[GTK][Wayland] UI process crash when closing the window

https://bugs.webkit.org/show_bug.cgi?id=185818

Reviewed by Michael Catanzaro.

This happens when a page containing a text field is loaded but the focus remains in the url bar when the window
is closed. This is because we are sending a notify-in to the IM context, but the focus is still in the URL
bar. That confuses the wayland input method manager that tries to free the text of the web view IM context that has
already been deleted.

* UIProcess/gtk/InputMethodFilter.cpp:
(WebKit::InputMethodFilter::setEnabled): Only send notify-in if the view is actually focused.

Canonical link: https://commits.webkit.org/201305@main
git-svn-id: https://svn.webkit.org/repository/webkit/trunk@232049 268f45cc-cd09-0410-ab3c-d52691b4dbfc

Source/WebKit/ChangeLog

@@ -1,3 +1,18 @@
+2018-05-21  Carlos Garcia Campos  <cgarcia@igalia.com>
+
+        [GTK][Wayland] UI process crash when closing the window
+        https://bugs.webkit.org/show_bug.cgi?id=185818
+
+        Reviewed by Michael Catanzaro.
+
+        This happens when a page containing a text field is loaded but the focus remains in the url bar when the window
+        is closed. This is because we are sending a notify-in to the IM context, but the focus is still in the URL
+        bar. That confuses the wayland input method manager that tries to free the text of the web view IM context that has
+        already been deleted.
+
+        * UIProcess/gtk/InputMethodFilter.cpp:
+        (WebKit::InputMethodFilter::setEnabled): Only send notify-in if the view is actually focused.
+
 2018-05-21  Ryosuke Niwa  <rniwa@webkit.org>
 
         Remove unused and no-op WKContextSetCookieStorageDirectory

Source/WebKit/UIProcess/gtk/InputMethodFilter.cpp

@@ -89,7 +89,7 @@ void InputMethodFilter::setEnabled(bool enabled)
     if (!enabled)
         notifyFocusedOut();
     m_enabled = enabled;
-    if (enabled)
+    if (enabled && m_page->isViewFocused())
         notifyFocusedIn();
 }