From bc55e975454bb03bde8973cea0abcc95bdb91153 Mon Sep 17 00:00:00 2001
From: Jon Bake <jonmbake@gmail.com>
Date: Sat, 18 Jun 2022 12:02:05 -0500
Subject: [PATCH] Fixes #681 - Add font awesome CSS to exported SVG

---
 src/lib/components/actions.svelte | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/src/lib/components/actions.svelte b/src/lib/components/actions.svelte
index 9f5f72bd..ed3d8cfd 100644
--- a/src/lib/components/actions.svelte
+++ b/src/lib/components/actions.svelte
@@ -14,7 +14,7 @@
 		svg?.setAttribute('height', `${height}px`);
 		svg?.setAttribute('width', `${width}px`); // Workaround https://stackoverflow.com/questions/28690643/firefox-error-rendering-an-svg-image-to-html5-canvas-with-drawimage
 		if (!svg) {
-			svg = document.querySelector('#container svg');
+			svg = getSvgEl();
 		}
 		const svgString = svg.outerHTML
 			.replaceAll('<br>', '<br/>')
@@ -24,7 +24,7 @@
 
 	const exportImage = (event: Event, exporter: Exporter) => {
 		const canvas: HTMLCanvasElement = document.createElement('canvas');
-		const svg: HTMLElement = document.querySelector('#container svg');
+		const svg: HTMLElement = getSvgEl();
 		const box: DOMRect = svg.getBoundingClientRect();
 		canvas.width = box.width;
 		canvas.height = box.height;
@@ -50,6 +50,22 @@
 		event.preventDefault();
 	};
 
+	const getSvgEl = () => {
+		const svgEl: HTMLElement = document
+			.querySelector('#container svg')
+			.cloneNode(true) as HTMLElement;
+		const fontAwesomeCdnUrl = Array.from(document.head.getElementsByTagName('link'))
+			.map((l) => l.href)
+			.find((h) => h && h.includes('font-awesome'));
+		if (fontAwesomeCdnUrl == null) {
+			return svgEl;
+		}
+		const styleEl = document.createElement('style');
+		styleEl.innerText = `@import url("${fontAwesomeCdnUrl}");'`;
+		svgEl.prepend(styleEl);
+		return svgEl;
+	};
+
 	const simulateDownload = (download: string, href: string): void => {
 		const a = document.createElement('a');
 		a.download = download;