Bug 1408341 - Implement assignedSlot on Element and Text. r=smaug

dom/base/FragmentOrElement.cpp

@@ -125,6 +125,7 @@
 #include "mozilla/CORSMode.h"
 
 #include "mozilla/dom/ShadowRoot.h"
+#include "mozilla/dom/HTMLSlotElement.h"
 #include "mozilla/dom/HTMLTemplateElement.h"
 #include "mozilla/dom/SVGUseElement.h"
 
@@ -698,6 +699,9 @@ FragmentOrElement::nsDOMSlots::Traverse(nsCycleCollectionTraversalCallback &cb)
   NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mExtendedSlots->mContainingShadow");
   cb.NoteXPCOMChild(NS_ISUPPORTS_CAST(nsIContent*, mExtendedSlots->mContainingShadow));
 
+  NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mExtendedSlots->mAssignedSlot");
+  cb.NoteXPCOMChild(NS_ISUPPORTS_CAST(nsIContent*, mExtendedSlots->mAssignedSlot.get()));
+
   NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mExtendedSlots->mXBLBinding");
   cb.NoteNativeChild(mExtendedSlots->mXBLBinding,
                      NS_CYCLE_COLLECTION_PARTICIPANT(nsXBLBinding));
@@ -745,6 +749,7 @@ FragmentOrElement::nsDOMSlots::Unlink()
   mExtendedSlots->mLabelsList = nullptr;
   mExtendedSlots->mShadowRoot = nullptr;
   mExtendedSlots->mContainingShadow = nullptr;
+  mExtendedSlots->mAssignedSlot = nullptr;
   MOZ_ASSERT(!(mExtendedSlots->mXBLBinding));
   mExtendedSlots->mXBLInsertionParent = nullptr;
   if (mExtendedSlots->mCustomElementData) {
@@ -1215,6 +1220,20 @@ FragmentOrElement::GetExistingDestInsertionPoints() const
   return nullptr;
 }
 
+HTMLSlotElement*
+FragmentOrElement::GetAssignedSlot() const
+{
+  nsExtendedDOMSlots* slots = GetExistingExtendedDOMSlots();
+  return slots ? slots->mAssignedSlot.get() : nullptr;
+}
+
+void
+FragmentOrElement::SetAssignedSlot(HTMLSlotElement* aSlot)
+{
+  nsExtendedDOMSlots* slots = ExtendedDOMSlots();
+  slots->mAssignedSlot = aSlot;
+}
+
 void
 FragmentOrElement::SetXBLInsertionParent(nsIContent* aContent)
 {

dom/base/FragmentOrElement.h

@@ -155,6 +155,8 @@ public:
   virtual nsTArray<nsIContent*> &DestInsertionPoints() override;
   virtual nsTArray<nsIContent*> *GetExistingDestInsertionPoints() const override;
   virtual void SetShadowRoot(ShadowRoot* aBinding) override;
+  virtual mozilla::dom::HTMLSlotElement* GetAssignedSlot() const override;
+  virtual void SetAssignedSlot(mozilla::dom::HTMLSlotElement* aSlot) override;
   virtual nsIContent *GetXBLInsertionParent() const override;
   virtual void SetXBLInsertionParent(nsIContent* aContent) override;
   virtual bool IsLink(nsIURI** aURI) const override;
@@ -297,6 +299,11 @@ public:
      */
     nsTArray<nsIContent*> mDestInsertionPoints;
 
+    /**
+     * The assigned slot associated with this element.
+     */
+    RefPtr<mozilla::dom::HTMLSlotElement> mAssignedSlot;
+
     /**
      * XBL binding installed on the element.
      */

dom/base/nsGenericDOMDataNode.cpp

@@ -15,6 +15,7 @@
 #include "mozilla/AsyncEventDispatcher.h"
 #include "mozilla/MemoryReporting.h"
 #include "mozilla/dom/Element.h"
+#include "mozilla/dom/HTMLSlotElement.h"
 #include "mozilla/dom/ShadowRoot.h"
 #include "nsIDocument.h"
 #include "nsIDOMDocument.h"
@@ -739,6 +740,20 @@ nsGenericDOMDataNode::GetExistingDestInsertionPoints() const
   return nullptr;
 }
 
+HTMLSlotElement*
+nsGenericDOMDataNode::GetAssignedSlot() const
+{
+  nsDataSlots *slots = GetExistingDataSlots();
+  return slots ? slots->mAssignedSlot.get() : nullptr;
+}
+
+void
+nsGenericDOMDataNode::SetAssignedSlot(HTMLSlotElement* aSlot)
+{
+  nsDataSlots *slots = DataSlots();
+  slots->mAssignedSlot = aSlot;
+}
+
 nsXBLBinding *
 nsGenericDOMDataNode::GetXBLBinding() const
 {
@@ -829,6 +844,9 @@ nsGenericDOMDataNode::nsDataSlots::Traverse(nsCycleCollectionTraversalCallback &
 
   NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mSlots->mContainingShadow");
   cb.NoteXPCOMChild(NS_ISUPPORTS_CAST(nsIContent*, mContainingShadow));
+
+  NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mSlots->mAssignedSlot");
+  cb.NoteXPCOMChild(NS_ISUPPORTS_CAST(nsIContent*, mAssignedSlot.get()));
 }
 
 void
@@ -836,6 +854,7 @@ nsGenericDOMDataNode::nsDataSlots::Unlink()
 {
   mXBLInsertionParent = nullptr;
   mContainingShadow = nullptr;
+  mAssignedSlot = nullptr;
 }
 
 //----------------------------------------------------------------------

dom/base/nsGenericDOMDataNode.h

@@ -26,6 +26,12 @@
 class nsIDocument;
 class nsIDOMText;
 
+namespace mozilla {
+namespace dom {
+class HTMLSlotElement;
+} // namespace dom
+} // namespace mozilla
+
 #define DATA_NODE_FLAG_BIT(n_) NODE_FLAG_BIT(NODE_TYPE_SPECIFIC_BITS_OFFSET + (n_))
 
 // Data node specific flags
@@ -170,6 +176,8 @@ public:
   virtual nsTArray<nsIContent*> &DestInsertionPoints() override;
   virtual nsTArray<nsIContent*> *GetExistingDestInsertionPoints() const override;
   virtual void SetShadowRoot(mozilla::dom::ShadowRoot* aShadowRoot) override;
+  virtual mozilla::dom::HTMLSlotElement* GetAssignedSlot() const override;
+  virtual void SetAssignedSlot(mozilla::dom::HTMLSlotElement* aSlot) override;
   virtual nsIContent *GetXBLInsertionParent() const override;
   virtual void SetXBLInsertionParent(nsIContent* aContent) override;
   virtual bool IsNodeOfType(uint32_t aFlags) const override;
@@ -283,6 +291,11 @@ protected:
      * @see nsIContent::GetDestInsertionPoints
      */
     nsTArray<nsIContent*> mDestInsertionPoints;
+
+    /**
+     * @see nsIContent::GetAssignedSlot
+     */
+    RefPtr<mozilla::dom::HTMLSlotElement> mAssignedSlot;
   };
 
   // Override from nsINode

dom/base/nsIContent.h

@@ -28,6 +28,7 @@ class EventChainPreVisitor;
 struct URLExtraData;
 namespace dom {
 class ShadowRoot;
+class HTMLSlotElement;
 } // namespace dom
 namespace widget {
 struct IMEState;
@@ -743,6 +744,20 @@ public:
    */
   virtual nsTArray<nsIContent*> *GetExistingDestInsertionPoints() const = 0;
 
+  /**
+   * Gets the assigned slot associated with this content.
+   *
+   * @return The assigned slot element or null.
+   */
+  virtual mozilla::dom::HTMLSlotElement* GetAssignedSlot() const = 0;
+
+  /**
+   * Sets the assigned slot associated with this content.
+   *
+   * @param aSlot The assigned slot.
+   */
+  virtual void SetAssignedSlot(mozilla::dom::HTMLSlotElement* aSlot) = 0;
+
   /**
    * Gets the insertion parent element of the XBL binding.
    * The insertion parent is our one true parent in the transformed DOM.

dom/webidl/Element.webidl

@@ -243,6 +243,8 @@ partial interface Element {
   NodeList getDestinationInsertionPoints();
   [Pref="dom.webcomponents.enabled"]
   readonly attribute ShadowRoot? shadowRoot;
+  [Pref="dom.webcomponents.enabled"]
+  readonly attribute HTMLSlotElement? assignedSlot;
 };
 
 Element implements ChildNode;

dom/webidl/Text.webidl

@@ -18,4 +18,9 @@ interface Text : CharacterData {
   readonly attribute DOMString wholeText;
 };
 
+partial interface Text {
+  [Pref="dom.webcomponents.enabled"]
+  readonly attribute HTMLSlotElement? assignedSlot;
+};
+
 Text implements GeometryUtils;

testing/web-platform/meta/dom/interfaces.html.ini

@@ -1,5 +1,6 @@
 [interfaces.html]
   type: testharness
+  prefs: [dom.webcomponents.enabled:true]
   [Document interface: attribute origin]
     expected: FAIL
     bug: 931884
@@ -24,9 +25,6 @@
   [Element interface: operation attachShadow(ShadowRootInit)]
     expected: FAIL
 
-  [Element interface: attribute assignedSlot]
-    expected: FAIL
-
   [Element interface: element must inherit property "slot" with the proper type (7)]
     expected: FAIL
 
@@ -39,9 +37,6 @@
   [Element interface: element must inherit property "assignedSlot" with the proper type (48)]
     expected: FAIL
 
-  [Text interface: attribute assignedSlot]
-    expected: FAIL
-
   [Text interface: document.createTextNode("abc") must inherit property "assignedSlot" with the proper type (2)]
     expected: FAIL
 
@@ -102,9 +97,3 @@
   [Element interface: element must inherit property "attachShadow(ShadowRootInit)" with the proper type]
     expected: FAIL
 
-  [Element interface: element must inherit property "assignedSlot" with the proper type]
-    expected: FAIL
-
-  [Text interface: document.createTextNode("abc") must inherit property "assignedSlot" with the proper type]
-    expected: FAIL
-

testing/web-platform/meta/payment-request/interfaces.https.html.ini

@@ -1,5 +1,6 @@
 [interfaces.https.html]
   type: testharness
+  prefs: [dom.webcomponents.enabled:true]
   [PaymentRequest interface: existence and properties of interface object]
     expected: FAIL
 
@@ -276,12 +277,6 @@
   [Element interface: operation attachShadow(ShadowRootInit)]
     expected: FAIL
 
-  [Element interface: attribute assignedSlot]
-    expected: FAIL
-
-  [Text interface: attribute assignedSlot]
-    expected: FAIL
-
   [PaymentRequest must be primary interface of new PaymentRequest([{supportedMethods: 'foo'}\], {total: {label: 'bar', amount: {currency: 'USD', value: '0'}} })]
     expected: FAIL
 

testing/web-platform/meta/shadow-dom/Slotable-interface.html.ini

@@ -1,8 +1,6 @@
 [Slotable-interface.html]
   type: testharness
-  [assignedSlot attribute must be defined on Element and Text interfaces]
-    expected: FAIL
-
+  prefs: [dom.webcomponents.enabled:true]
   [assignedSlot must return null when the node does not have an assigned node]
     expected: FAIL