Explicit bounding box for (some/all?) labels

[cannin]

Sarah:
Labels should have an explicit bounding box, not an implicit bounding box (= inferred from the bounding box of the surrounding node)

Problem with an implicit bbox:

• Label may intersect with node decorations (markers, units of information, state variables)
• Even worse with compartments (full of all sorts of things)

Reported by: alice_villeger

[cannin]

Observation
An explicit bounding box is:

• essential for compartments (no SBGN rules at all for where such label should be placed)
• probably a good idea for nodes with a lot of decorations (but less essential than for compartments)
• not very useful for simple nodes (but doesn't hurt much either)

First solution:
(1) bounding box for labels are:

• mandatory for compartments
• optional but recommended for decorated nodes
• optional but permitted for simple nodes?

Alternative solution:
(2) always use a bounding box for all labels?

Original comment by: alice_villeger

[cannin]

• milestone: --> Milestone 1
• assigned_to: nobody --> fbergmann

Original comment by: amarillion

[cannin]

Frank recommends to start by copying the layout extension.

Original comment by: amarillion

[cannin]

• status: open --> closed-duplicate

Original comment by: amarillion

[cannin]

This is now a duplicate of #3044617

Original comment by: amarillion