Report which search result is shown in a chat

Searching inside a chat shows which result is being looked at, as "3 of
27" next to the arrows that go through them. The count is drawn rather
than written, so nothing reads it, and going to the next or the previous
result says nothing at all.

Let the count be reached by a screen reader, and have it told as soon as
going through the results moves to another one.

Author: mehranlatifi83

TMessagesProj/src/main/java/org/telegram/ui/ChatActivity.java

@@ -26849,19 +26849,37 @@ private void updateSearchButtons(int mask, int num, int count) {
         }
     }
 
+    private int accessibilityAnnouncedSearchIndex = -1;
+
     private void updateSearchCountText() {
         if (searchCountText != null) {
             boolean animated = !LocaleController.isRTL;
+            final CharSequence text;
             if (searchLastCount < 0) {
-                searchCountText.setText("", animated);
+                text = "";
             } else if (searchLastCount == 0) {
-                searchCountText.setText(LocaleController.getString(R.string.NoResult), animated);
+                text = LocaleController.getString(R.string.NoResult);
             } else if (searchingFiltered) {
-                searchCountText.setText(LocaleController.formatPluralString("TaggedMessages", searchLastCount), animated);
+                text = LocaleController.formatPluralString("TaggedMessages", searchLastCount);
             } else if (chatMode == MODE_SEARCH || isMessagesSearchListVisible()) {
-                searchCountText.setText(LocaleController.formatPluralString("SearchMessagesResultCount", searchLastCount, LocaleController.formatNumber(searchLastCount, ' ')), animated);
+                text = LocaleController.formatPluralString("SearchMessagesResultCount", searchLastCount, LocaleController.formatNumber(searchLastCount, ' '));
             } else {
-                searchCountText.setText(LocaleController.formatString(R.string.Of, searchLastIndex + 1, searchLastCount), animated);
+                text = LocaleController.formatString(R.string.Of, searchLastIndex + 1, searchLastCount);
+            }
+            searchCountText.setText(text, animated);
+            // the count is drawn, so nothing reads it: give it what it shows, since the text it
+            // is set to only reaches it once the animation carrying it is over, and let it be
+            // reached by touch as well as by swiping
+            searchCountText.setContentDescription(text);
+            searchCountText.setImportantForAccessibility(TextUtils.isEmpty(text) ? View.IMPORTANT_FOR_ACCESSIBILITY_NO : View.IMPORTANT_FOR_ACCESSIBILITY_YES);
+            searchCountText.setFocusable(!TextUtils.isEmpty(text));
+            if (searchLastCount > 0 && searchLastIndex != accessibilityAnnouncedSearchIndex && AndroidUtilities.isAccessibilityScreenReaderEnabled()) {
+                if (accessibilityAnnouncedSearchIndex != -1) {
+                    searchCountText.announceForAccessibility(text);
+                }
+                accessibilityAnnouncedSearchIndex = searchLastIndex;
+            } else if (searchLastCount <= 0) {
+                accessibilityAnnouncedSearchIndex = -1;
             }
         }
     }