Signal

WebKit2WebView::decide-policy

Declaration

gboolean
decide_policy (
  WebKitWebView* self,
  WebKit2PolicyDecision* decision,
  WebKitPolicyDecisionType decision_type,
  gpointer user_data
)

Description [src]

This signal is emitted when WebKit is requesting the client to decide a policy decision, such as whether to navigate to a page, open a new window or whether or not to download a resource. The WebKitNavigationPolicyDecision passed in the decision argument is a generic type, but should be casted to a more specific type when making the decision. For example:

static gboolean
decide_policy_cb (WebKitWebView *web_view,
                  WebKitPolicyDecision *decision,
                  WebKitPolicyDecisionType type)
{
    switch (type) {
    case WEBKIT_POLICY_DECISION_TYPE_NAVIGATION_ACTION: {
        WebKitNavigationPolicyDecision *navigation_decision = WEBKIT_NAVIGATION_POLICY_DECISION (decision);
        // Make a policy decision here
        break;
    }
    case WEBKIT_POLICY_DECISION_TYPE_NEW_WINDOW_ACTION: {
        WebKitNavigationPolicyDecision *navigation_decision = WEBKIT_NAVIGATION_POLICY_DECISION (decision);
        // Make a policy decision here
        break;
    }
    case WEBKIT_POLICY_DECISION_TYPE_RESPONSE:
        WebKitResponsePolicyDecision *response = WEBKIT_RESPONSE_POLICY_DECISION (decision);
        // Make a policy decision here
        break;
    default:
        // Making no decision results in webkit_policy_decision_use()
        return FALSE;
    }
    return TRUE;
}

It is possible to make policy decision asynchronously, by simply calling g_object_ref() on the decision argument and returning TRUE to block the default signal handler. If the last reference is removed on a WebKitPolicyDecision and no decision has been made explicitly, webkit_policy_decision_use() will be the default policy decision. The default signal handler will simply call webkit_policy_decision_use(). Only the first policy decision chosen for a given WebKitPolicyDecision will have any affect.

Default handler:

The default handler is called after the handlers added via g_signal_connect().

Parameters

decision

Type: WebKitPolicyDecision

The WebKitPolicyDecision.

The data is owned by the caller of the function.

decision_type

Type: WebKitPolicyDecisionType

A WebKitPolicyDecisionType denoting the type of decision.

Return value

Type: gboolean

TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further.