Bug 1556103 - Part 2. Long press doesn't show virtual keyboard. r=geckoview-reviewers,snorp

When long tapping on input element, the behavior of virtual keyboard is different of Chrome.  Firefox opens virtual keyboard, but Chrome doesn't.

So I would like to change to same behavior of Chrome.

Also, after this fix, action bar (copy, paste and etc) won't be disappeared immediately after it appears by long tap.  Before applying this fix, virtual keyboard is shown, then focused element is scrolled to center.  So action bar may be disappeared.  But after applying this fix, focused element isn't scrolled. So action bar keeps same position.

Depends on D35991

Differential Revision: https://phabricator.services.mozilla.com/D35992

--HG--
extra : moz-landing-system : lando

widget/android/GeckoEditableSupport.cpp

@@ -1531,8 +1531,11 @@ void GeckoEditableSupport::SetInputContext(const InputContext& aContext,
 void GeckoEditableSupport::NotifyIMEContext(const InputContext& aContext,
                                             const InputContextAction& aAction) {
   const bool inPrivateBrowsing = aContext.mInPrivateBrowsing;
+  // isUserAction is used whether opening virtual keyboard. But long press
+  // shouldn't open it.
   const bool isUserAction =
-      aAction.IsHandlingUserInput() || aContext.mHasHandledUserInput;
+      aAction.mCause != InputContextAction::CAUSE_LONGPRESS &&
+      (aAction.IsHandlingUserInput() || aContext.mHasHandledUserInput);
   const int32_t flags =
       (inPrivateBrowsing ? EditableListener::IME_FLAG_PRIVATE_BROWSING : 0) |
       (isUserAction ? EditableListener::IME_FLAG_USER_ACTION : 0);