Source code
Revision control
Copy as Markdown
Other Tools
/* -*- 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
#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/AttributeStyles.h"
#include "mozilla/MappedDeclarationsBuilder.h"
#include "mozilla/Preferences.h"
#include "nsGkAtoms.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 (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 (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(UnbindContext& aContext) {
mMappedAttributesForImage = nullptr;
nsGenericHTMLElement::UnbindFromTree(aContext);
}
JSObject* HTMLSourceElement::WrapNode(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return HTMLSourceElement_Binding::Wrap(aCx, this, aGivenProto);
}
/**
* Helper to map the image source attributes.
* Note: This will override the declaration created by the presentation
* attributes of HTMLImageElement (i.e. mapped by MapImageSizeAttributeInto).
*/
void HTMLSourceElement::BuildMappedAttributesForImage() {
MOZ_ASSERT(NS_IsMainThread());
mMappedAttributesForImage = nullptr;
Document* document = GetComposedDoc();
if (!document) {
return;
}
const nsAttrValue* width = mAttrs.GetAttr(nsGkAtoms::width);
const nsAttrValue* height = mAttrs.GetAttr(nsGkAtoms::height);
if (!width && !height) {
return;
}
MappedDeclarationsBuilder builder(*this, *document);
// We should set the missing property values with auto value to make sure it
// overrides the declaration created by the presentation attributes of
// HTMLImageElement. This can make sure we compute the ratio-dependent axis
// size properly by the natural aspect-ratio of the image.
//
// Note: The spec doesn't specify this, so we follow the implementation in
// other browsers.
if (width) {
MapDimensionAttributeInto(builder, eCSSProperty_width, *width);
} else {
builder.SetAutoValue(eCSSProperty_width);
}
if (height) {
MapDimensionAttributeInto(builder, eCSSProperty_height, *height);
} else {
builder.SetAutoValue(eCSSProperty_height);
}
if (width && height) {
DoMapAspectRatio(*width, *height, builder);
} else {
builder.SetAutoValue(eCSSProperty_aspect_ratio);
}
mMappedAttributesForImage = builder.TakeDeclarationBlock();
}
} // namespace mozilla::dom