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7bddcf9e5a
Instead, lazily schedule evaluation of them before styling, much like we were doing for SVG. A subtle tweak is that we only remain scheduled while in the document. This allows us to use the "in document" bit plus the "mapped attributes dirty" bit to know our scheduled status. It also prevents doing silly work for disconnected elements, and having to do hashmap lookups on adoption and node destruction. Differential Revision: https://phabricator.services.mozilla.com/D181549
237 lines
8.2 KiB
C++
237 lines
8.2 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/HTMLSourceElement.h"
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#include "mozilla/dom/HTMLSourceElementBinding.h"
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#include "mozilla/dom/DocumentInlines.h"
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#include "mozilla/dom/HTMLImageElement.h"
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#include "mozilla/dom/HTMLMediaElement.h"
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#include "mozilla/dom/ResponsiveImageSelector.h"
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#include "mozilla/dom/MediaList.h"
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#include "mozilla/dom/MediaSource.h"
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#include "mozilla/dom/BlobURLProtocolHandler.h"
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#include "mozilla/AttributeStyles.h"
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#include "mozilla/MappedDeclarationsBuilder.h"
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#include "mozilla/Preferences.h"
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#include "nsGkAtoms.h"
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NS_IMPL_NS_NEW_HTML_ELEMENT(Source)
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namespace mozilla::dom {
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HTMLSourceElement::HTMLSourceElement(
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already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
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: nsGenericHTMLElement(std::move(aNodeInfo)) {}
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HTMLSourceElement::~HTMLSourceElement() = default;
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NS_IMPL_CYCLE_COLLECTION_INHERITED(HTMLSourceElement, nsGenericHTMLElement,
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mSrcMediaSource)
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NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED_0(HTMLSourceElement,
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nsGenericHTMLElement)
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NS_IMPL_ELEMENT_CLONE(HTMLSourceElement)
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bool HTMLSourceElement::MatchesCurrentMedia() {
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if (mMediaList) {
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return mMediaList->Matches(*OwnerDoc());
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}
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// No media specified
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return true;
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}
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/* static */
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bool HTMLSourceElement::WouldMatchMediaForDocument(const nsAString& aMedia,
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const Document* aDocument) {
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if (aMedia.IsEmpty()) {
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return true;
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}
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RefPtr<MediaList> mediaList =
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MediaList::Create(NS_ConvertUTF16toUTF8(aMedia));
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return mediaList->Matches(*aDocument);
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}
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void HTMLSourceElement::UpdateMediaList(const nsAttrValue* aValue) {
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mMediaList = nullptr;
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if (!aValue) {
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return;
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}
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NS_ConvertUTF16toUTF8 mediaStr(aValue->GetStringValue());
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mMediaList = MediaList::Create(mediaStr);
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}
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bool HTMLSourceElement::ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
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const nsAString& aValue,
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nsIPrincipal* aMaybeScriptedPrincipal,
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nsAttrValue& aResult) {
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if (StaticPrefs::dom_picture_source_dimension_attributes_enabled() &&
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aNamespaceID == kNameSpaceID_None &&
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(aAttribute == nsGkAtoms::width || aAttribute == nsGkAtoms::height)) {
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return aResult.ParseHTMLDimension(aValue);
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}
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return nsGenericHTMLElement::ParseAttribute(aNamespaceID, aAttribute, aValue,
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aMaybeScriptedPrincipal, aResult);
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}
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void HTMLSourceElement::AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName,
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const nsAttrValue* aValue,
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const nsAttrValue* aOldValue,
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nsIPrincipal* aMaybeScriptedPrincipal,
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bool aNotify) {
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if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::srcset) {
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mSrcsetTriggeringPrincipal = nsContentUtils::GetAttrTriggeringPrincipal(
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this, aValue ? aValue->GetStringValue() : EmptyString(),
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aMaybeScriptedPrincipal);
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}
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// If we are associated with a <picture> with a valid <img>, notify it of
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// responsive parameter changes
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if (aNameSpaceID == kNameSpaceID_None &&
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(aName == nsGkAtoms::srcset || aName == nsGkAtoms::sizes ||
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aName == nsGkAtoms::media || aName == nsGkAtoms::type) &&
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IsInPicture()) {
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if (aName == nsGkAtoms::media) {
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UpdateMediaList(aValue);
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}
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nsString strVal = aValue ? aValue->GetStringValue() : EmptyString();
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// Find all img siblings after this <source> and notify them of the change
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nsCOMPtr<nsIContent> sibling = AsContent();
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while ((sibling = sibling->GetNextSibling())) {
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if (auto* img = HTMLImageElement::FromNode(sibling)) {
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if (aName == nsGkAtoms::srcset) {
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img->PictureSourceSrcsetChanged(this, strVal, aNotify);
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} else if (aName == nsGkAtoms::sizes) {
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img->PictureSourceSizesChanged(this, strVal, aNotify);
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} else if (aName == nsGkAtoms::media || aName == nsGkAtoms::type) {
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img->PictureSourceMediaOrTypeChanged(this, aNotify);
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}
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}
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}
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} else if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::media) {
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UpdateMediaList(aValue);
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} else if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::src) {
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mSrcTriggeringPrincipal = nsContentUtils::GetAttrTriggeringPrincipal(
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this, aValue ? aValue->GetStringValue() : EmptyString(),
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aMaybeScriptedPrincipal);
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mSrcMediaSource = nullptr;
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if (aValue) {
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nsString srcStr = aValue->GetStringValue();
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nsCOMPtr<nsIURI> uri;
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NewURIFromString(srcStr, getter_AddRefs(uri));
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if (uri && IsMediaSourceURI(uri)) {
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NS_GetSourceForMediaSourceURI(uri, getter_AddRefs(mSrcMediaSource));
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}
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}
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} else if (StaticPrefs::dom_picture_source_dimension_attributes_enabled() &&
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aNameSpaceID == kNameSpaceID_None &&
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IsAttributeMappedToImages(aName) && IsInPicture()) {
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BuildMappedAttributesForImage();
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nsCOMPtr<nsIContent> sibling = AsContent();
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while ((sibling = sibling->GetNextSibling())) {
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if (auto* img = HTMLImageElement::FromNode(sibling)) {
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img->PictureSourceDimensionChanged(this, aNotify);
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}
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}
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}
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return nsGenericHTMLElement::AfterSetAttr(
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aNameSpaceID, aName, aValue, aOldValue, aMaybeScriptedPrincipal, aNotify);
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}
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nsresult HTMLSourceElement::BindToTree(BindContext& aContext,
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nsINode& aParent) {
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nsresult rv = nsGenericHTMLElement::BindToTree(aContext, aParent);
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NS_ENSURE_SUCCESS(rv, rv);
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if (auto* media = HTMLMediaElement::FromNode(aParent)) {
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media->NotifyAddedSource();
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}
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if (aParent.IsHTMLElement(nsGkAtoms::picture)) {
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BuildMappedAttributesForImage();
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} else {
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mMappedAttributesForImage = nullptr;
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}
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return NS_OK;
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}
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void HTMLSourceElement::UnbindFromTree(bool aNullParent) {
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mMappedAttributesForImage = nullptr;
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nsGenericHTMLElement::UnbindFromTree(aNullParent);
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}
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JSObject* HTMLSourceElement::WrapNode(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) {
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return HTMLSourceElement_Binding::Wrap(aCx, this, aGivenProto);
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}
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/**
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* Helper to map the image source attributes.
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* Note: This will override the declaration created by the presentation
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* attributes of HTMLImageElement (i.e. mapped by MapImageSizeAttributeInto).
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* https://html.spec.whatwg.org/multipage/embedded-content.html#the-source-element
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*/
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void HTMLSourceElement::BuildMappedAttributesForImage() {
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MOZ_ASSERT(NS_IsMainThread());
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if (!StaticPrefs::dom_picture_source_dimension_attributes_enabled()) {
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return;
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}
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mMappedAttributesForImage = nullptr;
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Document* document = GetComposedDoc();
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if (!document) {
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return;
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}
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const nsAttrValue* width = mAttrs.GetAttr(nsGkAtoms::width);
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const nsAttrValue* height = mAttrs.GetAttr(nsGkAtoms::height);
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if (!width && !height) {
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return;
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}
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MappedDeclarationsBuilder builder(*this, *document);
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// We should set the missing property values with auto value to make sure it
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// overrides the declaration created by the presentation attributes of
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// HTMLImageElement. This can make sure we compute the ratio-dependent axis
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// size properly by the natural aspect-ratio of the image.
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//
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// Note: The spec doesn't specify this, so we follow the implementation in
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// other browsers.
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// Spec issue: https://github.com/whatwg/html/issues/8178.
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if (width) {
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MapDimensionAttributeInto(builder, eCSSProperty_width, *width);
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} else {
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builder.SetAutoValue(eCSSProperty_width);
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}
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if (height) {
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MapDimensionAttributeInto(builder, eCSSProperty_height, *height);
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} else {
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builder.SetAutoValue(eCSSProperty_height);
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}
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if (width && height) {
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DoMapAspectRatio(*width, *height, builder);
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} else {
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builder.SetAutoValue(eCSSProperty_aspect_ratio);
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}
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mMappedAttributesForImage = builder.TakeDeclarationBlock();
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}
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} // namespace mozilla::dom
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