Add search view extension for incognito keyboards.

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/ConversationFragment.kt

@@ -320,6 +320,7 @@ import org.thoughtcrime.securesms.util.hasNonTextSlide
 import org.thoughtcrime.securesms.util.isValidReactionTarget
 import org.thoughtcrime.securesms.util.padding
 import org.thoughtcrime.securesms.util.savedStateViewModel
+import org.thoughtcrime.securesms.util.setIncognitoKeyboardEnabled
 import org.thoughtcrime.securesms.util.toMillis
 import org.thoughtcrime.securesms.util.viewModel
 import org.thoughtcrime.securesms.util.views.Stub
@@ -3255,6 +3256,7 @@ class ConversationFragment :
 
       searchMenuItem!!.setOnActionExpandListener(object : MenuItem.OnActionExpandListener {
         override fun onMenuItemActionExpand(item: MenuItem): Boolean {
+          searchView.setIncognitoKeyboardEnabled(TextSecurePreferences.isIncognitoKeyboardEnabled(requireContext()))
           searchView.setOnQueryTextListener(queryListener)
           isSearchRequested = true
           searchViewModel.onSearchOpened()

app/src/main/java/org/thoughtcrime/securesms/util/EditTextExtensions.kt

@@ -1,6 +1,7 @@
 package org.thoughtcrime.securesms.util
 
 import android.widget.EditText
+import androidx.appcompat.widget.SearchView
 
 /**
  * Since this value is only supported on API26+ we hard-code it here
@@ -14,7 +15,19 @@ private const val INCOGNITO_KEYBOARD = 16777216
  * be respected by all IMEs.
  */
 fun EditText.setIncognitoKeyboardEnabled(isIncognitoKeyboardEnabled: Boolean) {
-  imeOptions = if (isIncognitoKeyboardEnabled) {
+  imeOptions = setIncognitoFlag(imeOptions, isIncognitoKeyboardEnabled)
+}
+
+/**
+ * Enables or disables incognito-mode for the keyboard. Note that this might not
+ * be respected by all IMEs.
+ */
+fun SearchView.setIncognitoKeyboardEnabled(isIncognitoKeyboardEnabled: Boolean) {
+  imeOptions = setIncognitoFlag(imeOptions, isIncognitoKeyboardEnabled)
+}
+
+private fun setIncognitoFlag(imeOptions: Int, isIncognitoKeyboardEnabled: Boolean): Int {
+  return if (isIncognitoKeyboardEnabled) {
     imeOptions or INCOGNITO_KEYBOARD
   } else {
     imeOptions and INCOGNITO_KEYBOARD.inv()