[GTK4] Update to new GTK4 api needed for webkit_decide_policy

The API for getting the request information (from which URI is extracted)
changed between GTK3 and GTK4 (technically between webkit2gtk 4 and
webkitgtk 6)

This needs to work so we can enable javascript and is therefore
required as a pre-requisite to make #2667 work.

Part of #2667

Author: jonahgraham

bundles/org.eclipse.swt/Eclipse SWT WebKit/gtk/library/webkitgtk.c

@@ -1225,6 +1225,46 @@ JNIEXPORT void JNICALL WebKitGTK_NATIVE(webkit_1javascript_1result_1unref)
 }
 #endif
 
+#ifndef NO_webkit_1navigation_1action_1get_1request
+JNIEXPORT jlong JNICALL WebKitGTK_NATIVE(webkit_1navigation_1action_1get_1request)
+	(JNIEnv *env, jclass that, jlong arg0)
+{
+	jlong rc = 0;
+	WebKitGTK_NATIVE_ENTER(env, that, webkit_1navigation_1action_1get_1request_FUNC);
+/*
+	rc = (jlong)webkit_navigation_action_get_request(arg0);
+*/
+	{
+		WebKitGTK_LOAD_FUNCTION(fp, webkit_navigation_action_get_request)
+		if (fp) {
+			rc = (jlong)((jlong (CALLING_CONVENTION*)(jlong))fp)(arg0);
+		}
+	}
+	WebKitGTK_NATIVE_EXIT(env, that, webkit_1navigation_1action_1get_1request_FUNC);
+	return rc;
+}
+#endif
+
+#ifndef NO_webkit_1navigation_1policy_1decision_1get_1navigation_1action
+JNIEXPORT jlong JNICALL WebKitGTK_NATIVE(webkit_1navigation_1policy_1decision_1get_1navigation_1action)
+	(JNIEnv *env, jclass that, jlong arg0)
+{
+	jlong rc = 0;
+	WebKitGTK_NATIVE_ENTER(env, that, webkit_1navigation_1policy_1decision_1get_1navigation_1action_FUNC);
+/*
+	rc = (jlong)webkit_navigation_policy_decision_get_navigation_action(arg0);
+*/
+	{
+		WebKitGTK_LOAD_FUNCTION(fp, webkit_navigation_policy_decision_get_navigation_action)
+		if (fp) {
+			rc = (jlong)((jlong (CALLING_CONVENTION*)(jlong))fp)(arg0);
+		}
+	}
+	WebKitGTK_NATIVE_EXIT(env, that, webkit_1navigation_1policy_1decision_1get_1navigation_1action_FUNC);
+	return rc;
+}
+#endif
+
 #ifndef NO_webkit_1navigation_1policy_1decision_1get_1request
 JNIEXPORT jlong JNICALL WebKitGTK_NATIVE(webkit_1navigation_1policy_1decision_1get_1request)
 	(JNIEnv *env, jclass that, jlong arg0)

bundles/org.eclipse.swt/Eclipse SWT WebKit/gtk/library/webkitgtk_stats.h

@@ -82,6 +82,8 @@ typedef enum {
 	webkit_1javascript_1result_1get_1global_1context_FUNC,
 	webkit_1javascript_1result_1get_1value_FUNC,
 	webkit_1javascript_1result_1unref_FUNC,
+	webkit_1navigation_1action_1get_1request_FUNC,
+	webkit_1navigation_1policy_1decision_1get_1navigation_1action_FUNC,
 	webkit_1navigation_1policy_1decision_1get_1request_FUNC,
 	webkit_1network_1session_1get_1cookie_1manager_FUNC,
 	webkit_1network_1session_1get_1default_FUNC,

bundles/org.eclipse.swt/Eclipse SWT WebKit/gtk/org/eclipse/swt/browser/WebKit.java

@@ -2341,7 +2341,16 @@ long webkit_hovering_over_link (long web_view, long title, long uri) {
 long webkit_decide_policy (long web_view, long decision, int decision_type, long user_data) {
 	switch (decision_type) {
 	case WebKitGTK.WEBKIT_POLICY_DECISION_TYPE_NAVIGATION_ACTION:
-		long request = WebKitGTK. webkit_navigation_policy_decision_get_request(decision);
+		long request;
+		if (GTK.GTK4) {
+			long navigation = WebKitGTK. webkit_navigation_policy_decision_get_navigation_action(decision);
+			if (navigation == 0) {
+				return 0;
+			}
+			request = WebKitGTK.webkit_navigation_action_get_request(navigation);
+		} else {
+			request = WebKitGTK. webkit_navigation_policy_decision_get_request(decision);
+		}
 		if (request == 0){
 			return 0;
 		}

bundles/org.eclipse.swt/Eclipse SWT WebKit/gtk/org/eclipse/swt/internal/webkit/WebKitGTK.java

@@ -353,6 +353,12 @@ public class WebKitGTK extends C {
 /** @method flags=dynamic */
 public static final native long webkit_navigation_policy_decision_get_request(long decision);
 
+/** @method flags=dynamic */
+public static final native long webkit_navigation_policy_decision_get_navigation_action(long decision);
+
+/** @method flags=dynamic */
+public static final native long webkit_navigation_action_get_request(long navigation);
+
 /** @method flags=dynamic */
 public static final native void webkit_policy_decision_download(long decision);