[Layout] Support sub-object selection in layout (#1811)

Updates to sub object selection, first cut of selection APIs.

* [API] Add inspector view registry to register inspector view providers and show a view in the inspector.

[API] Modify the selection API to register the click event and handle the event. The API will add a class to the selected object and the immediate parent of the selected object.

[Directive] Implemenet mct-selectable directive for making an element selectable.

[Layout] Update the layout controller to use the Selection API. Also, add double click gesture to allow drilling into a selected object.

Populate the Elements pool with contained elements of the selected object. Update toolbar and inspector to listen for the changes in selection.

* [Frontend] Mods to markup and CSS for sub-object selection

* MCTSelectable allows selection in initialization, use to select on navigation

[Frontend] Show grid in first nested layout, hide from deeper nesting. Only show grids when applicable to relative selection.

* Fix checkstyle and lint errors

* Bring back the change that made mct-init-select work

* [Inspector] Make sure the right content is displayed based on whether a view provider exists or not.

* Only show table options when editing

* Make reviewers' requested changes

* Fix broken tests

* [Frontend] Cleanups and tweaks

Fixes #1811
- Cleanups between frame, editor and selecting.scss;
- Hover and selected borders visually pumped up a bit;
- Solid borders on hover and selecting when browsing;
- Dashed borders for layouts when editing;
- Fixed cursor to only show move capability when
element is selected;

* [Frontend] Tweaks to frame.no-frame layout

Fixes #1811
- Margin set to 0;
- Overflow set to hidden;

* [Frontend] Fixed position items border width fixed

Fixes #1811
- Set to 1px;

* Add tests for inspector controller and fix broken tests. Clean up code.

* [Fixed Position] Stop event propagation on click handlers in fixed position to avoid the event reaching the selection click handlers which caused issues with toolbar and selection."

* Fix tests

* Add tests

* Add test

* Remove element from document

platform/features/layout/res/templates/fixed.html

@@ -40,7 +40,7 @@
             's-selected': controller.selected(element)
          }"
          ng-style="element.style"
-         ng-click="controller.select(element)">
+         ng-click="controller.select(element, $event)">
         <mct-include key="element.template"
                      parameters="{ gridSize: controller.getGridSize() }"
                      ng-model="element">
@@ -53,14 +53,16 @@
              mct-drag-down="controller.moveHandle().startDrag(controller.selected())"
              mct-drag="controller.moveHandle().continueDrag(delta)"
              mct-drag-up="controller.moveHandle().endDrag()"
-             ng-style="controller.selected().style">
+             ng-style="controller.selected().style"
+             ng-click="$event.stopPropagation()">
         </div>
         <div ng-repeat="handle in controller.handles()"
              class="l-fixed-position-item-handle edit-corner"
              ng-style="handle.style()"
              mct-drag-down="handle.startDrag()"
              mct-drag="handle.continueDrag(delta)"
-             mct-drag-up="handle.endDrag()">
+             mct-drag-up="handle.endDrag()"
+             ng-click="$event.stopPropagation()">
         </div>
     </span>
 

platform/features/layout/res/templates/layout.html

@@ -22,10 +22,12 @@
 
 <div class="abs l-layout"
      ng-controller="LayoutController as controller"
-     ng-click="controller.clearSelection()">
+     ng-click="controller.bypassSelection($event)">
 
     <!-- Background grid -->
-    <div class="l-grid-holder" ng-click="controller.clearSelection()">
+    <div class="l-grid-holder"
+         ng-show="!controller.drilledIn"
+         ng-click="controller.bypassSelection($event)">
         <div class="l-grid l-grid-x"
              ng-if="!controller.getGridSize()[0] < 3"
              ng-style="{ 'background-size': controller.getGridSize() [0] + 'px 100%' }"></div>
@@ -34,10 +36,12 @@
              ng-style="{ 'background-size': '100% ' + controller.getGridSize() [1] + 'px' }"></div>
     </div>
 
-    <div class='abs frame t-frame-outer child-frame panel s-selectable s-moveable s-hover-border'
-         ng-class="{ 'no-frame': !controller.hasFrame(childObject), 's-selected':controller.selected(childObject) }"
+    <div class="abs frame t-frame-outer child-frame panel s-selectable s-moveable s-hover-border {{childObject.getId() + '-' + $id}} t-object-type-{{ childObject.getModel().type }}"
+         ng-class="{ 'no-frame': !controller.hasFrame(childObject), 's-drilled-in': controller.isDrilledIn(childObject) }"
          ng-repeat="childObject in composition"
-         ng-click="controller.select($event, childObject.getId())"
+         ng-init="controller.selectIfNew(childObject.getId() + '-' + $id, childObject)"
+         mct-selectable="controller.getContext(childObject, true)"
+         ng-dblclick="controller.drill($event, childObject)"
          ng-style="controller.getFrameStyle(childObject.getId())">
 
         <mct-representation key="'frame'"
@@ -45,7 +49,7 @@
                             mct-object="childObject">
         </mct-representation>
         <!-- Drag handles -->
-        <span class="abs t-edit-handle-holder s-hover-border" ng-if="controller.selected(childObject)">
+        <span class="abs t-edit-handle-holder" ng-if="controller.selected(childObject) && !controller.isDrilledIn(childObject)">
             <span class="edit-handle edit-move"
                   mct-drag-down="controller.startDrag(childObject.getId(), [1,1], [0,0])"
                   mct-drag="controller.continueDrag(delta)"
@@ -73,7 +77,6 @@
                   mct-drag-up="controller.endDrag()">
             </span>
         </span>
-
     </div>
 
 </div>