Package org.gnome.webkit

Interface UserContentManager.ScriptMessageWithReplyReceivedCallback

All Superinterfaces:

FunctionPointer

Enclosing class:

UserContentManager

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 UserContentManager.ScriptMessageWithReplyReceivedCallback
extends FunctionPointer

Functional interface declaration of the ScriptMessageWithReplyReceivedCallback callback.

See Also:

• run(org.gnome.webkit.jsc.Value, org.gnome.webkit.ScriptMessageReply)

Method Summary

Modifier and Type	Method	Description
boolean	run(Value value, ScriptMessageReply reply)	This signal is emitted when JavaScript in a web view calls <code>window.webkit.messageHandlers.<name>.postMessage()</code>, after registering <code><name></code> using webkit_user_content_manager_register_script_message_handler_with_reply()
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment) method.
default int	upcall(MemorySegment sourceUserContentManager, MemorySegment value, MemorySegment reply)	The upcall method is called from native code.

Method Details

run

boolean run(Value value,
 ScriptMessageReply reply)

This signal is emitted when JavaScript in a web view calls <code>window.webkit.messageHandlers.<name>.postMessage()</code>, after registering <code><name></code> using webkit_user_content_manager_register_script_message_handler_with_reply()

The given reply can be used to send a return value with webkit_script_message_reply_return_value() or an error message with webkit_script_message_reply_return_error_message(). If none of them are called, an automatic reply with an undefined value will be sent.

It is possible to handle the reply asynchronously, by simply calling g_object_ref() on the reply and returning true.

upcall

default int upcall(MemorySegment sourceUserContentManager,
 MemorySegment value,
 MemorySegment reply)

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

toCallback

default MemorySegment toCallback(Arena arena)

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