feat(modeling): I can morph tasks to expanded sub processes

* from expanded subprocesses to tasks or collapsed sub processes is not supported

Closes #247

lib/features/popup-menu/ReplaceMenuProvider.js

@@ -184,7 +184,9 @@ ReplaceMenuProvider.prototype.getEntries = function(element) {
 
       var isTargetSubProcess = target.type === 'bpmn:SubProcess';
 
-      return isDifferentType(element, target) && !isTargetSubProcess;
+      var isTargetExpanded = target.isExpanded === true;
+
+      return isDifferentType(element, target) && ( !isTargetSubProcess || isTargetExpanded );
     });
 
     return this._createEntries(element, entries);

lib/features/replace/BpmnReplace.js

@@ -52,17 +52,31 @@ function BpmnReplace(bpmnFactory, replace, selection, modeling) {
     // initialize special properties defined in target definition
     assign(newBusinessObject, pick(target, CUSTOM_PROPERTIES));
 
-    // copy size (for activities only)
+    if (is(oldBusinessObject, 'bpmn:SubProcess')) {
-    if (is(oldBusinessObject, 'bpmn:Activity')) {
 
-      // TODO: need also to respect min/max Size
+      newElement.isExpanded = isExpanded(oldBusinessObject);
-
-      newElement.width = element.width;
-      newElement.height = element.height;
     }
 
-    if (is(oldBusinessObject, 'bpmn:SubProcess')) {
+    // preserve adhoc state while switching collapsed/expanded subprocess
-      newElement.isExpanded = isExpanded(oldBusinessObject);
+    if (is(oldBusinessObject, 'bpmn:AdHocSubProcess') && target.isExpanded) {
+      newElement.businessObject = bpmnFactory.create('bpmn:AdHocSubProcess');
+    }
+
+    if (is(oldBusinessObject, 'bpmn:Activity')) {
+
+      // switch collapsed/expanded subprocesses
+      if (target.isExpanded === true) {
+        newElement.isExpanded = true;
+      }
+
+      // TODO: need also to respect min/max Size
+      // copy size, from an expanded subprocess to an expanded alternative subprocess
+      // except bpmn:Task, because Task is always expanded
+      if ((isExpanded(oldBusinessObject) && !is(oldBusinessObject, 'bpmn:Task')) && target.isExpanded) {
+        newElement.width = element.width;
+        newElement.height = element.height;
+      }
+
     }
 
     // transform collapsed/expanded pools

lib/features/replace/ReplaceOptions.js

@@ -484,6 +484,15 @@ module.exports.TASK = [
       type: 'bpmn:SubProcess',
       isExpanded: false
     }
+  },
+  {
+    label: 'Sub Process (expanded)',
+    actionName: 'replace-with-expanded-subprocess',
+    className: 'bpmn-icon-subprocess-expanded',
+    target: {
+      type: 'bpmn:SubProcess',
+      isExpanded: true
+    }
   }
 ];
 

test/spec/features/replace/BpmnReplaceSpec.js

@@ -772,6 +772,86 @@ describe('features/replace - bpmn replace', function() {
 
   });
 
+  describe('morphing collapsed tasks / sub processes into expanded sub processes', function() {
+
+    var diagramXML = require('../../../fixtures/bpmn/features/replace/01_replace.bpmn');
+
+    beforeEach(bootstrapModeler(diagramXML, { modules: testModules }));
+
+
+    it('should allow morphing task into expanded sub process', inject(function(bpmnReplace, elementRegistry) {
+
+      // given
+      var element = elementRegistry.get('Task_1');
+      var newElementData = {
+        type: 'bpmn:SubProcess',
+        isExpanded: true
+      };
+
+      // when
+      var newElement = bpmnReplace.replaceElement(element, newElementData);
+
+      // then
+      expect(is(newElement, 'bpmn:SubProcess')).to.be.true;
+      expect(isExpanded(newElement)).to.be.true;
+    }));
+
+
+    it('should allow morphing collapsed sup process into expanded sub process', inject(function(bpmnReplace, elementRegistry) {
+
+      // given
+      var element = elementRegistry.get('SubProcessCollapsed');
+      var newElementData = {
+        type: 'bpmn:SubProcess',
+        isExpanded: true
+      };
+
+      // when
+      var newElement = bpmnReplace.replaceElement(element, newElementData);
+
+      // then
+      expect(is(newElement, 'bpmn:SubProcess')).to.be.true;
+      expect(isExpanded(newElement)).to.be.true;
+    }));
+
+
+    it('should allow morphing collapsed ad hoc into expanded ad hoc', inject(function(bpmnReplace, elementRegistry) {
+
+      // given
+      var element = elementRegistry.get('AdHocSubProcessCollapsed');
+      var newElementData = {
+        type: 'bpmn:SubProcess',
+        isExpanded: true
+      };
+
+      // when
+      var newElement = bpmnReplace.replaceElement(element, newElementData);
+
+      // then
+      expect(is(newElement, 'bpmn:AdHocSubProcess')).to.be.true;
+      expect(isExpanded(newElement)).to.be.true;
+    }));
+
+
+    it('should keep boundary events', inject(function(bpmnReplace, elementRegistry) {
+
+      // given
+      var element = elementRegistry.get('Task_1');
+      var newElementData = {
+        type: 'bpmn:SubProcess',
+        isExpanded: true
+      };
+
+      // when
+      var newElement = bpmnReplace.replaceElement(element, newElementData);
+
+      // then
+      expect(is(newElement, 'bpmn:SubProcess')).to.be.true;
+      expect(isExpanded(newElement)).to.be.true;
+      expect(newElement.attachers.length).to.be.equal(2);
+    }));
+
+  });
 
   describe('compensation activity', function() {