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Issue #2736 - Part 5: Re-work img <srcset> attribute.

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Use subject principal as triggering principal in <img> "srcset" attribute.
This commit is contained in:
Moonchild 2025-04-28 19:15:02 +02:00 • committed by roytam1
commit 2bdb9f3d85
5 changed files with 69 additions and 16 deletions
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21
dom/html/HTMLImageElement.cpp
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@ -430,6 +430,7 @@ HTMLImageElement::AfterSetAttr(int32_t aNameSpaceID, nsIAtom* aName,
}
} else if (aName == nsGkAtoms::srcset &&
aNameSpaceID == kNameSpaceID_None) {
mSrcsetTriggeringPrincipal = aMaybeScriptedPrincipal;
PictureSourceSrcsetChanged(this, attrVal.String(), aNotify);
} else if (aName == nsGkAtoms::sizes &&
aNameSpaceID == kNameSpaceID_None) {
@ -481,7 +482,7 @@ HTMLImageElement::AfterMaybeChangeAttr(int32_t aNamespaceID, nsIAtom* aName,
if (InResponsiveMode()) {
if (mResponsiveSelector &&
mResponsiveSelector->Content() == this) {
mResponsiveSelector->SetDefaultSource(aValue.String());
mResponsiveSelector->SetDefaultSource(aValue.String(), mSrcTriggeringPrincipal);
}
QueueImageLoadTask(true);
} else if (aNotify && OwnerDoc()->IsCurrentActiveDocument()) {
@ -1000,13 +1001,14 @@ HTMLImageElement::LoadSelectedImage(bool aForce, bool aNotify, bool aAlwaysLoad)
double currentDensity = 1.0; // default to 1.0 for the src attribute case
if (mResponsiveSelector) {
nsCOMPtr<nsIURI> url = mResponsiveSelector->GetSelectedImageURL();
nsCOMPtr<nsIPrincipal> triggeringPrincipal = mResponsiveSelector->GetSelectedImageTriggeringPrincipal();
selectedSource = url;
currentDensity = mResponsiveSelector->GetSelectedImageDensity();
if (!aAlwaysLoad && SelectedSourceMatchesLast(selectedSource, currentDensity)) {
return NS_OK;
}
if (url) {
rv = LoadImage(url, aForce, aNotify, eImageLoadType_Imageset);
rv = LoadImage(url, aForce, aNotify, eImageLoadType_Imageset, triggeringPrincipal);
}
} else {
nsAutoString src;
@ -1055,7 +1057,11 @@ HTMLImageElement::PictureSourceSrcsetChanged(nsIContent *aSourceNode,
if (aSourceNode == currentSrc) {
// We're currently using this node as our responsive selector
// source.
mResponsiveSelector->SetCandidatesFromSourceSet(aNewValue);
nsCOMPtr<nsIPrincipal> principal;
if (aSourceNode == this) {
principal = mSrcsetTriggeringPrincipal;
}
mResponsiveSelector->SetCandidatesFromSourceSet(aNewValue, principal);
}
if (!mInDocResponsiveContent && IsInComposedDoc()) {
@ -1240,6 +1246,8 @@ HTMLImageElement::SourceElementMatches(nsIContent* aSourceNode)
bool
HTMLImageElement::TryCreateResponsiveSelector(nsIContent *aSourceNode)
{
nsCOMPtr<nsIPrincipal> principal;
// Skip if this is not a <source> with matching media query
bool isSourceTag = aSourceNode->IsHTMLElement(nsGkAtoms::source);
if (isSourceTag) {
@ -1249,6 +1257,7 @@ HTMLImageElement::TryCreateResponsiveSelector(nsIContent *aSourceNode)
} else if (aSourceNode->IsHTMLElement(nsGkAtoms::img)) {
// Otherwise this is the <img> tag itself
MOZ_ASSERT(aSourceNode == this);
principal = mSrcsetTriggeringPrincipal;
}
// Skip if has no srcset or an empty srcset
@ -1264,8 +1273,8 @@ HTMLImageElement::TryCreateResponsiveSelector(nsIContent *aSourceNode)
// Try to parse
RefPtr<ResponsiveImageSelector> sel = new ResponsiveImageSelector(aSourceNode);
if (!sel->SetCandidatesFromSourceSet(srcset)) {
// No possible candidates, don't need to bother parsing sizes
if (!sel->SetCandidatesFromSourceSet(srcset, principal)) {
// No possible candidates; no need to bother parsing sizes
return false;
}
@ -1278,7 +1287,7 @@ HTMLImageElement::TryCreateResponsiveSelector(nsIContent *aSourceNode)
MOZ_ASSERT(aSourceNode == this);
nsAutoString src;
if (GetAttr(kNameSpaceID_None, nsGkAtoms::src, src) && !src.IsEmpty()) {
sel->SetDefaultSource(src);
sel->SetDefaultSource(src, mSrcTriggeringPrincipal);
}
}