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-rw-r--r--dom/html/HTMLSourceElement.cpp235
1 files changed, 235 insertions, 0 deletions
diff --git a/dom/html/HTMLSourceElement.cpp b/dom/html/HTMLSourceElement.cpp
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+++ b/dom/html/HTMLSourceElement.cpp
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+/* -*- 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