/**
* @param childBlock
* @param widget
* @requires widget != null
* @modifies
* @effects Does nothing if: childBlock is invalid (null) Otherwise, remove childBlock from it's
* parent block if the childBlock has a parent. If it does not have a parent, do nothing.
*/
private void disconnectBlock(Block childBlock, WorkspaceWidget widget) {
if (childBlock == null || invalidBlockID(childBlock.getBlockID())) {
return;
}
BlockConnector childPlug = BlockLinkChecker.getPlugEquivalent(childBlock);
if (childPlug == null || !childPlug.hasBlock() || isNullBlockInstance(childPlug.getBlockID())) {
return;
}
Block parentBlock = workspace.getEnv().getBlock(childPlug.getBlockID());
BlockConnector parentSocket = parentBlock.getConnectorTo(childBlock.getBlockID());
if (parentSocket == null) {
return;
}
// disconector if child connector exists and has a block connected to it
BlockLink link =
BlockLink.getBlockLink(workspace, childBlock, parentBlock, childPlug, parentSocket);
if (link == null) {
return;
}
link.disconnect();
RenderableBlock parentRenderable =
workspace.getEnv().getRenderableBlock(parentBlock.getBlockID());
if (parentRenderable == null) {
throw new RuntimeException(
"INCONSISTANCY VIOLATION: "
+ "parent block was valid, non-null, and existed.\n\tBut yet, when we get it's renderable"
+ "representation, we recieve a null instance.\n\tIf the Block instance of an ID is non-null"
+ "then its graphical RenderableBlock should be non-null as well");
}
parentRenderable.blockDisconnected(parentSocket);
workspace.notifyListeners(
new WorkspaceEvent(workspace, widget, link, WorkspaceEvent.BLOCKS_DISCONNECTED));
}
