function canPaste(tree, target) {
var topLevel = tree[0],
participants;
if (is(target, 'bpmn:Collaboration')) {
return every(topLevel, function(e) {
return e.type === 'bpmn:Participant';
});
}
if (is(target, 'bpmn:Process')) {
participants = some(topLevel, function(e) {
return e.type === 'bpmn:Participant';
});
return !(participants && target.children.length > 0);
}
// disallow to create elements on collapsed pools
if (is(target, 'bpmn:Participant') && !isExpanded(target)) {
return false;
}
if (is(target, 'bpmn:FlowElementsContainer')) {
return isExpanded(target);
}
return isAny(target, [
'bpmn:Collaboration',
'bpmn:Lane',
'bpmn:Participant',
'bpmn:Process',
'bpmn:SubProcess' ]);
}
function matches(definition, filter) {
return every(filter, function(val, key) {
// we want a == conversion here, to be able to catch
// undefined == false and friends
/* jshint -W116 */
return definition[key] == val;
});
}