Code improvements

- shared global declarations
- reduced hyperlink-related repetitive code

ng2-components/ng2-activiti-form/src/components/widgets/widget.component.ts

@@ -18,14 +18,14 @@
 import { Input, AfterViewInit, Output, EventEmitter } from '@angular/core';
 import { FormFieldModel } from './core/index';
 
-declare let __moduleName: string;
-declare var componentHandler;
-
 /**
  * Base widget component.
  */
 export class WidgetComponent implements AfterViewInit {
 
+    static DEFAULT_HYPERLINK_URL: string = '#';
+    static DEFAULT_HYPERLINK_SCHEME: string = 'http://';
+
     @Input()
     field: FormFieldModel;
 
@@ -67,4 +67,22 @@ export class WidgetComponent implements AfterViewInit {
         this.fieldChanged.emit(field);
     }
 
+    protected getHyperlinkUrl(field: FormFieldModel) {
+        let url = WidgetComponent.DEFAULT_HYPERLINK_URL;
+        if (field && field.hyperlinkUrl) {
+            url = field.hyperlinkUrl;
+            if (!/^https?:\/\//i.test(url)) {
+                url = `${WidgetComponent.DEFAULT_HYPERLINK_SCHEME}${url}`;
+            }
+        }
+        return url;
+    }
+
+    protected getHyperlinkText(field: FormFieldModel) {
+        if (field) {
+            return field.displayText || field.hyperlinkUrl;
+        }
+        return null;
+    }
+
 }