[jbosstools-issues] [JBoss JIRA] (ERT-527) [GTK3][Webkit2] Implement webkit2 support for browser function (Part 2: Java return a value from callback.) [EBZ#510905]

Friendly Jira Robot created ERT-527: --------------------------------------- Summary: [GTK3][Webkit2] Implement webkit2 support for browser function (Part 2: Java return a value from callback.) [EBZ#510905] Key: ERT-527 URL: https://issues.jboss.org/browse/ERT-527 Project: Eclipse Release Train Issue Type: Task Components: Platform Reporter: Friendly Jira Robot The mechanism whereby javascript calls java in Part1 (Bug 508217) has a limitation. Javascript can reach Java's callback. But the callback on the javaside cannot return a value back to javascript. I don't think this functionality is used much, but never the less it is a current limitation. (Note, Java can execute javascript via 'execute()' call still). The jUnit test case for this scenario is: org.eclipse.swt.tests.junit.Test_org_eclipse_swt_browser_Browser.test_BrowserFunction_callback_with_javaReturningInt() The api that I used in Part1 allows Javascript to call Java asynchronously. I.e, meaning once the callback is executed on the java side, it doesn't return a value: https://webkitgtk.org/reference/webkit2gtk/stable/WebKitUserContentManage... This is a limitation of the webkit2 api itself. The signal has a void return value and since it is async, the call from javascript to java is not executed right away, but is delayed for a bit. One possible (complex) solution might be: - Create webkitweb extension (this is tricky..) - Manually create a C/Javascript object (webkit1 does this, 'external', might re-use this functionality). - Expose Js function/object via JavaSciptCoreApi - Suggested by aperezdc/mcatanzaro on freednode#webkitgtk+ Example: https://git.gnome.org/browse/epiphany/tree/embed/web-extension/ephy-web-e... -- This message was sent by Atlassian JIRA (v7.5.0#75005)