зеркало из https://github.com/mozilla/gecko-dev.git
1356 строки
42 KiB
C++
1356 строки
42 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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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#include "mozilla/dom/HTMLImageElement.h"
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#include "mozilla/dom/HTMLImageElementBinding.h"
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#include "nsGkAtoms.h"
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#include "nsStyleConsts.h"
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#include "nsPresContext.h"
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#include "nsMappedAttributes.h"
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#include "nsSize.h"
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#include "nsDocument.h"
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#include "nsIDocument.h"
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#include "nsIDOMMutationEvent.h"
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#include "nsIScriptContext.h"
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#include "nsIURL.h"
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#include "nsIIOService.h"
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#include "nsIServiceManager.h"
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#include "nsContentUtils.h"
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#include "nsContainerFrame.h"
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#include "nsNodeInfoManager.h"
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#include "mozilla/MouseEvents.h"
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#include "nsContentPolicyUtils.h"
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#include "nsIDOMWindow.h"
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#include "nsFocusManager.h"
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#include "mozilla/dom/HTMLFormElement.h"
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#include "nsAttrValueOrString.h"
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#include "imgLoader.h"
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#include "Image.h"
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// Responsive images!
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#include "mozilla/dom/HTMLSourceElement.h"
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#include "mozilla/dom/ResponsiveImageSelector.h"
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#include "imgIContainer.h"
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#include "imgILoader.h"
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#include "imgINotificationObserver.h"
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#include "imgRequestProxy.h"
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#include "nsILoadGroup.h"
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#include "nsIDOMHTMLMapElement.h"
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#include "mozilla/EventDispatcher.h"
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#include "mozilla/EventStates.h"
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#include "mozilla/GenericSpecifiedValuesInlines.h"
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#include "mozilla/net/ReferrerPolicy.h"
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#include "nsLayoutUtils.h"
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using namespace mozilla::net;
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NS_IMPL_NS_NEW_HTML_ELEMENT(Image)
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#ifdef DEBUG
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// Is aSubject a previous sibling of aNode.
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static bool IsPreviousSibling(nsINode *aSubject, nsINode *aNode)
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{
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if (aSubject == aNode) {
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return false;
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}
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nsINode *parent = aSubject->GetParentNode();
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if (parent && parent == aNode->GetParentNode()) {
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return parent->IndexOf(aSubject) < parent->IndexOf(aNode);
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}
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return false;
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}
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#endif
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namespace mozilla {
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namespace dom {
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// Calls LoadSelectedImage on host element unless it has been superseded or
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// canceled -- this is the synchronous section of "update the image data".
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// https://html.spec.whatwg.org/multipage/embedded-content.html#update-the-image-data
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class ImageLoadTask : public Runnable
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{
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public:
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ImageLoadTask(HTMLImageElement* aElement,
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bool aAlwaysLoad,
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bool aUseUrgentStartForChannel)
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: Runnable("dom::ImageLoadTask")
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, mElement(aElement)
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, mAlwaysLoad(aAlwaysLoad)
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, mUseUrgentStartForChannel(aUseUrgentStartForChannel)
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{
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mDocument = aElement->OwnerDoc();
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mDocument->BlockOnload();
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}
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NS_IMETHOD Run() override
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{
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if (mElement->mPendingImageLoadTask == this) {
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mElement->mPendingImageLoadTask = nullptr;
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mElement->mUseUrgentStartForChannel = mUseUrgentStartForChannel;
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mElement->LoadSelectedImage(true, true, mAlwaysLoad);
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}
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mDocument->UnblockOnload(false);
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return NS_OK;
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}
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bool AlwaysLoad() {
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return mAlwaysLoad;
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}
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private:
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~ImageLoadTask() {}
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RefPtr<HTMLImageElement> mElement;
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nsCOMPtr<nsIDocument> mDocument;
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bool mAlwaysLoad;
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// True if we want to set nsIClassOfService::UrgentStart to the channel to
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// get the response ASAP for better user responsiveness.
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bool mUseUrgentStartForChannel;
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};
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HTMLImageElement::HTMLImageElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
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: nsGenericHTMLElement(aNodeInfo)
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, mForm(nullptr)
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, mInDocResponsiveContent(false)
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, mCurrentDensity(1.0)
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{
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// We start out broken
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AddStatesSilently(NS_EVENT_STATE_BROKEN);
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}
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HTMLImageElement::~HTMLImageElement()
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{
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DestroyImageLoadingContent();
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}
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NS_IMPL_ADDREF_INHERITED(HTMLImageElement, Element)
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NS_IMPL_RELEASE_INHERITED(HTMLImageElement, Element)
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NS_IMPL_CYCLE_COLLECTION_INHERITED(HTMLImageElement,
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nsGenericHTMLElement,
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mResponsiveSelector)
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// QueryInterface implementation for HTMLImageElement
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NS_INTERFACE_TABLE_HEAD_CYCLE_COLLECTION_INHERITED(HTMLImageElement)
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NS_INTERFACE_TABLE_INHERITED(HTMLImageElement,
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nsIDOMHTMLImageElement,
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nsIImageLoadingContent,
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imgIOnloadBlocker,
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imgINotificationObserver)
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NS_INTERFACE_TABLE_TAIL_INHERITING(nsGenericHTMLElement)
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NS_IMPL_ELEMENT_CLONE(HTMLImageElement)
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bool
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HTMLImageElement::IsInteractiveHTMLContent(bool aIgnoreTabindex) const
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{
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return HasAttr(kNameSpaceID_None, nsGkAtoms::usemap) ||
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nsGenericHTMLElement::IsInteractiveHTMLContent(aIgnoreTabindex);
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}
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void
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HTMLImageElement::AsyncEventRunning(AsyncEventDispatcher* aEvent)
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{
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nsImageLoadingContent::AsyncEventRunning(aEvent);
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}
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void
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HTMLImageElement::GetCurrentSrc(nsAString& aValue)
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{
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nsCOMPtr<nsIURI> currentURI;
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GetCurrentURI(getter_AddRefs(currentURI));
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if (currentURI) {
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nsAutoCString spec;
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currentURI->GetSpec(spec);
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CopyUTF8toUTF16(spec, aValue);
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} else {
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SetDOMStringToNull(aValue);
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}
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}
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bool
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HTMLImageElement::Draggable() const
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{
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// images may be dragged unless the draggable attribute is false
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return !AttrValueIs(kNameSpaceID_None, nsGkAtoms::draggable,
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nsGkAtoms::_false, eIgnoreCase);
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}
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bool
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HTMLImageElement::Complete()
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{
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if (!mCurrentRequest) {
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return true;
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}
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if (mPendingRequest) {
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return false;
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}
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uint32_t status;
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mCurrentRequest->GetImageStatus(&status);
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return
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(status &
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(imgIRequest::STATUS_LOAD_COMPLETE | imgIRequest::STATUS_ERROR)) != 0;
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}
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CSSIntPoint
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HTMLImageElement::GetXY()
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{
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nsIFrame* frame = GetPrimaryFrame(FlushType::Layout);
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if (!frame) {
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return CSSIntPoint(0, 0);
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}
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nsIFrame* layer = nsLayoutUtils::GetClosestLayer(frame->GetParent());
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return CSSIntPoint::FromAppUnitsRounded(frame->GetOffsetTo(layer));
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}
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int32_t
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HTMLImageElement::X()
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{
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return GetXY().x;
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}
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int32_t
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HTMLImageElement::Y()
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{
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return GetXY().y;
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}
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bool
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HTMLImageElement::ParseAttribute(int32_t aNamespaceID,
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nsIAtom* aAttribute,
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const nsAString& aValue,
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nsAttrValue& aResult)
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{
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if (aNamespaceID == kNameSpaceID_None) {
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if (aAttribute == nsGkAtoms::align) {
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return ParseAlignValue(aValue, aResult);
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}
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if (aAttribute == nsGkAtoms::crossorigin) {
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ParseCORSValue(aValue, aResult);
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return true;
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}
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if (ParseImageAttribute(aAttribute, aValue, aResult)) {
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return true;
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}
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}
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return nsGenericHTMLElement::ParseAttribute(aNamespaceID, aAttribute, aValue,
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aResult);
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}
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void
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HTMLImageElement::MapAttributesIntoRule(const nsMappedAttributes* aAttributes,
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GenericSpecifiedValues* aData)
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{
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nsGenericHTMLElement::MapImageAlignAttributeInto(aAttributes, aData);
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nsGenericHTMLElement::MapImageBorderAttributeInto(aAttributes, aData);
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nsGenericHTMLElement::MapImageMarginAttributeInto(aAttributes, aData);
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nsGenericHTMLElement::MapImageSizeAttributesInto(aAttributes, aData);
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nsGenericHTMLElement::MapCommonAttributesInto(aAttributes, aData);
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}
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nsChangeHint
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HTMLImageElement::GetAttributeChangeHint(const nsIAtom* aAttribute,
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int32_t aModType) const
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{
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nsChangeHint retval =
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nsGenericHTMLElement::GetAttributeChangeHint(aAttribute, aModType);
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if (aAttribute == nsGkAtoms::usemap ||
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aAttribute == nsGkAtoms::ismap) {
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retval |= nsChangeHint_ReconstructFrame;
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} else if (aAttribute == nsGkAtoms::alt) {
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if (aModType == nsIDOMMutationEvent::ADDITION ||
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aModType == nsIDOMMutationEvent::REMOVAL) {
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retval |= nsChangeHint_ReconstructFrame;
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}
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}
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return retval;
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}
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NS_IMETHODIMP_(bool)
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HTMLImageElement::IsAttributeMapped(const nsIAtom* aAttribute) const
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{
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static const MappedAttributeEntry* const map[] = {
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sCommonAttributeMap,
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sImageMarginSizeAttributeMap,
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sImageBorderAttributeMap,
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sImageAlignAttributeMap
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};
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return FindAttributeDependence(aAttribute, map);
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}
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nsMapRuleToAttributesFunc
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HTMLImageElement::GetAttributeMappingFunction() const
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{
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return &MapAttributesIntoRule;
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}
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nsresult
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HTMLImageElement::BeforeSetAttr(int32_t aNameSpaceID, nsIAtom* aName,
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const nsAttrValueOrString* aValue,
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bool aNotify)
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{
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if (aNameSpaceID == kNameSpaceID_None && mForm &&
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(aName == nsGkAtoms::name || aName == nsGkAtoms::id)) {
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// remove the image from the hashtable as needed
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nsAutoString tmp;
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GetAttr(kNameSpaceID_None, aName, tmp);
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if (!tmp.IsEmpty()) {
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mForm->RemoveImageElementFromTable(this, tmp);
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}
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}
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return nsGenericHTMLElement::BeforeSetAttr(aNameSpaceID, aName,
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aValue, aNotify);
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}
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nsresult
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HTMLImageElement::AfterSetAttr(int32_t aNameSpaceID, nsIAtom* aName,
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const nsAttrValue* aValue,
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const nsAttrValue* aOldValue, bool aNotify)
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{
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nsAttrValueOrString attrVal(aValue);
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if (aValue) {
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AfterMaybeChangeAttr(aNameSpaceID, aName, attrVal, aOldValue, true,
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aNotify);
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}
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if (aNameSpaceID == kNameSpaceID_None && mForm &&
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(aName == nsGkAtoms::name || aName == nsGkAtoms::id) &&
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aValue && !aValue->IsEmptyString()) {
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// add the image to the hashtable as needed
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MOZ_ASSERT(aValue->Type() == nsAttrValue::eAtom,
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"Expected atom value for name/id");
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mForm->AddImageElementToTable(this,
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nsDependentAtomString(aValue->GetAtomValue()));
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}
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// Handle src/srcset updates. If aNotify is false, we are coming from the
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// parser or some such place; we'll get bound after all the attributes have
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// been set, so we'll do the image load from BindToTree.
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if (aName == nsGkAtoms::src &&
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aNameSpaceID == kNameSpaceID_None &&
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!aValue) {
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// Mark channel as urgent-start before load image if the image load is
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// initaiated by a user interaction.
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mUseUrgentStartForChannel = EventStateManager::IsHandlingUserInput();
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// SetAttr handles setting src since it needs to catch img.src =
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// img.src, so we only need to handle the unset case
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if (InResponsiveMode()) {
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if (mResponsiveSelector &&
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mResponsiveSelector->Content() == this) {
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mResponsiveSelector->SetDefaultSource(NullString());
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}
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QueueImageLoadTask(true);
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} else {
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// Bug 1076583 - We still behave synchronously in the non-responsive case
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CancelImageRequests(aNotify);
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}
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} else if (aName == nsGkAtoms::srcset &&
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aNameSpaceID == kNameSpaceID_None) {
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// Mark channel as urgent-start before load image if the image load is
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// initaiated by a user interaction.
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mUseUrgentStartForChannel = EventStateManager::IsHandlingUserInput();
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PictureSourceSrcsetChanged(this, attrVal.String(), aNotify);
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} else if (aName == nsGkAtoms::sizes &&
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aNameSpaceID == kNameSpaceID_None) {
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// Mark channel as urgent-start before load image if the image load is
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// initaiated by a user interaction.
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mUseUrgentStartForChannel = EventStateManager::IsHandlingUserInput();
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PictureSourceSizesChanged(this, attrVal.String(), aNotify);
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}
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return nsGenericHTMLElement::AfterSetAttr(aNameSpaceID, aName,
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aValue, aOldValue, aNotify);
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}
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nsresult
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HTMLImageElement::OnAttrSetButNotChanged(int32_t aNamespaceID, nsIAtom* aName,
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const nsAttrValueOrString& aValue,
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bool aNotify)
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{
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AfterMaybeChangeAttr(aNamespaceID, aName, aValue, nullptr, false, aNotify);
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return nsGenericHTMLElement::OnAttrSetButNotChanged(aNamespaceID, aName,
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aValue, aNotify);
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}
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void
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HTMLImageElement::AfterMaybeChangeAttr(int32_t aNamespaceID, nsIAtom* aName,
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const nsAttrValueOrString& aValue,
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const nsAttrValue* aOldValue,
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bool aValueMaybeChanged, bool aNotify)
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{
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bool forceReload = false;
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// We need to force our image to reload. This must be done here, not in
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// AfterSetAttr or BeforeSetAttr, because we want to do it even if the attr is
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// being set to its existing value, which is normally optimized away as a
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// no-op.
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//
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// If we are in responsive mode, we drop the forced reload behavior,
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// but still trigger a image load task for img.src = img.src per
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// spec.
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//
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// Both cases handle unsetting src in AfterSetAttr
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if (aNamespaceID == kNameSpaceID_None &&
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aName == nsGkAtoms::src) {
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// Mark channel as urgent-start before load image if the image load is
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// initaiated by a user interaction.
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mUseUrgentStartForChannel = EventStateManager::IsHandlingUserInput();
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if (InResponsiveMode()) {
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if (mResponsiveSelector &&
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mResponsiveSelector->Content() == this) {
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mResponsiveSelector->SetDefaultSource(aValue.String());
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}
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QueueImageLoadTask(true);
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} else if (aNotify && OwnerDoc()->IsCurrentActiveDocument()) {
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// If aNotify is false, we are coming from the parser or some such place;
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// we'll get bound after all the attributes have been set, so we'll do the
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// sync image load from BindToTree. Skip the LoadImage call in that case.
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// Note that this sync behavior is partially removed from the spec, bug 1076583
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// A hack to get animations to reset. See bug 594771.
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mNewRequestsWillNeedAnimationReset = true;
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// Force image loading here, so that we'll try to load the image from
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// network if it's set to be not cacheable.
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// Potentially, false could be passed here rather than aNotify since
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// UpdateState will be called by SetAttrAndNotify, but there are two
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// obstacles to this: 1) LoadImage will end up calling
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// UpdateState(aNotify), and we do not want it to call UpdateState(false)
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// when aNotify is true, and 2) When this function is called by
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// OnAttrSetButNotChanged, SetAttrAndNotify will not subsequently call
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// UpdateState.
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LoadImage(aValue.String(), true, aNotify, eImageLoadType_Normal);
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mNewRequestsWillNeedAnimationReset = false;
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}
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} else if (aNamespaceID == kNameSpaceID_None &&
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aName == nsGkAtoms::crossorigin &&
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aNotify) {
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if (aValueMaybeChanged && GetCORSMode() != AttrValueToCORSMode(aOldValue)) {
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// Force a new load of the image with the new cross origin policy.
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forceReload = true;
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}
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} else if (aName == nsGkAtoms::referrerpolicy &&
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aNamespaceID == kNameSpaceID_None &&
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aNotify) {
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ReferrerPolicy referrerPolicy = GetImageReferrerPolicy();
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if (!InResponsiveMode() &&
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referrerPolicy != RP_Unset &&
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aValueMaybeChanged &&
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referrerPolicy != ReferrerPolicyFromAttr(aOldValue)) {
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// XXX: Bug 1076583 - We still use the older synchronous algorithm
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// Because referrerPolicy is not treated as relevant mutations, setting
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// the attribute will neither trigger a reload nor update the referrer
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// policy of the loading channel (whether it has previously completed or
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// not). Force a new load of the image with the new referrerpolicy.
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forceReload = true;
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}
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}
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// Because we load image synchronously in non-responsive-mode, we need to do
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// reload after the attribute has been set if the reload is triggerred by
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// cross origin changing.
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if (forceReload) {
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// Mark channel as urgent-start before load image if the image load is
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// initaiated by a user interaction.
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mUseUrgentStartForChannel = EventStateManager::IsHandlingUserInput();
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if (InResponsiveMode()) {
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// per spec, full selection runs when this changes, even though
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// it doesn't directly affect the source selection
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QueueImageLoadTask(true);
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} else if (OwnerDoc()->IsCurrentActiveDocument()) {
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// Bug 1076583 - We still use the older synchronous algorithm in
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// non-responsive mode. Force a new load of the image with the
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// new cross origin policy
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ForceReload(aNotify);
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}
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}
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}
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nsresult
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HTMLImageElement::GetEventTargetParent(EventChainPreVisitor& aVisitor)
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{
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// We handle image element with attribute ismap in its corresponding frame
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// element. Set mMultipleActionsPrevented here to prevent the click event
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// trigger the behaviors in Element::PostHandleEventForLinks
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WidgetMouseEvent* mouseEvent = aVisitor.mEvent->AsMouseEvent();
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if (mouseEvent && mouseEvent->IsLeftClickEvent() && IsMap()) {
|
|
mouseEvent->mFlags.mMultipleActionsPrevented = true;
|
|
}
|
|
return nsGenericHTMLElement::GetEventTargetParent(aVisitor);
|
|
}
|
|
|
|
bool
|
|
HTMLImageElement::IsHTMLFocusable(bool aWithMouse,
|
|
bool *aIsFocusable, int32_t *aTabIndex)
|
|
{
|
|
int32_t tabIndex = TabIndex();
|
|
|
|
if (IsInUncomposedDoc()) {
|
|
nsAutoString usemap;
|
|
GetUseMap(usemap);
|
|
// XXXbz which document should this be using? sXBL/XBL2 issue! I
|
|
// think that OwnerDoc() is right, since we don't want to
|
|
// assume stuff about the document we're bound to.
|
|
if (OwnerDoc()->FindImageMap(usemap)) {
|
|
if (aTabIndex) {
|
|
// Use tab index on individual map areas
|
|
*aTabIndex = (sTabFocusModel & eTabFocus_linksMask)? 0 : -1;
|
|
}
|
|
// Image map is not focusable itself, but flag as tabbable
|
|
// so that image map areas get walked into.
|
|
*aIsFocusable = false;
|
|
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if (aTabIndex) {
|
|
// Can be in tab order if tabindex >=0 and form controls are tabbable.
|
|
*aTabIndex = (sTabFocusModel & eTabFocus_formElementsMask)? tabIndex : -1;
|
|
}
|
|
|
|
*aIsFocusable =
|
|
#ifdef XP_MACOSX
|
|
(!aWithMouse || nsFocusManager::sMouseFocusesFormControl) &&
|
|
#endif
|
|
(tabIndex >= 0 || HasAttr(kNameSpaceID_None, nsGkAtoms::tabindex));
|
|
|
|
return false;
|
|
}
|
|
|
|
nsresult
|
|
HTMLImageElement::BindToTree(nsIDocument* aDocument, nsIContent* aParent,
|
|
nsIContent* aBindingParent,
|
|
bool aCompileEventHandlers)
|
|
{
|
|
nsresult rv = nsGenericHTMLElement::BindToTree(aDocument, aParent,
|
|
aBindingParent,
|
|
aCompileEventHandlers);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
nsImageLoadingContent::BindToTree(aDocument, aParent, aBindingParent,
|
|
aCompileEventHandlers);
|
|
|
|
if (aParent) {
|
|
UpdateFormOwner();
|
|
}
|
|
|
|
if (HaveSrcsetOrInPicture()) {
|
|
if (aDocument && !mInDocResponsiveContent) {
|
|
aDocument->AddResponsiveContent(this);
|
|
mInDocResponsiveContent = true;
|
|
}
|
|
|
|
// Mark channel as urgent-start before load image if the image load is
|
|
// initaiated by a user interaction.
|
|
mUseUrgentStartForChannel = EventStateManager::IsHandlingUserInput();
|
|
|
|
// Run selection algorithm when an img element is inserted into a document
|
|
// in order to react to changes in the environment. See note of
|
|
// https://html.spec.whatwg.org/multipage/embedded-content.html#img-environment-changes
|
|
QueueImageLoadTask(false);
|
|
} else if (!InResponsiveMode() &&
|
|
HasAttr(kNameSpaceID_None, nsGkAtoms::src)) {
|
|
// We skip loading when our attributes were set from parser land,
|
|
// so trigger a aForce=false load now to check if things changed.
|
|
// This isn't necessary for responsive mode, since creating the
|
|
// image load task is asynchronous we don't need to take special
|
|
// care to avoid doing so when being filled by the parser.
|
|
|
|
// Mark channel as urgent-start before load image if the image load is
|
|
// initaiated by a user interaction.
|
|
mUseUrgentStartForChannel = EventStateManager::IsHandlingUserInput();
|
|
|
|
// FIXME: Bug 660963 it would be nice if we could just have
|
|
// ClearBrokenState update our state and do it fast...
|
|
ClearBrokenState();
|
|
RemoveStatesSilently(NS_EVENT_STATE_BROKEN);
|
|
|
|
// We still act synchronously for the non-responsive case (Bug
|
|
// 1076583), but still need to delay if it is unsafe to run
|
|
// script.
|
|
|
|
// If loading is temporarily disabled, don't even launch MaybeLoadImage.
|
|
// Otherwise MaybeLoadImage may run later when someone has reenabled
|
|
// loading.
|
|
if (LoadingEnabled() &&
|
|
OwnerDoc()->IsCurrentActiveDocument()) {
|
|
nsContentUtils::AddScriptRunner(
|
|
NewRunnableMethod<bool>("dom::HTMLImageElement::MaybeLoadImage",
|
|
this,
|
|
&HTMLImageElement::MaybeLoadImage,
|
|
false));
|
|
}
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
void
|
|
HTMLImageElement::UnbindFromTree(bool aDeep, bool aNullParent)
|
|
{
|
|
if (mForm) {
|
|
if (aNullParent || !FindAncestorForm(mForm)) {
|
|
ClearForm(true);
|
|
} else {
|
|
UnsetFlags(MAYBE_ORPHAN_FORM_ELEMENT);
|
|
}
|
|
}
|
|
|
|
if (mInDocResponsiveContent) {
|
|
nsIDocument* doc = GetOurOwnerDoc();
|
|
MOZ_ASSERT(doc);
|
|
if (doc) {
|
|
doc->RemoveResponsiveContent(this);
|
|
mInDocResponsiveContent = false;
|
|
}
|
|
}
|
|
|
|
nsImageLoadingContent::UnbindFromTree(aDeep, aNullParent);
|
|
nsGenericHTMLElement::UnbindFromTree(aDeep, aNullParent);
|
|
}
|
|
|
|
void
|
|
HTMLImageElement::UpdateFormOwner()
|
|
{
|
|
if (!mForm) {
|
|
mForm = FindAncestorForm();
|
|
}
|
|
|
|
if (mForm && !HasFlag(ADDED_TO_FORM)) {
|
|
// Now we need to add ourselves to the form
|
|
nsAutoString nameVal, idVal;
|
|
GetAttr(kNameSpaceID_None, nsGkAtoms::name, nameVal);
|
|
GetAttr(kNameSpaceID_None, nsGkAtoms::id, idVal);
|
|
|
|
SetFlags(ADDED_TO_FORM);
|
|
|
|
mForm->AddImageElement(this);
|
|
|
|
if (!nameVal.IsEmpty()) {
|
|
mForm->AddImageElementToTable(this, nameVal);
|
|
}
|
|
|
|
if (!idVal.IsEmpty()) {
|
|
mForm->AddImageElementToTable(this, idVal);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
HTMLImageElement::MaybeLoadImage(bool aAlwaysForceLoad)
|
|
{
|
|
// Our base URI may have changed, or we may have had responsive parameters
|
|
// change while not bound to the tree. Re-parse src/srcset and call LoadImage,
|
|
// which is a no-op if it resolves to the same effective URI without aForce.
|
|
|
|
// Note, check LoadingEnabled() after LoadImage call.
|
|
|
|
LoadSelectedImage(aAlwaysForceLoad, /* aNotify */ true, aAlwaysForceLoad);
|
|
|
|
if (!LoadingEnabled()) {
|
|
CancelImageRequests(true);
|
|
}
|
|
}
|
|
|
|
EventStates
|
|
HTMLImageElement::IntrinsicState() const
|
|
{
|
|
return nsGenericHTMLElement::IntrinsicState() |
|
|
nsImageLoadingContent::ImageState();
|
|
}
|
|
|
|
void
|
|
HTMLImageElement::NodeInfoChanged(nsIDocument* aOldDoc)
|
|
{
|
|
nsGenericHTMLElement::NodeInfoChanged(aOldDoc);
|
|
// Force reload image if adoption steps are run.
|
|
// If loading is temporarily disabled, don't even launch script runner.
|
|
// Otherwise script runner may run later when someone has reenabled loading.
|
|
if (LoadingEnabled()) {
|
|
// Use script runner for the case the adopt is from appendChild.
|
|
// Bug 1076583 - We still behave synchronously in the non-responsive case
|
|
nsContentUtils::AddScriptRunner(
|
|
(InResponsiveMode())
|
|
? NewRunnableMethod<bool>("dom::HTMLImageElement::QueueImageLoadTask",
|
|
this,
|
|
&HTMLImageElement::QueueImageLoadTask,
|
|
true)
|
|
: NewRunnableMethod<bool>("dom::HTMLImageElement::MaybeLoadImage",
|
|
this,
|
|
&HTMLImageElement::MaybeLoadImage,
|
|
true));
|
|
}
|
|
}
|
|
|
|
// static
|
|
already_AddRefed<HTMLImageElement>
|
|
HTMLImageElement::Image(const GlobalObject& aGlobal,
|
|
const Optional<uint32_t>& aWidth,
|
|
const Optional<uint32_t>& aHeight,
|
|
ErrorResult& aError)
|
|
{
|
|
nsCOMPtr<nsPIDOMWindowInner> win = do_QueryInterface(aGlobal.GetAsSupports());
|
|
nsIDocument* doc;
|
|
if (!win || !(doc = win->GetExtantDoc())) {
|
|
aError.Throw(NS_ERROR_FAILURE);
|
|
return nullptr;
|
|
}
|
|
|
|
already_AddRefed<mozilla::dom::NodeInfo> nodeInfo =
|
|
doc->NodeInfoManager()->GetNodeInfo(nsGkAtoms::img, nullptr,
|
|
kNameSpaceID_XHTML,
|
|
nsIDOMNode::ELEMENT_NODE);
|
|
|
|
RefPtr<HTMLImageElement> img = new HTMLImageElement(nodeInfo);
|
|
|
|
if (aWidth.WasPassed()) {
|
|
img->SetWidth(aWidth.Value(), aError);
|
|
if (aError.Failed()) {
|
|
return nullptr;
|
|
}
|
|
|
|
if (aHeight.WasPassed()) {
|
|
img->SetHeight(aHeight.Value(), aError);
|
|
if (aError.Failed()) {
|
|
return nullptr;
|
|
}
|
|
}
|
|
}
|
|
|
|
return img.forget();
|
|
}
|
|
|
|
uint32_t
|
|
HTMLImageElement::NaturalHeight()
|
|
{
|
|
uint32_t height;
|
|
nsresult rv = nsImageLoadingContent::GetNaturalHeight(&height);
|
|
|
|
if (NS_FAILED(rv)) {
|
|
MOZ_ASSERT(false, "GetNaturalHeight should not fail");
|
|
return 0;
|
|
}
|
|
|
|
if (mResponsiveSelector) {
|
|
double density = mResponsiveSelector->GetSelectedImageDensity();
|
|
MOZ_ASSERT(density >= 0.0);
|
|
height = NSToIntRound(double(height) / density);
|
|
}
|
|
|
|
return height;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HTMLImageElement::GetNaturalHeight(uint32_t* aNaturalHeight)
|
|
{
|
|
*aNaturalHeight = NaturalHeight();
|
|
return NS_OK;
|
|
}
|
|
|
|
uint32_t
|
|
HTMLImageElement::NaturalWidth()
|
|
{
|
|
uint32_t width;
|
|
nsresult rv = nsImageLoadingContent::GetNaturalWidth(&width);
|
|
|
|
if (NS_FAILED(rv)) {
|
|
MOZ_ASSERT(false, "GetNaturalWidth should not fail");
|
|
return 0;
|
|
}
|
|
|
|
if (mResponsiveSelector) {
|
|
double density = mResponsiveSelector->GetSelectedImageDensity();
|
|
MOZ_ASSERT(density >= 0.0);
|
|
width = NSToIntRound(double(width) / density);
|
|
}
|
|
|
|
return width;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HTMLImageElement::GetNaturalWidth(uint32_t* aNaturalWidth)
|
|
{
|
|
*aNaturalWidth = NaturalWidth();
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
HTMLImageElement::CopyInnerTo(Element* aDest, bool aPreallocateChildren)
|
|
{
|
|
bool destIsStatic = aDest->OwnerDoc()->IsStaticDocument();
|
|
auto dest = static_cast<HTMLImageElement*>(aDest);
|
|
if (destIsStatic) {
|
|
CreateStaticImageClone(dest);
|
|
}
|
|
|
|
nsresult rv = nsGenericHTMLElement::CopyInnerTo(aDest, aPreallocateChildren);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if (!destIsStatic) {
|
|
// In SetAttr (called from nsGenericHTMLElement::CopyInnerTo), dest skipped
|
|
// doing the image load because we passed in false for aNotify. But we
|
|
// really do want it to do the load, so set it up to happen once the cloning
|
|
// reaches a stable state.
|
|
if (!dest->InResponsiveMode() &&
|
|
dest->HasAttr(kNameSpaceID_None, nsGkAtoms::src) &&
|
|
dest->OwnerDoc()->IsCurrentActiveDocument()) {
|
|
// Mark channel as urgent-start before load image if the image load is
|
|
// initaiated by a user interaction.
|
|
mUseUrgentStartForChannel = EventStateManager::IsHandlingUserInput();
|
|
|
|
nsContentUtils::AddScriptRunner(
|
|
NewRunnableMethod<bool>("dom::HTMLImageElement::MaybeLoadImage",
|
|
dest,
|
|
&HTMLImageElement::MaybeLoadImage,
|
|
false));
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
CORSMode
|
|
HTMLImageElement::GetCORSMode()
|
|
{
|
|
return AttrValueToCORSMode(GetParsedAttr(nsGkAtoms::crossorigin));
|
|
}
|
|
|
|
JSObject*
|
|
HTMLImageElement::WrapNode(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
|
|
{
|
|
return HTMLImageElementBinding::Wrap(aCx, this, aGivenProto);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
nsIDOMHTMLFormElement*
|
|
HTMLImageElement::GetForm() const
|
|
{
|
|
return mForm;
|
|
}
|
|
#endif
|
|
|
|
void
|
|
HTMLImageElement::SetForm(nsIDOMHTMLFormElement* aForm)
|
|
{
|
|
NS_PRECONDITION(aForm, "Don't pass null here");
|
|
NS_ASSERTION(!mForm,
|
|
"We don't support switching from one non-null form to another.");
|
|
|
|
mForm = static_cast<HTMLFormElement*>(aForm);
|
|
}
|
|
|
|
void
|
|
HTMLImageElement::ClearForm(bool aRemoveFromForm)
|
|
{
|
|
NS_ASSERTION((mForm != nullptr) == HasFlag(ADDED_TO_FORM),
|
|
"Form control should have had flag set correctly");
|
|
|
|
if (!mForm) {
|
|
return;
|
|
}
|
|
|
|
if (aRemoveFromForm) {
|
|
nsAutoString nameVal, idVal;
|
|
GetAttr(kNameSpaceID_None, nsGkAtoms::name, nameVal);
|
|
GetAttr(kNameSpaceID_None, nsGkAtoms::id, idVal);
|
|
|
|
mForm->RemoveImageElement(this);
|
|
|
|
if (!nameVal.IsEmpty()) {
|
|
mForm->RemoveImageElementFromTable(this, nameVal);
|
|
}
|
|
|
|
if (!idVal.IsEmpty()) {
|
|
mForm->RemoveImageElementFromTable(this, idVal);
|
|
}
|
|
}
|
|
|
|
UnsetFlags(ADDED_TO_FORM);
|
|
mForm = nullptr;
|
|
}
|
|
|
|
void
|
|
HTMLImageElement::QueueImageLoadTask(bool aAlwaysLoad)
|
|
{
|
|
// If loading is temporarily disabled, we don't want to queue tasks
|
|
// that may then run when loading is re-enabled.
|
|
if (!LoadingEnabled() || !this->OwnerDoc()->IsCurrentActiveDocument()) {
|
|
return;
|
|
}
|
|
|
|
// Ensure that we don't overwrite a previous load request that requires
|
|
// a complete load to occur.
|
|
bool alwaysLoad = aAlwaysLoad;
|
|
if (mPendingImageLoadTask) {
|
|
alwaysLoad = alwaysLoad || mPendingImageLoadTask->AlwaysLoad();
|
|
}
|
|
RefPtr<ImageLoadTask> task = new ImageLoadTask(this,
|
|
alwaysLoad,
|
|
mUseUrgentStartForChannel);
|
|
// The task checks this to determine if it was the last
|
|
// queued event, and so earlier tasks are implicitly canceled.
|
|
mPendingImageLoadTask = task;
|
|
nsContentUtils::RunInStableState(task.forget());
|
|
}
|
|
|
|
bool
|
|
HTMLImageElement::HaveSrcsetOrInPicture()
|
|
{
|
|
if (HasAttr(kNameSpaceID_None, nsGkAtoms::srcset)) {
|
|
return true;
|
|
}
|
|
|
|
Element *parent = nsINode::GetParentElement();
|
|
return (parent && parent->IsHTMLElement(nsGkAtoms::picture));
|
|
}
|
|
|
|
bool
|
|
HTMLImageElement::InResponsiveMode()
|
|
{
|
|
// When we lose srcset or leave a <picture> element, the fallback to img.src
|
|
// will happen from the microtask, and we should behave responsively in the
|
|
// interim
|
|
return mResponsiveSelector ||
|
|
mPendingImageLoadTask ||
|
|
HaveSrcsetOrInPicture();
|
|
}
|
|
|
|
bool
|
|
HTMLImageElement::SelectedSourceMatchesLast(nsIURI* aSelectedSource, double aSelectedDensity)
|
|
{
|
|
// If there was no selected source previously, we don't want to short-circuit the load.
|
|
// Similarly for if there is no newly selected source.
|
|
if (!mLastSelectedSource || !aSelectedSource) {
|
|
return false;
|
|
}
|
|
bool equal = false;
|
|
return NS_SUCCEEDED(mLastSelectedSource->Equals(aSelectedSource, &equal)) && equal &&
|
|
aSelectedDensity == mCurrentDensity;
|
|
}
|
|
|
|
nsresult
|
|
HTMLImageElement::LoadSelectedImage(bool aForce, bool aNotify, bool aAlwaysLoad)
|
|
{
|
|
nsresult rv = NS_ERROR_FAILURE;
|
|
|
|
if (aForce) {
|
|
// In responsive mode we generally want to re-run the full
|
|
// selection algorithm whenever starting a new load, per
|
|
// spec. This also causes us to re-resolve the URI as appropriate.
|
|
if (!UpdateResponsiveSource() && !aAlwaysLoad) {
|
|
return NS_OK;
|
|
}
|
|
}
|
|
|
|
nsCOMPtr<nsIURI> selectedSource;
|
|
double currentDensity = 1.0; // default to 1.0 for the src attribute case
|
|
if (mResponsiveSelector) {
|
|
nsCOMPtr<nsIURI> url = mResponsiveSelector->GetSelectedImageURL();
|
|
selectedSource = url;
|
|
currentDensity = mResponsiveSelector->GetSelectedImageDensity();
|
|
if (!aAlwaysLoad && SelectedSourceMatchesLast(selectedSource, currentDensity)) {
|
|
return NS_OK;
|
|
}
|
|
if (url) {
|
|
rv = LoadImage(url, aForce, aNotify, eImageLoadType_Imageset);
|
|
}
|
|
} else {
|
|
nsAutoString src;
|
|
if (!GetAttr(kNameSpaceID_None, nsGkAtoms::src, src)) {
|
|
CancelImageRequests(aNotify);
|
|
rv = NS_OK;
|
|
} else {
|
|
nsIDocument* doc = GetOurOwnerDoc();
|
|
if (doc) {
|
|
StringToURI(src, doc, getter_AddRefs(selectedSource));
|
|
if (!aAlwaysLoad && SelectedSourceMatchesLast(selectedSource, currentDensity)) {
|
|
return NS_OK;
|
|
}
|
|
}
|
|
|
|
// If we have a srcset attribute or are in a <picture> element,
|
|
// we always use the Imageset load type, even if we parsed no
|
|
// valid responsive sources from either, per spec.
|
|
rv = LoadImage(src, aForce, aNotify,
|
|
HaveSrcsetOrInPicture() ? eImageLoadType_Imageset
|
|
: eImageLoadType_Normal);
|
|
}
|
|
}
|
|
mLastSelectedSource = selectedSource;
|
|
mCurrentDensity = currentDensity;
|
|
|
|
if (NS_FAILED(rv)) {
|
|
CancelImageRequests(aNotify);
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
void
|
|
HTMLImageElement::PictureSourceSrcsetChanged(nsIContent *aSourceNode,
|
|
const nsAString& aNewValue,
|
|
bool aNotify)
|
|
{
|
|
MOZ_ASSERT(aSourceNode == this ||
|
|
IsPreviousSibling(aSourceNode, this),
|
|
"Should not be getting notifications for non-previous-siblings");
|
|
|
|
nsIContent *currentSrc =
|
|
mResponsiveSelector ? mResponsiveSelector->Content() : nullptr;
|
|
|
|
if (aSourceNode == currentSrc) {
|
|
// We're currently using this node as our responsive selector
|
|
// source.
|
|
mResponsiveSelector->SetCandidatesFromSourceSet(aNewValue);
|
|
}
|
|
|
|
if (!mInDocResponsiveContent && IsInComposedDoc()) {
|
|
nsIDocument* doc = GetOurOwnerDoc();
|
|
if (doc) {
|
|
doc->AddResponsiveContent(this);
|
|
mInDocResponsiveContent = true;
|
|
}
|
|
}
|
|
|
|
// This always triggers the image update steps per the spec, even if
|
|
// we are not using this source.
|
|
QueueImageLoadTask(true);
|
|
}
|
|
|
|
void
|
|
HTMLImageElement::PictureSourceSizesChanged(nsIContent *aSourceNode,
|
|
const nsAString& aNewValue,
|
|
bool aNotify)
|
|
{
|
|
MOZ_ASSERT(aSourceNode == this ||
|
|
IsPreviousSibling(aSourceNode, this),
|
|
"Should not be getting notifications for non-previous-siblings");
|
|
|
|
nsIContent *currentSrc =
|
|
mResponsiveSelector ? mResponsiveSelector->Content() : nullptr;
|
|
|
|
if (aSourceNode == currentSrc) {
|
|
// We're currently using this node as our responsive selector
|
|
// source.
|
|
mResponsiveSelector->SetSizesFromDescriptor(aNewValue);
|
|
}
|
|
|
|
// This always triggers the image update steps per the spec, even if
|
|
// we are not using this source.
|
|
QueueImageLoadTask(true);
|
|
}
|
|
|
|
void
|
|
HTMLImageElement::PictureSourceMediaOrTypeChanged(nsIContent *aSourceNode,
|
|
bool aNotify)
|
|
{
|
|
MOZ_ASSERT(IsPreviousSibling(aSourceNode, this),
|
|
"Should not be getting notifications for non-previous-siblings");
|
|
|
|
// This always triggers the image update steps per the spec, even if
|
|
// we are not switching to/from this source
|
|
QueueImageLoadTask(true);
|
|
}
|
|
|
|
void
|
|
HTMLImageElement::PictureSourceAdded(nsIContent *aSourceNode)
|
|
{
|
|
MOZ_ASSERT(aSourceNode == this ||
|
|
IsPreviousSibling(aSourceNode, this),
|
|
"Should not be getting notifications for non-previous-siblings");
|
|
|
|
QueueImageLoadTask(true);
|
|
}
|
|
|
|
void
|
|
HTMLImageElement::PictureSourceRemoved(nsIContent *aSourceNode)
|
|
{
|
|
MOZ_ASSERT(aSourceNode == this ||
|
|
IsPreviousSibling(aSourceNode, this),
|
|
"Should not be getting notifications for non-previous-siblings");
|
|
|
|
QueueImageLoadTask(true);
|
|
}
|
|
|
|
bool
|
|
HTMLImageElement::UpdateResponsiveSource()
|
|
{
|
|
bool hadSelector = !!mResponsiveSelector;
|
|
|
|
nsIContent *currentSource =
|
|
mResponsiveSelector ? mResponsiveSelector->Content() : nullptr;
|
|
Element *parent = nsINode::GetParentElement();
|
|
|
|
nsINode *candidateSource = nullptr;
|
|
if (parent && parent->IsHTMLElement(nsGkAtoms::picture)) {
|
|
// Walk source nodes previous to ourselves
|
|
candidateSource = parent->GetFirstChild();
|
|
} else {
|
|
candidateSource = this;
|
|
}
|
|
|
|
while (candidateSource) {
|
|
if (candidateSource == currentSource) {
|
|
// found no better source before current, re-run selection on
|
|
// that and keep it if it's still usable.
|
|
bool changed = mResponsiveSelector->SelectImage(true);
|
|
if (mResponsiveSelector->NumCandidates()) {
|
|
bool isUsableCandidate = true;
|
|
|
|
// an otherwise-usable source element may still have a media query that may not
|
|
// match any more.
|
|
if (candidateSource->IsHTMLElement(nsGkAtoms::source) &&
|
|
!SourceElementMatches(candidateSource->AsContent())) {
|
|
isUsableCandidate = false;
|
|
}
|
|
|
|
if (isUsableCandidate) {
|
|
return changed;
|
|
}
|
|
}
|
|
|
|
// no longer valid
|
|
mResponsiveSelector = nullptr;
|
|
if (candidateSource == this) {
|
|
// No further possibilities
|
|
break;
|
|
}
|
|
} else if (candidateSource == this) {
|
|
// We are the last possible source
|
|
if (!TryCreateResponsiveSelector(candidateSource->AsContent())) {
|
|
// Failed to find any source
|
|
mResponsiveSelector = nullptr;
|
|
}
|
|
break;
|
|
} else if (candidateSource->IsHTMLElement(nsGkAtoms::source) &&
|
|
TryCreateResponsiveSelector(candidateSource->AsContent())) {
|
|
// This led to a valid source, stop
|
|
break;
|
|
}
|
|
candidateSource = candidateSource->GetNextSibling();
|
|
}
|
|
|
|
if (!candidateSource) {
|
|
// Ran out of siblings without finding ourself, e.g. XBL magic.
|
|
mResponsiveSelector = nullptr;
|
|
}
|
|
|
|
// If we reach this point, either:
|
|
// - there was no selector originally, and there is not one now
|
|
// - there was no selector originally, and there is one now
|
|
// - there was a selector, and there is a different one now
|
|
// - there was a selector, and there is not one now
|
|
return hadSelector || mResponsiveSelector;
|
|
}
|
|
|
|
/*static */ bool
|
|
HTMLImageElement::SupportedPictureSourceType(const nsAString& aType)
|
|
{
|
|
nsAutoString type;
|
|
nsAutoString params;
|
|
|
|
nsContentUtils::SplitMimeType(aType, type, params);
|
|
if (type.IsEmpty()) {
|
|
return true;
|
|
}
|
|
|
|
return
|
|
imgLoader::SupportImageWithMimeType(NS_ConvertUTF16toUTF8(type).get(),
|
|
AcceptedMimeTypes::IMAGES_AND_DOCUMENTS);
|
|
}
|
|
|
|
bool
|
|
HTMLImageElement::SourceElementMatches(nsIContent* aSourceNode)
|
|
{
|
|
MOZ_ASSERT(aSourceNode->IsHTMLElement(nsGkAtoms::source));
|
|
|
|
DebugOnly<Element *> parent(nsINode::GetParentElement());
|
|
MOZ_ASSERT(parent && parent->IsHTMLElement(nsGkAtoms::picture));
|
|
MOZ_ASSERT(IsPreviousSibling(aSourceNode, this));
|
|
|
|
// Check media and type
|
|
HTMLSourceElement *src = static_cast<HTMLSourceElement*>(aSourceNode);
|
|
if (!src->MatchesCurrentMedia()) {
|
|
return false;
|
|
}
|
|
|
|
nsAutoString type;
|
|
if (aSourceNode->GetAttr(kNameSpaceID_None, nsGkAtoms::type, type) &&
|
|
!SupportedPictureSourceType(type)) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
HTMLImageElement::TryCreateResponsiveSelector(nsIContent *aSourceNode)
|
|
{
|
|
// Skip if this is not a <source> with matching media query
|
|
bool isSourceTag = aSourceNode->IsHTMLElement(nsGkAtoms::source);
|
|
if (isSourceTag) {
|
|
if (!SourceElementMatches(aSourceNode)) {
|
|
return false;
|
|
}
|
|
} else if (aSourceNode->IsHTMLElement(nsGkAtoms::img)) {
|
|
// Otherwise this is the <img> tag itself
|
|
MOZ_ASSERT(aSourceNode == this);
|
|
}
|
|
|
|
// Skip if has no srcset or an empty srcset
|
|
nsString srcset;
|
|
if (!aSourceNode->GetAttr(kNameSpaceID_None, nsGkAtoms::srcset, srcset)) {
|
|
return false;
|
|
}
|
|
|
|
if (srcset.IsEmpty()) {
|
|
return false;
|
|
}
|
|
|
|
|
|
// Try to parse
|
|
RefPtr<ResponsiveImageSelector> sel = new ResponsiveImageSelector(aSourceNode);
|
|
if (!sel->SetCandidatesFromSourceSet(srcset)) {
|
|
// No possible candidates, don't need to bother parsing sizes
|
|
return false;
|
|
}
|
|
|
|
nsAutoString sizes;
|
|
aSourceNode->GetAttr(kNameSpaceID_None, nsGkAtoms::sizes, sizes);
|
|
sel->SetSizesFromDescriptor(sizes);
|
|
|
|
// If this is the <img> tag, also pull in src as the default source
|
|
if (!isSourceTag) {
|
|
MOZ_ASSERT(aSourceNode == this);
|
|
nsAutoString src;
|
|
if (GetAttr(kNameSpaceID_None, nsGkAtoms::src, src) && !src.IsEmpty()) {
|
|
sel->SetDefaultSource(src);
|
|
}
|
|
}
|
|
|
|
mResponsiveSelector = sel;
|
|
return true;
|
|
}
|
|
|
|
/* static */ bool
|
|
HTMLImageElement::SelectSourceForTagWithAttrs(nsIDocument *aDocument,
|
|
bool aIsSourceTag,
|
|
const nsAString& aSrcAttr,
|
|
const nsAString& aSrcsetAttr,
|
|
const nsAString& aSizesAttr,
|
|
const nsAString& aTypeAttr,
|
|
const nsAString& aMediaAttr,
|
|
nsAString& aResult)
|
|
{
|
|
MOZ_ASSERT(aIsSourceTag || (aTypeAttr.IsEmpty() && aMediaAttr.IsEmpty()),
|
|
"Passing type or media attrs makes no sense without aIsSourceTag");
|
|
MOZ_ASSERT(!aIsSourceTag || aSrcAttr.IsEmpty(),
|
|
"Passing aSrcAttr makes no sense with aIsSourceTag set");
|
|
|
|
if (aSrcsetAttr.IsEmpty()) {
|
|
if (!aIsSourceTag) {
|
|
// For an <img> with no srcset, we would always select the src attr.
|
|
aResult.Assign(aSrcAttr);
|
|
return true;
|
|
}
|
|
// Otherwise, a <source> without srcset is never selected
|
|
return false;
|
|
}
|
|
|
|
// Would not consider source tags with unsupported media or type
|
|
if (aIsSourceTag &&
|
|
((!aMediaAttr.IsVoid() &&
|
|
!HTMLSourceElement::WouldMatchMediaForDocument(aMediaAttr, aDocument)) ||
|
|
(!aTypeAttr.IsVoid() &&
|
|
!SupportedPictureSourceType(aTypeAttr)))) {
|
|
return false;
|
|
}
|
|
|
|
// Using srcset or picture <source>, build a responsive selector for this tag.
|
|
RefPtr<ResponsiveImageSelector> sel =
|
|
new ResponsiveImageSelector(aDocument);
|
|
|
|
sel->SetCandidatesFromSourceSet(aSrcsetAttr);
|
|
if (!aSizesAttr.IsEmpty()) {
|
|
sel->SetSizesFromDescriptor(aSizesAttr);
|
|
}
|
|
if (!aIsSourceTag) {
|
|
sel->SetDefaultSource(aSrcAttr);
|
|
}
|
|
|
|
if (sel->GetSelectedImageURLSpec(aResult)) {
|
|
return true;
|
|
}
|
|
|
|
if (!aIsSourceTag) {
|
|
// <img> tag with no match would definitively load nothing.
|
|
aResult.Truncate();
|
|
return true;
|
|
}
|
|
|
|
// <source> tags with no match would leave source yet-undetermined.
|
|
return false;
|
|
}
|
|
|
|
void
|
|
HTMLImageElement::DestroyContent()
|
|
{
|
|
mResponsiveSelector = nullptr;
|
|
|
|
nsGenericHTMLElement::DestroyContent();
|
|
}
|
|
|
|
void
|
|
HTMLImageElement::MediaFeatureValuesChanged()
|
|
{
|
|
QueueImageLoadTask(false);
|
|
}
|
|
|
|
void
|
|
HTMLImageElement::FlushUseCounters()
|
|
{
|
|
nsCOMPtr<imgIRequest> request;
|
|
GetRequest(CURRENT_REQUEST, getter_AddRefs(request));
|
|
|
|
nsCOMPtr<imgIContainer> container;
|
|
request->GetImage(getter_AddRefs(container));
|
|
|
|
static_cast<image::Image*>(container.get())->ReportUseCounters();
|
|
}
|
|
|
|
} // namespace dom
|
|
} // namespace mozilla
|
|
|