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const svgSprite = require("svg-sprite")
const { optimize } = require("svgo")
const { JSDOM } = require("jsdom")
// Generate <view>'s for referencing sprites in css
function generateAtlasViews(svgFile, symbolId) {
const dom = new JSDOM(svgFile)
const document = dom.window.document
const svg = document.querySelector("svg")
const symbols = document.querySelectorAll("symbol")
const width = 24
const height = 24
let row = 0
let col = 0
const totalCols = Math.floor(Math.sqrt(symbols.length))
for (const symbol of symbols) {
const x = col * width
const y = row * height
let id = symbol.getAttribute("id")
symbol.removeAttribute("xmlns")
if (symbolId) {
id = symbolId(id)
symbol.setAttribute("id", id)
}
// Create elements
const svgView = document.createElement("view")
svgView.setAttribute("id", `${id}-view`)
svgView.setAttribute("viewBox", `${x} ${y} ${width} ${height}`)
const svgUse = document.createElement("use")
svgUse.setAttribute("width", width)
svgUse.setAttribute("height", height)
//svgUse.setAttribute("viewBox", "0 -960 960 960")
svgUse.setAttribute("x", x)
svgUse.setAttribute("y", y)
svgUse.setAttribute("href", `#${id}`)
// Append elements
svg.appendChild(svgView)
svg.appendChild(svgUse)
// Adjust row/col
col++
if (col > totalCols) {
col = 0
row++
}
}
const cWidth = (totalCols + 1) * width
const cHeight = (row + 1) * height
svg.setAttribute("viewBox", `0 0 ${cWidth} ${cHeight}`)
svg.setAttribute("width", `${cWidth}px`)
svg.setAttribute("height", `${cHeight}px`)
const svgStr = svg.outerHTML.replaceAll("viewbox", "viewBox") // JSDOM will lower-case all attributes
return optimize(svgStr, {
multipass: true,
plugins: [{ name: "removeUnknownsAndDefaults", active: false }], // Prevent changing of ids
}).data
}
async function generateAtlasViewsFromReferences(refs, symbolId) {
const spriter = new svgSprite({ mode: { symbol: { dest: "", sprite: "icons.svg" } } })
// Add refs to spriter
for (const ref of refs) {
const name = (ref.name ?? ref.symbol ?? ref.path.replace(".svg", "")) + ".svg" // Supposed to pass a file path, make a fake one
spriter.add(name, null, ref.svg)
}
// Compile and return atlas
const { result } = await spriter.compileAsync()
return generateAtlasViews(result.symbol.sprite.contents.toString(), symbolId)
}
module.exports = { generateAtlasViews, generateAtlasViewsFromReferences }
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