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