Android A11Y: handle LocationChanged event only for focused element

LocationChanged event unconditionally triggered invalidateVirtualViewId
call. That call results in TYPE_WINDOW_CONTENT_CHANGED Android event,
which causes a lot of background processing.
That is not correct, because LocationChanged event is generated by
every accessible element, not only the one that has A11Y focus.

This patch checks event->uniqueId(), and processes only events that
come from the focused accessible element.

Done-with: Mike Achtelik <mike.achtelik@gmail.com>
Task-number: QTBUG-102594
Pick-to: 6.3 6.2 5.15
Change-Id: I6b941733c9d215fed5ee5a7aeeb5be234add9ebe
Reviewed-by: Mike Achtelik <mike.achtelik@gmail.com>
Reviewed-by: Jan Arve Sæther <jan-arve.saether@qt.io>

4 files changed, 9 insertions, 8 deletions

diff --git a/src/android/jar/src/org/qtproject/qt/android/QtActivityDelegate.java b/src/android/jar/src/org/qtproject/qt/android/QtActivityDelegate.java
index 24098de241..bf9a7d5961 100644
--- a/src/android/jar/src/org/qtproject/qt/android/QtActivityDelegate.java
+++ b/src/android/jar/src/org/qtproject/qt/android/QtActivityDelegate.java
@@ -949,11 +949,11 @@ public class QtActivityDelegate
         m_splashScreen.startAnimation(fadeOut);
     }
 
-    public void notifyAccessibilityLocationChange()
+    public void notifyAccessibilityLocationChange(int viewId)
     {
         if (m_accessibilityDelegate == null)
             return;
-        m_accessibilityDelegate.notifyLocationChange();
+        m_accessibilityDelegate.notifyLocationChange(viewId);
     }
 
     public void notifyObjectHide(int viewId, int parentId)
diff --git a/src/android/jar/src/org/qtproject/qt/android/QtNative.java b/src/android/jar/src/org/qtproject/qt/android/QtNative.java
index e750159d8c..bc090db25d 100644
--- a/src/android/jar/src/org/qtproject/qt/android/QtNative.java
+++ b/src/android/jar/src/org/qtproject/qt/android/QtNative.java
@@ -973,13 +973,13 @@ public class QtNative
         return m_activityDelegate.isKeyboardVisible() && !m_isKeyboardHiding;
     }
 
-    private static void notifyAccessibilityLocationChange()
+    private static void notifyAccessibilityLocationChange(final int viewId)
     {
         runAction(new Runnable() {
             @Override
             public void run() {
                 if (m_activityDelegate != null) {
-                    m_activityDelegate.notifyAccessibilityLocationChange();
+                    m_activityDelegate.notifyAccessibilityLocationChange(viewId);
                 }
             }
         });
diff --git a/src/android/jar/src/org/qtproject/qt/android/accessibility/QtAccessibilityDelegate.java b/src/android/jar/src/org/qtproject/qt/android/accessibility/QtAccessibilityDelegate.java
index c5f5fb92e6..c8503b42da 100644
--- a/src/android/jar/src/org/qtproject/qt/android/accessibility/QtAccessibilityDelegate.java
+++ b/src/android/jar/src/org/qtproject/qt/android/accessibility/QtAccessibilityDelegate.java
@@ -193,9 +193,10 @@ public class QtAccessibilityDelegate extends View.AccessibilityDelegate
         return true;
     }
 
-    public void notifyLocationChange()
+    public void notifyLocationChange(int viewId)
     {
-        invalidateVirtualViewId(m_focusedVirtualViewId);
+        if (m_focusedVirtualViewId == viewId)
+            invalidateVirtualViewId(m_focusedVirtualViewId);
     }
 
     public void notifyObjectHide(int viewId, int parentId)
diff --git a/src/android/java/src/org/qtproject/qt/android/bindings/QtActivity.java b/src/android/java/src/org/qtproject/qt/android/bindings/QtActivity.java
index 0242f05693..47b500fbf3 100644
--- a/src/android/java/src/org/qtproject/qt/android/bindings/QtActivity.java
+++ b/src/android/java/src/org/qtproject/qt/android/bindings/QtActivity.java
@@ -1133,9 +1133,9 @@ public class QtActivity extends Activity
         QtNative.activityDelegate().updateSelection(selStart, selEnd, candidatesStart, candidatesEnd);
     }
 
-    public void notifyAccessibilityLocationChange()
+    public void notifyAccessibilityLocationChange(int viewId)
     {
-        QtNative.activityDelegate().notifyAccessibilityLocationChange();
+        QtNative.activityDelegate().notifyAccessibilityLocationChange(viewId);
     }
 
     public void notifyObjectHide(int viewId, int parentId)