diff --git a/.tmp/ar-overlay-position.ts b/.tmp/ar-overlay-position.ts
new file mode 100644
index 000000000..f91f888e2
--- /dev/null
+++ b/.tmp/ar-overlay-position.ts
@@ -0,0 +1,121 @@
+import {ConnectedPosition} from '@angular/cdk/overlay';
+import {isArray} from 'rxjs/internal-compatibility';
+
+export declare type Placement = 'auto' | 'top' | 'bottom' | 'left' | 'right' | 'top-left' | 'top-right' | 'bottom-left' | 'bottom-right' | 'left-top' | 'left-bottom' | 'right-top' | 'right-bottom';
+export declare type PlacementArray = Placement | Array<Placement>;
+
+export class ArOverlayPosition {
+
+  private static readonly _offsetYVal = 7;
+
+  public static TOP_LEFT: ConnectedPosition = {
+    originX: 'end',
+    originY: 'top',
+    overlayX: 'end',
+    overlayY: 'bottom',
+    offsetY: -ArOverlayPosition._offsetYVal
+  };
+
+  public static TOP_RIGHT: ConnectedPosition = {
+    originX: 'start',
+    originY: 'top',
+    overlayX: 'start',
+    overlayY: 'bottom',
+    offsetY: -ArOverlayPosition._offsetYVal
+  };
+
+  public static BOTTOM_LEFT: ConnectedPosition = {
+    originX: 'end',
+    originY: 'bottom',
+    overlayX: 'end',
+    overlayY: 'top',
+    offsetY: ArOverlayPosition._offsetYVal
+  };
+
+  public static BOTTOM_RIGHT: ConnectedPosition = {
+    originX: 'start',
+    originY: 'bottom',
+    overlayX: 'start',
+    overlayY: 'top',
+    offsetY: ArOverlayPosition._offsetYVal
+  };
+
+  public static LEFT_TOP: ConnectedPosition = {
+    originX: 'start',
+    originY: 'top',
+    overlayX: 'end',
+    overlayY: 'top',
+    offsetX: -ArOverlayPosition._offsetYVal
+  };
+
+  public static LEFT_BOTTOM: ConnectedPosition = {
+    originX: 'start',
+    originY: 'bottom',
+    overlayX: 'end',
+    overlayY: 'bottom',
+    offsetX: -ArOverlayPosition._offsetYVal
+  };
+
+  public static RIGHT_TOP: ConnectedPosition = {
+    originX: 'end',
+    originY: 'top',
+    overlayX: 'start',
+    overlayY: 'top',
+    offsetX: ArOverlayPosition._offsetYVal
+  };
+
+  public static RIGHT_BOTTOM: ConnectedPosition = {
+    originX: 'end',
+    originY: 'bottom',
+    overlayX: 'start',
+    overlayY: 'bottom',
+    offsetX: ArOverlayPosition._offsetYVal
+  };
+
+  public static getConnectedPosition(position: PlacementArray): ConnectedPosition[] {
+    if (isArray(position)) {
+      return Array.from(position).map(pos => this.getPosition(pos as Placement));
+    } else if (position === 'auto') {
+      return this.getAutoPosition();
+    } else {
+      return [this.getPosition(position as Placement)];
+    }
+  }
+
+  private static getPosition(position: Placement) {
+    switch (position) {
+      case 'top':
+        return ArOverlayPosition.TOP_RIGHT;
+      case 'bottom':
+        return ArOverlayPosition.BOTTOM_RIGHT;
+      case 'left':
+        return ArOverlayPosition.LEFT_TOP;
+      case 'right':
+        return ArOverlayPosition.RIGHT_TOP;
+      case 'top-left':
+        return ArOverlayPosition.TOP_LEFT;
+      case 'top-right':
+        return ArOverlayPosition.TOP_RIGHT;
+      case 'bottom-left':
+        return ArOverlayPosition.BOTTOM_LEFT;
+      case 'bottom-right':
+        return ArOverlayPosition.BOTTOM_RIGHT;
+      case 'left-top':
+        return ArOverlayPosition.LEFT_TOP;
+      case 'left-bottom':
+        return ArOverlayPosition.LEFT_BOTTOM;
+      case 'right-top':
+        return ArOverlayPosition.RIGHT_TOP;
+      case 'right-bottom':
+        return ArOverlayPosition.RIGHT_BOTTOM;
+    }
+  }
+
+  private static getAutoPosition(): ConnectedPosition[] {
+    return [ArOverlayPosition.TOP_LEFT, ArOverlayPosition.TOP_RIGHT,
+      ArOverlayPosition.BOTTOM_LEFT, ArOverlayPosition.BOTTOM_RIGHT,
+      ArOverlayPosition.LEFT_TOP, ArOverlayPosition.LEFT_BOTTOM,
+      ArOverlayPosition.RIGHT_TOP, ArOverlayPosition.RIGHT_BOTTOM
+    ];
+  }
+}