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The guidelines here are: Entity methods: return a modified entity don't necessarily maintain whole-graph consistency Actions: return a modified graph always maintain whole-graph consistency call entity methods liberally generally don't call other actions
38 lines
1.2 KiB
JavaScript
38 lines
1.2 KiB
JavaScript
// Unjoin the ways at the given node.
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//
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// For testing convenience, accepts an ID to assign to the (first) new node.
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// Normally, this will be undefined and the way will automatically
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// be assigned a new ID.
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//
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// Reference:
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// https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/UnjoinNodeAction.as
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// https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/UnGlueAction.java
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//
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iD.actions.UnjoinNode = function(nodeId, newNodeId) {
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var action = function(graph) {
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if (!action.permitted(graph))
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return graph;
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var node = graph.entity(nodeId);
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graph.parentWays(node).forEach(function(parent, i) {
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if (i === 0)
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return;
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var index = parent.nodes.indexOf(nodeId),
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newNode = iD.Node({id: newNodeId, loc: node.loc, tags: node.tags});
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graph = graph.replace(newNode);
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graph = graph.replace(parent.updateNode(newNode.id, index));
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});
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return graph;
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};
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action.permitted = function(graph) {
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return graph.parentWays(graph.entity(nodeId)).length >= 2;
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};
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return action;
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};
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