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Issue #2135 - Bug 1425864: Ensure printing documents which have shadow DOM works

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This commit is contained in:
FranklinDM 2023-03-04 19:17:22 +08:00 • committed by roytam1
commit 015148fcc3
3 changed files with 47 additions and 2 deletions
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17
dom/base/ShadowRoot.cpp
View file

@ -101,6 +101,23 @@ ShadowRoot::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
return mozilla::dom::ShadowRootBinding::Wrap(aCx, this, aGivenProto);
}
void
ShadowRoot::CloneInternalDataFrom(ShadowRoot* aOther)
{
size_t sheetCount = aOther->SheetCount();
for (size_t i = 0; i < sheetCount; ++i) {
StyleSheet* sheet = aOther->SheetAt(i);
if (sheet && sheet->IsApplicable()) {
// TODO: Remove AsGecko() call once Stylo is removed.
RefPtr<CSSStyleSheet> clonedSheet =
sheet->AsGecko()->Clone(nullptr, nullptr, nullptr, nullptr);
if (clonedSheet) {
AppendStyleSheet(*clonedSheet);
}
}
}
}
ShadowRoot*
ShadowRoot::FromNode(nsINode* aNode)
{

5
dom/base/ShadowRoot.h
View file

@ -64,6 +64,11 @@ public:
return &DocumentOrShadowRoot::EnsureDOMStyleSheets();
}
/**
* Clones internal state, for example stylesheets, of aOther to 'this'.
*/
void CloneInternalDataFrom(ShadowRoot* aOther);
/**
* Distributes all the explicit children of the pool host to the content
* insertion points in this ShadowRoot.

27
dom/base/nsNodeUtils.cpp
View file

@ -653,8 +653,31 @@ nsNodeUtils::CloneAndAdopt(nsINode *aNode, bool aClone, bool aDeep,
}
}
if (aDeep && !aClone && aNode->IsElement()) {
if (ShadowRoot* shadowRoot = aNode->AsElement()->GetShadowRoot()) {
if (aDeep && aNode->IsElement()) {
ShadowRoot* shadowRoot = aNode->AsElement()->GetShadowRoot();
if (!shadowRoot) {
// Nothing to do here.
} else if (aClone && clone->OwnerDoc()->IsStaticDocument()) {
ShadowRootInit init;
init.mMode = shadowRoot->Mode();
RefPtr<ShadowRoot> newShadowRoot =
clone->AsElement()->AttachShadow(init, aError);
if (NS_WARN_IF(aError.Failed())) {
return nullptr;
}
newShadowRoot->CloneInternalDataFrom(shadowRoot);
for (nsIContent* originalChild = shadowRoot->GetFirstChild();
originalChild;
originalChild = originalChild->GetNextSibling()) {
nsCOMPtr<nsINode> child = CloneAndAdopt(originalChild, aClone, aDeep, nodeInfoManager,
aReparentScope, aNodesWithProperties, newShadowRoot,
aError);
if (NS_WARN_IF(aError.Failed())) {
return nullptr;
}
}
} else if (!aClone) {
nsCOMPtr<nsINode> child = CloneAndAdopt(shadowRoot, aClone, aDeep, nodeInfoManager,
aReparentScope, aNodesWithProperties, clone,
aError);