improve(resize): allow to set minimum size for element

lib/features/resize/BpmnMinimumSizes.js

@@ -0,0 +1,24 @@
+module.exports = {
+  'bpmn:Task': {
+    'height': 40,
+    'width':  40
+  },
+  'bpmn:SubProcess': {
+    'resolver': function(element) {
+
+      var isExpanded = element.businessObject.di.isExpanded;
+
+      if (isExpanded) {
+        return {
+          'height': 100,
+          'width':  100
+        };
+      } else {
+        return {
+          'height': 40,
+          'width':  40
+        };
+      }
+    }
+  }
+};

lib/features/resize/BpmnResizeHandler.js

@@ -2,12 +2,13 @@
 
 var _ = require('lodash');
 
-var resizableElements = require('./BpmnResizableElements.json').elements;
+var resizableElements = require('./BpmnResizableElements.json').elements,
+    minimumSize       = require('./BpmnMinimumSizes.js');
 
 
 function BpmnResizeHandler(eventBus, resize) {
 
-  var isResizeAllowed = function(element) {
+  var isResizeAllowed = function isResizeAllowed(element) {
     var isAllowed = _.contains(resizableElements, element.type);
 
     if (isAllowed) {
@@ -17,9 +18,27 @@ function BpmnResizeHandler(eventBus, resize) {
     }
   };
 
+  var getMinimumSize =  function getMinimumSize(element) {
+    var size = minimumSize[element.type];
+
+    if (!size) {
+      size = {
+        height: 30,
+        width:  30
+      };
+    }
+
+    if (!!size.resolver) {
+      return size.resolver(element);
+    } else {
+      return size;
+    }
+  };
+
   // Register Handler
   eventBus.on('canvas.init', function() {
     resize.registerResizableHandler(isResizeAllowed);
+    resize.registerMinimumSizeResolver(getMinimumSize);
   });
 }
 

test/spec/features/palette/BpmnPaletteProviderSpec.js

@@ -32,7 +32,7 @@ describe('palette', function() {
     });
   }
 
-  iit('should should draw palette', function(done) {
+  it('should should draw palette', function(done) {
 
     var modeler = new Modeler({ container: container });
     modeler.createDiagram(function(err) {