[java-atk-wrapper] Also use dbus to detect accessibility being enabled

[Samuel Thibault <sthibaul src gnome org>]

commit 43576f265a16de8f1cd16c8a09d0e6a6006cbe3c
Author: Samuel Thibault <samuel thibault ens-lyon org>
Date:   Thu Aug 26 02:49:06 2021 +0200

    Also use dbus to detect accessibility being enabled
    
    This is required if for some reason the AT_SPI_BUS property is not set.
    That happens for instance if for some reason the dbus session bus (and thus
    the at-spi bus) is reused between X sessions.

 wrapper/org/GNOME/Accessibility/AtkWrapper.java.in | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)
---
diff --git a/wrapper/org/GNOME/Accessibility/AtkWrapper.java.in 
b/wrapper/org/GNOME/Accessibility/AtkWrapper.java.in
index cb267fd..d91b985 100644
--- a/wrapper/org/GNOME/Accessibility/AtkWrapper.java.in
+++ b/wrapper/org/GNOME/Accessibility/AtkWrapper.java.in
@@ -32,6 +32,11 @@ import java.lang.management.*;
 
 public class AtkWrapper {
   static boolean accessibilityEnabled = false;
+  static void initAtk() {
+    System.loadLibrary("atk-wrapper");
+    if (AtkWrapper.initNativeLibrary())
+      accessibilityEnabled = true;
+  }
   static {
     try {
       Process p = Runtime.getRuntime().exec("@XPROP@ -root");
@@ -39,13 +44,20 @@ public class AtkWrapper {
       String result;
       while ((result = b.readLine()) != null) {
         if (result.indexOf("AT_SPI_IOR") >= 0 || result.indexOf("AT_SPI_BUS") >= 0) {
-          System.loadLibrary("atk-wrapper");
-          if (AtkWrapper.initNativeLibrary())
-            accessibilityEnabled = true;
+          initAtk();
           break;
         }
       }
 
+      if (!accessibilityEnabled) {
+        p = Runtime.getRuntime().exec("dbus-send --session --dest=org.a11y.Bus --print-reply /org/a11y/bus 
org.a11y.Bus.GetAddress");
+        b = new BufferedReader(new InputStreamReader (p.getInputStream ()));
+        while ((b.readLine()) != null);
+        p.waitFor();
+        if (p.exitValue() == 0)
+          initAtk();
+      }
+
       java.util.List<GarbageCollectorMXBean> gcbeans = ManagementFactory.getGarbageCollectorMXBeans();
       for (GarbageCollectorMXBean gcbean : gcbeans) {
        NotificationEmitter emitter = (NotificationEmitter) gcbean;