From adb2bb5af89ab289b4484d87e99b2b483fb34aea Mon Sep 17 00:00:00 2001
From: Calixte Denizet <calixte.denizet@gmail.com>
Date: Thu, 23 May 2024 22:22:29 +0200
Subject: [PATCH] [GeckoView] Don't use the system fonts (bug 1882613)

On Android there's almost no chance we find a substitution font so
just use one of the font embedded in pdf.js.
---
 web/app.js | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/web/app.js b/web/app.js
index e91829797aab3..9d10550845e91 100644
--- a/web/app.js
+++ b/web/app.js
@@ -1004,6 +1004,16 @@ const PDFViewerApplication = {
       AppOptions.set("docBaseUrl", this.baseUrl);
     }
 
+    // On Android, there is almost no chance to have the font we want so we
+    // don't use the system fonts in this case.
+    if (
+      typeof PDFJSDev === "undefined"
+        ? window.isGECKOVIEW
+        : PDFJSDev.test("GECKOVIEW")
+    ) {
+      args.useSystemFonts = false;
+    }
+
     // Set the necessary API parameters, using all the available options.
     const apiParams = AppOptions.getAll(OptionKind.API);
     const loadingTask = getDocument({