Package org.gnome.webkit

Interface WebView.UserMessageReceivedCallback

All Superinterfaces:

FunctionPointer

Enclosing class:

WebView

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public static interface WebView.UserMessageReceivedCallback
extends FunctionPointer

Functional interface declaration of the UserMessageReceivedCallback callback.

See Also:

• run(org.gnome.webkit.UserMessage)

Method Summary

Modifier and Type	Method	Description
boolean	run(UserMessage message)	This signal is emitted when a WebKitUserMessage is received from the WebKitWebPage corresponding to webView.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment) method.
default int	upcall(MemorySegment sourceWebView, MemorySegment message)	The upcall method is called from native code.

Method Details

run

boolean run(UserMessage message)

This signal is emitted when a WebKitUserMessage is received from the WebKitWebPage corresponding to webView. You can reply to the message using webkit_user_message_send_reply().

You can handle the user message asynchronously by calling g_object_ref() on message and returning true. If the last reference of message is removed and the message has not been replied to, the operation in the WebKitWebPage will finish with error UserMessageError.USER_MESSAGE_UNHANDLED_MESSAGE.

upcall

default int upcall(MemorySegment sourceWebView,
 MemorySegment message)

The upcall method is called from native code. The parameters are marshaled and run(org.gnome.webkit.UserMessage) is executed.

toCallback

default MemorySegment toCallback(Arena arena)

Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment) method.

Specified by:

toCallback in interface FunctionPointer

Parameters:

arena - the function pointer will be allocated in this arena

Returns:

the native function pointer