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-rw-r--r--dom/base/Element.cpp41
-rw-r--r--dom/base/Element.h7
2 files changed, 46 insertions, 2 deletions
diff --git a/dom/base/Element.cpp b/dom/base/Element.cpp
index 96ccfd52a..31af0c1db 100644
--- a/dom/base/Element.cpp
+++ b/dom/base/Element.cpp
@@ -2451,11 +2451,44 @@ Element::OnlyNotifySameValueSet(int32_t aNamespaceID, nsIAtom* aName,
}
nsresult
+Element::SetSingleClassFromParser(nsIAtom* aSingleClassName)
+{
+ // Keep this in sync with SetAttr and SetParsedAttr below.
+
+ if (!mAttrsAndChildren.CanFitMoreAttrs()) {
+ return NS_ERROR_FAILURE;
+ }
+
+ nsAttrValue value(aSingleClassName);
+
+ nsIDocument* document = GetComposedDoc();
+ mozAutoDocUpdate updateBatch(document, UPDATE_CONTENT_MODEL, false);
+
+ // In principle, BeforeSetAttr should be called here if a node type
+ // existed that wanted to do something special for class, but there
+ // is no such node type, so calling SetMayHaveClass() directly.
+ SetMayHaveClass();
+
+ return SetAttrAndNotify(kNameSpaceID_None,
+ nsGkAtoms::_class,
+ nullptr, // prefix
+ nullptr, // old value
+ value,
+ static_cast<uint8_t>(nsIDOMMutationEvent::ADDITION),
+ false, // hasListeners
+ false, // notify
+ kCallAfterSetAttr,
+ document,
+ updateBatch);
+}
+
+nsresult
Element::SetAttr(int32_t aNamespaceID, nsIAtom* aName,
nsIAtom* aPrefix, const nsAString& aValue,
bool aNotify)
{
- // Keep this in sync with SetParsedAttr below
+ // Keep this in sync with SetParsedAttr below and SetSingleClassFromParser
+ // above.
NS_ENSURE_ARG_POINTER(aName);
NS_ASSERTION(aNamespaceID != kNameSpaceID_Unknown,
@@ -2520,7 +2553,7 @@ Element::SetParsedAttr(int32_t aNamespaceID, nsIAtom* aName,
nsIAtom* aPrefix, nsAttrValue& aParsedValue,
bool aNotify)
{
- // Keep this in sync with SetAttr above
+ // Keep this in sync with SetAttr and SetSingleClassFromParser above
NS_ENSURE_ARG_POINTER(aName);
NS_ASSERTION(aNamespaceID != kNameSpaceID_Unknown,
@@ -2764,6 +2797,10 @@ Element::BeforeSetAttr(int32_t aNamespaceID, nsIAtom* aName,
// If it is ever made to be exact, we probably need to handle this
// similarly to how ids are handled in PreIdMaybeChange and
// PostIdMaybeChange.
+ // Note that SetSingleClassFromParser inlines BeforeSetAttr and
+ // calls SetMayHaveClass directly. Making a subclass take action
+ // on the class attribute in a BeforeSetAttr override would
+ // require revising SetSingleClassFromParser.
SetMayHaveClass();
}
}
diff --git a/dom/base/Element.h b/dom/base/Element.h
index 76f0767e6..88f416be7 100644
--- a/dom/base/Element.h
+++ b/dom/base/Element.h
@@ -601,6 +601,13 @@ public:
uint8_t* aModType, bool* aHasListeners,
bool* aOldValueSet);
+ /**
+ * Sets the class attribute to a value that contains no whitespace.
+ * Assumes that we are not notifying and that the attribute hasn't been
+ * set previously.
+ */
+ nsresult SetSingleClassFromParser(nsIAtom* aSingleClassName);
+
virtual nsresult SetAttr(int32_t aNameSpaceID, nsIAtom* aName, nsIAtom* aPrefix,
const nsAString& aValue, bool aNotify) override;
// aParsedValue receives the old value of the attribute. That's useful if