/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim: set ts=8 sts=2 et sw=2 tw=80: */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ /** * A fake content node class so that the image frame for * content: url(foo); * in CSS can have an nsIImageLoadingContent but use an * imgIRequest that's already been loaded from the style system. */ #include "nsContentCreatorFunctions.h" #include "nsXMLElement.h" #include "nsImageLoadingContent.h" #include "imgIRequest.h" #include "mozilla/BasicEvents.h" #include "mozilla/EventDispatcher.h" #include "mozilla/EventStates.h" using namespace mozilla; class nsGenConImageContent final : public nsXMLElement, public nsImageLoadingContent { public: explicit nsGenConImageContent(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo) : nsXMLElement(aNodeInfo) { // nsImageLoadingContent starts out broken, so we start out // suppressed to match it. AddStatesSilently(NS_EVENT_STATE_SUPPRESSED); } nsresult Init(imgRequestProxy* aImageRequest) { // No need to notify, since we have no frame. return UseAsPrimaryRequest(aImageRequest, false, eImageLoadType_Normal); } // nsIContent overrides virtual nsresult BindToTree(nsIDocument* aDocument, nsIContent* aParent, nsIContent* aBindingParent, bool aCompileEventHandlers) override; virtual void UnbindFromTree(bool aDeep, bool aNullParent) override; virtual EventStates IntrinsicState() const override; virtual nsresult PreHandleEvent(EventChainPreVisitor& aVisitor) override { MOZ_ASSERT(IsInNativeAnonymousSubtree()); if (aVisitor.mEvent->mMessage == eLoad || aVisitor.mEvent->mMessage == eLoadError) { // Don't propagate the events to the parent. return NS_OK; } return nsXMLElement::PreHandleEvent(aVisitor); } private: virtual ~nsGenConImageContent(); public: NS_DECL_ISUPPORTS_INHERITED }; NS_IMPL_ISUPPORTS_INHERITED(nsGenConImageContent, nsXMLElement, nsIImageLoadingContent, imgINotificationObserver, imgIOnloadBlocker) nsresult NS_NewGenConImageContent(nsIContent** aResult, already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo, imgRequestProxy* aImageRequest) { NS_PRECONDITION(aImageRequest, "Must have request!"); nsGenConImageContent *it = new nsGenConImageContent(aNodeInfo); NS_ADDREF(*aResult = it); nsresult rv = it->Init(aImageRequest); if (NS_FAILED(rv)) NS_RELEASE(*aResult); return rv; } nsGenConImageContent::~nsGenConImageContent() { DestroyImageLoadingContent(); } nsresult nsGenConImageContent::BindToTree(nsIDocument* aDocument, nsIContent* aParent, nsIContent* aBindingParent, bool aCompileEventHandlers) { nsresult rv; rv = nsXMLElement::BindToTree(aDocument, aParent, aBindingParent, aCompileEventHandlers); NS_ENSURE_SUCCESS(rv, rv); nsImageLoadingContent::BindToTree(aDocument, aParent, aBindingParent, aCompileEventHandlers); return NS_OK; } void nsGenConImageContent::UnbindFromTree(bool aDeep, bool aNullParent) { nsImageLoadingContent::UnbindFromTree(aDeep, aNullParent); nsXMLElement::UnbindFromTree(aDeep, aNullParent); } EventStates nsGenConImageContent::IntrinsicState() const { EventStates state = nsXMLElement::IntrinsicState(); EventStates imageState = nsImageLoadingContent::ImageState(); if (imageState.HasAtLeastOneOfStates(NS_EVENT_STATE_BROKEN | NS_EVENT_STATE_USERDISABLED)) { // We should never be in an error state; if the image fails to load, we // just go to the suppressed state. imageState |= NS_EVENT_STATE_SUPPRESSED; imageState &= ~NS_EVENT_STATE_BROKEN; } imageState &= ~NS_EVENT_STATE_LOADING; return state | imageState; }