Textarea bug when a line is preceded by new line

[fgnm]

I've create a very simple textarea without any special stuff:

VisTextArea textArea = new VisTextArea("");
getContentTable().add(textArea).grow();

But I've a strange bug when I start typing after a new line. As you can see from the GIF, the cursor does not arrives at the end of the line, this is not just a visual bug, but causes also many crashes of that kind during selection or clicks in the textarea.

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: Index 28 out of bounds for length 28
	at com.kotcrab.vis.ui.widget.VisTextField.calculateOffsets(VisTextField.java:259)
	at com.kotcrab.vis.ui.widget.VisTextArea.calculateOffsets(VisTextArea.java:283)
	at com.kotcrab.vis.ui.widget.VisTextField.draw(VisTextField.java:347)
	at com.badlogic.gdx.scenes.scene2d.Group.drawChildren(Group.java:124)
	at com.badlogic.gdx.scenes.scene2d.Group.draw(Group.java:58)
	at com.badlogic.gdx.scenes.scene2d.ui.WidgetGroup.draw(WidgetGroup.java:170)
	at com.badlogic.gdx.scenes.scene2d.ui.Table.draw(Table.java:120)
	at com.badlogic.gdx.scenes.scene2d.Group.drawChildren(Group.java:111)
	at com.badlogic.gdx.scenes.scene2d.ui.Table.draw(Table.java:111)
	at com.badlogic.gdx.scenes.scene2d.ui.Window.draw(Window.java:252)
	at com.kotcrab.vis.ui.widget.VisWindow.draw(VisWindow.java:239)
	at com.badlogic.gdx.scenes.scene2d.Group.drawChildren(Group.java:111)
	at com.badlogic.gdx.scenes.scene2d.Group.draw(Group.java:58)
	at com.badlogic.gdx.scenes.scene2d.Stage.draw(Stage.java:129)

Or this

Caused by: java.lang.IndexOutOfBoundsException: index can't be >= size: 116 >= 114
	at com.badlogic.gdx.utils.FloatArray.get(FloatArray.java:131)
	at com.kotcrab.vis.ui.widget.VisTextArea.moveCursorLine(VisTextArea.java:164)
	at com.kotcrab.vis.ui.widget.VisTextArea$TextAreaListener.keyDown(VisTextArea.java:437)
	at com.badlogic.gdx.scenes.scene2d.InputListener.handle(InputListener.java:53)
	at com.badlogic.gdx.scenes.scene2d.Actor.notify(Actor.java:188)
	... 10 more

I already use a mono spaced font generated from a TTF. Could you help me to identify the cause of that bug? Unfortunately, in test window I connot reproduce it.

[kotcrab]

I'd recommend first trying it with libgdx's TextArea, maybe some fix wasn't ported.

[fgnm]

Yes, I've tried with Scene2D's TextArea and same style I use for VisTextArea and this issue is not present, it works fine

[kotcrab]

So fixing this requires syncing sources of VisTextField and VisTextArea with libgdx.

[fgnm]

I've look at commits in libGDX and I've found that with this two the issue is fixed: libgdx/libgdx@c2d2313#diff-81602c9f8b4b94e2ec22c65427fbd35b and libgdx/libgdx@b0d8a2b#diff-81602c9f8b4b94e2ec22c65427fbd35b

There are also a lot of other commits that might be good (or not) for VisUI too, however I don't know if they may affects others VisTextField functionalities, so please let me know if you prefer a PR with that two changes or wait for a yours fix, thanks.

[kotcrab]

Looks like you already figured it out. I'd prefer a PR with those two fixes.