all files / bpmn-js/lib/features/modeling/behavior/ SubProcessBehavior.js

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import inherits from 'inherits';
 
import CommandInterceptor from 'diagram-js/lib/command/CommandInterceptor';
 
import { is } from '../../../util/ModelUtil';
 
import { expandedBounds } from './ToggleElementCollapseBehaviour';
 
 
export default function SubProcessBehavior(elementFactory, eventBus, modeling) {
  CommandInterceptor.call(this, eventBus);
 
  /**
   * Adjust position of sub process after it replaces a shape with incoming
   * sequence flows and no outgoing sequence flows to prevent overlap.
   */
  this.postExecuted('shape.replace', function(event) {
    var oldShape = event.context.oldShape,
        newShape = event.context.newShape;
 
    if (!is(newShape, 'bpmn:SubProcess') ||
      !hasIncomingSequenceFlows(newShape) ||
      hasOutgoingSequenceFlows(newShape)) {
      return;
    }
 
    modeling.moveShape(newShape, {
      x: oldShape.x - newShape.x,
      y: 0
    });
  });
 
  /**
   * Adjust position of sub process with incoming sequence flows and no outgoing
   * sequence flows after toggling to prevent overlap.
   */
  this.postExecuted('shape.toggleCollapse', function(event) {
    var context = event.context,
        shape = context.shape,
        defaultSize = elementFactory._getDefaultSize(shape),
        newBounds;
 
    if (!is(shape, 'bpmn:SubProcess') ||
      shape.collapsed ||
      !hasIncomingSequenceFlows(shape) ||
      hasOutgoingSequenceFlows(shape)) {
      return;
    }
 
    newBounds = expandedBounds(shape, defaultSize);
 
    modeling.moveShape(shape, {
      x: shape.x - newBounds.x,
      y: 0
    });
  });
}
 
SubProcessBehavior.$inject = [
  'elementFactory',
  'eventBus',
  'modeling'
];
 
inherits(SubProcessBehavior, CommandInterceptor);
 
// helpers //////////
 
function hasIncomingSequenceFlows(shape) {
  shape = shape || {};
 
  if (shape.incoming && shape.incoming.length) {
    return shape.incoming.some(isSequenceFlow);
  }
 
  return false;
}
 
function hasOutgoingSequenceFlows(shape) {
  shape = shape || {};
 
  if (shape.outgoing && shape.outgoing.length) {
    return shape.outgoing.some(isSequenceFlow);
  }
 
  return false;
}
 
function isSequenceFlow(connection) {
  return is(connection, 'bpmn:SequenceFlow');
}