# all files / Github/bpmn-js/lib/features/modeling/behavior/ ReplaceElementBehaviour.js

98.04% Statements 50/51
95.45% Branches 21/22
100% Functions 7/7
98.04% Lines 50/51

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    34
    35
    36
    37
    38
    39
    40
    41
    42
    43
    44
    45
    46
    47
    48
    49
    50
    51
    52
    53
    54
    55
    56
    57
    58
    59
    60
    61
    62
    63
    64
    65
    66
    67
    68
    69
    70
    71
    72
    73
    74
    75
    76
    77
    78
    79
    80
    81
    82
    83
    84
    85
    86
    87
    88
    89
    90
    91
    92
    93
    94
    95
    96
    97
    98
    99
    100
    101
    102
    103
    104
    105
    106
    107
    108
    109
    110
    111
    112
    113
    114
    115
    116
    117
    118
    119
    120
    121
    122
    123
    124
    125
    126
    127
    128

    1128×

    1128×
    1128×
    1128×
    1128×

    1128×

    406×
    406×
    406×
    406×

    406×
    564×

    564×

    406×
    17×

    406×

    406×
    18×

    1128×

    137×
    137×
    137×
    137×

    137×
    19×

    19×

    1128×
    137×
    137×
    137×

    137×
    137×

    1×

    1×
    37×
    37×
    37×
    37×

    37×

    21×

    21×

    21×
    2×

    21×

    21×

    21×
    2×

    37×
    20×

    1×

     import inherits from 'inherits';

    import CommandInterceptor from 'diagram-js/lib/command/CommandInterceptor';

    import {
      forEach
    } from 'min-dash';

    import {
      isEventSubProcess
    } from '../../../util/DiUtil';

    import { is } from '../../../util/ModelUtil';

    /**
     * Defines the behaviour of what happens to the elements inside a container
     * that morphs into another BPMN element
     */
    export default function ReplaceElementBehaviour(
        eventBus, bpmnReplace, bpmnRules,
        elementRegistry, selection, modeling) {

      CommandInterceptor.call(this, eventBus);

      this._bpmnReplace = bpmnReplace;
      this._elementRegistry = elementRegistry;
      this._selection = selection;
      this._modeling = modeling;

      this.postExecuted([ 'elements.move' ], 500, function(event) {

        var context = event.context,
            target = context.newParent,
            newHost = context.newHost,
            elements = [];

        forEach(context.closure.topLevel, function(topLevelElements) {
          Iif (isEventSubProcess(topLevelElements)) {
            elements = elements.concat(topLevelElements.children);
          } else {
            elements = elements.concat(topLevelElements);
          }
        });

        // Change target to host when the moving element is a `bpmn:BoundaryEvent`
        if (elements.length === 1 && newHost) {
          target = newHost;
        }

        var canReplace = bpmnRules.canReplace(elements, target);

        if (canReplace) {
          this.replaceElements(elements, canReplace.replacements, newHost);
        }
      }, this);

      // update attachments if the host is replaced
      this.postExecute([ 'shape.replace' ], 1500, function(e) {

        var context = e.context,
            oldShape = context.oldShape,
            newShape = context.newShape,
            attachers = oldShape.attachers,
            canReplace;

        if (attachers && attachers.length) {
          canReplace = bpmnRules.canReplace(attachers, newShape);

          this.replaceElements(attachers, canReplace.replacements);
        }

      }, this);

      this.postExecuted([ 'shape.replace' ], 1500, function(e) {
        var context = e.context,
            oldShape = context.oldShape,
            newShape = context.newShape;

        modeling.unclaimId(oldShape.businessObject.id, oldShape.businessObject);
        modeling.updateProperties(newShape, { id: oldShape.id });
      });
    }

    inherits(ReplaceElementBehaviour, CommandInterceptor);

    ReplaceElementBehaviour.prototype.replaceElements = function(elements, newElements, newHost) {
      var elementRegistry = this._elementRegistry,
          bpmnReplace = this._bpmnReplace,
          selection = this._selection,
          modeling = this._modeling;

      forEach(newElements, function(replacement) {

        var newElement = {
          type: replacement.newElementType
        };

        var oldElement = elementRegistry.get(replacement.oldElementId);

        if (newHost && is(oldElement, 'bpmn:BoundaryEvent')) {
          modeling.updateAttachment(oldElement, null);
        }

        var idx = elements.indexOf(oldElement);

        elements[idx] = bpmnReplace.replaceElement(oldElement, newElement, { select: false });

        if (newHost && is(elements[idx], 'bpmn:BoundaryEvent')) {
          modeling.updateAttachment(elements[idx], newHost);
        }
      });

      if (newElements) {
        selection.select(elements);
      }
    };

    ReplaceElementBehaviour.$inject = [
      'eventBus',
      'bpmnReplace',
      'bpmnRules',
      'elementRegistry',
      'selection',
      'modeling'
    ];