feat: support element templates runtime versions

  Config for current runtime platform and version can now be passed to elementTemplates. If template has information about supported engines, compatibility will be verified.

  Related to camunda/camunda-modeler#4530

feat: emit <changed> as part of <set>

  This allows us to safely use <set> to reflect internal changes.

package.json

@@ -68,6 +68,7 @@
     "min-dash": "^4.0.0",
     "min-dom": "^4.0.3",
     "preact-markup": "^2.1.1",
+    "semver": "^7.6.3",
     "semver-compare": "^1.0.0",
     "uuid": "^11.0.0"
   },

src/cloud-element-templates/ElementTemplates.js

@@ -9,8 +9,8 @@ import { default as DefaultElementTemplates } from '../element-templates/Element
  * Registry for element templates.
  */
 export default class ElementTemplates extends DefaultElementTemplates {
-  constructor(templateElementFactory, commandStack, eventBus, modeling, injector) {
-    super(commandStack, eventBus, modeling, injector);
+  constructor(templateElementFactory, commandStack, eventBus, modeling, injector, config) {
+    super(commandStack, eventBus, modeling, injector, config);
 
     this._templateElementFactory = templateElementFactory;
   }
@@ -75,12 +75,14 @@ export default class ElementTemplates extends DefaultElementTemplates {
 
     return context.element;
   }
+
 }
 
 ElementTemplates.$inject = [
   'templateElementFactory',
   'commandStack',
   'eventBus',
   'modeling',
-  'injector'
+  'injector',
+  'config.elementTemplates',
 ];

src/cloud-element-templates/ElementTemplatesLoader.js

@@ -28,10 +28,8 @@ export default class ElementTemplatesLoader extends TemplatesLoader {
     elementTemplates.set(validTemplates);
 
     if (errors.length) {
-      this.templateErrors(errors);
+      this._templateErrors(errors);
     }
-
-    this.templatesChanged();
   }
 }