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const fs = require("fs")
const path = require("path")
//const svgSprite = require("svg-sprite")
const { JSDOM } = require("jsdom")
//const { optimize } = require("svgo")
const { RawSource } = require("webpack-sources")
// Generate <view>'s for referencing sprites in css
function generateAtlasViews(svgFile) {
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
const id = symbol.getAttribute("id")
// Create elements
const view = document.createElement("view")
view.setAttribute("id", `${id}-view`)
view.setAttribute("viewBox", `0 0 ${x} ${y}`)
const svgSprite = document.createElement("svg")
svgSprite.setAttribute("width", width)
svgSprite.setAttribute("height", height)
svgSprite.setAttribute("viewBox", "0 -960 960 960")
svgSprite.setAttribute("x", x)
svgSprite.setAttribute("y", y)
const svgUse = document.createElement("use")
svgUse.setAttribute("href", `#${id}`)
// Append elements
svgSprite.appendChild(svgUse)
svg.appendChild(view)
svg.appendChild(svgSprite)
// Adjust row/col
col++
if (col > totalCols) {
col = 0
row++
}
}
svg.setAttribute("viewBox", `0 0 ${(totalCols+1)*width} ${(row+1)*height}`)
return svg.outerHTML
}
class SVGSymbolAtlasViewPlugin {
constructor(options = {}) {
this.suffix = options.suffix || ".svg"
}
apply(compiler) {
compiler.hooks.thisCompilation.tap("SVGSymbolAtlasViewPlugin", (compilation) => {
compilation.hooks.processAssets.tap(
{
name: "SVGSymbolAtlasViewPlugin",
stage: compiler.webpack.Compilation.PROCESS_ASSETS_STAGE_OPTIMIZE,
},
(assets) => {
for (const assetName in assets) {
if (assetName.endsWith(this.suffix)) {
const originalSVG = assets[assetName].source().toString()
const atlasSVG = generateAtlasViews(originalSVG)
// Replace old SVG asset with new SVG
compilation.updateAsset(assetName, new RawSource(atlasSVG))
}
}
}
)
})
}
}
module.exports = SVGSymbolAtlasViewPlugin
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