Horizontal and vertical lines between brackets (feature request)

[RashiqAzhan]

I would like to see horizontal lines emerging from the bracket pairs that meet a vertical line spanning across the indent. A picture is worth a thousand words so I've included one below.

Is there scope to add this feature? It would help with debugging and focusing on the contents between the parenthesis. Maybe an extra feature to highlight the entire zone, or have it running to right instead of left. The lines could have different colors, weights, patterns, et cetera.

[AprilViolet]

@RashiqAzhan In fact, I have paid attention to the expression style you mentioned. As far as the current idea is concerned, it should be possible to achieve vertical lines, but horizontal and wrapped lines, I did not find some instructions.

[RashiqAzhan]

I do not know how to go about it as well. Nothing of that sort is documented in Jetbrains as far as I know. However, I did notice you can do underlining on text (like a red squiggly line appears if an error is found). Maybe Jetbrains exposes an API that allows setting an underline below certain characters at will for the plugin to use? Just throwing ideas around.