Better snapping in node editor

In addition to snapping to grid, blender already have snapping to the borders of other nodes:

It can be found here:

.

The suggestion is to redo it.

The list of tasks is short:

1. Define proximity to span line not for the cursor, but for the borders of the dragged node.
2. Snapping should work not only for top-top, left-left. It should attract any parallel lines.
3. This should be able to work for multiple nodes being moved individually.
4. The lines must be the same to snap to the center of the node.
5. Snapping must be for both node bounds and for sockets.
6. Customizable padding from node borders