Module:Color contrast: Difference between revisions
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rudimentary CSS parser |
Sigh. I should read the code sometimes, however ugly it may be. |
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Line 202: | Line 202: | ||
local args = frame.args[1] and frame.args or frame:getParent().args |
local args = frame.args[1] and frame.args or frame:getParent().args |
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return p._greatercontrast(args) |
return p._greatercontrast(args) |
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end |
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-- warning: crude! may be fooled by sufficientry tricky CSS |
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function p.extract_css_colors(css, e) |
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local fgcolor, bgcolor |
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css = css:gsub("/%*.-%*/", "") |
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for name, value in string.gmatch(css, "([a-z-]*)%s*:%s*([^;]*)") do |
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value = mw.text.trim(value) |
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if name == 'color' then |
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fgcolor = value |
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elseif name == 'background-color' then |
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bgcolor = value |
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elseif name == 'background' then |
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value = value:gsub("url%((['\"]?).-%1%)", "") |
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bgcolor = value:match("#[0-9A-Fa-f]*") or value:match("rgba?%([0-9.%, ]*%)") or value:match("hsla?%([0-9.%, ]*%)") |
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if not bgcolor then |
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value = value:gsub("[0-9.][0-9.]*[%%a-z][a-z]?[a-z]?", "") |
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value = value:gsub("auto", ""):gsub("cover", ""):gsub("contain", "") |
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value = value:gsub("scroll", ""):gsub("fixed", ""):gsub("local", "") |
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value = value:gsub("left", ""):gsub("right", ""):gsub("top", ""):gsub("bottom", ""):gsub("center", "") |
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value = value:gsub("no%-repeat", ""):gsub("repeat", ""):gsub("repeat%-[xy]", ""):gsub("space", ""):gsub("round", "") |
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value = value:gsub("border%-box", ""):gsub("padding%-box", ""):gsub("content%-box", "") |
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bgcolor = mw.text.trim(value) |
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end |
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end |
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end |
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return fgcolor, bgcolor |
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end |
end |
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