Calling twice LabeConnector shoudn't end in two overlaid connectors

[haubourg]

Current logic applies a new geometry generator each time.
We could set tags into the geometry expression so that if a geometry generator is already there, with the tags, the plugin would only replace the expression

It is also a possibility to explain user where the expression comes from :

[lbartoletti]

Current logic applies a new geometry generator each time.

Is generated twice if the current style have already an expression for our plugins.

I had seen this in my tests, but I didn't worry about it, since I think it was my responsibility as a user to verify the behavior of the new style or to apply it from a style that didn't contain these arrows.

So, yes, we can verify if the style already has a geometry of the plugin, but what should we do next?

Some questions I had asked myself:
Is it prevented? Does the user want to customize a second arrow according to a condition?
Is it definitely a bug? Isn't it the responsibility of the user to control it?

It is also a possibility to explain user where the expression comes from :

Good Idea!

[lbartoletti]

It is also a possibility to explain user where the expression comes from :

Good Idea!

Done in 3ae3e2b

[haubourg]

Nice, works smoothly