Timeline: start/due dates can't be moved after/before each other

frontend/app/components/wp-table/timeline/cell-renderer/timeline-cell-renderer.ts

@@ -42,7 +42,7 @@ export class TimelineCellRenderer {
    * Handle movement by <delta> days of the work package to either (or both) edge(s)
    * depending on which initial date was set.
    */
-  public onDaysMoved(wp:WorkPackageResourceInterface, delta:number) {
+  public onDaysMoved(wp: WorkPackageResourceInterface, delta: number): CellDateMovement {
     const initialStartDate = wp.$pristine['startDate'];
     const initialDueDate = wp.$pristine['dueDate'];
     let dates:CellDateMovement = {};
@@ -55,6 +55,15 @@ export class TimelineCellRenderer {
       dates.dueDate = moment(initialDueDate).add(delta, "days");
     }
 
+    // only start or due are changed
+    if (_.keys(dates).length === 1) {
+      if (dates.startDate != undefined && dates.startDate.isAfter(moment(wp.dueDate))) {
+        dates.startDate = moment(wp.dueDate);
+      } else if (dates.dueDate != undefined && dates.dueDate.isBefore(moment(wp.startDate))) {
+        dates.dueDate = moment(wp.startDate);
+      }
+    }
+
     return dates;
   }
 

frontend/app/components/wp-table/timeline/wp-timeline-cell-mouse-handler.ts

@@ -27,12 +27,12 @@
 // ++
 import {timelineElementCssClass, RenderInfo} from "./wp-timeline";
 import {WorkPackageCacheService} from "../../work-packages/work-package-cache.service";
+import {WorkPackageTimelineTableController} from "./wp-timeline-container.directive";
+import {TimelineCellRenderer} from "./cell-renderer/timeline-cell-renderer";
 import IScope = angular.IScope;
 import Observable = Rx.Observable;
 import IDisposable = Rx.IDisposable;
 import Moment = moment.Moment;
-import {WorkPackageTimelineTableController} from "./wp-timeline-container.directive";
-import {TimelineCellRenderer} from './cell-renderer/timeline-cell-renderer';
 
 const classNameBar = "bar";
 const classNameLeftHandle = "leftHandle";