xwidget: Use WebKit2 API

* configure.ac: Check for webkit2gtk-4.0.
* src/xwidget.c: Adjust to use WebKit2 API.
* lisp/xwidget.el (xwidget-webkit-callback): Adjust matches for
`xwidget-event-type'.

1 files changed, 2 insertions, 3 deletions

diff --git a/lisp/xwidget.el b/lisp/xwidget.el
index 7a0ca8bd551..1bae6bb8b47 100644
--- a/lisp/xwidget.el
+++ b/lisp/xwidget.el
@@ -187,7 +187,7 @@ XWIDGET instance, XWIDGET-EVENT-TYPE depends on the originating xwidget."
        "error: callback called for xwidget with dead buffer")
     (with-current-buffer (xwidget-buffer xwidget)
       (let* ((strarg  (nth 3 last-input-event)))
-        (cond ((eq xwidget-event-type 'document-load-finished)
+        (cond ((eq xwidget-event-type 'load-changed)
                (xwidget-log "webkit finished loading: '%s'"
                             (xwidget-webkit-get-title xwidget))
                ;;TODO - check the native/internal scroll
@@ -196,8 +196,7 @@ XWIDGET instance, XWIDGET-EVENT-TYPE depends on the originating xwidget."
                (rename-buffer (format "*xwidget webkit: %s *"
                                       (xwidget-webkit-get-title xwidget)))
                (pop-to-buffer (current-buffer)))
-              ((eq xwidget-event-type
-                   'navigation-policy-decision-requested)
+              ((eq xwidget-event-type 'decide-policy)
                (if (string-match ".*#\\(.*\\)" strarg)
                    (xwidget-webkit-show-id-or-named-element
                     xwidget