Module:Math-colors
Jump to navigation
Jump to search
Documentation for this module may be created at Module:Math-colors/doc
-- <nowiki> local p = {} local getArgs = require("Module:Arguments").getArgs local userError = require("Module:User error") -- @TODO: replace this with a real color module some day local function isValidRgbColor(str) local channels = mw.text.split(str, "%s*,%s*") if #channels ~= 3 then return false end for i = 1, #channels do local channel = tonumber(channels[i]) if not channel or (channel % 1 ~= 0) or (channel < 0) or (channel > 255) then return false end end return true end --% Describe the following function here. --@ args (table) --@ args.expression (string) --@ [args.textColor] (string) defaults to "0,0,0" --: (str) function p.render(args) local expression = args.expression local color = args.textColor or "0,0,0" local frame = mw.getCurrentFrame() if not expression then error("missing expression", 0) end if not isValidRgbColor(color) then error("invalid text color (must be in the format <code>[red],[green],[blue]</code>, where each is a whole number from 0 through 255)", 0) end local html = mw.html.create(nil) :tag("span") :addClass("hidden") :css("display", "inline") :wikitext(frame:preprocess( "<math>\\color[RGB]{" .. color .. "}" .. expression .. "</math>" )) :done() :tag("span") :css("display", "none") :wikitext(frame:preprocess("<math>" .. expression .. "</math>")) :done() return tostring(html) end --% Describe the following function here. --@ frame (table) The --- [[Lua reference manual/Scribunto libraries#Frame object|frame object]] --: (str) function p.main(frame) local args = getArgs(frame) local success, response = pcall(p.render, args) return success and response or userError(response) end return p -- </nowiki>