Hi,
for those you are currently working with the (wrapping) Browser widget, I have
some useful debugging hints.
Those information are also important for those who try to refactor the widget
since you don’t want to break the following features ;)
0) Unfortunately you can’t use the Eclipse debugger. A call to any run method
will delegate the control flow to the browser used by SWT which does not
support debugging at this stage.
1) Runtime Exceptions thrown in the browser by scripts invoked by Java code
(Browser.run*) are caught and thrown on Future.get().
2) Runtime Exceptions thrown in the browser by scripts invoked by JavaScript
(e.g. a user clicked on a button) are caught and made available using a
registered JavaScriptExceptionListener.
3) SyntaxException are thrown on a get call on the Future object returned by
Browser.open.
4) You can use console.log and console.error in your JavaScript code for
debugging. Calls to these functions are forwarded to the Eclipse console.
5) You can open the currently opened document (in its current state which can
differ from the original state due to DOM modifications) in your system’s
default browser using the Safari/Chrome Web Inspector shortcut (on Mac: Shift +
Alt + Cmd + I). So pressing it twice will open the document in your browser and
open the browser’s web inspector making debugging far less cumbersome than
expected.
Best,
MSc. Inf. Björn Kahlert
[cid:12D5553D-AD16-40D5-986F-BF6FABF0587B]
[cid:53AF5887-D1F2-4BAA-BF6C-CF01BF1C6DB7]
Institute of Computer Science
Software Engineering Working Group
Algorithmic Bioinformatics Working Group
Freie Universität Berlin
Takustr. 9, 14195 Berlin
Phone +49 30 838 75228, Room K25
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