feat(space-tool): ensure minimum size when resizing shapes

lib/features/modeling/behavior/ResizeBehavior.js

@@ -6,9 +6,11 @@ import { getParticipantResizeConstraints } from './util/ResizeUtil';
 
 var HIGH_PRIORITY = 1500;
 
-var PARTICIPANT_MIN_DIMENSIONS = { width: 300, height: 150 },
-    SUB_PROCESS_MIN_DIMENSIONS = { width: 140, height: 120 },
-    TEXT_ANNOTATION_MIN_DIMENSIONS = { width: 50, height: 30 };
+export var PARTICIPANT_MIN_DIMENSIONS = { width: 300, height: 150 };
+
+export var SUB_PROCESS_MIN_DIMENSIONS = { width: 140, height: 120 };
+
+export var TEXT_ANNOTATION_MIN_DIMENSIONS = { width: 50, height: 30 };
 
 
 /**

lib/features/modeling/behavior/SpaceToolBehavior.js

@@ -0,0 +1,36 @@
+import { forEach } from 'min-dash';
+
+import { is } from '../../../util/ModelUtil';
+
+import { isExpanded } from '../../../util/DiUtil';
+
+import {
+  PARTICIPANT_MIN_DIMENSIONS,
+  SUB_PROCESS_MIN_DIMENSIONS,
+  TEXT_ANNOTATION_MIN_DIMENSIONS
+} from './ResizeBehavior';
+
+export default function SpaceToolBehavior(eventBus) {
+  eventBus.on('spaceTool.getMinDimensions', function(context) {
+    var shapes = context.shapes,
+        minDimensions = {};
+
+    forEach(shapes, function(shape) {
+      var id = shape.id;
+
+      if (is(shape, 'bpmn:Participant')) {
+        minDimensions[ id ] = PARTICIPANT_MIN_DIMENSIONS;
+      }
+
+      if (is(shape, 'bpmn:SubProcess') && isExpanded(shape)) {
+        minDimensions[ id ] = SUB_PROCESS_MIN_DIMENSIONS;
+      }
+
+      if (is(shape, 'bpmn:TextAnnotation')) {
+        minDimensions[ id ] = TEXT_ANNOTATION_MIN_DIMENSIONS;
+      }
+    });
+
+    return minDimensions;
+  });
+}

lib/features/modeling/behavior/index.js

@@ -25,6 +25,7 @@ import ReplaceElementBehaviour from './ReplaceElementBehaviour';
 import ResizeBehavior from './ResizeBehavior';
 import ResizeLaneBehavior from './ResizeLaneBehavior';
 import RemoveElementBehavior from './RemoveElementBehavior';
+import SpaceToolBehavior from './SpaceToolBehavior';
 import SubProcessStartEventBehavior from './SubProcessStartEventBehavior';
 import ToggleElementCollapseBehaviour from './ToggleElementCollapseBehaviour';
 import UnclaimIdBehavior from './UnclaimIdBehavior';
@@ -61,6 +62,7 @@ export default {
     'resizeBehavior',
     'resizeLaneBehavior',
     'toggleElementCollapseBehaviour',
+    'spaceToolBehavior',
     'subProcessStartEventBehavior',
     'unclaimIdBehavior',
     'unsetDefaultFlowBehavior',
@@ -94,6 +96,7 @@ export default {
   resizeLaneBehavior: [ 'type', ResizeLaneBehavior ],
   removeElementBehavior: [ 'type', RemoveElementBehavior ],
   toggleElementCollapseBehaviour : [ 'type', ToggleElementCollapseBehaviour ],
+  spaceToolBehavior: [ 'type', SpaceToolBehavior ],
   subProcessStartEventBehavior: [ 'type', SubProcessStartEventBehavior ],
   unclaimIdBehavior: [ 'type', UnclaimIdBehavior ],
   updateFlowNodeRefsBehavior: [ 'type', UpdateFlowNodeRefsBehavior ],

test/spec/features/modeling/behavior/SpaceToolBehaviorSpec.bpmn

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<bpmn:definitions xmlns:bpmn="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:dc="http://www.omg.org/spec/DD/20100524/DC" id="Definitions_1ev9p7s" targetNamespace="http://bpmn.io/schema/bpmn" exporter="Camunda Modeler" exporterVersion="3.5.0">
+  <bpmn:process id="Process_1msk4wr" isExecutable="true">
+    <bpmn:subProcess id="SubProcess_1" />
+  </bpmn:process>
+  <bpmndi:BPMNDiagram id="BPMNDiagram_1">
+    <bpmndi:BPMNPlane id="BPMNPlane_1" bpmnElement="Process_1msk4wr">
+      <bpmndi:BPMNShape id="SubProcess_04mmoqh_di" bpmnElement="SubProcess_1" isExpanded="true">
+        <dc:Bounds x="0" y="0" width="350" height="200" />
+      </bpmndi:BPMNShape>
+    </bpmndi:BPMNPlane>
+  </bpmndi:BPMNDiagram>
+</bpmn:definitions>

test/spec/features/modeling/behavior/SpaceToolBehaviorSpec.js

@@ -0,0 +1,60 @@
+import {
+  bootstrapModeler,
+  inject
+} from 'test/TestHelper';
+
+import coreModule from 'lib/core';
+import modelingModule from 'lib/features/modeling';
+import rulesModule from 'lib/features/rules';
+import snappingModule from 'lib/features/snapping';
+import spaceToolModule from 'diagram-js/lib/features/space-tool';
+
+import {
+  createCanvasEvent as canvasEvent
+} from '../../../../util/MockEvents';
+
+import { SUB_PROCESS_MIN_DIMENSIONS } from 'lib/features/modeling/behavior/ResizeBehavior';
+
+var testModules = [
+  coreModule,
+  modelingModule,
+  rulesModule,
+  snappingModule,
+  spaceToolModule
+];
+
+
+describe('features/modeling - space tool behavior', function() {
+
+  describe('participant', function() {
+
+    describe('minimum dimensions', function() {
+
+      var diagramXML = require('./SpaceToolBehaviorSpec.bpmn');
+
+      beforeEach(bootstrapModeler(diagramXML, { modules: testModules }));
+
+
+      it('should ensure minimum dimensions', inject(
+        function(dragging, elementRegistry, spaceTool) {
+
+          // given
+          var subProcess = elementRegistry.get('SubProcess_1');
+
+          // when
+          spaceTool.activateMakeSpace(canvasEvent({ x: 300, y: 0 }));
+
+          dragging.move(canvasEvent({ x: 0, y: 0 }));
+
+          dragging.end();
+
+          // then
+          expect(subProcess.width).to.equal(SUB_PROCESS_MIN_DIMENSIONS.width);
+        })
+      );
+
+    });
+
+  });
+
+});