#967 initial support for dynamic components (wip)

- form rendering service to control field-component type mappings
- special <form-field> component with dynamic content creation based on
mapped types
- migrated <text> component to dynamic creation

ng2-components/ng2-activiti-form/src/components/form-field/form-field.component.ts

@@ -0,0 +1,68 @@
+/*!
+ * @license
+ * Copyright 2016 Alfresco Software, Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { Component, OnInit, ViewChild, ViewContainerRef, Input, ComponentRef, ComponentFactoryResolver, Output, EventEmitter/*, Injector*/ } from '@angular/core';
+import { WidgetVisibilityService } from './../../services/widget-visibility.service';
+import { FormRenderingService } from './../../services/form-rendering.service';
+import { WidgetComponent } from './../widgets/widget.component';
+import { FormFieldModel/*, FormWidgetModel*/ } from './../widgets/core/index';
+
+@Component({
+    selector: 'form-field',
+    template: `<div #container></div>`
+})
+export class FormFieldComponent implements OnInit {
+
+    @ViewChild('container', { read: ViewContainerRef })
+    container: ViewContainerRef;
+
+    @Input()
+    field: FormFieldModel = null;
+
+    /** @deprecated component handles visibilty itself */
+    @Output()
+    fieldChanged: EventEmitter<FormFieldModel> = new EventEmitter<FormFieldModel>();
+
+    private componentRef: ComponentRef<{}>;
+
+    constructor(
+        private formRenderingService: FormRenderingService,
+        private componentFactoryResolver: ComponentFactoryResolver,
+        private visibilityService: WidgetVisibilityService
+        /*,private injector: Injector*/) {
+    }
+
+    ngOnInit() {
+        if (this.field) {
+            let componentType = this.formRenderingService.getComponentType(this.field.type);
+            if (componentType) {
+                let factory = this.componentFactoryResolver.resolveComponentFactory(componentType);
+                this.componentRef = this.container.createComponent(factory/*, 0, this.injector*/);
+                let instance = <WidgetComponent>this.componentRef.instance;
+                instance.field = this.field;
+                instance.fieldChanged.subscribe(args => {
+                    if (this.field && this.field.form) {
+                        this.visibilityService.refreshVisibility(this.field.form);
+                    }
+                    /** @deprecated */
+                    this.fieldChanged.emit(args);
+                });
+            }
+        }
+    }
+
+}