Package org.webkitgtk.webprocessextension

Interface WebPage.UserMessageReceivedCallback

All Superinterfaces:

FunctionPointer

Enclosing class:

WebPage

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 WebPage.UserMessageReceivedCallback
extends FunctionPointer

Functional interface declaration of the UserMessageReceivedCallback callback.

See Also:

• run(org.webkitgtk.webprocessextension.UserMessage)

Method Summary

Modifier and Type	Method	Description
boolean	run(@Nullable UserMessage message)	This signal is emitted when a WebKitUserMessage is received from the WebKitWebView corresponding to webPage. You can reply to the message using webkit_user_message_send_reply().
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 sourceWebPage, MemorySegment message)	The upcall method is called from native code.

Method Details

run

boolean run(@Nullable UserMessage message)

This signal is emitted when a WebKitUserMessage is received from the WebKitWebView corresponding to webPage. 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 been replied, the operation in the WebKitWebView will finish with error UserMessageError.USER_MESSAGE_UNHANDLED_MESSAGE.

Since:

2.28

upcall

default int upcall(MemorySegment sourceWebPage,
 MemorySegment message)

The upcall method is called from native code. The parameters are marshaled and run(org.webkitgtk.webprocessextension.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 arena in which the function pointer is allocated

Returns:

the native function pointer