Hy,

I've noticed a weird bug in my code where changing programatically the editor font breaks code folding (it's related to an older bug #153316 ).

The underlying problem with the latest codebase seems to be the EditorUI.updateLineHeight method which has this 'if' at the end:

        if (HighlightingManager.LINEWRAP_ENABLED) {
            maxHeight = -1;
            View rootView = Utilities.getDocumentView(component);
            ...
        }

What this seems to do is reset maxHeight and only take into consideration the data for the first line. I think this breaks the notion of holding the maximum height into maxHeight.

What I've done on my side is disable LINEWRAP_ENABLED entirely but I think the -1 reset looks suspicious.