michael@0: 
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /**
michael@0:  * A fake content node class so that the image frame for
michael@0:  *   content: url(foo);
michael@0:  * in CSS can have an nsIImageLoadingContent but use an
michael@0:  * imgIRequest that's already been loaded from the style system.
michael@0:  */
michael@0: 
michael@0: #include "nsContentCreatorFunctions.h"
michael@0: #include "nsXMLElement.h"
michael@0: #include "nsImageLoadingContent.h"
michael@0: #include "imgIRequest.h"
michael@0: #include "mozilla/BasicEvents.h"
michael@0: #include "mozilla/EventDispatcher.h"
michael@0: #include "mozilla/EventStates.h"
michael@0: 
michael@0: using namespace mozilla;
michael@0: 
michael@0: class nsGenConImageContent MOZ_FINAL : public nsXMLElement,
michael@0:                                        public nsImageLoadingContent
michael@0: {
michael@0: public:
michael@0:   nsGenConImageContent(already_AddRefed<nsINodeInfo>& aNodeInfo)
michael@0:     : nsXMLElement(aNodeInfo)
michael@0:   {
michael@0:     // nsImageLoadingContent starts out broken, so we start out
michael@0:     // suppressed to match it.
michael@0:     AddStatesSilently(NS_EVENT_STATE_SUPPRESSED);
michael@0:   }
michael@0: 
michael@0:   nsresult Init(imgRequestProxy* aImageRequest)
michael@0:   {
michael@0:     // No need to notify, since we have no frame.
michael@0:     return UseAsPrimaryRequest(aImageRequest, false);
michael@0:   }
michael@0: 
michael@0:   // nsIContent overrides
michael@0:   virtual nsresult BindToTree(nsIDocument* aDocument, nsIContent* aParent,
michael@0:                               nsIContent* aBindingParent,
michael@0:                               bool aCompileEventHandlers);
michael@0:   virtual void UnbindFromTree(bool aDeep, bool aNullParent);
michael@0:   virtual EventStates IntrinsicState() const;
michael@0: 
michael@0:   virtual nsresult PreHandleEvent(EventChainPreVisitor& aVisitor)
michael@0:   {
michael@0:     MOZ_ASSERT(IsInNativeAnonymousSubtree());
michael@0:     if (aVisitor.mEvent->message == NS_LOAD ||
michael@0:         aVisitor.mEvent->message == NS_LOAD_ERROR) {
michael@0:       // Don't propagate the events to the parent.
michael@0:       return NS_OK;
michael@0:     }
michael@0:     return nsXMLElement::PreHandleEvent(aVisitor);
michael@0:   }
michael@0:   
michael@0: private:
michael@0:   virtual ~nsGenConImageContent();
michael@0: 
michael@0: public:
michael@0:   NS_DECL_ISUPPORTS_INHERITED
michael@0: };
michael@0: 
michael@0: NS_IMPL_ISUPPORTS_INHERITED(nsGenConImageContent,
michael@0:                             nsXMLElement,
michael@0:                             nsIImageLoadingContent,
michael@0:                             imgINotificationObserver,
michael@0:                             imgIOnloadBlocker)
michael@0: 
michael@0: nsresult
michael@0: NS_NewGenConImageContent(nsIContent** aResult, already_AddRefed<nsINodeInfo>&& aNodeInfo,
michael@0:                          imgRequestProxy* aImageRequest)
michael@0: {
michael@0:   NS_PRECONDITION(aImageRequest, "Must have request!");
michael@0:   nsGenConImageContent *it = new nsGenConImageContent(aNodeInfo);
michael@0:   if (!it)
michael@0:     return NS_ERROR_OUT_OF_MEMORY;
michael@0:   NS_ADDREF(*aResult = it);
michael@0:   nsresult rv = it->Init(aImageRequest);
michael@0:   if (NS_FAILED(rv))
michael@0:     NS_RELEASE(*aResult);
michael@0:   return rv;
michael@0: }
michael@0: 
michael@0: nsGenConImageContent::~nsGenConImageContent()
michael@0: {
michael@0:   DestroyImageLoadingContent();
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: nsGenConImageContent::BindToTree(nsIDocument* aDocument, nsIContent* aParent,
michael@0:                                  nsIContent* aBindingParent,
michael@0:                                  bool aCompileEventHandlers)
michael@0: {
michael@0:   nsresult rv;
michael@0:   rv = nsXMLElement::BindToTree(aDocument, aParent, aBindingParent,
michael@0:                                 aCompileEventHandlers);
michael@0:   NS_ENSURE_SUCCESS(rv, rv);
michael@0: 
michael@0:   nsImageLoadingContent::BindToTree(aDocument, aParent, aBindingParent,
michael@0:                                     aCompileEventHandlers);
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: void
michael@0: nsGenConImageContent::UnbindFromTree(bool aDeep, bool aNullParent)
michael@0: {
michael@0:   nsImageLoadingContent::UnbindFromTree(aDeep, aNullParent);
michael@0:   nsXMLElement::UnbindFromTree(aDeep, aNullParent);
michael@0: }
michael@0: 
michael@0: EventStates
michael@0: nsGenConImageContent::IntrinsicState() const
michael@0: {
michael@0:   EventStates state = nsXMLElement::IntrinsicState();
michael@0: 
michael@0:   EventStates imageState = nsImageLoadingContent::ImageState();
michael@0:   if (imageState.HasAtLeastOneOfStates(NS_EVENT_STATE_BROKEN | NS_EVENT_STATE_USERDISABLED)) {
michael@0:     // We should never be in an error state; if the image fails to load, we
michael@0:     // just go to the suppressed state.
michael@0:     imageState |= NS_EVENT_STATE_SUPPRESSED;
michael@0:     imageState &= ~NS_EVENT_STATE_BROKEN;
michael@0:   }
michael@0:   imageState &= ~NS_EVENT_STATE_LOADING;
michael@0:   return state | imageState;
michael@0: }