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FIx undo/redo for collapsed subprocesses #957

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89f79d5
fix(move-connection): null check new parent on revert
jarekdanielak Jan 9, 2025
7465a5e
fix(core/GrahicsFactory): account for removed shapes on updateContain…
jarekdanielak Jan 9, 2025
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5 changes: 5 additions & 0 deletions lib/core/GraphicsFactory.js
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Original file line number Diff line number Diff line change
Expand Up @@ -192,6 +192,11 @@
forEach(children.slice().reverse(), function(child) {
var childGfx = elementRegistry.getGraphics(child);
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@nikku nikku Jan 10, 2025

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I struggle to understand in which situation this can become an issue, could you elaborate? And would you be able to model this as a test case in diagram-js?

From what I understand:

  • GraphicsFactory#updateContainment is being called after any change operation happened (ref)
  • At this stage, looking at the model, parents for updated children are collected
  • Then the children inside these parents are re-ordered
  • BUT some of the children are actually NOT part of the render tree anymore?

The BUT is the big issue for me. How can children exist, but not actually be rendered? Where don't we properly update the model before we render?

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@barmac barmac Jan 10, 2025

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It may also be that we messed up the bpmn-js implementation.


// shape was removed
if (!childGfx) {
return;

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}

prependTo(childGfx.parentNode, childrenGfx);
});
});
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2 changes: 1 addition & 1 deletion lib/features/modeling/cmd/MoveConnectionHandler.js
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Expand Up @@ -58,7 +58,7 @@ MoveConnectionHandler.prototype.revert = function(context) {
delta = context.delta;

// remove from newParent
collectionRemove(newParent.children, connection);
newParent && collectionRemove(newParent.children, connection);

// restore previous location in old parent
collectionAdd(oldParent.children, connection, oldParentIndex);
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