Manual line shape always lost

[phxnsharp]

Much like in #19 I am using manual layouts. I am not experiencing their complete loss of position. Moving blocks and components around is saved fine. However, any edits to the line locations and shape is (for my complex diagrams) lost every single time the page is loaded. This makes structurizr somewhat unusable as I cannot make the lines correct at all.

Reproduction:

workspace {
  model {
    ExternalSystem = softwareSystem "External System"
    System = softwareSystem "The Project"
    ExternalSystem -> System
    System -> ExternalSystem
  }

  views {
    systemContext System "SystemContext" "Top Level Context" {
      include *
    }
  }
}

Launch structurizr lite:

docker run -d  --rm -p 8080:8080 -v ${PWD}:/usr/local/structurizr structurizr/lite:2920

View the page:

Move the blocks and also change the line locations. Note that with this simple model, sometimes the line positions are saved, sometimes they are lost. The simple edit that is always lost is to remove the elbow so that the lines are straight and overlapping.

Ensure that the save has completed

Press f5 to reload the page. The block positions are saved, but the lines positions are lost:

[simonbrowndotje]

There's some code in the diagram renderer that detects cyclic arrows (as shown in image 2) and breaks them apart (as shown in image 3). So what you're seeing is the expected behaviour.

[phxnsharp]

For a new user, it is pretty frustrating to have it overwrite manual adjustments I have made. But with this information, a simple workaround is to leave the elbow point, but just have the elbow in a straight line. Thank you.

[simonbrowndotje]

Are you trying to replicate a bi-directional arrow?

[phxnsharp]

Yes

[simonbrowndotje]

I don't recommend bi-directional arrows as they are generally ambiguous, which is why Structurizr doesn't support them. Sorry!