offset = 0.162162, red = 0x2B, green = 0x0E, blue = 0x6F},
[445] = {offset = 0.175676, red = 0x29, green = 0x13, blue = 0x80},
[450] = {offset = 0.189189, red = 0x1F, green = 0x23, blue = 0x7B},
[455] = {offset = 0.202703, red = 0x13, green = 0x2E, blue = 0x74},
[460] = {offset = 0.216216, red = 0x09, green = 0x37, blue = 0x6C},
[465] = {offset = 0.229730, red = 0x0A, green = 0x3E, blue = 0x66},
[470] = {offset = 0.243243, red = 0x0C, green = 0x46, blue = 0x67},
[475] = {offset = 0.256757, red = 0x0E, green = 0x4F, blue = 0x6A},
[480] = {offset = 0.270270, red = 0x10, green = 0x59, blue = 0x6C},
[485] = {offset = 0.283784, red = 0x11, green = 0x63, blue = 0x6D},
[490] = {offset = 0.297297, red = 0x14, green = 0x6E, blue = 0x6F},
[495] = {offset = 0.310811, red = 0x17, green = 0x79, blue = 0x70},
[500] = {offset = 0.324324, red = 0x17, green = 0x86, blue = 0x72},
[505] = {offset = 0.337838, red = 0x1A, green = 0x95, blue = 0x74},
[510] = {offset = 0.351351, red = 0x1D, green = 0xA3, blue = 0x75},
[515] = {offset = 0.364865, red = 0x1D, green = 0xB2, blue = 0x73},
[520] = {offset = 0.378378, red = 0x20, green = 0xC0, blue = 0x70},
[525] = {offset = 0.391892, red = 0x22, green = 0xCB, blue = 0x6B},
[530] = {offset = 0.405405, red = 0x21, green = 0xD6, blue = 0x62},
[535] = {offset = 0.418919, red = 0x23, green = 0xE0, blue = 0x54},
[540] = {offset = 0.432432, red = 0x36, green = 0xE8, blue = 0x42},
[545] = {offset = 0.445946, red = 0x50, green = 0xED, blue = 0x28},
[550] = {offset = 0.459459, red = 0x73, green = 0xEB, blue = 0x22},
[555] = {offset = 0.472973, red = 0x8F, green = 0xE7, blue = 0x22},
[560] = {offset = 0.486486, red = 0xA5, green = 0xE2, blue = 0x21},
[565] = {offset = 0.500000, red = 0xB9, green = 0xDC, blue = 0x22},
[570] = {offset = 0.513514, red = 0xCB, green = 0xD6, blue = 0x21},
[575] = {offset = 0.527027, red = 0xDC, green = 0xCE, blue = 0x20},
[580] = {offset = 0.540541, red = 0xEC, green = 0xC4, blue = 0x20},
[585] = {offset = 0.554054, red = 0xF2, green = 0xB7, blue = 0x35},
[590] = {offset = 0.567568, red = 0xF5, green = 0xAB, blue = 0x42},
[595] = {offset = 0.581081, red = 0xF6, green = 0x9F, blue = 0x49},
[600] = {offset = 0.594595, red = 0xF7, green = 0x94, blue = 0x4B},
[605] = {offset = 0.608108, red = 0xF9, green = 0x88, blue = 0x48},
[610] = {offset = 0.621622, red = 0xFA, green = 0x7B, blue = 0x42},
[615] = {offset = 0.635135, red = 0xFB, green = 0x6C, blue = 0x39},
[620] = {offset = 0.648649, red = 0xFD, green = 0x5B, blue = 0x2E},
[625] = {offset = 0.662162, red = 0xFC, green = 0x47, blue = 0x1F},
[630] = {offset = 0.675676, red = 0xF7, green = 0x30, blue = 0x0F},
[635] = {offset = 0.689189, red = 0xEA, green = 0x22, blue = 0x0D},
[640] = {offset = 0.702703, red = 0xD4, green = 0x22, blue = 0x15},
[645] = {offset = 0.716216, red = 0xBF, green = 0x23, blue = 0x18},
[650] = {offset = 0.729730, red = 0xA9, green = 0x23, blue = 0x09},
[655] = {offset = 0.743243, red = 0x98, green = 0x1F, blue = 0x07},
[660] = {offset = 0.756757, red = 0x87, green = 0x1B, blue = 0x06},
[665] = {offset = 0.770270, red = 0x77, green = 0x18, blue = 0x05},
[670] = {offset = 0.783784, red = 0x67, green = 0x15, blue = 0x04},
[675] = {offset = 0.797297, red = 0x59, green = 0x13, blue = 0x03},
[680] = {offset = 0.810811, red = 0x4D, green = 0x11, blue = 0x03},
[685] = {offset = 0.824324, red = 0x42, green = 0x0E, blue = 0x02},
[690] = {offset = 0.837838, red = 0x37, green = 0x0C, blue = 0x01},
[695] = {offset = 0.851351, red = 0x2E, green = 0x0A, blue = 0x01},
[700] = {offset = 0.864865, red = 0x27, green = 0x08, blue = 0x01},
[705] = {offset = 0.878378, red = 0x21, green = 0x06, blue = 0x00},
[710] = {offset = 0.891892, red = 0x1E, green = 0x04, blue = 0x00},
[715] = {offset = 0.905405, red = 0x1A, green = 0x03, blue = 0x00},
[720] = {offset = 0.918919, red = 0x17, green = 0x02, blue = 0x00},
[725] = {offset = 0.932432, red = 0x13, green = 0x01, blue = 0x00},
[730] = {offset = 0.945946, red = 0x10, green = 0x01, blue = 0x00},
[735] = {offset = 0.959459, red = 0x0C, green = 0x01, blue = 0x00},
[740] = {offset = 0.972973, red = 0x08, green = 0x01, blue = 0x00},
[745] = {offset = 0.986486, red = 0x06, green = 0x01, blue = 0x00},
[750] = {offset = 1.000000, red = 0x04, green = 0x01, blue = 0x00},
}
p.cssGradientFormats = {
{"background: -moz-linear-gradient(left, %s);", "%s %i%%"}, -- Gecko 1.9.2+
{"background: -webkit-gradient(linear, left top, right top, %s);", stop = "color-stop(%i%%, %s)"}, -- Chrome, Safari 4+
{"background: -webkit-linear-gradient(left, %s);", "%s %i%%"}, -- Chrome 10+, Safari 5.1+
{"background: -o-linear-gradient(left, %s);", "%s %i%%"}, -- Presto 2.8+
{"background: -icab-linear-gradient(left, %s);", "%s %i%%"}, -- iCab?
{"background: -khtml-gradient(linear, left top, right top, %s);", stop = "color-stop(%i%%, %s)"}, -- KHTML?
{"background: -ms-linear-gradient(left, %s);", "%s %i%%"}, -- Trident 6.0+
{"background: linear-gradient(to right, %s);", "%s %i%%"}, -- CSS 3
}
function p.visibleSpectrumCSSGradient(frame)
local nmMin = m._roundNearest(frame.args[1] or 0, 5)
local nmMax = m._roundNearest(frame.args[2] or 0, 5)
local offsetMin = 0
for i = nmMin, nmMax, 5 do
local stop = p.visibleSpectrum[i]
if stop then
offsetMin = stop.offset
break
end
end
local offsetMax = 0
for i = nmMax, nmMin, -5 do
local stop = p.visibleSpectrum[i]
if stop then
offsetMax = stop.offset
break
end
end
local stops = {}
for i = nmMin, nmMax, 5 do
local stop = p.visibleSpectrum[i]
if stop then
table.insert(stops, {
offset = (stop.offset - offsetMin) * 100 / (offsetMax - offsetMin),
color = string.format("rgb(%i, %i, %i)",
stop.red, stop.green, stop.blue),
})
end
end
local props = {}
for i, format in ipairs(p.cssGradientFormats) do
local cssStops = {}
for j, stop in ipairs(stops) do
local cssStop
if format.stop then
cssStop = mw.ustring.format(format.stop, stop.offset, stop.color)
else
cssStop = mw.ustring.format(format[2], stop.color, stop.offset)
end
table.insert(cssStops, cssStop)
end
table.insert(props, mw.ustring.format(format[1], table.concat(cssStops, ", ")))
end
return table.concat(props, " ")
end
return p
