Module:Chart

--	keywords are used for languages: they are the names of the actual	parameters of the template

local keywords = { barChart = 'bar chart', pieChart = 'pie chart', width = 'width', height = 'height', stack = 'stack', colors = 'colors', group = 'group', xlegend = 'x legends', yticks = 'y tick marks', tooltip = 'tooltip', accumulateTooltip = 'tooltip value accumulation', links = 'links', defcolor = 'default color', scalePerGroup = 'scale per group', unitsPrefix = 'units prefix', unitsSuffix = 'units suffix', groupNames = 'group names', hideGroupLegends = 'hide group legends', slices = 'slices', slice = 'slice', radius = 'radius', percent = 'percent',

} -- here is what you want to translate

local defColors = mw.loadData("Module:Chart/Default colors") local hideGroupLegends

local function nulOrWhitespace( s ) return not s or mw.text.trim( s ) == '' end

local function createGroupList( tab, legends, cols ) if #legends > 1 and not hideGroupLegends then table.insert( tab, mw.text.tag( 'div' ) ) local list = {} local spanStyle = "padding:0 1em;background-color:%s;border:1px solid %s;margin-right:1em;-webkit-print-color-adjust:exact;" for gi = 1, #legends do local span = mw.text.tag( 'span', { style = string.format( spanStyle, cols[gi], cols[gi] ) }, ' ' ) .. ' '.. legends[gi] table.insert( list, mw.text.tag( 'li', {}, span ) ) end table.insert( tab,			mw.text.tag( 'ul', {style="list-style:none;column-width:12em;"}, table.concat( list, '\n' ) )		)		table.insert( tab, ' ' ) end end

local function pieChart( frame ) local res, imslices, args = {}, {}, frame.args local radius local values, colors, names, legends, links = {}, {}, {}, {}, {} local delimiter = args.delimiter or ':' local lang = mw.getContentLanguage

local function getArg( s, def, subst, with ) local result = args[keywords[s]] or def or '' if subst and with then result = string.gsub( result, subst, with ) end return result end

local function analyzeParams local function addSlice( i, slice ) local value, name, color, link = unpack( mw.text.split( slice, '%s*' .. delimiter .. '%s*' ) ) values[i] = tonumber( lang:parseFormattedNumber( value ) ) or error( string.format( 'Slice %d: "%s", first item("%s") could not be parsed as a number', i, value or '', slice ) ) colors[i] = not nulOrWhitespace( color ) and color or defColors[i * 2] names[i] = name or '' links[i] = link end

radius = getArg( 'radius', 150 ) hideGroupLegends = not nulOrWhitespace( args[keywords.hideGroupLegends] ) local slicesStr = getArg( 'slices' ) local prefix = getArg( 'unitsPrefix', '', '_', ' ' ) local suffix = getArg( 'unitsSuffix', '', '_', ' ' ) local percent = args[keywords.percent] local sum = 0 local i = 0 for slice in string.gmatch( slicesStr or '', "%b" ) do			i = i + 1 addSlice( i, string.match( slice, '^%(%s*(.-)%s*%)$' ) ) end

for k, v in pairs(args) do local ind = string.match( k, '^' .. keywords.slice .. '%s+(%d+)$' ) if ind then addSlice( tonumber( ind ), v ) end end

for _, val in ipairs( values ) do sum = sum + val end for i, value in ipairs( values ) do			local addprec = percent and string.format( ' (%0.1f%%)', value / sum * 100 ) or '' legends[i] = string.format( '%s: %s%s%s%s', names[i], prefix, lang:formatNum( value ), suffix, addprec ) links[i] = mw.text.trim( links[i] or string.format( '%s', legends[i] ) ) end end

local function addRes( ... ) for _, v in pairs( { ... } ) do			table.insert( res, v ) end end

local function createImageMap addRes( '' ) end

local function drawSlice( i, q, start ) local color = colors[i] local angle = start * 2 * math.pi		local sin, cos = math.abs( math.sin( angle ) ), math.abs( math.cos( angle ) ) local wsin, wcos = sin * radius, cos * radius local s1, s2, w1, w2, w3, w4, border if q == 1 then border = 'left' w1, w2, w3, w4 = 0, 0, wsin, wcos s1, s2 = 'bottom', 'left' elseif q == 2 then border = 'bottom' w1, w2, w3, w4 = 0, wcos, wsin, 0 s1, s2 = 'bottom', 'right' elseif q == 3 then border = 'right' w1, w2, w3, w4 = wsin, wcos, 0, 0 s1, s2 = 'top', 'right' else border = 'top' w1, w2, w3, w4 = wsin, 0, 0, wcos s1, s2 = 'top', 'left' end

local style = string.format( 'border:solid transparent;position:absolute;%s:%spx;%s:%spx;width:%spx;height:%spx', s1, radius, s2, radius, radius, radius ) if start <= ( q - 1 ) * 0.25 then style = string.format( '%s;border:0;background-color:%s', style, color ) else style = string.format( '%s;border-width:%spx %spx %spx %spx;border-%s-color:%s', style, w1, w2, w3, w4, border, color ) end addRes( mw.text.tag( 'div', { style = style }, '' ) ) end

local function createSlices local function coordsOfAngle( angle ) return ( 100 + math.floor( 100 * math.cos( angle ) ) ) .. ' ' .. ( 100 - math.floor( 100 * math.sin( angle ) ) ) end

local sum, start = 0, 0 for _, value in ipairs( values ) do sum = sum + value end for i, value in ipairs(values) do			local poly = { 'poly 100 100' } local startC, endC = start / sum, ( start + value ) / sum local startQ, endQ = math.floor( startC * 4 + 1 ), math.floor( endC * 4 + 1 ) for q = startQ, math.min( endQ, 4 ) do drawSlice( i, q, startC ) end for angle = startC * 2 * math.pi, endC * 2 * math.pi, 0.02 do				table.insert( poly, coordsOfAngle( angle ) ) end table.insert( poly, coordsOfAngle( endC * 2 * math.pi ) .. ' 100 100 ' .. links[i] ) table.insert( imslices, table.concat( poly, ' ' ) ) start = start + values[i] end end

analyzeParams if #values == 0 then error( "no slices found - can't draw pie chart" ) end addRes( mw.text.tag( 'div', { class = 'chart noresize', style = string.format( 'margin-top:0.5em;max-width:%spx;', radius * 2 ) } ) ) addRes( mw.text.tag( 'div', { style = string.format( 'position:relative;min-width:%spx;min-height:%spx;max-width:%spx;overflow:hidden;', radius * 2, radius * 2, radius * 2 ) } ) ) createSlices addRes( mw.text.tag( 'div', { style = string.format( 'position:absolute;min-width:%spx;min-height:%spx;overflow:hidden;', radius * 2, radius * 2 ) } ) ) createImageMap addRes( ' ' ) -- close "position:relative" div that contains slices and imagemap. addRes( ' ' ) -- close "position:relative" div that contains slices and imagemap. createGroupList( res, legends, colors ) -- legends addRes( ' ' ) -- close containing div return frame:preprocess( table.concat( res, '\n' ) ) end

local function barChart( frame ) local res = {} local args = frame.args -- can be changed to frame:getParent.args local values, xlegends, colors, tooltips, yscales = {}, {}, {}, {}, {} local groupNames, unitsSuffix, unitsPrefix, links = {}, {}, {}, {} local width, height, yticks, stack, delimiter = 500, 350, -1, false, args.delimiter or ':' local chartWidth, chartHeight, defcolor, scalePerGroup, accumulateTooltip

local numGroups, numValues local scaleWidth

local function validate local function asGroups( name, tab, toDuplicate, emptyOK ) if #tab == 0 and not emptyOK then error( "must supply values for " .. keywords[name] ) end if #tab == 1 and toDuplicate then for i = 2, numGroups do tab[i] = tab[1] end end if #tab > 0 and #tab ~= numGroups then error ( keywords[name] .. ' must contain the same number of items as the number of groups, but it contains ' .. #tab .. ' items and there are ' .. numGroups .. ' groups') end end

-- do all sorts of validation here, so we can assume all params are good from now on. -- among other things, replace numerical values with mw.language:parseFormattedNumber result

chartHeight = height - 80 numGroups = #values numValues = #values[1] defcolor = defcolor or 'blue' colors[1] = colors[1] or defcolor scaleWidth = scalePerGroup and 80 * numGroups or 100 chartWidth = width - scaleWidth asGroups( 'unitsPrefix', unitsPrefix, true, true ) asGroups( 'unitsSuffix', unitsSuffix, true, true ) asGroups( 'colors', colors, true, true ) asGroups( 'groupNames', groupNames, false, false ) if stack and scalePerGroup then error( string.format( 'Illegal settings: %s and %s are incompatible.', keywords.stack, keywords.scalePerGroup ) ) end for gi = 2, numGroups do if #values[gi] ~= numValues then error( keywords.group .. " " .. gi .. " does not have same number of values as " .. keywords.group .. " 1" ) end end if #xlegends ~= numValues then error( 'Illegal number of ' .. keywords.xlegend .. '. Should be exactly ' .. numValues ) end end

local function extractParams local function testone( keyword, key, val, tab ) local i = keyword == key and 0 or key:match( keyword .. "%s+(%d+)" ) if not i then return end i = tonumber( i ) or error("Expect numerical index for key " .. keyword .. " instead of '" .. key .. "'") if i > 0 then tab[i] = {} end for s in mw.text.gsplit( val, '%s*' .. delimiter .. '%s*' ) do				table.insert( i == 0 and tab or tab[i], s ) end return true end

for k, v in pairs( args ) do			if k == keywords.width then width = tonumber( v ) if not width or width < 200 then error( 'Illegal width value (must be a number, and at least 200): ' .. v ) end elseif k == keywords.height then height = tonumber( v ) if not height or height < 200 then error( 'Illegal height value (must be a number, and at least 200): ' .. v ) end elseif k == keywords.stack then stack = true elseif k == keywords.yticks then yticks = tonumber(v) or -1 elseif k == keywords.scalePerGroup then scalePerGroup = true elseif k == keywords.defcolor then defcolor = v			elseif k == keywords.accumulateTooltip then accumulateTooltip = not nulOrWhitespace( v ) elseif k == keywords.hideGroupLegends then hideGroupLegends = not nulOrWhitespace( v ) else for keyword, tab in pairs( {					group = values,					xlegend = xlegends,					colors = colors,					tooltip = tooltips,					unitsPrefix = unitsPrefix,					unitsSuffix = unitsSuffix,					groupNames = groupNames,					links = links,					} ) do						if testone( keywords[keyword], k, v, tab ) then break end end end end end

local function roundup( x ) -- returns the next round number: eg., for 30 to 39.999 will return 40, for 3000 to 3999.99 wil return 4000. for 10 - 14.999 will return 15. local ordermag = 10 ^ math.floor( math.log10( x ) ) local normalized = x / ordermag local top = normalized >= 1.5 and ( math.floor( normalized + 1 ) ) or 1.5 return ordermag * top, top, ordermag end

local function calcHeightLimits -- if limits were passed by user, use them, otherwise calculate. for "stack" there's only one limet. if stack then local sums = {} for _, group in pairs( values ) do				for i, val in ipairs( group ) do sums[i] = ( sums[i] or 0 ) + val end end local sum = math.max( unpack( sums ) ) for i = 1, #values do yscales[i] = sum end else for i, group in ipairs( values ) do yscales[i] = math.max( unpack( group ) ) end end for i, scale in ipairs( yscales ) do yscales[i] = roundup( scale * 0.9999 ) end if not scalePerGroup then for i = 1, #values do yscales[i] = math.max( unpack( yscales ) ) end end end

local function tooltip( gi, i, val ) if tooltips and tooltips[gi] and not nulOrWhitespace( tooltips[gi][i] ) then return tooltips[gi][i], true end local groupName = mw.text.killMarkers(not nulOrWhitespace( groupNames[gi] ) and groupNames[gi] .. ': ' or '') local prefix = unitsPrefix[gi] or unitsPrefix[1] or '' local suffix = unitsSuffix[gi] or unitsSuffix[1] or '' return string.gsub(groupName .. prefix .. mw.getContentLanguage:formatNum( tonumber( val ) or 0 ) .. suffix, '_', ' '), false end

local function calcHeights( gi, i, val ) local barHeight = math.max( 2, math.floor( val / yscales[gi] * chartHeight + 0.5 ) ) -- add half to make it "round" instead of "trunc", min height to 2 to avoid negative bar sizes local top, base = chartHeight - barHeight, 0 if stack then for j = 1, gi - 1 do				if tonumber(values[j][i]) > 0 then base = base + math.max( 2, math.floor( values[j][i] / yscales[gi] * chartHeight + 0.5 ) ) -- sum the "i" value of all the groups below our group, gi, and keep the same calculation for each bar end end end return barHeight, top - base end

local function groupBounds( i ) local setWidth = math.floor( chartWidth / numValues ) local setOffset = ( i - 1 ) * setWidth return setOffset, setWidth end

local function calcx( gi, i ) local setOffset, setWidth = groupBounds( i ) if stack or numGroups == 1 then local barWidth = math.min( 38, math.floor( 0.8 * setWidth ) ) return setOffset + (setWidth - barWidth) / 2, barWidth end setWidth = 0.85 * setWidth local barWidth = math.floor( 0.75 * setWidth / numGroups ) local left = setOffset + math.floor( ( gi - 1 ) / numGroups * setWidth ) return left, barWidth end

local function drawbar( gi, i, val, ttval ) if val == '0' then return end -- do not show single line (borders....) if value is 0, or rather, '0'. see talkpage

local color, tooltip, custom = colors[gi] or defcolor or 'blue', tooltip( gi, i, ttval or val ) local left, barWidth = calcx( gi, i ) local barHeight, top = calcHeights( gi, i, val )

-- borders so it shows up when printing local style = string.format("position:absolute;left:%spx;top:%spx;height:%spx;min-width:%spx;max-width:%spx;background-color:%s;-webkit-print-color-adjust:exact;border:1px solid %s;border-bottom:none;overflow:hidden;",						left, top, barHeight-1, barWidth-2, barWidth-2, color, color) local link = links[gi] and links[gi][i] or '' local img = not nulOrWhitespace( link ) and string.format( , link, custom and tooltip or  ) or '' table.insert( res, mw.text.tag( 'div', { style = style, title = tooltip, }, img ) ) end

local function drawYScale local function drawSingle( gi, color, width, yticks, single ) local yscale = yscales[gi] local _, top, ordermag = roundup( yscale * 0.999 ) local numnotches = yticks >= 0 and yticks or					(top <= 1.5 and top * 4					or top < 4 and top * 2					or top) local valStyleStr = single and 'position:absolute;height=20px;text-align:right;vertical-align:middle;width:%spx;top:%spx;padding:0 2px' or 'position:absolute;height=20px;text-align:right;vertical-align:middle;width:%spx;top:%spx;left:3px;background-color:%s;color:white;font-weight:bold;text-shadow:-1px -1px 0 #000,1px -1px 0 #000,-1px 1px 0 #000,1px 1px 0 #000;padding:0 2px' local notchStyleStr = 'position:absolute;height=1px;min-width:5px;top:%spx;left:%spx;border:1px solid %s;' for i = 1, numnotches do				local val = i / numnotches * yscale local y = chartHeight - calcHeights( gi, 1, val ) local div = mw.text.tag( 'div', { style = string.format( valStyleStr, width - 10, y - 10, color ) }, mw.getContentLanguage:formatNum( tonumber( val ) or 0 ) ) table.insert( res, div ) div = mw.text.tag( 'div', { style = string.format( notchStyleStr, y, width - 4, color ) }, '' ) table.insert( res, div ) end end

if scalePerGroup then local colWidth = 80 local colStyle = "position:absolute;height:%spx;min-width:%spx;left:%spx;border-right:1px solid %s;color:%s" for gi = 1, numGroups do				local left = ( gi - 1 ) * colWidth local color = colors[gi] or defcolor table.insert( res, mw.text.tag( 'div', { style = string.format( colStyle, chartHeight, colWidth, left, color, color ) } ) ) drawSingle( gi, color, colWidth, yticks ) table.insert( res, ' ' ) end else drawSingle( 1, 'black', scaleWidth, yticks, true ) end end

local function drawXlegends local setOffset, setWidth local legendDivStyleFormat = "position:absolute;left:%spx;top:10px;min-width:%spx;max-width:%spx;text-align:center;vertical-align:top;" local tickDivstyleFormat = "position:absolute;left:%spx;height:10px;width:1px;border-left:1px solid black;" for i = 1, numValues do			if not nulOrWhitespace( xlegends[i] ) then setOffset, setWidth = groupBounds( i ) -- setWidth = 0.85 * setWidth table.insert( res, mw.text.tag( 'div', { style = string.format( legendDivStyleFormat, setOffset + 1, setWidth - 2, setWidth - 2 ) }, xlegends[i] or '' ) ) table.insert( res, mw.text.tag( 'div', { style = string.format( tickDivstyleFormat, setOffset + setWidth / 2 ) }, '' ) ) end end end

local function drawChart table.insert( res, mw.text.tag( 'div', { class = 'chart noresize', style = string.format( 'padding-top:10px;margin-top:1em;max-width:%spx;', width ) } ) ) table.insert( res, mw.text.tag( 'div', { style = string.format("position:relative;min-height:%spx;min-width:%spx;max-width:%spx;", height, width, width ) } ) )

table.insert( res, mw.text.tag( 'div', { style = string.format("float:right;position:relative;min-height:%spx;min-width:%spx;max-width:%spx;border-left:1px black solid;border-bottom:1px black solid;", chartHeight, chartWidth, chartWidth ) } ) ) local acum = stack and accumulateTooltip and {} for gi, group in pairs( values ) do			for i, val in ipairs( group ) do				if acum then acum[i] = ( acum[i] or 0 ) + val end drawbar( gi, i, val, acum and acum[i] ) end end table.insert( res, ' ' ) table.insert( res, mw.text.tag( 'div', { style = string.format("position:absolute;height:%spx;min-width:%spx;max-width:%spx;", chartHeight, scaleWidth, scaleWidth, scaleWidth ) } ) ) drawYScale table.insert( res, ' ' ) table.insert( res, mw.text.tag( 'div', { style = string.format( "position:absolute;top:%spx;left:%spx;width:%spx;", chartHeight, scaleWidth, chartWidth ) } ) ) drawXlegends table.insert( res, ' ' ) table.insert( res, ' ' ) createGroupList( res, groupNames, colors ) table.insert( res, ' ' ) end

extractParams validate calcHeightLimits drawChart return table.concat( res, "\n" ) end

return { ['bar-chart'] = barChart, [keywords.barChart] = barChart, [keywords.pieChart] = pieChart, }