feat: add multi-element delete action

lib/features/context-pad/ContextPadProvider.js

@@ -1,7 +1,8 @@
 import {
   assign,
   forEach,
-  isArray
+  isArray,
+  every
 } from 'min-dash';
 
 import {
@@ -86,9 +87,49 @@ ContextPadProvider.$inject = [
   'translate'
 ];
 
+ContextPadProvider.prototype.getMultiElementContextPadEntries = function(elements) {
+  var modeling = this._modeling;
+
+  var actions = {};
+
+  if (this._isDeleteAllowed(elements)) {
+    assign(actions, {
+      'delete': {
+        group: 'edit',
+        className: 'bpmn-icon-trash',
+        title: this._translate('Remove'),
+        action: {
+          click: function(event, elements) {
+            modeling.removeElements(elements.slice());
+          }
+        }
+      }
+    });
+  }
+
+  return actions;
+};
+
+/**
+ * @param {djs.model.Base[]} elements
+ * @return {boolean}
+ */
+ContextPadProvider.prototype._isDeleteAllowed = function(elements) {
+
+  var baseAllowed = this._rules.allowed('elements.delete', {
+    elements: elements
+  });
+
+  if (isArray(baseAllowed)) {
+    return every(baseAllowed, function(element) {
+      return includes(baseAllowed, element);
+    });
+  }
+
+  return baseAllowed;
+};
 
 ContextPadProvider.prototype.getContextPadEntries = function(element) {
-
   var contextPad = this._contextPad,
       modeling = this._modeling,
 
@@ -113,7 +154,7 @@ ContextPadProvider.prototype.getContextPadEntries = function(element) {
     connect.start(event, element);
   }
 
-  function removeElement(e) {
+  function removeElement(e, element) {
     modeling.removeElements([ element ]);
   }
 
@@ -479,3 +520,7 @@ function isEventType(eventBo, type, definition) {
 
   return isType && isDefinition;
 }
+
+function includes(array, item) {
+  return array.indexOf(item) !== -1;
+}

test/spec/features/context-pad/ContextPadProviderSpec.js

@@ -51,8 +51,8 @@ describe('features - context-pad', function() {
 
     beforeEach(inject(function(contextPad) {
 
-      deleteAction = function(element) {
+      deleteAction = function(target) {
-        return padEntry(contextPad.getPad(element).html, 'delete');
+        return padEntry(contextPad.getPad(target).html, 'delete');
       };
     }));
 
@@ -165,6 +165,65 @@ describe('features - context-pad', function() {
       })
     );
 
+
+    describe('multi-element', function() {
+
+      it('should add delete action by default', inject(
+        function(elementRegistry, contextPad) {
+
+          // given
+          var event = elementRegistry.get('StartEvent_1'),
+              task = elementRegistry.get('Task_1');
+
+          // when
+          contextPad.open([ event, task ]);
+
+          // then
+          expect(deleteAction([ event, task ])).to.exist;
+        }
+      ));
+
+
+      it('should NOT add delete action when rule returns false', inject(
+        function(elementRegistry, contextPad, customRules) {
+
+          // given
+          customRules.addRule('elements.delete', 1500, function() {
+            return false;
+          });
+
+          var event = elementRegistry.get('StartEvent_1'),
+              task = elementRegistry.get('Task_1');
+
+          // when
+          contextPad.open([ event, task ]);
+
+          // then
+          expect(deleteAction([ event, task ])).not.to.exist;
+        }
+      ));
+
+
+      it('should trigger batch delete', inject(
+        function(elementRegistry, contextPad, customRules) {
+
+          // given
+          var event = elementRegistry.get('StartEvent_1'),
+              task = elementRegistry.get('Task_1');
+
+          contextPad.open([ event, task ]);
+
+          // when
+          contextPad.trigger('click', padEvent('delete'));
+
+          // then
+          expect(elementRegistry.get('StartEvent_1')).not.to.exist;
+          expect(elementRegistry.get('Task_1')).not.to.exist;
+        }
+      ));
+
+    });
+
   });