diff options
Diffstat (limited to 'dom/html/HTMLSourceElement.cpp')
| -rw-r--r-- | dom/html/HTMLSourceElement.cpp | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/dom/html/HTMLSourceElement.cpp b/dom/html/HTMLSourceElement.cpp new file mode 100644 index 0000000000..ebdf916952 --- /dev/null +++ b/dom/html/HTMLSourceElement.cpp @@ -0,0 +1,235 @@ +/* -*- 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/. */ + +#include "mozilla/dom/HTMLSourceElement.h" +#include "mozilla/dom/HTMLSourceElementBinding.h" + +#include "mozilla/dom/DocumentInlines.h" +#include "mozilla/dom/HTMLImageElement.h" +#include "mozilla/dom/HTMLMediaElement.h" +#include "mozilla/dom/ResponsiveImageSelector.h" +#include "mozilla/dom/MediaList.h" +#include "mozilla/dom/MediaSource.h" + +#include "mozilla/dom/BlobURLProtocolHandler.h" +#include "mozilla/Preferences.h" + +#include "nsGkAtoms.h" +#include "nsHTMLStyleSheet.h" +#include "nsMappedAttributes.h" + +NS_IMPL_NS_NEW_HTML_ELEMENT(Source) + +namespace mozilla::dom { + +HTMLSourceElement::HTMLSourceElement( + already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo) + : nsGenericHTMLElement(std::move(aNodeInfo)) {} + +HTMLSourceElement::~HTMLSourceElement() = default; + +NS_IMPL_CYCLE_COLLECTION_INHERITED(HTMLSourceElement, nsGenericHTMLElement, + mSrcMediaSource) + +NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED_0(HTMLSourceElement, + nsGenericHTMLElement) + +NS_IMPL_ELEMENT_CLONE(HTMLSourceElement) + +bool HTMLSourceElement::MatchesCurrentMedia() { + if (mMediaList) { + return mMediaList->Matches(*OwnerDoc()); + } + + // No media specified + return true; +} + +/* static */ +bool HTMLSourceElement::WouldMatchMediaForDocument(const nsAString& aMedia, + const Document* aDocument) { + if (aMedia.IsEmpty()) { + return true; + } + + RefPtr<MediaList> mediaList = + MediaList::Create(NS_ConvertUTF16toUTF8(aMedia)); + return mediaList->Matches(*aDocument); +} + +void HTMLSourceElement::UpdateMediaList(const nsAttrValue* aValue) { + mMediaList = nullptr; + if (!aValue) { + return; + } + + NS_ConvertUTF16toUTF8 mediaStr(aValue->GetStringValue()); + mMediaList = MediaList::Create(mediaStr); +} + +bool HTMLSourceElement::ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute, + const nsAString& aValue, + nsIPrincipal* aMaybeScriptedPrincipal, + nsAttrValue& aResult) { + if (StaticPrefs::dom_picture_source_dimension_attributes_enabled() && + aNamespaceID == kNameSpaceID_None && + (aAttribute == nsGkAtoms::width || aAttribute == nsGkAtoms::height)) { + return aResult.ParseHTMLDimension(aValue); + } + + return nsGenericHTMLElement::ParseAttribute(aNamespaceID, aAttribute, aValue, + aMaybeScriptedPrincipal, aResult); +} + +void HTMLSourceElement::AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName, + const nsAttrValue* aValue, + const nsAttrValue* aOldValue, + nsIPrincipal* aMaybeScriptedPrincipal, + bool aNotify) { + if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::srcset) { + mSrcsetTriggeringPrincipal = nsContentUtils::GetAttrTriggeringPrincipal( + this, aValue ? aValue->GetStringValue() : EmptyString(), + aMaybeScriptedPrincipal); + } + // If we are associated with a <picture> with a valid <img>, notify it of + // responsive parameter changes + if (aNameSpaceID == kNameSpaceID_None && + (aName == nsGkAtoms::srcset || aName == nsGkAtoms::sizes || + aName == nsGkAtoms::media || aName == nsGkAtoms::type) && + IsInPicture()) { + if (aName == nsGkAtoms::media) { + UpdateMediaList(aValue); + } + + nsString strVal = aValue ? aValue->GetStringValue() : EmptyString(); + // Find all img siblings after this <source> and notify them of the change + nsCOMPtr<nsIContent> sibling = AsContent(); + while ((sibling = sibling->GetNextSibling())) { + if (auto* img = HTMLImageElement::FromNode(sibling)) { + if (aName == nsGkAtoms::srcset) { + img->PictureSourceSrcsetChanged(this, strVal, aNotify); + } else if (aName == nsGkAtoms::sizes) { + img->PictureSourceSizesChanged(this, strVal, aNotify); + } else if (aName == nsGkAtoms::media || aName == nsGkAtoms::type) { + img->PictureSourceMediaOrTypeChanged(this, aNotify); + } + } + } + } else if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::media) { + UpdateMediaList(aValue); + } else if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::src) { + mSrcTriggeringPrincipal = nsContentUtils::GetAttrTriggeringPrincipal( + this, aValue ? aValue->GetStringValue() : EmptyString(), + aMaybeScriptedPrincipal); + mSrcMediaSource = nullptr; + if (aValue) { + nsString srcStr = aValue->GetStringValue(); + nsCOMPtr<nsIURI> uri; + NewURIFromString(srcStr, getter_AddRefs(uri)); + if (uri && IsMediaSourceURI(uri)) { + NS_GetSourceForMediaSourceURI(uri, getter_AddRefs(mSrcMediaSource)); + } + } + } else if (StaticPrefs::dom_picture_source_dimension_attributes_enabled() && + aNameSpaceID == kNameSpaceID_None && + IsAttributeMappedToImages(aName) && IsInPicture()) { + BuildMappedAttributesForImage(); + + nsCOMPtr<nsIContent> sibling = AsContent(); + while ((sibling = sibling->GetNextSibling())) { + if (auto* img = HTMLImageElement::FromNode(sibling)) { + img->PictureSourceDimensionChanged(this, aNotify); + } + } + } + + return nsGenericHTMLElement::AfterSetAttr( + aNameSpaceID, aName, aValue, aOldValue, aMaybeScriptedPrincipal, aNotify); +} + +nsresult HTMLSourceElement::BindToTree(BindContext& aContext, + nsINode& aParent) { + nsresult rv = nsGenericHTMLElement::BindToTree(aContext, aParent); + NS_ENSURE_SUCCESS(rv, rv); + + if (auto* media = HTMLMediaElement::FromNode(aParent)) { + media->NotifyAddedSource(); + } + + if (aParent.IsHTMLElement(nsGkAtoms::picture)) { + BuildMappedAttributesForImage(); + } else { + mMappedAttributesForImage = nullptr; + } + + return NS_OK; +} + +void HTMLSourceElement::UnbindFromTree(bool aNullParent) { + mMappedAttributesForImage = nullptr; + nsGenericHTMLElement::UnbindFromTree(aNullParent); +} + +JSObject* HTMLSourceElement::WrapNode(JSContext* aCx, + JS::Handle<JSObject*> aGivenProto) { + return HTMLSourceElement_Binding::Wrap(aCx, this, aGivenProto); +} + +void HTMLSourceElement::BuildMappedAttributesForImage() { + MOZ_ASSERT(NS_IsMainThread()); + + if (!StaticPrefs::dom_picture_source_dimension_attributes_enabled()) { + return; + } + + mMappedAttributesForImage = nullptr; + + Document* document = GetComposedDoc(); + nsHTMLStyleSheet* sheet = + document ? document->GetAttributeStyleSheet() : nullptr; + if (!sheet) { + return; + } + + const nsAttrValue* width = mAttrs.GetAttr(nsGkAtoms::width); + const nsAttrValue* height = mAttrs.GetAttr(nsGkAtoms::height); + if (!width && !height) { + return; + } + + const size_t count = (width ? 1 : 0) + (height ? 1 : 0); + RefPtr<nsMappedAttributes> modifiableMapped(new (count) nsMappedAttributes( + sheet, nsGenericHTMLElement::MapPictureSourceSizeAttributesInto)); + MOZ_ASSERT(modifiableMapped); + + auto maybeSetAttr = [&](nsAtom* aName, const nsAttrValue* aValue) { + if (!aValue) { + return; + } + nsAttrValue val(*aValue); + bool oldValueSet = false; + modifiableMapped->SetAndSwapAttr(aName, val, &oldValueSet); + }; + maybeSetAttr(nsGkAtoms::width, width); + maybeSetAttr(nsGkAtoms::height, height); + + RefPtr<nsMappedAttributes> newAttrs = + sheet->UniqueMappedAttributes(modifiableMapped); + NS_ENSURE_TRUE_VOID(newAttrs); + + if (newAttrs != modifiableMapped) { + // Reset the stylesheet of modifiableMapped so that it doesn't + // spend time trying to remove itself from the hash. There is no + // risk that modifiableMapped is in the hash since we created + // it ourselves and it didn't come from the stylesheet (in which + // case it would not have been modifiable). + modifiableMapped->DropStyleSheetReference(); + } + + mMappedAttributesForImage = std::move(newAttrs); +} + +} // namespace mozilla::dom |