java-openjdk-xdg-aur/xdg-basedir-compliant-fontconfig.patch

--- a/src/java.desktop/unix/classes/sun/font/FcFontConfiguration.java
+++ b/src/java.desktop/unix/classes/sun/font/FcFontConfiguration.java
@@ -352,7 +352,29 @@
             String userDir = System.getProperty("user.home");
             String version = System.getProperty("java.version");
             String fs = File.separator;
-            String dir = userDir+fs+".java"+fs+"fonts"+fs+version;
+            String dir;
+
+            /* On Linux systems, put the font config into 
+             * ${XDG_CONFIG_HOME:-$HOME/.config}/java/fonts in order to follow
+             * the XDG Base Directory Specification.
+             */
+            if (System.getProperty("os.name").equals("Linux")) {
+                /* assume homedir can be found, which the jvm already does */
+                String xdgDefaultConfigHome = System.getenv("HOME")+"/.config";
+                String xdgConfigHomeEnvVar = "XDG_CONFIG_HOME";
+                String xdgConfigDir;
+
+                String xdgSetConfigDir = System.getenv(xdgConfigHomeEnvVar);
+
+                if (xdgSetConfigDir == null)
+                    xdgConfigDir = xdgDefaultConfigHome;
+                else
+                    xdgConfigDir = xdgSetConfigDir;
+
+                dir = xdgSetConfigDir+"/java/fonts/"+version;
+            } else {
+                dir = userDir+fs+".java"+fs+"fonts"+fs+version;
+            }
             Locale locale = SunToolkit.getStartupLocale();
             String lang = locale.getLanguage();
             String country = locale.getCountry();