1 files changed, 78 insertions, 0 deletions
diff --git a/utils.js b/utils.js
new file mode 100644
index 0000000..0e372ae
--- /dev/null
+++ b/utils.js
@@ -0,0 +1,78 @@
+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 }